CN1866057A - Optical plate, backlight assembly and display device having the optical plate - Google Patents
Optical plate, backlight assembly and display device having the optical plate Download PDFInfo
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- CN1866057A CN1866057A CNA2006100782875A CN200610078287A CN1866057A CN 1866057 A CN1866057 A CN 1866057A CN A2006100782875 A CNA2006100782875 A CN A2006100782875A CN 200610078287 A CN200610078287 A CN 200610078287A CN 1866057 A CN1866057 A CN 1866057A
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- optical sheet
- light
- planar substrates
- rounded
- prisms
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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
- G02F1/133602—Direct backlight
- G02F1/133604—Direct backlight with lamps
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- 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
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0051—Diffusing sheet or layer
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- 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
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/0002—Lithographic processes using patterning methods other than those involving the exposure to radiation, e.g. by stamping
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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
- G02F2203/00—Function characteristic
- G02F2203/03—Function characteristic scattering
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Abstract
An optical plate includes a planar base and a plurality of rounded prisms formed on the planar base. The rounded prisms improve a uniformity of the light passing through the planar base and then irradiate the light having the improved uniformity. A concave peak formed in each of the plurality of rounded prisms of the optical plate scatters the light provided into a rear face of the optical plate so that dark lines and bright lines are not generated on the optical plate. As a result, the optical plate has improved light efficiency.
Description
Technical field
The display device that the present invention relates to a kind of optical sheet, has the backlight assembly of this optical sheet and have this optical sheet.More specifically, the present invention relates to a kind of be used to the improve optical sheet of optical efficiency, the display device that has the backlight assembly of this optical sheet and have this optical sheet.
Background technology
Usually, the backlight assembly that uses in liquid crystal display (LCD) device has significant effects to the brightness of the image on the LCD device, outward appearance etc.Backlight assembly typically comprises lamp assembly, light guide plate or diffusing panel (diffusion plate) assembly, outer cover unit etc.
Particularly, its structure of the backlight assembly that uses in LCDTV comprises: the diffusing panel of sequence stack, diffusion disk and blast sheet (luminance-enhancing sheet).When light passes the different medium that has different refractivity in the backlight assembly structure, the transfer of energy takes place, make the wide amount that lamp produced of lamp assembly lose.
And, because in this structure, used many optical sheets,, the assembling of optical sheet becomes very difficult so handling.And, increased the cost of making complicated backlight assembly.
Fig. 1 shows the cut-open view of the light path in the backlight assembly with traditional diffusing panel.
With reference to Fig. 1, traditional diffusing panel 2 is arranged on the lamp 4 of a plurality of parallel arrangements.The light that diffusing panel 2 diffusions are sent from lamp 4 and from the light of reflecting plate 6 reflections.Then, diffusing panel 2 is upward to irradiates light.Here, in diffusing panel 2 and lamp 4 corresponding surface portions, can produce bright line (bright line) and concealed wire (dark line).Particularly, in the area I of diffusing panel 2 more contiguous lamps 4, produce bright line.On the contrary, produce concealed wire among the area I I away from lamp 4 at diffusing panel 2.
Bright line and concealed wire can change according to the thickness and the efficient of diffusing panel 2.That is the ratio that is reduced to of the thickness of the minimizing of the brightness uniformity of the increase of the transmittance of diffusing panel 2 and diffusing panel 2 and diffusing panel 2.On the contrary, the transmittance of diffusing panel 2 reduce with the increase of the thickness of the increase of the brightness uniformity of diffusing panel 2 and diffusing panel 2 proportional.These be by the increase of the increase of diffusion profile scope and light loss and light path to be dispersed into ratio caused.
In order to remove bright line and concealed wire, be arranged in optical sheet on the diffusing panel or widen lamp and diffusing panel between distance.Yet widening of the layout of optical sheet and spacing makes the thickness of LCD module increase.Therefore, one or two additional diffusion disk is installed to remove bright line and concealed wire.Yet additional diffusion disk causes increasing the cost of making backlight assembly.
In addition, the optical efficiency of traditional backlight assembly can reduce pro rata with the increase of light loss.
Summary of the invention
Embodiments of the invention provide be used to suppress the generation of bright line and concealed wire and the optical sheet that improves the prism of optical efficiency a kind of comprising, have the backlight assembly of this optical sheet that comprises prism and have the display device that this comprises the optical sheet of prism.
Optical sheet according to an embodiment of the invention comprise planar substrates and be formed on a plurality of fillets on this planar substrates (rounded, rounding, circular arc) prism.Rounded prisms has improved the uniformity of light of passing planar substrates, and then sends and have the inhomogeneity light that has improved.
Display device according to an embodiment of the invention comprises display panel, light supply apparatus and optical sheet.Display panel is used to the light display image from light supply apparatus.Light supply apparatus is positioned at the following so that luminous of display panel.The optical sheet that is used to improve uniformity of light comprises planar substrates and is formed on a plurality of rounded prisms on this planar substrates.
According to embodiments of the invention, be formed on prism on the optical excitation face of optical sheet, that have the matrix top, making provides to the light scattering at this optical sheet back side, so that can not produce concealed wire and bright line on optical sheet.So, can improve the optical efficiency of optical sheet, backlight assembly and display device.
Description of drawings
By can understanding exemplary embodiments of the present invention in more detail below in conjunction with the description of the drawings, in the accompanying drawing,
Fig. 1 shows the cut-open view of the light path in the backlight assembly with traditional diffusing panel;
Fig. 2 shows the stereographic map according to the optical sheet of an exemplary embodiments of the present invention;
Fig. 3 shows the planimetric map of optical sheet shown in Figure 2.
Fig. 4 shows the cut-open view of optical sheet shown in Figure 2;
Fig. 5 shows the cut-open view of a rounded prisms of optical sheet shown in Figure 2;
Fig. 6 shows the cut-open view of the shown optical effect that goes out of rounded prisms shown in Figure 5;
Fig. 7 shows the cut-open view according to the optical sheet of an exemplary embodiments of the present invention;
Fig. 8 A shows the cut-open view of the manufacture method of optical sheet shown in Figure 2 to Fig. 8 E;
Fig. 9 shows the cut-open view according to the backlight assembly of an exemplary embodiments of the present invention;
Figure 10 shows the curve map that the optical sheet that will have the rounded prisms array is applied to the resulting optical analysis result of flat florescent lamp;
Figure 11 shows the stereographic map according to the optical sheet of an exemplary embodiments of the present invention;
Figure 12 shows the cut-open view of optical sheet shown in Figure 11;
Figure 13 is the amplification view of ' B ' part among Figure 12, and it shows the light diffusion operation of this unit prisms;
Figure 14 shows the cut-open view according to the optical sheet of an exemplary embodiments of the present invention;
Figure 15 shows the cut-open view of the light diffusion operation of a prism in the optical sheet of Figure 14;
Figure 16 shows the cut-open view of the shown optical effect that goes out of the rounded prisms of optical sheet shown in Figure 11;
Figure 17 A shows the cut-open view of the manufacture method of optical sheet shown in Figure 11 to Figure 17 E;
Figure 18 shows the cut-open view of the backlight assembly with optical sheet shown in Figure 11;
Figure 19 shows the curve map that the optical sheet that will comprise the prism array with spill top is applied to the resulting optical analysis result of flat florescent lamp;
Figure 20 shows the exploded perspective view according to the liquid crystal display of an exemplary embodiments of the present invention (LCD) device;
Figure 21 shows the exploded perspective view according to the LCD device of an exemplary embodiments of the present invention;
Figure 22 shows the exploded perspective view according to the LCD device of an exemplary embodiments of the present invention.
Embodiment
Hereinafter with reference to accompanying drawing exemplary embodiments of the present invention is described more fully.Yet the present invention can be embodied as multiple different form, is confined to embodiment as herein described and should not be construed.
Fig. 2 shows the stereographic map according to the optical sheet of an exemplary embodiments of the present invention, Fig. 3 shows the planimetric map of optical sheet shown in Figure 2, Fig. 4 shows the cut-open view of optical sheet shown in Figure 2, and Fig. 5 shows the cut-open view of the single rounded prisms of optical sheet shown in Figure 2.
With reference to Fig. 2 to Fig. 5, the optical sheet 10 of an exemplary embodiments of the present invention comprises planar substrates 12 and lens 14.
The span of prism can for about 50 μ m to about 200 μ m.Radius-of-curvature in the rounded apex of prism can for about 15 μ m to about 76 μ m.For example, when the span of prism was 50 μ m, the radius-of-curvature in the rounded apex of prism was about 15 μ m.Alternatively, when the span of prism was 200 μ m, the radius-of-curvature in the rounded apex of prism was about 76 μ m.
And the oblique angle of prism is about 43 ° to about 47 °.The height of prism is about 50 μ m.Rounded prisms is closely aligned.
In addition, can on the bottom surface of planar substrates 12, form ultraviolet ray (UV) restraining barrier (not shown).In order to prevent that the light with higher-energy wavelength is injected into planar substrates 12, the UV restraining barrier has stopped provides the light that has the wavelength of higher-energy to all light of the bottom surface of planar substrates 12.Particularly, when planar substrates 12 by polycarbonate-based resin (PC) when making, must form the UV restraining barrier.
In addition, can on the bottom surface of planar substrates 12, form ultraviolet ray (UV) and stop the particle (not shown).UV stops that particle has stopped the light with higher-energy, is injected into planar substrates 12 to prevent the light with higher-energy wavelength.
Fig. 6 shows the cut-open view of the shown optical effect that goes out of rounded prisms shown in Figure 5.
With reference to Fig. 6, behind the hollows or upper, annular face of injecting prism backlight with pulse, backlight by the rounded apex diffusion to produce first diffused light.First diffused light has the single peak value that is lower than the backlight pulse peak value.Yet, because the top and the distance between light source of prism are shorter, only utilize the upper, annular structure of prism can not obtain desired light diffusion effect, that is, realize not occurring the bright line and the concealed wire of light source.
After the inclined-plane or trapezoidal faces of injecting prism backlight, the inclined-plane diffusion by prism backlight is to produce second diffused light.Second diffused light has two peak values, and it is lower than the peak value of the backlight pulse and first diffused light.Yet, because the inclined-plane diffusion on both direction backlight of prism, so, in optical sheet 10, can produce bright line and concealed wire.
As mentioned above, the inclined-plane of prism has remedied the above-mentioned deficiency that rounded apex caused by prism.And the rounded apex of prism has remedied the above-mentioned deficiency that the inclined-plane caused by prism.
Fig. 7 shows the cut-open view of optical sheet according to an embodiment of the invention.
With reference to Fig. 7, the optical sheet 20 of this embodiment comprises planar substrates 22, have the lens array sheet 24 of a plurality of rounded prisms and be used to the adhesive 26 that makes lens array sheet 24 physically be attached to planar substrates 22.
Planar substrates 22 comprises that thickness is the transparent plastic sheet of about 1mm to about 2mm.An example of this plastic plate comprises the material with high index of refraction, and for example polycarbonate-based resin (PC), polymethylmethacrylate are resin (PMMA) and methacrylate-styrol copolymer (MS) etc.
Lens array plate 24 comprises a plurality of prisms with rounded apex.This rounded prisms and rounded prisms shown in Figure 5 are basic identical.That is, the ratio of the base length of prism and rounded apex mean curvature radius can be about 100: 30 to 100: 38.Preferably, the ratio of the base length of prism and rounded apex mean curvature radius is about 100: 34.
Adhesive 26 can be coagulating type bonding agent and double sticky tape etc.
In this embodiment, as shown in Figure 7, adhesive 26 is between planar substrates 22 and lens array plate 24.Alternatively, can save adhesive 26.
In addition, can on the bottom surface of planar substrates 22, form ultraviolet ray (UV) restraining barrier (not shown).The UV restraining barrier has stopped provides the light that has the higher-energy wavelength to all light of the bottom surface of planar substrates 22, is injected into planar substrates 22 to prevent the light with higher-energy wavelength.
In addition, can on the bottom surface of planar substrates 22, form ultraviolet ray (UV) and stop the particle (not shown).UV stops that particle has stopped the light with higher-energy, is injected into planar substrates 22 to prevent the light with higher-energy wavelength.
Below, detailed description has the manufacture method of the optical sheet of rounded prisms array.
Fig. 8 A shows the cut-open view of the manufacture method of the optical sheet among Fig. 2 to Fig. 8 E.
With reference to Fig. 8 A, the bottom substrate SUB for about 1mm is placed on the pedestal STG with thickness.The example of this bottom substrate SUB comprises the metal such as fine copper, brass, al and ni etc.Utilize flat shape diamond tool to handle the surface of bottom substrate SUB.
With reference to Fig. 8 B, the roller ROL with tooth is rotated along the surface of the bottom substrate SUB that handled, the surface with tooth extruding bottom substrate SUB forms groove with the surface at bottom substrate SUB simultaneously.Here, the part of protruding between groove is extended along the axial direction of roller ROL.Basic identical among the span of projection, oblique angle and radius-of-curvature and Fig. 5.Alternatively, can use diamond head to replace roller ROL to form groove.Groove defines the rounded prisms of the optical sheet with rounded prisms array shape.
With reference to Fig. 8 C, the molten metal layer (not shown) is coated on the bottom substrate SUB surface.By casting iron craft this molten metal layer is solidified then, to form father's mould (father stamper) (FS).The shape of father's mould FS is opposite basically with the shape of the bottom substrate SUB with groove.
With reference to Fig. 8 D, the molten metal layer (not shown) is coated on father's mould FS.By casting iron craft this molten metal layer is solidified then, have the submodule DS of the shape opposite with formation with father's mould (FS) shape.Here, be used to form in the pressing mold process of optical sheet, produce a plurality of optical sheets, can utilize these pressing molds to make optical sheet by single step (single process) in order to utilize these pressing molds with rounded prisms array shape in manufacturing.
Here, when utilizing bottom substrate SUB to make pressing mold, the part of the bottom substrate SUB that contacts with pressing mold is worn, and the shape of the optical sheet that the bottom substrate that makes utilization wear and tear forms is undesirable.Therefore, in this embodiment, utilize the molded submodule of making of father.Then, utilize submodule manufacturing to have the optical sheet of rounded prisms array shape.
As mentioned above, make optical sheet in order to utilize these two pressing molds, father's mould FS must have the shape substantially the same with optical sheet, and bottom substrate SUB must have the shape substantially the same with submodule DS.Therefore, the shape of father's mould FS is opposite with the shape of optical sheet.
With reference to Fig. 8 E, be filled with the resin RSN of UV sclerosis in the groove of submodule DS.Planar substrates 12 is placed on the submodule DS.Here, the resin RSN of UV sclerosis can have the refractive index identical with planar substrates 12.
Make the UV radiation exposure on planar substrates 12, use the marginal portion of bar POL pressure planes substrate 12 simultaneously, be attached on the planar substrates 12, thereby make Fig. 2 to the optical sheet with rounded prisms array shown in Figure 5 with resin RSN with the UV sclerosis.
Fig. 9 shows the cut-open view of backlight assembly according to an embodiment of the invention.
With reference to Fig. 9, the backlight assembly 100 of this embodiment comprises and is used for luminous flat florescent lamp 110 and is arranged on optical sheet 120 on the flat florescent lamp 110, and it is used to improve the uniformity of light of sending from flat florescent lamp 110 and makes upwards irradiation of light.With reference to Fig. 2 to Fig. 5, optical sheet 120 comprises planar substrates 122 and the rounded prisms 124 that is formed on this planar substrates 122.Optical sheet 120 has heat-resistant quality.
Flat florescent lamp 110 comprises the lamp body with first outer electrode L20.Lamp body has a plurality of discharge spaces (discharge space) L30, and from cut-open view, it is arranged on the same substantially plane in parallel to each other continuously.
The first outer electrode L20 forms the outside surface of lamp body.The first outer electrode L20 is positioned at the two ends of the discharge space L30 on the longitudinal direction of discharge space L30, so that the first outer electrode L20 intersects with discharge space L30.
Lamp body also comprises backboard L40 and combines to form the panel L50 of discharge space L30 with backboard L40.Backboard L40 has the rectangular flat shape.For example, backboard L40 comprises and can allow visible light to pass glass substrate and stop the UV ray to pass the transparent glass substrate of glass substrate.Panel L50 and backboard L40 assembling are to form discharge space L30.For example, panel L50 can comprise identical with backboard L40 basically transparent glass substrate.
Panel L50 comprises: a plurality of discharge space partial L 52, and itself and backboard L40 separate, to form discharge space L30; A plurality of separated by spaces partial L 54, it is connected between the adjacent discharge space partial L 52 and with backboard L40 and contacts; And hermetic unit L56, its be formed on and the edge of separated by spaces partial L 54 between and combine with backboard L40.
The various discharge gass that will be used for plasma discharge inject discharge space L30.The example of this discharge gas comprises mercury (Hg), nitrogen (Ne), xenon (Xe), krypton (Kr) etc.The air pressure of discharge gas is about 50torr in the discharge space L30.Therefore, produced pressure differential between the atmospheric pressure of this air pressure and about 760torr.This pressure differential has produced the power that is applied to the lamp body inner space from the outside of lamp body, because this power makes separated by spaces partial L 54 closely contact with backboard L40.
Lamp body also comprises: be formed on the reflection horizon L44 on the backboard L40, be formed on the first fluorescence coating L42 on the L44 of reflection horizon, and be formed on the second fluorescence coating L58 under the panel L50.Encourage the first fluorescence coating L42 and the second fluorescence coating L58 by the UV ray that plasma discharge produced, to send visible light.Reflection horizon L44 makes the light that is produced by the first fluorescence coating L42 and the second fluorescence coating L58 reflex to panel L50, to prevent that light from passing through backboard L40 and leaking.
On the outer surface of panel L50, form the first outer electrode L20.With the first outer electrode L20 to be arranged in the two ends of panel L50 with the vertically vertical substantially direction of discharge space partial L 52.Therefore, the end of the first outer electrode L20 and all discharge space L30 is overlapping.
In the residing zone of discharge space L30, send relatively large light.On the contrary, in not being set, the zone of discharge space sends more a spot of light.So, in sending the zone of relatively large light, produce bright line.On the other hand, in the zone of sending, produce details in a play not acted out on stage, but told through dialogues than a little light.
Yet, strengthened diffusion of light according to the rounded prisms of optical sheet 120 of the present invention.So, can suppress the bright line on the optical sheet 120 and the generation of details in a play not acted out on stage, but told through dialogues.And, can reduce the luminance difference between bright line and the details in a play not acted out on stage, but told through dialogues.
In this embodiment, in having the backlight assembly of flat florescent lamp, used optical sheet with rounded prisms array shape.Alternatively, for the person skilled in art, obviously can be, have in the backlight assembly etc. of a plurality of light emitting diodes and use optical sheet with rounded prisms array shape at direct illumination type backlight assembly.
Figure 10 shows the curve map that the optical sheet that will have the rounded prisms array is applied to the optical analysis result that flat florescent lamp obtains.
With reference to Figure 10, the conventional optical sheet of lenticular lens array type makes has the backlight diffusion of about 80cd/m2 to about 750cd/m2 brightness, has extremely brightness backlight of about 680cd/m2 of about 520cd/m2 to provide.Lenticular lens array type optical sheet is used to reduce the thickness of backlight assembly.Each biconvex lens has to the semicircle angular shape of beholder's projection so that the image diffusion is 180 ° the visual angle at center thereby provide with the screen to the beholder.
On the contrary, the optical sheet with rounded prisms array shape makes has about 80cd/m2 to the diffusion backlight of about 750cd/m2 brightness, has extremely about 610cd/m2 brightness backlight of about 580cd/m2 to provide.
Therefore, the optical sheet with rounded prisms array shape has improved the light diffusion rate, and is better than the light diffusion rate of lenticular lens array type optical sheet.
Figure 11 shows the stereographic map of optical sheet according to an embodiment of the invention, and Figure 12 shows the cut-open view of the optical sheet among Figure 11, and Figure 13 is the amplification view of ' B ' part among Figure 12, shows the light diffusion operation of a prism in the array.
With reference to Figure 11 to Figure 13, the optical sheet 30 of this embodiment comprises planar substrates 32, lens 34 and UV restraining barrier 36.
When optical sheet 30 be used for when optical sheet 30 provides distance between the light source of light to be 6.5mm, the interior angle θ of recess and depth H are respectively about 112 ° and about 0.2R.
Preferably, these prisms can form thick and fast.
On the bottom surface of planar substrates 32, form UV restraining barrier 36.The UV restraining barrier has stopped provides the light that has the higher-energy wavelength to all light of the bottom surface of planar substrates 32, injects planar substrates 32 to prevent the light with higher-energy wavelength.Particularly, when planar substrates 32 comprises polycarbonate-based resin (PC), need to form UV restraining barrier 36.
With reference to Figure 13, incide the perimeter of each prism of route guidance backlight of recess.On the contrary, incide the central area of another another each prism of route guidance backlight of rake.
Figure 14 shows the cut-open view of optical sheet according to an embodiment of the invention.The optical sheet of present embodiment comprise except scattering particle with Figure 11 and Figure 12 in the essentially identical element of element.Therefore, be denoted by like references components identical, for simplicity's sake, omit further specifying of relevant similar elements.
With reference to Figure 14, the optical sheet 40 of this embodiment comprises planar substrates 32, lens 34 and scattering particle 46.
In planar substrates 32 and lens 34, form scattering particle 46.Alternatively, can in planar substrates 32 or lens 34, form scattering particle.
In this embodiment, the rake of the prism among Figure 14 and recess between the intersection region be wedge-type shape.Alternatively, in order to be easy to form this prism, the rake and the intersection region between the recess of prism also can be rounded shapes.
Figure 15 shows the cut-open view of the light diffusion operation of a prism in the optical sheet of Figure 14.
With reference to Figure 15, incide the perimeter of each prism of route guidance backlight of recess.On the contrary, incide the central area of each prism of route guidance backlight of rake.And, incide the perimeter of route guidance prism backlight of the rake of prism and the intersection region between recess or the central area of prism.
Figure 16 shows the cut-open view of the shown optical effect that goes out of the rounded prisms of the optical sheet among Figure 11.
With reference to Figure 16, after the rake of injecting prism backlight with pulse, backlight by the sloping portion diffusion to produce first diffused light.First diffused light has the single peak value that is lower than backlight pulse.Yet, because the rake and the distance between the light source of prism are shorter with respect to the distance between prism top and the light source, so only utilize the incline structure of prism can not obtain desired light diffusion effect (that is, not producing the bright line and the concealed wire of light source).
After the recess of injecting prism backlight, the recess diffusion by prism backlight is to produce second diffused light.Second diffused light has two peak values, and it is lower than the peak value of the backlight pulse and first diffused light.Yet, owing to the diffusion on both direction backlight that the top caused, so in optical sheet, can produce bright line and concealed wire by prism.
Therefore, when the light and the light of the recess of injecting prism of the rake of injecting prism are overlapping, can obtain the expectation light that wide brightness is scattered.
As mentioned above, the inclined-plane of prism has remedied the above-mentioned deficiency that recess caused by prism.And the recess of prism has remedied the above-mentioned deficiency that the inclined-plane caused by prism.
Below, detailed description is had the manufacture method of the optical sheet of rounded prisms.
Figure 17 A shows the cut-open view of the manufacture method of optical sheet shown in Figure 11 to Figure 17 E.
With reference to Figure 17 A, the bottom substrate SUB that will have about 1mm thickness is placed on the pedestal STG.The example of bottom substrate SUB comprises the metal such as fine copper, brass, al and ni etc.Utilize the surface of the diamond tool processing bottom substrate SUB of flat shape.
With reference to Figure 17 B, the roller ROL with tooth rotates along the surface treated of bottom substrate SUB, with the surface of tooth extruding bottom substrate SUB, forms groove with the surface at bottom substrate SUB simultaneously.Here, the part of projection is extended along the axial direction of roller ROL between the groove.The span of projection, height and radius and concave depth basically with Figure 11 to Figure 13 in identical.Alternatively, can use diamond head to replace roller ROL to form groove.Groove defines the rounded prisms of the optical sheet with rounded prisms array shape.
With reference to Figure 17 C, the molten metal layer (not shown) is coated on the surface of bottom substrate SUB.By casting iron craft molten metal layer is solidified to form father's mould (FS).Father's mould FS has the opposite basically shape of shape with the bottom substrate SUB with groove.
With reference to Figure 17 D, the molten metal layer (not shown) is coated on father's mould FS.Make molten metal layer solidify the submodule DS that has the shape opposite with formation by casting iron craft with the shape of father's mould.Here, be used to form in the pressing mold of the optical sheet that comprises prism, make a plurality of optical sheets, can utilize these pressing molds to make optical sheet by single step in order to utilize these pressing molds with spill top in manufacturing.
Here, when utilizing bottom substrate SUB to make pressing mold, the part of the bottom substrate SUB that contacts with pressing mold is worn, and makes that the shape of the optical sheet that the bottom substrate utilize these wearing and tearing forms is undesirable.Therefore, in this embodiment, utilize the molded submodule of making of father.Then, utilize the submodule manufacturing to have the optical sheet of rounded prisms array shape.
As mentioned above, make optical sheet in order to utilize two pressing molds, father's mould FS must have substantially the same shape with optical sheet, and bottom substrate SUB must have substantially the same shape with submodule DS.Therefore, the shape of father's mould FS and optical sheet is opposite.
With reference to Figure 17 E, be filled with the resin RSN of UV sclerosis in the groove of submodule DS.Planar substrates 32 is placed on the submodule DS.Here, the resin RSN of UV sclerosis can have the refractive index substantially the same with planar substrates 32.
Make the UV irradiate light to planar substrates 32, use the marginal portion of bar POL pressure planes substrate 32 simultaneously,, thereby make the optical sheet that comprises prism with Figure 11 to Figure 13 middle concave top so that the resin RSN of UV sclerosis is attached on the planar substrates 32.
Figure 18 shows the cut-open view of the backlight assembly with optical sheet shown in Figure 11.
With reference to Figure 18, the backlight assembly 150 of this embodiment comprises and is used for radiative flat florescent lamp 110 and optical sheet 170 that it is arranged on the flat florescent lamp 110, is used to improve the uniformity of light of sending from flat florescent lamp 110, and makes upwards irradiation of light.Described flat florescent lamp 110 with reference to Fig. 9, for brevity, omitted further specifying here about flat florescent lamp 110.
As shown in figure 18, optical sheet 170 comprises planar substrates 172 and a plurality ofly has a prism with spill top 174 that is formed on the planar substrates 172.Optical sheet 170 has heat resistance.Here, be spaced apart about 6.5mm between flat florescent lamp 110 and the optical sheet 170.
In the residing zone of discharge space L30, send relatively large light.On the contrary, be not provided with in the zone of discharge space and send more a spot of light.So, in sending the zone of relatively large light, produce bright line.On the other hand, in the zone of sending, produce details in a play not acted out on stage, but told through dialogues than a little light.
Yet, strengthened diffusion of light according to prism optical sheet 170 of the present invention, that have the spill top.So, can suppress the bright line on the optical sheet 170 and the generation of details in a play not acted out on stage, but told through dialogues.And, can reduce the luminance difference between bright line and the details in a play not acted out on stage, but told through dialogues.
In this embodiment, in having the backlight assembly of flat florescent lamp, used the optical sheet of prism array shape with spill top.Alternatively, for the person skilled in art, obviously can and have the optical sheet that use has the prism array shape on spill top in the backlight assembly etc. of a plurality of light emitting diodes at direct illumination type backlight assembly.
Figure 19 show by will comprise have the spill top the optical sheet of prism array shape be applied to the optical analysis result's that flat florescent lamp obtains curve map.
With reference to Figure 19, the conventional optical sheet of lenticular lens array type makes has about 80cd/m
2To about 750cd/m
2The diffusion backlight of brightness has about 520cd/m to provide
2To about 680cd/m
2Brightness backlight.Lenticular lens array type optical sheet is used to reduce the thickness of backlight assembly.Each biconvex lens has to the semicircle angular shape of beholder's projection so that the image diffusion is 180 ° the visual angle at center thereby provide with the screen to the beholder.
On the contrary, the optical sheet with rounded prisms array shape makes and has about 80cd/m
2To about 750cd/m
2The diffusion backlight of brightness has about 580cd/m to provide
2To about 610cd/m
2Brightness backlight.This optical sheet is referred to as Jonathan's lens array plate (Jonathan lensarray plate).
Therefore, the optical sheet with rounded prisms array shape has improved the light diffusion rate, and is better than the light diffusion rate of lenticular lens array type optical sheet.
Figure 20 shows the exploded perspective view of liquid crystal display (LCD) device according to embodiment.
With reference to Figure 20, the LCD device of this embodiment comprises shell 210, flat florescent lamp 220, transverter 230 and display unit 300.
Shell 210 has the spatial accommodation that is used to hold flat florescent lamp 220.
Flat florescent lamp 220 comprises: have the lamp body of a plurality of discharge spaces, be used for luminous; With the vertical substantially direction of discharge space longitudinal direction on be formed on the outer electrode at the two ends of lamp body; And with the lamp body combination and auxiliary electrode that link to each other with outer electrode.
Particularly, lamp body has be the shape of rectangle on vertical view, to send planar light.When transverter 230 is applied to sparking voltage on the outer electrode, in the discharge space of lamp body, produce plasma discharge, to produce the UV ray.The UV ray is converted to visible light.Visible light sends from lamp body.
Here, lamp body has wide light-emitting area.Therefore, in order to improve luminescence efficiency and brightness uniformity, the inner space in the lamp body is divided into a plurality of discharge spaces.Lamp body comprises first substrate and second substrate.First and second substrates mutually combine to form discharge space.
Transverter 230 produces and is used for from the luminous sparking voltage of flat florescent lamp 220.
LCD panel 310 comprises: first substrate 312; Second relative with first substrate and the combine substrate 314 with first substrate; And the layer of the liquid crystal (LC) between first substrate 312 and second substrate 314 316.
First substrate 312 is corresponding to thin film transistor (TFT) (TFT) substrate, is arranged on this thin film transistor base plate with matrix form as the TFT of on-off element.For example, first substrate 312 comprises glass.TFT comprises: the source terminal that is electrically connected with data line, the gate terminal that is electrically connected with gate line, and the drain electrode end that is electrically connected with the pixel electrode (not shown) that comprises transparent conductive material.
Second substrate 314 is corresponding to filter substrate, and the rgb pixel that is used to form color is arranged on this filter substrate with form of film.For example, second substrate 314 comprises glass.On second substrate 314, form the public electrode (not shown) that comprises transparent conductive material.
When the gate terminal to TFT powered up, TFT was unlocked, so that produce electric field between pixel electrode and public electrode.Electric field has changed the arrangement of the LC molecule in the LC layer 316 between first substrate 312 and second substrate 314.The optical transmission rate that is provided by flat florescent lamp 220 changes according to the permutations of LC molecule, has the image of desired color level with demonstration.
Driving circuit 320 comprises: the data pcb (PCB) 322 that is used for providing to LCD panel 310 data drive signal, be used for providing the grid PCB 324 of gate drive signal to LCD panel 310, data flexible printed circuit board (FPC) 326, and be connected grid FPC 328 between grid PCB 324 and the LCD panel 310.For example, data FPC 326 and grid FPC 328 comprise that band carries encapsulation (TCP) and membrane of flip chip (chip-on-film) (COF) etc.
By making data FPC 326 bendings, data PCB 322 is arranged in the side or the back side of shell 210.By making grid FPC 328 bendings, grid PCB 324 is arranged in the side or the back side of shell 210.Alternatively, when LCD panel 310 and grid FPC 328 are provided with independent signal wire, can save grid PCB 324.
The LCD device can further comprise the optical sheet 250 that is positioned on the flat florescent lamp 220.Optical sheet 250 makes the light diffusion of sending from flat florescent lamp 220 to improve the homogeneity of luminance brightness.Optical sheet 250 has the plate shape that comprises rounded prisms array shape.Optical sheet 250 separates with flat florescent lamp 220.Optical sheet 250 comprises the transparent material that allows light to pass optical sheet 250.Optical sheet 250 can further comprise the light diffusing agent (light-diffusing agent) that is used for diffused light.An example of optical sheet 250 comprises PMMA.
The LCD device can further comprise the middle mould (middle mold) 240 that is arranged between flat florescent lamp 220 and the optical sheet 250.With middle mould 240 and shell 210 assemblings, make flat florescent lamp 220 simultaneously between middle mould 240 and shell 210, with fixed pan fluorescent light 220.The edge of middle mould 240 fastening flat florescent lamps 220 is provided with non-luminous zone of outer electrode with covering.In addition, the edge of middle mould 240 support of optical plates 250.For example, middle mould 240 has the rectangular shaped rim that forms single integral body.Alternatively, middle mould 240 can comprise first parts (piece) with U-shaped shape and second parts with I shape shape or two parts with shape.In addition, middle mould 240 can comprise four parts with I shape shape.
Here, middle mould 240 can comprise and have the plastics that are not less than about 20W/mK pyroconductivity (below, be called the thermal diffusivity plastics).For example, the thermal diffusivity plastics example comprises CoolPoly (by the ProductName of CoolPolymers company manufacturing).CoolPoly is a kind of heat-conducting plastic with about 10W/mK to about 100W/mK pyroconductivity.Here, W, m and K represent watt, rice and Kelvin respectively.
The LCD device can further comprise top mould 260.Top mould 260 is arranged between optical sheet 250 and the LCD panel 310.The edge of top mould 260 fastening optical sheets 250, and the edge of support LCD panel 310.Top mould 260 has and middle mould 240 essentially identical shapes.Therefore, top mould 260 can have rectangular shaped rim, two parts that are respectively U-shaped and I shape, two L shaped parts or four the I shape parts that form single integral body.
The LCD device can further comprise the bolster 270 between shell 210 and flat florescent lamp 220.Bolster 270 supporting plane fluorescent lights 220.Bolster 270 is along the edge placement of flat florescent lamp 220.Therefore, because bolster 270 makes to form the slit between flat florescent lamp 220 and container 210, to prevent electrically contacting between flat florescent lamp 220 and the shell 210.In order to make bolster 270 have above-mentioned functions, bolster 270 comprises insulating material.And in order to absorb the impact that is applied to the LCD device, bolster 270 can have resilient material.
For example, bolster 270 comprises silicones.And bolster 270 comprises two parts with U-shaped.
Alternatively, bolster 270 can comprise four corresponding parts in angle of four corresponding parts of the four edges with flat florescent lamp 220, four and flat florescent lamp 220 or as the frame of single integral body.
The LCD device can further comprise the top frame 280 that is used for fastening display unit 300.Top frame 280 combines with the edge of fastening LCD panel 310 with shell 210.Here, utilize data FPC 326 to make data PCB 322 bendings, then, make data PCB322 be fixed to the side or the bottom surface of shell 210.An example of top frame 280 comprises the metal with high strength and good anti-deformation behavior.
Figure 21 shows the exploded perspective view of LCD device according to an embodiment of the invention.
With reference to Figure 21, the LCD device of this embodiment comprises display unit 400, is positioned at the shell 580 the backlight assembly 500 of light to be provided and to be used to hold display unit 400 and backlight assembly 500 to display unit 400 under the display unit 400.
First substrate is corresponding to transparent glass substrate, as the TFT of on-off element with matrix arrangement on this transparent glass substrate.TFT comprises the source terminal that is electrically connected with data line, the gate terminal that is electrically connected with gate line and the drain electrode end that is electrically connected with the pixel electrode that comprises transparent conductive material.
Second substrate and first substrate are relatively arranged.Second substrate forms rgb pixel that technology be formed for form color by film corresponding to filter substrate on this filter substrate.On second substrate, form the public electrode that comprises phosphide tin compound.
When the gate terminal to TFT powered up, TFT was unlocked, so that produce electric field between pixel electrode and the public electrode.The arrangement of the LC molecule in the LC layer of electric field change between first substrate and second substrate.The optical transmission rate changes according to the permutations of LC molecule, has the image of expectation gray scale (gradation) with demonstration.
In this exemplary embodiments, lamp assembly 510 comprises the strip light 511 that is arranged in parallel.Alternatively, can in lamp assembly 510, use lamp with U-shaped shape.And, the reflecting plate (not shown) can be arranged under the lamp assembly 510.
In addition, the example of lamp 511 comprises cold-cathode fluorescence lamp with internal electrode, outer electrode lamp etc.Alternatively, can use LED to replace lamp assembly 510 as light source.
Transverter 570 is applied to drive signal on the lamp assembly 510.Transverter 570 can comprise PCB.Transverter lid 572 comprises the metal of the electromagnetic interference radiation that is used to prevent that transverter 570 looks from producing.
Lamp holder 520 is around the electrode of lamp 511.Lamp holder 520 combines with shell 580 to prevent that lamp 511 from moving.For by lamp holder 520 package shells 580 and reflector plate 545, form the fixed orifice that passes shell 580 and reflector plate 545.
Reflector plate 545 is positioned under the lamp assembly 510.Reflector plate 545 will be reflexed to LCD panel 410 by the light that lamp assembly 510 sends.The hole 584 corresponding to lamp holder 520 of reflector plate 545 is passed in formation.
Lamp fixation kit 530 fixed lights 511 are so that lamp 511 has uniform interval.Lamp fixture 530 can further comprise and is used for support of optical plate 540 so that the support section in gap to be provided to optical sheet 540 and lamp assembly 510.The hole 584 that lamp fixture 530 passes reflector plate 545 combines with shell 580.
Optical sheet 540 is arranged on the first limit mould 550 and the second limit mould 560.At least one comprises the fixed part 553 that prevents movable part 552 and be used for fixing optical sheet 540 that is used to prevent that optical sheet 540 from moving in the first limit mould 550 and the second limit mould 560.Here, an example of the first limit mould 550 and the second limit mould 560 comprises having the thermal diffusivity plastics that are not less than about 20W/mK pyroconductivity.
The heat that produces in lamp assembly 510 passes to the first limit mould 550 and the second limit mould 560.Hot joining in the first limit mould 550 and the second limit mould 560 and is passed to shell 580.
The light that optical sheet 540 diffusions and propagation lamp assembly 510 send.
Middle mould 590 combines with shell 580, moves to prevent optical sheet 540.Display panel 410 is positioned on the middle mould 590.Middle mould 590 further comprises the panel guiding piece 592 of the assembling position that is used to guide display panel 410.Panel guiding piece 592 can comprise the resilient material such as rubber.Alternatively, panel guiding piece 592 can form with middle mould 590 integral body.Panel guiding piece 592 can be positioned on the turning of middle mould 590.
Shell 580 has bottom surface and the side that is used to limit spatial accommodation.This spatial accommodation accommodates display panel 410 and backlight assembly 500.Shell 580 can comprise metal.
Figure 22 shows the exploded perspective view of LCD device according to an embodiment of the invention.
With reference to Figure 22, the LCD device of this embodiment comprises shell 600, light-emitting device 700 and display unit 800.
Be used on the bottom surface 610 that luminous light-emitting device 700 is positioned at shell 600.For luminous equably in wide scope, a plurality of light-emitting devices 700 are arranged on the bottom surface 610 of shell 600.In addition, light-emitting device 700 is arranged parallel to each other, and the identical distance of each interval.Here, be arranged between the adjacent light-emitting device 700 in the zigzag mode at the pointolite element 720 on the circuit substrate 710.That is, between two pointolite elements 720 of pointolite element 720 in adjacent light-emitting device 700 in light-emitting device 700.
Alternatively, light-emitting device 700 can have the structure of the pointolite element 720 that being included in embarks on journey on the single circuit substrate 710 arranges.In addition, circuit substrate 710 can be arranged in the outside of shell 600, and can only pointolite element 720 be installed in the shell 600.
When the gate terminal to TFT powers up, open TFT so that between pixel electrode and public electrode, produce electric field.The arrangement of the LC molecule in the LC layer (not shown) of electric field change between first substrate 812 and second substrate 814.The optical transmission rate that is provided by light-emitting device 700 changes according to the permutations of LC molecule, has the expectation image gray with demonstration.
Driving circuit 820 comprise be used for to LCD panel 810 provide data drive signal data PCB 821, be used for to LCD panel 810 grid PCB822, the data FPC 823 of gate drive signal is provided and be connected grid PCB 822 and LCD panel 810 between grid FPC 824.For example, data FPC 823 and grid FPC 824 comprise that band carries encapsulation (TCP) and membrane of flip chip (COF) etc.Alternatively, when LCD panel 810 and grid FPC 824 are provided with independent signal wire, can save grid PCB 822.
The LCD device of this embodiment further comprises and is used to produce the power supply 910 that is applied on the light-emitting device 700 with luminous driving voltage.By cable 912 driving voltage that power supply 910 produces is applied on the light-emitting device 700.
The LCD device can further comprise the light guide plate 920 that is positioned on the light-emitting device 700.Light guide plate 920 separates with light-emitting device 700.Red light, blue light and the green light that light guide plate 920 produces light-emitting device 700 mixed with the emission white light.An example of light guide plate 920 comprises PMMA.
The LCD device can further comprise the optical element 930 that is positioned on the light guide plate 920.For mixture of red coloured light, blue light and green light fully, optical element 930 separates with light guide plate 920.Optical element 930 comprises the optical sheet 932 that is used for the light that diffusion light guide plate 920 sends and is arranged on optical sheet 934 on the optical sheet 932.
The light that optical sheet 932 diffusion light guide plate 920 are sent is to improve the homogeneity of luminance brightness.Optical sheet 932 can have writing board shape.An example of optical sheet 923 comprises PMMA.And optical sheet 923 can include and be beneficial to light diffusing diffusion agent.
The LCD device can further comprise the optical sheet that has according to the difference in functionality of desired brightness.
According to the present invention, form convex lens array at the light emergence face of optical sheet with rounded prisms shape.The scattering of convex lens array improving optical efficiency, and suppresses the generation of details in a play not acted out on stage, but told through dialogues and bright line from the light at the back side of optical sheet.
In addition, form the convex lens of prism shape with spill top at the light emergence face of optical sheet.The scattering of spill top to improve optical efficiency, suppresses the generation of details in a play not acted out on stage, but told through dialogues and bright line from the light at the back side of optical sheet simultaneously.
In addition, can by by efficiently, the light beam splitting that obtains of optimum structure shortens the distance between light source and the optical sheet, so that backlight assembly and LCD device have the thickness that reduces.Described embodiments of the invention and advantage thereof, should be noted that here and can carry out substitutions and modifications, and do not broken away from by the additional the spirit and scope of the present invention that claim limited.
Claims (43)
1. optical sheet, it comprises:
Planar substrates; And
A plurality of rounded prisms are formed on the surface of described planar substrates.
2. optical sheet according to claim 1, wherein, each described prism comprises:
The rounded apex part, with first diffused light that is diffused into backlight, described first diffused light has the single peak value that is lower than described peak value backlight; And
Two sloping portions, it is connected to described rounded apex part, and with second diffused light that is diffused into backlight, described second diffused light has two peak values, and it is lower than described two peak values backlight and the described peak value of described first diffused light.
3. optical sheet according to claim 1, wherein, described planar substrates have with described a plurality of rounded prisms in each the essentially identical refractive index of refractive index.
4. optical sheet according to claim 1, wherein, described planar substrates has the thickness of about 1mm to about 3mm.
5. optical sheet according to claim 1, wherein, each in described a plurality of rounded prisms has with about 43 ° of side surfaces that form to about 47 ° of oblique angles.
6. optical sheet according to claim 1, wherein, each in described a plurality of rounded prisms comprises having the top that becomes the radius-of-curvature of predetermined ratio with the bottom lengths of described prism.
7. optical sheet according to claim 1, wherein, each in described a plurality of rounded prisms has the bottom lengths of about 50 μ m to about 200 μ m.
8. optical sheet according to claim 1, wherein, each in described a plurality of rounded prisms comprises having the top of about 15 μ m to the radius-of-curvature of about 76 μ m.
9. optical sheet according to claim 1, wherein, described a plurality of rounded prisms in each bottom lengths and the ratio between the radius-of-curvature of rounded apex be about 100: 30 to about 100: 38.
10. optical sheet according to claim 1, wherein, each in described a plurality of rounded prisms is arranged adjacent to each other.
11. optical sheet according to claim 1, wherein, each in described a plurality of rounded prisms has the height of about 50 μ m.
12. optical sheet according to claim 1 further comprises the UV restraining barrier, it is formed under the back side of described planar substrates, provides the light that has the high-energy wavelength to the light at the described back side of described planar substrates to stop.
13. optical sheet according to claim 1 comprises that further UV stops particle, it is formed in the described planar substrates, provides the light that has the high-energy wavelength to the light at the described back side of described planar substrates to stop.
14. optical sheet according to claim 1, wherein, described planar substrates comprises light diffusing particles.
15. according to the described optical sheet of claim 1, wherein, each in described a plurality of rounded prisms has the recess on the top that is formed on described prism.
16. optical sheet according to claim 15 wherein, extends on the direction of the bearing of trend of described recess each in being arranged essentially parallel to described a plurality of rounded prisms.
17. optical sheet according to claim 15, wherein, each in described a plurality of rounded prisms has from the outstanding semicircular sectional shape of described planar substrates, and has the radius of about 25 μ m to about 150 μ m.
18. optical sheet according to claim 15, wherein, each in described a plurality of rounded prisms has from the outstanding semicircular sectional shape of described planar substrates, and described recess have about 60 ° to about 160 ° interior angle.
19. optical sheet according to claim 15, wherein, each in described a plurality of rounded prisms has from the outstanding semicircular sectional shape of described planar substrates, and described concave depth is about 0.1 times to about 0.7 times of radius of described semicircle horn shape.
20. optical sheet according to claim 15, wherein, the described a plurality of rounded prisms on the described planar substrates have the span of about 50 μ m to about 300 μ m.
21. optical sheet according to claim 15, wherein, described planar substrates has the thickness of about 1mm to about 3mm.
22. optical sheet according to claim 15, wherein, the refractive index of each in described a plurality of rounded prisms is equal to or higher than the refractive index of described planar substrates substantially.
23. optical sheet according to claim 15 further comprises the UV restraining barrier, it is formed on the back side of described planar substrates, provides the light that has the high-energy wavelength to the light at the described back side of described planar substrates to stop.
24. optical sheet according to claim 15 comprises that further UV stops particle, it is formed in the described planar substrates, provides the light that has the high-energy wavelength to the light at the back side of described planar substrates to stop.
25. optical sheet according to claim 15, wherein, described planar substrates comprises light diffusing particles.
26. optical sheet according to claim 1, wherein, each in described a plurality of rounded prisms comprises the curved surface of two inclinations, and it defines in described a plurality of rounded prisms the recess of each.
27. optical sheet according to claim 1, wherein, each in described a plurality of rounded prisms comprises curved surface and two planes of two inclinations, and described plane defines recess, and the zone between the curved surface of described inclination and the described plane has rounded shapes.
28. a backlight assembly comprises:
Light source cell, emission light; And
Optical sheet comprises planar substrates and the lip-deep a plurality of rounded prisms that are formed at described planar substrates, wherein, is propagated by described optical sheet by the light that described light source sends.
29. backlight assembly according to claim 28, wherein, described optical sheet has heat-resistant quality.
30. backlight assembly according to claim 28, wherein, described light source cell comprises the planar light source unit, and the upper surface of described optical sheet and described planar light source unit is not less than about 6.5mm at interval.
31. backlight assembly according to claim 28, wherein, described light source cell comprises a plurality of lamps, and described optical sheet and described lamp are not less than about 6.5mm at interval.
32. backlight assembly according to claim 28, wherein, described a plurality of rounded prisms are extended on the direction of the orientation of the light-emitting component that is arranged essentially parallel to described light source cell.
33. backlight assembly according to claim 28, wherein, described a plurality of rounded prisms in each bottom lengths and the ratio between the radius-of-curvature of rounded apex be about 100: 30 to about 100: 38.
34. backlight assembly according to claim 28, wherein, each in described a plurality of prisms comprises the recess on the top that is formed on each prism.
35. backlight assembly according to claim 34 wherein, extends on the direction of the bearing of trend of described recess each in being arranged essentially parallel to described a plurality of rounded prisms.
36. backlight assembly according to claim 34, wherein, each in described a plurality of rounded prisms comprises the curved surface of two inclinations, and it limits in described a plurality of rounded prisms the recess of each.
37. backlight assembly according to claim 34, wherein, each in described a plurality of rounded prisms comprises curved surface and two planes of two inclinations, and described plane limits recess, and the zone between the curved surface of described inclination and the described plane has rounded shapes.
38. a display device comprises:
Display panel utilizes light display image;
Light source cell is arranged under the described display panel, with emission light; And
Optical sheet, comprise planar substrates and a plurality of lip-deep rounded prisms that is formed at described planar substrates, described a plurality of rounded prisms is arranged to respect to described light source cell, improving the uniformity of light of sending by described light source cell, and make to have and improved inhomogeneity described illumination and be mapped on the described display panel.
39. according to the described display device of claim 38, wherein, described light source cell comprises the flat florescent lamp towards the back side of described display panel.
40. according to the described display device of claim 38, wherein, described light source cell comprises the lamp at a plurality of back sides towards described display panel.
41., further comprise the reflecting plate that is arranged under described a plurality of lamp according to the described display device of claim 40.
42. according to the described display device of claim 38, wherein, described planar substrates is transparent.
43. according to the described display device of claim 38, wherein, described optical sheet further comprises: lens array sheet, it has a plurality of rounded prisms that are formed with bossing on it; And the bonding agent between described planar substrates and described lens array sheet.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020050042266A KR20060119342A (en) | 2005-05-20 | 2005-05-20 | Optical plate, and backlight assembly and display device having the same |
| KR10-2005-0042266 | 2005-05-20 | ||
| KR1020050042266 | 2005-05-20 | ||
| KR1020050127158 | 2005-12-21 | ||
| KR10-2005-0127158 | 2005-12-21 | ||
| KR1020050127158A KR101229883B1 (en) | 2005-12-21 | 2005-12-21 | Optical plate and backlight assembly and display device having the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1866057A true CN1866057A (en) | 2006-11-22 |
| CN1866057B CN1866057B (en) | 2010-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100782875A Expired - Fee Related CN1866057B (en) | 2005-05-20 | 2006-05-22 | Optical plate, backlight assembly and display device having the optical plate |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR20060119342A (en) |
| CN (1) | CN1866057B (en) |
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| CN101382605B (en) * | 2007-09-07 | 2010-06-23 | 迎辉科技股份有限公司 | Optical film, method for manufacturing optical film and optical film mold device |
| CN101826436A (en) * | 2010-03-30 | 2010-09-08 | 上海信洁照明科技有限公司 | Flat fluorescent lamp |
| CN101749606B (en) * | 2010-01-25 | 2011-11-09 | 友达光电股份有限公司 | Backlight module avoiding warping of membrane |
| CN101295039B (en) * | 2007-04-27 | 2012-02-01 | 鸿富锦精密工业（深圳）有限公司 | Back light module and optical plate |
| CN102466829A (en) * | 2010-11-11 | 2012-05-23 | 株式会社常宝 | Optical sheet with a plurality of curvatures |
| TWI391755B (en) * | 2009-12-30 | 2013-04-01 | Au Optronics Corp | Backlight module for preventing films from waving or curving |
| CN104791665A (en) * | 2015-04-23 | 2015-07-22 | 京东方科技集团股份有限公司 | Backlight module, display device and diffusion plate |
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| KR101282289B1 (en) * | 2008-02-28 | 2013-07-10 | 엘지디스플레이 주식회사 | Lamp guide and backlight unit for LCD including the same |
| KR100980496B1 (en) * | 2008-11-24 | 2010-09-07 | 주식회사 엘엠에스 | Combination sheet for improving hot spot and back light unit using the same |
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| JP3669299B2 (en) * | 2001-07-12 | 2005-07-06 | 住友化学株式会社 | Methyl methacrylate resin composition and molded article thereof |
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2005
- 2005-05-20 KR KR1020050042266A patent/KR20060119342A/en not_active Application Discontinuation
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2006
- 2006-05-22 CN CN2006100782875A patent/CN1866057B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101295039B (en) * | 2007-04-27 | 2012-02-01 | 鸿富锦精密工业（深圳）有限公司 | Back light module and optical plate |
| CN101382605B (en) * | 2007-09-07 | 2010-06-23 | 迎辉科技股份有限公司 | Optical film, method for manufacturing optical film and optical film mold device |
| TWI391755B (en) * | 2009-12-30 | 2013-04-01 | Au Optronics Corp | Backlight module for preventing films from waving or curving |
| CN101749606B (en) * | 2010-01-25 | 2011-11-09 | 友达光电股份有限公司 | Backlight module avoiding warping of membrane |
| CN101826436A (en) * | 2010-03-30 | 2010-09-08 | 上海信洁照明科技有限公司 | Flat fluorescent lamp |
| CN102466829A (en) * | 2010-11-11 | 2012-05-23 | 株式会社常宝 | Optical sheet with a plurality of curvatures |
| CN104791665A (en) * | 2015-04-23 | 2015-07-22 | 京东方科技集团股份有限公司 | Backlight module, display device and diffusion plate |
| CN104791665B (en) * | 2015-04-23 | 2017-05-10 | 京东方科技集团股份有限公司 | Backlight module, display device and diffusion plate |
| CN110268311A (en) * | 2017-01-04 | 2019-09-20 | 3M创新有限公司 | For enhancing the light control film with turning film and the even mating plate of lenticular of view in a horizontal plane |
| CN108831312A (en) * | 2018-03-29 | 2018-11-16 | 友达光电股份有限公司 | Display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1866057B (en) | 2010-11-10 |
| KR20060119342A (en) | 2006-11-24 |
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