CN105204228A - Direct type backlight module and liquid crystal display - Google Patents
Direct type backlight module and liquid crystal display Download PDFInfo
- Publication number
- CN105204228A CN105204228A CN201510683064.0A CN201510683064A CN105204228A CN 105204228 A CN105204228 A CN 105204228A CN 201510683064 A CN201510683064 A CN 201510683064A CN 105204228 A CN105204228 A CN 105204228A
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- light source
- lamp bar
- backlight module
- direct type
- type backlight
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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
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
-
- 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
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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)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a direct type backlight module which comprises a back frame (10) and at least two light bars, wherein the back frame (10) comprises a base plate (11) and inclined plates (12) arranged on the edges of the base plate (11); the included angle between each inclined plate (12) and the base plate (11) is an obtuse angle; the light bars are distributed on the base plate (11) at intervals; the distances between the edge light sources of the light bars and the edges of the corresponding inclined plates (12) which the light bars face towards are different. The invention further discloses a liquid crystal display comprising the direct type backlight module. According to the invention, first light sources on first light bars and second light sources on second light bars are arranged at unequal intervals, so that the problems of dark frames on the periphery and dark spots at corners, caused by dark areas at a bevel part between the inclined plates and the base plate of the back frame can be solved.
Description
Technical field
The invention belongs to technical field of liquid crystal display, specifically, relate to a kind of direct type backlight module and liquid crystal display.
Background technology
Along with the evolution of photoelectricity and semiconductor technology, also the flourish of flat-panel monitor (FlatPanelDisplay) has been driven, and in many flat-panel monitors, liquid crystal display (LiquidCrystalDisplay, be called for short LCD) because having many advantageous characteristic such as high spatial utilization ratio, low consumpting power, radiationless and low EMI, be applied to the various aspects of productive life.
Liquid crystal display generally includes the liquid crystal panel and backlight module that are oppositely arranged, and wherein, backlight module provides uniform area source to liquid crystal panel, to make liquid crystal panel show image.According to the difference of light inlet mode, backlight module is generally divided into direct type backlight module and side-entering type backlight module.
In the liquid crystal display with direct type backlight module, because lamp box height is higher, usually the side plate of back of the body frame can be designed to heeling condition, to improve the apparent thickness of liquid crystal display.But can there is blanking bar by the angled portion between the inclined side plate of back of the body frame and base plate in the design of this inclined side plate, thus occur the phenomenon of the dark frame of surrounding and corner blackening usually.
Summary of the invention
In order to solve above-mentioned prior art Problems existing, the object of the present invention is to provide a kind of direct type backlight module, it comprises: back of the body frame, comprises base plate and is arranged on the hang plate at edge of described base plate, wherein, the angle of described hang plate and described base plate is obtuse angle; At least two lamp bars, are intervally arranged on described base plate, and the distance between the edge light source of each lamp bar and the outer of the hang plate faced by it is all not identical.
Further, one of described two lamp bars are the first lamp bar, and another of described two lamp bars is the second lamp bar; Described first lamp bar and described second lamp bar are intervally arranged on described base plate, and the distance described in the Distance geometry between the edge light source of described first lamp bar and the outer of the hang plate faced by it between edge light source of the second lamp bar and the outer of the hang plate faced by it is not identical.
Further, the distance between the described edge light source of the second lamp bar and the outer of the hang plate faced by it is greater than the distance between the described edge light source of the first lamp bar and the outer of the hang plate faced by it.
Further, described first lamp bar comprises the first power supply board and is spaced at multiple first light sources on described first power supply board; Wherein, the first light source being positioned at described first power supply board edge is the edge light source of described first lamp bar; Described second lamp bar comprises the second power supply board and is spaced at the multiple secondary light sources on described second power supply board; Wherein, the secondary light source being positioned at described second power supply board edge is the edge light source of described second lamp bar.
Further, the quantity of described secondary light source is less than the quantity of described first light source.
Further, described first light source and/or described secondary light source are the LED of band lens.
Further, the distance described in the Distance geometry between the described edge light source of the second lamp bar and the outer of the hang plate faced by it between edge light source of the first lamp bar and the outer of the hang plate faced by it meets formula below,
h1<H/2<h2；
D/5<h2-h1<D；
h1/4<d<2h1/3；
Wherein, h1 represents the distance between the described edge light source of the first lamp bar and the outer of the hang plate faced by it, h2 represents the distance between the described edge light source of the second lamp bar and the outer of the hang plate faced by it, H represents the peak width at half height of the LED of described band lens, D represents the distance described in backlight module between base plate and diffuser plate, and d represents the projected length of described hang plate on described base plate.
Further, described direct type backlight module also comprises; Shading column, between the edge light source being arranged on adjacent two lamp bars.
Further, described direct type backlight module also comprises; Shading column, between the edge light source being arranged on the edge light source of the described first lamp bar described second lamp bar adjacent with it.
Another object of the present invention is also to provide a kind of liquid crystal display with above-mentioned direct type backlight module.
Beneficial effect of the present invention: because the secondary light source on the first light source on the first lamp bar and the second lamp bar forms unequal interval arrangement, therefore can solve the problem of the dark frame of surrounding and the corner blackening occurred because the angled portion carried on the back between the hang plate of frame and base plate occurs blanking bar.In addition, between the first often adjacent lamp bar and the edge light source of the second lamp bar, a shading column is set, this shading column can make light disperse, thus avoids the appearance of the light and shade block phenomenon caused because the first light source and secondary light source form unequal-interval arrangement.
Accompanying drawing explanation
The following description carried out in conjunction with the drawings, the above-mentioned and other side of embodiments of the invention, feature and advantage will become clearly, in accompanying drawing:
Fig. 1 is the stereographic map carrying on the back frame according to an embodiment of the invention;
Fig. 2 is the cut away view of carrying on the back frame according to an embodiment of the invention;
Fig. 3 is the schematic top plan view of carrying on the back frame according to an embodiment of the invention and being arranged on the lamp bar in back of the body frame;
Fig. 4 is the sectional view of backlight module according to an embodiment of the invention;
Fig. 5 is the structural representation of liquid crystal display according to an embodiment of the invention.
Embodiment
Below, embodiments of the invention are described in detail with reference to the accompanying drawings.But, the present invention can be implemented in many different forms, and the present invention should not be interpreted as being limited to the specific embodiment of setting forth here.On the contrary, provide these embodiments to be to explain principle of the present invention and practical application thereof, thus enable others skilled in the art understand various embodiment of the present invention and be suitable for the various amendments of certain expected application.
In the accompanying drawings, in order to know device, exaggerate the thickness in layer and region.Identical label represents identical element in the accompanying drawings all the time.
Although will be appreciated that and term " first ", " second ", " the 3rd " etc. can be used here to describe various element, these elements should by the restriction of these terms.These terms are only for separating an element and another element region.
Fig. 1 is the stereographic map carrying on the back frame according to an embodiment of the invention.Fig. 2 is the cut away view of carrying on the back frame according to an embodiment of the invention.
See figures.1.and.2, carry on the back frame 10 according to an embodiment of the invention and comprise: base plate 11, hang plate 12.Base plate 11 entirety is in tabular.Four hang plates 12 are separately positioned on the edge, surrounding of base plate 11.Here, each hang plate 12 is obtuse angle with the angle of base plate 11; In other words, four hang plates 12 surround formation opening is square " loudspeaker ".
Preferably, in the present embodiment, each hang plate 12 is equal with the angle of base plate 11, but the present invention is not restricted to this.
Fig. 3 is the schematic top plan view of carrying on the back frame according to an embodiment of the invention and being arranged on the lamp bar in back of the body frame.Fig. 4 is the sectional view of backlight module according to an embodiment of the invention.
With reference to Fig. 3 and Fig. 4, backlight module 1 comprises according to an embodiment of the invention: the back of the body frame 10, multiple first lamp bar 20a, multiple second lamp bar 20b, diffuser plate 30 and blooming piece 40.
First lamp bar 20a and the second lamp bar 20b replaces in the row direction and is intervally arranged on the base plate 11 of back of the body frame 10, but the present invention is not restricted to this, such as, the first lamp bar 20a and the second lamp bar 20b also can replace along column direction and be intervally arranged on the base plate 11 of back of the body frame 10.Diffuser plate 30 and blooming piece 40 are successively set on the hang plate 12 of back of the body frame 10.In the present embodiment, the quantity that light writes diaphragm 40 can be designed according to the actual requirements, concrete restriction not done to the quantity of blooming piece 40 at this.
Here, the distance between the edge light source of the first lamp bar 20a and the second lamp bar 20b and the outer of the hang plate 12 of the back of the body frame 10 faced by it is not identical.In the present embodiment, preferably, distance between the outer of the hang plate 12 of the edge light source of the second lamp bar 20b and the back of the body frame 10 faced by it is greater than the distance between the outer of the hang plate 12 of the edge light source of the first lamp bar 20a and the back of the body frame 10 faced by it, but the present invention is not restricted to this.
Here, with reference to Fig. 2, when the hang plate 12 carrying on the back frame 10 projects on the base plate 11 carrying on the back frame 10, projection and the fillet of base plate 11 of back of the body frame 10 of the hang plate 12 of back of the body frame 10 are the interior edge of the hang plate 12 carrying on the back frame 10, and the projection of carrying on the back the hang plate 12 of frame 10 limit relative with this fillet is the outer of the hang plate 12 carrying on the back frame 10.In addition, the edge light source of the first lamp bar 20a and the edge light source of the second lamp bar 20b are by described below.
At the present embodiment, be described for the lamp bar of the first lamp bar 20a and the second lamp bar 20b two type, but the present invention is not restricted to this, such as, backlight module also can comprise the lamp bar of the third type according to an embodiment of the invention, i.e. the 3rd lamp article; Wherein, the edge light source of the first lamp article 20a, the edge light source of the second lamp article 20b and the 3rd lamp article edge light source with they separately faced by same back of the body frame 10 hang plate 12 outer between distance not identical.
Continue the multiple first light source 22a comprising the first power supply board 21a and interval with reference to Fig. 3, the first lamp bar 20a or be arranged at equal intervals on the first power supply board 21a.Here, the edge light source of the first lamp bar 20a refers to the first light source 22a at the edge (or claiming outermost on the first power supply board 21a) being positioned at the first power supply board 21a.
Multiple secondary light source 22b that second lamp bar 20b comprises the second power supply board 21b and interval or is arranged at equal intervals on the second power supply board 21b.Here, the edge light source of the second lamp bar 20b refers to the secondary light source 22b at the edge (or claiming outermost on the second power supply board 21b) being positioned at the second power supply board 21b.
In the present embodiment, the quantity of the secondary light source 22b that the second lamp bar 20b comprises is less than the quantity of the first light source 22a that the first lamp bar 20a comprises, but the present invention is not restricted to this.Like this, when the first lamp bar 20a and the second lamp bar 20b replaces and is intervally arranged on the base plate 11 carrying on the back frame 10, secondary light source 22b on the first light source 22a on all first lamp bar 20a and all second lamp bar 20b forms unequal-interval arrangement, thus blanking bar appears in the angled portion solved between the hang plate 12 of back of the body frame 10 and base plate 11, thus there is the problem of the dark frame of surrounding and corner blackening.
At the present embodiment, preferably, the first light source 22a and secondary light source 22b is the LED of band lens, but the present invention is not restricted to this.
Continue with reference to Fig. 4, when the first light source 22a and secondary light source 22b is the LED of band lens, the distance between the outer of the hang plate 12 of the edge light source of the distance between the outer of the hang plate 12 of the edge light source of the first lamp bar 20a and the back of the body frame 10 faced by it and the second lamp bar 20b and the back of the body frame 10 faced by it meets formula below.
h1<H/2<h2；
D/5<h2-h1<D；
h1/4<d<2h1/3；
Wherein, h1 represents the distance between the outer of the hang plate 12 of the edge light source of the first lamp bar 20a and the back of the body frame 10 faced by it; H2 represents the distance between the outer of the hang plate 12 of the edge light source of the second lamp bar 20b and the back of the body frame 10 faced by it; H represents the peak width at half height of the LED of described band lens; D represents in backlight module the distance of carrying on the back between the base plate 11 of frame 10 and diffuser plate 30; D represents the projected length of the hang plate 12 of back of the body frame 10 on the base plate 11 of back of the body frame 10, namely carries on the back the outer of the hang plate 12 of frame 10 to the distance in it between edge.
Further, the appearance of the light and shade block phenomenon caused in order to avoid forming unequal-interval arrangement due to the first light source 22a and secondary light source 22b, in the present embodiment, direct type backlight module 1 also comprises shading column 50.In the present embodiment, a shading column 50 is set between the first often adjacent lamp bar 20a and the edge light source of the second lamp bar 20b; Like this, shading column 50 can make light disperse, thus solves the problem of light and shade block phenomenon.
Fig. 5 is the structural representation of liquid crystal display according to an embodiment of the invention.
With reference to Fig. 5, liquid crystal display comprises according to an embodiment of the invention: liquid crystal panel 2 and the direct type backlight module 1 be oppositely arranged with this liquid crystal panel 2; Wherein, direct type backlight module 1 provides uniform area source to liquid crystal panel 2, to make liquid crystal panel 2 by this uniform area source show image.
In sum, according to embodiments of the invention, because the secondary light source on the first light source on the first lamp bar and the second lamp bar forms unequal interval arrangement, the problem of the dark frame of surrounding and the corner blackening occurred because the angled portion carried on the back between the hang plate of frame and base plate occurs blanking bar therefore can be solved.In addition, between the first often adjacent lamp bar and the edge light source of the second lamp bar, a shading column is set, this shading column can make light disperse, thus avoids the appearance of the light and shade block phenomenon caused because the first light source and secondary light source form unequal-interval arrangement.
Although illustrate and describe the present invention with reference to specific embodiment, but it should be appreciated by those skilled in the art that: when not departing from the spirit and scope of the present invention by claim and equivalents thereof, the various changes in form and details can be carried out at this.
Claims (10)
1. a direct type backlight module, is characterized in that, comprising:
Back of the body frame (10), comprise base plate (11) and be arranged on the hang plate (12) at edge of described base plate (11), wherein, described hang plate (12) is obtuse angle with the angle of described base plate (11);
At least two lamp bars, are intervally arranged on described base plate (11), and the distance between the edge light source of each lamp bar and the outer of the hang plate (12) faced by it is all not identical.
2. direct type backlight module according to claim 1, is characterized in that, one of described two lamp bars are the first lamp bar (20a), and another of described two lamp bars is the second lamp bar (20b); Described first lamp bar (20a) and described second lamp bar (20b) are intervally arranged on described base plate (11), and the distance described in the Distance geometry between the described edge light source of the first lamp bar (20a) and the outer of the hang plate (12) faced by it between edge light source of the second lamp bar (20b) and the outer of the hang plate (12) faced by it is not identical.
3. direct type backlight module according to claim 2, it is characterized in that, the distance between the described edge light source of the second lamp bar (20b) and the outer of the hang plate (12) faced by it is greater than the distance between the described edge light source of the first lamp bar (20a) and the outer of the hang plate (12) faced by it.
4. direct type backlight module according to claim 2, is characterized in that,
Described first lamp bar (20a) comprises the first power supply board (21a) and is spaced at multiple first light sources (22a) on described first power supply board (21a); Wherein, the edge light source of the first light source (22a) for described first lamp bar (20a) at described first power supply board (21a) edge is positioned at;
Described second lamp bar (20b) comprises the second power supply board (21b) and is spaced at the multiple secondary light sources (22b) on described second power supply board (21b); Wherein, the edge light source of secondary light source (22b) for described second lamp bar (20b) at described second power supply board (21b) edge is positioned at.
5. direct type backlight module according to claim 4, is characterized in that, the quantity of described secondary light source (22b) is less than the quantity of described first light source (22a).
6. the direct type backlight module according to any one of claim 2 to 5, is characterized in that, described first light source (22a) and/or described secondary light source (22b) are the LED of band lens.
7. direct type backlight module according to claim 6, it is characterized in that, distance described in Distance geometry between the described edge light source of the second lamp bar (20b) and the outer of the hang plate (12) faced by it between the edge light source of the first lamp bar (20a) and the outer of the hang plate (12) faced by it meets formula below
h1<H/2<h2；
D/5<h2-h1<D；
h1/4<d<2h1/3；
Wherein, h1 represents the distance between the described edge light source of the first lamp bar (20a) and the outer of the hang plate (12) faced by it, h2 represents the distance between the described edge light source of the second lamp bar (20b) and the outer of the hang plate (12) faced by it, H represents the peak width at half height of the LED of described band lens, D represents the distance between base plate described in backlight module (11) and diffuser plate, and d represents the projected length of described hang plate (12) on described base plate (11).
8. direct type backlight module according to claim 1, is characterized in that, described direct type backlight module also comprises; Shading column (50), between the edge light source being arranged on adjacent two lamp bars.
9. direct type backlight module according to claim 2, is characterized in that, described direct type backlight module also comprises; Shading column (50), between the edge light source being arranged on the edge light source of described first lamp bar (20a) the described second lamp bar (20b) adjacent with it.
10. a liquid crystal display, is characterized in that, comprises the direct type backlight module described in any one of claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510683064.0A CN105204228B (en) | 2015-10-20 | 2015-10-20 | Direct type backlight module and liquid crystal display |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510683064.0A CN105204228B (en) | 2015-10-20 | 2015-10-20 | Direct type backlight module and liquid crystal display |
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| CN105204228A true CN105204228A (en) | 2015-12-30 |
| CN105204228B CN105204228B (en) | 2019-02-26 |
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| CN201510683064.0A Active CN105204228B (en) | 2015-10-20 | 2015-10-20 | Direct type backlight module and liquid crystal display |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109143687A (en) * | 2018-09-30 | 2019-01-04 | 厦门天马微电子有限公司 | Backlight module, liquid crystal display die set and electronic equipment |
| CN115291432A (en) * | 2022-08-17 | 2022-11-04 | 惠科股份有限公司 | Backlight module and display device |
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| CN202813036U (en) * | 2012-07-10 | 2013-03-20 | Tcl光电科技(惠州)有限公司 | Direct down type backlight module and liquid crystal display device |
| CN203519979U (en) * | 2013-10-31 | 2014-04-02 | 青岛海信电器股份有限公司 | Liquid crystal module and liquid crystal display |
| US20140160749A1 (en) * | 2012-12-11 | 2014-06-12 | Samsung Electronics Co., Ltd. | Lighting device and surface illumination apparatus |
| CN203671404U (en) * | 2014-01-27 | 2014-06-25 | 青岛海信电器股份有限公司 | Direct lighting backlight module and display device |
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| CN101476703A (en) * | 2007-12-31 | 2009-07-08 | 乐金显示有限公司 | Backlight unit |
| CN202813036U (en) * | 2012-07-10 | 2013-03-20 | Tcl光电科技(惠州)有限公司 | Direct down type backlight module and liquid crystal display device |
| US20140160749A1 (en) * | 2012-12-11 | 2014-06-12 | Samsung Electronics Co., Ltd. | Lighting device and surface illumination apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109143687A (en) * | 2018-09-30 | 2019-01-04 | 厦门天马微电子有限公司 | Backlight module, liquid crystal display die set and electronic equipment |
| CN115291432A (en) * | 2022-08-17 | 2022-11-04 | 惠科股份有限公司 | Backlight module and display device |
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| Publication number | Publication date |
|---|---|
| CN105204228B (en) | 2019-02-26 |
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