TWI271581B - Backlight module - Google Patents

Abstract

A backlight module includes a light source, a light guide plate and a frame. The light guide plate includes at least one incidence surface, a bottom surface and a light-emitting surface. The light source is disposed to face the incidence surface. The light guide plate and the light source are housed in the frame. The bottom of the frame has a number of patterned dots that are facing to the bottom face of the light guide plate.

Description

1271581

[Technical field to which the invention pertains] In particular, a backlight module for use in liquid crystal display crying Φ $明-related backlight module. [Prior Art] The liquid crystal display is a non-spontaneously controlled one. By controlling the external well & π m , x first display device, its display main 4

This requires an external source and the corresponding J light = or through, and the beam emitted by the E first and second is directed to the display panel.

The component, 嗲::f should include the light source, the light source cover, the light guide plate and other light; the components of the fixed component moonlight module need a frame to be solidified when assembled. The backlight module 1 includes a light guide plate 21, a reflection sheet 22, and a backlight module disclosed in Japanese Patent Application Laid-Open No. CN1 3 71 0 1 8 A. Light source cover 23,

A light source 24 and a frame 25. The light guide plate 21 has two protruding blocks 211, and the two protruding blocks 211 are disposed opposite to the light guide plate 21. The light source cover 23 has two support members 231'. The two support members 231 respectively have a positioning hole (not shown). The frame 25 includes two positioning frames 25, which are oppositely disposed. The two sides of the two positioning frames 251 are oppositely disposed with positioning portions 253 for receiving the protruding blocks 211 of the light guide plate 21. A positioning hole (not shown) is respectively defined in the opposite positions of the two positioning frames 2 51. The screw 26 passes through the positioning hole of the supporting member 213 and cooperates with the positioning hole of the positioning frame 251 to thereby illuminate the light source cover 2 3 is fixed to the frame 2 5. The light guide plate 21 includes a light incident surface 213, and a light incident surface 213

Page 5 1271581 V. Description of the Invention (2) The adjacent bottom surface 214 and a light exit surface 212 opposite the bottom surface 214, the bottom surface 2 14 is processed through the dot. The light source 24 is disposed opposite to the light incident surface 2 1 3 , and the light source cover 23 can reflect the light projected thereon and enter the light guide plate 21 via the light incident surface 213, thereby fully utilizing the light emitted by the light source 24 Referring to the second figure, a schematic diagram of the distribution of the dots of the light guide plate 2 1 , the bottom surface 21 4 has a uniformly arranged scattering mesh point 2 1 4 1 , the scattering mesh point 2 1 41 is spherical, and the scattering mesh point 2 1 4 1 may also be other Shape or non-uniform arrangement. The reflecting plate 22 is disposed on the side of the bottom surface 214 of the light guiding plate 21, and the light emitted by the light source 24 is transmitted through the light guiding plate 21, scattered by the scattering mesh point 2 1 41 of the bottom surface 2 1 4 and reflected by the reflecting plate 2 2 and then emitted by the light. The surface 2 1 2 is emitted, thereby forming a surface light source with high luminance and good uniformity. The scattering point 2 141 of group 1 is placed on the bottom of the light guide plate. At present, the small and medium size has been discarded, and the scattering point is directly designed on the mold, and the finished product is directly obtained. However, in the actual injection process, the performance of the finished product is too sensitive due to the processing of the process, the performance of the process, the performance of the board, and the different molds (the design performance of the same scattering point is different. To have a reflector, the cost is increased and the compound mask dots are assembled so that The process and structure are more complicated to increase the cost of the backlight module. A backlight module that improves the above disadvantages is actually $

However, it is not easy to control whether the number of shots produced by the printing and re-extracting of the board will be directly emitted. The cost of the backlight module and the method of etching to obtain the condition and the mold to influence the light guiding condition. The backlight module of the finished product needs to be based on the light guide plate. Further, in view of this,

1271581

SUMMARY OF THE INVENTION An object of the present invention is to provide an optical module. The backlight module of the present invention comprises at least one light source, a light guide plate and a frame, wherein the light guide plate comprises at least one light incident surface, a bottom surface adjacent to the light incident surface, and a bottom surface a light exit surface opposite to the bottom surface, the at least one source being disposed relative to the at least one light emitting surface, the light guide plate and the light source being received in the frame, the frame being a high reflectivity material including at least one

a bottom plate and a plurality of frames, wherein the bottom plate is provided with a plurality of scattering dots on a surface of one of the bottom surfaces of the light guide plate. Compared with the prior art, the frame of the backlight module of the present invention is made of a high reflectivity material, and the reflector can be omitted, so that the structure of the backlight module is simplified, thereby reducing the cost. In addition, the scattering dots are placed on the bottom plate of the frame, so that the structure of the light guide plate is simplified and the process parameters are easily controlled, and the cost of the backlight module is further reduced. [Embodiment] The second embodiment is a backlight module of the present invention. The backlight module 2 includes a light guide plate 10, a light source 40, a light source cover 30, and a frame 7B. The light guide plate 10, The light source 40 is housed in the frame 7 〇.

The light guide plate 10 is in the form of a flat plate, and includes a light incident surface 103, a bottom surface 1〇4 adjacent to the light incident surface 103, and a light exit surface 102 opposite to the bottom surface 1〇4. The light guide plate 1 has two protruding blocks ιοί, and the two protruding blocks 110 are disposed opposite to the light guide plate 10. The light source used in the light source 4 is c c F L (Cathode Fluorescence Lamp), which is relatively

Page 7 1271581

The light incident surface 103 is disposed on the other side of the light source 4 〇 opposite to the light guide plate incident surface 103. The light source cover 3 has two support members 3〇1, and the two support members 301 respectively With a positioning hole (not shown). The frame 70 is integrally formed by injection molding to a reflectivity material (e.g., Mi tubishi hpr3000, GE BFL200, etc.), and includes a positioning frame 701, a rear wall frame 7〇4, and a bottom plate 7〇2. The bottom plate 702 is processed by a dot, and has a plurality of regularly distributed scattering dots 7 〇 2 丨. As shown in the fourth figure, the 豸 scattering dot 7 0 2 1 is a spherical groove. The two positioning frames 7 are opposite to each other, and the inner side is oppositely provided with a positioning portion 7 〇 3, and the positioning portion 7 〇 3 is a groove structure which is equivalent to the shape and size of the protruding block 丨〇 1 of the light guide plate 。. A positioning hole (not shown) is respectively formed at the end of the frame of the frame of the second frame, and the screw 6 is inserted through the positioning hole of the support member 301 to cooperate with the positioning hole of the positioning frame 7〇 to thereby illuminate the light source cover 30. Fixed to frame 7〇. When the backlight module 2 is in operation, the light source 40 emits light, and the light source cover 3 反射 can reflect the light projected thereon and enter the light guide plate through the light entrance surface 丨〇 3 to fully utilize the light emitted by the light source 40. The light emitted from the bottom surface 104 reaches the bottom plate 70 2 and is partially scattered by the scattering dots 7021 on the surface of the bottom plate 702 to enter the light guide plate 1 , and the remaining portion is reflected by the bottom plate 7 〇 2 into the light guide plate 10 . The light that is scattered and reflected back is emitted through the light exiting surface ’ 2, so that the function of the backlight module 2 to convert the line source into a surface light source is realized. Since the frame 70 of the backlight module 2 is made of a material having a high reflectance with a reflectance higher than 95%, the reflector can be omitted, and the structure of the backlight module 2 can be simplified, thereby reducing the cost. In addition, the scattering dots 7 〇 2丨 are placed on the bottom plate of the frame.

Page 8 1271581 V. Inventions (5) 702 on the "light guides!" The structure of the crucible is simplified and the cost of the process module backlight module 2 is further reduced. I can easily control not only the bottom of the frame of the backlight module of the present invention is only a spherical groove, but also can be a v-shaped concave #1 shot net dot ^ well-known shape 'and the dot is not limited to even distribution, / other trade secrets, Other distributions such as gradual distribution or random distribution can also be used for the light-emitting surface of the backlight module of the invention, and the diffusion plate and the Z-party film are also used to meet the high brightness and Sentence: set - seeking. The diffuser plate and the brightness enhancing sheet are required to be assembled and the light guide plate. 』一人谷在框 The light guide plate of the backlight module of the present invention can also be wedge-shaped, and the corresponding light guide plate can also adopt two light sources, and the phase library can be turned over to ten-plate shape. The corresponding structural changes can be achieved by conventional techniques. The frame of the backlight module of the present invention can also be a plastic frame, which is reflective and can prevent light leakage. The lamp used in the light source can also be a plurality of light-emitting diodes. In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and those skilled in the art will be able to make equivalent modifications or variations in accordance with the spirit of the present invention. It should be covered by the following patent application.

Page 9 1271581 BRIEF DESCRIPTION OF THE DRAWINGS The first figure is an exploded perspective view of a prior art backlight module. The second figure is a schematic diagram of the distribution of the dots of the light guide plate shown in the first figure. The third figure is an exploded perspective view of the backlight module of the present invention. The fourth figure is a schematic cross-sectional view of the frame shown in the third figure along A-A. [Main component symbol description]

Page 10 Backlight Module 2 Frame 70 Light Source 40 Base Plate 702 Light Source Cover 30 Positioning Frame 701 Light Guide Plate 10 Rear Wall Frame 704 Projection Block 101 Scattering Dot 70 2 1 Light Exit Surface 102 Screw 60 Light Incidence Surface 103 Support Member 301 Bottom Surface 104

Claims (1)

1271581 VI. Patent application scope 1. A light source module with at least one light guide module; a plate, adjacent to a bottom frame, the above; wherein, _ set, plural set 2. If the application is integrated 3. For example, if you apply for a network of outlets, the application is for a colder shade. 6. If the application is for a multiple of 7. If the application is included in the expansion of the frame 8. If the application board accommodates at least the frame of the frame, the number of scattering patents is formed. Patent patent scatter convex patent patent scatter concave patent 极 萤 专利 专利 专利 专利 范 范 , , , , , , , , , , , , , , , , , , 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利 专利a light-emitting surface; the light guide plate and the at least one light source are received in the frame, and the light source is made of a high-reflectivity material with respect to the at least one light incident surface, and includes at least one bottom plate and the bottom plate adjacent to one of the bottom surfaces of the light guide plate A mesh point is provided on the surface. The backlight module of claim 1, wherein the frame comprises the backlight module of item 1, wherein the scattering block. The backlight module of item 1, wherein the scattering slot. The backlight module of item 1, wherein the light source is a light tube. The backlight module of item 1, wherein the light source body. The backlight module of claim 1, further comprising the diffuser plate above the light guide plate. The backlight module of item 7, wherein the diffusion is in the middle Page 11 1271581 VI. Patent application scope 9. If it is 10. If the film is 11. If the board is 12. If the board is 13. If it is 14. If it is 15. If the application for the application is increased, the application for the application is a flat application for the wedge application. The backlight module of the eighth application of the patent application of the plastic application rate is further provided with a sequin which is located above the diffusion plate. The backlight module of claim 9, wherein the backlight is highlighted in the frame. The backlight module of claim 1, wherein the light guide plate has a shape. The backlight module of claim 1, wherein the backlight module of the fifth aspect of the invention is further provided with a source cover. The backlight module of claim 1, wherein the frame frame. The backlight module of claim 1, wherein the high reflectivity is higher than 95%. Page 12