TWM472208U - Display and anti-scratch backlight module thereof - Google Patents

Abstract

An anti-scratch backlight module includes a rear plate, a reflector disposed onto the rear plate, a light guide plate(LGP) disposed onto the reflector, at least two spacing devices, and a light source disposed near one side of the LGP. The spacing devices are disposed between the rear plate and the reflector, or disposed between the reflector and the LGP. The outline of the reflector is substantially a rectangle. There is a gap between the substantial geometric center of the reflector and the LGP to prevent from that some substances scratch the bottom surface of the LGP. Besides, the anti-scratch backlight module can be applied in a display.

Description

Display and its anti-scratch backlight module

The present invention relates to a backlight module and a display; in particular, to a backlight module capable of preventing foreign matter from scratching the reflective surface of the light guide plate, and a display including the backlight module.

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

In order to greatly reduce the thickness of the backlight module, there is a design of the edge-lit backlight module. In the edge-lit backlight module, the backplane, the light source, and the light guide plate are mainly included, wherein the back plate is used to accommodate the light source and the light guide plate, and the light source is disposed adjacent to one side of the light guide plate, so that the light source is generated. The light enters the light guide plate from one side of the light guide plate, and after multiple reflections and light mixing, a uniform planar light source is formed to be emitted from the top surface (light exit surface) of the light guide plate.

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

Therefore, it is necessary to provide a new type of anti-scratch backlight module structure to avoid the problem of scratching the bottom surface of the light guide plate during transportation or transportation, thereby causing the light guide plate to fail.

The present invention provides an anti-scratch backlight module, comprising a back plate, a reflective sheet disposed on the back plate, a light guide plate disposed on the reflective sheet, at least two gap elements, and adjacent one side of the light guide plate. light source. The gap element is disposed between the back plate and the reflective sheet, or disposed between the reflective sheet and the light guide plate, and the reflective sheet has a substantially rectangular outline, and the reflective sheet has a spacing between the reflective sheet and the light guide plate.

In the anti-scratch backlight module described above, at least two gap elements are four gap elements, and respectively correspond to the four corners of the rectangle of the reflection sheet. In addition, the anti-scratch backlight module further includes a plurality of other gap elements disposed between the back plate and the reflective sheet, or disposed between the reflective sheet and the light guide plate, wherein the other gap elements respectively correspond to the reflective sheet The perimeter of the rectangle.

In the above-mentioned anti-scratch backlight module, at least two gap elements are four gap elements, and the reflection sheet comprises a main body and four extension portions disposed at four corners of the reflection sheet, and the extension portions are the gap elements described above. . In addition, a fold line is arranged between each extension and the main body, which is commonly known as a riding line. Furthermore, each of the extending portions is disposed on a top surface of the main body of the reflective sheet, and is disposed between the main body and the light guide plate.

In the anti-scratch backlight module described above, each of the gap elements is a protrusion, and the protrusions are disposed on the back plate and disposed between the back plate and the reflective sheet.

In the anti-scratch backlight module described above, wherein the light guide plate has a relative reflection The surface and the light-emitting surface have an effective light-emitting area, and the periphery of the effective light-emitting area is separated from the periphery of the light-emitting surface by a certain distance. In addition, the effective light-emitting region has a spacing between the vertical projection area of the reflective surface and the reflective sheet.

The present invention provides a display comprising the anti-scratch backlight module as described above, and a display panel, wherein the display panel is disposed on the anti-scratch backlight module for receiving incident from the anti-scratch backlight module Light.

100‧‧‧Scratch resistant backlight module

102‧‧‧ Backplane

104‧‧‧reflector

106‧‧‧Light guide plate

106a‧‧‧reflecting surface

106b‧‧‧Glossy

106c‧‧‧effective light-emitting area

106d‧‧‧Vertical projection area

108‧‧‧ clearance components

110‧‧‧Light source

110a‧‧‧Printed circuit board

110b‧‧‧Lighting diode

204‧‧‧reflector

204a‧‧‧reflector

208‧‧‧Extension

212‧‧‧ fold line

300‧‧‧Scratch resistant backlight module

302‧‧‧ Backplane

308‧‧‧ clearance components

310‧‧‧Other gap components

C‧‧‧Substantial Geometry Center

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

Fig. 1B is a schematic plan view showing the reflection sheet shown in Fig. 1A.

FIG. 1C is a schematic plan view showing the light guide plate in FIG. 1A.

2A is a schematic plan view showing the development of a reflection sheet according to an embodiment of the present invention.

FIG. 2B is a schematic plan view showing the bent portion of the reflection sheet in FIG. 2A.

2C is a side view showing the flexure of the extension of the reflection sheet in FIG. 2A.

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

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

FIG. 3B is a schematic plan view showing the back plate in FIG. 3A.

Please refer to FIGS. 1A and 1B , which are respectively a schematic cross-sectional view of a scratch-resistant backlight module according to an embodiment of the present invention, and a top view of the reflective sheet shown in FIG. 1A . The scratch-resistant backlight module 100 includes a back plate 102, a reflective sheet 104, a light guide plate 106, four gap elements 108, and a light source 110. The back plate 102 is used to set the reflection sheet 104, the light guide plate 106, and the fourth The gap element 108 and the light source 110, and in order to provide better protection of the above components, for example, against the impact of the foreign object, the back plate 102 can be made of a metal material such as an aluminum alloy, and the high strength characteristics of the metal material are used to provide other components. Better protection. On the contrary, if the weight of the scratch-resistant backlight module 100 as a whole is reduced, the back plate 102 can be manufactured by using a material such as plastic. Moreover, in a specific embodiment, in order to balance the two aspects of providing better protection of other components and reducing the overall weight of the scratch-resistant backlight module 100, the backing plate 102 may be fabricated from a material such as plastic steel.

As shown in FIGS. 1A and 1B, the reflection sheet 104 is disposed on the back plate 102, wherein the outline of the reflection sheet 104 is substantially rectangular, and the reflection sheet 104 may be in the form of a sheet, a film or a plate, that is, a reflection. The thickness of the sheet 104 is not limited. In this embodiment, no other components are disposed between the reflective sheet 104 and the backing plate 102, so the reflective sheet 104 is in direct contact with the backing plate 102; however, in other embodiments, between the reflective sheet 104 and the backing plate 102 Other components can be set up according to other design requirements.

In addition, in the embodiment, the light guide plate 106 is disposed on the reflective sheet 104, the four gap elements 108 are disposed between the reflective sheet 104 and the light guide plate 106, and the light source 110 is disposed adjacent to one side of the light guide plate 106. By the action of the above four gap elements 108, the reflection sheet 104 and the light guide plate 106 have a spacing (as shown in FIG. 1A).

More specifically, in order to have a better anti-scratch effect, the gap member 108 needs to have a substantial geometric center C of the reflective sheet 104 shown in FIG. 1A and a region between the adjacent 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 be drooped by gravity, so that the substantially geometric center C of the reflective sheet 104 and the light guide plate 106 are in contact with each other. Does not have a spacing, but There is still a gap between the other portions of the reflective sheet 104 and the light guide plate 106.

In the preferred embodiment illustrated in Figures 1A and 1B, the number of gap elements 108 is four. However, in other embodiments, the number of the gap elements 108 is at least two, thereby providing a spacing between the reflective sheet 104 and the light guide plate 106 as shown in FIG. 1A.

Between the reflective sheet 104 and the light guide plate 106, a space is provided between the reflective sheet 104 and the light guide plate 106, and a relative between the reflective sheet 104 and the light guide plate 106 is generated. When the image is translated, the foreign matter can be prevented from scratching the bottom surface (reflecting surface 106a) of the light guide plate 106. Moreover, when the bottom surface of the light guide plate 106 is provided with a dot, it is possible to prevent the foreign matter from scratching the dot, thereby avoiding the failure of the function of the entire light guide plate 106.

In this embodiment, the light source 110 is a light bar, which includes a printed circuit board (PCB) 110a and a plurality of light emitting diodes (LEDs) 110b. For this reason, only one LED 110b is shown in FIG. 1A, however the actual number of LEDs 110b can be adjusted according to optical performance requirements. In other embodiments, the light source 110 can also replace the above-mentioned light bar with a lamp such as a Cold Cathode Fluorescent Lamp (CCFL).

In the embodiment shown in FIGS. 1A and 1B, in order to reduce the influence of the gap element 108 on the optical performance of the scratch-resistant backlight module 100, the four gap elements 108 respectively correspond to the rectangular corners of the reflective sheet 104, That is, the gap element 108 is disposed outside the visible area of the scratch-resistant backlight module 100 as much as possible. Moreover, in this embodiment, each of the gap elements 108 is a light reflective tape for reflecting light into the light guide plate 106 and adhering the reflective sheet 104 to the light guide plate 106. However, in a particular embodiment, each of the gap elements 108 can be a light absorbing tape for absorbing a portion of the light, and each gap element 108 is also disposed between the reflective sheet and the light guide.

Please refer to FIG. 1A to FIG. 1C together, wherein FIG. 1C is a schematic plan view of the light guide plate in FIG. 1A. The light guide plate 106 has a reflective surface 106a and a light exit surface 106b. The light exit surface 106b has an effective light exiting region 106c (as indicated by a broken line in FIG. 1C), wherein the periphery of the effective light exiting region 106c and the light exiting surface 106b The perimeter is a certain distance apart (as shown in Figure 1C). The effective light-emitting area 106c refers to a specific area corresponding to an area in the display panel where information is displayed to the user.

As shown in FIG. 1A, the effective light-emitting region 106c has a pitch between the vertical projection region 106d (the region between the two broken lines in FIG. 1A) of the reflective surface 110a of the light guide plate 110 and the reflection sheet 104. By the arrangement of the spacing, foreign matter can be prevented from scratching the reflective surface 106a or the dot of the light guide plate 106, thereby avoiding the failure of the function of the entire light guide plate 106.

Please refer to FIG. 2A to FIG. 2C, which are respectively a schematic plan view showing the reflection sheet according to an embodiment of the present invention, a perspective view of the reflection sheet extension portion in FIG. 2A, and a reflection sheet extension portion in FIG. 2A. Flexed side view. The relationship between the reflection sheet 204 and other elements is similar to the relationship between the reflection sheet 104 and other elements, and therefore will not be described herein. Hereinafter, only the difference between the reflection sheet 204 and the reflection sheet 104 will be described.

The reflection sheet 204 includes a main body 204a and four extending portions 208 disposed at four corners of the reflection sheet 204, and the extension portions 208 are like the gap members shown in FIGS. 1A and 1B. When the extension portion 208 is bent toward the top surface of the main body 204a of the reflection sheet 204 such that each extension portion 208 is disposed behind the top surface of the main body 204a of the reflection sheet 204 (as shown in FIG. 2C), the extension portion 208 is as the second portion BB. As shown in the figure, they are located at the four corners of the reflection sheet 204.

After the light guide plate is placed on the reflection sheet 204 shown in FIGS. 2A to 2C, the extension portion 208 is disposed on the main body 204a of the reflection sheet 204 and the light guide by the structure as shown in FIG. 2C. Between the plates, there is a gap between the reflective sheet 204 and the light guide plate, which can achieve the effects of the embodiments corresponding to the above 1A to 1C drawings.

Please refer to FIG. 2D, which is an enlarged schematic view showing the structure between the main body and the extending portion of the reflecting sheet in FIG. 2A. As shown in FIG. 2D, each of the extending portions 208 and the main body 204a of the reflecting sheet 204 is provided with a fold line 212, which is generally called a riding stitch, which mainly makes the extending portion 208 more easily toward the main body 204a of the reflecting sheet 204. Flexed.

In addition, in other embodiments, the extending portion 208 can be bent toward the bottom surface of the main body 204a of the reflective sheet 204 (not shown), so that the extending portion 208 is disposed between the back plate (not shown) and the reflective sheet 207. The difference in rigidity between the reflective sheet 204 and the light guide plate causes a difference in the degree of bending caused by the influence of gravity on the reflective sheet 204 and the light guide plate at a substantial geometric center (not shown) of the reflective sheet 204 and the vicinity of the substantial geometric center. Further, the substantial geometric center of the reflective sheet 204 and the substantially geometric center adjacent region and the light guide plate have a spacing therebetween, which can also achieve the effects of the embodiments corresponding to the first FIGS. 1A to 1C.

Please refer to FIGS. 3A and 3B , which are respectively side views of the anti-scratch backlight module according to an embodiment of the present invention, and a top view of the back plate in FIG. 3A . This embodiment is similar to the embodiment shown in FIGS. 1A to 1C, and the same components as those in the previous embodiment are denoted by the same reference numerals, and the relationship between the same components or components will not be described again. The difference part.

In the anti-scratch backlight module 300, there are four gap elements 308, each of the gap elements 308 is a protrusion, and the protrusions are disposed on the back plate 302 and disposed on the back plate 302 and Between the reflective sheets 104. During the assembly process of the scratch-resistant backlight module 300, when the reflective sheet 104 and the light guide plate 106 are placed on the back plate 302, the four gap elements 308 and the reflective sheet 104 are respectively The four corners of the rectangle correspond. The difference in rigidity between the reflective sheet 104 and the light guide plate 106 causes the degree of bending of the reflective sheet 104 and the light guide plate 106 to be affected by gravity at the substantial geometric center C of the reflective sheet 104 and the vicinity of the substantial geometric center C. In addition, a substantial geometric center C of the reflective sheet 104 and a region between the adjacent geometric center C and the light guide plate 106 have a spacing, which can also achieve the effects of the embodiments corresponding to the first FIGS. 1A to 1C.

Further, in the present embodiment, each of the projections (gap members 308) is formed on the backing plate 302 in a stamping manner, and the shape thereof is not limited to the shape as shown in FIG. 3A, and each of the projections It can be any shape that can be formed by the stamping process. In other specific embodiments, each of the projections (gap members 308) may be formed on the backing plate 302 as an injection molding.

Referring to FIG. 3B again, the anti-scratch backlight module 300 further includes a plurality of other gap elements 310 disposed between the back plate 302 and the reflective sheet 104, wherein the other gap elements 310 respectively correspond to the rectangular shape of the reflective sheet 104. Surroundings. In this embodiment, the other gap elements 310 are substantially identical to the gap elements 308, while in other embodiments, the other gap elements 310 are different than the gap elements 308. In addition, the number of the other gap elements 310 is four, and the installation position is on the left and right sides of the third FIG. 3B. However, the number and arrangement positions of the other gap elements 310 are not limited to the embodiment, and may be determined according to different design requirements. Adjustment.

Furthermore, the other gap elements 310 may be disposed between the reflective sheet and the light guide plate, and may be disposed between the reflective sheet and the light guide plate, and are not disposed in the embodiment shown in FIGS. 3A and 3B. Limited.

It should be emphasized that various changes of the various embodiments described above are not required to be implemented at the same time, and those skilled in the art can refer to the contents of the present specification as The situation is selectively adopted to achieve what it wants The effect.

In addition, various anti-scratch backlight modules of the various embodiments described above can be applied to the field of displays. In addition to the various anti-scratch backlight modules of the various embodiments as described above, the display further includes a display panel (not shown) disposed on the anti-scratch backlight module. For receiving incident light from the scratch-resistant backlight module.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any person skilled in the art can make various changes and refinements without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached.

100‧‧‧Scratch resistant backlight module

102‧‧‧ Backplane

104‧‧‧reflector

106‧‧‧Light guide plate

106a‧‧‧reflecting surface

106b‧‧‧Glossy

106c‧‧‧effective light-emitting area

106d‧‧‧Vertical projection area

108‧‧‧ clearance components

110‧‧‧Light source

110a‧‧‧Printed circuit board

110b‧‧‧Lighting diode

C‧‧‧Substantial Geometry Center

Claims (12)

An anti-scratch backlight module includes: a back plate; a reflective sheet disposed on the back plate, wherein the reflective sheet has a substantially rectangular shape; a light guide plate is disposed on the reflective sheet; At least two gap elements disposed between the back plate and the reflective sheet, or disposed between the reflective sheet and the light guide plate; and a light source disposed adjacent to one side of the light guide plate; wherein the reflective sheet and the reflective sheet There is a spacing between the light guide plates. The anti-scratch backlight module of claim 1, wherein the at least two gap elements are four gap elements, and the gap elements respectively correspond to the four corners of the rectangle of the reflection sheet. The anti-scratch backlight module of claim 1, further comprising a plurality of other gap elements disposed between the back plate and the reflective sheet or between the reflective sheet and the light guide plate, wherein the The other gap elements respectively correspond to the periphery of the rectangle of the reflection sheet. The anti-scratch backlight module of claim 1, wherein each of the gap elements is a light reflective tape or a light absorbing tape, and is disposed between the reflective sheet and the light guide plate. The anti-scratch backlight module of claim 1, wherein the at least two gap elements are four gap elements, the reflection sheet comprises a body and four extensions disposed at four corners of the reflection sheet, the extension portions are The gap elements. The anti-scratch backlight module of claim 5, wherein each of the extensions and the main body is provided with a fold line. The anti-scratch backlight module of claim 5, wherein each of the extension portions is disposed on a top surface of the main body of the reflective sheet and disposed between the main body and the light guide plate. The anti-scratch backlight module of claim 1, wherein each of the gap elements is a protrusion, the protrusions are disposed on the back plate, and are disposed on the back plate and the reflection sheet between. The anti-scratch backlight module of claim 8, wherein each of the protrusions is integrally formed on the backboard. The anti-scratch backlight module of claim 9, wherein each of the protrusions is formed on the back plate by stamping or injection molding. The anti-scratch backlight module of claim 1, wherein the light guide plate has a reflective surface and a light exiting surface, and the light emitting surface has an effective light exiting area, and the periphery of the effective light emitting area and the light emitting surface The periphery is spaced apart by a specific distance; wherein the effective light exiting region has a spacing between the vertical projection area of the reflective surface and the reflective sheet. A display comprising: the scratch-resistant backlight module of any one of claims 1 to 10; A display panel is disposed on the anti-scratch backlight module for receiving incident light from the anti-scratch backlight module.