CN102345801B - Backlight module of liquid crystal display device and control method thereof - Google Patents
Backlight module of liquid crystal display device and control method thereof Download PDFInfo
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- CN102345801B CN102345801B CN201010240853.4A CN201010240853A CN102345801B CN 102345801 B CN102345801 B CN 102345801B CN 201010240853 A CN201010240853 A CN 201010240853A CN 102345801 B CN102345801 B CN 102345801B
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- light source
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Abstract
The invention provides a backlight module of a liquid crystal display device. The backlight module comprises a membrane, a diffusion plate, a reflecting sheet, a plurality of light sources, a power supply and a switch, wherein the light sources comprise at least two groups of light source groups which are arranged at intervals; the switch is used for selectively switching on the light source groups and the power supply; and when the liquid crystal display device requires backlight, at least one light source group is selected for working. In the backlight module of the liquid crystal display device, a plurality of groups of light sources are arranged, so that the brightness of a 3D (three-dimensional) image displayed by the liquid crystal display device is enhanced without shortening the service life of a backlight source; and moreover, when the liquid crystal display device works in a 2D (two-dimensional) display state, the backlight sources take turns to work, so that the service life of the backlight module is prolonged.
Description
Technical field
The present invention relates to lcd technology, relate in particular to backlight module and the control method thereof of liquid crystal indicator.
Background technology
3D liquid crystal indicator (comprising liquid crystal display and LCD TV) be in the system of traditional plane liquid crystal indicator when line bonus or light splitting device (add synchro switch glasses shutter Glasses as left and right image timesharing shows, or polarization spectro array adding polaroid glasses) realize 3D and show.The light source of plane liquid crystal indicator is located in backlight module, and existing plane 3D liquid crystal indicator all uses same light source under 2D or 3D state.With reference to figure 1, for the structured flowchart of the backlight module of available liquid crystal display unit, it comprises Multilayer Film 11, diffuser plate 13, reflector plate 15 and light source 17, in above-mentioned down straight aphototropism mode set, also comprise the element such as drive circuit and power supply, these are all the known technologies of this area, do not enumerate at this.
Because timesharing and light splitting device all can make the 3D output brightness of system significantly decline, thus in existing plane 3D liquid crystal indicator when system line bonus the result of glasses or light splitting device all can cause the 3D rendering of beholder institute perception darker than original 2D image.For example: the image 3D brightness of observing by timesharing glasses is generally about bore hole and watches 30% or lower (depending on transmitance and the make-and-break time ratio of switch glasses LCD panel) of 2D brightness of image, and the image 3D brightness of observing by polaroid glasses is generally about bore hole watches 40% or lower (depending on the optical characteristics of polarization spectro array and polaroid glasses) of 2D brightness of image.
Existing solution is under 3D show state, to improve light source driving power by backlight circuit to increase backlight illumination, to reduce the luminance difference under 3D and 2D show state, the shortcoming of doing is like this to shorten the service life of back light due to the limit load applying.
Summary of the invention
The object of the present invention is to provide a kind of backlight module and control method thereof of liquid crystal indicator, in the backlight module of liquid crystal indicator, provide multiple sets of light sources, to improve the backlight illumination under 3D show state, and the service life of improving backlight module under 2D show state.
Technical scheme of the present invention is as follows:
A kind of backlight module of liquid crystal indicator, comprise: diaphragm, diffuser plate, reflector plate, some light sources and power supply, described backlight module also comprises switch, described light source comprises the light source group that arrange at least two group spaces, described switch is selectively connected light source group and power supply, selects the work of at least one group of light source group in the time that liquid crystal indicator has demand backlight.
The backlight module of described liquid crystal indicator, wherein, the power supply number of described backlight module is identical with the packet count of light source, and the respectively corresponding power supply of each light source group, is selectively connected by described switch.
The backlight module of described liquid crystal indicator, wherein, the switch number of described backlight module is identical with the packet count of light source, and each light source group is selectively connected corresponding power supply by a switch respectively.
The backlight module of described liquid crystal indicator, wherein, the switch number of described backlight module is identical with the packet count of light source, and each light source group is respectively by the described power supply of the selective connection of a switch.
The backlight module of described liquid crystal indicator, wherein, the backlight illumination providing after described arbitrary light source group switches on power all can meet the backlight demand of described liquid crystal indicator under 2D show state.
A control method for the backlight module of liquid crystal indicator, comprises the following steps:
A. judging the show state of liquid crystal indicator, is that 2D show state enters step B, is that 3D show state enters step D;
B. determine the light source group that need to enable;
C. gauge tap is enabled needs light source group and power connection;
D. gauge tap is by light source group and the power connection of specific quantity.
Described control method, wherein, described step B specifically comprises:
B1. judge that whether backlight illumination that arbitrary light source group provides meets the demand backlight of 2D show state, is to enter as step B2, otherwise enters step B3;
B2. in described power pack, select order successively to select one group of light source group of enabling as needs;
B3. the quantity of the required light source group providing while judging the demand backlight that meets 2D show state, the light source group that order selects the light source group of above-mentioned quantity to enable as needs successively in described power pack.
Described control method, wherein, in described step D, the value of described specific quantity is less than or equal to the packet count of light source.
The backlight module of above-mentioned liquid crystal indicator and control method thereof, by being set, multiple sets of light sources improves the brightness that liquid crystal indicator shows 3D rendering, and can not shorten service life of backlight, and in the time that liquid crystal indicator works in 2D show state, can be by making many group backlight wheels change jobs to extend the service life of backlight module.
Brief description of the drawings
Fig. 1 is the structured flowchart of the backlight module of available liquid crystal display unit;
Fig. 2 is the structured flowchart of the backlight module preferred embodiments of liquid crystal indicator of the present invention
Fig. 3 is the flow chart of the control method preferred embodiments of the backlight module of liquid crystal indicator of the present invention.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Light source in backlight module provided by the invention is made up of two groups of independent light sources of controlling, every group of light source can also be opened separately in independent dimming control, one group of independent unlatching of light source or two groups of light sources are opened simultaneously and can be provided the backlight of requirement for liquid crystal indicator, thereby, under 2D show state, only need to open wherein one group of light source and can meet and watch needs, under 3D show state, two groups of light sources are opened simultaneously and can be improved 3D rendering brightness.
With reference to figure 2, the backlight module preferred embodiments of liquid crystal indicator provided by the invention comprises: Multilayer Film 21, diffuser plate 23, reflector plate 25, light source 27, switch 28 and power supply 29, as shown in the figure, described light source 27 is divided into light source group A and the light source group B that arrange two groups of spaces in the present embodiment, described power supply 29 is included as the a-power supply of light source group A power supply and the B-source for light source group B power supply, described switch 28 is two and singly puts switch, is respectively used to selectively connect a-power supply and light source group A and B-source and light source group B.
In the present embodiment, described light source 27 can be that CCFL fluorescent tube can be also LED lamp, by change CCFL fluorescent tube number or LED arranging density can be reached the object that multiple sets of light sources is provided in existing backlight module simultaneously, every group of light source group comprises multiple CCFL fluorescent tubes or LED lamp, and above-mentioned light source group A and light source group B meet the following conditions: 1, arbitrary light source group Shi Junke that works independently meets the backlight requirement of liquid crystal indicator under 2D show state; 2, when two light source groups are worked, only improve backlight illumination simultaneously, do not affect even back degree.
As other embodiment, described switch 28 also can be a double-point double-throw switch, thereby by two groups of light source works of a switch control; Described power supply 29 can be also a power supply that power output is adjustable, can be separately one group of light source power supply, can be also two groups of light source power supplies simultaneously.
For the control mode of switch 28, it can be connected with the processor in liquid crystal indicator, by processor according to receive telecommand gauge tap 28, or after image display status being judged by processor, according to judged result gauge tap 28, certainly, can also directly switch 28 be located on the housing of liquid crystal indicator, by user's manual operation.
With reference to figure 3, the control method of the backlight module of liquid crystal indicator of the present invention comprises the following steps:
S1, judging the show state of liquid crystal indicator, is that 2D show state enters step S2, is that 3D show state enters step S4;
S2, the definite light source group that need to enable;
Light source group and power connection that S3, gauge tap are enabled needs;
S4, gauge tap be equal and power connection by all light source groups.
Below the working condition while mainly having described two groups of light source groups, group number for light source group in the present invention does not limit, as other embodiment, if light source group is many groups, and the work of arbitrary light source group can meet the demand backlight of 2D show state, and the light source group of specific quantity (being not whole light source groups) is worked and can be met the demand backlight of 3D show state simultaneously, now in step S4, be the light source group of connecting specific quantity, and without connecting whole light source groups; And if independent one group of light source group can not meet the demand backlight of 2D show state, also can in step S2, determine the multiple sets of light sources group that needs startup, thereby in step S3, connect the light source group that need to enable to meet the demand backlight of 2D show state.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improvement and conversion all should belong to the protection domain of claims of the present invention.
Claims (3)
1. the control method of the backlight module of a liquid crystal indicator, this backlight module comprises diaphragm, diffuser plate, reflector plate, some light sources, switch and power supply, described light source comprises the light source group that arrange at least two group spaces, described switch carries out selective connection and controls between light source group and power supply, the respectively corresponding power supply of each light source group, it is characterized in that, this control method comprises the following steps:
A. judging the show state of liquid crystal indicator, is that 2D show state enters step B, is that 3D show state enters step D;
B. determine the light source group that need to enable;
C. gauge tap is enabled needs light source group and power connection;
D. gauge tap is by light source group and the power connection of specific quantity.
2. control method according to claim 1, is characterized in that: described step B specifically comprises:
B1. judge that whether backlight illumination that arbitrary light source group provides meets the demand backlight of 2D show state, is to enter step B2, otherwise enters step B3;
B2. in described light source group, order is selected one group of light source group of enabling as needs successively;
B3. the quantity of the required light source group providing while judging the demand backlight that meets 2D show state, the light source group that order selects the light source group of above-mentioned quantity to enable as needs successively in described light source group.
3. control method according to claim 1 and 2, is characterized in that: in described step D, the value of described specific quantity is less than or equal to the packet count of light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010240853.4A CN102345801B (en) | 2010-07-29 | 2010-07-29 | Backlight module of liquid crystal display device and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010240853.4A CN102345801B (en) | 2010-07-29 | 2010-07-29 | Backlight module of liquid crystal display device and control method thereof |
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| Publication Number | Publication Date |
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| CN102345801A CN102345801A (en) | 2012-02-08 |
| CN102345801B true CN102345801B (en) | 2014-10-01 |
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| CN201010240853.4A Expired - Fee Related CN102345801B (en) | 2010-07-29 | 2010-07-29 | Backlight module of liquid crystal display device and control method thereof |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102540494A (en) * | 2012-03-20 | 2012-07-04 | 福建华映显示科技有限公司 | Three-dimensional display device |
| CN102750912B (en) * | 2012-07-13 | 2015-04-08 | 冠捷显示科技（厦门）有限公司 | LED backlight dynamic control device and control method thereof |
| CN104006324A (en) * | 2013-02-25 | 2014-08-27 | 京东方科技集团股份有限公司 | Backlight module and display device comprising same |
| CN105929597B (en) * | 2016-05-20 | 2021-05-25 | 京东方科技集团股份有限公司 | Backlight source and manufacturing method thereof, display substrate, display device and display method thereof |
| CN107179632A (en) * | 2017-07-31 | 2017-09-19 | 厦门天马微电子有限公司 | Backlight module, display module and display device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101749668A (en) * | 2008-12-19 | 2010-06-23 | 京东方科技集团股份有限公司 | Side-light type backlight source and drive method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09282921A (en) * | 1996-04-10 | 1997-10-31 | Canon Inc | Back light device and liquid crystal display device provided with this back light device |
| CN101271201A (en) * | 2007-03-23 | 2008-09-24 | 深圳Tcl工业研究院有限公司 | Optical assembly capable of changing polarized light state and LCD device |
| CN101339321B (en) * | 2007-07-06 | 2010-05-26 | 深圳Tcl工业研究院有限公司 | LCD device |
| JP2009093989A (en) * | 2007-10-11 | 2009-04-30 | Omron Corp | Plane light source apparatus and liquid crystal display device |
| CN101655638B (en) * | 2008-08-19 | 2012-08-22 | Tcl集团股份有限公司 | Liquid crystal display device |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101749668A (en) * | 2008-12-19 | 2010-06-23 | 京东方科技集团股份有限公司 | Side-light type backlight source and drive method thereof |
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