TWM266469U - Reflection sheet structure for direct backlight module with enhanced reflection uniformity and brightness - Google Patents

Description

M266469 4. Creation Description (1) [Technical Field to which the New Type belongs] This creation relates to a reflection sheet structure of a direct-type backlight module that improves the uniform brightness of reflection, especially the reflective sheet of a direct-type backlight module to increase The uniformity of light reflection. [Previous technology] Press. Generally, the backlight source is used to provide the light source required for the LCD display image. As the size and structure of the LCD display are different, different types of backlight modules are required. As long as the display is illuminated with a point light source, the display of a mobile phone in a communication product is projected with such a point light source, and it does not require large quality of the image and uniformity of the light source. Generally, medium-sized displays such as notebook computers and personal desktop computers use line light sources to meet the required brightness, and larger size liquid crystal displays must use a larger number of wires. light source. As the size of the display increases, the importance of uniform brightness is more prominent, which leads to the design problem of the backlight module. With different positions of the light source in the backlight module, the backlight module usually has a photometric type, a direct type and the like. Referring to the first figure, the design of the edge-lit backlight module 1 ′ generally includes an outer layer plate 10 ′, a prism sheet 11 ′, a diffusion plate 12 ′, and a light guide plate 13 which are sequentially stacked from top to bottom. And a reflecting plate 15 ', and an existing light source 1 4' is provided at the side end of the light guide plate 13 ', and the light guide plate 1 3' is used to direct the light of the light source 14 toward one side of the diffuser plate 12 'through a predetermined propagation process. Diffusion and emission, and then pass through the aforementioned cymbal plate 11, thereby providing the

Page 5 M266469 _- —-_______________ — --- " * ^ " —___________— 4. Creative Instructions (2) The light required by the display. The cymbal 1 ′ 1 may be single, double or non-used according to design requirements. The surface of the cymbal 1 ′ 1 is preset with a plurality of parallel grooves, and the arrangement of the grooves may be vertical or horizontal. 1 0 ′ The outer layer plate may be a diffusion plate, a protection plate, or a brightness enhancement plate. The light source 1 4 ′ of this type of edge-lit backlight module Γ is located at the edge of the light guide plate 1 3 ′, and transmits light through the light guide plate 13 ′, and cooperates with the reflective plate 15 provided at the bottom of the light guide plate 13 to make the light upward. Reflection. The advantage of this edge-lit backlight module Γ is that it is not easy to clearly recognize the position of the light source 14 ', but its brightness is poor. Referring to the second figure, the design of the general direct type backlight module omits the complicated and expensive optical sheets such as the light guide plate and the cymbal of the edge-lit backlight module. The light source 14 is provided on the reflective plate 1 5 Between the diffuser plate 12 and the diffuser plate 12, the reflection effect provided by the reflective plate 1 5 ′ is used to transmit light through the diffuser plate 12 to the liquid crystal display disposed above the backlight module 丨 and directly above the liquid crystal display using the reflective plate 15 ′. The light source 14 located above it reflects the light upwards, so that the display can obtain better brightness, but it makes it easier to distinguish the position of the light source, that is, the light source 14, the brightness of the position is significantly less than other bright. Therefore, how to make the light source of the direct type backlight module uniform through the optical design of the reflection plate 15 is a major issue. Referring to the third figure, taking the reflection plate 15 of the direct type backlight module as a horizontal plate and having a plurality of light sources 14 as an example, the position of the diffuser plate 12 ′ corresponding to the square of the light source 14 will be the brightest, and two The middle part of the adjacent light source 14 is 16, and the vicinity is the darkest. '' The reason is that the middle part of the two adjacent light sources 14 is 16 and the farthest from the light source 14 is the light intensity of the light source 1 4 that can be received will be lower. Weak and flat

M266469 Fourth, the creative description (3) f is the opposite, the plate ^ 'only provides a reflection function, so the light projected under the light source η does not have the effect of converging to the adjacent light source 14, middle 6 and nearby, naturally cannot be strengthened Real estate near the middle 丨 6. The fourth picture shows the example of the reflection of the direct-lit backlight module ^ 5, which is a zigzag plate. The reflection plate 15 'has a plurality of reflection units 151 corresponding to the line light sources 14', respectively. A reflection unit 151 has two inclined plate portions 152 extending forward and backward and connected to each other. The inclined plate portion 152 is formed by extending downward and upward from directly under the light source 14 respectively. The design of such a reflection plate 15 , Can directly reflect the downward light emitted by the light source 1 4 ′ to the position close to the light source 14 ′, so it can increase the brightness, but it does not help the uniformity of the brightness. 1 in the middle, near the brightness. Regarding the various designs of the direct type backlight module mentioned above, it can be seen in many patent cases, such as U.S. Patent 5,567, 042, 5,479,328, 5, 134, 553, 20020057405, 20020039292, 4,425,604, 6,407,781, 5,253, 1 5 Bu 6,0 95656, etc., various designs have different structural configurations and efficacy requirements, and there are differences in the difficulty of manufacturing. Therefore, how to propose a novel reflection sheet structure of a direct-type backlight module that can improve the uniformity of reflection and not only can improve the shortcomings of the traditional inability to strengthen the brightness near the middle of adjacent light sources. It has been used for a long time. The author earnestly hopes that the creator is here, and the creator is based on many years of research, development, and sales practice experience in related products, thinking about and improving ideas, and lacking his personal expertise.

Page 7 M266469 IV. Creative Instructions (4) After researching design and special discussions, finally researched an improvement of the structure of the reflection sheet of a direct-lit backlight module that improves the uniform brightness of reflection, which can solve the above problems. [New content] The main purpose of this creation is to provide a reflective sheet structure of a direct type backlight module that improves the uniform brightness of reflection. It uses a reflective sheet to make a direct type backlight module increase the uniform brightness of a reflected light. The secondary objective of this creation is to provide a reflective sheet structure of a direct type backlight module that improves the uniform brightness of the reflection. It uses a connection sheet to connect a plurality of light sources to the reflection sheet because the connection sheet is connected to the reflection sheet. Has a slope to increase the uniform brightness of the reflected light. In order to achieve the above-mentioned purposes and effects, the creation is a reflection sheet structure of a direct-type backlight module that raises the brightness of the south reflection, which reveals the structure of a reflection sheet, which is based on the distance from the light source. The slope of the light source is from large to small to improve the uniformity of the reflected light. Furthermore, there are connecting pieces on both sides of the light source and the reflecting sheet. The connecting piece has an angle when connected to the reflecting sheet, and passes through the The design of the slope ^ provides the light source [Implementation] In order to make your reviewers have a better understanding and understanding of the structural special effects of this creation, I would like to provide a better and detailed explanation, as explained below: This creation is an improvement exercise Know the disadvantages of the reflective sheet,

Page 8 Examples of implementations and techniques

M266469 ^ --------------- ----- 4. In the creative instructions (5), the reflection sheet of the backlight module cannot strengthen the immunity near the middle of the adjacent light source. 'Neither the jagged reflection sheet nor the parabolic reflection sheet can increase the brightness in the middle. Because the direct type backlight module has a plurality of light sources', the two light sources must have a middle, and the brightness at the middle must be the lowest. 'At this time, the reflection light at the bottom of the reflection sheet located at the middle must be the weakest', so its reflection light cannot be uniformized, so this creation provides a structure of a reflection sheet 'to increase the intensity of the reflection light in the middle and Evenness.

Please refer to the fifth figure, which is a schematic diagram of the structure of a reflective sheet of a preferred embodiment of this creation. As shown in the figure, this creation is a reflective sheet of a direct-type backlight module that improves the reflection The main structure of the direct-type backlight core group 1 includes a reflecting plate 10, a plurality of light sources 20, and a diffuser plate 30. The plurality of light sources 20 are located above the reflecting plate 10. The diffusion plate 30 is located above the plurality of light sources 20, and the reflection sheet 10 has a jagged surface 12, each of the jagged surfaces of the jagged surface 12 has a different slope relative to the distance from the light source, When the reflecting plate 10 is farther from the light source 20, the slope of the dentate surface 12 is larger. When the reflecting plate 10 is closer to the light source, the slope of the jagged surface 12 is smaller. 1 > 0 2; Furthermore, when the reflecting plate 丨 〇 is located below the light source 2 0, the reflecting plate 10 reflects the reflected light directly, but the direction of the reflected light will avoid the light source, So the shape of the reflecting plate right below the light source at this time A circular or elliptical surface or a surface of an aspherical surface or a triangular surface, see FIG simultaneously sixth light path of the reflective sheet of the present embodiment one of the authoring system of FIG seventh and eighth FIG 'preferred embodiment

Page 9 M266469 IV. Creative Instructions (6) Schematic diagram; as shown in the figure, the reflective sheet 10 has a jagged surface 12 and the slopes are different. The reflective sheet 10 is the light source when it is far away from the light source. At the middle point 22, the light intensity of the light source 20 is the weakest at this time. Because the jagged surface 1 2 of the reflection sheet 10 of this creation is at the middle point 22, the angle is the largest, so that the The light source 1 0 of the light source 2 0 reflects one of the light rays 14 reflected by the reflection sheet 10 to make it reflect upward, and when it is located below the light source 20, the reflection plate 10 is designed to make the reflected light 1 4 The light source 20 can be avoided. Furthermore, please refer to the ninth figure, which is a schematic diagram of the structure of the reflecting sheet and the connecting sheet of a preferred embodiment of the creation; as shown in the figure, this creation further reveals the reflecting plate 10 and the diffusion plate The connection of 3 0 is transmitted through a connection plate 40 ′. In order to increase the upward reflection light 14 to increase its brightness, this creation further reveals that the connection plate 40 connects the reflection plate 10 and the diffusion plate 30. A slope. At this time, the slope 0 3 is an obtuse angle, so as to increase the upward reflected light 1 4. 9 In summary, this creation is really a novel, progressive and industrial user. It should be in line with the patent application requirements of China's Patent Law. It must apply for a creation patent in accordance with the law. : Straightforward, I feel the prayer. /Searching

= The above is only one of the preferred embodiments of this creation. It is not intended to limit the scope of implementation of this creation. For example, if the shape, structure, characteristics, and spirit described in this creation are changed equally, the decoration = All should be included in the scope of patent application for this creation. The star festival

M266469 Brief description of the diagram [Simplified illustration of the diagram] The first diagram: a schematic diagram of the backlight module of the conventional technology; the second diagram: the schematic diagram of the backlight module of the conventional technology; Figure 2 · It is a schematic diagram of a flat plate-shaped reflecting plate of a conventional direct-type backlight module; Figure 4 · Figure is a schematic diagram of a saw-shaped structure of a reflecting plate of a conventional direct-type backlight module Figure 5 is a schematic diagram of the structure of a reflective sheet of a preferred embodiment of this creation; Figure /, Figure · It is a schematic diagram of the structure of a reflective sheet of another preferred embodiment of the creation; · It is a schematic diagram of a light path of a reflecting sheet of one preferred embodiment of this creation; Figure 8 · It is a schematic diagram of a light path of a reflecting sheet of another preferred embodiment of this creation; and Figure 9 · It is a schematic diagram of the structure of the reflective sheet and the connecting sheet of the preferred embodiment of the present invention. [Description of main component symbols] I ’backlight module outer layer II’ cymbal 12 ’diffuser

M266469 Brief description of the diagram 13 'Light guide plate 14' Light source 1 5 'Reflective line 1 6' Middle 15 'Reflective unit 152' Swash plate part 1 Backlight module 1 0 Reflective plate 12 Jagged surface 1 3 Emitted light 1 4 Reflected light 2 0 light source 2 2 middle 3 0 diffuser 40 connection piece 0 1 slope 0 2 slope 0 3 slope

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Claims (1)

M266469 ~~ ----_ ~~~~~-____-------——- V. Patent application scope1 · A type of reflection sheet structure for direct-type backlight module with uniform reflection, its main structure is The reflection sheet includes a plurality of light sources, the reflection sheet has a jagged surface, and the jagged angle of the jagged surface changes from large to small according to the distance from the light source. 2 · The structure described in item 1 of the scope of the patent application, wherein the jagged surface when the reflecting sheet is located directly below the light source is designed so that when an outgoing light source passes through the jagged surface, a reflective light source avoids The light source. 3. The structure according to item 2 of the scope of patent application, wherein the jagged surface directly below the light source may be a circular surface. 4. The structure according to item 2 of the scope of patent application, wherein the jagged surface directly below the light source may be an oval surface. 5. The structure according to item 2 of the scope of patent application, wherein the jagged surface directly below the light source may be an aspherical surface. 6. The structure according to item 2 of the scope of patent application, wherein the dentate surface directly below the light source may be a triangular surface. 7. The structure according to item 1 of the scope of the patent application, wherein both sides of the reflecting sheet and the light source include a connecting sheet, and the connecting sheet and the reflecting sheet have a reflection angle to change an edge light by using a slope Of reflection angle. Page 13