CN204101849U - A kind of backlight of curved surface liquid crystal indicator and curved surface liquid crystal indicator - Google Patents

Abstract

The utility model relates to display device, refers more particularly to a kind of backlight and curved surface liquid crystal indicator of curved surface liquid crystal indicator.This backlight comprises: the backboard matched with the curved surface LCDs of curved surface liquid crystal indicator; Support member, has multiple cascaded surface parallel with the base plate of backboard; Be arranged on the light source component on each cascaded surface; Multiple light source component forms a curved surface outstanding to a direction, and the projected direction of curved surface is identical with the projected direction of curved surface LCDs.In technique scheme, adopt this ledge structure, reach when not bending backlight physical construction and optics, realize the curved optic distribution of light source component, reduce the difficulty of processing of backlight.Meanwhile, it is identical that light source component is horizontally set on the setting direction of light source component on cascaded surface, ensure that its light direction is identical, makes backlight can provide more uniform light, improve the display effect of display device.

Description

A kind of backlight of curved surface liquid crystal indicator and curved surface liquid crystal indicator

Technical field

The utility model relates to display device, refers more particularly to a kind of backlight and curved surface liquid crystal indicator of curved surface liquid crystal indicator.

Background technology

Along with the development of display technique, and the raising day by day that Consumer's Experience requires, the lcd products of curved surface is also arisen at the historic moment.The display panel of liquid crystal has certain elasticity, can realize the LCDs of curved surface; Because liquid crystal itself can not be luminous, therefore the LCDs of curved surface needs a Light distribation to be the backlight of curved surface.But the physical construction of backlight and optics bending machining technique difficulty, and bending optics affects the propagation of light, the brightness homogeneity that difficult realization is higher.

The backlight of prior art mean camber liquid crystal display has straight-down negative and side-light type two kinds.These two kinds of backlights all need the backboard physical construction bent, and bending optics, exists the problems such as processing technology difficulty is large.

Utility model content

The utility model provides a kind of backlight and curved surface liquid crystal indicator of curved surface liquid crystal indicator, in order to improve the homogeneity of the backlight bright dipping in curved surface liquid crystal indicator, and reduces the difficulty of processing of backlight.

The utility model provides a kind of backlight of curved surface liquid crystal indicator, and this backlight comprises:

The backboard matched with the curved surface LCDs of curved surface liquid crystal indicator;

Support member, is positioned at described backboard, and described support member has the parallel cascaded surface of the base plate of multiple and described backboard;

Be arranged on the light source component on each cascaded surface, the light source component on described multiple cascaded surface is different with the distance between the base plate of described backboard;

Described multiple light source component forms a curved surface outstanding to a direction, and the projected direction of described curved surface is identical with the projected direction of described curved surface LCDs.

In technique scheme, adopt this ledge structure, reach when not bending backlight physical construction and optics, realize the curved optic distribution of light source component, thus reduce the difficulty of processing of backlight.In addition, when adopting this kind of structure, light source component is horizontally set on cascaded surface, the setting direction of light source component is identical, ensure that its light direction is identical, avoids and adopts arc when arranging, the setting direction difference of light source component makes the light formed excessively gather, cause the situation that light is uneven, thus make backlight can provide more uniform light, improve the display effect of display device.

Preferably, when described curved surface LCDs is male type LCDs, the direction that the distance between described multiple cascaded surface and the base plate of described backboard extends along the center line of described curved surface LCDs to its both sides reduces gradually; When described curved surface LCDs is inner concave shape LCDs, the direction that the distance between described multiple cascaded surface and the base plate of described backboard extends along the center line of described curved surface LCDs to its both sides increases gradually.Changed by the differing heights of step surface, achieve light source component and form curved surface.

Preferably, the curvature of described curved surface is identical with the curvature of described curved surface LCDs.Further improve the homogeneity of bright dipping.

Preferably, when described curved surface LCDs is inner concave shape LCDs, meet formula from back plate edges towards the distance between the n-th cascaded surface of the centerline direction of described curved surface LCDs counting and the base plate of described backboard:

wherein, R be described curved surface LCDs radius-of-curvature, L is the length of backboard on the direction of the center line of vertical curved surface LCDs; P is the horizontal range between two adjacent light source component; Y is the position of curved surface LCDs corresponding to light source component that the n-th cascaded surface is arranged and the spacing of curved surface LCDs lowest point.Define the setting of cascaded surface.

Preferably, described support member comprises the bulge-structure corresponding with each cascaded surface.Cascaded surface is supported by bulge-structure.

Selectable, described multiple bulge-structure interval is arranged.

Selectable, described multiple bulge-structure is structure as a whole.

Preferably, described multiple light source component be arranged in parallel.

Preferably, described light source component is multiple LED along the single arrangement of cascaded surface length direction.The light of enough brightness can be provided.

The utility model additionally provides a kind of curved surface liquid crystal indicator, and this curved surface liquid crystal indicator comprises the backlight described in above-mentioned any one.

In technique scheme, adopt this ledge structure, reach when not bending backlight physical construction and optics, realize the curved optic distribution of light source component, thus reduce the difficulty of processing of backlight.In addition, when adopting this kind of structure, it is identical that light source component is horizontally set on the setting direction of light source component on cascaded surface, ensure that its light direction is identical, avoid and adopt arc when arranging, the setting direction difference of light source component makes the light formed excessively gather, and causes the situation that light is uneven, thus make backlight can provide more uniform light, improve the display effect of display device.

Accompanying drawing explanation

The sectional view of the backlight of the curved surface liquid crystal indicator that Fig. 1 provides for the utility model embodiment;

The schematic diagram of the cascaded surface setting of the backlight of the curved surface liquid crystal indicator that Fig. 2 provides for the utility model embodiment;

The sectional view of the backlight of the another kind of curved surface liquid crystal indicator that Fig. 3 provides for the utility model embodiment.

Reference numeral:

10-backboard 11-support member 111-cascaded surface

112-bulge-structure 12-light source component 20-curved surface LCDs

Embodiment

In order to improve the homogeneity of the backlight bright dipping in curved surface liquid crystal indicator, and reduce the difficulty of processing of backlight.The utility model embodiment provides a kind of backlight and curved surface liquid crystal indicator of curved surface liquid crystal indicator, in the technical solution of the utility model, different according to the distance of light source distance backlight curved surface LCDs, backboard arranges the ledge structure with differing heights, and make light source be arranged on the step of differing heights structure, reach when not bending backlight physical construction and optics, realize the curved optic distribution of light source, LCDs for curved surface provides bending light source, reduce bending backlight difficulty of processing in Curved LCD, improve brightness uniformity.For making the purpose of this utility model, technical scheme and advantage clearly, for nonrestrictive embodiment, the utility model is described in further detail below.

As shown in Figures 1 and 3, Fig. 1 shows the sectional view of the backlight that the utility model embodiment provides, and Fig. 3 provides the sectional view of the backlight of the another kind of curved surface liquid crystal indicator that the utility model embodiment provides.

The utility model embodiment provides a kind of backlight of curved surface liquid crystal indicator, and this backlight comprises:

The backboard matched with the curved surface LCDs of curved surface liquid crystal indicator;

Support member, is positioned at backboard, and support member has multiple cascaded surface parallel with the base plate of backboard;

Be arranged on the light source component on each cascaded surface, the light source component on multiple cascaded surface is different with the distance between the base plate of backboard;

Multiple light source component forms a curved surface outstanding to a direction, and the projected direction of curved surface is identical with the projected direction of curved surface LCDs.

In the above-described embodiments, by adopting cascaded surface supporting light sources part, and the height of the light source component distance base plate after fixing is different, multiple light source component is made to form a curved surface outstanding to a direction, and the projected direction of this curved surface is identical with the projected direction of curved surface LCDs, thus ensure that the light mixing distance between light source component and curved surface LCDs.Cannot not achieve bendingly the effect that backlight and light source component can realize sending uniform light.

Concrete, when curved surface LCDs is male type LCDs, the direction that the distance between multiple cascaded surface and the base plate of backboard extends along the center line of curved surface LCDs to its both sides reduces gradually; When curved surface LCDs is inner concave shape LCDs, the direction that the distance between multiple cascaded surface and the base plate of backboard extends along the center line of curved surface LCDs to its both sides increases gradually.

In the above-described embodiments, support member 11 is provided with in backboard 10, this support member 11 has multiple cascaded surface 111, and the direction that the distance between the base plate of described cascaded surface 111 and described backboard 10 extends along the center line of described curved surface LCDs to its both sides increases gradually or reduces gradually; Thus the distance formed between cascaded surface 111 and base plate changes with the bending change of the curved surface LCDs of arc, ensure that the distance between cascaded surface 111 and curved surface LCDs 20, and then ensure that the distance be arranged between light source component 12 on cascaded surface 111 and curved surface LCDs 20.Adopt this ledge structure, reach when not bending backlight physical construction and optics, realize the curved optic distribution of light source component 12, thus reduce the difficulty of processing of backlight.In addition, when adopting this kind of structure, light source component 12 is horizontally set on (with the placement direction of the backlight shown in Fig. 1 for horizontal direction) on cascaded surface 111, the setting direction of light source component 12 is identical, ensure that its light direction is identical, avoid and adopt arc when arranging, the setting direction difference (flexural center towards arc) of light source component 12, the light formed excessively is gathered, cause the situation that light is uneven, thus make backlight can provide more uniform light, improve the display effect of display device.

Conveniently to the understanding of the backlight that the present embodiment provides, within backlight corresponding to concave Iy curved LCDs be example, and composition graphs 1 and Fig. 2 are described in detail the backlight that the utility model embodiment provides.

In order to further improve the uniformity coefficient of backlight bright dipping, preferably, the curvature of the curved surface of light source component 12 composition is identical with the curvature of curved surface LCDs 20.Thus ensure that light source component 12 is identical with the distance of curved surface LCDs 20, the brightness that light source component 12 is irradiated in curved surface LCDs 20 is identical, and then improves the uniformity coefficient of the light that backlight irradiates.

When specifically arranging, cascaded surface 111 apart from backboard 10 base plate between distance have certain restriction, this is defined as: meet formula from backboard 10 edge towards the distance between the n-th cascaded surface 111 of the centerline direction of described curved surface LCDs 20 counting and the base plate of described backboard 10:

wherein, L is the length of backboard 10 on the direction of the center line of vertical curved surface LCDs 20; P between adjacent two light source component 12 horizontal range (this horizontal range for the backlight placement direction shown in Fig. 1 for reference direction time, the distance between two light source component 12); Y is the position of curved surface LCDs 20 and the spacing of curved surface LCDs 20 lowest point of light source component 12 correspondence that the n-th cascaded surface 111 is arranged.

Concrete, the setting of light source component 12 on cascaded surface 111 as shown in Figure 1, if the length of backboard 10 on the direction (i.e. step arrange direction) of the center line of vertical curved surface LCDs 20 is L.If the horizontal range between adjacent two light source component 12 is p, then edge light part 12 is p/2 apart from the distance of backboard 10 side in the design.

As shown in Figure 2, in the backlight of curved-surface display device, cascaded surface 111 high computational of corresponding each light source component 12 is as follows: O is the minimum point of curved surface LCDs 20, B is the marginal point of curved surface LCDs 20, A is the position of light source component 12 correspondence in curved surface LCDs 20 at most edge, and x is bench height (namely cascaded surface 111 is apart from the distance of the base plate of backboard 10); When curved surface LCDs 20 adjust to B point become curved-surface display time, if curved surface LCDs 20 edge adjust size is d (i.e. the vertical range of B point and O point), for edge light part 12, its backboard 10 and curved surface LCDs 20 are apart from increasing y (i.e. the vertical range of A point and O point).Light source component 12 light mixing distance at backlight center is that (light source component 12 is herein as a pointolite for h, namely the volume size of light source component is not considered, therefore, this h is: on the direction of vertical back-panel bottom surface, cascaded surface is to the distance of the position of the curved surface LCDs of its correspondence), its backboard 10 is identical with light mixing distance with the distance H0 of curved surface LCDs 20, namely

H0＝h，

If curved surface LCDs 20 radius-of-curvature be R, then the length of corresponding OB is: R α, and wherein α is the angle of the line of the center of surface of O point and B point to curved surface LCDs 20, calculates according to figure intermediate cam shape:

$\frac{\mathrm{\α}}{2}={\tan }^{-1}\frac{2d}{L},$

And d ²+ (L/2) ²=(R α) ²;

So the radius-of-curvature under this state can be obtained:

$R=\frac{\sqrt{d^2+{(L/2)}^2}}{2{\tan }^{-1}\frac{2d}{L}}$

In figure, the length of OA is: R β, and

$\mathrm{\β}=2{\tan }^{-1}\frac{2y}{L-p}$

Calculate according to Pythagorean theorem: $y=\sqrt{{\left(\mathrm{R\β}\right)}^2-\left((L-p\right)}=\sqrt{{\left(R2{\tan }^{-1}\frac{2y}{L-p}\right)}^2-\left((L-p\right)}$

Therefore the position of first row light source component 12 place base plate and the spacing of curved surface LCDs 20 become:

$H1=H0+y=h+\sqrt{{\left(R2{\tan }^{-1}\frac{2y}{L-p}\right)}^2-\left((L-p\right)}$

And the position of first row light source component 12 place base plate and curved surface LCDs 20 are apart from equaling light mixing distance and bench height sum, be

$H1=h+x=h+\sqrt{{\left(R2{\tan }^{-1}\frac{2y}{L-p}\right)}^2-\left((L-p\right)}$

Namely the height of first row step is

$x=\sqrt{{\left(R2{\tan }^{-1}\frac{2y}{L-p}\right)}^2-\left((L-p\right)}$

Can be counted by above-mentioned account form, the distance between the cascaded surface 111 of each light source component 12 arrangement and base plate is:

$\sqrt{{\left(R2{\tan }^{-1}\frac{2y}{L-(n+1)p}\right)}^2-\left((L-(n+1)p\right)};$

The TV within the scope of 46-110inch is applicable to, as 46inch, 55inch, 65inch, 85inch, 98inch and 1100inch etc. with the utility model.For 65inchTV, light source component 12 wherein be arranged in parallel.And each light source component 12 is multiple LED along the single arrangement of cascaded surface 111 length direction, thus guarantee the light that enough brightness is provided.Concrete embodiment is as follows:

1.65inch backlight is of a size of L1428*W804mm, arranges along long limit in the direction of step arrangement, and namely step arrangement is 1428mm along length.Horizontal direction distance in setting backlight between LED is p=25mm, then the distance of edge LED distance backlight side is 11.5mm in the design, then in this backlight, LED distribution array is 57 * 32.Setting backlight light mixing distance h=90mm, the light mixing distance of each row LED is h in the backlight, then central series LED is H0=90mm apart from the distance of curved surface LCDs 20.Setting bench height is x.

2. as curved surface LCDs 20 edge adjustment d=40mm, corresponding curved surface LCDs 20 radius-of-curvature is R=6000mm, so calculate according to Pythagorean theorem, edge columns LED backplane 10 increases y=20.5mm with the distance of curved surface LCDs 20, then edge columns LED backplane 10 is H0+y=110.5mm with the distance of curved surface LCDs 20.And edge columns LED backplane 10 equals light mixing distance h and bench height x sum, i.e. edge columns bench height x=20.5mm with the distance of curved surface LCDs 20.

3. according to calculating, the bench height that each row LED is corresponding, for

$\sqrt{{(6000*2{\tan }^{-1}\frac{2*20.5}{1428-(n+1)*25})}^2-{((1428-(n+1)*25)/2)}^2}$

Wherein n is the n-th row LED, in the present embodiment n=1 from backlight edge counting, 2,28, from central series, central series both sides LED is symmetrical about central series, and namely from backlight edge counting, the 30th row bench height is equal with the 28th row bench height.

Support member 11 wherein comprises the bulge-structure 112 corresponding with each cascaded surface 111, namely described support member 11 is multiple bulge-structures 112, the upper surface of bulge-structure 112 is cascaded surface 111, light source component 12 is supported by bulge-structure 112, and when specifically arranging, selectable multiple bulge-structure 112 interval is arranged, or adopts multiple bulge-structure 112 to be structure as a whole.The producer can select different structures according to the condition of production of reality.

Should be understood that, the backlight that the utility model embodiment provides is not limited only to the backlight of the curved surface liquid crystal indicator for inner concave shape enumerated in above-mentioned Fig. 1 and Fig. 2, also the backlight of the curved surface liquid crystal indicator for male type as shown in Figure 3 can be adopted, both principles are similar, its difference is only, because the bending direction of the bending direction of the curved surface LCDs 20 of the curved surface liquid crystal indicator of male type and the curved surface LCDs 20 of inner concave shape is inconsistent, thus cause the placement that arranges of the cascaded surface 111 be arranged in backboard 10 to change.When described curved surface LCDs 20 is male type LCDs, the direction that the distance between described multiple cascaded surface 111 and the base plate of described backboard 10 extends along the center line of described curved surface LCDs 20 to its both sides reduces gradually.Thus ensure that light source component 12 to arrange Changing Pattern identical with the Changing Pattern of curved surface, ensure that the homogeneity of bright dipping.

The utility model embodiment still provides a kind of curved surface liquid crystal indicator, and this curved surface liquid crystal indicator comprises the backlight described in above-mentioned any one.

In the above-described embodiments, support member 11 is provided with in backboard 10, this support member 11 has multiple cascaded surface 111, and the direction that the distance between the base plate of described cascaded surface 111 and described backboard 10 extends along the center line of described curved surface LCDs to its both sides increases gradually or reduces gradually; Thus the distance formed between cascaded surface 111 and base plate changes with the bending change of arc-shaped curved surface LCDs, ensure that the distance between cascaded surface 111 and curved surface LCDs 20, and then ensure that the distance be arranged between light source component 12 on cascaded surface 111 and curved surface LCDs 20.Adopt this ledge structure, reach when not bending backlight physical construction and optics, realize the curved optic distribution of light source component 12, thus reduce the difficulty of processing of backlight.In addition, when adopting this kind of structure, light source component 12 is horizontally set on (with the placement direction of the backlight shown in Fig. 1 for horizontal direction) on cascaded surface 111, the setting direction of light source component 12 is identical, ensure that its light direction is identical, avoid and adopt arc when arranging, the setting direction difference (flexural center towards arc) of light source component 12, the light formed excessively is gathered, cause the situation that light is uneven, thus make backlight can provide more uniform light, improve the display effect of display device.

Obviously, those skilled in the art can carry out various change and modification to the utility model and not depart from spirit and scope of the present utility model.Like this, if these amendments of the present utility model and modification belong within the scope of the utility model claim and equivalent technologies thereof, then the utility model is also intended to comprise these change and modification.

Claims (10)

1. a backlight for curved surface liquid crystal indicator, is characterized in that, comprising:

The backboard matched with the curved surface LCDs of curved surface liquid crystal indicator;

Support member, is positioned at described backboard, and described support member has the parallel cascaded surface of the base plate of multiple and described backboard;

Be arranged on the light source component on each cascaded surface, the light source component on described multiple cascaded surface is different with the distance between the base plate of described backboard;

Described multiple light source component forms a curved surface outstanding to a direction, and the projected direction of described curved surface is identical with the projected direction of described curved surface LCDs.

2. the backlight of curved surface liquid crystal indicator as claimed in claim 1, is characterized in that,

When described curved surface LCDs is male type LCDs, the direction that the distance between described multiple cascaded surface and the base plate of described backboard extends along the center line of described curved surface LCDs to its both sides reduces gradually; When described curved surface LCDs is inner concave shape LCDs, the direction that the distance between described multiple cascaded surface and the base plate of described backboard extends along the center line of described curved surface LCDs to its both sides increases gradually.

3. the backlight of curved surface liquid crystal indicator as claimed in claim 1, it is characterized in that, the curvature of described curved surface is identical with the curvature of described curved surface LCDs.

4. the backlight of curved surface liquid crystal indicator as claimed in claim 2, it is characterized in that, when described curved surface LCDs is inner concave shape LCDs, meet formula from back plate edges towards the distance between the n-th cascaded surface of the centerline direction of described curved surface LCDs counting and the base plate of described backboard:

$\sqrt{{\left({R2\tan }^{-1}\frac{2y}{L-(n+1)p}\right)}^2-{((L-(n+1)p)/2)}^2};$ Wherein, R be described curved surface LCDs radius-of-curvature, L is the length of backboard on the direction of the center line of vertical curved surface LCDs; P is the horizontal range between two adjacent light source component; Y is the position of described curved surface LCDs corresponding to light source component that the n-th cascaded surface is arranged and the spacing of curved surface LCDs lowest point.

5. the backlight of curved surface liquid crystal indicator as claimed in claim 1, it is characterized in that, described support member comprises multiple bulge-structure, and the upper surface of described bulge-structure is described cascaded surface.

6. the backlight of curved surface liquid crystal indicator as claimed in claim 5, is characterized in that, described multiple bulge-structure interval is arranged.

7. the backlight of curved surface liquid crystal indicator as claimed in claim 5, it is characterized in that, described multiple bulge-structure is structure as a whole.

8. the backlight of the curved surface liquid crystal indicator as described in any one of claim 1 ~ 7, is characterized in that, described multiple light source component be arranged in parallel.

9. the backlight of curved surface liquid crystal indicator as claimed in claim 8, it is characterized in that, described light source component is multiple LED along the single arrangement of cascaded surface length direction.

10. a curved surface liquid crystal indicator, is characterized in that, comprises the backlight as described in any one of claim 1 ~ 9.