CN201302611Y

CN201302611Y - A light collecting element

Info

Publication number: CN201302611Y
Application number: CNU2008201331035U
Authority: CN
Inventors: 叶土生; 叶鸿钦
Original assignee: ITEQ ELECTRONIC CO Ltd
Current assignee: Suzhou Sidike New Material Science and Technology Co Ltd
Priority date: 2008-08-29
Filing date: 2008-08-29
Publication date: 2009-09-02
Anticipated expiration: 2018-08-29

Abstract

The utility model relates to a light collecting element which comprises substrate and a plurality of prisms. The prisms are continuously arranged on the substrate; a prism concave part is formed between adjacent prisms; the lower ends of all prism concave parts are positioned in the same plane to form a reference plane. The first prism group is provided with a relative higher peak which is a first height more than the reference surface. The second prism group is provided with a relative lower peak which is a second height more than the reference surface; wherein, each first prism and each second prism are alternately and continuously arranged on the substrate; meanwhile, the second height is 93%-85% of the first height.

Description

Light collecting element

Technical field

The utility model relates to a kind of light collecting element, the backlight module that refers to be used for the liquid crystal visual organ especially can gain brightness, improve the light collecting element structure of the optically focused diaphragm of brightness uniformity.

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 crucial zero element of display panels.Because liquid crystal itself can't be luminous, therefore need to use backlight module to supply light source, can show normal and the well-balanced image of brightness so as to making liquid crystal panel.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.

For further being the effect of the optically focused blast of gain backlight, two-layer above light harvesting membrane layer can be stacked togather.

Yet, at present with the two-layer above stacking shortcoming that may cause of light harvesting diaphragm: one, the interference of light.The prism arrangement structure of known rule easily with the striped of light source and liquid crystal panel generation optical interference, influences picture display effect.Two, static dirt.Two layers the light harvesting diaphragm structure that changes easily produces static dirt (easily adsorbing the foreign substance pollution structure) because of the mill difference between surface of contact.In view of this, the design of light harvesting diaphragm still has the demand of improvement.

The utility model content

Therefore technical problem to be solved in the utility model is to provide a kind of light collecting element.

To achieve these goals, the utility model proposes a kind of light collecting element, it comprises base material and a plurality of prism.A plurality of prisms are arranged on the base material continuously, form a prism paddy between adjacent prisms, and the bottom of all prism paddy is positioned at same plane to form a reference field.First prisms has a relative peak and is higher than reference field one first height.Second prisms has a relative ebb and is higher than reference field one second height, and wherein each first prism and each second prism alternately are arranged on the base material continuously, and second highly is 93%～85% of first height.

To achieve these goals, the utility model also proposes a kind of light collecting element, and it comprises the first light harvesting film and the second light harvesting film.Two opposite faces of each light harvesting film are a prism facets and a plane.The prism facets of the first light harvesting film contacts the plane of the second light harvesting film.Each prism facets comprises a plurality of prisms arranges continuously, and forms a prism paddy between adjacent prisms.The bottom of all prism paddy is positioned at same plane to form a reference field.First prisms has a relative peak and is higher than reference field one first height.Second prisms has a relative ebb and is higher than reference field one second height, and wherein each first prism and each second prism are alternately arranged continuously, and second highly is 93%～85% of first height.

From the above, after application multilayer light collecting element of the present utility model is stacking, can reduce the striped of optical interference, promote picture display effect, reduce simultaneously because of the static dirt that friction produced between the light collecting element surface of contact.

Description of drawings

For described and other purpose of the present utility model, feature, advantage and embodiment can be become apparent, being described in detail as follows of appended accompanying drawing:

Fig. 1 is the stereographic map according to a kind of light collecting element of the utility model one preferred embodiment;

Fig. 2, the 3rd, the sectional view of the light collecting element of Fig. 1 is to present relative dimensions;

Fig. 4 is the stereographic map according to a kind of light collecting element of another preferred embodiment of the utility model; And

Fig. 5 is the stereographic map according to a kind of light collecting element of this novel another preferred embodiment.

[main element symbol description]

100: light collecting element 106c: crest line

102: base material 106d: crest line

104: prism 108: reference field

104a: relative peak 110: prism paddy

104b: crest line h1: highly

104c: crest line h2: highly

104d: crest line A1: drift angle

106: prism A2: drift angle

106a: relative ebb P1: spacing

106b: crest line P2: spacing

Embodiment

Please refer to Fig. 1, it is the stereographic map according to a kind of light collecting element of this novel preferred embodiment.Fig. 2, the 3rd, the light collecting element of Fig. 1 is along the sectional view of A-A '.Light collecting element 100 comprises a base material 102 and polygon prism 104,106.These prisms are divided into first prisms 104 and second prisms 106.First prisms 104 all has relative peak 104a, and second prisms 106 all has relative ebb 106a.Each first prism 104 is arranged on base material 102 alternately with each second prism 106.In other words, each first prism 104 is between two adjacent second prisms 106, or each second prism 106 is between two adjacent first prisms 104.Peak 104a is than reference field 108 high h1 relatively, and ebb 106a is than reference field 108 high h2 relatively.In embodiment of the present utility model, the virtual plane that reference field 108 is positioned at for V-arrangement prism paddy 110 bottoms between all prisms.

In order to solve the stacking shortcoming of known multilayer light collection diaphragm (for example the striped of optical interference, friction between surface of contact easily produce the static dirt), the preferable ratio of h2/h1 is 93%～85%.Result of experiment demonstrates, the difference in height between h2, the h1 less than 7% when following antistatic dirty effect not remarkable, be higher than anti-interference of light effect promoting more than 20%, but brightening effect can reduce.Stacking together the time when multilayer such as light collecting element 100, the prism facets of a light collecting element (one side with prism) is the bottom surface (for example bottom surface 102a of Fig. 1) of another light collecting element of contact.Because prism facets has only the bottom surface that first prisms 104 (relative peak 104a) can another light collecting element of contact, and second prisms 106 can not contact the bottom surface of another light collecting element.Because the contact area between the light collecting element has tailed off (part of second prisms 106), the effect of antistatic dirt just can promote.

In a wherein embodiment of the present utility model, the difference in height scope between h2, the h1 is 2 microns～10 microns.In another embodiment of the present utility model, the difference in height scope between h2, the h1 is 3 microns～5 microns.

Please refer to Fig. 3, in a wherein embodiment of the present utility model, the spacing P1 of the adjacent prisms paddy of first prisms 104 is substantially equal to the spacing P2 of the adjacent prisms paddy of second prisms 106.In another embodiment of the present utility model, the scope of spacing P1 or P2 is 45 microns～55 microns.In another embodiment of the present utility model, the scope of spacing P1 or P2 is 35 microns～45 microns.

In a wherein embodiment of the present utility model, the drift angle A2 of second prism is greater than the drift angle A1 of first prism.In another embodiment of the present utility model, the drift angle A1 scope of first prism is 85 degree～100 degree.In another embodiment of the present utility model, the drift angle A1 of first prism is 90 degree.

Please refer to Fig. 1, the crest line 104b of all first prisms is straight line and parallel each other with the crest line 106b of all second prisms.

Please refer to Fig. 4, it is the stereographic map according to a kind of light collecting element of this novel another preferred embodiment.The embodiment that present embodiment is different from Fig. 1 is the curve (from vertical view) that wriggles about its

crest line

104c, 106c are.The crest line 104c of all first prisms 104 all is positioned at the plane of a parallel base material 102.The crest line 106c of all first prisms 106 all is positioned at the plane of another parallel base material 102.And the crest line 104c of all first prisms 104 is all parallel each other with the crest line 106c of all second prisms 106.The plane that crest line 104c is positioned at (highly being the h1 of Fig. 2) is higher than the plane (highly being the h2 of Fig. 2) that crest line 106c is positioned at.The arbitrary sectional view of this light collecting element (B-B ' for example; C-C ') size relationship of the proportionate relationship of h2/h1, the size relationship of P2/P1, A2/A1 is all identical with Fig. 2,3 described embodiment.

Please refer to Fig. 5, it is the stereographic map according to a kind of light collecting element of this novel another preferred embodiment.The embodiment that present embodiment is different from Fig. 4 is its crest line 104d, the 106d curve (from side view) for wriggling up and down.The crest line 106d of the crest line 104d of all first prisms 104 and first prisms 106 is the curve (from side view) that wriggles up and down with respect to base material 102.And the crest line 104d of all first prisms 104 is all parallel each other with the crest line 106d of all second prisms 106.Even so, the arbitrary sectional view of this light collecting element (E-E ' for example; F-F ') size relationship of the proportionate relationship of h2/h1, the size relationship of P2/P1, A2/A1 is all identical with Fig. 2,3 described embodiment.

By above-mentioned the utility model preferred embodiment as can be known, after application multilayer optical element of the present utility model is stacking, can reduce the striped of optical interference, promote picture display effect, reduce simultaneously because of the static dirt that friction produced between the light collecting element surface of contact.

Though the utility model discloses as above with preferred embodiment; right its is not in order to limit the utility model; any correlative technology field has knows the knowledgeable usually; in not breaking away from spirit and scope of the present utility model; when can being used for a variety of modifications and variations, therefore protection domain of the present utility model is as the criterion when looking the scope that accompanying Claim defines.

Claims

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

One base material; And

A plurality of prisms are arranged on this base material continuously, form a prism paddy between adjacent prisms, and the bottom of all prism paddy is positioned at same plane to form a reference field, and described a plurality of prisms comprise:

First prisms has a relative peak and is higher than this reference field one first height; And

Second prisms has a relative ebb and is higher than this reference field one second height, and wherein each this first prism and each this second prism alternately are arranged on this base material continuously, and this second highly be this first highly 93%～85%.

2, light collecting element according to claim 1 is characterized in that, the spacing of adjacent this prism paddy is all identical, and the crest line of all prisms is all parallel to each other.

3, light collecting element according to claim 1 is characterized in that, the drift angle scope of this first prisms is 85 degree～100 degree.

4, light collecting element according to claim 3 is characterized in that, the drift angle of this second prisms is greater than the drift angle of this first prisms, and the drift angle of this first prisms is 90 degree.

5, light collecting element according to claim 1 is characterized in that, the difference in height scope between this second height and this first height is 2 microns～10 microns.

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

First light collecting element and second light collecting element, two opposite faces of each light collecting element are a prism facets and a plane, and wherein this prism facets of this first light collecting element contacts this plane of this second light collecting element, and this prism facets comprises:

A plurality of prisms are arranged continuously, form a prism paddy between adjacent prisms, and the bottom of all prism paddy is positioned at same plane to form a reference field, and described a plurality of prisms comprise:

Second prisms has a relative ebb and is higher than this reference field one second height, and wherein each this first prism and each this second prism are alternately arranged continuously, and this second highly be this first highly 93%～85%.

7, light collecting element according to claim 6 is characterized in that, the spacing of adjacent this prism paddy is all identical, and the crest line of all prisms is all parallel to each other.

8, light collecting element according to claim 6 is characterized in that, the drift angle scope of this first prisms is 85 degree～100 degree.

9, light collecting element according to claim 8 is characterized in that, the drift angle of this second prisms is greater than the drift angle of this first prisms, and the drift angle of this first prisms is 90 degree.

10, light collecting element according to claim 6 is characterized in that, the difference in height scope between this second height and this first height is 2 microns～10 microns.