CN100451768C - Fixing mechanism for avoiding diffuser plate of full run-down type back light module from warp - Google Patents
Fixing mechanism for avoiding diffuser plate of full run-down type back light module from warp Download PDFInfo
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- CN100451768C CN100451768C CNB2004100549462A CN200410054946A CN100451768C CN 100451768 C CN100451768 C CN 100451768C CN B2004100549462 A CNB2004100549462 A CN B2004100549462A CN 200410054946 A CN200410054946 A CN 200410054946A CN 100451768 C CN100451768 C CN 100451768C
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- supporter
- diffuser plate
- fixed mechanism
- display element
- pillar
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Abstract
The present invention relates to a fixing mechanism which can be used in a back light module for preventing the warpage of a diffuser plate. The fixing mechanism at least comprises a supporting element and an adhesive body, wherein the supporting element is provided with a supporting column, both ends of the supporting column are respectively connected with a holding part and a fixing part, and the diffuser plate is arranged above the holding part of the supporting element; the adhesive body is arranged on the holding part of the supporting element to hold the diffuser plate through the viscosity.
Description
Technical field
The present invention relates to a kind of fixed mechanism that is arranged in the direct type backlight module, and be particularly related to a kind of fixed mechanism of avoiding the diffuser plate warpage of direct type backlight module.
Background technology
(Liquid Crystal Display LCD) has that volume is thin, in light weight, power consumption is few and a characteristic such as radiationless pollution, in day by day being widely used in recent years because LCD.LCD Panel (LCD) is assembled by the housing that a display unit (display unit), a backlight module, have framework.Display unit comprises a display panel (displ8y panel), but the thin-film package of the circuit board of process data signal and support usefulness (Tape Carrier Package, TCP) etc.
Backlight module is positioned at the display unit below, in order to the display unit of uniform light source to LCD to be provided.The presentation mode of light source can be divided into side light type back light module or direct type backlight module again.Generally speaking, the light source mode that the following product of 20 inch adopts mainly is to utilize line source of side (CCFL) or pointolite (LED), improve uniformity of light and luminescence efficiency with light guide plate and diffusion barrier diaphragms such as (blast bloomings) again, employed fluorescent tube number is about the 2-8 root.LCD TV has relatively high expectations to brightness and wide viewing angle characteristic, therefore straight-down negative will become the main flow of large-scale monitor (Monitor) and TV (TV), though with respect to the sidelight source, the employed fluorescent tube quantity of straight-down negative is more, but the light of straight-down negative by under directly inject, the uniform planeization of its light source only needs be finished by diffuser plate (and diffusion barrier) and gets final product, and does not need the guiding of light guide plate, with regard to overall package, straight-down negative has less parts.
Please refer to Fig. 1, Fig. 1 is the diagrammatic cross-section that shows a kind of traditional direct type backlight module.Direct type backlight module comprises at least: a housing 10, a reflecting plate 12, light source 14, a diffuser plate 16 and many diffusion barriers 18.The line source of straight-down negative (as the U-shaped fluorescent tube) 14 is arranged in the housing 10, utilizes diffuser plate 16 and diffusion barrier 18 to change the line source of fluorescent tube into planar light source.And be arranged on the reflecting plate 12 of housing 10 bottom surfaces, for example an aluminium sheet then can reflex to spuious luminous energy the video picture exiting surface, to promote whole luminous energy efficient.Make up with the display unit (not shown) again after the backlight module assembling, can finish LCD Panel.
At present the material of diffuser plate is many with engineering plastics, as polymethylmethacrylate (Poly MethylMethacrylate, PMMA), (Polycarbonate is main PC) for MS resin or polycarbonate plate.PMMA, MS have preferred optical characteristics and anti-UV effect, and cost is more cheap, but on the moisture absorption degree,, under hot and humid environment, interfere because of diffuser plate hygroscopic deformation warpage and display panel (Panel) easily and cause display frame to produce ripples lines (Pooling) phenomenon much larger than the PC material.As for the less PC of hydroscopicity, then be that the performance on resisting etiolation is relatively poor, and material cost is higher.
Please refer to Fig. 2, Fig. 2 shows that diffuser plate is out of shape the synoptic diagram of warpage because of moisture absorption.Wherein the housing of backlight module is omitted in Fig. 2.The approaching bottom surface of diffuser plate 16 and fluorescent tube is heated because of directly being subjected to light source irradiation, and water evaporates is very fast; Then temperature is lower for the another side that is right after with display panel (Panel) 21, so moisture evapotranspires slower.The moisture evapotranspiration rate difference on two sides causes diffuser plate 16 toward display panel 21 direction warpages.Generally between diffuser plate 16/ diffusion barrier 18 and display panel 21, can reserve a gap (gap), be out of shape the space of warpage so that diffuser plate 16 moisture absorptions to be provided.If its amount of warpage surpasses the gap width of being reserved, then the user is urged to the position of display panel 21 at diffuser plate 16 when starting display screen, and picture has ripples line (Pooling) phenomenon and produces, and influences picture quality.
One of general common solution is to utilize two-sided gum that diffuser plate 16 is fixed on the housing place of backlight module, to keep the flatness of diffuser plate 16; Yet this kind mode has assembling to be difficult for (two-sided gum is fixed in housing) and cost improves the shortcoming of (pasting two-sided gum cost of labor).Another common solution is that the housing at backlight module forms groove all around and puts diffuser plate 16, yet this mode can make diffuser plate 16 centres have very big area to be suspended on the light source top, easily because of producing bigger dilatational strain at middle section after the moisture absorption.No matter be which kind of settling mode, when diffuser plate 16 deflections surpass gap between display panel (panel) and the diffuser plate 16, then can make diffuser plate bear down on one and generation ripples lines (Pooling), as shown in Figure 2 to display panel (panel).In practical application design, the hygroscopic deformation amount is big more, and the gap that institute must reserve between display panel and the diffuser plate is just big more, and so increase the thickness of whole display element.
Therefore, how to reduce the hygroscopic deformation amount that diffuser plate is produced in the backlight module in hot and humid, to reach the product expectation of display element thinner thickness, a real important goal simultaneously for the industry research and development.
Summary of the invention
Given this, purpose of the present invention just provides a kind of fixed mechanism of avoiding the diffuser plate warpage of direct type backlight module, utilizes fixed mechanism to make diffuser plate still maintain very by a small margin distortion after moisture absorption, avoids being urged to display panel and produces the ripples line.
According to purpose of the present invention, a kind of fixed mechanism is proposed, this fixed mechanism is applied in the backlight module, wherein backlight module has a diffuser plate, this fixed mechanism comprises at least: a supporter, have a pillar, and the pillar two ends are connected with one respectively and keep a portion and a fixed part, this diffuser plate is positioned at the top of the portion that keeps of supporter, and the described pillar of wherein said supporter has texture; With a viscoid, this that is positioned at supporter kept in the portion, holds diffuser plate with the viscous force of viscoid.
According to purpose of the present invention, a kind of display element is also proposed, this display element comprises at least: a display panel; With a backlight module.This backlight module comprises: a housing (metal rear), and in order to place a plurality of optical elements (Back Light Components) of backlight module, this housing has a framework (housing); With a diffuser plate (diffuser plate), be placed on the framework, and utilize and to be arranged at least one fixed mechanism in the housing, to avoid the distortion warpage of diffuser plate.This fixed mechanism comprises at least: a supporter, have a pillar, and the pillar two ends are connected with one respectively and keep a portion and a fixed part, and this diffuser plate is positioned at the top of the portion that keeps of supporter, and the described pillar of wherein said supporter has texture; With a viscoid, be positioned at keeping in the portion of supporter, hold diffuser plate with the viscous force of viscoid.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below:
Description of drawings
Fig. 1 is the diagrammatic cross-section that shows a kind of traditional direct type backlight module.
Fig. 2 shows the synoptic diagram of diffuser plate because of the moisture absorption warpage.
Fig. 3 A is the synoptic diagram that is arranged at the fixed mechanism on the backlight module that shows one embodiment of the present invention.
Fig. 3 B is the enlarged diagram of fixed mechanism among the displayed map 3A.
Fig. 4 A is the synoptic diagram that shows the texture experiment at each position of supporter in the preferred embodiment of the present invention.
Fig. 4 B is the light path synoptic diagram that shows supporter in the preferred embodiment of the present invention.
Fig. 5 A～5C is the synoptic diagram that shows chamfering experiment in the preferred embodiment of the present invention.
Fig. 6 is the synoptic diagram that shows measurement diffuser plate deflection of the present invention.
Fig. 7 is using the PMMA diffuser plate, and when not using stationary installation of the present invention, the deflection of diffuser plate with light a lamp time relation figure (step 1).
Fig. 8 is using the MS diffuser plate, and when not using stationary installation of the present invention, the deflection of diffuser plate with light a lamp time relation figure (step 1).
Fig. 9 is using the MS diffuser plate, and when not using stationary installation of the present invention, the graph of a relation (step 2) of the deflection of diffuser plate and the back time of repose of turning off the light.
Figure 10 is using the MS diffuser plate, and when using stationary installation of the present invention, the deflection of diffuser plate with light a lamp time relation figure (step 1).
Figure 11 is using the MS diffuser plate, and when using stationary installation of the present invention, the graph of a relation (step 2) of the deflection of diffuser plate and the back time of repose of turning off the light.
Description of reference numerals:
10,30: housing
12,32: reflecting plate
14,40,64: light source
16,36,66: diffuser plate
18: diffusion barrier
21: display panel
31: framework
33: supporter
331: pillar
333: keep portion
335: fixed part
325: fastener
3331: the front of keeping portion
3332: the back side of keeping portion
35: some glue scope
62: transparent acrylic (PMMA) plate
65: probe
C1, C2, C3: chamfering
Embodiment
Fixed mechanism
Fig. 3 A is the synoptic diagram that is arranged at the fixed mechanism of mould backlight on determining that shows one embodiment of the present invention.Please be simultaneously with reference to Fig. 3 B, this figure is the enlarged diagram of fixed mechanism among the displayed map 3A.The backlight module of Fig. 3 A comprises a housing (Metal rear) 30, and this housing 30 has a framework (housing) 31, in order to place a plurality of optical elements (Back Light Components) (not shown) of backlight module.Housing 30 bottom surfaces preferably have a reflecting plate 32.The present invention is provided with at least one fixed mechanism in housing, put diffuser plate 36 again, is produced the distortion warpage to reduce diffuser plate 36 because of the high temperature moisture absorption.Fixed mechanism comprises a supporter 33 and a viscoid (not shown).Shown in Fig. 3 B, supporter 33 has a pillar 331, pillar 331 two ends are connected with one respectively and keep a portion 333 and a fixed part 335, wherein diffuser plate 36 is positioned at the top of the portion of keeping 333,335 bottom surfaces of being fixed in housing 30 of fixed part, for example have a plurality of fasteners 325 on the reflecting plate 32, in order to fixing fixed part 335 movably.And viscoid, for example viscose (having further discussion after a while) then is positioned in the portion that keeps 333 of supporter 33.In addition, those skilled in the art can understand the fastener 325 that proposes except this embodiment certainly, and fixed part 335 also can utilize other fixed form.
Therefore, fixed mechanism of the present invention avoids it to be suspended on outside housing 30 places except supporting the weight of diffuser plate 36, desires when the panel direction arches upward because of the high temperature moisture absorption when diffuser plate 36, and the viscous force of viscoid can be held diffuser plate 36, and then reduces deflection.
The material of diffuser plate 36, no matter be polymethylmethacrylate (Poly Methyl Methacrylate, PMMA), (Polycarbonate, PC) material all can be used fixed mechanism of the present invention to reduce its hygroscopic deformation amount for MS resin or polycarbonate plate.
In addition, in a preferred embodiment, as the material of supporter 33 and through texture experiment and chamfering experiment, this is a kind of mode that can make the shade improvement that the supporter 33 in the backlight module produced with transparent PMMA.
The texture experiment
Please refer to Fig. 4 A, this figure is the synoptic diagram that shows the texture experiment at each position of supporter in the preferred embodiment of the present invention.Pillar 331 two ends of supporter 33 connect portion of keeping 333 and fixed part 335 respectively, wherein fixed part 335 contacts with reflecting plate 32, the back side 3332 of keeping portion 333 directly is connected with pillar 331, keeps on 3331 points in front of portion 333 that (size of viscose is for example put shown in the glue scope 35) contacts with diffuser plate 36 behind the viscose.
In texture experiment, texture (atomizing is handled) on the not coplanar of supporter 33 respectively, and then supporter 33 placed in the backlight module, whether observe has shade to produce its result such as table one.
Table one
| The texture position | Keep the front 3331 of |
Keep the back side 3332 of |
The front 3331 and the back side 3332 | |
|
| Observe shade | Produce circle block shade | Produce circle block shade | Produce circle | Pillar | 331 round dot shades are eliminated, but peripheral tangent line still as seen |
Fig. 4 B is the light path synoptic diagram that shows supporter in the preferred embodiment of the present invention.Because light can produce different paths through different media, air is a thin medium, supporter 33 is a close medium, when the light of light source 40 arrives at and enters the fixed part 335 of supporter 33, light by thin medium to close medium, therefore incident angle is greater than emergence angle, and diffuser plate 36 is arrived at from keeping portion 333 in light a series of reflection back in pillar 331.This kind light path guiding mode up can reach the purpose of eliminating shade.
In addition, fixed part 335 areas of supporter 33 are bigger among Fig. 4, and it is less to keep portion's 333 areas, after the fixed part 335 that light penetration is transparent runs into reflecting plate 32, reflect up toward keeping portion's 333 directions, and then eliminate shade.
By experiment as can be known: pillar 331 textures can improve the shade that produces because of backlight; Transparent fixed part 335 areas also are a kind of mode of improving shade greater than the portion of keeping 333.Following chamfering experiment will further study how to improve peripheral tangent line shade.
The chamfering experiment
Please refer to Fig. 5 A～5C, this figure is the synoptic diagram that shows chamfering experiment in the preferred embodiment of the present invention.In this experiment, form difform chamfering at the edge of the portion that keeps 333 of supporter 33, and observe whether produce peripheral tangent line shade.
When chamfering shown in the C1 of Fig. 5 A, chamfering is with shade outward and produces.
When chamfering shown in the C2 of Fig. 5 B, chamfering is with shade outward and produces.
When chamfering shown in the C3 of Fig. 5 C, the shade of chamfering periphery is almost eliminated.In addition, the brightness at supporting plane place is brighter, can be improved after diffusion barrier being placed above the diffuser plate 36.
Viscoid is selected for use and effect
I. double faced adhesive tape: it is not good to paste planarity, is easy to generate bubble, and sees through the situation that has the color and luster inequality backlight.
II. chloroform: mobile high, the bad control of output, and have Ai, suck insalubrity for a long time.
III.AB glue: set time is oversize, must the time about 1 hour, use time-consuming.
IV. instant glue: LOCTITE 4860 (by the supply of happy safe (LOCTITE) company) is selected in experiment for use, and only need 3～5 minutes set time, and light transmission is good, and effect is good.
Comprehensively above-mentioned, the supporter 33 of fixed mechanism of the present invention, optimum condition is: select transparent material for use, the plane that contacts with diffuser plate 36 is the transparent optical sliding surface, horizontal edge (chamfering place) is the right angle, and leg portion need be done atomizing processing (texture increases light reflection probability).The viscoid of fixed mechanism of the present invention then preferably adopts instant glue LOCTITE 4860 (supply of happy safe (LOCTITE) company).
Below the probe-type instrument is used in experiment, to measure the mode of diffuser plate center deflection, relatively uses the distortion difference of fixed mechanism of the present invention front and back.
Use the difference of diffuser plate center, fixed mechanism of the present invention front and back deflection
Please refer to Fig. 6, this figure is the synoptic diagram that shows measurement diffuser plate deflection of the present invention.In this experiment, use 17 " LCD Panel is as test environment, and with transparent acrylic (PMMA) plate 62 replacement liquid crystal panels, emulation is the enclosed environment of LCD Panel originally; transparent acrylic (PMMA) plate 62 of convenient boring makes probe 65 can enter measurement smoothly.Shown in the 6th figure, probe 65 props up the center of diffuser plate 66 to carry out the measurement of deflection.In addition, utilize fixed jig to replace original LCD Monitor base fixed form, improve the LCD Panel base original fixed form caused rocks.
During experiment, get the diffuser plate 66 of PMMA or MS material, the condition of being statically placed in is the space of 50 ℃/90% humidity, makes its moisture absorption saturated, and group is stood in the LCD Panel again, lights a lamp and observes its maximum deformation quantity.The situation of data variation on the probe-type instrument and record are in addition observed in the back that lights a lamp.
During measurement, step 1 (Step1) representative: measure the upright good LCD Panel of group just, light a lamp and measure the deflection (Δ D) of diffuser plate 66.Step 2 (Step2) representative: treat to leave standstill after step 1 is turned off the light 12 hours (or more than 12 hours), light a lamp again and measure diffuser plate 66 deflections (Δ D), with the real operating position of simulation user.Experimental result is as follows.
Fig. 7 is for using the PMMA diffuser plate, and when not using stationary installation of the present invention, the deflection of diffuser plate with light a lamp time relation figure (step 1).The result shows: under the situation that does not have stationary installation (supporter and viscoid), after lighting a lamp 30 minutes, the center of PMMA diffuser plate 66 promptly produces the deflection of 1.2mm, and along with the time of lighting a lamp increases, the deflection of diffuser plate 66 also produces acute variation thereupon.
Fig. 8 is for using the MS diffuser plate, and when not using stationary installation of the present invention, the deflection of diffuser plate with light a lamp time relation figure (step 1).The result shows: after beginning to light a lamp, the center of MS diffuser plate 66 is earlier recessed to lamp source 64, after the 2 hours time of lighting a lamp, gradually towards 62 distortion (this characteristic with MS material itself is relevant) of acryl (PMMA) plate; Yet with the time increase of lighting a lamp, the deflection of diffuser plate 66 also increases thereupon.
Fig. 9 is for using the MS diffuser plate, and when not using stationary installation of the present invention, the graph of a relation (step 2) of the deflection of diffuser plate and the back time of repose of turning off the light.The result shows: after beginning to turn off the light, the deflection of MS diffuser plate 66 returns back to about 0.3mm from initial 1.00mm.
Figure 10 is for using the MS diffuser plate, and when using stationary installation of the present invention, the deflection of diffuser plate with light a lamp time relation figure (step 1).The result shows: after beginning to light a lamp, MS diffuser plate 66 is owing to there is the effect of supporter of the present invention and viscose, the situation that does not have indent produces, and lighting a lamp back 30 minutes, though still have the situation of hygroscopic deformation to produce, deflection is no more than 0.3mm, and with the time increase of lighting a lamp, even light a lamp 1035 minutes (about 17.25 hours), the deflection of diffuser plate 66 also is controlled at 0.3mm between the 0.2mm.
Figure 11 is for using the MS diffuser plate, and when using stationary installation of the present invention, the graph of a relation (step 2) of the deflection of diffuser plate and the back time of repose of turning off the light.The result shows: after beginning to turn off the light, the deflection of MS diffuser plate 66 also is controlled at 0.25mm between the 0.2mm.
Therefore, by above-mentioned experimental result as can be known: use the deflection that fixed mechanism of the present invention can reduce diffuser plate, and then make the integral thickness attenuation of display panels.
More than, though be that embodiment does explanation so that one group of fixed mechanism to be set in the backlight module, the present invention is defined to this example, also can use more than two groups.Those skilled in the art can consider other embodiment certainly in addition, selecting for use or the external form of supporter of viscoid for example, the feature that neither disengaging the present invention proposes.Moreover those skilled in the art should understand, and the supporter of fixed mechanism also can make otherwise and fix except fixing as the fastener 325 that embodiment proposed, and can't impact feature of the present invention.
The above; though the present invention with preferred embodiment openly as above; yet; it is not in order to limit the present invention; those skilled in the art; under the premise without departing from the spirit and scope of the present invention, can do various changes and retouching certainly, so protection scope of the present invention should be looked the scope that is defined with appended claims and is as the criterion.
Claims (22)
1. a fixed mechanism is applied in the backlight module, and wherein said backlight module has a diffuser plate, and described fixed mechanism comprises at least:
One supporter, it has a pillar, described pillar two ends are connected with one respectively and keep a portion and a fixed part, and described diffuser plate is positioned at the described top of keeping portion of described supporter, and the described pillar of wherein said supporter has texture; With
One viscoid, it is positioned at the described of described supporter keeps in the portion, holds described diffuser plate with the viscous force of described viscoid.
2. fixed mechanism as claimed in claim 1, wherein said backlight module has a housing, and described housing bottom has a reflection bottom face and a plurality of fluorescent tube, and the described fixed part of described supporter is fixed on the described reflection bottom face.
3. fixed mechanism as claimed in claim 2 has a plurality of fasteners on the wherein said reflection bottom face, be used for to fix described fixed part movably.
4. fixed mechanism as claimed in claim 1, wherein said supporter are transparent material.
5. fixed mechanism as claimed in claim 4, wherein said supporter are the polymethylmethacrylate material.
6. fixed mechanism as claimed in claim 4, the described pillar of wherein said supporter are applied in cloudy surface and handle.
7. fixed mechanism as claimed in claim 1, wherein said supporter is integrally formed with injection molding technology.
8. fixed mechanism as claimed in claim 1, the described portion of keeping of wherein said supporter is a transparent smooth flat.
9. fixed mechanism as claimed in claim 1, wherein said viscoid is preferably instant glue.
10. fixed mechanism as claimed in claim 1, wherein said diffuser plate are the polymethylmethacrylate material.
11. fixed mechanism as claimed in claim 1, wherein said diffuser plate are MS resin material.
12. a display element comprises at least:
One display panel; With
One backlight module,
Described backlight module comprises:
One housing, in order to place a plurality of optical elements of described backlight module, described housing has a framework; With
One diffuser plate is set on the described framework, and a fixed mechanism is set in the described housing, is used to reduce the distortion warpage of described diffuser plate,
Described fixed mechanism comprises at least:
One supporter, it has a pillar, and described pillar two ends are connected with one respectively and keep a portion and a fixed part, and described diffuser plate is positioned at the described top of keeping portion of described supporter, and the described pillar of wherein said supporter has texture; With
One viscoid, it is positioned at the described of described supporter keeps in the portion, holds described diffuser plate with the viscous force of described viscoid.
13. display element as claimed in claim 12, wherein said housing bottom also has a reflection bottom face, and the described fixed part of described supporter is fixed on the described reflection bottom face.
14. display element as claimed in claim 13 has a plurality of fasteners on the wherein said reflection bottom face, in order to fix described fixed part movably.
15. display element as claimed in claim 12, wherein said supporter are transparent material.
16. display element as claimed in claim 12, wherein said supporter are the polymethylmethacrylate material.
17. display element as claimed in claim 12, the described pillar of wherein said supporter are applied in cloudy surface and handle.
18. display element as claimed in claim 12, wherein said supporter is integrally formed with injection molding technology.
19. display element as claimed in claim 12, the described portion of keeping of wherein said supporter is a transparent smooth flat.
20. display element as claimed in claim 12, wherein said viscoid is preferably instant glue.
21. display element as claimed in claim 12, wherein said diffuser plate are the polymethylmethacrylate material.
22. display element as claimed in claim 12, wherein said diffuser plate are MS resin material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100549462A CN100451768C (en) | 2004-07-26 | 2004-07-26 | Fixing mechanism for avoiding diffuser plate of full run-down type back light module from warp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100549462A CN100451768C (en) | 2004-07-26 | 2004-07-26 | Fixing mechanism for avoiding diffuser plate of full run-down type back light module from warp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1727961A CN1727961A (en) | 2006-02-01 |
| CN100451768C true CN100451768C (en) | 2009-01-14 |
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| CNB2004100549462A Expired - Fee Related CN100451768C (en) | 2004-07-26 | 2004-07-26 | Fixing mechanism for avoiding diffuser plate of full run-down type back light module from warp |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101476689B (en) * | 2009-01-16 | 2011-08-03 | 南京中电熊猫液晶显示科技有限公司 | Back light module unit |
| CN102621727B (en) * | 2012-04-28 | 2015-07-15 | 深圳市华星光电技术有限公司 | Liquid crystal display device and backlight module |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001066579A (en) * | 1999-08-30 | 2001-03-16 | Nec Kagoshima Ltd | Liquid crystal display device and its production |
| US20020044437A1 (en) * | 2000-10-14 | 2002-04-18 | Lee Joung Jae | Back light assembly for liquid crystal display device |
| US20020149713A1 (en) * | 2001-04-17 | 2002-10-17 | Nec Corporation | Liquid crystal display device |
| JP2004039476A (en) * | 2002-07-04 | 2004-02-05 | Sharp Corp | Backlight device and liquid crystal display device |
| CN1508607A (en) * | 2002-12-19 | 2004-06-30 | �ն��繤��ʽ���� | Double-refraction optical film, elliptic polarizing piece using same and liquid crystal display using said polarizing piece |
-
2004
- 2004-07-26 CN CNB2004100549462A patent/CN100451768C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001066579A (en) * | 1999-08-30 | 2001-03-16 | Nec Kagoshima Ltd | Liquid crystal display device and its production |
| US20020044437A1 (en) * | 2000-10-14 | 2002-04-18 | Lee Joung Jae | Back light assembly for liquid crystal display device |
| US20020149713A1 (en) * | 2001-04-17 | 2002-10-17 | Nec Corporation | Liquid crystal display device |
| JP2004039476A (en) * | 2002-07-04 | 2004-02-05 | Sharp Corp | Backlight device and liquid crystal display device |
| CN1508607A (en) * | 2002-12-19 | 2004-06-30 | �ն��繤��ʽ���� | Double-refraction optical film, elliptic polarizing piece using same and liquid crystal display using said polarizing piece |
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| CN1727961A (en) | 2006-02-01 |
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