TWI489181B - Display and backlight module thereof - Google Patents

Description

Display device and backlight module thereof

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

Since the liquid crystal display (LCD) has a thinner thickness, a lighter weight, a convenient carrying, and a lower radiation than the cathode ray tube (CRT) display, the demand in recent years has rapidly increased. In particular, the backlight module (Baclklight Module) is one of the key components of the liquid crystal display device. With the improvement of the manufacturing technology of the liquid crystal display device, the backlight module is more oriented toward the market of thinning, high brightness and low cost. In order to maintain the competitiveness of the liquid crystal display device in the future market, developing and designing a better quality backlight module is a direction that needs to be worked hard in the future.

Since the connector for electrically connecting the backlight module and the system end is disposed at a corner of the back frame, the optical film needs to be cut off at a corner corresponding to the back frame to open the connector and avoid the optical film. Interference with the connector. However, in order to achieve the narrow frame and the reduced volume of the liquid crystal display device, the light source module located beside the carrying portion of the frame is close to the visible area of the liquid crystal display panel, and the cutting edge of the truncated angle of the optical film has a certain The thickness will converge, resulting in a bright line at the cut edge of the truncated angle of the optical film, thus causing bright lines on the display screen and Light leakage, the display quality can not meet the specifications.

In view of the above, the main purpose of the present invention is to provide a backlight module and a display device for solving the light leakage problem encountered by the conventional backlight module, and effectively reducing the light leakage without changing the size of the frame. .

In order to achieve the above object, the present invention provides a frame having a frame body and a carrying portion. The frame body is located at the periphery of the carrying portion and the frame body is connected to the carrying portion. The carrying portion has a first surface and a second surface opposite to the first surface. The first surface corresponds to a corner of the bearing portion at a right angle, the second surface corresponds to an arc angle at the corner, and the position where the arc angle is projected on the first surface is located between the right angle and the outer edge of the carrier portion.

The advantage of applying the disclosure is that the frame design can achieve the purpose of narrow frame and volume reduction of the liquid crystal display device, and avoid the occurrence of bright lines and light leakage.

The advantages and spirit of the present invention will be further understood from the following detailed description of the invention.

10‧‧‧ display device

100‧‧‧Backlight module

110‧‧‧Frame

111‧‧‧ frame

113‧‧‧Loading Department

114‧‧‧ corner

200‧‧‧ first side

220‧‧‧ second side

240‧‧‧First side wall

250‧‧‧second side wall

241‧‧‧ first side

242‧‧‧ second side

251‧‧‧ third side

210‧‧‧The outer edge of the load-bearing part

271‧‧‧First skirt

272‧‧‧Second skirt

170‧‧‧LCD panel

180‧‧‧ front box

120‧‧‧Optical diaphragm

121‧‧‧Glossy

122‧‧‧ cutting edge

130‧‧‧Light guide plate

140‧‧‧reflector

150‧‧‧Light source module

151‧‧‧Connector

152‧‧‧Light source

252‧‧‧ fourth side

2421‧‧‧First horizontal section

2521‧‧‧Second horizontal section

2422‧‧‧First bend

2522‧‧‧second bend

270‧‧‧ skirt

273‧‧‧ arc

160‧‧‧ Back frame

153‧‧‧ circuit board

154‧‧‧Colloid

P1‧‧‧ first endpoint

P2‧‧‧ second endpoint

P4‧‧‧ midpoint

I1‧‧‧ first intercept point

I2‧‧‧ second intercept point

112, 260‧‧‧ blocks

FIG. 1A is a schematic exploded view of a display device according to an embodiment of the present invention.

FIG. 1B is a schematic view showing a display device in an embodiment of the present invention.

Fig. 2 is a cross-sectional view taken along line A-A of Fig. 1B.

3A and 3B are schematic views showing corners of a carrier portion in an embodiment of the present invention.

Figure 4 is a bottom plan view showing a corner of a carrier portion in an embodiment of the present invention.

Hereinafter, a backlight module used in a display device will be described as an example, but It is not intended to limit the application surface of the backlight module of the present invention.

FIG. 1A is a schematic exploded view of a display device according to an embodiment of the present invention. FIG. 1B is a schematic view showing a display device in an embodiment of the present invention. Fig. 2 is a cross-sectional view taken along line A-A of Fig. 1B. Referring to FIG. 1A, FIG. 1B and FIG. 2 simultaneously, the display device 10 includes a front frame 180, a liquid crystal display panel 170, and a backlight module 100. The backlight module 100 has a frame 110, a back frame 160, an optical film 120, a light guide plate 130, a reflection sheet 140, and a light source module 150. The optical film 120, the light guide plate 130, the reflection sheet 140, and the light source module 150 are disposed on Inside the back frame 160. The frame 110 has a frame body 111 and a bearing portion 113. The frame body 111 is located at the periphery of the bearing portion 113 and the frame body 111 is connected to the bearing portion 113. The frame body 111 surrounds the optical film 120, the light guide plate 130 and the light source module 150, and the like. The portion 113 has a first surface 200 and a second surface 220 opposite to the first surface 200. The first surface 200 is used to carry the liquid crystal display panel 170, and the second surface 220 is pressed against the light emitting surface 121 of the optical film 120. A spacer 112 may be disposed on the first surface 200, and a spacer 260 may be disposed on the second surface 220 to provide a buffering and shock absorbing effect, thereby avoiding the liquid crystal display panel 170 and the optical film during handling or assembly. The 120 collides with the frame 110 and is damaged. The material of the blocks 112, 260 may be an elastic material such as foam, silicone, rubber or plastic.

The light source module 150 is disposed in the back frame 160, and has a connector 151 (FIG. 1A), a light source 152, and a circuit board 153. The connector 151 is used for electrically connecting the backlight module 100 to the system end, and the connector 151 is configured. Below one of the corners 114 of the load bearing portion 113. The light source 152 is electrically connected to the circuit board 153 and disposed within the back frame 160 by the glue 154. The backlight module 100 can be designed in different manners such as a direct type or a side-in type light source, and the light source 152 used can be a light-emitting diode (LED), a cathode ray tube or other kinds of points. Light Source, line source or surface source. In the embodiment shown in FIG. 2, the backlight module 100 adopts a design of a side-entry light source. The light source module 150 is adjacent to the light guide plate 130. The light emitted from the light source 152 of the light source module 150 passes through the light guide plate 130 and the reflective sheet. 140 to produce a uniform light distribution. The optical film 120 includes a diffusion sheet, a brightness enhancement film or other film, and the light output from the light source module 150 can be adjusted to meet the design requirements.

3A and 3B are schematic views showing corners of a carrier portion in an embodiment of the present invention. Figure 4 is a bottom plan view showing a corner of a carrier portion in an embodiment of the present invention. For convenience of explanation, the optical film 120 is shown in Figs. 3A and 3B. Referring to FIG. 3A, FIG. 3B and FIG. 4 simultaneously, the first surface 200 of the corner 114 of the frame 110 is a right angle, the second surface 220 is an arc angle, and the arc angle is projected at the position of the first surface 200. Between the right angle and the outer edge 210 of the carrying portion 113, that is, the first surface 200 is at a right angle to the corner 114, the second surface 220 is at an arc angle at the corner 114, and the edge of the arc angle is at the first surface 200. The projected position does not overlap the edge of the right angle.

Further, the corner 114 has a first sidewall 240, a second sidewall 250, and a skirt 270, and the first sidewall 240, the second sidewall 250, and the skirt 270 are located between the first surface 200 and the second surface 220, and the first sidewall The second side wall 240 has a first side 241 and a second side 242. The first side 241 is connected to the first side 200 and the second side 242 is connected to the upper edge of the skirt 270. The side wall 250 has a third side 251 and a fourth side 252. The third side 251 is connected to the first side 200 and the fourth side 252 is connected to the upper edge of the skirt 270, and the lower edge of the skirt 270 is connected to the second side 220. . In other words, the first surface 200 is a right angle corner formed by the first side 241 and the third side 251 perpendicular to each other, and the second side 242 and the fourth side 252 are also the upper edges of the skirt 270.

The second side 242 of the first side wall 240 is a curve, and the second side 242 has a first intercept point I1, a first horizontal section 2421 and a first bending section 2422. The first intercept point I1 is located in the first horizontal section 2421 and the first Between the first section I1 and the first side wall 240 and the second side wall 250, the first bending section 2422 is separated from the first section I22 and away from the first side wall 240 and the second side wall 250. The junction is the first horizontal segment 2421. The first intercept point I1 is the end point of the first bending section 2422 and is the starting point of the first horizontal section 2421, and the first horizontal section 2421 is tangent to the first bending section 2422 to the first intercept point I1. In addition, the shortest distance from any point on the first horizontal section 2421 of the first side wall 240 to the first side 241 is equal. The shortest distance from any point on the first bent section 2422 to the first side 241 is unequal length, and the closer the shortest distance between the first side wall 240 and the second side wall 250 is gradually increased. Similarly, the fourth side 252 of the second side wall 250 of the carrying portion 113 is a curve, and the fourth side 252 has a second intercept point I2, a second horizontal section 2521 and a second bending section 2522, and the second intercept point I2 is located at the Between the second horizontal section 2521 and the second bending section 2522, the second bending section 2522 is connected from the second intercept point I2 to the first side wall 240 and the second side wall 250, and is away from the second intercept point I2. A side wall 240 is in contact with the second side wall 250 as a second horizontal section 2521. The second intercept point I2 is the end point of the second bending section 2522 and is the starting point of the second horizontal section 2521, and the second horizontal section 2521 is tangent to the second bending section 2522 to the second intercept point I2. In addition, the shortest distance from any point to the third side 251 of the second horizontal section 2521 of the fourth side 252 is equal, and any point on the second bending section 2522 of the fourth side 252 of the second side wall 250 to the third side 251 The shortest distance is unequal length, and the shortest distance closer to the junction of the first side wall 240 and the second side wall 250 is gradually increased. It should be noted that the first bending section 2422 of the second side 242 of the first sidewall 240 is bent from the first intercept point I1 to the direction where the first sidewall 240 and the second sidewall 250 meet, and the second sidewall 250 Second bend 2522 of the fourth side 252 From the second intercept point I2 to the direction in which the first side wall 240 and the second side wall 250 meet, the first bending section 2422 intersects the second bending section 2522 at a first end point P1.

The lower edge of the skirt 270 is connected to the second surface 220 and corresponds to the first side wall 240 and the second side wall 250 being joined by a circular arc 273, and on the two sides of the circular arc 273 and the first skirt 271 and the first The two skirt edges 272 are connected, and the virtual extension lines of the first skirt 271 and the second skirt 272 extend toward the first sidewall 240 and the second sidewall 250. As shown in FIG. 4, they intersect at a virtual The second end point P2, the position of the second end point P2 will be located on the second side 220 between the arc 273 and the outer edge 210 of the carrier 113. It can be seen that if the second surface 220 is at a right angle to the corner 114, the position of the right angle is at the second end point P2 of the virtual end point. In the three-dimensional structure, the arc 273 is substantially partially spherical with the first sidewall 240 and the second sidewall 250, and the spherical portion protrudes from the first end point P1 into the carrying portion 113, as shown in FIG. 3A. As shown in FIG. 4, the optical film 120 is cut off by a truncated angle to allow the connector 151 to be opened to prevent the optical film 120 from interfering with the connector 151. The structure of the portion of the sphere can cover the cut edge 122 of the truncated angle of the optical film 120, preventing the bright line from being caused by the condensing of the cutting edge 122. In other words, the projected position of the truncated edge 122 of the optical film 120 on the second face 220 is between the arc angle and the outer edge 210 of the carrier 113.

It should be noted that the closer the distance from the midpoint P4 of the arc 273 to the second endpoint P2 of the virtual end point, the worse the bright line effect produced by the cut edge 122 of the truncated angle of the optical film 120 is. On the contrary, the better, but still can be adjusted according to the route of the optical path and the display device to achieve the best shielding light leakage effect, improve the display quality of the display device.

In addition, the design of the corner 114 of the frame 110 is not limited to the corresponding setting. The corners of the connector 151 of the light source module 150 may also be disposed at other corners of the frame 110. In other words, it can also be designed for a corner above the invention, depending on the needs of the user. The above embodiment can also be applied to an embodiment of a direct type light source module not shown.

The present invention has been described by the above-described related embodiments, but the above embodiments are merely examples for implementing the present invention. It must be noted that the disclosed embodiments do not limit the scope of the invention. On the contrary, modifications and equivalents of the spirit and scope of the invention are included in the scope of the invention.

110‧‧‧Frame

111‧‧‧ frame

113‧‧‧Loading Department

114‧‧‧ corner

200‧‧‧ first side

220‧‧‧ second side

240‧‧‧First side wall

250‧‧‧second side wall

241‧‧‧ first side

242‧‧‧ second side

251‧‧‧ third side

150‧‧‧Light source module

151‧‧‧Connector

152‧‧‧Light source

153‧‧‧ circuit board

P1‧‧‧ first endpoint

252‧‧‧ fourth side

2421‧‧‧First horizontal section

2521‧‧‧Second horizontal section

112, 260‧‧‧ blocks

2422‧‧‧First bend

2522‧‧‧second bend

270‧‧‧ skirt

210‧‧‧The outer edge of the load-bearing part

I1‧‧‧ first intercept point

I2‧‧‧ second intercept point

122‧‧‧ cutting edge

120‧‧‧Optical diaphragm

121‧‧‧Glossy

271‧‧‧First skirt

272‧‧‧Second skirt

273‧‧‧ arc

Claims (10)

A frame includes: a frame; and a bearing portion, the frame is located at a periphery of the bearing portion, and the frame is connected to the bearing portion, the bearing portion has a first surface and a first surface opposite to the first surface On the two sides, the first surface corresponds to a corner of the bearing portion as a right angle, the second surface corresponds to an arc angle at the corner, and the arc angle is projected on the first surface at the right angle and the Between the outer edges of the load-bearing parts. The frame of claim 1, wherein the carrying portion has a first side wall, a second side wall and a skirt, the first side wall and the second side wall are adjacent to the corner, the first side wall has a a first side and a second side, the first side is connected to the first side and the second side is connected to the upper edge of the skirt, the second side has a third side and a fourth side, the first side The three sides are connected to the first side and the fourth side is connected to the upper edge of the skirt, and the lower edge of the skirt is connected to the second side. The frame of claim 2, wherein the first side and the third side are perpendicular to each other. The frame of claim 2, wherein the second side has a first intercept point, a first horizontal section and a first bending section, the first intercept point being located in the first horizontal section and the first corner Between the folding segments, the shortest distance from any point on the first horizontal segment to the first edge is equal, and the shortest distance from any point on the first bending segment to the first edge is unequal length, and the closer to the corner The shortest distance is increasing. The frame of claim 4, wherein the fourth side has a second intercept point, a second horizontal section and a second bending section, the second intercept point is located in the second horizontal section and the second corner Folding segment The shortest distance from any point on the second horizontal segment to the first side is equal, and the shortest distance from any point on the second bending segment to the first side is unequal length, and the closer to the corner is the shortest The distance is increasing. The frame of claim 2, wherein the lower edge of the skirt is an arc at the corner. The frame as claimed in claim 5, wherein the first bending segment intersects the second bending segment at a first end point. The frame of claim 6, wherein the lower edge of the skirt has a first skirt and a second skirt, the first skirt and the second skirt being located on both sides of the arc and The arcs are connected, the virtual extension lines of the first skirt and the second skirt intersect at a second end point at the corner, and the second end point is located between the arc and the outer edge of the carrier . The frame of claim 6, wherein the arc intersects the first side wall and the second side wall to form a partial spherical surface, and the partial spherical surface protrudes toward the frame at the first end point. A backlight module comprising: the frame of claim 1, an optical film having a truncated angle, the projected position of the cut edge of the truncated angle being located outside the arc angle and the carrying portion Between the edges; and a light source module, a connector of the light source module is disposed below the corner.