DESC:FIELD
The present disclosure relates to television systems.
DEFINITIONS
The expression ‘liquid luminous’ used hereinafter in the specification refers to a term for an LED-LCD based television technology which is capable of reproducing 95 % of actual colours that the human eye is capable of perceiving.
The expression ‘LED’ used hereinafter in the specification refers to a semiconductor device that emits visible light when an electric current passes through it.
The expression ‘LCD’ used hereinafter in the specification refers to a flat-panel display or other electronic visual display that uses the light-modulating properties of liquid crystals.
The expression ‘polarizer’ used hereinafter in the specification refers to an optical filter that allows light of a specific polarization to pass and blocks waves of other polarizations. A polarizer can convert a beam of light of undefined or mixed polarization into a beam of well-defined polarization, which is polarized light.
The expression ‘NTSC’ used hereinafter in the specification refers to National Television System Committee, which is a standard widely adopted for broadcast colour system. In NTSC, generally, 30 frames (images) are transmitted per second.
The expression ‘YUV’ used hereinafter in the specification refers to a colour space in terms of luma component (the brightness) and chrominance (UV) components (colour).
The expression ‘PWM’ used hereinafter in the specification refers to Pulse Width Modulation, which is a modulation technique that generates variable width pulses to represent the amplitude of an input signal.
The expression ‘image’ or ‘picture’ or ‘frame’ in this specification are used interchangeably and relate to an artifact that depicts visual perception.
These definitions are in addition to those expressed in the art.
BACKGROUND
Television (TV) is a widely used medium to provide knowledge, information and entertainment. Recently, television technology has reached to ultra high definition by using magnification and multiplication of pixels on a television screen. Despite the magnification and multiplication of pixels on the television screen, the conventional television systems are restricted by the following factors:
1. Low Colour Range:
A conventional LED (light emitting diode) TV includes a plurality of conventional light emitting diodes (LEDs) in a backlight matrix, wherein the conventional LED generates a blue light. When the conventional LED is coated with a dot of yellow phosphor, it emits white light. However, this white light is not pure white light, as pure white light is ideally a mixture of red, green and blue light in appropriate proportions. Since, white light generated by the conventional LED is not 100% pure, therefore, red light, green light and blue light produced from the white light and displayed on LED TV screen are not 100% pure. Therefore, the conventional LED TV can successfully reproduce only up to 72% of the actual colour gamut, based on NTSC (National Television System Committee) standards.
2. Colour Degradation:
The conventional LED is coated with a single layer of phosphor material, which may degrade picture properties such as the colour depth, contrast and sharpness of a picture over a span of certain years.
3. Eye Strain:
The conventional LED generates white light from blue light which is emitted there from. Since, only a single layer of coating is provided, the blue light may escape from the coating and be directly directed onto a television screen. The blue light has a high frequency and energy, which may cause eye strain. This makes watching TV strenuous for eyes over duration of time.
4. Low Motion Rates:
Conventional backlight matrix illuminates the TV screen unevenly. This result in slower transition between frames, thus fast moving images appear sluggish.
5. Dull or Shaded Picture:
Conventional LEDs generate white light by mixing yellow, which is again a mixture of red and green in some predefined proportion, with blue. This gives a dull white or certain shade of white depending upon how well the proportion of the three colours was maintained. The white content in the picture directly affects the brightness or vividness of the picture. A dull or impure white inevitably results in a dull or shaded picture.
Therefore, there is felt a need to limit the aforementioned drawbacks of conventional television systems and provide a television system having following features:
• accurate colour reproduction;
• clarity and vibrancy;
• colour longevity;
• optimized blue content in a picture;
• smooth transition from one frame to another frame; and
• optimum amount of colour saturation to each image.
OBJECTS
Some of the objects of the present disclosure, which at least one embodiment herein satisfies, are as follows:
An object of the system of the present disclosure is to provide a system that provides accurate colour reproduction.
Another object of the system of the present disclosure is to provide a system that provides clarity and vibrancy.
Still another object of the system of the present disclosure is to provide a system that provides colour longevity.
One more object of the system of the present disclosure is to provide a system that optimizes blue content in a picture.
Yet another object of the system of the present disclosure is to provide a system that provides smooth transition from one frame to another frame.
An additional object of the system of the present disclosure is to provide a system that provides optimum amount of colour saturation in each image.
Other objects and advantages of the present disclosure will be more apparent from the following description when read in conjunction with the accompanying figures, which are not intended to limit the scope of the present disclosure.
SUMMARY
The present disclosure envisages a liquid luminous television system. The system comprises a processor, a backlight driver, an LED-LCD panel, a tuner, a digital receiver controller, a first USB port, a second USB port, an IR module, an audio video receiver, a video component receiver, a sound amplifier and an HDMI bridge. The processor includes a video signal input module, a memory, a liquid luminous module, and a plurality of liquid luminous drivers. The video signal input module is configured to receive an input video signal. The memory is configured to store a set of pre-determined rules. The liquid luminous module is adapted to cooperate with the memory and the video signal input module and configured to receive and analyze the input video signal to derive a luminance signal, a chrominance signal and features of images forming video content of the input video signal. The liquid luminous module is further configured to generate driver control signals and a PWM control signal based on the pre-determined rules, the luminance signal, the chrominance signal and the video content. The plurality of liquid luminous drivers are adapted to cooperate with the liquid luminous module and configured to generate a plurality of liquid luminous signals, for enhancement and colour boosting of the images, based on the driver control signals. The backlight driver is adapted to cooperate with the processor and configured to receive the PWM control signal and generate a backlight control signal based on the PWM control signal. An LED-LCD panel is adapted to cooperate with the processor and the backlight driver and configured to receive the backlight control signal and the plurality of liquid luminous signals and configured to reproduce the images in natural colours, using the backlight control signal and the liquid luminous signals.
In one embodiment, the second set of pre-determined rules includes a group consisting of rules for controlling the backlight driver using YUV settings, controlling brightness, boosting colours and enhancing images. In another embodiment, the LED-LCD panel includes a liquid crystal display (LCD) panel having an array of pixels, a top polarizer and a bottom polarizer disposed proximal to opposite sides of the LCD panel, a backlight module, and a multilayer reflective polarizer. The backlight module is configured to emit light through a multilayer reflective polarizer and the bottom polarizer to illuminate at least a portion of the LCD panel. The multilayer reflective polarizer is disposed between the bottom polarizer and the backlight module, and is configured to perform polarization recycling. The backlight module comprises an array of liquid luminous light emitting diodes arranged in a matrix. Each of the liquid luminous light emitting diodes of the array includes an LED coated with at least two layers of phosphor. The at least two layers of phosphor comprise a first layer of red phosphor and a second layer of green phosphor. In yet another embodiment, the at least two layers of phosphor comprise a first layer of green phosphor and a second layer of red phosphor. Further, in an embodiment, the polarization recycling includes transmitting light with a first polarization direction (P1) and reflecting light with a second polarization direction (P2) toward the backlight module. The backlight module is further configured to depolarize the light with the second polarization direction (P2) and re-emit the depolarized light. In one embodiment, the LED-LCD panel is further configured to emit evenly diffused light in all directions to reproduce a complete image thereby providing smooth transition between the images. In another embodiment, the liquid luminous module includes a colour management module which employs the International Colour Consortium (ICC) standard.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWING
The liquid luminous television system of the present disclosure will now be described with the help of the accompanying drawing, in which:
Figure 1 illustrates a schematic block diagram of the liquid luminous television system in accordance with an embodiment of the present disclosure;
Figure 2 illustrates a cross sectional view of an LCD-LED panel in accordance with one embodiment of the present disclosure, for the liquid luminous television system of Figure 1.
Figure 3 illustrates a structure of a liquid luminous LED in accordance with one embodiment of the present disclosure.
List and details of reference Numerals used in the description and drawings:
Reference Numeral Reference
100 liquid luminous television system
102 processor
104 digital receiver controller
106 tuner
108 backlight driver
110 LCD-LED panel
112 video component receiver
114 sound amplifier
116 audio video receiver
118 HDMI bridge
120 first USB port
122 second USB port
124 IR (infra-red) module
126 video signal input module
128 memory
130 liquid luminous module
132 liquid luminous drivers
202 backlight module
204 multilayer reflective polarizer
206 bottom polarizer
208 liquid crystal display (LCD) panel
210 top polarizer
300 liquid luminous LED
302 conventional LED
304 at least two layers of phospher

DETAILED DESCRIPTION
The disclosure will now be described with reference to the accompanying embodiments which do not limit the scope and ambit of the disclosure. The description provided is purely by way of example and illustration.
Television (TV) is a widely used medium to provide knowledge, information and entertainment. Recently, television technology has reached to ultra high definition by using magnification and multiplication of pixels on a television screen. Despite the magnification and multiplication of pixels on the television screen, the conventional television systems are restricted by the factors namely low colour range, colour degradation, eye strain, dull or shaded picture and low motion rates.
The present disclosure provides a liquid luminous television system. The system of the present disclosure provides reproduction of images in natural colours. The system provides accurate colour gamut, strengthens sub-pixels (R, G, B) in every pixel, keeps picture colour consistent over years, optimizes blue light content in each picture, provides wider brightness range, provides smooth transition from one frame to another frame and provides optimum amount of colour saturation to each image.
Referring to the accompanying drawing, Figure 1 illustrates a block diagram of a liquid luminous television system (100) according to an embodiment of the present disclosure. The system (100) comprises a processor (102), optionally a digital receiver controller (104), a tuner (106), a backlight driver (108), an LCD-LED panel (110), a video component receiver (112), a sound amplifier (114), an audio video receiver (116), an HDMI (High Definition Multimedia Interface) bridge (118), a first USB (Universal Serial Bus) port (120), optionally a second USB port (122), at least one HDMI port (not shown in figure), a power supply (not shown in figure) and an IR (infra-red) module (124).
The processor (102) includes a video signal input module (126), a memory (128), a liquid luminous module (130) and a plurality of liquid luminous drivers (132). In an embodiment the processor (102) is application specific integrated circuit (ASIC). In an another embodiment the processor (102) further includes registers (not shown in figure), accumulators (not shown in figure), DSP modules (not shown in figure), analog processing units (not shown in figure), DAC (not shown in figure), and ADC (not shown in figure 1). The video signal input module (126) receives an input video signal. The memory (128) stores a set of pre-determined rules. In an embodiment, the set of pre-determined rules includes a group consisting of rules for controlling the backlight driver (108) using YUV settings, controlling brightness, boosting colours and enhancing images.
The liquid luminous module (130) cooperates with the memory (128) and the video signal input module (126). The liquid luminous module (130) receives the input video signal, analyzes the input video signal to derive a luminance signal, a chrominance signal and features of images forming video content of the input video signal, and generates driver control signals and a PWM (pulse width modulation) control signal based on the pre-determined rules, the luminance signal, the chrominance signal and the video content. The liquid luminous module (130) helps to provide optimum performance to the input video signal. The liquid luminous module (130) includes ICC_COLOR register values (international colour consortium), ICC_DETHER values and YUV settings for controlling the backlight driver (108). Further, the liquid luminous module (130) includes a colour management module (not shown in figure) which employs the International Colour Consortium (ICC) standard for colour conversions.
The plurality of liquid luminous drivers (132) cooperate with the liquid luminous module (130) and further generate a plurality of liquid luminous signals, for enhancement and colour boosting of the images, based on the driver control signals.
The backlight driver (108) cooperates with the processor (102). The backlight driver (108) receives the PWM control signal and further generates a backlight control signal based on the PWM control signal.
The LED-LCD panel (110) cooperates with the processor (102) and the backlight driver (108). The LED-LCD panel (110) receives the backlight control signal and the plurality of liquid luminous signals and further reproduces the images in natural colours, using the backlight control signal and the liquid luminous signals.
Figure 2 illustrates a cross sectional view of an LCD-LED panel (110) in accordance with one embodiment of the present disclosure. The LCD-LED panel (110) includes an LCD glass (not shown in figure), a backlight module (202) and a multilayer reflective polarizer (204). The LCD glass (not shown in figure) includes an LCD panel (208), a bottom polarizer (206) and a top polarizer (210). Depending on a manufacturing process or specification configuration, the LCD-LED panel (110) comprises at least a protective layer (not shown in figure), a front layer (not shown in figure) and a back glass layer (not shown in figure).
The liquid crystal display (LCD) panel (208) includes an array of pixels. The top polarizer (210) and the bottom polarizer (206) are disposed proximal to opposite sides of the LCD panel (208). The backlight module (202) emits light for the LCD panel (208). The multilayer reflective polarizer (204) is disposed between the bottom polarizer (206) and the backlight module (202), and performs polarization recycling.
The backlight module (202) includes a light source. The light source includes an array of liquid luminous light emitting diodes arranged in matrix. The backlight driver (108) controls the backlight module (202) using the liquid luminous module (130) of the processor (102). The multilayer reflective polarizer (204) works through polarization recycling. Typically, the thickness of multilayer reflective polarizer is 1.5 mm.
The backlight module (202) emits light through the multilayer reflective polarizer (204) and the bottom polarizer (206) to illuminate at least a portion of the LCD panel (208). The backlight module (202) emits P1 and P2 light. Light with a first polarization direction is P1 light and light with a second polarization direction is P2 light. In an embodiment, the P1 light is an on-axis polarized light and the P2 light is an orthogonally polarized light. The multilayer reflective polarizer (204) reflects the P2 light into the backlight module (202), where it is recycled into P1 and P2 light. The multilayer reflective polarizer (204) provides more P1 light and thus increases on-axis luminance. The backlight module (202) depolarizes the light with the second polarization direction (P2) and re-emits the depolarized light. The backlight module (202) provides a wider brightness range. The LCD-LED panel (110) provides evenly diffused light in all directions to create a complete frame which helps in smooth transition from one frame to another.
Figure 3 illustrates a structure of a liquid luminous LED (300) in accordance with one embodiment of the present disclosure. The liquid luminous LED includes a conventional LED (302) coated with at least two layers of phosphor (304). In accordance with one embodiment, the conventional LED (302) is first coated with a red phosphor and then with a green phosphor. In accordance with another embodiment, the conventional LED (302) is first coated with the green phosphor and then with the red phosphor. By multilayer coating the liquid luminous LED (300) is fabricated. Due to multilayer coating the liquid luminous LED (300) generates a white light with strong R (red), G (green) and B (blue) wavelengths.
In accordance with the present disclosure, a liquid luminous module (130), a multilayer reflective polarizer (204) and double coated light emitting diodes (liquid luminous LED (300)) enhances the picture quality.
In one working example, the liquid luminous television system (100) of the present disclosure and a conventional TV are tested using a colour analyzer (Konica Minolta CA210) and a pattern generator (MIK 7256). Table 1 shows the experimental performance parameters of the conventional TV compared to the experimental performance parameters of the liquid luminous television system (100) of the present disclosure.
Test Conventional TV Television system (100) of the present disclosure
NTSC NTSC
X Y X Y
R 0.624 0.332 0.658 0.313
G 0.311 0.629 0.271 0.689
B 0.147 0.056 0.147 0.038
Colour Gamut using HERON'S FORMULA

72.1%

94.4%
(Table 1)
Thus, the liquid luminous television system (100) of the present disclosure reproduces 94.4% of actual colours that the human eye is capable of perceiving, as compared to 72% of actual colours in the conventional TV.

TECHNICAL ADVANCEMENTS
A liquid luminous television system (100) in accordance with the present disclosure described herein above has several technical advancements including but not limited to the realization of:
• a system that provides accurate colour reproduction;
• a system that provides clarity and vibrancy;
• a system that provides colour longevity;
• a system that optimizes blue content in a picture;
• a system that provides smooth transition from one frame to another frame; and
• a system that provides optimum amount of colour saturation to each image.
The embodiments herein and the various features and advantageous details thereof are explained with reference to the non-limiting embodiments in the following description. Descriptions of well-known components and processing techniques are omitted so as to not unnecessarily obscure the embodiments herein. The examples used herein are intended merely to facilitate an understanding of ways in which the embodiments herein may be practiced and to further enable those of skill in the art to practice the embodiments herein. Accordingly, the examples should not be construed as limiting the scope of the embodiments herein.
Throughout this specification the word “comprise”, or variations such as “comprises” or “comprising”, will be understood to imply the inclusion of a stated element, integer or step, or group of elements, integers or steps, but not the exclusion of any other element, integer or step, or group of elements, integers or steps.
The use of the expression “at least” or “at least one” suggests the use of one or more elements or ingredients or quantities, as the use may be in the embodiment of the disclosure to achieve one or more of the desired objects or results.
The foregoing description of the specific embodiments will so fully reveal the general nature of the embodiments herein that others can, by applying current knowledge, readily modify and/or adapt for various applications such specific embodiments without departing from the generic concept, and, therefore, such adaptations and modifications should and are intended to be comprehended within the meaning and range of equivalents of the disclosed embodiments. It is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation. Therefore, while the embodiments herein have been described in terms of preferred embodiments, those skilled in the art will recognize that the embodiments herein can be practiced with modification within the spirit and scope of the embodiments as described herein.
,CLAIMS:1. A liquid luminous television system (100), said system (100) comprising:
o a processor (102), said processor (102) comprises:
• a video signal input module (126) configured to receive an input video signal,
• a memory (128) configured to store a set of pre-determined rules,
• a liquid luminous module (130) adapted to cooperate with said memory (128) and said video signal input module (126) and configured to:
? receive and analyze said input video signal to derive a luminance signal, a chrominance signal and features of images forming video content of said input video signal, and
? generate driver control signals and a PWM (pulse width modulation) control signal based on said pre-determined rules, said luminance signal, said chrominance signal and said video content, and
• a plurality of liquid luminous drivers (132) adapted to cooperate with said liquid luminous module (130) and configured to generate a plurality of liquid luminous signals, for enhancement and colour boosting of said images, based on said driver control signals;
o a backlight driver (108) adapted to cooperate with said processor (102) and configured to receive said PWM control signal and generate a backlight control signal based on said PWM control signal; and
o an LED-LCD panel (110) adapted to cooperate with said processor (102) and said backlight driver (108) and configured to receive said backlight control signal, and said plurality of liquid luminous signals and configured to reproduce said images in natural colours, using said backlight control signal and said liquid luminous signals.

2. The system (100) as claimed in claim 1, wherein said set of pre-determined rules includes a group consisting of rules for controlling said backlight driver (108) using YUV settings, controlling brightness, boosting colours and enhancing images.

3. The system (100) as claimed in claim 1, wherein said LED-LCD panel (110) includes:

• a liquid crystal display (LCD) panel (208) having an array of pixels;
• a top polarizer (210) and a bottom polarizer (206) disposed proximal to opposite sides of the LCD panel (208);
• a backlight module (202) configured to emit light through a multilayer reflective polarizer (204) and said bottom polarizer (206) to illuminate at least a portion of said LCD panel (208); and
• said multilayer reflective polarizer (204) disposed between said bottom polarizer (206) and said backlight module (202), and configured to perform polarization recycling.

4. The system as claimed in claim 3, wherein said backlight module (202) comprises an array of liquid luminous light emitting diodes arranged in a matrix, each of said liquid luminous light emitting diodes (300) of said array includes an LED (302) coated with at least two layers of phosphor (304).

5. The system (100) as claimed in claim 4, wherein said at least two layers of phosphor (304) comprise a first layer of red phosphor and a second layer of green phosphor.

6. The system (100) as claimed in claim 4, wherein said at least two layers of phosphor comprise a first layer of green phosphor and a second layer of red phosphor.

7. The system (100) as claimed in claim 3, wherein said polarization recycling includes transmitting light with a first polarization direction (P1) and reflecting light with a second polarization direction (P2) toward said backlight module (202), said backlight module (202) further configured to depolarize the light with said second polarization direction (P2) and re-emit said depolarized light.

8. The system (100) as claimed in claim 1, which comprises a tuner (106), a digital receiver controller (104), a first USB port (120), a second USB port (122), an IR module (124), an audio video receiver (116), a video component receiver (112), a sound amplifier (114) and an HDMI bridge (118), configured to cooperate with said processor (102).

9. The system (100) as claimed in claim 1, wherein said LED-LCD panel (110) is further configured to emit evenly diffused light in all directions to reproduce a complete image thereby providing smooth transition between said images.

10. The system (100) as claimed in claim 1, wherein said liquid luminous module (130) includes a colour management module which employs the International Colour Consortium (ICC) standard.