FORM 2
THE PATENT ACT 1970
&
The Patents Rules, 2003
COMPLETE SPECIFICATION
(See section 10 and rule 13)
1. TITLE OF THE INVENTION:
"Battery Operated Backup Light Source for Endoscope Application"
2. APPLICANT
(a) NAME: Pregna International Limited
(b) NATIONALITY: Indian Company registered under the
Provisions of Companies Act, 1956
(c) ADDRESS: 13, Suryoday Estate,
136, Tardeo Road,
Mumbai -400034, M.S. India
3. PRREAMBLE TO THE DESCRIPTION

COMPLETE
The following specification particularly describes the invention and the manner in which it is to be performed.

Battery Operated Backup Light Source for Endoscope Application
Field of invention
The present invention relates to light source for endoscopic application, and more particularly, to backup light source for surgical and industrial endoscopic applications.
Background of the invention
Existing light source used for endoscopic applications is a halogen bulb based light source. However, special light sources such as xenon lamps are also used. All these light sources may be used with a spare lamp as backup. However, these light sources are very difficult to run on internal battery. Further, these light sources produce a lot of heat which goes into the endoscope. Therefore, excessive filters are required to remove the heat therefrom. Also, these filters cause a drop in light quality.
The conventional design of the halogen based light source provides warm white color light. However, the light intensity of the halogen based light source is limited and the halogen based light source is very sensitive to shocks. Further, the power consumed by the halogen based light source is very high. Hence, even if an internal battery is provided, the backup time is very less. Furthermore, the temperature generated on the lamp holder is also very high. For example, in some cases the unit internal temperature can be more than 40 degree C. Also halogen light source do not always give proper white light.

Objects of the invention
An object of the present invention is to provide a light source for an endoscope having lower power consumption, longer life, and more rugged structure.
Another object of the present invention to provide a light source for an endoscope which eliminates use of fiber optical cable, capable of running on a battery for long duration and having low heat generation.
Yet another object of the present invention is to provide a light source which is capable of emitting various types of white colour, such as warm white, neutral white, cool white and the like.
Statement of the invention
According to the present invention, there is provided a lamp holder for holding light source in an endoscope, the lamp holder comprising:
a cylindrical hollow body having upper portion and lower portion, the upper portion having an opening adapted for connecting to the endoscope;
a heat sink mounted on a spring within the cylindrical hollow body;
a light emitting diode mounted on the heat sink, wherein the heat sink dissipates the heat generated by the light emitting diode; and
a plate mounted over the light emitting diode for maintaining the gap between surface of the light emitting diode and tip of the endoscope.

Typically, wherein the cylindrical hollow body is provided with slots on sides
thereof for ventilation.
Typically, wherein the light emitting diode is powered by a battery.
Typically, wherein the light emitting diode is mounted on the heat sink with the help of silicone heat sink paste and screws.
Brief description of the drawings
Figure 1 shows a high power light emitting diode lamp holder according to the present invention; and
Figure 2 shows a super high power light emitting diode lamp holder according to an embodiment of the present invention.
Detail description of the invention
The foregoing objects of the invention are accomplished and the problems and shortcomings associated with the prior art techniques and approaches are overcome by the present invention as described below in the preferred embodiment.
The present invention provides a light source for endoscopic application having lower power consumption, longer lamp life, more rugged structure. Further, the light source for the endoscopic application eliminates use of fiber optical cable, capable running on battery for long duration and has a low heat generation. Furthermore, the light source is capable of emitting various types of white colour, such as warm white, neutral white, cool white and the like.

The present invention is illustrated with reference to the accompanying drawings, throughout which reference numbers indicate corresponding parts in the figure. These reference numbers are shown in bracket in the following description.
Referring now to figure 1, there is shown a light emitting diode lamp holder according to the present invention. More specifically, figure 1 shows a high power lamp holder (100).
The lamp holder (100) includes a cylindrical hollow body (10), a heat sink (20), a light emitting diode (30) and a plate (40). The cylindrical hollow body (10) has an upper portion (12), a lower portion (14) and side portion (16). The upper portion (12) is provided with an opening (18) adapted for connecting to the endoscope (not shown). Specifically, the upper portion (12) is an adapter for connecting to a specific endoscope. More specifically, the opening (18) is directly coupled to the endoscope's light entry point.
The side portion (16) of the cylindrical hollow body (10) provides casing to the cylindrical hollow body (10). The cylindrical hollow body (10) includes a heat sink
(20).
Specifically, the heat sink (20) is mounted on a spring (22) within the cylindrical hollow body (10). Further, the light emitting diode (30) is mounted on the heat sink (20). The heat sink (20) dissipates the heat generated by the light emitting diode (30). The light emitting diode (30) is a special type of power light emitting diode generating high lumens of light in very small size of light emitting diode. The light emitting diode (30) is so fitted that maximum light reaches to the tip of the

endoscope without the endoscope touching or damaging the light emitting diode (30). Specifically, the light emitting diode (30) is mounted on the heat sink (20) with the help of silicone heat sink paste and screws. However, it may be evident to those skilled in the art to use any other suitable mechanism for mounting the light emitting diode (30) on the heat sink. The light emitting diode (30) is powered by a battery (not shown).
Further, the lamp holder (100) may include backup unit auto switch over facility incorporated therein, in which switching can take place from mains supply, an internal battery and an external battery. The lamp holder (100) may include customized electronic circuit for adjusting the electric supply to achieve light intensity of the fight emitting diode (30) from minimum to maximum level. The lamp holder (100) is highly efficient as power required is very low and output light performance is very good.
Furthermore, the lamp holder (100) includes a plate (40) mounted over the light emitting diode (30) for maintaining the gap between surface of the light emitting diode (30) and tip of the endoscope (not shown). This ensures that highest quantity of light enters the endoscope and still the light emitting diode is protected. Specifically, the inner face of the plate (40) is smoothened to act as additional concentrator for light.
Referring now to figure 2, which shows a super high power light emitting diode lamp holder (200) according to an embodiment of the present invention. The lamp holder (200) includes a side portion (16) having slots (24) for ventilation. The slots (24) are provided for heat dissipation of super high power light emitting diode (30) as super high power light emitting diode (30) emits higher power and hence the

battery life is reduced. Also, the super high power light emitting diode (30) has more heat output and hence needs more ventilation in form of slots (24) in the lamp holder (200). Further, the slots (24) provide additional cooling by natural ventilation.
The lamp holder (100, 200) is specially designed from steel which allows good ventilation and is corrosion resistant. However, it may be evident to those skilled in the art to use any other metal which provides good ventilation and is corrosion resistant. Further, the lamp holder (100, 200) can be autoclaved to make it sterile.
The lamp holder (100, 200) may have variations in type of light such as warm white, neutral white, cool white and the like. Alternatively, the lamp holder (100, 200) may be classified on the basis of power consumed i. e. high power, super high power, ultra high power and the like.
Advantages of invention
The present invention provides a lamp holder as light source for endoscopes which can work as a backup with very good quality white light using no fiber optic cable, with long time running on battery connectable to almost all endoscopes in market with more than 10,000 hours of no need to change lamp.
It is to be understood that the present invention is not limited in its application to the details of the construction and to the arrangement of the components as mentioned in the above description or illustrated in the drawings. However, it is to be taken as the preferred example of the invention and that various changes in the

shape, size and arrangement of parts considering the space constraint may be resorted to without departing from the spirit of the invention. The invention is capable of other embodiments and of being practiced and carried out in various ways. Also, the terminologies used herein are for the purpose of description and should not be regarded as limiting.

We Claim
1. A lamp holder for holding light source in an endoscope, the lamp
holder comprising:
a cylindrical hollow body having upper portion and lower portion, the upper portion having an opening adapted for connecting to the endoscope;
a heat sink mounted on a spring within the cylindrical hollow body;
a light emitting diode mounted on the heat sink, wherein the heat sink dissipates the heat generated by the light emitting diode; and
a plate mounted over the light emitting diode for maintaining the gap between surface of the light emitting diode and tip of the endoscope.
2. The lamp holder as claimed in claim 1, wherein the cylindrical hollow body is provided with slots on sides thereof for ventilation.
3. The lamp holder as claimed in claim 1, wherein the light emitting diode is powered by a battery.
4. The lamp holder as claimed in claim 1, wherein the light emitting diode is mounted on the heat sink with the help of silicone heat sink paste and screws.
5. The lamp holder substantially as described in the description with reference to the accompanying drawings.