CN1641442A - Back-light mechanism for liquid crystal display device - Google Patents
Back-light mechanism for liquid crystal display device Download PDFInfo
- Publication number
- CN1641442A CN1641442A CNA2004100797509A CN200410079750A CN1641442A CN 1641442 A CN1641442 A CN 1641442A CN A2004100797509 A CNA2004100797509 A CN A2004100797509A CN 200410079750 A CN200410079750 A CN 200410079750A CN 1641442 A CN1641442 A CN 1641442A
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- CN
- China
- Prior art keywords
- liquid crystal
- light
- display device
- flat lamp
- crystal display
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0273—Diffusing elements; Afocal elements characterized by the use
- G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- 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
- G02F1/13356—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements
- G02F1/133567—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements on the back side
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Abstract
To provide a backlight unit for a liquid crystal display device in which the lack or unevenness of illumination does not occur even in the case of a large-sized liquid crystal display device, and which prevents a light diffusion member by the own weight of the light diffusion member or a heat generated from a surface emitting flat lamp, can illuminate in a high quality level, has the small number of components, and can reduce a manufacturing cost without requiring a time and effort in manufacturing by a simple structure. the surface emitting flat lamp 1 used as a light source, and an air layer 2 formed between the flat lamp 1 and the light diffusion member 3. The light diffusion member 3 is supported by a supporting member 4 from the back surface side.
Description
Technical field
The present invention relates to back-light mechanism for liquid crystal display device, particularly light source adopts the back-light mechanism for liquid crystal display device of the luminous flat lamp of face.
Background technology
In recent years, adopt the liquid crystal indicator that has back-light mechanism, as the thin-type display device of TV and computing machine.
The back-light mechanism that adopts in this before liquid crystal indicator adopts the marginal ray mode more.That is, as Fig. 7～shown in Figure 8, in the end of light guide plate 101 with light transmission, the such linear light source 104 (seeing patent documentation 1) of configuration fluorescent tube.
This marginal ray mode, normally in the rear side of light guide plate 101, partly cover the index of refraction light diffusate 106 bigger than the material of light guide plate 101, almost cover its whole with reflection layer 103, at the plate or the sheet material of the surface configuration light diffusing of light guide plate 101, form light diffusion layer 102.
But, along with the maximization of liquid crystal indicator, in the marginal ray mode, except the illumination deficiency, inhomogeneous owing to setting the such linear light source of fluorescent tube at periphery, so, also exist the problem that can not make equipment miniaturization.
In order to address this problem, formula is backlight under having proposed in patent documentation 2, and formula is backlight under being somebody's turn to do, and is the such linear light source of rear side configuration fluorescent tube at light diffusing member.But, in large-scale liquid crystal indicator,, must dispose a plurality of linear light sources in order not produce illumination deficiency, uneven problem, and dispose the filter sheet corresponding, like this, cause number of parts to increase with linear light source, complex structureization makes trouble, and manufacturing cost improves.
Patent documentation 1: Japanese kokai publication hei 6-95107 communique
Patent documentation 2: Japanese kokai publication hei 11-24583 communique
Summary of the invention
The present invention makes in view of the problem of above-mentioned back-light mechanism of the prior art, and its objective is provides back-light mechanism for liquid crystal display device.In this back-light mechanism, light source is the luminous flat lamp of employing face, promptly is used in large-scale liquid crystal indicator, also can not produce illumination deficiency, inhomogeneous, simultaneously, can prevent that the heat that produces because of the deadweight of light diffusing member or because of flat lamp from causing the distortion (deflection) of light diffusing member, can carry out high-quality illumination, and, number of parts is few, simple structure is made and is not bothered low cost of manufacture.
To achieve these goals, back-light mechanism for liquid crystal display device of the present invention is characterized in that, light source is the luminous flat lamp of employing face, forms air layer between flat lamp and light diffusing member, is supporting above-mentioned light diffusing member with support unit from rear side.
At this moment, support unit can be provided in the surface of the luminous flat lamp of face.
In addition, support unit can form with transparent or semitransparent synthetic resin material.
In addition, planar twelve Earthly Branches chengguang proliferation part be can be, wire or point-like twelve Earthly Branches chengguang proliferation part perhaps are with the summit of support unit.
In addition, can form the dip plane that expansion is opened from rear side towards face side to the inner peripheral surface of the periphery frame at interval between luminous flat lamp of maintenance face and the light diffusing member.
The invention effect
According to back-light mechanism for liquid crystal display device of the present invention, because light source is the luminous flat lamp of employing face, so, promptly be used in large-scale liquid crystal indicator, can illumination deficiency, inhomogeneous yet.
In addition, because between luminous flat lamp of face and light diffusing member, formed air layer, and, supporting light diffusing member with support unit from rear side, so, can prevent distortion (deflection) that the heat that takes place because of the deadweight of light diffusing member or because of flat lamp causes light diffusing member and adopt flat lamp, can carry out high-quality illumination as the light source ground that complements each other, and, number of parts is few, simple structure is made and is not bothered low cost of manufacture.
In addition, because support unit is configured in the surface of the luminous flat lamp of face, so support unit is not subjected to the constraint of the shape of flat lamp etc., can be configured in the optional position, can support light diffusing member with support unit effectively.
In addition, because support unit is to form with transparent or semitransparent synthetic resin material, so it is even can not produce the uneven illumination that is caused by support unit.
In addition, owing to being, the summit with support unit supporting light diffusing member planarly, so, can strengthen the bearing area of support unit to light diffusing member, support light diffusing member more effectively, on the other hand, owing to be wire or be point-like twelve Earthly Branches chengguang proliferation part with the summit of support unit, so it is even more not produce the uneven illumination that is caused by support unit.
In addition, owing to, form the dip plane that expansion is opened from rear side towards face side at interval the inner peripheral surface of periphery frame between luminous flat lamp of maintenance face and the light diffusing member, so, can enlarge effective irradiated area of flat lamp, can make equipment miniaturization.
Description of drawings
Fig. 1 is the schematic partial sectional view of expression back-light mechanism for liquid crystal display device one embodiment of the present invention.
Fig. 2 is the whole approximate three-dimensional map of the foregoing description.
Fig. 3 represents the state that sets of the support unit in the foregoing description, (a) is partial perspective view, (b) is schematic partial sectional view.
Fig. 4 is the local section stereographic map of the state that sets of the above-mentioned support unit of expression.
Fig. 5 is the key diagram of the section configuration of the above-mentioned support unit of expression.
Fig. 6 is the luminous flat lamp of face in expression the foregoing description, (a) is face side, (b) is the partial enlarged drawing of (a), (c) is rear side.
Fig. 7 is the stereographic map of back-light mechanism before.
Fig. 8 is the outboard profile of back-light mechanism before.
Embodiment
Below, with reference to the example of description of drawings back-light mechanism for liquid crystal display device of the present invention.
Fig. 1～Fig. 6 represents an embodiment of back-light mechanism for liquid crystal display device of the present invention.
This back-light mechanism for liquid crystal display device, light source is to adopt flat light source, specifically, be to adopt the luminous flat lamp 1 of face that constitutes by as shown in Figure 6 fluorescent tube, between this flat lamp 1 and light diffusing member 3, formed air layer 2, and, with support unit 4 rear side supporting light diffusing member 3.
In addition, according to the shape of back-light mechanism for liquid crystal display device, the luminous flat lamp 1 of face can adopt one, and use also can combine the flat lamp 1 of suitable number.
At this moment, as shown in Figure 1, support unit 4 can be provided in the surface (flat lamp 1 that is made of as shown in Figure 6 fluorescent tube of the luminous flat lamp 1 of face, can be with its arbitrary face as face side, still, in the present embodiment, be with an irregular side as face side, it is even not produce uneven illumination).At this moment, support unit 4 can contact with the surface of the luminous flat lamp 1 of face, also can not contact.
Though the shape and the material of support unit 4 are not particularly limited,, as in the present embodiment, section configuration is formed the rectangular fin shape, can strengthen the bearing area of 4 pairs of light diffusing members 3 of support unit, can support light diffusing member 3 more effectively.
Section configuration forms the support unit 4 of rectangular fin shape, should empty open several cm～tens of cm, preferably count the interval that cm～ten count cm, equally spaced is adapted to parallel or clathrate.
In addition, the end of support unit 4 is supported on the periphery frame 5 by chimeric etc., and this periphery frame 5 is used for the interval between luminous flat lamp 1 of maintenance face and the light diffusing member 3.
Like this, because support unit 4 is configured in the surface of the luminous flat lamp 1 of face, so support unit 4 is not subjected to the constraint of the shape of flat lamp 1 etc., can be configured in the optional position, can support light diffusing members 3 with support unit 4 more effectively.
As mentioned above, support unit 4 can be configured in the surface of the luminous flat lamp 1 of face, still, in addition, also can be configured in the end (between the adjacent flat lamp 1) of the luminous flat lamp 1 of face as illustrated in fig. 3.In addition, in case of necessity, also can be as illustrated in fig. 4, these two kinds of collocation methods of dual-purpose.
At this moment, support unit 4 can be by backplate 7 supportings of luminous flat lamp 1 rear side of the face that is provided in.
In addition, in the present embodiment, the shape of support unit 4 is that section configuration is the rib shape of rectangle, in addition, also can be as shown in Figure 5, form roughly that triangle (two equilateral triangles), summit form curve form, form convex, pin shape etc., can form arbitrary shape.Like this, the supporting form of the light diffusing member 3 on the summit of support unit 4 can also be wire or point-like except planar.When being planar twelve Earthly Branches chengguang proliferation part 3, the bearing area of 4 pairs of light diffusing members 3 of support unit can be strengthened, light diffusing member 3 can be supported effectively with the summit of support unit 4.On the other hand, when being wire or point-like twelve Earthly Branches chengguang proliferation part 3 with the summit of support unit 4, it is even more can not produce the uneven illumination that is caused by support unit 4.
In addition, in the present embodiment, the inner peripheral surface 51 being used for the periphery frame 5 at interval between luminous flat lamp 1 of maintenance face and the light diffusing member 3 forms the dip plane that expansion is opened from rear side towards face side.
Like this, in fact can enlarge effective irradiated area of the luminous flat lamp 1 of face, make equipment miniaturization.
This back-light mechanism for liquid crystal display device, more particularly, in face side as the luminous flat lamp 1 of the face of light source, setting light diffusing member 3 by air layer 2, this light diffusing member 3 be by be supported that light diffusing sheet 31 that parts 4 and periphery frame 5 supporting and light diffusing sheet 32 constitute (constituting the light diffusing sheet 31 of light diffusing member 3 and the layer structure of light diffusing sheet 32 is arbitrarily, for example, can constitute light diffusing sheet 32 with some light diffusing sheets).With body frame 8 and press box 9 they are seized on both sides by the arms, the junction surface 81,91 of body frame 8 and press box 9 is engaged, form as one.In addition, the fixing of body frame 8 and press box 9 also can carry out with primary screw.
At this moment, between the end 11 and body frame 8 of the luminous flat lamp 1 of face, folder is being established the pad 10 with resiliency.
Like this, with body frame 8 and press box 9 component parts of back-light mechanism for liquid crystal display device is held under the arm, form as one, so, can carry out the assembling of back-light mechanism simply, and, can enough half-finished modes carry out the transportation, keeping of back-light mechanism etc., the degree of freedom height of liquid crystal indicator manufacturing process, low cost of manufacture.
In addition, set liquid crystal board P, set light-reflecting sheet 6 and backplate 7, cover outer peripheral face with top cover 12, all forming as one in the rear side of the luminous flat lamp 1 of face in the face side of light diffusing member 3.
In addition, periphery frame 5, body frame 8, press box 9, top cover 12 etc. can form with synthetic resin material or metal material.
Like this, above-mentioned back-light mechanism for liquid crystal display device, because light source is the luminous flat lamp 1 of employing face, so, promptly be used in large-scale liquid crystal indicator, can not produce illumination deficiency, uneven problem yet.
In addition, owing between luminous flat lamp 1 of face and light diffusing member 3, formed air layer 2, and, supporting light diffusing member 3 with support unit 4 from rear side, so, can prevent that the heat that takes place because of the deadweight of light diffusing member 3 or because of flat lamp 1 from causing the distortion (deflection) of light diffusing member 3, with the luminous flat lamp 1 of use face as the light source ground that complements each other, can carry out high-quality illumination, and number of parts is few, simple structure, make and do not bother low cost of manufacture.
Above, with embodiment back-light mechanism for liquid crystal display device of the present invention has been described, still, the present invention is not limited to the structure that the foregoing description is put down in writing, and in the scope that does not break away from its purport, its structure can be done suitable change.
Industrial applicibility
Liquid crystal indicator back-light mechanism of the present invention does not produce illumination deficiency, inhomogeneous Problem, and, can prevent that the heat that takes place because of the deadweight of light diffusing member or because of flat lamp from leading Cause the distortion (deflection) of light diffusing member, can carry out high-quality illumination, and, number of parts Few, simple structure is made and is not bothered low cost of manufacture. Especially it is aobvious to be suitable as large-scale liquid crystal Show the back-light mechanism that device is used.
Claims (6)
1. back-light mechanism for liquid crystal display device is characterized in that, light source is the luminous flat lamp of employing face, forms air layer between flat lamp and light diffusing member, is supporting above-mentioned light diffusing member with support unit from rear side.
2. back-light mechanism for liquid crystal display device as claimed in claim 1 is characterized in that, support unit is provided in the surface of the luminous flat lamp of face.
3. back-light mechanism for liquid crystal display device as claimed in claim 1 or 2 is characterized in that, support unit is to form with transparent or semitransparent synthetic resin material.
4. as claim 1,2 or 3 described back-light mechanism for liquid crystal display device, it is characterized in that, be planar twelve Earthly Branches chengguang proliferation part with the summit of support unit.
5. as claim 1,2 or 3 described back-light mechanism for liquid crystal display device, it is characterized in that, be wire or point-like twelve Earthly Branches chengguang proliferation part with the summit of support unit.
6. as claim 1,2,3,4 or 5 described back-light mechanism for liquid crystal display device, it is characterized in that the inner peripheral surface the periphery frame at interval between luminous flat lamp of maintenance face and the light diffusing member forms the dip plane that expansion is opened from rear side towards face side.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP006488/2004 | 2004-01-14 | ||
| JP2004006488A JP4066053B2 (en) | 2004-01-14 | 2004-01-14 | Backlight unit for liquid crystal display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1641442A true CN1641442A (en) | 2005-07-20 |
Family
ID=34820430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004100797509A Pending CN1641442A (en) | 2004-01-14 | 2004-09-16 | Back-light mechanism for liquid crystal display device |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP4066053B2 (en) |
| KR (1) | KR20050074886A (en) |
| CN (1) | CN1641442A (en) |
| TW (1) | TW200530705A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101713840A (en) * | 2008-09-30 | 2010-05-26 | 住友化学株式会社 | Polarizing plate, liquid crystal panel and liquid crystal display |
| CN101573653B (en) * | 2006-12-26 | 2011-03-16 | 夏普株式会社 | Backlight device, display, and TV receiver |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4640264B2 (en) * | 2006-06-02 | 2011-03-02 | ソニー株式会社 | Planar light source device and display device assembly |
| US20100124046A1 (en) | 2007-04-09 | 2010-05-20 | Yasumori Kuromizu | Lighting device for display device, display device, and television receiver apparatus |
| EP2136243A4 (en) | 2007-04-09 | 2011-04-27 | Sharp Kk | Lighting device for display device, display device, and tv receiver |
| DE202007005456U1 (en) * | 2007-04-16 | 2007-06-28 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Lighting system with a flat lamp and a frame |
| TWI409549B (en) * | 2010-08-02 | 2013-09-21 | Au Optronics Corp | Frame, backlight module, display device and method for assembling the same |
| JP6035998B2 (en) * | 2012-08-20 | 2016-11-30 | 岩崎電気株式会社 | Simulated solar irradiation device |
| CN107203070B (en) * | 2017-07-19 | 2021-03-02 | 京东方科技集团股份有限公司 | Composite film, manufacturing method thereof, backlight source and display device |
-
2004
- 2004-01-14 JP JP2004006488A patent/JP4066053B2/en not_active Expired - Fee Related
- 2004-08-18 TW TW093124874A patent/TW200530705A/en unknown
- 2004-09-04 KR KR1020040070598A patent/KR20050074886A/en not_active Application Discontinuation
- 2004-09-16 CN CNA2004100797509A patent/CN1641442A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101573653B (en) * | 2006-12-26 | 2011-03-16 | 夏普株式会社 | Backlight device, display, and TV receiver |
| CN101713840A (en) * | 2008-09-30 | 2010-05-26 | 住友化学株式会社 | Polarizing plate, liquid crystal panel and liquid crystal display |
Also Published As
| Publication number | Publication date |
|---|---|
| TW200530705A (en) | 2005-09-16 |
| JP2005203164A (en) | 2005-07-28 |
| JP4066053B2 (en) | 2008-03-26 |
| KR20050074886A (en) | 2005-07-19 |
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