CN104977756A - Method for avoiding cross-hatching phenomenon of direct type LED backlight LCD TV - Google Patents
Method for avoiding cross-hatching phenomenon of direct type LED backlight LCD TV Download PDFInfo
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- CN104977756A CN104977756A CN201510296926.4A CN201510296926A CN104977756A CN 104977756 A CN104977756 A CN 104977756A CN 201510296926 A CN201510296926 A CN 201510296926A CN 104977756 A CN104977756 A CN 104977756A
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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
- G02F1/133603—Direct backlight with LEDs
-
- 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
- G02F1/133305—Flexible substrates, e.g. plastics, organic film
-
- 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
- G02F1/133608—Direct backlight including particular frames or supporting means
-
- 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
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/64—Constructional details of receivers, e.g. cabinets or dust covers
- H04N5/655—Construction or mounting of chassis, e.g. for varying the elevation of the tube
-
- 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
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
- G02F1/133322—Mechanical guidance or alignment of LCD panel support components
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Abstract
The invention provides a method for avoiding the cross-hatching phenomenon of a direct type LED backlight LCD TV. According to the method, a supporting rod used for supporting an LCD panel inside the direct type LED backlight LCD TV is designed to be of a cube structure, the supporting rod is made of transparent materials, and the supporting rod is placed at the central position of the linear space of two LED lamp beads in the horizontal direction or the vertical direction; if the space between the lamp beads in the horizontal direction is small, the supporting rod is placed at the central position of the two lamp beads in the vertical direction; if the space between the lamp beads in the vertical direction is small, the supporting rod is placed at the central position of the two lamp beads in the horizontal direction; the surface of the supporting rod is opposite to the two lamp beads on the two sides on the plane. Once it is determined that the supporting rod is placed in the horizontal direction or the vertical direction, due to the fact that the supporting rod is far away from the two lamp beads in the other two directions, the shielding function of the supporting rod on light is weak, even though shielding exists, the shielding area is small, and the cross-hatching influence is small.
Description
Technical field
The present invention relates to lcd technology, be specifically related to a kind of method improving direct-light type LED backlight LCD TV fork shadow phenomenon.
Background technology
Current, adopt the televisor of lcd technology or display to occupy the leading position of flat panel display product.LCD Panel belongs between passive light emission period, needs to rely on backlight ability display image content.The presentation mode of LCD backlight is divided into straight-down negative and side entering type two kinds.Because LED exists the advantage of the aspect such as energy-saving and environmental protection, life-span length, present liquid crystal display product has all used LED as backlight.Straight-down negative and side entering type two kinds of LED-backlit modes are compared, except on screen thickness straight-down negative thinner not as side entering type except, straight-down negative has that the cost of material is low and the advantage of rapid heat dissipation.Therefore, use direct-light type LED backlight is the development trend in liquid crystal display product future.
Direct-light type LED backlight assembly displaying principle as shown in Figure 1.Comprise liquid crystal panel 1, blooming piece 2, diffusion sheet 3, reflector plate 4, LED lamp bead 5, backlight assembly shell 6.Accompanying drawing 2 is certain type product straight-down negative lamp bar distribution plan.In downward back photo structure, LED light source is positioned at the bottom of backlight cavity, upwards bright dipping together with the reflex of reflector plate, mixed light is carried out again through certain space distance, bright dipping after finally being modulated by blooming pieces such as diffuser plates, therefore the thickness of each optical module and the space light mixing distance needed for LED determine the integral thickness of backlight cavity.Usually this cavity is thicker, and the optical uniformity of backlight just can be done better.Here it is, and direct-type backlight cavity is not so good as the thin main cause of side entering type.
In order to ensure to reach certain light mixing distance, direct-type backlight cavity major part is empty.After the superiors at this cavity add the liquid crystal panel of the glass baseplate of very thin thickness, need between the diffuser plate and backlight assembly bottom enclosure of backlight inside cavity, increase several support bars and cause liquid crystal panel to break to prevent producing vibrations in transportation.Particularly in the above size of 32 inch in big screen LCD or televisor, if do not adopt strutting means, due to reasons such as liquid crystal panel own wt and thickness, also easily there is buckling deformation in screen, therefore must use support bar.Support bar generally adopts upper and lower isodiametric right cylinder or up-thin-low-thick cone shape now.But, after increase support bar in direct-light type LED backlight cavity, because support bar is on the impact of light path, just there will be fork shadow phenomenon.It is discontented that this phenomenon can make user produce image quality.
Solve the fork shadow problem of direct-light type LED backlight LCD TV or display, first will analyze the reason producing fork shadow phenomenon.We know, light source carries out radiation in the mode of direct projection to surrounding, and running into opaque object will be blocked.So, in direct-light type LED backlight cavity, the reason producing fork shadow can be showed by accompanying drawing 3.The light sent in the LED lamp bead of backlight cavity bottom has part to be sheltered from by the upper semisection of support bar, and the part be blocked can produce projection on diffuser plate.In accompanying drawing 3, because each support bar can shelter from LED lamp bead (a, b from 4 directions, c, d) emission of light, diffuser plate produces 4 sections of projections (o ' a ', o ' b ', o ' c ', o ' d '), so, fork-shaped lamp shadow will have been there is on diffuser plate.
Can such as transparent acrylic (PMMA is commonly called as organic glass) eliminate fork shadow phenomenon if support bar is changed into the material of optical-grade transparent? answer is negative.We mentioned above, and what current support bar adopted is right cylinder or cone.After light injects these support bars, because the plane of incidence of support bar and outgoing plane can be similar to the lens regarding spirogyrate as, the convex lens light path principle schematic diagram shown from accompanying drawing 4 we, after transparent cylinder or cone support bar, optical path direction can change, and diffuser plate still has projection and occurs.So, simply support bar is changed into transparent material and can not solve fork shadow problem.
Summary of the invention
For prior art Problems existing, the invention provides a kind of method improving direct-light type LED backlight LCD TV fork shadow phenomenon, from the angle of optical principle, the support bar profile of direct-light type LED backlight LCD TV backlight inside cavity and putting position thereof are optimized, to improve the fork shadow phenomenon existed in current image frame, reach the subjective level discovered less than fork shadow phenomenon of human eye.
Technical scheme of the present invention is: a kind of method improving direct-light type LED backlight LCD TV fork shadow phenomenon, be cube structure by the profile design being used for the support bar supporting liquid crystal panel at direct-light type LED backlight inside liquid crystal television, material selection transparent material, and support bar is positioned on the center of the rectilineal interval of 2 LED lamp pearls of horizontal direction or vertical direction; If the lamp pearl spacing of horizontal direction is little, support bar is pendulum 2 lamp pearl centre positions in the vertical direction just; If the lamp pearl spacing of vertical direction is little, support bar is pendulum 2 lamp pearl centre positions in the horizontal direction just; And support bar surface is with 2 lamp pearls of the relative both sides of plane.
Further, the shape of described support bar is rectangular structure, and relatively the square planar of 2 the lamp pearls in both sides is the maximum face of area.
Further, interval between described support bar and the diffuser plate of top, spacing distance is less than the scope that liquid crystal panel can bear by maximum distortion warpage after external force.
Further, the material of described support bar is optical grade organic glass.
The present invention also provides a kind of method improving direct-light type LED backlight LCD TV fork shadow phenomenon, by the frustum structure that the profile design being used for the support bar supporting liquid crystal panel at direct-light type LED backlight inside liquid crystal television is 6 bodies, end face and bottom surface are square, 4 sides are symmetrical up-small and down-big trapezoidal between two, material selection transparent material; Described support bar is positioned on the center of the rectilineal interval of 2 LED lamp pearls of horizontal direction or vertical direction; If the lamp pearl spacing of horizontal direction is little, support bar is pendulum 2 lamp pearl centre positions in the vertical direction just; If the lamp pearl spacing of vertical direction is little, support bar is pendulum 2 lamp pearl centre positions in the horizontal direction just; And support bar surface is with 2 lamp pearls of the relative both sides of plane.
Further, the end face of described support bar and bottom surface are rectangular parallelepiped, and relatively the ladder plane of 2 the lamp pearls in both sides is the maximum face of area.
Further, interval between described support bar and the diffuser plate of top, spacing distance is less than the scope that liquid crystal panel can bear by maximum distortion warpage after external force.
Further, the material of described support bar is optical grade organic glass.
The invention has the beneficial effects as follows: in the present invention, support bar is placed in the center of horizontal or vertical direction 2 LED lamp pearl rectilineal interval, needs to determine according to lamp pearl distribution.If the lamp pearl spacing of horizontal direction is little, support bar is pendulum 2 lamp pearl centre positions in the vertical direction just; If the lamp pearl spacing of vertical direction is little, support bar is pendulum 2 lamp pearl centre positions in the horizontal direction just.Once after determining that support bar is placed in the position of horizontal or vertical direction, because support bar is comparatively far away at a distance of 2 lamp pearl positions in other a pair direction, it is more weak that this support bar blocks effect to light, even if block, the area blocked is less, and the impact producing fork shadow is very little.Just can eliminate with such disposing way the impact that 4 corner angle limits shut out the light, improve fork shadow phenomenon problem.
Meanwhile, support bar of the present invention selects transparent material (such as organic glass); The height of suitable reduction support bar; The profile of support bar uses the frustum structure of 6 bodies instead, and reduces the width in support bar front and the thickness of side under the prerequisite ensureing support strength as far as possible.The further support bar that improves blocks effect to light, reduces the area pattern that cube support bar blocks light.
Accompanying drawing explanation
Fig. 1: direct-light type LED backlight assembly displaying principle schematic diagram;
Fig. 2: certain type product straight-down negative lamp bar distribution plan;
Fig. 3: direct LED backlight produces the schematic diagram of fork shadow reason;
Fig. 4: convex lens light path principle schematic diagram;
Fig. 5: light is at intravitreous refraction principle schematic diagram;
Fig. 6: cube supports dry putting position schematic diagram;
Fig. 7: the support bar appearance schematic diagram improved.
Wherein: 1, liquid crystal panel; 2, blooming piece; 3, diffusion sheet; 4, reflector plate; 5, LED lamp bead; 6, backlight assembly shell, 7, steady arm; 8, air; 9, glass.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated.
From Fig. 5 (light is at the intravitreous refraction principle schematic diagram of planar transparent), when light incides flat glass 9 from air, can produce light refraction phenomenon, its incident angle i is greater than refraction angle r; And light injects to air 8 and again can produce refraction in flat glass, its incident angle i ' is less than refraction angle r '.Inject the Vitrea light of planar transparent and will keep the injection of the light path angle before the incidence transparent body, but the final position arrived has deviation, as the distance that A point and A ' in Fig. 5 put.If reduce planar transparent Vitrea thickness, the distance that A point and A ' put can be shortened, minimizing launching position deviation.So, by the cube structure changing surfacing into of the support bar 7 of transparent column (cone) shape, fork shadow phenomenon can be improved.Key how to realize allowing light be smooth through the surface of transparent support bar.So the present invention changes the profile of support bar 7 into cube structure.
If the support bar 7 of cube structure is put according to current position (see Fig. 3), in the middle of geometric position support bar 7 being placed on 4 LED lamp pearls, because cube structure exists 4 corner angle limits, they can not good printing opacity, effect is blocked to light, so it is also well to eliminate fork shadow phenomenon that the profile only changing support bar changes cube structure into.
LED lamp bead 5 is fixing to the radiative angle of surrounding, and support bar and lamp pearl are apart from nearer, and its position shut out the light is more, produces fork shadow more obvious.So readjust by the putting position of support bar, by its pendulum in the horizontal direction or on the center of the rectilineal interval of 2 LED lamp pearls of vertical direction, support bar surface is with plane this 2 LED lamp pearl relatively.Known from the LED backlight pearl distribution plan shown in Fig. 2, the spacing of the LED lamp bead of horizontal direction and vertical direction is different.So support bar to end of swing in the horizontal direction or 2 LEDs rectilineal interval centers of vertical direction, needs the distribution according to often kind of direct-light type LED backlight lamp pearl to determine.If the lamp pearl spacing of horizontal direction is little, support bar is pendulum 2 lamp pearl centre positions in the vertical direction just; If the lamp pearl spacing of vertical direction is little, support bar is pendulum 2 lamp pearl centre positions in the horizontal direction just.The putting position schematic diagram of side's body support bar as shown in Figure 6.
Once after determining that support bar is placed in the position of horizontal or vertical direction, because support bar is comparatively far away at a distance of 2 lamp pearl positions in other a pair direction, it is more weak that this support bar blocks effect to light, even if block, the area blocked is less, and the impact producing fork shadow is very little.Just can eliminate with such disposing way the impact that 4 corner angle limits shut out the light, improve fork shadow phenomenon problem.
In order to improve support bar further effect is blocked to light, can by reducing the area pattern that cube support bar block light.Therefore, also need to be optimized the profile of support bar.
Reducing the measure of support bar to light path shielded area mainly contains following several:
1, the height of support bar is suitably reduced.Retain certain gap by between the top of support bar and diffuser plate, the scope that generally can bear by maximum distortion warpage after external force with liquid crystal panel is limited;
2, reduce the width in support bar front, the rectangle in support bar front is changed into up-small and down-big trapezoidal simultaneously;
3, reduce the thickness of support bar side, the rectangle of support bar side is changed into up-small and down-big trapezoidal simultaneously.
Wherein the profile of support bar is used instead the frustum structure of 6 bodies at the 2nd and the 3rd, and reduce the width in support bar front and the thickness of side as far as possible under the prerequisite ensureing support strength.Not only can reduce shielded area, can also reduce because light occurs to reflect the position deviation produced through transparency material.The support bar appearance schematic diagram improved is shown in Fig. 7.
More than describe the preferred embodiment of the present invention in detail; but the present invention is not limited to the detail in above-mentioned embodiment, within the scope of technical conceive of the present invention; can carry out multiple equivalents to technical scheme of the present invention, these equivalents all belong to protection scope of the present invention.
Claims (8)
1. one kind is improved the method for direct-light type LED backlight LCD TV fork shadow phenomenon, it is characterized in that: be cube structure by the profile design being used for supporting the support bar of liquid crystal panel at direct-light type LED backlight inside liquid crystal television, material selection transparent material, and support bar is positioned on the center of the rectilineal interval of 2 LED lamp pearls of horizontal direction or vertical direction; If the lamp pearl spacing of horizontal direction is little, support bar is pendulum 2 lamp pearl centre positions in the vertical direction just; If the lamp pearl spacing of vertical direction is little, support bar is pendulum 2 lamp pearl centre positions in the horizontal direction just; And support bar surface is with 2 lamp pearls of the relative both sides of plane.
2. a kind of method improving direct-light type LED backlight LCD TV fork shadow phenomenon according to claim 1, is characterized in that: the shape of described support bar is rectangular structure, and the square planar of 2 the lamp pearls in both sides is the maximum face of area relatively.
3. a kind of method improving direct-light type LED backlight LCD TV fork shadow phenomenon according to claim 1, it is characterized in that: interval between described support bar and the diffuser plate of top, spacing distance is less than the scope that liquid crystal panel can bear by maximum distortion warpage after external force.
4. a kind of method improving direct-light type LED backlight LCD TV fork shadow phenomenon according to claim 1, is characterized in that: the material of described support bar is optical grade organic glass.
5. one kind is improved the method for direct-light type LED backlight LCD TV fork shadow phenomenon, it is characterized in that: the frustum structure by the profile design being used for supporting the support bar of liquid crystal panel at direct-light type LED backlight inside liquid crystal television being 6 bodies, end face and bottom surface are square, 4 sides are symmetrical up-small and down-big trapezoidal between two, material selection transparent material; Described support bar is positioned on the center of the rectilineal interval of 2 LED lamp pearls of horizontal direction or vertical direction; If the lamp pearl spacing of horizontal direction is little, support bar is pendulum 2 lamp pearl centre positions in the vertical direction just; If the lamp pearl spacing of vertical direction is little, support bar is pendulum 2 lamp pearl centre positions in the horizontal direction just; And support bar surface is with 2 lamp pearls of the relative both sides of plane.
6. a kind of method improving direct-light type LED backlight LCD TV fork shadow phenomenon according to claim 5, is characterized in that: the end face of described support bar and bottom surface are rectangular parallelepiped, and the ladder plane of 2 the lamp pearls in both sides is the maximum face of area relatively.
7. a kind of method improving direct-light type LED backlight LCD TV fork shadow phenomenon according to claim 5, it is characterized in that: interval between described support bar and the diffuser plate of top, spacing distance is less than the scope that liquid crystal panel can bear by maximum distortion warpage after external force.
8. a kind of method improving direct-light type LED backlight LCD TV fork shadow phenomenon according to claim 5, is characterized in that: the material of described support bar is optical grade organic glass.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510296926.4A CN104977756A (en) | 2015-06-02 | 2015-06-02 | Method for avoiding cross-hatching phenomenon of direct type LED backlight LCD TV |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510296926.4A CN104977756A (en) | 2015-06-02 | 2015-06-02 | Method for avoiding cross-hatching phenomenon of direct type LED backlight LCD TV |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109932841A (en) * | 2019-04-03 | 2019-06-25 | 靖江市永盛光电科技有限公司 | A kind of direct-light-type backlight with optically focused bracket |
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|---|---|---|---|---|
| JP2004264452A (en) * | 2003-02-28 | 2004-09-24 | Fujitsu Kasei Kk | Backlight device |
| CN201107515Y (en) * | 2007-05-14 | 2008-08-27 | 安徽华东光电技术研究所 | High luminance back light source equipment for free stereoscopic display |
| KR20120030909A (en) * | 2010-09-20 | 2012-03-29 | 엘지디스플레이 주식회사 | Backlgiht unit and liquid crystal display device the same |
| CN102767803A (en) * | 2012-07-23 | 2012-11-07 | 冠捷显示科技（厦门）有限公司 | Support pillar of LED (light emitting diode) backlight module |
| CN203586722U (en) * | 2013-12-03 | 2014-05-07 | 江苏设计谷科技有限公司 | Direct type television diffusion plate support structure |
-
2015
- 2015-06-02 CN CN201510296926.4A patent/CN104977756A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004264452A (en) * | 2003-02-28 | 2004-09-24 | Fujitsu Kasei Kk | Backlight device |
| CN201107515Y (en) * | 2007-05-14 | 2008-08-27 | 安徽华东光电技术研究所 | High luminance back light source equipment for free stereoscopic display |
| KR20120030909A (en) * | 2010-09-20 | 2012-03-29 | 엘지디스플레이 주식회사 | Backlgiht unit and liquid crystal display device the same |
| CN102767803A (en) * | 2012-07-23 | 2012-11-07 | 冠捷显示科技（厦门）有限公司 | Support pillar of LED (light emitting diode) backlight module |
| CN203586722U (en) * | 2013-12-03 | 2014-05-07 | 江苏设计谷科技有限公司 | Direct type television diffusion plate support structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109932841A (en) * | 2019-04-03 | 2019-06-25 | 靖江市永盛光电科技有限公司 | A kind of direct-light-type backlight with optically focused bracket |
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Application publication date: 20151014 |