CN203223817U - Anti-scratch backlight module - Google Patents

Abstract

The utility model discloses a prevent scraping backlight unit, it includes a backplate, sets up a reflector Plate, a Light Guide Plate (LGP) of setting on the reflector Plate above the backplate, two at least gap component, and set up a Light source in Light Guide Plate one side. The gap element is arranged between the back plate and the reflecting sheet or between the reflecting sheet and the light guide plate, the outline of the reflecting sheet is rectangular, and a space is arranged between the reflecting sheet and the light guide plate so as to prevent foreign matters from scratching the bottom surface of the light guide plate.

Description

Anti-scratch backlight module

technical field

The utility model relates to a backlight module, in particular to an anti-scratch backlight module. the

Background technique

In the field of liquid crystal displays, since the liquid crystal panel cannot emit light by itself, in order to make the images generated by the liquid crystal panel visible to users, a backlight module needs to be installed on the back of the liquid crystal panel to provide the light source required by the liquid crystal panel. the

In order to greatly reduce the thickness of the backlight module, there is an edge-lit backlight module design. In an edge-lit backlight module, it mainly includes a backplane, a light source, and a light guide plate. It enters into the light guide plate from one side of the light guide plate, and after multiple reflections and mixed light, a uniform planar light source is formed and emitted from the top surface (light-emitting surface) of the light guide plate. the

Furthermore, in order to increase the utilization rate of the light source in the edge-lit backlight module, a reflective sheet is usually provided under the light guide plate to reflect the light emitted from the bottom surface of the light guide plate (the bottom surface of the light guide plate can also be called a reflective surface) back to the surface. in the light guide plate. However, when there are foreign objects between the light guide plate and the reflection sheet, it may also cause scratches on the bottom surface of the light guide plate during handling or transportation. What's more, if the reflective surface of the light guide plate is provided with dots for adjusting or controlling the light emitting characteristics of the light guide plate, these dots are also easily scratched during the above process, resulting in the failure of the entire light guide plate. the

Utility model content

In view of this, the present invention provides an anti-scratch backlight module, which is used to avoid the problem of scratches on the bottom surface of the light guide plate during handling or transportation as mentioned above, which further leads to the failure of the light guide plate. the

The main purpose of the present invention is to provide an anti-scratch backlight module, which can form a distance between the reflection sheet and the light guide plate by setting the gap element, so as to avoid scratching the light guide plate by foreign matter. the

In order to achieve the aforementioned purpose of the utility model, an embodiment of the utility model provides an anti-scratch backlight module, including a backplane, a reflector, a light guide plate, at least two gap elements and a light source, the reflector is set On the back plate, wherein the reflective sheet is a rectangle, the light guide plate is arranged on the reflective sheet, and there is a distance between the reflective sheet and the light guide plate, and the gap element It is arranged between the back plate and the reflection sheet, or between the reflection sheet and the light guide plate, and the light source is arranged on one side of the light guide plate. the

In an embodiment of the present invention, the anti-scratch backlight module includes four gap elements, and the gap elements respectively correspond to the four corners of the reflective sheet. the

In an embodiment of the present invention, the anti-scratch backlight module includes several additional gap elements, which are arranged between the back plate and the reflective sheet, or arranged between the reflective sheet and the light guide plate Between, the additional gap elements respectively correspond to the peripheral edge of the reflective sheet. the

In an embodiment of the present invention, each of the gap elements is a light-reflecting adhesive tape or a light-absorbing adhesive tape, and is disposed between the reflective sheet and the light guide plate. the

In an embodiment of the present invention, the anti-scratch backlight module includes four gap elements, the reflective sheet includes a main body, each of the gap elements is an extension, and each of the gap elements is respectively set at the four corners of the body. the

In an embodiment of the present invention, a folding line is formed between each extension portion and the main body, which is a bridging line. the

In an embodiment of the present invention, each of the extension parts is disposed on the top surface of the main body, and is disposed between the main body and the light guide plate. the

In an embodiment of the present invention, each of the gap elements is a protruding portion, and the protruding portion is disposed on the back plate and between the back plate and the reflection sheet. the

In an embodiment of the present invention, each of the protruding parts and the backboard is integrally formed. the

In an embodiment of the present invention, the light guide plate has a corresponding reflective surface and a light exit surface, the light exit surface has an effective light exit area, and the periphery of the effective light exit area is far from the periphery of the light exit surface A specific distance, wherein the effective light exit area has a distance between the vertical projection area of the reflective surface and the reflective sheet. the

As mentioned above, by arranging the gap element, a distance is formed between the reflective sheet and the light guide plate, so as to prevent foreign objects from scratching the light guide plate. the

Description of drawings

FIG. 1A is a schematic cross-sectional view of an anti-scratch backlight module according to an embodiment of the present invention. the

FIG. 1B is a schematic top view of the reflective sheet in FIG. 1A . the

FIG. 1C is a schematic top view of the light guide plate in FIG. 1A . the

FIG. 2A is a schematic top view of the reflective sheet of the anti-scratch backlight module according to an embodiment of the present invention. the

FIG. 2B is a schematic top view of the extended portion of the reflecting sheet shown in FIG. 2A . the

FIG. 2C is a schematic side view of the bending extension of the reflecting sheet in FIG. 2A . the

FIG. 2D is an enlarged schematic view of the structure between the main body and the extension portion of the reflective sheet in FIG. 2A . the

FIG. 3A is a schematic side view of an anti-scratch backlight module according to an embodiment of the present invention. the

FIG. 3B is a schematic top view of the backplane of FIG. 3A . the

Detailed ways

In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and understandable, the preferred embodiments of the present invention are specifically cited below, together with the accompanying drawings, for a detailed description as follows. Furthermore, the direction terms mentioned in the present utility model, such as up, down, top, bottom, front, back, left, right, inside, outside, side, surrounding, central, horizontal, transverse, vertical, longitudinal, axial , radial direction, the uppermost layer or the lowermost layer, etc., are only directions for referring to the attached drawings. Therefore, the used directional terms are used to illustrate and understand the present invention, but not to limit the present invention. the

Please refer to FIGS. 1A and 1B , which are respectively a schematic cross-sectional view of a scratch-resistant backlight module and a schematic top view of a reflector according to an embodiment of the present invention. The anti-scratch backlight module 100 includes a backplane 102 , a reflector 104 , a light guide plate 106 , four spacers 108 , and a light source 110 . The back plate 102 is used for setting the reflector 104, the light guide plate 106, the four-gap element 108, and the light source 110. In order to provide better protection for the above components, such as resisting the impact of foreign objects, the back plate The 102 can be made of a metal material such as aluminum alloy, and the high strength of the metal material can be used to provide better protection for other components. On the contrary, in order to reduce the overall weight of the anti-scratch backlight module 100 , the back plate 102 can be made of plastic materials. Furthermore, in a specific embodiment, in order to provide better protection for other components and reduce the overall weight of the scratch-resistant backlight module 100 , the back plate 102 can be made of plastic steel material. the

As shown in Figures 1A and 1B, the reflective sheet 104 is arranged on the back plate 102, wherein the reflective sheet 104 is rectangular, and the reflective sheet 104 can be in the shape of a sheet, film or plate, namely The thickness of the reflective sheet 104 is not limited. In this embodiment, no other components are arranged between the reflective sheet 104 and the backplane 102, therefore, the reflective sheet 104 can directly contact the backplane 102; however, in other embodiments, the reflective Other elements can be arranged between the sheet 104 and the backplane 102 according to other design requirements. the

In addition, in this embodiment, the light guide plate 106 is disposed on the reflective sheet 104, the gap element 108 is disposed between the reflective sheet 104 and the light guide plate 106, and the light source 110 is disposed on the reflective sheet 104. One side of the light guide plate 106 . With the gap element 108 provided, there is a distance between the reflective sheet 104 and the light guide plate 106 (see FIG. 1A ). the

More specifically, in order to have a better anti-scratch effect, the gap element 108 needs to have a space between the geometric center C of the reflective sheet 104 in FIG. 1A and the area adjacent to the geometric center C and the light guide plate 106 spacing. However, it can be understood that, in other embodiments, for example, when the area of the light guide plate 106 is large, the light guide plate 106 may sag under the influence of gravity, so that the geometric center C of the reflective sheet 104 and the The light guide plates 106 are in contact with each other without a distance, but there is still a distance between other parts of the reflective sheet 104 and the light guide plate 106 . the

In the preferred embodiment shown in FIGS. 1A and 1B , the number of the gap elements 108 is four. However, in other embodiments, the number of the gap elements 108 is at least two, so that there is a distance between the reflective sheet 104 and the light guide plate 106 as shown in FIG. 1A . the

By forming the distance between the reflective sheet 104 and the light guide plate 106, when foreign matter exists between the reflective sheet 104 and the light guide plate 106, and between the reflective sheet 104 and the light guide plate 106 When there is a corresponding translation between them, foreign matter can be prevented from scratching the bottom surface of the light guide plate 106 (reflective surface 106a). Furthermore, when the dots are provided on the bottom surface of the light guide plate 106 , it is possible to prevent the dots from being scratched by foreign matter, thereby avoiding the function failure of the entire light guide plate 106 . the

In this embodiment, the light source 110 is a light bar (Light Bar), including a printed circuit board (Printed Circuit Board; PCB) 110a and a plurality of light emitting diodes (Light Emitting Diode; LED) 110b, due to the viewing angle For the reason, only one LED 110b is shown in FIG. 1A , but the actual number of LEDs 110b can be adjusted according to optical performance requirements. In other embodiments, the light source 110 can also be replaced by a light bar such as a cold cathode fluorescent lamp (Cold Cathode Fluorescent Lamp; CCFL). the

In the embodiment shown in FIGS. 1A and 1B , in order to reduce the impact of the gap elements 108 on the optical performance of the scratch-resistant backlight module 100 , the four gap elements 108 correspond to the four corners of the reflective sheet 104 respectively. Corner, that is, the gap element 108 is arranged outside the visible area of the scratch-resistant backlight module 100 as much as possible. In addition, in this embodiment, each of the gap elements 108 is a light-reflecting adhesive tape, which is used to reflect light into the light guide plate 106 and stick the reflective sheet 104 on the light guide plate 106 . However, in a specific embodiment, each of the gap elements 108 can be a light-absorbing adhesive tape for absorbing part of the light, and each of the gap elements 108 is also arranged on the reflection sheet 104 and the light guide plate. Between 106. the

Please refer to FIGS. 1A , 1B and 1C together. FIG. 1C is a schematic top view of the light guide plate. The light guide plate 106 has a corresponding reflective surface 106a and a light-emitting surface 106b, and the light-emitting surface 106b has an effective light-emitting area 106c (see the range of the dotted line in Figure 1C), wherein the periphery of the effective light-emitting area 106c and the light-emitting surface 106b The perimeters of the cells are separated by a certain distance (see Figure 1C). The effective light emitting area 106c is a specific area in a general display panel for displaying information to a user. the

As shown in FIG. 1A , the effective light emitting area 106c has a distance between the vertical projection area 106d of the reflective surface 110a of the light guide plate 110 (the area between two dashed lines in FIG. 1A ) and the reflective sheet 104 . By setting the distance, it is possible to prevent foreign matter from scratching the reflective surface 106 a or dots of the light guide plate 106 , thereby avoiding the failure of the entire light guide plate 106 . the

Please refer to FIGS. 2A , 2B , and 2C , which are respectively a top view schematic diagram of a reflective sheet, a schematic top view schematic view of an extension part of the reflective sheet bent, and a schematic side view schematic view of an extended part of the reflective sheet bent according to an embodiment of the present invention. The connection relationship between the reflective sheet 204 and other components is similar to that between the reflective sheet 104 and other components, so it will not be repeated here, and only the differences between the reflective sheet 204 and the reflective sheet 104 will be described below. the

The reflective sheet 204 includes a main body 204 a and four extensions 208 disposed on four corners of the reflective sheet 204 , and the extensions 208 are spacers. When the extensions 208 are bent toward the top surface of the main body 204a of the reflection sheet 204, each of the extensions 208 is disposed behind the top surface of the main body 204a of the reflection sheet 204 (see FIG. 2C ), the extension The portion 208 is located at the four corners of the reflective sheet 204 as shown in FIG. 2B . the

The light guide plate is placed on the reflective sheet 204 shown in FIGS. 2A to 2C . With the structure shown in FIG. 2C , the extension 208 is disposed between the main body 204a of the reflective sheet 204 and the light guide plate. space, so that there is a distance between the reflective sheet 204 and the light guide plate, which can achieve the embodiment shown in FIGS. Efficacy of function failure. the

Please refer to FIG. 2D , which is an enlarged schematic diagram of the structure between the main body and the extension part of the reflection sheet. A folding line 212 is formed between each of the extensions 208 and the main body 204a of the reflection sheet 204, also known as a bridging line, to make the extensions 208 easier to bend toward the main body 204a of the reflection sheet 204. . the

In addition, in other embodiments, the extension part 208 can be bent toward the bottom surface of the main body 204a of the reflection sheet 204 (not shown), so that the extension part 208 is disposed on the back plate (not shown) and the Between the reflective sheets 207, due to the difference in rigidity between the reflective sheet 204 and the light guide plate, at the geometric center (not shown) of the reflective sheet 204 and the vicinity of the geometric center, the reflective sheet 204 is different from the degree of curvature caused by the influence of gravity on the light guide plate, so that there is a distance between the geometric center of the reflective sheet 204 and the area adjacent to the geometric center and the light guide plate, which can also achieve the same effect as shown in Fig. Embodiments 1A to 1C prevent foreign matter from scratching the reflective surface 106a or dots of the light guide plate 106 , thereby avoiding the function failure of the entire light guide plate 106 . the

Please refer to FIGS. 3A and 3B , which are a schematic side view of a scratch-resistant backlight module and a schematic top view of a backplane, respectively, according to an embodiment of the present invention. The component structure of this embodiment is similar to the embodiment shown in Figures 1A to 1C, so the same components as in the previous embodiment are marked with the same symbols, and the same components or the relationship between the components will not be repeated, the following only Describe the differences. the

In the anti-scratch backlight module 300, four gap elements 308 are included, each of the gap elements 308 is a protruding part, and the protruding part is arranged on the back plate 302, and is arranged on the Between the back plate 302 and the reflection sheet 104 . During the assembly process of the anti-scratch backlight module 300, when the reflective sheet 104 and the light guide plate 106 are placed on the backplane 302, the four gap elements 308 are respectively connected to the reflective sheet 104 corresponding to the four corners. Due to the difference in rigidity between the reflective sheet 104 and the light guide plate 106, the reflective sheet 104 and the light guide plate 106 are affected by gravity at the geometric center C of the reflective sheet 104 and the vicinity of the geometric center C. The degree of curvature is different, so that there is a distance between the geometric center C of the reflective sheet 104 and the area adjacent to the geometric center C and the light guide plate 106, which can also achieve the embodiment of FIGS. 1A to 1C and avoid scratches by foreign objects. The reflective surface 106a or dots of the light guide plate 106 can avoid the failure of the entire light guide plate 106 . the

In addition, in this embodiment, each of the protrusions (gap elements 308) is formed on the back plate 302 by stamping, and its shape is not limited to the shape shown in FIG. 3A . The protrusions may be of any shape that the stamping process is capable of forming. In other specific embodiments, each of the protruding portions (interval elements 308 ) can be integrally formed on the back plate 302 such as by injection molding. the

Please refer to FIG. 3B again, the anti-scratch backlight module 300 further includes a plurality of additional gap elements 310 disposed between the back plate 302 and the reflective sheet 104, wherein the additional gap elements 310 respectively correspond to the The periphery of the reflective sheet 104. In this one embodiment, the additional gap element 310 is similar to the gap element 308, while in other embodiments, the additional gap element 310 is different from the gap element 308. In addition, there are four additional gap elements 310, which are arranged on the left and right sides of FIG. 3B. However, the number and location of the additional gap elements 310 are not limited to this embodiment. be adjusted. the

Moreover, the additional gap element 310 can be arranged between the back plate 302 and the reflective sheet 104, or between the reflective sheet and the light guide plate, and its location is not shown in the figure. 3A, 3B shown in the embodiment is limited. the

It should be emphasized here that the various changes of the above-mentioned various embodiments do not need to be implemented at the same time to exert their functions. After referring to the contents of this specification, those skilled in the art can conditions to be selectively used to achieve its desired effect. the

In addition, the various anti-scratch backlight modules of the above-mentioned various embodiments can be applied to the display field. In addition to the various anti-scratch backlight modules of the above-mentioned various embodiments, the above-mentioned display further includes a display panel (not shown), which is arranged on the anti-scratch backlight module for Receive the incident light from the anti-scratch backlight module. the

The utility model has been described by the above-mentioned relevant embodiments, but the above-mentioned embodiments are only examples for implementing the utility model. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, modifications and equivalent arrangements included in the spirit and scope of the claims are included in the scope of the present invention. the

Claims (10)

1. An anti-scratch backlight module, characterized in that: the anti-scratch backlight module comprises: a backplane; a reflective sheet arranged on the back plate, wherein the reflective sheet is a rectangle; A light guide plate is arranged on the reflective sheet, and there is a distance between the reflective sheet and the light guide plate; At least two gap elements are arranged between the back plate and the reflective sheet, or between the reflective sheet and the light guide plate; and A light source is arranged on one side of the light guide plate. 2 . The anti-scratch backlight module according to claim 1 , wherein the anti-scratch backlight module comprises four gap elements, and the gap elements respectively correspond to the four corners of the reflection sheet. 3. The anti-scratch backlight module according to claim 1, characterized in that: the anti-scratch backlight module comprises several additional spacers arranged between the back plate and the reflector, or arranged between Between the reflective sheet and the light guide plate, the additional gap elements respectively correspond to the periphery of the reflective sheet. 4. The anti-scratch backlight module according to claim 1, wherein each of the gap elements is a light-reflecting tape or a light-absorbing tape, and is arranged between the reflective sheet and the light guide plate between. 5. The anti-scratch backlight module according to claim 1, wherein the anti-scratch backlight module comprises four spacers, the reflector comprises a main body, and each spacer is an extension , each of the gap elements is respectively arranged at four corners of the main body. 6. The anti-scratch backlight module as claimed in claim 5, wherein a folding line is formed between each of the extension parts and the main body. 7 . The anti-scratch backlight module as claimed in claim 5 , wherein each of the extension parts is disposed on the top surface of the main body, and is disposed between the main body and the light guide plate. 8. The anti-scratch backlight module according to claim 1, characterized in that: each of the gap elements is a protrusion, and the protrusion is disposed on the back plate, and is disposed on the back between the plate and the reflector. 9 . The anti-scratch backlight module according to claim 8 , wherein each of the protrusions is integrally formed with the back plate. 10 . 10. The anti-scratch backlight module according to claim 1, wherein the light guide plate has a corresponding reflecting surface and a light emitting surface, the light emitting surface has an effective light emitting area, and the effective light emitting area There is a certain distance between the peripheral edge and the peripheral edge of the light emitting surface, wherein the effective light emitting area has a distance between the vertical projection area of the reflecting surface and the reflecting sheet.

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