CN102043276A - Liquid crystal display (LCD) - Google Patents
Liquid crystal display (LCD) Download PDFInfo
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- CN102043276A CN102043276A CN200910236450XA CN200910236450A CN102043276A CN 102043276 A CN102043276 A CN 102043276A CN 200910236450X A CN200910236450X A CN 200910236450XA CN 200910236450 A CN200910236450 A CN 200910236450A CN 102043276 A CN102043276 A CN 102043276A
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- adhesive layer
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- light guide
- optical film
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Abstract
The invention relates to a liquid crystal display (LCD) which comprises an LCD panel, a back light module, an optical film layer, an upper cover plate and a bottom back plate, wherein a light guide plate, the optical film layer and the LCD panel in the back light module are fixed together by adhesive layers. The light guide plate, the optical film layer and the LCD panel are fixed together by the adhesive layers, so that the whole strength of the LCD is improved, and the problems that the flatness is not easily guaranteed, and installation and fixation are more difficult when a thin light guide plate is in use can be solved; and furthermore, the assembly of the back light module and the assembly between the LCD panel and multiple peripheral parts can be manufactured in an integral way, so that integration of production can be realized.
Description
Technical field
The present invention relates to lcd technology, relate in particular to a kind of LCD.
Background technology
Along with LCD (Liquid Crystal display; Hereinafter to be referred as the LCD) widespread use of every field in modern society, people have higher requirement to the size and the thickness of original LCD, require the size of LCD big as far as possible, thickness is thin as far as possible.
The available liquid crystal display has direct liquid crystal panel for displaying images, drives the driving circuit (IC) of liquid crystal panel, as the upper cover plate and the end backboard of each component parts of the module backlight of the light source of LCD, fixing above-mentioned LCD.Wherein, module backlight comprises light source, optical film, light guide plate, reflector plate and glue frame etc., and optical film can comprise polaroid, diffusion sheet and prismatic lens etc.According to the position of light source, module backlight can be divided into side according to formula and straight-down negative.The advantage of side photograph formula is the thickness attenuation that the electric power of consumption is lower and make whole LCD.According to formula module backlight, light sources such as fluorescent light, light emitting diode are positioned at a side of light guide plate for side; The bottom of light guide plate has possessed to liquid crystal panel lateral reflection reflection of light sheet; Having on the top of light guide plate will be by the diffusion sheet of the light that penetrates to the liquid crystal panel side after the light guide plate refraction to a plurality of directions diffusions; Between diffusion sheet and liquid crystal panel, have the light by diffusion sheet is focused on prismatic lens in the positive angular field of view; Optical film, light guide plate, the stacked setting of reflector plate and be fixed in the glue frame.
But, in realizing process of the present invention, the inventor finds that there are the following problems at least in the prior art: for the large scale liquid crystal display, the thickness of light guide plate often determines the thickness of entire device, when installing and fixing light guide plate in order to guarantee its flatness, large-size light-conducting plate thickness is generally between 4mm～8mm at present, be lower than the light guide plate of 4mm for thickness, though its thickness can satisfy the requirement of slimming, but because insufficient strength, therefore be difficult for guaranteeing flatness that influence optical effect, difficulty installs and fixes simultaneously.
Summary of the invention
The purpose of this invention is to provide a kind of LCD, to realize the slimming of LCD.
For achieving the above object, the invention provides a kind of LCD, comprise liquid crystal panel, module backlight, optical film, upper cover plate and end backboard, wherein, light guide plate in the described module backlight, described optical film and described liquid crystal panel are fixed together by adhesive layer.
Four edges of four edges of described light guide plate and described liquid crystal panel, bond together by first adhesive layer, and described optical film is sandwiched between described light guide plate and the described liquid crystal panel, and described first adhesive layer is around in the outside of described optical film.
Described optical film is one deck compound film sheet; Between described light guide plate and the described compound film sheet, bond together by second adhesive layer; Between described compound film sheet and the described liquid crystal panel, bond together by the 3rd adhesive layer.
Described second adhesive layer is coated on the entire contact surface between described light guide plate and the described compound film sheet equably; Described the 3rd adhesive layer is coated on the entire contact surface between described compound film sheet and the described liquid crystal panel equably.
Between described light guide plate and the described optical film, bond together by described second adhesive layer; Between described optical film and the described liquid crystal panel, bond together by described the 3rd adhesive layer; Between each diaphragm in the described optical film, bond together by the 4th adhesive layer.
Described second adhesive layer is coated on the entire contact surface between described light guide plate and the described optical film equably; Described the 3rd adhesive layer is coated on the entire contact surface between described optical film and the described liquid crystal panel equably; Described the 4th adhesive layer is coated in the described optical film on the entire contact surface between each diaphragm equably.
Described upper cover plate and end backboard are provided with stationary installation, and described upper cover plate and end backboard are fixed together.
Described stationary installation is teat on the end backboard and the bayonet socket on the upper cover plate.
LCD of the present invention also comprises location structure, be fixed on the backboard of the described end, be positioned at the described light guide plate, optical film and the liquid crystal panel that are fixed together around, the described light guide plate, optical film and the liquid crystal panel that are used for being fixed together position fixing.
Described location structure is arranged on locating convex block or the screw on the backboard of the described end.
Described location structure is from the outstanding flange that forms of backboard of the described end.
Described adhesive layer adopts transmitance to make at the tackifier of 80%-100%.
The thickness of described adhesive layer is 30 μ m-80 μ m.
The thickness of described light guide plate is less than 4mm.
Light source in the described module backlight is arranged on the backboard of the described end, and is distributed in one side of described light guide plate four side or polygon.
Described light source is a light emitting diode, and its exiting surface is towards described light guide plate setting.
By above technical scheme as can be known, the present invention is fixed together light guide plate, optical film and liquid crystal panel by adhesive layer, bulk strength is improved, be difficult for guaranteeing flatness, the difficult technical matters that installs and fixes when using thin light guide plate thereby overcome, and, so realized production integrated of LCD because the assembling of module backlight and the assembling of liquid crystal panel and multiple peripheral parts can integratedly make.
Description of drawings
The side-looking structural representation of the LCD the when light source that Fig. 1 provides for the embodiment of the invention one adopts the side lighting-out tpye.
The side-looking structural representation of the LCD the when light source that Fig. 2 provides for the embodiment of the invention two adopts the side lighting-out tpye.
The side-looking structural representation of the LCD the when light source that Fig. 3 provides for the embodiment of the invention three adopts the side lighting-out tpye.
Fig. 4 is provided with the plan structure synoptic diagram of the LCD of location structure for what the embodiment of the invention four provided in indentation, there.
The location structure that Fig. 5 provides for the embodiment of the invention four adopts the plan structure synoptic diagram of the LCD of flange.
The location structure that Fig. 6 provides for the embodiment of the invention four adopts the plan structure synoptic diagram of the LCD of locating convex block.
The side-looking structural representation of the LCD the when light source that Fig. 7 provides for the embodiment of the invention five adopts the end face lighting-out tpye.
Among the figure:
1-liquid crystal panel 2-optical film 3-light guide plate
The 4-first reflector plate 5-second reflector plate 6-light source
7-circuit of light sources plate 8-the 3rd adhesive layer 9-second adhesive layer
10-the 4th adhesive layer 11-first adhesive layer 12-upper cover plate
Backboard 14-teat 15-bayonet socket at the bottom of the 13-
16-locating convex block 17-breach 18-flange
19-prismatic lens 20-diffusion sheet
Embodiment
Also in conjunction with the accompanying drawings the present invention is described in further detail below by specific embodiment.
Embodiment one
The side-looking structural representation of the LCD the when light source that Fig. 1 provides for the embodiment of the invention one adopts the side lighting-out tpye.The LCD of present embodiment comprises: liquid crystal panel 1, optical film 2, module backlight, end backboard 13 and upper cover plate 12.Wherein, module backlight comprises light guide plate 3, first reflector plate 4, light source 6 and circuit of light sources plate 7 at least; Optical film 2 can be the compound film sheet with diffusion and enhanced shine, perhaps comprises prismatic lens and the diaphragms such as diffusion sheet that are positioned at its downside at least; First reflector plate 4 is positioned at end backboard 13 upper surfaces, and light guide plate 3 is positioned at first reflector plate, 4 upper surfaces, and optical film 2 is positioned at light guide plate 3 upper surfaces, and liquid crystal panel 1 is positioned at optical film 2 upper surfaces; Light guide plate 3, optical film 2 and liquid crystal panel 1 are fixed together by adhesive layer; End backboard 13 is housings of being made by metal material, and upper cover plate 12 covers the inner components such as liquid crystal panel 1 on the end backboard 13.
Above-mentioned light guide plate 3, optical film 2 and liquid crystal panel 1 can be fixed together by one deck or the adhesive layer more than one deck.As shown in Figure 1, in the present embodiment, four edges of light guide plate 3 and four edges of liquid crystal panel 1 bond together by first adhesive layer 11, and optical film 2 is sandwiched between light guide plate 3 and the liquid crystal panel 1, and first adhesive layer 11 is around in the outside of optical film 2.In the present embodiment, four edges of light guide plate 3 and four edges of liquid crystal panel 1, bond together by first adhesive layer 11, and optical film 2 is clipped between light guide plate 3 and the liquid crystal panel 1, thereby light guide plate 3, optical film 2 and liquid crystal panel 1 are fixed together.Because light guide plate 3 is sandwiched between the end backboard 13 of the liquid crystal panel 1 of the glass material with counter-bending characteristic and metal material, therefore in the production of large scale liquid crystal display, even adopt the light guide plate 3 of minimal thickness, also can guarantee the flatness of light guide plate 3, be easy to install and fix, finally reach the slimming purpose of LCD.
On the basis of technique scheme, preferably be provided with stationary installation at upper cover plate 12 and end backboard 13, this stationary installation is fixed together upper cover plate 12 and end backboard 13, thus the inner components such as liquid crystal panel 1 between clamping upper cover plate 12 and the end backboard 13.Concrete fixed form can have multiplely between upper cover plate 12 and the end backboard 13, for example, screw is fixed, buckle in conjunction with etc.In the present embodiment, preferably buckle combination of stationary installation, promptly the teat 14 of end backboard 13 is stuck in the mode in the bayonet socket 15 of upper cover plate 12.By the buckle combination, only need upper cover plate 12 is fastened on the end backboard 13, just can simply upper cover plate 12 and end backboard 13 be combined.
Above-mentioned light source 6 can adopt light emitting diode, and its exiting surface is provided with towards light guide plate 3.Light emitting diode is divided into end face lighting-out tpye and side lighting-out tpye, is the side lighting-out tpye in the present embodiment.If light emitting diode is the end face lighting-out tpye, then can be installed on the sidewall of end backboard 13 by circuit of light sources plate 7, keep exiting surface to get final product towards light guide plate 3.
Embodiment two
The side-looking structural representation of the LCD the when light source that Fig. 2 provides for the embodiment of the invention two adopts the side lighting-out tpye.The difference of present embodiment and embodiment one is: optical film 2 is one deck compound film sheet; Between light guide plate 3 and the compound film sheet, bond together by second adhesive layer 9; Between compound film sheet and the liquid crystal panel 1, bond together by the 3rd adhesive layer 8.
The concrete bonding way of above-mentioned adhesive layer can have multiple, for example, and from the coating position angle of adhesive layer, preferably:
Second adhesive layer 9 is coated on the entire contact surface between light guide plate 3 and the compound film sheet equably; The 3rd adhesive layer 8 is coated on the entire contact surface between compound film sheet and the liquid crystal panel 1 equably.Above-mentioned bonding way can be guaranteed the bonding strength between each rete, improves the brightness uniformity of LCD.Adhesive layer coating method in the present embodiment is not limited to the even coating on the entire contact surface, as long as the bonding strength between each layer reaches certain requirement.For example, each adhesive layer also can be coated with in the part of entire contact surface.For example, at the frame place of surface of contact or on surface of contact, be coated with strip.
In the present embodiment, optical film 2 has adopted the only compound film sheet with diffusion and enhanced shine of one deck, therefore can pass through second adhesive layer 9 and the 3rd adhesive layer 8, and light guide plate 3, optical film 2 and liquid crystal panel 1 are fixed together.
Because light guide plate is fixed together with the liquid crystal panel with glass material of counter-bending characteristic, thereby improved the bending strength of light guide plate, when assembling module backlight, do not needed to be used for fixing the glue frame of module backlight, even adopt the light guide plate of minimal thickness, also can guarantee the flatness of light guide plate.
Embodiment three
The side-looking structural representation of the LCD the when light source that Fig. 3 provides for the embodiment of the invention three adopts the side lighting-out tpye.The difference of present embodiment and embodiment two is: between light guide plate 3 and the optical film 2, bond together by second adhesive layer 9; Between optical film 2 and the liquid crystal panel 1, bond together by the 3rd adhesive layer 8; Between each diaphragm in the optical film 2, bond together by the 4th adhesive layer 10.
Each diaphragm of above-mentioned optical film can have multiple array configuration, for example, is followed successively by the combination of diffusion sheet, prismatic lens and polaroid to the liquid crystal panel side by the light guide plate side.
In the present embodiment, optical film 2 comprises diffusion sheet 20 that is positioned at light guide plate 3 upper surfaces and the prismatic lens 19 that is positioned at these diffusion sheet 20 upper surfaces; Between light guide plate 3 and the diffusion sheet 20, bond together by second adhesive layer 9; Between prismatic lens 19 and the liquid crystal panel 1, bond together by the 3rd adhesive layer 8; Between prismatic lens 19 and the diffusion sheet 20, bond together by the 4th adhesive layer 10.
The concrete bonding way of above-mentioned adhesive layer can have multiple, for example, and from the coating position angle of adhesive layer, preferably:
Second adhesive layer 9 is coated on the entire contact surface between light guide plate 3 and the optical film 2 equably; The 3rd adhesive layer 8 is coated on the entire contact surface between optical film 2 and the liquid crystal panel 1 equably; The 4th adhesive layer 10 is coated in the optical film 2 on the entire contact surface between each diaphragm equably.
Above-mentioned bonding way can be guaranteed the bonding strength between each rete, improves the brightness uniformity of LCD.Adhesive layer coating method in the present embodiment is not limited to the even coating on the entire contact surface, as long as the bonding strength between each layer reaches certain requirement.For example, each adhesive layer also can be coated with in the part of entire contact surface.For example, at the frame place of surface of contact or on surface of contact, be coated with strip.
In the present embodiment, by second adhesive layer 9, the 3rd adhesive layer 8 and the 4th adhesive layer 10, light guide plate 3, optical film 2 and liquid crystal panel 1 are fixed together, thereby improved the bending strength of light guide plate 3, light guide plate 3 for minimal thickness, avoid occurring the phenomenon of the easy warpage in center, be easy to install and fix, and do not need to be used for fixing the glue frame of module backlight.
Embodiment four
Fig. 4, Fig. 5 and Figure 6 shows that the plan structure synoptic diagram of the LCD that the embodiment of the invention four provides.Present embodiment can be based on embodiment one or embodiment two or embodiment three, and location structure is set also further, be fixed on the end backboard 13, be positioned at the light guide plate 3, optical film 2 and the liquid crystal panel 1 that are fixed together around, the light guide plate 3, optical film 2 and the liquid crystal panel 1 that are used for being fixed together position fixing.
Above-mentioned location structure can be arranged on locating convex block on the end backboard 13, screw or from the end backboard 13 outstanding flange that form, and the distributing position of location structure can be multiple.As shown in Figure 4, four angles of above-mentioned light guide plate 3, optical film 2, liquid crystal panel 1 and first reflector plate 4 are cut out square breach 17 respectively after, fix with screw or locating convex block at these breach 17 places.As shown in Figure 5, this location structure is the flange 18 that forms by punching press when processing end backboard 13, is positioned at the place, two angles on the diagonal line.As shown in Figure 6, this location structure has adopted locating convex block 16, and is distributed in the centre position of each side of liquid crystal panel 1, be formed with in the position with respect to locating convex block 16 of upper cover plate 12 can ccontaining locating convex block 16 breach 17 or pilot hole.
By above-mentioned location structure, can support first reflector plate 4, light guide plate 3, optical film 2 and liquid crystal panel 1 securely, prevent that string on all directions moves in display plane because of external impact causes for it, thereby prevent and the collision of parts on every side, be easy to simultaneously install and fix.
Embodiment five
The side-looking structural representation of the LCD the when light source that Fig. 7 provides for the embodiment of the invention five adopts the end face lighting-out tpye.The difference of present embodiment and embodiment three is that light source 6 is end face lighting-out tpye light emitting diodes, therefore is set at the sidewall that is bent upwards of end backboard 13 by circuit of light sources plate 7, makes its exiting surface towards light guide plate 3.
Adopt the advantage of end face lighting-out tpye light emitting diode to be, because its light extraction efficiency height, brightness therefore backlight improves, thus the brightness that improves LCD.
In the LCD that various embodiments of the present invention provided, preferably above-mentioned adhesive layer adopts transmitance to make at the tackifier of 80%-100%, also can adopt transmitance to form at the double sticky tape of 80-100%.Above-mentioned each adhesive layer is preferably 30 μ m-80 μ m as the thickness of first adhesive layer, second adhesive layer and/or the 3rd adhesive layer.Simultaneously, preferably adopt the light guide plate of thickness in the present invention less than 4mm.
In sum, the present invention has the following advantages:
1, can realize the slimming of LCD.
2, can save the glue frame, save material cost, reduce transit link, cut operating costs.
In addition, present existing backlight module and liquid crystal panel are split-type design mostly, promptly must assemble module backlight in factory backlight earlier, then module backlight are transferred to panel factory, assembling liquid crystal display, this increase operation cost of delivering.And the assembling of LCD of the present invention, only need stick with glue the layer fix each parts after, get final product with upper cover plate and end backboard clamping, frame, glue frame, back cover were combined into module earlier before this process was different from and utilizes in the prior art, the constituted mode of set assembling has been realized the integrated making of module backlight and liquid crystal panel again.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (16)
1. a LCD comprises liquid crystal panel, module backlight, optical film, upper cover plate and end backboard, it is characterized in that: the light guide plate in the described module backlight, described optical film and described liquid crystal panel are fixed together by adhesive layer.
2. LCD according to claim 1, it is characterized in that: four edges of four edges of described light guide plate and described liquid crystal panel, bond together by first adhesive layer, and described optical film is sandwiched between described light guide plate and the described liquid crystal panel, and described first adhesive layer is around in the outside of described optical film.
3. LCD according to claim 1 is characterized in that: described optical film is one deck compound film sheet; Between described light guide plate and the described compound film sheet, bond together by second adhesive layer; Between described compound film sheet and the described liquid crystal panel, bond together by the 3rd adhesive layer.
4. LCD according to claim 3 is characterized in that:
Described second adhesive layer is coated on the entire contact surface between described light guide plate and the described compound film sheet equably; And/or
Described the 3rd adhesive layer is coated on the entire contact surface between described compound film sheet and the described liquid crystal panel equably.
5. LCD according to claim 1 is characterized in that: bond together by second adhesive layer between described light guide plate and the described optical film; Bond together by the 3rd adhesive layer between described optical film and the described liquid crystal panel; Bond together by the 4th adhesive layer between each diaphragm in the described optical film.
6. LCD according to claim 5 is characterized in that:
Described second adhesive layer is coated on the entire contact surface between described light guide plate and the described optical film equably;
Described the 3rd adhesive layer is coated on the entire contact surface between described optical film and the described liquid crystal panel equably; And/or
Described the 4th adhesive layer is coated in the described optical film on the entire contact surface between each diaphragm equably.
7. LCD according to claim 1 is characterized in that: described upper cover plate and end backboard are provided with stationary installation, and described upper cover plate and end backboard are fixed together.
8. LCD according to claim 7 is characterized in that: described stationary installation is teat on the end backboard and the bayonet socket on the upper cover plate.
9. LCD according to claim 1, it is characterized in that, also comprise: location structure, be fixed on the backboard of the described end, be positioned at the described light guide plate, optical film and the liquid crystal panel that are fixed together around, the described light guide plate, optical film and the liquid crystal panel that are used for being fixed together position fixing.
10. LCD according to claim 9 is characterized in that: described location structure is arranged on locating convex block or the screw on the backboard of the described end.
11. LCD according to claim 9 is characterized in that: described location structure is from the outstanding flange that forms of backboard of the described end.
12. according to the arbitrary described LCD of claim 1 to 11, it is characterized in that: described adhesive layer adopts transmitance to make at the tackifier of 80%-100%.
13. according to the arbitrary described LCD of claim 1 to 11, it is characterized in that: the thickness of described adhesive layer is 30 μ m-80 μ m.
14. according to the arbitrary described LCD of claim 1 to 11, it is characterized in that: the thickness of described light guide plate is less than 4mm.
15. LCD according to claim 1 is characterized in that: the light source in the described module backlight is arranged on the backboard of the described end, and is distributed in one side of described light guide plate four side or polygon.
16. LCD according to claim 15 is characterized in that: described light source is a light emitting diode, and its exiting surface is towards described light guide plate setting.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910236450XA CN102043276B (en) | 2009-10-22 | 2009-10-22 | Liquid crystal display (LCD) |
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| CN200910236450XA CN102043276B (en) | 2009-10-22 | 2009-10-22 | Liquid crystal display (LCD) |
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| CN102043276B CN102043276B (en) | 2012-07-25 |
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