FIELD OF THE INVENTION
The present invention relates to LED VJ and in particular LED TV having the display screen obtained of LED pixels. The LED TV of the invention provides for advantageous utilization of LED pixels comprising a cluster of 3 LEDs of the three basic colours - red, green, blue (RGB)- or one three-in-one-RGB chip-LED arranged in the form of a rectangular matrix. The LED TV of the invention thus favour providing for the first time a LED based TV screen display wherein LEDs could be energized in a controlled manner when current passes through them and they emit native colours with varying intensities depending on the amount of current passing through them while displaying processor controlled live or stored video contents / animations / images. LED pixels, with the 3 RGB LED clusters or the chip LED, exhibit innumerable colour combinations by virtue of the selective grouping. The LED pixels organised in an array providing a module with several modules placed together providing the LED based screen display of desired shape and size. The modular construction in the LED TV of the invention facilitates seamless integration of modules to build screens of any size, pitch and resolution. The LED TV of the invention thus involves LED based display screen through digital visual interfaces and video output can be viewed on the screen. The wide range of resolutions, colours and intensities makes the screen an effective medium to render near-natural real life colours. The LED TV is an intelligent, robust and rugged device proposed for use in 'Home' or 'Out of Home (OoH)' entertainment, commercial and / or educational applications, indoors or outdoors, fixed or mobile; and accordingly adapted to modulate desired resolutions for indoor and outdoor applications and withstand all weathers, wind and vibration with proper ratings of Ingress Protection, The LED TV of the invention is further adapted to support multiple TV transmission standards like Standard Definition (SD) or High Definition (HD) TV. The LED TV achieves advantageous day-and-night visibility, viewable by a large gathering (500+) and from a distance (50 mtrs + ) or at wide angles (140° horizontal, 40° vertical), indoors and outdoors, sharp picture quality, rich colour contrasts, automatic brightness control based on the ambient light, manual or auto / programmed dimming for power saving and ability to be networked with a centralized control etc. LED's long life span of over 100,000 hours facilitates / guarantees a minimum useful life of over 15 years for the TV screen (considering 8 hours of operation in a day). Advantageously also the LED TV can also be configured to operate in various other modes - through remote control - over a wired / wireless mobile data network or even through a web server to display live video / animated

graphics/ text information of interest - like time of the day, weather conditions, market prices or stock listings etc.
BACKGROUND ART
Electronic display technology solutions like conventional CRT TV and LCD screens have been in use, which are usually connected over a cable network to continuously telecast the advertisement still images / animations / localized videos.
Moreover, while electronic displays such as CRT TV and LCD based advertisements systems are also known and available which are found to always have limitations in imparting flexibility to the advertisement media in terms of its shape and configuration and also assembling complexities. Thus while CFIT TV and LCD screens are one piece subjects and do not cater to needs of modular orientations in shapes, configurations and sizes there is always a limitation and complexity in its assembling and use as a display media. And also the performance of these CRT and LCD displays in outdoor or high-light indoor conditions may not be appreciable by the viewers because of the basic limitations of operational less intensities.
In our copending patent application No. 2621/CHE/2008 there is disclosed an LED based poster/advertisement system which would be adapted to avoid the afore-discussed limitations and complexities in electronic advertising of products or services such as electronic displays involving TV and/or LCD screens.
Thus in our said copending patent application there is provided for an LED based poster/advertisement system comprising plurality of LED modules each having plurality of LED pixels and adapted to operatively combine to provide for atleast one electronic display means as 'Digi Posters' of varied shape, configuration and size, said atleast one electronic display means operatively connected to a central control station over a wired or wireless/mobile data network or through web server.
It is however experienced that while the above provision of LED based intelligent poster/advertisement system did serve for the much desired flexibility in electronic advertisement especially involving still photographic images and/or localized video outputs, such a simple electronic display involving a LED display was on its own not sufficient to

serve the purposes of receiving and displaying live/direct TV programmes and the like involving continued video presentations of varied supply stations and of diverse resolutions and characteristics.
The presently known television display technologies to meet the consumer need of good and comfortable viewing and user friendly attributes have over the years advanced from the conventional CRT screens through Plasma screens to LCD screens.
It is also very recently known in the art that recent technological breakthrough includes LCD TVs which although are being promoted as LED TVs- are basically LCD TVs wherein only the display screen 'back-lit' or 'edge-lit' is being provided by way of white LEDs placed behind the LCD screen by way of a cost-effective utilization of low power consuming LEDs.
Importantly however, even such LCD TV screens or so-called LED TVs with LCD screened display continue to have the same limitations affecting all LCD TVs and are found to be comfortably viewable only within a limited short distances and relatively smaller view angles. Added to the above they fail in providing bright and clear, day-and-night visibility, indoors and outdoors, when viewed from a long distance or at wider view angles or for large number of viewers in various 'Out of Home' applications. Also, as the screen sizes increase, manufacturing yield becomes a concern, as the big LCD screen is to be handled very carefully as an integral piece. Further, the LCD screens are prone to pixel defects which render them unusable as well as unserviceable, needing the entire screen to be replaced.
There has thus been a need in the art to overcome the limitations of the existing display screen technologies for on line direct TV transmission based beaming applications by providing a low cost and user friendly solution to address the need for wide view angle to large assembly of viewers a clear picture of desired resolution with adaptable brightness at daylight as well as in darkness of night for TV screens beaming realtime video images along with audio.
OBJECTS OF THE INVENTION
It is thus the basic object of the present invention to provide for true sense LED TV involving LED display screen for real time video and audio reception from TV stations and

the like of variety of characteristics maintaining desired image quality/resolution for indoor as well as outdoor application with bright daylight and night visibility which would not only impart a more comfortable and better viewing but also avoid complexities in TV manufacture and maintenance.
Another object of the present invention is directed to providing a true sense LED TV having said LED based display screen adapted to ensure wide view angle and superior picture quality with higher granularity of resolution and brightness for indoor and outdoor application in both broad daylight and at darkness of night.
A further object of the present invention is to developing an LED TV having said LED based display screen adapted to deploy selective pitch length for a wide number of display screen sizes, indoor or outdoor, involving the modular construction facilitating seamless integration of modules e.g. cluster of LEDs to build screens of any size, pitch and resolution.
A still further object of the present invention is to developing an LED TV having said LED based display screen adapted to display on-line Video signals from a number of TV stations fed to the LED Display screen through selective video processing interface such as to on one hand impart viewing comfort both in-house as well as out of house locations and also on the other hand make the manufacture and handling of TV irrespective of its size more comfortable and user friendly.
A still further object of the present invention is to provide for LED TV having said LED based display screen adapted to display wide range of resolutions, colours and intensities thereby providing the LED screen as an effective medium to render near-natural real life colours.
A still further object of the present invention is to provide for a LED TV having said LED based display screen adapted for on-line real time TV transmission viewing along with possible video image/text display along with matching audio output.
A still further object of the present invention is to provide for LED TV having said LED based display screen adapted for automatic brightness control based on the ambient light, manual or auto / programmed dimming for power saving and ability to be networked with a centralized control. Auto dimming feature also enables better viewing comfort of the

' display content to the viewers for different ambient lighting conditions of the display screen location.
A still further object of the present invention is to provide for an LED TV having said LED based display screen adapted to selective Out-Of-Home application with desired weather resistant housing and commensurate wind and vibration resistance with proper ratings of Ingress Protection.
A still further object of the present invention is to provide for an LED TV having said LED based display screen adapted to useful life of over 15 years for the TV screen considering 8 hours of operation in a day).
A still further object of the present invention is to provide for an LED TV having said LED based display screen adapted to support multiple TV transmission standards like Standard Definition (SD) or High Definition (HD) TV.
A still further object of the present invention is to provide for an LED TV having said LED based display screen adapted to be configured to operate in various other modes - through remote control - over a wired / wireless mobile data network or even through a web server to display live video / text / animated graphics information of interest - like time of the day, weather conditions, market prices or stock listings etc.
A still further object of the present invention is directed to providing for LED TV involving said LED based display screen wherein the sizes of screen ranges can selectively comprise 60", 85" and 110" (diagonal) for indoor application and 110", 140" and 165" (diagonal) for outdoor application.
A still further object of the present invention is directed to provide for an LED TV involving said LED based display screen adapted for covering the aspect ratios 4:3 deployed for standard definition TV and 16:9 deployed for high definition TV.
A still further object of the present invention is directed to provide for LED TV involving said LED based display screen wherein live Video signals from commercial TV channels (Dish or cable from service providers) or live output of video camera used in functions and events -

can be directly fed to the LED TV for a comfortable viewing both in house and outside locations.
A still further object of the present invention is directed to provide for an LED TV involving said LED based display screen wherein video output from DVD or Blu - ray disc; or stored content from Hard Disc or SD flash memory card can also be used to drive the TV with videos or images.
A still further object of the present invention is directed to provide for desired LED TV involving said LED based display screen wherein the video could be processed and presented on the LED display screen and audio presented on the speakers integrated to the TV.
A still further object of the present invention is directed to provide for LED TV involving said LED based display screen wherein tuners and image scalers could be provided in the external set top box or integrated within the TV.
A still further object of the present invention is directed to provide for LED TV involving said LED based display screen wherein the video processing unit (VPU) involving features like image scaling, de-interlacing, gamma correction, alpha blending and colour space conversion are selectively adapted to generate proper inputs to the LED screen based on the configuration data.
A still further object of the present invention is directed to provide for LED TV involving said LED based display screen, also adapted to accept inputs over USB port, Ethernet, GPRS or from the web and can be utilized in several other ways to display video, images, text and graphics simultaneously.
A still further object of the present invention is directed to provide for LED TV involving said LED based display screen, also adapted to play the different content on different segments of the target display screen, generally useful for advertisement function while displaying the actual live/video content. This enables the target display screen to be segmented into multiple segments, this feature being referred to as "split screen" / "plurality of windows".

A still further object of the present invention is directed to provide for LED TV involving said LED based display screen wherein said LED TV operates in a stand-alone mode or in a networked environment and can be controlled by a remote controller for operational requirements with capability to address / control each of the TVs in the network individually or as a cluster.
A still further object of the present invention is directed to provide for LED TV involving said LED based display screen adapted to ensure proper functioning and monitoring the health of the TV and periodic self tests and diagnostics are run for early detection of trends of malfunctioning.
A still further object of the present invention is directed to provide for LED TV involving said LED based display screen wherein the control electronics could be powered from standard 100-230V AC mains and at the same time the advantages of low power consuming LED based TV screen with effective viewing quality and characteristics could be integrated. A still further object of the present invention is directed to an LED TV involving said LED based modular structure display screen for trouble-shooting/health monitoring and maintenance is easy, faster and less expensive and thus eliminating the possibility of discarding a full TV screen for reasons of malfunctioning and thus saving substantially on cost of the customer.
A still further object of the present invention is directed to an LED TV involving said LED based display screen adapted to work under severe environmental conditions in outdoor applications protected with IP66 and indoors with IP32.
A still further object of the present invention is directed to provide for LED TV involving said LED based display screen which would be adapted for installing in different ways depending on the application - wall mounted, roof mounted or ceiling mounted, structure mounted, stand mounted (stands can be uni-pole, bi-pole or tri-pole etc) and vehicle mounted / mobile with generator to supply required power.
SUMMARY OF THE INVENTION
Thus according to the basic aspect of the present invention there is provided an LED TV comprising:

LED video display screen comprising plurality of LED modules obtained of array of LED pixels, said modules stacked together to define said LED display screen of desired shape and sizes;
processor means adapted such as to fit an incoming video size into the said LED display screen size; and
video interface means including a video processor unit with electronic circuitry operatively connecting said LED display screen to atleast an external TV input.
A further aspect of the present invention is directed to said LED TV wherein said LED pixel comprise of R G B LEDs in clusters of 3 or 4 LEDs or alternatively one single RGB 3-in-one LED chip in surface mount form.
A still further aspect of the present invention is directed to said LED TV wherein said processor means adapted such as to fit an incoming video size into the said LED screen size is integrated and said electronic circuitry of the video processing unit is adapted for scaling and other video processing features.
Another important aspect of the present invention is directed to said LED TV wherein incoming video to LED display screen is sized through said video processor unit.
A further aspect of the present invention directed to said LED TV wherein said video processing unit is adapted for functions including scaling, de-interlacing, colour-space conversion, Gamma correction, alpha blending, brightness control and compression.
According to a further aspect of the present invention there is provided an LED TV comprising means for automatic brightness control based on the ambient light, manual and/or auto/prog rammed dimming for power saving.
According to yet another important aspect of the present invention is directed to said LED TV wherein said VPU is adapted to selectively interface composite video, separate video, serial digital interface, video graphics array, digital visual interface and high definition multimedia interface.

A further aspect of the present invention directed to said LED TV comprising enhancement features including contrast enhancement and motion blur compensation, implemented through said VPU.
A still further aspect of the present invention is directed to said LED TV wherein in the LED screen the spacing between the consecutive pixels is selectively provided to determine the pitch and the number of pixels in the screen define the screen resolution.
A still further aspect of the present invention is directed to said LED TV comprising a 16 bit colour processing technique adapted to realize high quality pictures through 280-trillion colour combinations / shades.
According to another advantageous aspect of the present invention directed to said LED TV comprising means adapted to favour display of video both indoors and outdoor applications and the resolution and the pitch of the LED Screen are selectively provided .
A still further aspect of the present invention is directed to said LED TV wherein for outdoor applications, long distance viewing, the pixel pitch is selectively provided as 9mm and 12.7 mm while for indoor applications, closer orientations of pixels are provided having a pitch value selectively of 12.7mm, 9mm, 7mm, 6mm and 4 mm.
A still further aspect of the present invention is directed to said LED TV comprising an aspect ratio of 4:3 for standard definition TVs and 16:9 for high definition TVs.
Advantageously also said LED TV according to the present invention is adapted to accept inputs selectively from one or more of USB ports, Ethernet, GPRS or Web such as to display video, images, text and graphics simultaneously.
A still further aspect of the present invention is directed to said LED TV adapted to operate in stand-alone mode or in a networked environment and adapted to be controlled by a remote controller for operational requirements with capabilities to address/control each of the LED TVs in the network Individually or as a cluster.
An yet further aspect of the present invention is directed to said LED TV comprising microprocessor means adapted to ensure proper functioning and monitoring of the TV
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including means for running periodic self tests and diagnostics for early detection of trends of malfunctioning.
According to yet another advantageous aspect of the LED TV according to the present invention is adapted such that any defective LED screen pixels are localized and the module is replaceable with functioning module at the basic building block level preferably involving selective module-addressing scheme favouring identification of localized defective spots.
A further important aspect of the present invention is directed to said LED TV comprises embedded controllers operatively connected to external server means and said LED display screen comprises plurality of windows adapted to display still and/or animated images, SMS messages, scrolling of additional text /video over and above provision for beaming live TV programmes.
A still further aspect of the present invention is directed to said LED TV comprising the electronic circuitry, the housing and cooling systems adapted to facilitate long life of the order of 100,000 operational hours of the LEDs in the display screen.
A still further aspect of the present invention is directed to said LED TV comprising automatic correction /compensation means adapted to restore the original colour and illumination based on ambient conditions and /or in case of any degradation in signal inputs and related parameters.
A still further aspect of the present invention is directed to said LED TV wherein said image scaling means is adapted to fit (compress/enhance) the received image based on the pixel numbers into the screen size pixel numbers preferably by obtaining inputs from the configuration parameters and thereafter resizing the image received accordingly, said gamma correction means comprises provision to program the Gamma value from 1 to 10, said alpha blending means involves alpha value in the colour code ranging from 0.0 to 1.0 wherein 0.0 represents full transparent colour while 1.0 represents full opaque colour, said brightness control means comprise multiplication factor to the actual display data.
A still further aspect of the present invention is directed to said LED TV adapted to operate on 100-230VAC and withstand environmental conditions of indoors and outdoors with protection of IP32 and IP66 respectively.
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A still further aspect of the present invention is directed to said LED TV adapted for installation in selective orientations depending on the end application preferably selected from wall mounted, roof mounted or ceiling mounted, structure mounted, stand mounted including uni-pole, bi-pole or tri-pole and vehicle mounted as mobiles.
The present invention and its objects and advantages are described in greater detail with reference to the following accompanying non-limiting illustrative drawings and examples.
BRIEF DESCRIPTION OF THE ACCOMPANYING FIGURES
Figure 1: is the schematic illustration of the block diagram representing processor based control circuitry of the LED TV involving LED display screen according to the present invention adapted to display of video content by direct telecast or any recorded/store video content along with matching audio output, either for stand alone or networked LED TVs.
Figure 2: is the schematic illustration of the front view and rear view of the Integral LED TV showing the LED display screen with speakers as well as Integrated control circuitry for a variety of inputs through standard connectors and various interfaces for processing of selective inputs in VPU in the integral configuration of LED TV according to the present invention.
Figure 3: is the schematic illustration of an embodiment of the present invention of a simple block diagram of LED TV based system having external TV inputs.
Figure 4: is the schematic embodiment of the LED TV system with LED display screen based video output.
DETAILED DESCRIPTION OF THE INVENTION WITH REFERENCE TO THE ACCOMPANYING FIGURES
The present invention relates to LED TV for indoor as well as outdoor applications with LED based display screen, adapted to display video images along with audio outputs. The LED TV screen uses LED pixels laid out in an array or a rectangular matrix with a cluster of 3 RGB LEDs or one 3-in-l chip-LED forming one pixel for desired resolution, picture quality
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' achieved through use of selective pitch length cooperating with the size and/ or viewing distance of display TV screen. Several such pixels organized in an array make a module (basic building block) and several modules placed together constitute a screen of desired size. The number of pixels in a screen determines the resolution. The present invention is directed to a LED TV system using LED display screen that are modular in structure and screens of any size can be realized, though the invention proposes few selective sizes considering commercial preferences. There are no yield concerns in this approach regardless of size of screen. Defects developed can be localized and serviced. Bright day-and-night visibility, clear visibility from a distance or at wider angles, sharp image quality, rich colour combinations, auto brightness control sensing the ambient are some prominent features of the so-called True colour LED Video Display' based 'LED TV' solution, for both Indoor / Outdoor applications. Quality pictures in lively colours can be viewed and enjoyed by a large assembly, with a minimum viewing distance of 5 times the screen size in diagonal. The video processor unit of the LED TV processes different video inputs from alternate sources and generates appropriate signal to display the desired image resolution, colour and picture clarity on LED TV screen. The VPU generates proper inputs to the LED screen based on the factory / user configured data. Image scaling, de-interlacing, gamma correction, alpha blending and colour space conversion are the rich set of features available in the VPU. The LED TV according to the invention employs powerful microprocessor to ensure proper functioning and monitoring the health of the LED TV. The processor also enables periodic self-tests and diagnostics that are run for early detection of trends of malfunctioning. The LED TV having LED pixel based video display screen according to the present invention is thus having wide prospects of house hold as well as commercial applications in a number of ways, indoor or outdoor, fixed or mobile mounting of the screen for a number of out of house applications with clear daylight / day-and-night visibility for a large assembly.
The display screens are designed for operation either indoors or outdoors. The Vesolution' defined by the number of pixels on the screen or the 'pitch' (distance between consecutive pixels in horizontal and/or in vertical) is accordingly decided. For outdoor applications, in order to view from longer distances, the pixel pitch employed is 9.52mm and 12.7mm, whereas for indoor applications, closer organization of the pixels enhances the picture quality and hence the pitch values of 12.7mm, 9.52mm, 7.62mm, 6.76mm and 4.76mm are advantageously deployed.
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' The screen sizes selected for offering to market are the ones most popularly employed in
indoor or outdoor applications comprising 60", 85", 110" (diagonal) for indoor application
and 110", 140" and 165" (diagonal) for outdoor application - covering aspect ratios 4:3 and
16:9. The aspect ratio 4:3 is deployed in the Standard Definition TV and 16:9 is deployed in
it the High Definition TV. The video processing unit (VPU) performs the image scaling to suit a
screen size from any input video/live telecast signal.
A color processing technology of upto 16-bit is employed in the design of the true colour
video displays, which implies a depth of processing upto 280 trillion colour combinations to
r select from. This greatly enhances the colour clarity and quality.
Reference is first invited to the accompanying Figure 1 that schematically illustrates the block diagram representing processor based control circuitry of the LED TV involving LED display screen according to the present invention. Live Video signals from commercial TV channels (Dish or cable from service providers) or live output of video camera used in functions and events - can be directly fed to the LED TV. The LED TV also supports HD TV resolutions / aspect ratio. While the video is processed and presented on the LED screen, audio is presented on the speakers integrated to the LED TV. Tuners and image scalers are provided in the external set top box or integrated within the LED TV. Video output from DVD or Blu-ray disc can be viewed on the LED TV. Stored content from Hard Disc or SD flash memory card can also be used to drive the TV with videos or images.
Importantly, the LED screen and the control electronics are powered by a 5V SMPS which in turn gets power from 100-230V AC mains. LEDs are driven at very low voltages like 3.5 V DC.
It is clearly apparent from the accompanying Figure 2 that a number of Video inputs like Composite video, S-Video, SDI / HDI, VGA, DVI or HDMI are available on standard connectors and are connected to the LED TV through mating connectors and channeled through corresponding interfaces to the video processing unit (VPU). The VPU generates proper inputs to the LED screen based on the configuration data. Image scaling, de-interlacing, gamma correction, alpha blending and colour space conversion are the rich set of features available in the VPU. The processing of the signals in VPU is carried out in following manner:
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' Image Scaling; Image scaling refers to fit - i.e. to compress / enhance - the received image (pixel numbers) into the screen size (pixel numbers). The function uses the configuration parameters to resize the image received.
De-Interlacing: Interlaced video is generally used in Television standards like PAL and NTSC while progressive video is required for LCD and LED Displays. So a process named De-interlacing has to be performed on the interlaced video received from the TV broadcast channels. There is a provision in the software to by pass this function.
Gamma Correction: Photography involves non linear intensity reproduction. Non-Linearity of a film is characterized by the parameter Gamma. The effect of gamma in films concerns the appearance of the picture rather than the accurate reproduction of the intensity values. Gamma correction is the name of a non linear function used to code and decode luminance in video or still images. The Gamma value can range from 1 to 10.
Alpha blending: Alpha blending is a convex composition of two colors allowing for transparency in effects of computer graphics. Alpha value in the color codes ranges from 0.0 to 1.0, where 0.0 represents full transparent color and 1.0 represents full opaque color.
Provision is also made in the VPU to blend the text messages received from user interface ports with the video / graphics data received through the video input.
Brightness control: The brightness control function in LED displays is implemented as a multiplication factor to the actual display data.
Color Space conversion: The color space conversion feature is required to process some of the video features.
The LED TV according to the present invention also accepts inputs over USB port, Ethernet, GPRS or from the web and can be utilized in several other ways to display video, images, text and graphics simultaneously. Advantageously also, the LED TV can operate in a stand¬alone mode or in a networked environment and can be controlled by a remote controller for operational requirements with capability to address / control each of the LED TVs in the network individually or as a cluster.
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EXAMPLE II:
In one such embodiment as illustrated in the accompanying Figure 4, the screen area may be divided into several windows as indicated in Figure 4. A Framel window is a larger portion and can be used to display images like posters or photo albums etc. The content for this could be taken from a 2GB SD Flash and organized into play lists of 10-20 and scrolled in a desired manner. Rest of the area may be subdivided into Frame 2, Frame 3 and Frame 4. Separate input signals may drive these individual windows through connectivity over serial port, USB port, Ethernet or GPRS enabling sending SMS messages with mobiles.
EXAMPLE III:
According to yet another embodiment, LED TV can be conceived for a useful application in educational institutions wherein the LED display screen means can be gainfully used to flashing institutional messages like exam schedules, results, important timelines etc for the attention of students or teachers and public in general. It can also be used to providing entertainment in more purposeful applications including multimedia based gaming/graphics options. Another important application is to facilitate students to prepare/practice for competitive / proficiency tests/online examinations like TOEFL, GRE, GMAT etc. This is achieved by flashing the e-learning packages from the stored content onto the screen with the benefit of several students attending simultaneously with provision for interactive participation and doubt clearing sessions.
It is thus possible by way of the present invention to developing a LED TV system adapted to display live telecast contents on LED based display screen with improved picture resolution and processor based control of video input signal wherein the VPU generates proper inputs to the LED screen based on the configuration data, conducting image scaling, de-interlacing, gamma correction, alpha blending and colour space conversion in the VPU. The LED TV system of the present invention is adapted to accept a wide range of input signals such as the live Video signals from commercial TV channels (Dish or cable from service providers) or live output of video camera used in functions and events; Video outputs of DVD and Blu-ray players; and Stored content from Hard Disc or SD card etc to drive the TV with images or videos. The LED TV displays video / images on LED display screen and audio content is delivered through speakers. The system provides a wide range of sizes of screen for indoor as well as outdoor applications with desired picture resolution
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by selective provisioning of the pitch of pixels on display screen. The LED TV according to the present invention also accepts inputs over USB port, Ethernet, GPRS or from the web and can be utilized in several other ways to display video, images, text and graphics simultaneously. Advantageously also, the LED TV can operate in a stand-alone mode or in a networked environment and can be controlled by a remote controller for operational requirements with capability to address / control each of the LED TVs in the network individually or as a cluster. The screen of LED TV can be installed in a number of ways to suit viewing from selective distance and view angle, either indoor or outdoor, facilitating application of the LED TV for a number of Out of Home applications for household as well as commercial applications including academic, sports and athletics and the like purposes, in a simple, reliable and cost effective manner, ensuring rich quality viewing experience of video display along with audio output.
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WE CLAIM:
1. LED TV comprising:
LED video display screen comprising plurality of LED modules obtained of array of LED pixels, said modules stacked together to define said LED display screen of desired shape and sizes;
processor means adapted such as to fit an incoming video size into the said LED display screen size; and
video interface means including a video processor unit with electronic circuitry operatively connecting said LED display screen to atleast an external TV input.
2. LED TV as claimed in claim 1 wherein said LED pixel comprise of R G B LEDs in clusters of 3 or 4 LEDs or alternatively one single RGB 3-in-one LED chip in surface mount form.
3. LED TV as claimed in anyone of claims 1 or 2 wherein said processor means adapted such as to fit an incoming video size into the said LED screen size Is integrated and said electronic circuitry of the video processing unit is adapted for scaling and other video processing features.
4. LED TV as claimed in anyone of claims 1 to 3 wherein incoming video to LED display screen is sized through said video processor unit.
5. LED TV as claimed in anyone of claims 1 to 4 wherein said video processing unit is adapted for functions including scaling, de-interlacing, colour-space conversion. Gamma correction, alpha blending, brightness control and compression.
6. LED TV as claimed in anyone of claims 1 to 5 comprising mans for automatic brightness control based on the ambient light, manual and/or auto/programmed dimming for power saving.
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7. LED TV as claimed in anyone of claims 1 to 6 wherein said VPU is adapted to selectively interface composite video, separate video, serial digital interface, video graphics array, digital visual interface and high definition multimedia interface.
8. LED TV as claimed in anyone of claims 1 to 7 comprising enhancement features including contrast enhancement and motion blur compensation.
9. LED TV as claimed in anyone of claims 1 to 8 wherein in the LED screen the spacing between the successive pixels is selectively provided to determine the pitch and the number of pixels in a screen define the screen resolution.
10. LED TV as claimed in anyone of claims 1 to 9 comprising a 16 bit colour processing technique adapted to realize high quality pictures through 280-trillion colour combinations / color shades.
11. LED TV as claimed in anyone of claims 1 to 10 comprising means adapted to favour display of video both indoors and outdoor applications and the resolution and the pitch of the LED Screen are selectively provided.
12. LED TV as claimed in claim 11 wherein for outdoor applications, long distance viewing, the pixel pitch is selectively provided as 9.52mm and 12.7mm while for indoor applications, closer orientation of pixels is provided having a pitch value selectively of 12.7mm, 9.52mm, 7.62mm, 6.35mm and 4.76 mm.
13. LED TV as claimed in anyone of claims 1 to 12 comprising an aspect ratio of 4:3 supported for standard definition TVs and 16:9 for high definition TVs.
14. LED TV as claimed in anyone of claims 1 to 13 adapted to accept inputs selectively from one or more of USB ports, Ethernet, GPRS and Web such as to display video, images, text and graphics simultaneously.
15. LED TV as claimed in anyone of claims 1 to 14 adapted to operate in stand-alone mode or in a networked environment and adapted to be controlled by a remote controller for operational requirements with capabilities to address/control each of the TVs in the network individually or as a cluster.
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16. LED TV as claimed In anyone of claims 1 to 15 comprising microprocessor means adapted to ensure proper functioning and monitoring of the TV including means for running periodic self tests and diagnostics for early detection of trends of malfunctioning.
17. LED TV as claimed in anyone of claims 1 to 16 adapted such that any defective LED screen pixel is localized and the module is replaceable with functioning module at the basic building block level preferably involving selective module-addressing scheme favouring identification of localized defective spots.
18. LED TV as claimed in anyone of claims 1 to 17 comprises embedded controller operatively connected to external server means and said LED display screen comprises plurality of windows adapted to display still and/or animated images, SMS messages, scrolling of additional text / video over and above provision for beaming live TV programmes.
19. LED TV as claimed in anyone of claims 1 to 18 comprising the electronic circuitry, the housing and cooling systems adapted to facilitate long life of the order of 100,000 operational hours of the LEDs in the display screen.
20. LED TV as claimed in anyone of claims 1 to 19 comprising automatic correction /compensation means adapted to restore the original colour and illumination based on ambient conditions and / or in case of any degradation in signal inputs and related parameters.
21. LED TV as claimed in anyone of claims 1 to 20 wherein said image scaling means is adapted to fit (compress / enhance) the received image based on the pixel numbers into the screen size pixel numbers preferably by obtaining inputs from the configuration parameters and thereafter resizing the image received accordingly, said gamma correction means comprises provision to program the Gamma value from 1 to 10, said alpha blending means involves alpha value in the colour code ranging from 0.0 to 1.0 wherein 0.0 represents full transparent colour while 1.0 represents full opaque colour, said brightness control means comprise multiplication factor to the actual display data.
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22. LED TV as claimed in anyone of" claims 1 to 21 adapted to operate on 100-230VAC
and withstand environmental conditions of indoors and outdoors with protection of
IP32 and IP66 respectively.
23. LED TV as claimed in anyone of claims 1 to 22 adapted for installation in selective
orientations depending on the end application preferably selected from wall
mounted, roof mounted or ceiling mounted, structure mounted, stand mounted
including uni-pole, bi-pole or tri-pole and vehicle mounted / mobiles.
24. LED TV as claimed in anyone of claims 1 to 24 comprising said LED based TV screen
display wherein LEDs are adapted to be energized in a controlled manner when
current passes through them and they emit native colours with varying intensities
depending on the amount of current passing through them while displaying said
processor controlled video contents/images.
25. LED TV substantially as herein-described and illustrated with reference to the
accompanying figures.