CN101153922B

CN101153922B - Diffusing lens

Info

Publication number: CN101153922B
Application number: CN2006101523204A
Authority: CN
Inventors: 郭浩然
Original assignee: GUANGYAO TECHNOLOGY Corp
Current assignee: GUANGYAO TECHNOLOGY Corp
Priority date: 2006-09-26
Filing date: 2006-09-26
Publication date: 2010-09-29
Anticipated expiration: 2026-09-26
Also published as: CN101153922A

Abstract

The invention relates to a diffusion condenser, wherein, a long strip rough diffusion side is arranged between two closed prism pillars. The mixing of the ray diffused from the diffusion face between two prism pillars and the ray emitted from the prism pillar can effectively reduce light color diffusion phenomenon and strip in pulverization of prism pillars, reduce occurrence of overlapped trace and increase producing qualification rate of the condenser. The base material, a plurality of long strip prism pillars of longitudinal arrangement and rough diffusion side of long strip shape are forming in one piece so as to be made easily.

Description

Diffusing lens

Technical field

The present invention is relevant concentration piece, especially relevant back light system or other diffusing lens that needs in order to LCD (LCD, LiquidCrystal Display).

Background technology

See also shown in Figure 1.General backlight liquid crystal display system comprises cold cathode fluorescent lamp (CCFL) 11, light guide plate (LGP) 12, following diffusion sheet (Bottom diffuser) 13, concentration piece (Prismsheet) 14, goes up diffusion sheet (Top diffuser) 15 and 16 compositions of reflecting plate (Reflector).

See also shown in Figure 2.Leg-of-mutton prism columns (Prism rod) 141 and 142 of base materials (Substrate) that known concentration piece 14 is arranged by a plurality of parallel longitudinals are formed.Prism columns 141 is incorporated into a side of base material 142.Height, the width of each water chestnut mirror post 141 are identical, and the ridge height of prism columns 141 is constant, move towards to be straight line, and the inclined-plane of crest line both sides is symmetrical.

See also shown in Fig. 3,4.The optical path pattern of concentration piece 14 has three kinds:

1. (TRI Recycle) reclaimed in total reflection:

Light 143 by in the prism columns 141 about the virtual Z-axis 140 of vertical prism columns 141 bottom surfaces ± 4 ° of injections are fashionable, are subjected to the influence of the total reflection phenomenon of prism inclined-plane post 141, after twice total reflection, are recycled to light source direction behind, continue diffusion and propagate and utilize;

2. birefringence reclaims (2 ^NdReflection Recycle):

After the refraction of light 144 via two groups of prism columns 141, be recycled to light source direction behind again, continue diffusion and propagate utilization; And

3. directly refraction (Directed Reflective):

Light 145 reflects via the inclined-plane of prism columns 141, and this light path pattern has the effect of concentrated light; As shown in Figure 3, the light that reflects in the 80 ° of scopes in visual angle by prism columns 141 just has the value of utilization.

The colourity X value of known concentration piece 14 and colourity Y value correspond respectively to the changing value at visual angle, respectively shown in dashed curve and block curve among Fig. 4, by dashed curve and the bigger numerical value of the upper and lower amplitude of variation of block curve, the optical dispersion phenomenon that shows known concentration piece 14 is more obvious, and the repeatedly phenomenon of line takes place easily.

Multiple concentration piece with light diffusion layer is arranged, for example United States Patent (USP) the 5th, 844, the concentration piece (Prism sheet) that discloses for No. 720, one mask have plural number vertically near the Tp post that is arranged in parallel, and its another side has uneven surface, produce interference fringe in the time that refracted ray can being avoided, and prevent scratch, and make the brightness homogeneous that reflects concentration piece, help the use of liquid crystal display; The concentration piece that the TaiWan, China patent discloses for M293442 number comprises a base material, and a side of this base material comprises a light diffusion layer with recessed or protruding coarse structure, and wherein this light diffusion layer has 5%～90% diffusibleness; The concentration piece that discloses for M277950 number comprises a matrix, and the lower surface of this matrix is an incidence surface, and in order to receiving beam, the upper surface of this matrix is the exiting surface that is oppositely arranged with this incidence surface; This matrix inside has scattering particle; Reach the diffusing lens that the TaiWan, China patent announcement is taken off for No. 415355, this diffusing lens mainly comprises a substrate and a trickle semi-round ball layer.This trickle semi-round ball layer irritates that mould forms and when uncured; This substrate is sticked in this trickle semi-round ball layer to form a diffusing lens.And the upper surface of this diffusing lens has several trickle semi-round balls, and the basal surface of this diffusing lens then has a shiny surface.

Above-mentioned various concentration piece with light diffusion layer mostly makes the concentration piece that completes further make coarse surface layer in its bottom reprocessing, when comparatively taking a lot of work.And it is comparatively smooth that concentration piece has the one side of the parallel prism columns of plural number, during as if defectiveness, is easier to be found, and is identified as faulty materials.

Summary of the invention

In order to make concentration piece be easier to be made, and the present invention is proposed with optical scattering structure.

Fundamental purpose of the present invention is providing a kind of diffusing lens, makes the diffusion structure of concentration piece easily, saves manufacturing cost.

Another object of the present invention is providing a kind of diffusing lens, can effectively reduce the probability that the optical dispersion phenomenon of prism columns and the line that changes take place, and help to promote the production qualification rate.

Diffusing lens of the present invention is in order to the optical dispersion phenomenon that reduces prism columns and the probability that takes place of line repeatedly, and helps to promote the production qualification rate, comprises a base material, can for light wear penetrate by; One surface of this base material includes strip prism columns and the coarse diffusingsurface of plural strip that plural number is vertically arranged; Have at least between two adjacent these prism columns and have the coarse diffusingsurface of this strip, can effectively reduce the striped of the dispersion phenomenon and the atomizing prism columns of light, and reduce repeatedly the chance that line takes place, and can increase the production qualification rate of diffusing lens; Base material, vertical strip prism columns and the coarse diffusingsurface of arranging of strip of plural number can be formed in one again, therefore are easier to be made.

Description of drawings

Fig. 1 is the system synoptic diagram for the backlight of existing display;

Fig. 2 is the synoptic diagram of existing concentration piece;

Fig. 3 is the synoptic diagram of the various light refraction patterns of this existing concentration piece;

Fig. 4 is the distribution plan of the colourity of known concentration piece to the visual angle;

Fig. 5 is the synoptic diagram of diffusing lens embodiment of the present invention;

Fig. 6 is the synoptic diagram of diffusing lens light diffusion of the present invention;

Fig. 7 is the distribution plan of the colourity of diffusing lens of the present invention to the visual angle.

Embodiment

Purpose of the present invention, effect see also drawings and Examples, are described in detail as follows.

See also shown in Fig. 5,6,7.Diffusing lens of the present invention is the probability that takes place in order to the optical dispersion phenomenon that reduces prism columns and the line that changes, and helps to promote the production qualification rate.The diffusing lens 30 of embodiments of the invention comprises: a base material 31, can for light wear penetrate by.One surface of base material 31 includes strip prism columns 32 and the coarse diffusingsurface 33 of plural strip that plural number is vertically arranged; Have at least between the two adjacent prism columns 32 and have the coarse diffusingsurface of strip 33; Each prism columns 32 has crest line 321 and first side 322 and second side 323 respectively; Crest line 321 places the extreme higher position of prism columns 32; First and second side 322,323 is extended to the surface of diffusingsurface 33 or substrate 31 respectively by the both sides of crest line 321; But outermost first and second side 322,323 extends to the surface of substrate 31 respectively.Diffusingsurface 33 loose the width of faces account for the prism columns bottom width 3% to 50% between.

Diffusing lens 30 of the present invention, the light 331 that is diffused out by the diffusingsurface between two prisms post 32 33 mixes the light 324 that prism columns 32 penetrates, as shown in Figure 6, can effectively reduce the striped of the dispersion phenomenon and the atomizing prism columns 32 of light, and reduce repeatedly the chance that line takes place; And by having the coarse diffusingsurface of strip 33 between the two adjacent prism columns 32, diffusing lens 30 whole appearances are not to present shiny surface completely, even first and second side 322,323 has a little defective, also be not easy to be found, and be considered to faulty materials, therefore can increase the production qualification rate of diffusing lens 30.

The colourity X value of diffusing lens of the present invention and colourity Y value correspond respectively to the changing value at visual angle, respectively shown in dashed curve and block curve among Fig. 7, by dashed curve and the upper and lower amplitude of variation of block curve less than shown in Fig. 4, the optical dispersion phenomenon that shows the more known concentration piece of diffusing lens of the present invention is more not obvious, and is not easy to take place the repeatedly phenomenon of line.

Diffusing lens of the present invention, be to make between the two adjacent prism columns to have the coarse diffusingsurface of strip, the light that the diffusingsurface of utilization between the two prisms post diffuses out mixes the light that prism columns penetrates, can effectively reduce the striped of the dispersion phenomenon and the atomizing prism columns of light, and reduce repeatedly the chance that line takes place, and can increase the production qualification rate of diffusing lens; Base material, vertical strip prism columns and the coarse diffusingsurface of arranging of strip of plural number can be formed in one again, therefore are easier to be made.

The above record only for utilizing the embodiment of the technology of the present invention content, anyly is familiar with modification, the variation that this skill person uses the present invention to do, and all belongs to the protection domain of claim of the present invention, and is not limited to that embodiment discloses.

Claims

1. diffusing lens is in order to the optical dispersion phenomenon that reduces prism columns and the probability that takes place of line repeatedly, it is characterized in that, comprising: a base material, for light wear penetrate by; One surface of this base material includes strip prism columns and the coarse diffusingsurface of plural strip that plural number is vertically arranged; Has the coarse diffusingsurface of this strip between per two adjacent these prism columns; The width of the diffusingsurface that this strip is coarse account for this prism columns bottom width 3% to 50% between.

2. diffusing lens as claimed in claim 1 is characterized in that, described this each prism columns has crest line, first side and second side respectively; This crest line places the extreme higher position of this prism columns; This first and second side respectively by the both sides of this crest line extend to this diffusingsurface or base material the surface one of them; But outermost this first and second side extends to the surface of this base material respectively.