CN201107420Y

CN201107420Y - Light collecting element

Info

Publication number: CN201107420Y
Application number: CNU2007201815912U
Authority: CN
Inventors: 叶鸿钦; 叶宗毅; 叶土生
Original assignee: ITEQ ELECTRONIC CO Ltd
Current assignee: Suzhou Sidike New Material Science and Technology Co Ltd
Priority date: 2007-10-17
Filing date: 2007-10-17
Publication date: 2008-08-27
Anticipated expiration: 2017-10-17

Abstract

A light collecting element includes a substrate, a plurality of first prisms and a plurality of second prisms. The first prisms are lined on the substrate in parallel. The second prisms are also lined on the substrate in parallel and staggered with the first prisms, wherein, the first prisms are higher than the second prisms, and the profile shape of the first prisms and the second prisms is triangle. The light collecting element is provided with the first and the second prisms which are staggered, so as to concentrate the light in two different directions to the center, thus improving the light collecting function.

Description

Light collecting element

Technical field

The utility model relates to a kind of optical element, and particularly relevant for a kind of optical element with a plurality of projections.

Background technology

The photoelectricity correlation technique is constantly weeded out the old and bring forth the new in recent years, adds the arrival of digital times, and then has promoted the flourish of LCD market.LCD (liquid Crystal Displayer; LCD) have that high image quality, volume are little, in light weight, advantage such as low voltage drive, low consumpting power and applied range, therefore be widely used in consumer electronics or computer products such as Portable TV, mobile phone, mobile computer and desktop display, and replace cathode-ray tube (CRT) (Cathode Ray Tube gradually; CRT) become the main flow of display.

Backlight module is one of vital part of display panels.In view of liquid crystal itself can't be luminous, therefore need to use backlight module to supply light source, use making liquid crystal panel can show normal and the well-balanced image of brightness.Usually have light collecting element in the backlight module, for example diffusion sheet (diffusion sheet) and brightness enhancement film (brightness enhancement film) to increase the briliancy of emergent ray, make the distribution of emergent ray can be more even.

Summary of the invention

Technical problem to be solved in the utility model provides a kind of light collecting element, concentrates toward central authorities in order to the light that backlight module is emitted.

According to the utility model one embodiment, a kind of light collecting element comprises base material, a plurality of first water chestnut mirror and a plurality of second water chestnut mirror.The first water chestnut mirror is parallel on the base material.The second water chestnut mirror also is parallel on the base material, and interlaced with the first water chestnut mirror.Wherein, the height of the first water chestnut mirror is than the height height of the second water chestnut mirror, and the section shape of the first water chestnut mirror and the second water chestnut mirror is triangle.

According to another embodiment of the utility model, a kind of light collecting element comprises base material, a plurality of first water chestnut mirror and a plurality of second water chestnut mirror.The first water chestnut mirror is parallel on the base material.The second water chestnut mirror then is folded in respectively between any two first water chestnut mirrors.Wherein, the section shape of the first water chestnut mirror and the second water chestnut mirror is triangle.

Combine the above,, therefore the light of two different directions can be concentrated toward central authorities, to increase the function of light harvesting because the utility model the foregoing description has the first water chestnut mirror and the second water chestnut mirror that is crisscross arranged.

Below in conjunction with the drawings and specific embodiments the utility model is described in detail, but not as to qualification of the present utility model.

Description of drawings

Fig. 1 is the vertical view according to the light collecting element of the utility model one embodiment;

Fig. 2 is the sectional view along the line segment A of Fig. 1;

Fig. 3 is the sectional view along the line segment B of Fig. 1;

Fig. 4 is according to the first water chestnut mirror of another embodiment of the utility model or the sectional view of the second water chestnut mirror;

Fig. 5 is according to the utility model vertical view of the first water chestnut mirror of an embodiment again;

Fig. 6 is the side view according to the first water chestnut mirror of the another embodiment of the utility model;

Fig. 7 is the drawing in side sectional elevation according to the light collecting element of another embodiment of the utility model;

Fig. 8 is according to the utility model longitudinal diagram of the light collecting element of an embodiment again.

Wherein, Reference numeral

110: base material

120: the first water chestnut mirrors

130: the second water chestnut mirrors

A: line segment

B: line segment

C: center line

DF: direction

DS: direction

G: gravity direction

PF: spacing

HF: highly

α: drift angle

HS: highly

PS: spacing

β: drift angle

AC: amplitude

AW: amplitude

VD: vertical range

D1～d6: distance

Embodiment

By above-mentioned background technology as can be known, in order to allow liquid crystal panel can show normal and the well-balanced image of brightness, has light collecting element in the backlight module usually, for example: brightness enhancement film and diffusion barrier, to increase the briliancy of emergent ray, make the distribution of emergent ray can be more even.Yet general brightness enhancement film can only allow the light of upper and lower both sides concentrate toward central authorities mostly, but often powerless to the light of and arranged on left and right sides.

Moreover existing brightness enhancement film is to concentrate light by periodic straight line projection mostly, but the projection of this shape is easy and the liquid crystal picture element of LCD produces repeatedly line effect (Moir é Effect), and then causes visual defective.Therefore, the following embodiment of the utility model will propose a kind of light collecting element, to solve the above problems.

Fig. 1 is the vertical view according to the light collecting element of the utility model one embodiment.As shown in the figure, a kind of light collecting element comprises base material 110, a plurality of first water chestnut mirror 120 and a plurality of second water chestnut mirrors 130.The first water chestnut mirror 120 is parallel on the base material 110.The second water chestnut mirror 130 also is parallel on the base material 110, and interlaced with the first water chestnut mirror 120.

Because the utility model the foregoing description has the first water chestnut mirror 120 and the second water chestnut mirror 130 that is crisscross arranged, therefore the light of two different directions can be concentrated toward central authorities, to increase the function of light harvesting.In addition, the second above-mentioned water chestnut mirror 130 also can be considered the discontinuous projection that is folded in 120 in any two first water chestnut mirrors respectively, and it can upset the linear structure of the first water chestnut mirror, 120 rules originally, and then reduces the repeatedly generation of line effect.

Particularly, the length direction DF of the first water chestnut mirror 120, and the angle between the length direction DS of the second water chestnut mirror 130 can be between about 5 °-90 ° or 45 °-90 °.More particularly, the length direction DF of the first water chestnut mirror 120 of present embodiment can be vertical mutually with the length direction DS of the second water chestnut mirror 130.And the length direction DF of the first water chestnut mirror 120 is roughly parallel to gravity direction G, and the length direction DS of the second water chestnut mirror 130 then is approximately perpendicular to gravity direction G.Certainly, the user also can select to make the length direction DS of the second water chestnut mirror 130 to be roughly parallel to gravity direction G, is that the length direction DF of the first water chestnut mirror 120 is approximately perpendicular to gravity direction G on the contrary.Thus, no matter be the light of horizontal direction or vertical direction, all can concentrate toward central authorities by the refraction of the first water chestnut mirror 120 or the second water chestnut mirror 130.

Should be appreciated that " length direction " speech should be defined as: " in the three-dimensional dimension of object, numerical value soprano's direction.", this definition will be continued to use in subsequent descriptions and claim, no longer repeat to give unnecessary details it.

Fig. 2 is the sectional view along the line segment A of Fig. 1.As shown in the figure, the height H F of the first water chestnut mirror 120 can be than the height H S height of the second water chestnut mirror 130.More particularly, the height H S of these second water chestnut mirrors 130 can be height H F about below 95% of the first water chestnut mirror 120, perhaps between about 10%-60%.

Continuation is with reference to Fig. 2, and the section shape of the first water chestnut mirror 120 of present embodiment can be triangle.In addition, the spacing PF (pitch) of these first water chestnut mirrors 120 can be between about 15-120 μ m, and the height H F of the first water chestnut mirror 120 can be between about 7-60 μ m, then can be between about 70 °-110 ° as for the angle of the apex angle of the first water chestnut mirror 120.For instance, the spacing PF of the first water chestnut mirror 120 of present embodiment is 100 μ m, and the height H F of the first water chestnut mirror 120 is 50 μ m, then is 90 ° as for the angle of the apex angle of the first water chestnut mirror 120.Should be appreciated that, more than the dimensional parameters of the first water chestnut mirror lifted all only be illustration, be not that this skill person of the prior art should look actual needs elasticity and select it in order to restriction the utility model.

Fig. 3 is the sectional view along the line segment B of Fig. 1.As shown in the figure, the section shape of the second water chestnut mirror 130 of present embodiment also can be triangle.In addition, the spacing PS (pitch) of these second water chestnut mirrors 130 can be between about 10-60 μ m, and the height H S of the second water chestnut mirror 130 can be between about 3-35 μ m, then can be between about 70 °-110 ° as for the angle of the apex angle ss of the second water chestnut mirror 130.For instance, the spacing PS of the second water chestnut mirror 130 of present embodiment is 30 μ m, and the height H S of the second water chestnut mirror 130 is 15 μ m, then is 90 ° as for the angle of the apex angle ss of the second water chestnut mirror 130.Similarly, more than the dimensional parameters of the second water chestnut mirror lifted all only be illustration, be not that this skill person of the prior art should look actual needs elasticity and select it in order to restriction the utility model.

Though 1-3 figure all is expressed as minute surface with the surface of the first water chestnut mirror 120 and/or the second water chestnut mirror 130, this does not limit the utility model, and the surface of the first water chestnut mirror 120 and/or the second water chestnut mirror 130 also can be cloudy surface (being as Fig. 4).And both select its embodiment that is suitable for when looking design at that time with elasticity of demand ground these, do not need entirely for minute surface or be cloudy surface entirely, and can partly be that minute surface or part are cloudy surface.

In addition, the first water chestnut mirror 120 can have identical refractive index with the second water chestnut mirror 130.Perhaps, the first water chestnut mirror 120 also can have different refractive indexes with the second water chestnut mirror 130.For instance, the first water chestnut mirror 120 of present embodiment and the material of the second water chestnut mirror 130 are the acryl multipolymer.

Though 1-3 figure all is expressed as the straight line post with the first water chestnut mirror 120, this does not limit the utility model, and the shape of the first water chestnut mirror 120 also can be curvilinear columns (as shown in Figure 5) or wave post (as shown in Figure 6).Should be appreciated that " curvilinear columns " speech should be defined as: " cylinder, the curved shape of its length direction.", and " wave post " speech should be defined as: " cylinder, its top margin present the shape that height rises and falls.”。

In addition, when the first water chestnut mirror 120 be shaped as curvilinear columns (as shown in Figure 5) or wave post when (as shown in Figure 6), the curve amplitude A C (as shown in Figure 5) of these first water chestnut mirrors 120 or wave amplitude AW (as shown in Figure 6) can be between about 0.1-5 μ m.More particularly, no matter the shape of the first water chestnut mirror 120 is curvilinear columns (as shown in Figure 5) or wave post (as shown in Figure 6), the ultimate range between its length direction or top margin and center line C all can be between about 0.1-5 μ m.

Though Fig. 3 is expressed as direct connection base material 110 with the second water chestnut mirror 130, this does not limit the utility model, the second water chestnut mirror 130 also can with base material 110 preset distance at interval.With reference to Fig. 7, the second water chestnut mirror 130 of Fig. 7 promptly is arranged at base material 110 tops, and vertical range VD between the two can be between about 0-10 μ m or about 0-3 μ m.For instance, the vertical range VD of 110 of second water chestnut mirror 130 of present embodiment and base materials is 10 μ m.

Moreover, the second above-mentioned water chestnut mirror 130 except can being interconnected with one another, the setting that also can be separated from each other of these second water chestnut mirrors 130.For instance, the second water chestnut mirror 130 of Fig. 8 setting that promptly is separated from each other, and 130 in the second water chestnut mirror is not identical completely apart from d1～d6, but 130 in this skill person's Random assignment second water chestnut mirror of the prior art apart from d1～d6.For instance, present embodiment is respectively 5 μ m, 10 μ m, 3 μ m, 5 μ m, 10 μ m and 2 μ m apart from d1～d6.

Should be appreciated that, the disclosed light collecting element of the foregoing description is except can be applicable to LCD, and other light fixture (for example: light fixture, art lamp, electric torch and street lamp) also can be used the briliancy that above-mentioned light collecting element increases emergent ray with flat-panel screens.

Certainly; the utility model also can have other various embodiments; under the situation that does not deviate from the utility model spirit and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the utility model.

Claims

1, a kind of light collecting element is characterized in that, comprises:

One base material;

A plurality of first water chestnut mirrors are parallel on this base material;

A plurality of second water chestnut mirrors are parallel on this base material, and interlaced with this first water chestnut mirror, and wherein the height of this first water chestnut mirror is than the height height of this second water chestnut mirror, and the section shape of this first water chestnut mirror and this second water chestnut mirror is triangle.

2, light collecting element as claimed in claim 1 is characterized in that, the wherein length direction of this first water chestnut mirror, and the angle between the length direction of those second water chestnut mirrors is between about 5 °-90 °.

3, light collecting element as claimed in claim 1 is characterized in that, wherein the length direction of this first water chestnut mirror is to be roughly parallel to a gravity direction, and the length direction of this second water chestnut mirror then is approximately perpendicular to this gravity direction.

4, light collecting element as claimed in claim 1 is characterized in that, wherein the surface of this first water chestnut mirror is a minute surface.

5, light collecting element as claimed in claim 1 is characterized in that, wherein the surface of this second water chestnut mirror is a minute surface.

6, a kind of light collecting element is characterized in that, comprises:

One base material;

A plurality of first water chestnut mirrors are parallel on this base material;

A plurality of second water chestnut mirrors are folded in respectively between this first water chestnut mirror, and wherein the section shape of this first water chestnut mirror and this second water chestnut mirror is triangle.

7, light collecting element as claimed in claim 6 is characterized in that, wherein the length direction of this first water chestnut mirror is to be roughly parallel to a gravity direction.

8, light collecting element as claimed in claim 6 is characterized in that, wherein the height of this first water chestnut mirror is than the height height of this second water chestnut mirror.

9, light collecting element as claimed in claim 6 is characterized in that, wherein the surface of this first water chestnut mirror is a minute surface.

10, light collecting element as claimed in claim 6 is characterized in that, wherein the surface of this second water chestnut mirror is a minute surface.