TWI459091B - Backlight module and display device using the same - Google Patents

Description

Backlight module and display device using same

The present invention relates to a surface light source, and more particularly to a backlight module and a display device using the same.

1 is a perspective exploded view of a conventional liquid crystal display device, and FIG. 2 is a partial cross-sectional view of the liquid crystal display device of FIG. 1. Referring to FIG. 1 and FIG. 2 , the conventional liquid crystal display device 100 includes a backlight module 110 , a liquid crystal display panel 120 , and a front frame 130 . The backlight module 110 includes a back plate 111, a light guide plate 112, a plastic frame 113, and a plurality of optical films 117. The light guide plate 112 is disposed on the back plate 111, and the optical film 117 is disposed on the light guide plate 112. The plastic frame 113 has a groove 114 and a bearing portion 115. The sidewall 116 of the back plate 111 extends into the trench 114, and the liquid crystal display panel 120 is disposed on the carrier portion 115. The front frame 130 is combined with the back plate 111 to cover the light guide plate 112, the plastic frame 113, the optical film 117, and the liquid crystal display panel 120.

In the conventional liquid crystal display device 100, the plastic frame 113 extends from the inner side of the back plate 111 to the outer side of the back plate 111, and the width D1 of the lid portion 131 of the front frame 130 of the liquid crystal display device 100 is wide. However, today's display devices are all pursuing a narrow bezel (i.e., the width D1 needs to be reduced as much as possible), so that the conventional liquid crystal display device 100 cannot meet this requirement. In addition, the plastic frame 113 has more materials, higher material cost, and increases the weight of the entire liquid crystal display device 100. Therefore, the structure of the conventional liquid crystal display device 100 is disadvantageous for achieving a narrow bezel and a lightweight design requirement.

The invention provides a backlight module which has the advantages of light weight.

The present invention further provides a display device having the advantages of a light weight and a narrow bezel.

In order to achieve the above advantages, the present invention provides a backlight module. The backlight module includes an optical component and a plurality of supports. These supports are disposed at the edges of the optical member. Each support member has a side wall and a support portion, the side wall being located beside the edge of the optical member, and the support portion extending from the side wall to above the optical member. The side wall has a first portion below the support and a second portion above the support.

In an embodiment of the invention, the wall thickness of the first portion is greater than the wall thickness of the second portion.

In an embodiment of the invention, each of the support members is disposed at a corner of the optical member, and each support member has a turning portion such that the first portion is located adjacent to adjacent sides of the optical member.

In an embodiment of the invention, the support member is made of an elastic material.

In an embodiment of the invention, the backlight module further includes a back plate, and the optical components and the support members are disposed on the back plate. The backboard has connected bottoms and side walls, and the side walls of each support member bear against the bottom and side walls of the backboard.

In an embodiment of the invention, the side wall of each of the support members is adhered to the bottom and the side wall of the backboard through the colloid.

The invention also provides a display device, which comprises a backlight module and a display panel. The backlight module includes an optical component and a plurality of supports. These supports are disposed at the edges of the optical member. Each support member has a side wall and a support portion, the side wall being located at an edge of the optical member, and the support portion extending from the side wall to above the optical member. The side wall has a first portion below the support portion and a second portion above the support portion, and the first portion and the support portion bear against the optical member. The display panel is disposed on the support portions.

In an embodiment of the invention, the display device further includes a front frame coupled to the back panel to cover the backlight module and the display panel.

In an embodiment of the invention, the display device further includes a casing, and the casing includes a first casing and a second casing. The first housing has a bearing surface, and the backlight module is disposed on the bearing surface. A positioning structure is provided on the bearing surface to fix the support portions of the backlight module. There is a gap between the positioning structure and the edge of the bearing surface. The second housing is combined with the first housing to cover the backlight module and the display panel.

In an embodiment of the invention, the side wall of each support member has a bottom surface facing the bearing surface, and the bottom surface is provided with at least one positioning hole, and the positioning structure comprises a plurality of positioning posts respectively inserted into the positioning holes.

In the backlight module and the display device of the present invention, the plastic frame is replaced by a plurality of support members, because the material of the support member is less, the material cost can be reduced, and the weight of the backlight module and the display device can be reduced. In addition, since the support member is located only on the inner side of the back plate and does not extend to the outer side of the back plate, the display device can be made to meet the requirements of a narrow bezel.

The above and other objects, features and advantages of the present invention will become more <RTIgt;

3 is a perspective exploded view of a display device according to an embodiment of the invention. 4 is a partial, perspective, cross-sectional view of the display device of FIG. 3. FIG. 5 is a perspective view of the support member of the display device shown in FIG. 3. FIG. Referring to FIG. 3 to FIG. 5 , the display device 200 of the embodiment includes a backlight module 210 and a display panel 220 . The backlight module 210 includes an optical member 212 and a plurality of supports 213. These support members 213 are disposed at the edges of the optical member 212. Each support member 213 has a side wall 214 and a support portion 215, the side wall 214 being located beside the edge of the optical member 212, and the support portion 215 extending from the side wall 214 above the optical member 212. The side wall 214 has a first portion 214a below the support portion 215 and a second portion 214b above the support portion 215, while the first portion 214a and the support portion 215 can bear against the optical member 212. The display panel 220 is disposed on the support portions 215.

In detail, the optical member 212 is, for example, a light guide plate. A reflective sheet 217 may be disposed under the optical member 212, and a plurality of optical films 218 (such as a ruthenium sheet, a diffusion film, etc.) may be disposed above the optical member 212. The backlight module 210 further includes, for example, a light source (not shown) disposed beside the optical member 212. In addition, the backlight module 210 may further include a back plate 216 , and the optical components 212 and the support members 213 are disposed on the back plate 216 . The backing plate 216 has an associated bottom portion 216a and side walls 216b, and the side walls 214 of each of the support members 213 bear against, for example, the bottom portion 216a and the side walls 216b of the backing plate 216. In an embodiment, the sidewall 214 of each support member 213 is further adhered to the bottom portion 216a and the sidewall 216b of the backing plate 216 through a colloid.

In the present example, the wall thickness T1 of the first portion 214a of the side wall 214 is greater than the wall thickness T2 of the second portion 214b to increase the maximum supporting force of the support portion 215. In addition, the number of the support members 213 of the embodiment is, for example, four, but the invention is not limited thereto. Each support member 213 is disposed, for example, at a corner of the optical member 212. Specifically, each support member 213 has, for example, a turning portion 213a such that the first portion 214a of the side wall 214 is located adjacent to adjacent sides of the optical member 212, wherein the first portion 214a can bear adjacent to the optical member 212 On both sides. However, the present invention does not limit the support member 213 to be disposed at a corner of the optical member 212. In another embodiment shown in Fig. 6, the support member 213' may have no turning point, and the support member 213' may be disposed at any suitable position beside the side of the optical member 212. In still another embodiment, the backlight module can have both the support member 213 and the support member 213' described above.

The display panel 220 described above is, for example, a liquid crystal display panel or other non-self-luminous display panel. Further, the display device 200 may further include a front frame 230. The front frame 230 has an associated cover portion 231 and side walls 232. The front frame 230 is combined with the back plate 216 to cover the backlight module 210 and the display panel 220. In this embodiment, the side wall 232 of the front frame 230 can be connected to the side wall 216b of the back plate 216 by snapping, but the present invention does not limit the manner in which the front frame 230 and the back plate 216 are combined.

In this embodiment, a plurality of supporting members 213 are used to replace the plastic frame 113 of the conventional display device 100 (as shown in FIG. 1). Compared with the plastic frame 113 of the prior art, the supporting member 213 used in the embodiment is used. The material of the support member 213 can be greatly reduced, so that the weight and cost of the backlight module 210 and the display device 200 can be reduced. In addition, since the support member 213 does not extend to the outer side of the back plate 216, the width D2 of the cover portion 231 of the front frame 230 can be reduced, thereby making the display device 200 conform to the requirements of the narrow frame. In addition, the material of the support member 213 may be an elastic material such as rubber or plastic. As such, when the display device 200 is shaken, the support member 213 can provide a buffering function to prevent the display panel 220 from being damaged.

The display device 200 described above can be applied to an electronic product such as a television, a computer screen, or a portable electronic product having a display function (such as a mobile phone, a satellite navigation machine, a notebook computer, or a tablet computer). In general, the display device 200 is covered by the casing of the electronic product. However, in the present invention, the support member may also be directly disposed in the casing. Hereinafter, an embodiment in which the support member is disposed in the casing will be described in detail with reference to the drawings.

FIG. 7 is a partial cross-sectional view showing a display device according to another embodiment of the present invention. Referring to FIG. 7 , the display device 300 of the present embodiment is similar to the display device 200 described above, except that the display device 300 does not have the back plate 216 and the front frame 230 of FIG. 4 . In addition, the display device 300 further includes a casing 330 that encloses the backlight module 310 and the display panel 320. When the display device 300 is applied to an electronic product, the casing 330 can directly serve as a casing of the electronic product.

The casing 330 includes a first casing 332 and a second casing 333. The first housing 332 has a bearing surface 334a. Specifically, the first housing 332 has, for example, a connected bottom portion 334 and a side wall 335, and the bottom portion 334 has the above-described bearing surface 334a. The backlight module 310 is disposed on the bearing surface 334a. The bearing surface 334a is provided with a positioning structure 334b for fixing the supporting members 313 of the backlight module 310. There is a certain gap 334c between the positioning structure 334b and the edge of the bearing surface 334a (i.e., between the positioning structure 334b and the side wall 335). This gap 334c can be used to accommodate related parts or wires of an electronic product.

In this embodiment, each support member 313 is similar to the support member 213 described above, except that the side wall 314 of the support member 313 has a bottom surface 314a facing the bearing surface 334a, and the bottom surface 314a is provided with at least one positioning hole 314b (FIG. 7). Take one as an example). The positioning structure 334b includes, for example, a plurality of positioning posts that are respectively inserted into the positioning holes 314b of the support members 313 to fix the support members 313.

The second housing 333 has, for example, a connecting cover portion 336 and a side wall 337. The second housing 333 is combined with the first housing 332 to cover the backlight module 310 and the display panel 320. The side wall 337 of the second housing 333 can be coupled to the side wall 335 of the first housing 332 by a snap fit, but the present invention does not limit the manner in which the second housing 333 is coupled to the first housing 332.

Since the display device 300 of the present embodiment does not have a backboard and a front frame, when applied to an electronic product, the cost of the backboard and the front frame can be saved, and the overall weight can be reduced. It should be noted that the above-mentioned positioning structure 334b is for example only, and the present invention does not limit the specific structure of the positioning structure. Moreover, the positioning hole 314b of the support member 313 is also unnecessary. For example, please refer to FIG. 8 , which is a schematic top view of a display device according to another embodiment of the present invention, but FIG. 8 omits the second housing. In FIG. 8, the positioning structure 334b' is, for example, a frame on the bearing surface 334a. The side wall 314' of the support member 313' can be fixed to the positioning structure 334b' by adhesive, snapping or other means, such that the support member 313' The side wall 314' may not need to have a positioning hole on the bottom surface. That is, the structure of the support member 313' may be the same as that of the above-described support member 213.

In summary, the backlight module and the display device of the present invention have at least the following advantages:

1. In the backlight module and the display device of the present invention, the plastic frame is replaced by a plurality of support members, because the material of the support member is less, the material cost can be reduced, and the weight of the backlight module and the display device can be reduced.

2. In the present invention, since the support member does not extend to the outside of the backing plate, the width of the cover portion of the front frame can be effectively reduced, and the display device of the present invention has the advantage of narrowing the edge.

3. In an embodiment, the support member can be directly fixed to the casing, so that the display device can eliminate the need for the backboard and the front frame, thereby saving the cost of the backboard and the front frame and reducing the weight of the display device.

While the present invention has been described in its preferred embodiments, the present invention is not intended to limit the invention, and the present invention may be modified and modified without departing from the spirit and scope of the invention. The scope of protection is subject to the definition of the scope of the patent application.

100. . . Conventional liquid crystal display device

110. . . Backlight module

111. . . Backplane

112. . . Light guide

113. . . Plastic frame

114. . . Trench

115. . . Carrying part

116. . . Side wall

117. . . Optical diaphragm

120. . . LCD panel

130. . . Front frame

131. . . Cover

200, 300. . . Display device of the invention

210, 310. . . Backlight module

212, 312. . . Optical parts

213, 213', 313, 313'. . . supporting item

213a. . . Turning place

214, 314, 314'. . . Side wall

214a. . . first part

214b‧‧‧Part II

215‧‧‧Support

216‧‧‧ Backplane

216a‧‧‧ bottom

216b‧‧‧ side wall

217‧‧‧reflector

218‧‧‧Optical diaphragm

220, 320‧‧‧ display panel

230‧‧‧ front box

231‧‧‧ 盖部

232‧‧‧ side wall

314a‧‧‧ bottom

314b‧‧‧Positioning holes

330‧‧‧Chassis

332‧‧‧First housing

333‧‧‧ second housing

334‧‧‧ bottom

334a‧‧‧ bearing surface

334b, 334b'‧‧‧ positioning structure

334c‧‧‧ gap

335‧‧‧ side wall

336‧‧ ‧ cover

337‧‧‧ side wall

D1, D2‧‧‧ width

T1, T2‧‧‧ wall thickness

FIG. 1 is a perspective exploded view of a conventional display device.

2 is a partial cross-sectional view of the display device of FIG. 1.

3 is a perspective exploded view of a display device according to an embodiment of the invention.

4 is a partial, perspective, cross-sectional view of the display device of FIG. 3.

FIG. 5 is a perspective view of the support member of the display device shown in FIG. 3. FIG.

FIG. 6 is a perspective view of a support member of a display device according to another embodiment of the present invention.

FIG. 7 is a partial cross-sectional view showing a display device according to another embodiment of the present invention.

FIG. 8 is a top plan view of a display device according to another embodiment of the present invention.

200. . . Display device

210. . . Backlight module

212. . . Optical parts

213. . . supporting item

214. . . Side wall

214a. . . first part

214b. . . the second part

215. . . Support

216. . . Backplane

216a. . . bottom

216b. . . Side wall

217. . . A reflective sheet

218. . . Optical diaphragm

220. . . Display panel

230. . . Front frame

231. . . Cover

232. . . Side wall

D2. . . width

Claims (15)

A backlight module includes: an optical component; and a plurality of support members disposed on an edge of the optical component, each support member having a sidewall and a support portion, the sidewall being located beside the edge of the optical component, and the support portion Extending from the sidewall toward the optical member and bearing over the optical member, the sidewall having a first portion below the support portion and a second portion above the support portion; wherein the first portion of the sidewall bears On the side of the optical member. The backlight module of claim 1, wherein the first portion has a wall thickness greater than a thickness of the second portion. The backlight module of claim 1, wherein each support member is disposed at a corner of the optical member, and each support member has a turning portion to support the first portion to the optical member. Adjacent to the sides. The backlight module of claim 1, wherein the support member is made of an elastic material. The backlight module of claim 1, further comprising a backing plate, the optical component and the supporting members are disposed on the backboard, the backing plate has a connected bottom and a side wall, each supporting The side wall of the piece bears against the bottom and the side wall of the backing plate. The backlight module of claim 5, wherein the side wall of each support member is adhered to the bottom portion and the side wall of the back plate through a glue. A display device comprising: a backlight module comprising: an optical component; and a plurality of support members disposed on an edge of the optical component, each support member having a sidewall and a support portion, the sidewall being located at an edge of the optical component And the support portion extends from the sidewall toward the optical member and bears over the optical member, the sidewall having a first portion below the support portion and a second portion above the support portion, and the second portion One portion bears against a side of the optical member; the support portion bears above the optical member; and a display panel is disposed on the support portions. The display device of claim 7, wherein the first portion has a wall thickness greater than a thickness of the second portion. The display device of claim 7, wherein each support member is disposed at a corner of the optical member, and each support member has a turning portion such that the first portion is located adjacent to the optical member. Beside the sides. The display device of claim 7, wherein the support member is made of an elastic material. The display device of claim 7, wherein the backlight The module further includes a backing plate, the optical component and the supporting members are disposed on the backing plate, the backing plate has a connected bottom and a side wall, and the side wall of each supporting member bears against the backing plate The bottom and the side wall. The display device of claim 11, wherein the side wall of each support member is adhered to the bottom portion and the side wall of the back plate through a colloid. The display device of claim 11, further comprising a front frame coupled to the back panel to encapsulate the backlight module and the display panel. The display device of claim 6, further comprising a casing, the casing comprising: a first casing having a bearing surface, the backlight module being disposed on the bearing surface, the bearing surface a positioning structure is provided to fix the support portions of the backlight module, a gap exists between the positioning structure and the edge of the bearing surface; and a second housing is coupled to the first housing to cover The backlight module and the display panel. The display device of claim 14, wherein the side wall of each support member has a bottom surface facing the bearing surface, the bottom surface is provided with at least one positioning hole, and the positioning structure comprises a plurality of positioning posts, respectively inserted In these positioning holes.