TW201106065A - Parallel LED light guide design used for backlight module - Google Patents

Abstract

The present invention provides a parallel LED light guide design used for backlight module. By means of the disclosed design to provide the parallel light-guide plate using LED as the lamp source, the light beam emitted from the LED lamp source can be made to effectively hit onto the light-guide plate after reflection through the paraboloid, and the micro-prism structure is designed on the bottom of light-guide plate, so that the incident LED light beam can be perpendicularly and uniformly emitted out of the light-guide plate. The disclosed design can be used in the illumination of backlight module for the general TFT-LCD panel or the general plane illumination, thereby achieving the purposes of the high-efficiency illumination with energy saving and carbon-dioxide reduction by means of using the LED with low power as the lamp source.

Description

201106065 VI. Description of the Invention: [Technical Field] The present invention relates to a parallel light guide plate using LED as a light source, and provides an LED parallel light guide plate design for an optical module, thereby designing a LED light source The emitted light, after being reflected by the paraboloid, is effectively and parallelly driven into the light guide plate' and a microscopic structure is designed at the bottom of the light guide plate, so that the incident LED light can be vertically and uniformly emitted upward from the light guide plate.

[Prior Art]

With the world's greenhouse effect and energy crisis, how to save on the use of existing energy and how to use alternative energy has become a topic of great concern to the world's global vocabulary _, company number and school units have begun to cooperate with the government The policy of saving energy and reducing carbon consumption has also led to the rapid development of related LED light source applications. The traditional backlight module, such as the patent number of the Intellectual Property Office of the Ministry of Economic Affairs of the Republic of China, is published in the patent number of the 公告 Μ 曰 曰 曰 曰 曰 曰 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光 背光The light guide plate guide wire structure of the conventional technology=the main structure includes the cold cathode camplight lamp, the light person surface 221, the light guide plate, and the light guide plate microstructure. The line is thin. 21 illuminates, and the line (4) that is sent to the camp light is reduced to enter the light guide plate 223' and the light line is uniformly refracted by the light guide plate microstructure 224 out of the light guide plate. Ding. 201106065 However, the light source of the above-mentioned conventional backlight module is a traditional fluorescent light source, and the inside of the lamp tube contains toxic mercury vapor, which is likely to cause mercury pollution if the lamp tube is damaged. Compared with LED light sources, LEDs have advantages over traditional cold cathode tubes in terms of color, brightness, lifetime, power consumption, and environmental protection requirements, so it will be just a matter of course. In view of the above, it is necessary to provide a backlight module for LED parallel light guide plate design to replace the conventional cold cathode fluorescent tube backlight module. SUMMARY OF THE INVENTION The present invention provides a LED parallel light guide plate design for a backlight module, whereby the light emitted by the LE:D light source can be effectively driven into the light guide plate and reflected at the bottom of the light guide plate after being reflected by the paraboloid. The tiny 稜鏡 structure is designed to allow the incident LED light to be emitted vertically and uniformly out of the light guide. In order to achieve the object of the present invention, the present invention provides a backlight module for LEDs that illuminate the light guide plate design. This design can effectively emit light emitted by the light (four), and the light reflected by the LED is reflected and guided to the guide by the parabolic reflector. In the light plate, together with the parallel structure of the parallel light guide plate, the light in the parallel light guide plate is vertically reflected upward, so that the LED light of the human light can be vertically and uniformly emitted. The invention provides a method for effectively turning the LED for back-bending, thereby providing illumination for the back-to-back LED-parallel light guide. Compared with the light source of the backlight module of the driving technology, the lamp source is a traditional glory light source, and the lamp tube contains toxic mercury vapor inside, and the wire is easily damaged when the wire is damaged, and the invention uses LED as a backlight source. Color, brightness, longevity, power consumption, 201106065 and ring material are all superior to traditional cold cathode f; the design of parabolic reflector improves the efficiency of light incident on the light guide 'with the reflection of triangular micro-structures' The light can be vertically and uniformly emitted upward from the light guide plate, which can greatly improve the illumination efficiency of the backlight module. 201106065 [Embodiment] Please refer to the second figure, the LED parallel light guide plate of the backlight module of the present invention is designed to effectively convert the light emitted by the LED light source into the light guide plate after being reflected by the paraboloid, and The bottom of the light guide plate is designed with a small 稜鏡 structure, so that the incident LED light can be vertically and uniformly emitted from the light guide plate.

The backlight module uses LED parallel light guide plate design as an example. [ED light source 31 is placed away from the parabolic focus 33. The light of the LED reflects the light to the microstructured light guide plate 34 and the reflective barrier via the parabolic reflector surface 32. 35. The light of the LED light source 31 directly reflects the light to the light 36 of the microstructured light guide plate 34 via the parabolic reflection surface 32, and the light 37 that is secondarily reflected by the reflective barrier 35, respectively, via the direct reflection surface 38 and the secondary reflection Face 39, which reflects the light vertically upwards. As stated on the silk, the invention meets the requirements of the invention patent, so the patent application is filed according to law. The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiments, and those skilled in the art will be able to make equivalent modifications or the like in accordance with the spirit of the present invention. , should be covered in the scope of the following claims. 201106065 [Simple description of the diagram] The first diagram is a schematic diagram of the structure of a cold cathode light guide plate of the prior art. The second figure is not intended for the design of the LED parallel light guide plate for the backlight module of the present invention. [Main component symbol description]

Cold cathode fluorescent lamp 21 Light incident surface 221 Parallel light guide plate 223 Parallel light guide plate microstructure 224 LED light source 31 Parabolic reflection surface 32 Parabolic focus 33 Microstructure light guide plate 34 Reflective baffle 35 Direct reflection light 36 Secondary reflection by baffle Light 37 direct reflection surface 38 secondary reflection surface 39

Claims (1)

201106065 VII. Patent application scope: 1. A LED parallel light guide plate design for backlight module, which can design the light emitted by the LED light source to be effectively driven into the light guide plate after being reflected by the paraboloid, and at the bottom of the light guide plate. The tiny 稜鏡 structure is designed to allow the incident LED light to be emitted vertically and uniformly out of the light guide. 2. If the L]ED source as described in claim 1 is placed away from the parabolic focus, the light from the LED reflects the light through the parabolic reflector to the microstructure • the light guide and the light from the reflector's LED source. The light that is directly reflected by the parabolic reflecting surface to the microstructured light guide plate and the light that is reflected twice by the reflective baffle are directly reflected upward by the direct reflecting surface and the secondary reflecting surface. 3. If you apply for the full-scale (4) parabolic reflector surface, the material can be made of the material ' or ABS and PC plastic material, and the aluminum reflective film on the reflective surface. 4. For the design of the bottom of the light guide plate as described in item 1 of the scope of the patent application, the surface of the light reflecting light is coated with a reflective film with high reflectivity. 5. The reflective film of high reflectivity as described in item 4 of the patent application may be made of metal of Ilu, gold, silver or copper. 6. If the design of the fourth retire of the fourth retire is based on the tiny 稜鏡 design, the design angle is such that the reflected light is vertically upward. 7. For example, the anti-dimensional plate described in item 2 of the special purpose is a reflective film with high reflectivity. 8) The high reflectivity reflective film according to claim 7 of the patent application, which also comprises a high reflectivity reflective film as described in claim 4, 201106065, which may be made of Ilu, gold, silver or Copper metal or flat mirror.