CN1532604A - Liquid crystal display device having a plurality of pixel electrodes - Google Patents

Abstract

A liquid crystal display device (LCD device) includes a liquid crystal display panel (LCD panel), a backlight unit (BLU) disposed below the liquid crystal display panel, and a carrier bezel for assembling the liquid crystal display panel and the backlight unit. The carrier bezel includes a plurality of alignment devices disposed on an upper inner surface of the carrier bezel for fixing the liquid crystal display panel within the carrier bezel.

Description

Liquid crystal display device

technical field

The present invention provides a liquid crystal display device (LCD device), especially a device comprising a plurality of liquid crystal display panels (LCD panel) which can be horizontally fixed on a carrier bezel (carrier bezel). The liquid crystal display device within the positioning device.

Background technique

Backlight module is one of the key components of LCD products, and has been widely used in digital cameras, digital personal assistants (PDAs), satellite navigation systems, computer monitors and flat-screen TVs. Generally speaking, the backlight module used for liquid crystal display products has a light source generator (light source generator) and a diffusing plate (diffusing plate), in order to provide a uniformly dispersed light to the display panel, and then control the light on the display panel pixel electrodes to form the appropriate image. Wherein, the backlight module can be divided into a direct illuminance backlight module whose light source is directly below the display panel or an edgelight backlight module whose light source is near the side of the display panel according to the location of the light source. Since the edge-lit backlight module is provided with a light source generator on the side of the light guide plate, it can be applied to liquid crystal display products that require a smaller size, so it is increasingly popular.

Please refer to FIG. 1 , which is an exploded schematic diagram of a known liquid crystal display device (LCD device) 10 . As shown in FIG. 1, the liquid crystal display device 10 includes a liquid crystal display panel (LCD panel) 12, a back light module (back light unit, BLU) 14 located at the bottom of the liquid crystal display panel 12, and a liquid crystal display panel for assembling (assemble) A carrier bezel 16 of the display panel 12 and the backlight module 14 .

Usually, the liquid crystal display panel 12 is used to display an image and its exterior is usually made of a glass shell, and the backlight module 14 then includes a light guide plate (light guide plate, LGP) 18, a set on the light guide plate 18 A light source generator (light source generator) 20 on one side, a reflective sheet (reflecting sheet) 22 located below the light guide plate 18, a diffusing plate (diffusing plate) 24 located above the light guide plate 18, and at least one A prism 26 disposed above the diffuser plate 24 . The light source generator 20 is used to provide a light source, and is usually a light emitting diode (light emitting diode, LED) or a cold cathode fluorescent lamp (cold cathode fluorescent lamp, CCFL). The reflection plate 22 is made of a thin sheet coated with a metal material, and is used to reflect the light source generated by the light source generator 20 upwards to the light guide plate 18, and the light guide plate 18 can scatter the light source to Diffusion plate 24. The diffuser plate 24 is used to scatter the light source upward to the LCD panel 12 , and the prism 26 is used to correct the scattered light source so that it has a uniform intensity. The supporting frame 16 is an elastic frame made of metal or plastic, and includes a plurality of baffles 28 located on two opposite lower sides for supporting the liquid crystal display panel 12 and the backlight module 14 .

Please refer to FIG. 2 . FIG. 2 is a schematic cross-sectional view along the a-a′ axis when the loading frame 16 in FIG. 1 is assembled with the liquid crystal display panel 12 and the backlight module 14 . As shown in FIG. 2 , the carrying frame 16 includes a plurality of baffles 28 positioned at two opposite lower sides for supporting the liquid crystal display panel 12 and the backlight module 14, and also includes a plurality of alignment devices. ) 30 (not shown in FIG. 1 ) are disposed on each upper corner of the supporting frame 16 (upper corner). As shown in FIG. 2, the above-mentioned positioning device 30 is a protrusion. When the liquid crystal display panel 12 and the backlight module 14 are assembled in the carrying frame 16, the liquid crystal display panel 12 will generate a first upward movement to the carrying frame 16. Stress F1. As mentioned above, since the supporting frame 16 is an elastic frame, the positioning device 30 will be slightly deformed due to the extrusion of the first stress F1. Relatively speaking, at this time, the positioning device 30 will also generate a second stress F2 acting on an upper surface 12a of the liquid crystal display panel 12 corresponding to the first stress F1, and fix the liquid crystal display panel 12 vertically. within the carrying frame 16 .

With the advancement of science and technology, various electronic products are developing in the direction of thinner, lighter, smaller and more refined. Therefore, for liquid crystal display products, size reduction is an unshakable and necessary trend. However, as shown in FIG. 2 , the above-mentioned liquid crystal display device 10 utilizes the positioning devices 30 located at the four corners of the supporting frame 16 to press down, and the liquid crystal display panel 12 is fixed vertically on the supporting frame 16 Therefore, there must be a gap 32 between the display panel 12 and the supporting frame 16 , which increases the thickness of the liquid crystal display device 10 . In addition, because the first stress F1 generated by the positioning device 30 for vertically fixing the display panel 12 only acts on the four corners of the supporting frame 16 instead of acting on the display panel 12 in a multi-point and uniform manner, Therefore, the effect of fixing the display panel 12 is greatly reduced. After a long period of use, the components such as the light guide plate 18, the light source generator 20, the reflector 22, the diffuser plate 24, and the prism 26 of the backlight module 14 are prone to shifting, resulting in the liquid crystal display device 10. The display quality has dropped significantly, seriously affecting the competitiveness of products in the market.

Contents of the invention

Therefore, the main purpose of the present invention is to provide an improved liquid crystal display device (LCD device) to solve the above-mentioned problem of shifting of various elements in the conventional liquid crystal display device.

In a preferred embodiment of the present invention, the liquid crystal display device includes a liquid crystal display panel (LCD panel), a backlight unit (BLU) and a carrier bezel. The backlight module is arranged under the liquid crystal display panel, and the carrying frame is used to assemble the liquid crystal display panel and the backlight module. The backlight module includes a light guide plate (LGP), a light source generator (light source generator) disposed on one side of the light guide plate, and a reflecting sheet (reflecting sheet) disposed below the light guide plate. , a diffusing plate (diffusing plate) arranged above the light guide plate, and at least one prism (prism) arranged above the diffusing plate. The carrying frame includes a plurality of alignment devices arranged on an upper inner surface of the carrying frame for fixing the liquid crystal display panel in the carrying frame in a horizontal direction.

Because the liquid crystal display device of the present invention utilizes the positioning device with horizontal direction stress to apply a first stress F3 on an outer surface of the liquid crystal display panel through multiple points on average, so that the liquid crystal display panel is fixed on the supporting frame Within, the displacement phenomenon of the light guide plate, the light source generator, the reflection plate, the diffuser plate and the prism of the backlight module can be avoided, so the display quality of the liquid crystal display device can be ensured. In addition, since the positioning device of the present invention is located on the upper inner surface of the carrying frame, the low-cost planar injection molding technology can be used to manufacture the carrying frame, and the positioning device with horizontal stress of the present invention can be used. The device can further reduce the thickness of the liquid crystal display device, which is conducive to the trend of thinning the display, thereby greatly improving the competitiveness of the product in the market.

Description of drawings

FIG. 1 is an exploded schematic diagram of a conventional liquid crystal display device.

FIG. 2 is a schematic cross-sectional view along the a-a axis when the loading frame 16 in FIG. 1 is assembled with the liquid crystal display panel 12 and the backlight module 14 .

FIG. 3 is an exploded schematic view of the liquid crystal display device of the present invention.

FIG. 4 is a partially enlarged schematic view of the supporting frame 56 in FIG. 3 in a preferred embodiment of the present invention, before the liquid crystal display panel 52 and the backlight module 54 are assembled.

FIGS. 5 to 7 are partially enlarged schematic diagrams of the supporting frame 56 in FIG. 3 in other embodiments of the present invention when the liquid crystal display panel 52 and the backlight module 54 are not assembled.

FIG. 8 is a schematic cross-sectional view along the b-b axis when the loading frame 56 in FIG. 4 is assembled with the liquid crystal display panel 52 and the backlight module 54 .

Explanation of reference signs

10 Liquid crystal display device 12 Liquid crystal display panel

12a upper surface 14 backlight module

16 Bearing frame 18 Light guide plate

20 light source generator 22 reflector

24 diffuser plate 26 prism

28 baffle 30 positioning device

32 Gap F1 first stress

F2 second stress 50 liquid crystal display device

52 liquid crystal display panel 52a outer surface

54 backlight module 56 carrying frame

56a upper inner surface 58 light guide plate

60 light source generator 62 reflectors

64 diffuser plate 66 prism

68 baffle 70 positioning device

74 positioning bolt 76 relying on the broken hole

F3 first stress F4 second stress

Detailed ways

Please refer to FIG. 3 . FIG. 3 is an exploded schematic diagram of a liquid crystal display device (LCD device) 50 of the present invention. As shown in Figure 3, the liquid crystal display device 50 includes a liquid crystal display panel (LCD panel) 52, a backlight module (back lightunit, BLU) 54 located at the bottom of the liquid crystal display panel 52 and a liquid crystal display panel for assembling (assemble) A carrier bezel 56 of the panel 52 and the backlight module 54 .

Usually, the liquid crystal display panel 52 is used to display an image and its exterior is usually made of a glass shell, while the backlight module 54 includes a light guide plate (light guide plate, LGP) 58, a set on the light guide plate 58 A light source generator (light source generator) 60 on the side, a reflective sheet (reflecting sheet) 62 located below the light guide plate 58, a diffusing plate (diffusing plate) 64 located above the light guide plate 58, and at least one device A prism 66 above the diffuser plate 64 . The light source generator 60 is used to provide a light source, and is usually a light emitting diode (light emitting diode, LED) or a cold cathode fluorescent lamp (cold cathode fluorescent lamp, CCFL). The reflection plate 62 is made of a thin sheet coated with a metal material, and is used to reflect the light source generated by the light source generator 60 upwards to the light guide plate 58, and the light guide plate 58 can scatter the light source to diffuser plate 64 . The diffuser plate 64 is used to scatter the light source upward to the LCD panel 52 , and the prism 66 is used to correct the scattered light source so that it has a uniform intensity. The supporting frame 56 is an elastic frame made of metal or plastic, and includes a plurality of baffles 68 located on two opposite lower sides for supporting the liquid crystal display panel 52 and the backlight module 54, And a plurality of alignment devices (alignment device) 70. In addition, in another embodiment of the present invention, the backlight module 54 may also include a housing (housing, not shown) disposed below the reflector 62 and covering the reflector 62 to strengthen and fix the backlight module. The light guide plate 58 , the light source generator 60 , the reflection plate 62 , the diffuser plate 64 and the prism 66 of the group 54 . Since this item is not the key point of the present invention, it will not be described in detail here.

Please refer to FIG. 4 to FIG. 7, FIG. 4 to FIG. 7 are partially enlarged schematic diagrams of the carrying frame 56 provided with a plurality of positioning devices 70 (for convenience of description, the liquid crystal display panel 52 and the backlight module 54 have not yet been assembled on the carrying frame 56 ), and wherein Fig. 4 is a preferred embodiment utilized in the device of the present invention. As shown in FIGS. 4 to 7 , the loading frame 56 includes a plurality of baffles 68 (not shown in FIGS. ), it also includes a plurality of positioning devices 70, which are arranged on each side of the bearing frame 56 or on an upper inner surface 56a of two opposite sides where the non-light source generator 60 is located. As shown in FIG. 4 , in a preferred embodiment of the present invention, the positioning device 70 is a breakout structure including at least one positioning pin 74 and a breakout hole 76 accommodating the positioning pin 74 . Please refer to FIG. 8 , which is a schematic cross-sectional view along the b-b′ axis of the carrying frame 56 in FIG. 4 when the liquid crystal display panel 52 and the backlight module 54 are assembled in the carrying frame 56 . As shown in FIG. 8 , when the liquid crystal display panel 52 and the backlight module 54 are assembled in the supporting frame 56 , the liquid crystal display panel 52 will generate a horizontal first stress F3 on the positioning pin 74 of the supporting frame 56 . As mentioned above, since the supporting frame 56 is an elastic frame, the positioning pins 74 will be deformed due to the extrusion of the first stress F3 at this time, so that most of the positioning pins 74 are accommodated in the frame shown in FIG. 4 . In the perforation 76 (not shown in FIG. 8 ). Relatively speaking, at this time, the positioning pin 74 will also generate a second stress F4 acting on an outer surface 52a of the liquid crystal display panel 52 corresponding to the first stress F3, and the liquid crystal display panel 52 will be horizontally positioned (laterally). It is fixed inside the carrying frame 56 .

In addition, as shown in FIGS. 5 to 7 , in other embodiments of the present invention, the positioning device 70 can also be a protrusion (as shown in FIG. 5 ), or an arc clip arranged in different directions. Tooth (clamp, as shown in Figure 6 and Figure 7). Since the mode of action of the positioning device 70 in FIGS. 5 to 7 is identical to that of the positioning device 70 in FIGS. The liquid crystal display panel 52 is fixed in the supporting frame 56 in the horizontal direction due to the stress of the reaction force, so no further details are given here.

Compared with the original liquid crystal display device 10, the liquid crystal display device 50 of the present invention uses the positioning device 70 to apply the first stress F3 on the outer surface of the liquid crystal display panel 52 on average through multiple points in the horizontal direction so that the liquid crystal display panel 52 is fixed within the carrying frame 56, thereby avoiding the phenomenon of shifting of the light guide plate 58, the light source generator 60, the reflector 62, the diffusion plate 64 and the prism 66 of the backlight module 54, etc. The display quality of the liquid crystal display device 50 is ensured. In addition, since the positioning device 70 is located on the upper inner surface 56a of the carrying frame 56, the manufacturing of the carrying frame 56 can adopt a relatively low-cost planar injection molding technique, and utilize the positioning device with horizontal stress of the present invention 70 can further reduce the thickness of the liquid crystal display device 50, which is conducive to the trend of thinning displays, thereby greatly enhancing the competitiveness of products in the market.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and improvements made according to the claims of the present invention shall fall within the scope of the patent of the present invention.

Claims (12)

1. a liquid crystal indicator (liquid crystal display device, LCD device) includes:

One display panels (LCD panel);

One module backlight (back light unit, BLU), it is located at this display panels below; And

One carrying frame (carrier bezel) is provided with a plurality of lateral register devices (alignment device) on inner surface on the one, fix this display panels and this module backlight in order to assembling (assemble).

2. as the described liquid crystal indicator of claim l, wherein this module backlight includes:

One light guide plate (light guide plate, LGP);

One light source generator (light source generator), the side that it is located at this light guide plate is used to provide a light source;

One reflecting plate (reflecting sheet), it is located at the below of this light guide plate, upwards reflects (reflect) to this light guide plate in order to the light source that this light source generator is produced;

One diffuser plate (diffusing plate), it is located at the top of this light guide plate, in order to scattering (scatter) that this light source is made progress to this display panels; And

At least one prism (prism), it is located at this diffuser plate top.

3. liquid crystal indicator as claimed in claim 1, wherein this carrying frame is the frame for a tool elasticity (elastic).

4. liquid crystal indicator as claimed in claim 3, wherein this carrying frame includes a metal frame or a plastic cement frame.

5. liquid crystal indicator as claimed in claim 3, wherein this carrying frame also includes a plurality of baffle plates that are positioned at two relative lower sides, in order to support this display panels and this module backlight.

6. liquid crystal indicator as claimed in claim 2, wherein this locating device is one to include the breaking structure in an at least one pilot pin and a breaking hole.

7. liquid crystal indicator as claimed in claim 2, wherein this locating device is a projection cube structure.

8. liquid crystal indicator as claimed in claim 2, wherein this locating device is folder tooth (clamp) structure.

9. liquid crystal indicator as claimed in claim 2, wherein this module backlight includes a shell (housing) in addition, and it is located at this reflecting plate below and coats this reflecting plate.

10. liquid crystal indicator as claimed in claim 2, wherein this light source generator comprise a light emitting diode (light emitting diode, LED).

11. liquid crystal indicator as claimed in claim 2, wherein this light source generator comprise a cathode fluorescent tube (cold cathode fluorescent lamp, CCFL).

12. liquid crystal indicator as claimed in claim 2, wherein this reflecting plate is the thin slice (metal sheet) that a surface-coated has a metal level.

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