CN101295048A - Optical sheet, backlight unit and liquid crystal display device using the same - Google Patents

Optical sheet, backlight unit and liquid crystal display device using the same Download PDF

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Publication number
CN101295048A
CN101295048A CNA2008101287982A CN200810128798A CN101295048A CN 101295048 A CN101295048 A CN 101295048A CN A2008101287982 A CNA2008101287982 A CN A2008101287982A CN 200810128798 A CN200810128798 A CN 200810128798A CN 101295048 A CN101295048 A CN 101295048A
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CN
China
Prior art keywords
optical sheet
resin
component prism
light
scattering particles
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CNA2008101287982A
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Chinese (zh)
Inventor
朱翰毕
李廷勋
李承浩
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LG Electronics Inc
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LG Electronics Inc
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Filing date
Publication date
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Publication of CN101295048A publication Critical patent/CN101295048A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
    • G02B5/0242—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of dispersed particles
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Mathematical Physics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Liquid Crystal (AREA)
  • Planar Illumination Modules (AREA)

Abstract

Disclosed is an optical sheet and an LCD device comprising the optical sheet. The optical sheet comprises a base film; and a prism part disposed on one surface of the base film, and comprising a plurality of peaks and a plurality of valleys; wherein the prism part comprises a plurality of diffusion particles, and the prism part is arranged along a longitudinal direction and a height of each peak varies as the peak goes along the longitudinal direction.

Description

Optical sheet and liquid crystal display with optical sheet
The application requires in the right of priority of the 10-2007-0025439 that the Korean Patent Application No. that on March 15th, 2007 proposed is 10-2007-0025433, March 15 in 2007 proposed, 10-2007-0120393 that on November 23rd, 2007 proposed, and it comprises it with as a reference fully at this.
Technical field
The application relates to optical sheet and has the liquid crystal display of this optical sheet.
Background technology
Liquid crystal display (LCD) is thin, the flat-panel display devices that can come presentation video by the transmissivity that changes liquid crystal molecule.
Be categorized as the common LCD equipment of passive matrix displays, comprise the LCD panel that is used for display image and be positioned at below the LCD panel so that the back light unit of light to be provided to the LCD panel.
Back light unit comprises light source and the optical sheet that produces light.This optical sheet comprises diffusion sheet, prismatic lens and screening glass.
The light that sends from light source is collected towards the LCD panel by prismatic lens then by the diffusion sheet scattering.
Yet because diffusion sheet and prismatic lens need preparation dividually, traditional LC D equipment has the restriction of size for example and/or weight.
Summary of the invention
One aspect of the present invention provides the diffusion sheet that do not have separately and prismatic lens and can improve the optical sheet of optical property and the liquid crystal display with this optical sheet.
In one aspect, provide a kind of optical sheet, having comprised: substrate film; Be arranged on a lip-deep component prism of substrate film, and comprise a plurality of peaks and a plurality of paddy; Wherein this component prism comprises a plurality of scattering particles, and component prism is longitudinally arranged, when the peak extends longitudinally, and the height change at each peak.
In one aspect of the method, provide a kind of optical sheet, having comprised: substrate film; Be arranged on a lip-deep component prism of substrate film, and comprise a plurality of peaks and a plurality of paddy; Wherein component prism comprises a plurality of scattering particles, and component prism is longitudinally arranged, and peak and paddy are arranged with zig-zag fashion.
In a further aspect, provide a kind of optical sheet, having comprised: substrate film; Be arranged on a lip-deep component prism of substrate film, and comprise first resin and a plurality of scattering particles, the difference of the refractive index of the refractive index of scattering particles and first resin is basically in the scope between 0.01 and 0.5.
In a further aspect, provide a kind of liquid crystal display, having comprised: light source; Be arranged on the optical sheet on the light source; Be arranged on the display panels on the optical sheet, wherein optical sheet comprises substrate film; Be arranged on a lip-deep component prism of substrate film, and comprise resin and a plurality of scattering particles, the difference of the refractive index of the refractive index of scattering particles and first resin is basically in the scope between 0.01 and 0.5.
Description of drawings
Comprise and further understanding of the present invention be provided in conjunction with the accompanying drawings and constitute the part of this instructions that accompanying drawing is represented embodiments of the invention and be used from instructions one to explain principle of the present invention.
Fig. 1 is the cross-sectional view of expression LCD equipment of exemplary embodiments according to the present invention.
Fig. 2 is the cross-sectional view of the LCD panel of the LCD equipment shown in the presentation graphs 1.
Fig. 3 is the cross-sectional view of expression LCD equipment of another exemplary embodiments according to the present invention.
Fig. 4 is the skeleton view of expression optical sheet of first exemplary embodiments according to the present invention.
Fig. 5 is the side view of optical sheet shown in Figure 4.
Fig. 6 is the skeleton view of expression optical sheet of second exemplary embodiments according to the present invention, and Fig. 7 is the skeleton view of expression optical sheet of the 3rd exemplary embodiments according to the present invention.
Fig. 8 is the side view of optical sheet shown in Figure 6.
Fig. 9 is the skeleton view of expression optical sheet of the 4th exemplary embodiments according to the present invention.
Figure 10 is the side view of optical sheet shown in Figure 9.
Figure 11 is the skeleton view of expression optical sheet of the 5th exemplary embodiments according to the present invention, and Figure 12 is the skeleton view of expression optical sheet of the 6th exemplary embodiments according to the present invention.
Figure 13 is the side view of optical sheet shown in Figure 11.
Figure 14 is the skeleton view of expression optical sheet of the 7th exemplary embodiments according to the present invention.
Figure 15 is the side view of optical sheet shown in Figure 14.
Figure 16 is the skeleton view of expression optical sheet of the 8th exemplary embodiments according to the present invention, and Figure 17 is the skeleton view of expression optical sheet of the 9th exemplary embodiments according to the present invention.
Figure 18 is the side view of optical sheet shown in Figure 16.
Figure 19 is the skeleton view of expression optical sheet of the tenth exemplary embodiments according to the present invention.
Figure 20 is the side view of optical sheet shown in Figure 19.
Figure 21 is the skeleton view of expression optical sheet of the 11 exemplary embodiments according to the present invention, and Figure 22 is the skeleton view of expression optical sheet of the 12 exemplary embodiments according to the present invention.
Figure 23 is the side view of optical sheet shown in Figure 21.
Figure 24 is the cross-sectional view of expression optical sheet of exemplary embodiments according to the present invention.
Figure 25 is the brightness curve by the light of the output of optical sheet formed according to the present invention and conventional prism sheet.
Figure 26 and Figure 27 are respectively the skeleton view and the planimetric maps of expression optical sheet of another exemplary embodiments according to the present invention.
Figure 28 is the skeleton view of expression optical sheet of another exemplary embodiments according to the present invention.
Figure 29 and Figure 30 are respectively the skeleton view and the partial cross section views of expression back light unit of exemplary embodiments according to the present invention.
Figure 31 and Figure 32 are respectively the skeleton view and the partial cross section views of expression back light unit of another exemplary embodiments according to the present invention.
Figure 33 and Figure 34 are respectively the skeleton view and the partial cross section views of expression LCD equipment of exemplary embodiments according to the present invention.
Embodiment
To describe embodiments of the invention in detail now, its example is represented in the accompanying drawings.
Exemplary embodiments of the present invention provides a kind of optical sheet, comprising: substrate film; Be arranged on a lip-deep component prism of substrate film, and comprise a plurality of peaks and a plurality of paddy; Wherein component prism comprises a plurality of scattering particles, and component prism is longitudinally arranged, when the peak extends longitudinally, and the height change at each peak.
Optical sheet further comprises another the lip-deep protective seam that is arranged on substrate film, and this protective seam comprises second resin and a plurality of bead.
The diameter of bead is essentially 2 μ m to 10 μ m.
The height random ground at each peak changes or periodically changes.
Component prism comprises first resin, and based on the scattering particles of 1 to 10 weight portion of first resin of 100 weight portions.
Component prism comprises first resin, and the difference of the refractive index of scattering particles and the refractive index of this resin is basically in the scope between 0.01 and 0.5.
Peak and paddy are longitudinally arranged on component prism with zig-zag fashion.
Another exemplary embodiments of the present invention provides a kind of optical sheet, comprising: substrate film; Be arranged on a lip-deep component prism of substrate film, and comprise a plurality of peaks and a plurality of paddy; Wherein component prism comprises a plurality of scattering particles, and component prism is longitudinally arranged, and peak and paddy are arranged with zig-zag fashion.
Optical sheet further comprises another the lip-deep protective seam that is arranged on substrate film, and this protective seam comprises second resin and a plurality of bead.
The diameter of bead is essentially 2 μ m to 10 μ m.
Peak and paddy change randomly with serrate or periodically change.
Component prism comprises first resin, and based on the scattering particles of 1 to 10 weight portion of this resin of 100 weight portions.
Component prism comprises first resin, and the difference of the refractive index of scattering particles and the refractive index of this resin is basically in the scope between 0.01 and 0.5.
Another embodiment of the present invention provides a kind of optical sheet, comprising: substrate film; Be arranged on a lip-deep component prism of substrate film, and comprise first resin and a plurality of scattering particles, the difference of the refractive index of the refractive index of scattering particles and first resin is basically in the scope between 0.01 and 0.5.
Scattering particles can be beads.
Component prism comprises first resin, and based on the scattering particles of 1 to 10 weight portion of first resin of 100 weight portions.
These scattering particles can be made by at least one that select the group of forming from polymethylmethacrylate (PMMA), polystyrene and silicon.
This component prism comprises a plurality of peaks and a plurality of paddy, and the height at each peak longitudinally changes on component prism randomly.
Optical sheet further comprises another the lip-deep protective seam that is arranged on substrate film, and this protective seam comprises second resin and a plurality of bead.
Component prism comprises second resin, and based on the bead of 1 to 50 weight portion of second resin of 100 weight portions.
Another exemplary embodiments of the present invention provides a kind of liquid crystal display, comprising: light source; Be arranged on the optical sheet on the light source; Be arranged on the display panels on the optical sheet, wherein optical sheet comprises substrate film; Be arranged on a lip-deep component prism of substrate film, and comprise resin and a plurality of scattering particles, the difference of the refractive index of the refractive index of scattering particles and first resin is basically in the scope between 0.01 and 0.5.
Hereinafter, will be described in greater detail with reference to the attached drawings exemplary embodiments of the present invention.
Fig. 1 is the cross-sectional view of expression LCD equipment 200 of exemplary embodiments according to the present invention.
Fig. 2 is the cross-sectional view of the LCD panel of the LCD equipment 200 shown in the presentation graphs 1.
With reference to figure 1 and Fig. 2, LCD equipment 200 comprises LCD panel 210 and back light unit 220.LCD panel 210 is according to the drive signal and the data-signal display image that provide from external unit.Back light unit 220 be placed on LCD panel 210 below illuminate LCD panel 210.
LCD panel 210 comprises down substrate 210a, goes up substrate 210b, down polarization film 211a, go up polarization film 211b, color filter 212, black matrix 213, public electrode 214, tft array 215, pixel electrode 216 and liquid crystal layer 217.
Color filter 212 comprises the red color filter part that shows red image, green image and blue image respectively, green color filter part and blue color filter part.
Tft array 215 plays the switch block with pixel electrode 216 opening and closing.
The liquid crystal molecule that is included in the liquid crystal layer 217 is arranged according to the voltage that is applied between public electrode 214 and the pixel electrode 216.
The light that produces from back light unit 220 is by liquid crystal layer 217 and illuminate color filter 212.
Can understand that the precise structural characteristics of LCD panel 210 is unimportant aspect understanding and embodiment the present invention, moreover spirit of the present invention can be used for generally being used for any LCD panel of LCD equipment.Therefore, scope of the present invention should not be interpreted as the restriction of the said structure of LCD panel 210.
Back light unit 220 comprises light source cell 230, light guide plate 240, reflector plate 250 and optical sheet 260.Back light unit 220 further comprises selectable screening glass 280.
In this embodiment, will describe the edge-light type back light unit, wherein near the two ends of light guide plate 240, arrange light source 230.Certainly, another kind of edge-light type back light unit can be used for according to LCD equipment of the present invention, and wherein light source cell 230 only is arranged near the end of light guide plate 240.
Light source cell 230 comprises light source 230a and reflecting plate 230b.The light of light source 230a emission regulation spectrum, for example white light.Reflecting plate 230b is set at the outside of light source 230a and comes reflected light.Light source 230a can comprise cold-cathode fluorescence lamp (CCFL), electrode fluorescence lamp (EEFL) and light emitting diode (LED), but is not limited thereto.
The light that produces from light source 230a incides on the side or reflecting plate 230b of light guide plate 240, and it is successively with this side of incident light reflected back.
Equally, reflecting plate 230b improves the light quantity that is directed to light guide plate 240 to the light that light guide plate 240 reflection source 230a produce.This helps to improve optical efficiency.Reflecting plate 230b is by high reflecting material manufacturing, and has in its surface and be coated with silver-colored film.
Because light source cell 230 is set near back light unit 220 1 sides, it has difficulty on the whole surface that will be scattered to back light unit 220 by the light that light source cell 230 produces equably the time.
Light guide plate 240 allows light to be scattered to equably on the whole surface of back light unit 220.
More specifically, light guide plate 240 can guide from the light of light source cell 230 incidents and cross its incidence surface, directive LCD panel 210.
For this reason, design light guide plate 240 is so that the continuous total reflection of incident light takes place with the angle less than critical angle in light guide plate 240.Light is propagated and to be crossed the end face of light guide plate 240, light-emitting area for example, directive LCD panel 210.
Light guide plate 240 can be by acryl resin, and for example polymethylmethacrylate (PMMA) is made.
Reflector plate 250 be set at light guide plate 240 below, come light to light guide plate 240 reflected backs guiding diffusion sheet 250.
Reflector plate 250 can be on the sheet of laminated silver form by applying titanium layer, and it can be made by any of SUS, brass, aluminium and PET, is absorbed and any possible distortion that causes by long term thermal preventing.
Simultaneously, reflector plate 250 can be by its surface by projection and the PET sheet of scatter incident light is made.
Back light unit 220 can further comprise one or more optics (not shown), these opticses allow light by light guide plate 240 arriving the surface of watching of LCD panel 210 effectively, and be scattered in the watching on the surface of LCD panel 210 equably.
Optical sheet 260 becomes non-perpendicular light into vertical light about the surface of watching of LCD panel 210, makes it possible to collect effectively the light of directive LCD panel 210 and obtains effective wide visual angle.To provide illustrating in greater detail of optical sheet 260 after a while.
Screening glass 280 is set at any infringement that prevents on the optical sheet 260 optical sheet 260.More specifically, optical sheet 280 can prevent any infringement of optical sheet 260, for example scratch that causes by optical sheet 260 direct contact LCD panels 210, and widen within the limits prescribed by narrow visual angle, optical sheet 260 lanes.
Screening glass 280 comprises the scattering layer (not shown) with low blur level and high-transmission rate, so that obtain about from the best dispersion effect of optical sheet 260 to the light of LCD panel 210 guiding.
The precise structural characteristics that should be understood that screening glass 280 is unimportant aspect understanding and embodiment the present invention, moreover spirit of the present invention can be used for generally being used for any screening glass 280 of back light unit.
Because optical sheet 260 can provide the function of screening glass 280, for example therefore scattering function can dispose the back light unit 220 that does not have independent screening glass 280.
Fig. 3 is the cross-sectional view of LCD equipment 300 in accordance with another embodiment of the present invention.
With reference to figure 3, direct sunshine type back light unit 320 is used for LCD equipment 300.
Hereinafter, the explanation of LCD equipment 300 will concentrate in the difference between edge-light type back light unit 220 and the direct sunshine type back light unit 320.Parts of equal value or that be similar to the foregoing description will have identical reference number, and will omit detailed description.
The light of the predetermined spectrum of light source 330 emissions illuminates LCD panel 210.Light source 330a comprises cold-cathode fluorescence lamp (CCFL), electrode fluorescence lamp (EEFL) and light emitting diode (LED), but is not limited thereto.
Optical sheet 340 side within it has constant figure and eliminates from the radiation of the light of light source 330 emission.Optical sheet 340 can be formed by for example polymethylmethacrylate (PMMA).
Framework 350 provides the space that holds light source 330.Reflector plate 360 selectively is arranged on the framework 350.
Reflector plate 360 improves the optical efficiency of LCD panel 210 to the light of LCD panel 210 reflected backs guiding reflector plate 360.
Reflector plate 360 can be on the sheet of laminated silver form by applying titanium layer, and it can be made by any of SUS, brass, aluminium and PET, is absorbed and any possible distortion that causes by long term thermal preventing.
Simultaneously, reflector plate 360 can be made with the PET sheet of scatter incident light by projection by its surface.
As mentioned above, technical spirit of the present invention can be used for direct sunshine type back light unit 320, and edge-light type back light unit 220.
Can understand that the structure of LCD equipment is not limited to those shown in the accompanying drawing, optical sheet of the present invention can be used for any structure of the general LCD equipment that uses.
Fig. 4 is the skeleton view of expression optical sheet 260A of first exemplary embodiments according to the present invention, and Fig. 5 is the side view of the optical sheet 260A shown in Fig. 4.
Fig. 6 is the skeleton view of expression optical sheet 260B of second exemplary embodiments according to the present invention, and Fig. 7 is the skeleton view of expression optical sheet 260B of the 3rd exemplary embodiments according to the present invention.
Fig. 8 is the side view of optical sheet 260B shown in Figure 6.
With reference to figure 4, optical sheet 260A comprises substrate film 262a and component prism 263a.With reference to figure 6 and Fig. 7, optical sheet 260B comprises substrate film 262b and component prism 263b.Optical sheet 260B further comprises protective seam 270b with the different optical sheet 260B that are of optical sheet 260A.
Component prism 263a comprises a plurality of peak 264a and a plurality of paddy 266a.Component prism 263b comprises a plurality of peak 264b and a plurality of paddy 266b.Peak 264a is in height different according to the position with 264b.
Shown in Fig. 5 and 8, peak 264a and 264b are formed on substrate film 262a and the 262b continuously along a direction respectively, and each has periodically variable height.
Do not limit the method for making optical sheet 260A and 260B particularly.For example, by in mode of vibration (not shown) periodically, carry out surface treatment on optical sheet 260A and 260B, make optical sheet 260A and 260B so that the height of peak 264a and 264b changes continuously, this has formed optical sheet 260A and 260B.
Although Fig. 5 and Fig. 8 represent the periodically variable situation of the maximum height of peak 264a and 264b, the invention is not restricted to this.For example, optical sheet 260A and 260B can be set, so that the height of peak 264a and 264b periodically changes, and maximum height remains unchanged.
Make the height difference of peak 264a and 264b can reduce the possibility that optical sheet 260A and 260B contact with other parts, and reduce the generation of Moire pattern.
Substrate film 262a and 262b can be by the material formation that has about the superperformance of light transmission rate, mechanical property, particularly shockproof properties, heat resistanceheat resistant and other Electronic Performance.Such material can comprise thermoplastic, for example polymethylmethacrylate (PMMA), polyethylene terephthalate (PET) and polycarbonate (PC).
Component prism 263a comprises the first resin 267a and scattering particles 268a, and component prism 263b comprises the first resin 267b and scattering particles 268b.
The first resin 267a and 267b are formed by resin-based materials, for example acryl resin.Acryl resin can comprise polyacrylate and PMMA.
Scattering particles 268a and 268b are distributed in resin 267a and the 267b, cross the light of substrate film 262 and 262b incident with scattering respectively.
Scattering particles 268a and 268b can be formed by transparent resin or opaque slightly material.Scattering particles 268a and 268b comprise bead.
The size of each scattering particles 268a and 268b can be constant, perhaps changes with the condition of using optical sheet 260A and 260B.
Component prism comprises first resin and based on the scattering particles 268a and the 268b of 1 to 10 weight portion of first resin of 100 weight portions.
Between the first resin 267a and the scattering particles 268a and the refringence between the first resin 267b and the scattering particles 268b about 0.01 in about 0.5 the scope.
Protective seam 270b can improve optical sheet 260b heat resistanceheat resistant performance, and equably scattering from light guide plate 240 or be arranged on the light of optical sheet 340 incidents under it.
Protective seam 270b comprises the second resin 272b and is distributed in the interior a plurality of bead 274b of the second resin 272b.
The second resin 272b can be formed by the transparent acrylic resin with good heat resistanceheat resistant and mechanical property.Acryl resin comprises polyacrylate and PMMA.
Protective seam comprises the second resin 272b and based on the bead 274b of about 10 to 50 weight portions of the second resin 272b of 100 weight portions.
Can select the diameter of bead 274b according to the thickness of optical sheet 260b suitably, for example in about 2 μ m arrive about 10 μ m.
In this exemplary embodiments, the diameter substantially constant of bead 274.And bead 274 can be evenly distributed in the second resin 272b.This not only helps to reduce the possibility of blurring effect, has also improved brightness.
Certainly, each bead 274b can have the diameter different with other bead, and bead 274b can be distributed in the second resin 272b randomly.This causes the increase of blurring effect, and it can further improve successively and prevents to contact the abrasive generation that causes by physics.
In addition, protective seam 270b can prevent the distortion of the optical sheet 260B that causes owing to heat that light source 230a and 330 produces.That is, the high heat resistanceheat resistant second resin 272b can prevent that optical sheet 260b is wrinkling, and allows optical sheet 260B at high temperature to be out of shape, at room temperature to return its initial appearance.
And protective seam 270b can prevent the infringement of optical sheet 260B by external impact or physical force.
Fig. 9 is the skeleton view of expression optical sheet 460A of the 4th exemplary embodiments according to the present invention.
Figure 10 is the side view of optical sheet 460A shown in Figure 9.
Figure 11 is the skeleton view of expression optical sheet 460B of the 5th exemplary embodiments according to the present invention, and Figure 12 is the skeleton view of expression optical sheet 460B of the 6th exemplary embodiments according to the present invention.
Figure 13 is the side view of optical sheet 460B shown in Figure 11.
With reference to figure 9, optical sheet 460A comprises substrate film 462a and component prism 463a.With reference to Figure 11 and 12, optical sheet 460B comprises substrate film 462b and component prism 463b.
The difference of optical sheet 460B and optical sheet 460A is that optical sheet 460B further comprises protective seam 470b.
Component prism 463a comprises a plurality of peak 464a and a plurality of paddy 466a.Component prism 463b comprises a plurality of peak 464b and a plurality of paddy 466b.Component prism 463a comprises the first resin 467a and scattering particles 468a, and component prism 463b comprises the first resin 467b and scattering particles 468b.
Component prism comprises first resin and based on the scattering particles 468a and the 468b of 1 to 10 weight portion of first resin of 100 weight portions.
Peak 464a is in height different according to the position with 464b.As shown in Figure 10 and 13, peak 464a and 464b can form on substrate film 462a and 462b along a direction respectively continuously, and each has the height of random variation.
Do not limit the method for making optical sheet 460A and 460B particularly.For example, in the time of by mode of vibration (not shown) randomly, carry out surface treatment on optical sheet 460A and 460B, make optical sheet 460A and 460B so that the height random ground of peak 464a and 464b changes, this has formed optical sheet 460A and 460B.
The height of random variation makes and is difficult to notice owing to contact any possible infringement to optical sheet 460A and 460B that causes with other optics like this.
Protective seam 470b can improve the heat resistanceheat resistant performance of optical sheet 460b, and equably scattering from light guide plate 240 or be arranged on the light of optical sheet 340 incidents under it.
Protective seam 470b comprises the second resin 472b and is distributed in the interior a plurality of bead 474b of the second resin 472b.Therefore, with the above-mentioned second resin 472b that do not repeat to have provided and the detailed description of bead 474b.
Figure 14 is the skeleton view of expression optical sheet 560A of the 7th exemplary embodiments according to the present invention.
Figure 15 is the side view of optical sheet 560A shown in Figure 14.
Figure 16 is the skeleton view of expression optical sheet 560B of the 8th exemplary embodiments according to the present invention, and Figure 17 is the skeleton view of the optical sheet 560B of the 9th exemplary embodiments according to the present invention.
Figure 18 is the side view of optical sheet 560B shown in Figure 16.
With reference to Figure 14, optical sheet 560A comprises substrate film 562a and component prism 563a.Referring to figs. 16 and 17, optical sheet 560B comprises substrate film 562b and component prism 563b.
Optical sheet 560B is different from optical sheet 560A and is that optical sheet 560B further comprises protective seam 570b.
Component prism 563a comprises a plurality of peak 564a and a plurality of paddy 566a.Component prism 563b comprises a plurality of peak 564b and a plurality of paddy 566b.Shown in Figure 15 and 18, peak 564a and 564b and paddy 566a and 566b form with serrate on substrate film 562a and 562b respectively.
Do not limit the method for making optical sheet 560A and 560B particularly.For example, in mode of vibration (not shown) periodically, by on optical sheet 560A and 560B, carrying out surface treatment, make optical sheet 560A and 560B so that peak 564a and 564b and paddy 566a and 566b form zigzag figure on substrate film 562a and 562b, formed optical sheet 560A and 560B like this.
This crenellation pattern can form curved surface on optical sheet 560a and 560b, it causes that the light by optical sheet 560A and 560B is refracted.Substrate film 562a and 562b can be by the material formation that has about the superperformance of light transmission rate, mechanical property, particularly shockproof properties, heat resistanceheat resistant and other Electronic Performance.Such material can comprise thermoplastic, for example polymethylmethacrylate (PMMA), polyethylene terephthalate (PET) and polycarbonate (PC), but be not limited thereto.Component prism 563a comprises the first resin 567a and scattering particles 568a, and component prism 563b comprises the first resin 567b and scattering particles 568b.
The first resin 567a and 567b can be formed by resin-based materials, for example acryl resin.This acryl resin comprises polyacrylate and PMMA.
Scattering particles 568a and 568b are distributed in respectively in resin 567a and the 567b, come scattering to cross the light of substrate film 562a and 562b incident.Scattering particles 568a and 568b can be formed by transparent resin or opaque slightly material.Scattering particles 568a and 568b comprise bead.
The size of each scattering particles 568a and 568b can be constant or changes with the condition of using optical sheet 560A and 560B.
Scattering particles 568a and 568b can be basically with 1 weight portion to 10 weight portions basically and be comprised among the first resin 567a and the 567b.Between the first resin 567a and the scattering particles 568a and the difference of the refractive index between the first resin 567b and the scattering particles 568b in about scope of 0.01 to 0.5.This detailed explanation is identical with in the above-mentioned exemplary embodiments those, therefore will no longer repeat.
Protective seam 570b can improve the heat resistanceheat resistant character of optical sheet 560b, and equably scattering from light guide plate 240 or be arranged on the light of optical sheet 340 incidents under it.
Protective seam 570b comprises the second resin 572b and is distributed in the interior a plurality of bead 574b of the second resin 572b.
The second resin 572b can be formed by the transparent acrylic resin with good heat resistanceheat resistant and mechanical property.This acryl resin comprises polyacrylate and PMMA.
Protective seam 570b comprises the second resin 572b and based on part bead 574b of about 10 to 50 weight of second resin of 100 weight portions.
Can select the diameter of bead 574b based on the thickness of optical sheet 560b suitably, for example in about 2 μ m arrive about 10 μ m.
In this exemplary embodiments, the diameter substantially constant of bead 574b.And bead 574b is evenly distributed in the second resin 572b.This not only helps to reduce the possibility of blurring effect, and helps to increase brightness.
Certainly, each bead 574b can have the diameter different with other bead, and bead 574b can be distributed in the second resin 572b randomly.This causes the increase of blurring effect, and this further successively raising prevents owing to physics contacts the abrasive generation that causes.
In addition, protective seam 570b can prevent the distortion of the optical sheet 560B that causes owing to heat that light source 230a and 330 produces.That is, the high heat resistanceheat resistant second resin 572b can prevent that optical sheet 560b is wrinkling, and allows optical sheet 560B at high temperature to be out of shape, at room temperature to return its initial appearance.
And protective seam 570b can prevent the infringement of optical sheet 560B by external impact or physical force.
Figure 19 is the skeleton view of expression optical sheet 660A of the tenth exemplary embodiments according to the present invention.
Figure 20 is the side view of optical sheet 660A shown in Figure 19.
Figure 21 is the skeleton view of expression according to the optical sheet 660B of the present invention's the 11 exemplary embodiments, and Figure 22 is the skeleton view of the optical sheet 660B of the 12 exemplary embodiments according to the present invention.
Figure 23 is the side view of optical sheet 660B shown in Figure 21.
With reference to Figure 19, optical sheet 660A comprises substrate 662a and component prism 663a.With reference to Figure 21 and 22, optical sheet 660B comprises substrate film 662b and component prism 663b.Optical sheet 660B is different from optical sheet 660A and is that optical sheet 660B further comprises protective seam 670b.
Component prism 663a comprises a plurality of peak 664a and a plurality of paddy 666a.Component prism 663b comprises a plurality of peak 664b and a plurality of paddy 666b.Shown in Figure 20 and 23, peak 663a and 664b and paddy 666a and 666b form with serrate on substrate film 662a and 662b respectively brokenly.
Component prism 663a comprises the first resin 667a and scattering particles 668a, and component prism 663b comprises the first resin 667b and scattering particles 668b.
Component prism comprises first resin and based on the scattering particles 668a and the 668b of 1 to 10 weight portion of first resin of 100 weight portions.
Do not limit the method for making optical sheet 660A and 660B particularly.For example, in mode of vibration (not shown) periodically, by on optical sheet 660A and 660B, carrying out surface treatment, make optical sheet 660A and 660B so that peak 664a and 664b and paddy 666a and 666b form zigzag figure on substrate film 662a and 662b, formed optical sheet 660A and 660B like this.
Randomly shaped like this peak 664a and 664b and paddy 666a and 666b make be difficult to notice since contact with other optics cause to optical sheet 660A and any possible infringement of 660B, and also reduce the generation of Moire pattern.
Protective seam 670b can improve the heat resistanceheat resistant performance of optical sheet 660b, and equably scattering from light guide plate 240 or be arranged on the light of optical sheet 340 incidents under it.
Protective seam 670b comprises the second resin 672b and is distributed in the interior a plurality of bead 674b of the second resin 672b.Therefore, above-mentioned second resin 672b that has provided and the detailed description of bead 674b will do not repeated.
Figure 24 is the cross-sectional view of expression according to the optical sheet 735 of exemplary embodiments of the present invention.
With reference to Figure 24, optical sheet 735 comprises substrate film 731 and component prism 734.Component prism 734 comprises first resin 732 and a plurality of first bead 733.
The light that is produced by the light source (not shown) passes through substrate film 731.Therefore, the transparent material of selecting in the group that substrate film 731 can be made up of polyethylene terephthalate, polycarbonate, polypropylene, tygon, polystyrene and poly epoxy resin forms, but is not limited thereto.
Component prism 734 towards LCD panels 210 are collected the light that is produced by the light source (not shown).
Component prism 734 has triangular cross section.And it is bar-shaped that component prism 734 can have the long prism that extends longitudinally, but be not limited thereto.
First resin 732 can be formed by acryl resin, and any that select in the group that first bead 733 can be made up of PMMA, polystyrene and silicon forms.
Component prism comprises first resin and based on first bead 733 of 1 to 10 weight portion of first resin of 100 weight portions.
[table 1]
Weight portion based on first bead of first resin of 100 weight portions Anaclasis character
0.5 X
1 ○
3 ◎
6 ◎
9 ○
10 ○
11 X
X: bad zero: good ◎ is fine
At this, anaclasis character may be defined as the focusing of pilot light and the degree of scattering effect.When comparing,, has wide visual angle simultaneously in the preceding brightness of maintenance 80% or higher brightness because this anaclasis character is used a sheet according to optical sheet of the present invention with traditional optical sheet (not having bead).Yet,, cause narrow visual angle if first bead has based on 0.5 weight portion of first resin of 100 weight portions or still less, scattering effect can significantly reduce.Further, if first bead has based on 11 weight portions of first resin of 100 weight portions or more, can significantly reduce focusing effect.
The anaclasis character of table 1 expression when the weight portion of first bead 733 is 0.5,1,3,6,9,10 and 11 with respect to first resin 732.(the better anaclasis character of bigger value representation)
In table 1 as can be seen, when the weight portion of first bead with respect to first resin between 1 and 10 the time, anaclasis character is better.
This result represents, during in first bead 733 is comprised in first resin 732 and based on first bead 733 of 1 to 10 weight portion of first resin 732 of 100 weight portions, therefore, can improve the visual angle of LCD panel 210 in this scope,
Hereinafter, relatively and describe by the prismatic lens that forms according to the present invention and the light output brightness curve of conventional prism sheet.
In Figure 25, the brightness curve of " A " expression optical sheet of the present invention, the brightness curve of " B " expression conventional prism sheet.Further, X-axis represents that Y-axis is represented the intensity of brightness of optical sheet of the present invention and conventional prism sheet for the angle of the normal direction of optical sheet of the present invention and conventional prism sheet.
As can be seen from Figure 25, when comparing with the conventional prism sheet, optical sheet of the present invention has low-light level intensity in the scope of constant angle.It can also be seen that when the conventional prism sheet departed from constant angle, brightness suddenly reduced, but in optical sheet of the present invention, brightness reduces smoothly.Therefore, the advantage of optical sheet of the present invention is that it can provide wide effective visual angle when keeping brightness uniformity.
Each first bead 733 can have the diameter different with other bead.
And first bead 733 can be distributed in first resin 732 randomly.
First bead 733 can be embedded in first resin 732, does not expose from component prism 734.
In another exemplary embodiments, the difference of the refractive index that first bead 733 and first resin 732 have arrives in about 0.5 the scope about 0.01.
[table 2]
The refringence of first bead and first resin Light scattering character
0.005 X
0.01 ◎
0.03 ◎
0.1 ○
0.3 ○
0.5 ○
0.6 X
X: bad zero: good ◎ is fine
Table 2 shows the light scattering character when the refringence between first bead 733 and first resin 732 is 0.005,0.01,0.03,0.1,0.3,0.5 and 0.6.(bigger value representation light scattering character preferably)
In table 2 as can be seen, when the refringence between first bead 733 and first resin 732 0.01 between 0.5 the time, light scattering character is good.
This result represents that when the refringence between first bead 733 and first resin 732 was between about 0.01 to about 0.5, therefore light scattering effect the best, can improve the visual angle of LCD panel 210 in this scope.
Therefore, the refringence between first bead 733 and first resin 732 is greater than the 0.01 light scattering character that can greatly improve optical sheet, can prevent from the to lead minimizing of light quantity of LCD panel 210 of the refringence less than 0.5.
Therefore, in the optical sheet that comprises first bead 733 and first resin 732, have from about 0.01 refringence in about 0.5 scope at this, from the light of light guide plate 240 incidents because refringence can the constant angle scattering, simultaneously by first resin 732, first bead 733 and once more by first resin 732.In brief, at the light by scattering in first bead 733, by further scattering in first resin 732, therefore, can improve the blur level of light, it can improve the visual angle of LCD panel 210 again.
Hereinafter, the operation that detailed description is had the back light unit of above-mentioned optical sheet.
Light guiding optical sheet by the light source generation.Some light impinge upon on first bead that is included in the component prism, and it changes its light path again, and other light is propagated the light-emitting area that crosses component prism to the LCD panel.
Light and the collision of another first bead that its light path has been changed by first bead, and so correspondingly their light path changed once more.Its light path has been changed some light of twice and has propagated the light-emitting area cross component prism to the LCD panel, and other light that collides with another first bead changes their light path again.
The light of the light-emitting area by component prism incides on the LCD panel equably at last.
Similarly, before entering the LCD panel, incide light on the optical sheet and be repeated reflection, change light path and several times, and therefore, light can focus on the LCD panel by a plurality of bead scatterings.Therefore, optical sheet can improve the brightness comprising the LCD equipment of optical sheet.And optical sheet also can play scatter plate.
Figure 26 and 27 is respectively the skeleton view and the planimetric map of expression optical sheet 800 of another exemplary embodiments according to the present invention.
With reference to Figure 26 and 27, optical sheet 800 comprises component prism 834, and this component prism comprises as first resin in the above-mentioned exemplary embodiments of the present invention and a plurality of first bead.Therefore, the detailed description of first bead and first resin will no longer be repeated.
Each component prism 834 with peak 835 and paddy 836 is arranged on the substrate film 831 with embarking on journey.Peak 835 and paddy 836 are in the tortuous extension of a direction.Component prism 834 can have triangular cross section.Spacing between two adjacent peaks 835 can be in the scope of about 20 μ m to about 300 μ m.
Peak 835 can form on substrate film 831 with irregular serrate randomly.Mean distance between peak 835 and the adjacent peak 835 thereof is in the scope of about 1 μ m to about 20 μ m.
Paddy 836 also can form on substrate film 831 with irregular serrate randomly.Mean distance between paddy 836 and the adjacent valleys 836 thereof is in the scope of about 1 μ m to about 20 μ m.
Height between the lower surface of component prism 834 and the peak 835 can periodically change.For example, the difference in height between two peaks 835 can be in the scope of about 1 μ m to about 20 μ m.
In a word, the distance between two adjacent peaks 835 can change randomly, and the height at peak 835 can periodically change.This can prevent from easily to notice from the outside when by being placed on any infringement to optical sheet 800 that causes when other optical sheet on the optical sheet 800 is pushed, and prevent the deterioration of image quality in the LCD equipment.
Figure 28 is the skeleton view of expression according to another exemplary embodiments optical sheet 900 of the present invention.
With reference to Figure 28, optical sheet 900 comprises substrate film 931, comprises the component prism 934 of first resin and a plurality of first beads, and the protective seam 940 that forms for 931 times at substrate film.Protective seam 940 comprises second resin 941 and a plurality of second beads 942 that are distributed in second resin 941.Therefore the same in component prism 934 and the above-mentioned exemplary embodiments, will not repeat to describe in detail.
Protective seam 940 can improve the heat resistanceheat resistant performance of optical sheet 900.
Second resin 941 can be formed by the transparent acrylic resin with good heat resistanceheat resistant and mechanical property.Acryl resin can comprise polyacrylate and PMMA.
Protective seam 940 can comprise second resin 941 and based on second bead 942 of about 10 to 50 weight portions of second resin 941 of 100 weight portions.
Can select the diameter of second bead 942 based on the thickness of substrate film 931 suitably, for example at about 2 μ m to about 10 μ m.
In this exemplary embodiments, but the diameter substantial constant of second bead 942.And second bead 942 can distribute in second resin 941 equably.On the contrary, second bead 942 can have the size different with other second bead 942, and is distributed in randomly in second resin 941.
Second bead 942 can be formed by the material identical or different with first bead.
Protective seam 940 can prevent the distortion that heat that optical sheet 900 produces owing to light source causes.That is, high heat resistanceheat resistant second resin 941 can prevent that optical sheet 900 is wrinkling, and allows optical sheet 900 at high temperature to be out of shape, and at room temperature returns its original state.
And protective seam 940 prevents that optical sheet 900 is by external impact or physical force damage.
Figure 29 and Figure 30 are respectively the skeleton view and the partial cross sectional view of expression back light unit 1000 of exemplary embodiments according to the present invention.
In Figure 29, show the edge-light type back light unit.The optical sheet that is included in the back light unit 1000 is identical with above-mentioned exemplary embodiments, therefore, and with detailed.
With reference to Figure 29 and 30, back light unit 1000 is set in the LCD equipment (not shown) and provides light to LCD panel (not shown).Back light unit 1000 comprises light source 1020, optical sheet 1030, light guide plate 1040, reflecting plate 1050, bottom cover 1060 and mold framework 1070.
Light source 1020 receives external electric and produces light.
Can near a long limit of light guide plate 1040 or two long limits, provide single or a plurality of light sources 1020.Some light from light source 1020 emissions can directly incide on the light guide plate 1040, perhaps other light is at first by light shell outer cover 1022 reflections, this light shell outer cover is wrapped in the about 3/4ths of about light source 1020 whole outer surfaces around the light source 1020, and light guide plate 1040 then leads.
Light source 1020 can comprise cold-cathode fluorescence lamp (CCFL), hot-cathode fluorescent lamp (HCFL), external cathode fluorescent light (EEFL) and light emitting diode (LED), but is not limited thereto.
Optical sheet 1030 can be set to be collected on the light guide plate 1040 from the light of light source 1020 to the irradiation of LCD panel (not shown).
As mentioned above, optical sheet 1030 comprises substrate film and the component prism that is arranged on this substrate film.This component prism comprises first resin and a plurality of first bead.First bead can have the weight portion from about 1 to 10 scope with respect to first resin, and the scope of the refringence of itself and first resin is in about 0.01 to about 0.5 scope.
Therefore, even without additional optical sheet, optical sheet 1030 can improve the brightness of light.
As a result, can improve the quality of back light unit 1000.
Light guide plate 1040 can be provided in the face of light source 1020.Light guide plate 1040 guiding are made progress by the light that light source 1020 produces, promptly towards LCD panel (not shown).
Reflecting plate 1050 can be set at below the light guide plate 1040 the light reflected back LCD panel (not shown) with directive reflecting plate 1050.
Bottom cover 1060 comprises bottom part 1062 and side members 1064, and this side members is extended from bottom part 1062 and formed spatial accommodation, can hold light source 1020, optical sheet 1030, light guide plate 1040 and reflecting plate 1050 in this space.
The mold framework 1070 that comprises rectangular edges can combine with bottom cover 1060.
Figure 31 and Figure 32 are respectively skeleton view and the partial cross sectional view of expression according to the back light unit 1100 of another exemplary embodiments of the present invention.
Although Figure 31 and 32 shows direct sunshine type back light unit, the invention is not restricted to this.Identical with shown in Figure 29 and 30 of Figure 31 and the back light unit shown in 32, difference are the setting of its light source and to the variation of the parts that should distinguish.
With reference to Figure 31 and 32, back light unit 1100 is set in the LCD equipment (not shown) and provides light to LCD panel (not shown).Back light unit 1100 comprises light source 1120, optical sheet 1130, reflecting plate 1150, bottom cover 1160, mold framework 1170 and scatter plate 1180.
Light source 1120 can be arranged on below the scatter plate 1180 singlely or a plurality ofly.Therefore, the light that is produced by light source 1120 can be directly incident on scatter plate 1180.
Optical sheet 1130 can be set on the scatter plate 1180.Optical sheet 1130 is collected the light of the directive LCD panel (not shown) that is produced by light source 1120.
As mentioned above, optical sheet 1130 can comprise substrate film and the component prism that is arranged on the substrate film.Component prism comprises first resin and a plurality of first bead.First bead can have about the weight portion in 1 to 10 scope of first resin, and the refringence of itself and first resin is in about scope of 0.01 to 0.5.
Therefore, even without additional optical sheet, optical sheet 1130 also can improve the brightness of light.
As a result, can improve the quality of back light unit 1100.
Scatter plate 1180 can be set at the light that comes upwards scattering to produce from light source 1120 between light source 1120 and the optical sheet 1130, that is, and and towards optical sheet 1130.Scatter plate 1120 can play a part to prevent to see light source 1120 from the outside by back light unit 1100, and the light of further scattering light source 1120 generations.
Figure 33 and 34 is respectively the skeleton view and the partial cross sectional view of expression LCD equipment 1200 of exemplary embodiments according to the present invention.Although identical with shown in Figure 33 and 34 of Figure 29 and the back light unit shown in 30 the invention is not restricted to this.For example, Figure 31 can be used for the back light unit shown in Figure 33 and 34 with the identical back light unit shown in 32.Therefore, will omit the detailed description of back light unit, will describe its feature hereinafter separately.
With reference to Figure 33 and 34, LCD equipment 1200 comprises back light unit 1210 and LCD panel 1310.
Back light unit 1210 is set at the following next of LCD panel 1310 and provides light to LCD panel 1310.
Back light unit 1210 can comprise light source 1220, optical sheet 1230, light guide plate 1240, reflecting plate 1250, bottom cover 1260 and mold framework 1270.
LCD panel 1310 is seated on the mold framework 1270, and be securely held in top cover 1320 and and the bottom cover 1260 of top cover 1320 combination between.
LCD panel 1310 utilizes the light display image that is produced by light source 1220.
LCD panel 1310 can comprise color filter substrate 1312 and face thin film transistor (TFT) (TFT) substrate 1314 of color filter substrate 1312, have the liquid crystal layer (not shown) betwixt.
Color filter substrate 1312 can be implemented in the color of display image on the LCD panel 1310.
Color filter substrate 1312 comprises by transparent material, the base substrate that forms of glass and plastics for example, and the color filter array that is formed on base substrate by film.Color filter array can comprise red color filter, green color filter and blue color filter, but is not limited thereto.Upper deflection board can further be set on the color filter substrate 1312.
Tft array 1314 is electrically connected to printed circuit board (PCB) (PCB) 1218 by driving film 1216, and various circuit blocks are installed on this printed circuit board (PCB).Response is by the drive signal of PCB 1218 supplies, and tft array 1314 can provide the driving voltage of being supplied by PCB 1218 to the liquid crystal layer (not shown).
TFT substrate 1314 can comprise by transparent material, the base substrate that forms of glass and plastics for example, and the TFT that is formed on base substrate by film, and the pixel electrode that forms on base substrate.
The lower polarizing plate (not shown) can be set at below the TFT substrate 1314.
As mentioned above, owing to be included in the interior a plurality of beads of optical sheet component prism, but the optical sheet scattering of exemplary embodiments is also collected the light of directive LCD panel by the light that light source produces according to the present invention.
Simultaneously, can prevent that at the Feng Hegu that forms on the substrate film optical sheet is set at other optical sheet infringement on this optical sheet with sawtooth pattern.
And the protective seam that forms at the optical sheet downside can improve heat resistanceheat resistant and mechanical property.
The embodiment of front and advantage only are exemplary, should interpretation the present invention.This instruction can easily be applied to the device of other type.The description of front embodiment is illustrative, does not want to limit the scope of claim.To those skilled in the art, much substitute, modification and distortion be tangible.In the claims, device adds the function clause and wants to cover structure described here and that carry out institute's narrate function, and is not only structural equivalence, and is equivalent construction.And unless term " device " is described in the restriction of claim clearly, such restriction is not taken in 35 USC, 112 (6) times explanations.

Claims (21)

1. optical sheet comprises:
Substrate film; And
Be arranged on a lip-deep component prism of described substrate film, and comprise a plurality of peaks and a plurality of paddy;
Wherein said component prism comprises a plurality of scattering particles,
And this component prism longitudinally is provided with, and when the peak extends longitudinally, the height change at each peak.
2. optical sheet as claimed in claim 1 further comprises:
Be arranged on another lip-deep protective seam of substrate film, this protective seam comprises second resin and a plurality of bead.
3. optical sheet as claimed in claim 2,
Wherein the diameter of bead is 2 μ m to 10 μ m basically.
4. optical sheet as claimed in claim 1,
The wherein height random at each peak ground or periodically variation.
5. optical sheet as claimed in claim 1,
Wherein this component prism comprises first resin,
And based on the scattering particles of about 1 to 10 weight portion of first resin of 100 weight portions.
6. optical sheet as claimed in claim 1,
Wherein, this component prism comprises first resin,
The difference of the refractive index of the refractive index of scattering particles and first resin is basically in the scope between 0.01 and 0.5.
7. optical sheet as claimed in claim 1,
Peak and paddy longitudinally are arranged on the component prism in the sawtooth pattern mode.
8. optical sheet comprises:
Substrate film; And
Be arranged on a lip-deep component prism of substrate film, and comprise a plurality of peaks and a plurality of paddy;
Wherein this component prism comprises a plurality of scattering particles,
And this component prism longitudinally is provided with, and this peak and paddy are arranged with zig-zag fashion.
9. optical sheet as claimed in claim 8 further comprises:
Be arranged on another lip-deep protective seam of substrate film, this protective seam comprises second resin and a plurality of bead.
10. optical sheet as claimed in claim 9,
Wherein the diameter of bead is 2 μ m to 10 μ m basically.
11. optical sheet as claimed in claim 8,
Wherein this peak and this paddy change randomly or periodically with zig-zag fashion.
12. optical sheet as claimed in claim 8,
Wherein this component prism comprises first resin,
And based on the scattering particles of about 1 to 10 weight portion of the resin of 100 weight portions.
13. optical sheet as claimed in claim 8,
Wherein this component prism comprises first resin,
The difference of the refractive index of these scattering particles and the refractive index of this resin is basically in the scope between 0.01 and 0.5.
14. an optical sheet comprises:
Substrate film; And
Be arranged on a lip-deep component prism of substrate film, and comprise first resin and a plurality of scattering particles,
The difference of the refractive index of the refractive index of these scattering particles and this first resin is basically in the scope between 0.01 and 0.5.
15. optical sheet as claimed in claim 14,
Wherein these scattering particles are beads.
16. optical sheet as claimed in claim 14,
Wherein this component prism comprises first resin, and based on the scattering particles of about 1 to 10 weight portion of first resin of 100 weight portions.
17. optical sheet as claimed in claim 14,
Wherein these scattering particles are made by at least one that select the group of forming from polymethylmethacrylate (PMMA), polystyrene and silicon.
18. optical sheet as claimed in claim 14,
Wherein this component prism comprises a plurality of peaks and a plurality of paddy,
And the height at each peak longitudinally changes on this component prism randomly.
19. optical sheet as claimed in claim 14 further comprises:
Be arranged on another lip-deep protective seam of substrate film, this protective seam comprises second resin and a plurality of bead.
20. optical sheet as claimed in claim 19,
Wherein this component prism comprises second resin, and based on the bead of about 10 to 50 weight portions of second resin of 100 weight portions.
21. a liquid crystal display comprises:
Light source;
Be arranged on the optical sheet on the light source; And
Be arranged on the display panels on the optical sheet,
Wherein this optical sheet comprises,
Substrate film; And
Be arranged on a lip-deep component prism of substrate film, and comprise resin and a plurality of scattering particles,
The difference of the refractive index of the refractive index of these scattering particles and this first resin is basically in the scope between 0.01 and 0.5.
CNA2008101287982A 2007-03-15 2008-03-17 Optical sheet, backlight unit and liquid crystal display device using the same Pending CN101295048A (en)

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KR10-2007-0025433 2007-03-15
KR10-2007-0025439 2007-03-15
KR1020070025433A KR100838681B1 (en) 2007-03-15 2007-03-15 Optical sheet, backlight unit and liquid crystal display device using the same
KR10-2007-0120393 2007-11-23

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