TWM243656U - Surface light source device - Google Patents

Description

M243656

The amendments are related to a surface light source device, and more particularly to a surface light source device with low cost and high brightness. [Previous technology] LCD displays are mainly used in various information, communication and consumer products

For example, personal computers, LCD TVs, mobile phones, video phones, PDAs ::: LCD panels do not have light-emitting characteristics. They need to provide uniform and high-brightness planar light in the surface light source device /, β, in order to obtain good visual effects. At present, the surface light source device of the prior art is shown in the first figure. The surface light source 10 includes a light guide plate i, a reflective plate located on the bottom surface of the light guide plate 2 and a diffuser plate 3 where the light exit surface is equal to ¥ light plate 1. 、 Light source 6 located on the side of the light guide plate 丨, the light source cover 7 and the stern plates 4, 5 arranged vertically on the top of the diffuser 3, work dead, and the light beam emitted from the light guide plate 1 will be emitted when it passes through the diffuser plate 3. The policy is to generate uniformly emitted light from the car, and the prism plates 4 and 5 can condense the light emitted from the diffusion plate 3 to increase the brightness of the emitted light, thereby increasing the brightness of the LCD. However, there are many components in the surface light source device 10, which not only increases: the thickness of the surface smi0 'and the components are glued with a transparent resin; energy loss occurs during the layer to reduce the brightness of the emitted light display. In addition, the price of the panel 4 and 5 is complicated and the group 5 mode is complicated. Therefore, the cost of the surface light source device 10 is higher than the surface light source device of the light emitting surface of the plate, such as: On: 2 brush lines are set in the light guide --- The country does not. The area light source

Page 4 China Mainland Real Estate CN9 announced on May 10, 2000, No. 92 1 42 11. No. 3 reveals a kind of trapezoidal birthplace M243656 _— Case No. 9220 邡 11__ year month di: __ V. Creation instructions (2) Set 20 includes a light guide plate 21, a reflection plate 22, a light source 24, and a light diffusion film 23, and a plurality of ladder-shaped printing lines 2 6 1 are provided on the light exit surface 2 6 of the light guide plate 21. It can generate a light-collecting function on the light guide plate 21, thereby improving the brightness of the entire surface light source device 20. However, as far as printing is concerned, since light can only collect light in one direction along the direction of the printing line, the utilization of light is low, which affects the brightness of the liquid crystal display. In view of this, it is necessary to provide a low-cost, high-luminance surface light source device. [New content]

The purpose of this creation is to provide a low-cost, high-brightness surface light source device. The surface light source device of this creation includes a light guide plate and at least one line light source. The light guide plate includes at least one light incident surface for receiving light, a light exit surface adjacent to the light incident surface, and a light exit surface. On the opposite bottom surface, the light exit surface is provided with an array of concentric circles or elliptical grooves, and the line light source is disposed on the light incident surface side of the light guide plate.

Compared with the previous technology, the effect of this creation lies in that: the surface light source device of this creation is arranged on the light exit surface of the light guide plate. A groove array is provided on the light guide plate, which can omit the cymbals and the light guide plate. Can not reduce components, simplify two, and avoid light energy loss caused by light passing through the glue layer; In addition, because the grooves: = columns are concentric circles or elliptical groove arrays, which can enhance the horizontal and vertical directions from linear light sources It has a two-way light collection effect, so it has this structure = the surface light source device has a better [persistence method] ^

M243656 j 92202611 a Correction V. Creation instructions (3) A linear light source 53 located on the side of the light guide plate 30, and a reflective plate 52 located on the lower side of the light guide plate 30. The linear light source 53 may be a cold cathode fluorescent lamp. Referring to the fourth figure, the light guide plate 30 includes a light incident surface 31 for receiving light, a linear light source 53 is disposed on one side thereof, a light exit surface 32 for guiding light exit and intersecting the light incident surface 31, and The light exit surface 32 is opposite to the bottom surface 33, and the reflection plate 52 is disposed below it. Please refer to the fifth figure together. A concentric circular groove array 3 2 1 is provided on the light exit surface 32, which may also be a concentric oval groove array. The cross-section of each groove is V-shaped, and can also be trapezoidal, arc-shaped, oval-shaped, or the like. The groove array 3 2 1 can be formed by injection molding with the light guide plate 30. It can also be manufactured by chemical etching bite method, laser direct writing method, precision mechanical engraving method, photolithography method, and V-Cut method. The bottom surface 33 is provided with a plurality of scattering points 331, and the scattering point structure may be a point shape, a square shape, a spherical shape, a cylindrical shape, a cube shape, or a pyramid shape. The complex scattering dots 331 may be integrally projected by injection molding of the light guide plate, or may be printed by a printing method. The scattering points 3 3 1 of the bottom surface 3 3 are arranged in an increasing direction in a direction away from the light incident surface 3 1. The closer to the light source 5 3, the smaller the size and the smaller the distribution; the further away from the light source 53, the larger the size. The larger and denser the distribution. The light exit surface 3 2 of the light guide plate 30 is provided with a concentric circular V-shaped groove array 3 2 1, which has a bidirectional light collection effect in the horizontal direction and the vertical direction. Therefore, the light beam from the line light source 53 is emitted through the light exit surface 3 2 Both the horizontal direction and the vertical direction have a good light-collecting effect. Therefore, the surface light source device 50 has a high light-emitting brightness. Please refer to the sixth figure. The difference from the third figure is that two light sources 6 3 and 6 4 are provided on the light guide plate 61 bis opposite to the light incident surface 6 5. The scattering points 6 6 1 of the bottom surface 66 of the light guide plate 61 are arranged in an increasing direction away from the light incident surface 65, and the closer to the light sources 6 3, 6 4 is, the smaller the size and the more sparsely distributed; from the light source 6 3.

Page 6 M243656 Case No. 92202611 _ Ά Amendment 5. Creation instructions (4) and the denser the distribution, the light guide plate 61 is the middle and the densest. The light emitted by the devices 50 and 60 is more uniform, and can be viewed at). The farther the 64 is, the larger its size is. The distribution of the scattering points is the largest. In addition, a diffuser (not shown) is added to the light exit surface side of the surface light guide plates 30 and 61. The light guide plates 30 and 61 are matched with different light source positions, and their shapes can be flat, wedge-shaped, or triangular. To sum up, this patent application was created. However, in terms of formulas, the equivalent modification of the techniques familiar with this case is changed to meet the requirements of the new patent. Mai Yifati c is the best implementation of this creation. Tb is relying on the new type of this case. Within the scope of the patent made by Jia Spirit.

M243656 Case No. 92202611 Modification Brief Description of the Drawings The first drawing is a schematic plan view of a prior art surface light source device. The second figure is an exploded perspective view of still another prior art surface light source device. The third figure is a schematic plan view of the original surface light source device. The fourth diagram is a schematic side view of the light guide plate shown in the third diagram. The fifth figure is a top view of the light guide plate shown in the third figure. The sixth diagram is a schematic plan view of the second embodiment of the original surface light source device. Symbol description of the surface light source device 50, 60 light source 53, 63, light guide plate 30, 61 light incident surface 31, 65 light exit, surface 32 bottom surface 33, 66 Groove array 321 reflector 52 scattering points 331, 661

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Claims (1)

M243656 Case No. 92202611 _η Revision 6. Scope of patent application 1. A surface light source device-a light guide plate, including a bottom surface facing the incident light; at least one of them is arranged in it 2. Rushen array 3. Rushen In the column 4. If the application surface is set as 5 • As the application radiation point 6 • As the application radiation point 7 • As the application light board 8. If the application of light from the light source, the light is emitted. The patent scope of the groove is convex or concave. The structure of the patent scope can be round. The size of the patent scope is uniform along the patent scope of the flat plate or the patent scope. It includes: including at least one for receiving A light incident surface of incident light, an adjacent light exit surface, and a linear light source on one side of the light incident surface corresponding to the light exit surface; the surface is provided with an array of concentric circles or oval grooves. The surface light source device according to item 1, wherein a cross section of the groove is V-shaped. The surface light source device according to item 1, wherein the groove array has a trapezoidal or arcuate or elliptical cross section. The surface light source device according to item 1, wherein the ground-shaped scattering point. The surface light source device according to item 4, wherein the scatter is spherical, cylindrical, cubic, or pyramidal. The surface light source device according to item 5, wherein the divergence increases in a direction away from the light source. The surface light source device according to item 1, wherein the guide is wedge-shaped or triangular. The surface light source device according to item 1, wherein the surface includes a diffusion sheet that diffuses the output from the light exit surface. Page 9