CN102572452A - Method and device for adjusting color temperature of LED (Light Emitting Diode) liquid crystal television - Google Patents
Method and device for adjusting color temperature of LED (Light Emitting Diode) liquid crystal television Download PDFInfo
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- CN102572452A CN102572452A CN2010106022684A CN201010602268A CN102572452A CN 102572452 A CN102572452 A CN 102572452A CN 2010106022684 A CN2010106022684 A CN 2010106022684A CN 201010602268 A CN201010602268 A CN 201010602268A CN 102572452 A CN102572452 A CN 102572452A
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Abstract
The invention provides a method and a device for adjusting a color temperature of an LED (Light Emitting Diode) liquid crystal television. The method includes the steps of: comparing LED accumulative lightening time with a preset RGB (Red, Green, Blue) gain adjustment value corresponding to change curves of LED lightening time color coordinates X-Y, thus obtaining an RGB gain value to be compensated which corresponds to the LED accumulative lightening time; and adjusting the white balance RGB gain of the LED liquid crystal television according to the obtained gain value. The device for adjusting the color temperature of the liquid crystal television comprises a timer, a memory, a comparing unit and a processing unit. According to the method and the device, the RGB gain adjustment value corresponding to the change curves of the LED lightening time color coordinates X-Y is preset and the LED accumulative lightening time is compared with the preset corresponding value, so that the RGB gain value to be compensated is obtained; and then the white balance RGB gain of the LED liquid crystal television is adjusted, so that the color temperature of the LED liquid crystal television is regulated at a constant value and the defect that the image of the LED liquid crystal television becomes blue as time goes on is overcome.
Description
Technical field
The present invention relates to technical field of television sets, relate in particular to a kind of LED liquid crystal TV set colour temperature control method and device thereof.
Background technology
The display screen of LED liquid crystal TV set, its liquid crystal itself are non-luminous, but the light source that provides by the LED-backlit module.LED (Light Emitting Diode, light-emitting diode) is a kind of solid-state semiconductor device, and it can directly be converted into light to electricity, is divided into white light and RGB light, and wherein, mostly white light LEDs is that blue chip adds that yellow fluorescent powder processes.
As time goes on the characteristics of luminescence of LED is, its luminous efficiency can decay gradually, and usually, white light LEDs is in the time of 25000 to 30000 hours, and its luminous efficiency can decay to 50%.In the decay of LED luminous efficiency, the color of LED also has skew.Therefore, along with the passing of LED fluorescent lifetime, the parameter colour temperature that is used to weigh the LED luminous mass also can constantly raise.For the LED LCDs, along with the rising of colour temperature, the color of whole display frame can be partial to blueness, and it is blue that LED liquid crystal TV set image becomes, and watches to the user and has brought influence.
Summary of the invention
For this reason, technical problem to be solved by this invention is: a kind of LED liquid crystal TV set colour temperature control method and device thereof are provided, and to overcome As time goes on, LED liquid crystal TV set image becomes blue drawback.
So, the invention provides a kind of LED liquid crystal TV set colour temperature control method, this method comprises:
The LED accumulative total time of lighting is lighted the corresponding RGB gain-adjusted of time chromaticity coordinates XY change curve value and compares with presetting LED, obtain this LED accumulative total and light the RGB yield value that corresponding needs of time compensate;
According to the RGB yield value of the needs of said acquisition compensation, adjustment LED liquid crystal TV set white balance RGB gain.
The present invention also provides a kind of LED liquid crystal TV set colour temperature adjusting device, and this device comprises:
Timer is used for the LED accumulative total time of lighting is carried out timing;
Memory is used to store the LED that presets and lights the corresponding RGB gain-adjusted value of time chromaticity coordinates XY change curve;
The contrast unit is used for the LED accumulative total time of lighting is lighted the corresponding RGB gain-adjusted of time chromaticity coordinates XY change curve value and compares with presetting LED, obtains the RGB yield value that needs that this LED accumulative total lights the time correspondence compensate;
Processing unit, the RGB yield value that the needs that are used for obtaining according to said contrast unit compensate, adjustment LED liquid crystal TV set white balance RGB gain.
Wherein, said contrast unit places in the LED liquid crystal TV set logic control chip.
Wherein, said processing unit places in the LED liquid crystal TV set signal plate.
LED liquid crystal TV set colour temperature control method according to the invention and device thereof; Light the corresponding RGB gain-adjusted of time chromaticity coordinates XY change curve value through presetting LED; And LED accumulative total lighted the time and the said respective value that presets compares; Obtain this LED accumulative total and light the RGB yield value of corresponding needs compensation of time, according to this RGB yield value adjustment LED liquid crystal TV set white balance RGB gain, make LED liquid crystal TV set colour temperature be fixed on a steady state value again; Overcome As time goes on, LED liquid crystal TV set image becomes blue drawback.
Description of drawings
Fig. 1 is the said LED liquid crystal TV set of the embodiment of the invention colour temperature side of an adjusting schematic flow sheet;
Fig. 2 is the said LED liquid crystal TV set of an embodiment of the invention colour temperature adjusting device structural representation.
Embodiment
Below, describe the present invention in conjunction with accompanying drawing.
Like Fig. 1, present embodiment provides a kind of LED liquid crystal TV set colour temperature control method, and this method comprises:
Here, LED is along with the accumulation of the time of lighting, and it has a chromaticity coordinates XY value change curve, to should curve, corresponding RGB gain-adjusted value can be arranged;
It is thus clear that; Light the corresponding RGB gain-adjusted of time chromaticity coordinates XY change curve value through presetting LED, and LED accumulative total is lighted the time with the said respective value that presets compares, obtain this LED accumulative total and light the RGB yield value that corresponding needs of time compensate; Again according to this RGB yield value adjustment LED liquid crystal TV set white balance RGB gain; Make LED liquid crystal TV set colour temperature be fixed on a steady state value, overcome As time goes on that LED liquid crystal TV set image becomes blue drawback.
As shown in Figure 2, present embodiment also provides a kind of LED liquid crystal TV set colour temperature adjusting device 20, and this device comprises:
In actual design process, contrast unit 23 can place in the LED liquid crystal TV set logic control chip, and processing unit 24 places in the LED liquid crystal TV set signal plate.
In a LED liquid crystal TV set, except that above-mentioned LED liquid crystal TV set colour temperature adjusting device 20, this television set also comprises LED lamp bar 31, is used for providing the LED driver module 32 and the LED LCDs 33 of drive current to LED lamp bar.Wherein, LED driver module 32 is connected between timer 21 and the LED lamp bar, processing unit 24, and promptly LED liquid crystal TV set signal plate is connected with LED LCDs 33.
The LED accumulative total that timer 21 is sent in contrast unit 23 is lighted the LED that presets in time and the memory 22 and is lighted the corresponding RGB gain-adjusted of time chromaticity coordinates XY change curve value and compare; Obtain this LED accumulative total and light the RGB yield value of corresponding needs compensation of time; And the RGB yield value that will compensate offers processing unit 24, so that carry out color temperature correction.
When the LED lamp is lighted; The time that timer 21 accumulative total LED lamps are lighted; Time accumulative total information is offered contrast unit 23, and the RGB gain that needs in the adjustment processing unit 24 is judged according to the preset value of memory 22 the insides in contrast unit 23; The colour temperature that LED LCDs 33 is showed at last can not receive the influence that LED lamp bar optical efficiency can decay in the LED-backlit module, makes colour temperature all the time at a steady state value.
In sum; The said LED liquid crystal TV set of present embodiment colour temperature control method and device thereof; Light the corresponding RGB gain-adjusted of time chromaticity coordinates XY change curve value through presetting LED, and LED accumulative total is lighted the time with the said respective value that presets compares, obtain this LED accumulative total and light the RGB yield value that corresponding needs of time compensate; Again according to this RGB yield value adjustment LED liquid crystal TV set white balance RGB gain; Make LED liquid crystal TV set colour temperature be fixed on a steady state value, overcome As time goes on that LED liquid crystal TV set image becomes blue drawback.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. a LED liquid crystal TV set colour temperature control method is characterized in that, comprising:
The LED accumulative total time of lighting is lighted the corresponding RGB gain-adjusted of time chromaticity coordinates XY change curve value and compares with presetting LED, obtain this LED accumulative total and light the RGB yield value that corresponding needs of time compensate;
According to the RGB yield value of the needs of said acquisition compensation, adjustment LED liquid crystal TV set white balance RGB gain.
2. a LED liquid crystal TV set colour temperature adjusting device is characterized in that, comprising:
Timer is used for the LED accumulative total time of lighting is carried out timing;
Memory is used to store the LED that presets and lights the corresponding RGB gain-adjusted value of time chromaticity coordinates XY change curve;
The contrast unit is used for the LED accumulative total time of lighting is lighted the corresponding RGB gain-adjusted of time chromaticity coordinates XY change curve value and compares with presetting LED, obtains the RGB yield value that needs that this LED accumulative total lights the time correspondence compensate;
Processing unit, the RGB yield value that the needs that are used for obtaining according to said contrast unit compensate, adjustment LED liquid crystal TV set white balance RGB gain.
3. device according to claim 2 is characterized in that, said contrast unit places in the LED liquid crystal TV set logic control chip.
4. device according to claim 2 is characterized in that, said processing unit places in the LED liquid crystal TV set signal plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106022684A CN102572452A (en) | 2010-12-23 | 2010-12-23 | Method and device for adjusting color temperature of LED (Light Emitting Diode) liquid crystal television |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106022684A CN102572452A (en) | 2010-12-23 | 2010-12-23 | Method and device for adjusting color temperature of LED (Light Emitting Diode) liquid crystal television |
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| CN102572452A true CN102572452A (en) | 2012-07-11 |
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| CN2010106022684A Pending CN102572452A (en) | 2010-12-23 | 2010-12-23 | Method and device for adjusting color temperature of LED (Light Emitting Diode) liquid crystal television |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107920241A (en) * | 2017-12-14 | 2018-04-17 | 四川长虹电器股份有限公司 | A kind of LCD TV white balancing treatment method |
| CN110827769A (en) * | 2019-11-12 | 2020-02-21 | 昆山龙腾光电股份有限公司 | Adaptation device and display device |
| CN111443761A (en) * | 2019-10-24 | 2020-07-24 | 泰州悦诚科技信息咨询中心 | Rear panel retraction control system and method |
| WO2022116291A1 (en) * | 2020-12-02 | 2022-06-09 | Tcl华星光电技术有限公司 | White balance adjustment method and liquid crystal display |
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| CN1607570A (en) * | 2003-10-15 | 2005-04-20 | 三星Sdi株式会社 | Panel drive method and apparatus |
| CN1621901A (en) * | 2004-12-13 | 2005-06-01 | 友达光电股份有限公司 | Automatic color compensate control apparatus and process |
| JP2007156157A (en) * | 2005-12-06 | 2007-06-21 | Sharp Corp | Apparatus for adjusting image quality, display apparatus, and method for adjusting image quality |
| CN101620820A (en) * | 2008-06-30 | 2010-01-06 | 株式会社东芝 | Method and apparatus for regenerating video |
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2010
- 2010-12-23 CN CN2010106022684A patent/CN102572452A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1607570A (en) * | 2003-10-15 | 2005-04-20 | 三星Sdi株式会社 | Panel drive method and apparatus |
| CN1621901A (en) * | 2004-12-13 | 2005-06-01 | 友达光电股份有限公司 | Automatic color compensate control apparatus and process |
| JP2007156157A (en) * | 2005-12-06 | 2007-06-21 | Sharp Corp | Apparatus for adjusting image quality, display apparatus, and method for adjusting image quality |
| CN101620820A (en) * | 2008-06-30 | 2010-01-06 | 株式会社东芝 | Method and apparatus for regenerating video |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107920241A (en) * | 2017-12-14 | 2018-04-17 | 四川长虹电器股份有限公司 | A kind of LCD TV white balancing treatment method |
| CN107920241B (en) * | 2017-12-14 | 2020-04-28 | 四川长虹电器股份有限公司 | White balance processing method for liquid crystal display television |
| CN111443761A (en) * | 2019-10-24 | 2020-07-24 | 泰州悦诚科技信息咨询中心 | Rear panel retraction control system and method |
| CN110827769A (en) * | 2019-11-12 | 2020-02-21 | 昆山龙腾光电股份有限公司 | Adaptation device and display device |
| WO2022116291A1 (en) * | 2020-12-02 | 2022-06-09 | Tcl华星光电技术有限公司 | White balance adjustment method and liquid crystal display |
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Application publication date: 20120711 |