CN201348699Y

CN201348699Y - Liquid crystal display device

Info

Publication number: CN201348699Y
Application number: CNU2008201817804U
Authority: CN
Inventors: 杨荣山; 张家瑶
Original assignee: WEIGUAN ELECTRONICS CO Ltd
Current assignee: WEIGUAN ELECTRONICS CO Ltd
Priority date: 2008-11-07
Filing date: 2008-12-18
Publication date: 2009-11-18
Anticipated expiration: 2018-12-18

Abstract

The utility model relates to a provides a liquid crystal display device, which comprises a liquid crystal screen glass combination, a plurality of optical sheets, a back shell and a mainboard module, wherein the liquid crystal screen glass combination comprises liquid crystal screen glass and a drive circuit board, and is characterized in that the liquid crystal screen glass combination used for realizing the display function, and the optical sheets are lapped and arrayed sequentially, are fixedly clamped by a matched clamping member and then are fixed or movably buckled on the back shell. The utility model adopts the back shell to replace the backboard and the middle frame of the traditional liquid crystal screen, and also adopts the clamping member to replace the front frame, thus being free from the heavy backboard and the middle frame; all parts are lapped in a scatter way and clamped in a whole, so the material is greatly saved, the processing link is reduced and the production cost is reduced; and at the same time, the thickness and the weight of the liquid crystal display are reduced, thereby, the light and thin requirement on the liquid crystal display is met. The utility model further solves the problems of the optical structure position, shockproof performance, skid prevention, radiation protection and the like after the structure is simplified.

Description

A kind of liquid crystal indicator

Technical field

The utility model relates to the electronic product field, particularly a kind of liquid crystal indicator.

Background technology

In recent years, liquid crystal indicator is used more and more extensivelyr, as display devices such as LCD, LCD TV, PC all-in-ones, no matter be to be applied to any product, no matter be to be applied to which field also, pursuing the volume lightweight, save the processing cost and the energy, all is the target that present modern product is pursued.At present, existing liquid crystal indicator mainly is by the face frame, liquid crystal display, mainboard module, metal support and back cover are formed, wherein, described liquid crystal display is mainly by preceding frame, the liquid-crystalline glasses module, center, optical sheet, light source, lampshade and backboard are formed, above-mentioned member is assembled after normally processing and being assembled into corresponding composite module again, thereby need the other parts such as center and backboard that increase to fix, make that the thickness of liquid crystal indicator is thicker usually, cost is higher, technology is more complicated also, and backboard is generally a metalwork, more makes liquid crystal indicator relatively heavier.Therefore, be necessary to break through the traditional design theory, look for a kind of new design, this design can be simplified the structure of LCD, reduces cost, and satisfies the lightening day by day development trend of present LCD.

The utility model content

The purpose of this utility model is to provide a kind of liquid crystal indicator, and being intended to solve needs to adopt a plurality of additional member to fix and cause that processing cost is higher, the defective of overall weight weight in the available liquid crystal display device.

The utility model is to realize like this, a kind of liquid crystal indicator, comprise glasses for LCD group product, some optical sheets, back cover and mainboard assembly, described glasses for LCD group product comprise glasses for LCD and drive circuit board, the utility model will be used to realize the arrangement that coincides in regular turn of the glasses for LCD group product of Presentation Function, some optical sheets, by fixed or movable being snapped on the back cover behind the adaptive with it clamping member clamping.

Preferably, the optical sheet adjacent with described glasses for LCD is first optical sheet, the exiting surface that a described optical sheet and described glasses for LCD adjacent surface are first optical sheet, the back side of exiting surface is incidence surface, is folded with cushion between the described glasses for LCD and first optical sheet.

Described cushion or be at least one bar shaped member fits on the exiting surface of first optical sheet, or is a framed structure, fits in around the first optical sheet exiting surface.

Also be provided with distance piece between described first optical sheet and other optical sheet.

Described distance piece or be at least one bar shaped member fits on the described first optical sheet incidence surface, or is a framing component, fits in around the first optical sheet incidence surface.

Each optical sheet of described superimposed arrangement in regular turn is last diffusion sheet, brightening piece, following diffusion sheet, light guide plate and reflector, and wherein said upward diffusion sheet is first optical sheet.

Described back cover and last optical sheet adjacency, and and the optical sheet of this adjacency between be provided with flexible cushion block.

Described clamping member is the combination of at least two strip members that can be connected with back cover, or is framing component.

Described clamping member is made of four " L " type bonding jumpers.

Described mainboard assembly comprises preceding cage, back cage and mainboard, cage, back cage fasten mutually and form an integral body before described, described mainboard places preceding cage, back cage to fasten in the cavity of back formation, described mainboard assembly places between optical sheet and the back cover, and is provided with a flexible piece between described preceding cage and the optical sheet.

The utility model also comprises a lampshade, and described lampshade has first limit and second limit, and wherein, the length on first limit of lampshade is longer than the length on second limit, and second limit of described lampshade covers the drive circuit board of glasses for LCD group product at least.

Also be provided with the spacer that is used to locate glasses for LCD group product on first limit of described lampshade.

Described liquid crystal indicator is LCD, LCD TV or computing machine.

Be different from prior art, the utility model is by the superimposed in regular turn arrangement of each basic part that will form display device, again by fixed or movable being snapped on the back cover behind the adaptive with it clamping member clamping, utilize its back cover to replace the backboard and the center of traditional liquid crystal display, make it no longer have heavy backboard and center, and frame before utilizing the clamping member to replace, each part disperses superimposed, whole clamping can be saved product material greatly, reduces processing link, thereby production cost and processing cost have been saved, simultaneously, also can reduce LCD thickness and weight, preferably reach the lightening requirement of LCD.Further, the utility model has also overcome problems such as the optical texture location that causes behind the simplified structure, shockproof, anti-skidding, radiation proof.

Description of drawings

Fig. 1 is the utility model one-piece construction exploded view;

Fig. 2 is the glasses for LCD group product behind the utility model clamping, some optical sheets and back cover structural representation;

Fig. 3 is the utility model lampshade sectional structure chart;

Fig. 4 is the utility model glasses for LCD group product, some optical sheets and lampshade fit structure synoptic diagram;

Fig. 5 is the utility model glasses for LCD group product, some optical sheets and lampshade fit structure exploded view;

Fig. 6 is the utility model mainboard assembly STRUCTURE DECOMPOSITION figure;

Fig. 7 cooperates sectional drawing one between each part of the utility model;

Fig. 8 cooperates sectional drawing two between each part of the utility model;

Fig. 9 is the A place enlarged drawing of the utility model Fig. 8;

Figure 10 is the B place enlarged drawing of the utility model Fig. 8.

Embodiment

In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.

As shown in Figure 1, the utility model comprises a back cover 30 and mainboard assembly 218, also comprise be used to realize Presentation Function it, glasses for LCD group product, some optical sheets, described glasses for LCD group product comprise glasses for LCD 203 and drive circuit board 2121, above-mentioned part is by after the superimposed in regular turn arrangement of designing requirement, by adaptive with it clamping member 26 clampings, corresponding then fixed or movable being snapped on the back cover 30, simultaneously, mainboard assembly 218 is placed back cover 30 corresponding arrangements place that are provided with, just realized the fixing and installation of entire product.The utility model is by corresponding superimposed with the part of each dispersion, unify clamping again, be different from and be combined into module in the prior art earlier, the constituted mode of set assembling both can reduce manufacturing procedure again, also can reduce the additional member of being derived by the prior art structure simultaneously, as center, backboard etc., so reduced processing cost, material cost and assembly cost, can reduce the weight of product again, further can reach the whole lightening purpose of liquid crystal indicator.

Shown in Fig. 1, Fig. 4, Fig. 5,7-10, the utility model is particularly among the embodiment, describedly be used to realize that each part of Presentation Function comprises: some optical sheets of glasses for LCD 203 (open cell), drive circuit board 2121 and superimposed arrangement, the optical sheet that described glasses for LCD 203 is adjacent with it is first optical sheet, a described optical sheet is adjacent with described glasses for LCD 203, is folded with cushion 204 (Rubber Pad) between the two.Particularly, the optical sheet that the utility model Fig. 5 shows comprises diffusion sheet 25, brightening piece 206, light guide plate 209 and reflector 215, described diffusion sheet 25 be mainly used in divergent beams, can provide uniform surface light source to LCDs; The main effect of brightening piece 206 is to revise direction of light, increases the utilization benefit of light, two superimposed compositions of diaphragm of general normal employing, and direction is vertical each other, and light is concentrated to improve whole briliancy; The effect of light guide plate 209 is guiding radiation directions, improves liquid crystal display radiance degree and control brightness even; The effect of reflector 215 is that the light that will not enter light guide plate 209 reflects, and it is transferred on the liquid crystal display by light guide plate 209 again, prevents that light source from leaking outside, to increase the service efficiency of light source.The described diffusion sheet 25 of the utility model embodiment can set up diffusion sheet 205 and following diffusion sheet 207 separately, described first optical sheet is last diffusion sheet 205, described upward diffusion sheet 205 and following diffusion sheet 207 lay respectively at two sides of brightening piece 206, wherein first optical sheet--the two sides of-last diffusion sheet 205 is respectively exiting surface 2051 and incidence surface 2052, described exiting surface 2051 and glasses for LCD 203 adjacency, described last optical sheet can be reflector 215, also can be other optical sheets.

Described cushion 204 is arranged between diffusion sheet 205 and the glasses for LCD 203, and the annular or the frame-shaped structure that can be formed in one and form fit in around the exiting surface 2051 of diffusion sheet 205; Also can be at least one shape member, as two strip members that be arranged in parallel, fit in exiting surface 2051 both sides of diffusion sheet 205.Described cushion 204 has certain elasticity, can be made by elastomeric material or other rubber-like material, can make between glasses for LCD 203 and the last diffusion sheet 205 to keep certain intervals.Simultaneously, cushion 204 can produce certain elastic deformation being subjected to external force to do the time spent, the influence that can avoid external vibration that entire product is brought, and can make under pressure between glasses for LCD 203 and the last diffusion sheet 205 and combine closely, can prevent the external dust invasion, pollute glass, influence imaging effect.In addition, because the friction factor of elastic pad material is bigger usually, under pressure, the friction force between cushion 204 and the glasses for LCD 203 is also bigger, slide so can also effectively prevent glasses for LCD 203, during anti-sliding stop to the scuffing of glasses for LCD 203.

In the utility model specific embodiment, described cushion 204 also can be arranged at (not shown) between glasses for LCD 203 and the light guide plate 209 according to designing requirement.This is because last diffusion sheet 205 is all very thin usually, and intensity is little, and therefore, cushion 204 damages when disposed thereon easily, and light guide plate 209 is thicker usually, is not easy damage when disposed thereon, so has better technique effect.

In the utility model specific embodiment, between diffusion sheet 205 and the brightening piece 206, also be provided with distance piece 208 on described.Described distance piece 208 can be at least one bar shaped member, shows as Fig. 5 to be depicted as two members that be arranged in parallel, fits in described diffusion sheet 205 incidence surfaces 2052 both sides of going up, and also can be a framing component, fits in around diffusion sheet 205 incidence surfaces 2052.Described brightening piece 206 is superimposed with the one side of light guide plate 209 by back, distance piece 208 location with following diffusion sheet 207, the another side of light guide plate 209 and reflector 215 are superimposed, described reflector 215 and light guide plate 209 superimposed faces are a shiny surface, are used for reflection ray to light guide plate 209.

Described distance piece 208 can be made by materials such as rubber, has certain elasticity, can be used for locating brightening piece 206 and following diffusion sheet 207, simultaneously can keep having a slight gap between diffusion sheet 205 and the brightening piece 206, prevent because last diffusion sheet 205 and the brightening piece 206 superimposed polarisation phenomenons that cause.

Foregoing description is a preferable embodiment, also can do some distortion at the said structure setting, such as, can omit diffusion sheet 205 and brightening piece 206.

Shown in Fig. 4, Fig. 5, Fig. 7-10, in the utility model specific embodiment, described light guide plate 209 and reflector 215 are fixed by lampshade 23 clampings that light source 214 is housed.Described light source 214 is strip, can be any luminescence component, such as being cold-cathode fluorescence lamp or the strip LED lamp that formed by some LED.Described light source 214 two ends are fixed on the lampshade 23 by fixture 210 respectively.As shown in Figure 3, described lampshade 23 can set up upper lamp shade and lower lamp shade separately, upper and lower being symmetrical arranged, and structure is asymmetric " U " type, it has first limit 231 and second limit 232, presss from both sides into a spill cavity 233 between the two.Wherein, the length on first limit 231 of described lampshade is less than the length on second limit 232, and second limit 232 of described lampshade covers drive circuit board 2121 at least, thereby plays anti-electromagnetic interference (EMI) effect.Simultaneously, the thickness of lampshade 23 should can be suitably thicker with respect to the lampshade that tradition is used, thus the intensity of increase lampshade 23.In addition, because the length on lampshade second limit 232 increases, therefore, the also corresponding increase of area of dissipation, radiating effect has clear improvement, simultaneously, reflector 215 and lampshade 23 contacts area are increased, the Area of bearing of reflector 215, light guide plate 209 etc. increases, and like this, it is former thereby cause distortion that reflector 215 and light guide plate 209 are difficult for Yin Wendu and stress etc., therefore, can use thin reflector 215 and light guide plate 209, thereby can further alleviate integral product weight, reduce the size of product thickness direction.

Position between described two light sources 214 are arranged among the spill cavity 233 of upper and lower lampshade 23 respectively; After described reflector 215, light guide plate 209 are fitted mutually and between two light sources 214, the incidence surface setting of light source 214 relative light guide plate 209.Described reflector 215, light guide plate 209 upper and lower sides place first limit 231 and 232 inboards, second limit of upper and lower lampshade 23 respectively, and fit tightly with it, form an integral body.

On the lateral surface on first limit 231 of described lampshade 23, also be provided with the spacer 234 of two evaginations, described spacer 234 is used to locate glasses for LCD 203.Second limit 232 of lampshade is provided with the lug plate of some threaded holes and an evagination, described threaded hole can be used for fixed drive circuit board 2121, lead one end is connected on the described lug plate, and the other end is connected on the metal shell of mainboard assembly 218, thereby with lampshade 23 ground connection.

As shown in Figure 2, the utility model embodiment designs on described back cover 30 concave shaped cavity of evagination a little, which is provided with two register pins 302, described mainboard assembly 218 places between optical sheet and the back cover 30, is placed in the above-mentioned concave shaped cavity by register pin 302 location.Described mainboard assembly 218 comprises preceding cage 2181, back cage 2183 and system board 2182, cage 2181, back cage 2183 are made by metal material before described, can isolate electromagnetic wave and radiation that mainboard 2182 produces, its symmetry contains a cavity, fastening forms a box-like integral body mutually, and described system board 2182 places preceding cage 2181, back cage 2183 to fasten in the box cavity of back formation.

Between described back cover 30 and reflector 215, also be folded with the two flexible cushion block I 216 that be arranged in parallel, described flexible cushion block I 216 is for strip member and can be fixed in the corresponding positioning strip that is provided with 301 sides on the back cover 30, fits with reflector 215 both sides.Flexible cushion block I 216 can select foam for use, can utilize the elasticity of foam, absorbs each part's machining errors and rigging error, support the flatness of each optical sheet, but also can absorb exterior vibration, and prevent the impact of external force to glasses for LCD group product and each optical sheet, make it to have shockproof function.

Because the utility model has omitted the backboard of conventional display device, for with mainboard assembly 218 with last optical sheet--reflector 215 is separated, avoid being subjected to external force or each other bump when mobile, the utility model embodiment is between mainboard assembly 218 and last optical sheet reflector 215, also be provided with a flexible cushion block II 217, described flexible cushion block II 217 can be that rubber etc. has certain flexible material to make.Described flexible cushion block II 217 fits or is adhered on the preceding cage 2181.This structure setting can make the protecting against shock of glasses for LCD group product and optical sheet and vibration proof ability better.

As Fig. 1, shown in Figure 9, some optical sheets for good fixedly glasses for LCD 203 (open cell) and superimposed arrangement, the utility model embodiment also is provided with a clamping member 26, and described clamping member 26 can be the combination of two or four strip members, or is a framing component.Framing component is made of four " L " type bonding jumpers described in the utility model diagram---two lateral frames 202 and side stand 201.On the side of described two lateral frames 202 and two side stands 201, also be provided with clamping part 2011, can fasten, be coated on the part periphery of above-mentioned superimposed back with the points of engagement of back cover 30 corresponding settings, and by the characteristic of bonding jumper itself, the effect that also can realize having anti-electromagnetic interference (EMI).

Further, as shown in Figure 2, frame 10 before the utility model embodiment also can be provided with, it is the cubic type framework of a center hollow, be coated on glasses for LCD group product after the combination, each optical sheet, the lampshade, and snap fit makes whole outside of deivce unified, attractive in appearance on back cover 30.

The utility model assembling process is as follows: at first mainboard assembly 218 is fixed in the depressed part of back cover 30, and at the left and right sides of back cover 30 sticking flexible cushion block I 216, the outside surface sticking flexible cushion block II 217 of cage 2181 before mainboard; Around the exiting surface 2051 of last diffusion sheet 205, attach cushion 204 then, at the left and right sides of last diffusion sheet incidence surface 2052 attaching distance piece 208; At last light source 214 and light guide plate 209 and reflector 215 are fixed in lampshade 23, make itself and lampshade 23 in aggregates.

Relend the connecting portion setting that helps aid to make glasses for LCD 203 and be connected glasses for LCD 203 and drive circuit board 2121, and drive circuit board 2121 is attached on the back cover 30.Utilize lead that light source 214 and mainboard assembly 218 are electrically connected then, the integral body that light source 214, light guide plate 209, reflector 215 and lampshade 23 are assembled into is flat on the back cover 30, and make second limit 232 of lampshade 23 cover drive circuit board 2121, thereby play the effect of anti-electromagnetic interference (EMI).Again at diffusion sheet 207, brightening piece 206 and last diffusion sheet 205 under the shop successively on the light guide plate 215, and the exiting surface 2051 that makes diffusion sheet 205 up, again glasses for LCD 203 is put down from aid at last, glasses for LCD 203 is tiled on the diffusion sheet 205 by the spacer on the lampshade 23 234.Around glasses for LCD 203, place the clamping member 26 that constitutes by four bonding jumpers again, and utilize the corresponding construction on clamping member 26 and the back cover 30 that glasses for LCD 203, each optical sheet are fixed on the back cover 30, again face frame 10 is sticked on the back cover 30 at last.

The utility model can be LCD, LCD TV or computing machine.

The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.

Claims

1, a kind of liquid crystal indicator, comprise glasses for LCD group product, some optical sheets, back cover and mainboard assembly, described glasses for LCD group product comprise glasses for LCD and drive circuit board, it is characterized in that, it is with being used to realize the glasses for LCD group product of Presentation Function, the superimposed in regular turn arrangement of some optical sheets, by fixed or movable being snapped on the back cover behind the adaptive with it clamping member clamping.

2, liquid crystal indicator as claimed in claim 1, it is characterized in that, the optical sheet adjacent with described glasses for LCD is first optical sheet, the exiting surface that a described optical sheet and described glasses for LCD adjacent surface are first optical sheet, the back side of exiting surface is incidence surface, is folded with cushion between the described glasses for LCD and first optical sheet.

3, liquid crystal indicator as claimed in claim 2 is characterized in that, described cushion or be at least one bar shaped member fits on the exiting surface of first optical sheet, or is a framed structure, fits in around the first optical sheet exiting surface.

4, liquid crystal indicator as claimed in claim 2 is characterized in that, also is provided with distance piece between described first optical sheet and other optical sheet.

5, liquid crystal indicator as claimed in claim 4 is characterized in that, described distance piece or be at least one bar shaped member fits on the described first optical sheet incidence surface, or is a framing component, fits in around the first optical sheet incidence surface.

As the arbitrary described liquid crystal indicator of claim 1 to 5, it is characterized in that 6, each optical sheet of described superimposed arrangement in regular turn is last diffusion sheet, brightening piece, following diffusion sheet, light guide plate and reflector, wherein said upward diffusion sheet is first optical sheet.

7, liquid crystal indicator as claimed in claim 1 is characterized in that: described back cover and last optical sheet adjacency, and and the optical sheet of this adjacency between be provided with flexible cushion block.

8, liquid crystal indicator as claimed in claim 1 is characterized in that: described clamping member is the combination of at least two strip members that can be connected with back cover, or is framing component.

9, liquid crystal indicator as claimed in claim 8 is characterized in that: described clamping member is made of four " L " type bonding jumpers.

10, liquid crystal indicator as claimed in claim 1, it is characterized in that: also comprise a lampshade, described lampshade has first limit and second limit, wherein, the length on first limit of lampshade is longer than the length on second limit, and second limit of described lampshade covers the drive circuit board of glasses for LCD group product at least.

11, liquid crystal indicator as claimed in claim 10 is characterized in that: also be provided with the spacer that is used to locate glasses for LCD group product on first limit of lampshade.

12, liquid crystal indicator as claimed in claim 1, it is characterized in that: described mainboard assembly comprises preceding cage, back cage and mainboard, cage, back cage fasten mutually and form an integral body before described, described mainboard places preceding cage, back cage to fasten in the cavity of back formation, described mainboard assembly places between optical sheet and the back cover, and is provided with a flexible piece between described preceding cage and the optical sheet.

13, liquid crystal indicator as claimed in claim 1 is characterized in that: described liquid crystal indicator is LCD, LCD TV or computing machine.