CN102111930B - LED color drift adjusting method and device and LCD display panel - Google Patents
LED color drift adjusting method and device and LCD display panel Download PDFInfo
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- CN102111930B CN102111930B CN200910238844.9A CN200910238844A CN102111930B CN 102111930 B CN102111930 B CN 102111930B CN 200910238844 A CN200910238844 A CN 200910238844A CN 102111930 B CN102111930 B CN 102111930B
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Abstract
The invention is suitable for the field of liquid crystal display, and provides a light-emitting diode (LED) color drift adjusting method, an LED color drift adjusting device and a liquid crystal display (LCD) display panel. The method comprises the following steps of: configuring luminosity of all LEDs into the set luminance, wherein the set luminance is smaller than the maximal luminance of the LEDs; acquiring a luminance attenuation value of the current LED according to initial luminance data and current luminance data of the current LED before calibration; judging whether the luminance attenuation value of the current LED exceeds a set threshold value; adjusting the luminance data of the current LED until the luminance attenuation value of the current LED is located within the range of the set threshold value when the luminance attenuation value of the current LED exceeds the set threshold value; and replacing the initial luminance configuration parameter of the current LED by the calibrated luminance configuration parameter. Through the invention, the luminosity of the backlight LED is automatically adjusted, the normal use for users is not influenced.
Description
Technical field
The invention belongs to field of liquid crystal display, relate in particular to a kind of LED color drift method of adjustment, device and LCD display floater.
Background technology
At present, mainly there is the problems such as luminous efficiency is on the low side, heat radiation is difficult for solving, power consumption is higher, the color drift characteristic of LED using LED as backlight.Along with the improvement of LED production technology, three problems are solved just gradually above, but the color drift characteristic of LED is not solved on the self character of device, the main mode that adopts compensation solves, but most of LED is pent in the process of compensation calibration, will interrupt the normal use of TV.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of LED color drift method of adjustment, can not affect the color drift characteristic of automatically adjusting LED in the situation that TV is normal being used.
The embodiment of the present invention is achieved in that a kind of LED color drift method of adjustment, and described method comprises the steps:
Configure the luminosity of all LED to setting brightness, described setting brightness is less than the high-high brightness of LED;
Before calibration, close separately each LED, in the time closing n LED, measure its original intensity data; When calibration, close separately each LED, in the time closing n LED, measure its current brightness data, according to the described original intensity data of current LED and described current brightness data, obtain the brightness decay value of current LED, wherein, n=1～N, the sum that N is LED;
Whether the brightness decay value that judges current LED exceeds setting threshold;
In the time that the brightness decay value of current LED exceeds setting threshold, adjust the brightness data of current LED, until the brightness decay value of current LED is positioned at setting threshold scope;
By the initial luminous configuration parameter replacement of current LED be calibration after luminous configuration parameter.
Another object of the embodiment of the present invention is to provide a kind of LED color drift adjusting device, and described device comprises the steps:
LED luminosity dispensing unit, arrives setting brightness for configuring the luminosity of all LED, and described setting brightness is less than the high-high brightness of LED;
Initial luminous configuration parameter storage unit, for storing the initial luminous configuration parameter of LED;
Brightness decay threshold value dispensing unit, for configuring the brightness decay value of LED;
Brightness decay value computing unit, for close separately each LED before calibration, in the time closing n LED, measure its original intensity data, and close separately each LED in when calibration, in the time closing n LED, measure its current brightness data, according to the original intensity data of current LED and current brightness data, obtain the brightness decay value of current LED, wherein, n=1～N, the sum that N is LED;
Whether brightness decay value judging unit, exceed setting threshold for the brightness decay value that judges current LED;
Luminous configuration parameter adjustment unit, for in the time that the brightness decay value of current LED exceeds setting threshold, adjust the brightness data of current LED, until the brightness decay value of current LED is positioned at setting threshold scope, upgrade described initial luminous configuration parameter storage unit, by the initial luminous configuration parameter replacement of current LED be calibration after luminous configuration parameter.
Another object of the embodiment of the present invention is to provide a kind of LCD display floater of above-mentioned LED color drift adjusting device.
The embodiment of the present invention regulates the luminosity of backlight LED automatically, occurs that brightness decay appears in LED, carries out luminance compensation, solves the color drift characteristic issues of LED, and luminance compensation automatically performs the normal use that does not affect user.
Accompanying drawing explanation
Fig. 1 is the realization flow figure of the LED color drift method of adjustment that provides of first embodiment of the invention;
Fig. 2 is the realization flow figure of the LED color drift method of adjustment that provides of second embodiment of the invention;
Fig. 3 is the structure chart of the LCD display floater that provides of the embodiment of the present invention;
Fig. 4 is the structure chart of the LED color drift adjusting device that provides of the embodiment of the present invention.
Embodiment
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.
In embodiments of the present invention, automatically regulate the luminosity of backlight LED, occur that brightness decay appears in LED, carry out luminance compensation, solve the color drift characteristic issues of LED.
Fig. 1 shows the realization flow of the LED color drift method of adjustment that first embodiment of the invention provides, and details are as follows:
In step S101, configure the luminosity of all LED to setting brightness;
In embodiments of the present invention, setting the high-high brightness that brightness is less than LED, for example, is 80% of high-high brightness.
In step S102, when calibration, according to the original intensity data of current LED and current brightness data, obtain the brightness decay value of current LED;
In step S103, judge whether the brightness decay value of current LED exceeds setting threshold, be to perform step S104, otherwise execution step S105;
In step S104, adjust the brightness data of current LED, and return to execution step S103 and continue judgement;
In step S105, by the initial luminous configuration parameter replacement of current LED be calibration after luminous configuration parameter.
In embodiments of the present invention, in order to obtain LED brightness decay value, carry out periodic calibration to the brightness of whole LED, therefore need to arrange the calibration cycle of LED color drift.
Fig. 2 shows the realization flow of the LED color drift method of adjustment that second embodiment of the invention provides, and details are as follows:
In step S201, the luminosity that configures all LED is to setting brightness, and for example 80% of LED high-high brightness, adjust the luminous configuration parameter of LED, make backlight module meet brightness and inhomogeneity index request;
In step S202, close respectively separately each LED, in closing n LED, measure its original intensity data L '
n1;
Wherein, L '
n1=L
a1-L
n1, L
a1for the initial overall brightness data of LED, L
n1be after n LED closes, the initial total brightness data of residue LED.
In step S203, when calibration, close separately each LED, in closing n LED, measure its current brightness data L '
n2;
Wherein, L '
n2=L
a2-L
n2, L
a2for the overall brightness data of current LED, L
n2be after n LED closes, the current total brightness data of residue LED.
In step S204, calculate the brightness decay value L of n LED
n Δ=L '
n1-L '
n2;
In step S205, judge L
n Δwhether exceeding setting threshold, is to perform step S206, otherwise finishes;
In step S206, adjust the brightness of n LED, and return to execution step S205;
In step S207, by the initial luminous configuration parameter replacement of n LED be calibration after luminous configuration parameter.
In above-mentioned flow process, n=1～N, the sum that N is LED.
Fig. 3 illustrates the structure of the LCD display floater that the embodiment of the present invention provides, and for convenience of explanation, only shows the part relevant to the embodiment of the present invention.
LED color drift adjusting device 1 is controlled the configuration parameters such as LED luminosity is set, and processor 2 communicates with color/luminance sensor 4, obtains color/brightness data information.LED drive circuit 3 is luminous according to configuration parameter driving LED such as LED luminosity.
In embodiments of the present invention, each LED can be by LED drive circuit 3 drive.
Generally the brightness of LED always decays along with the variation of time, guarantee that in a period of time, the brightness of backlight module does not change, LED can not be operated in high-high brightness the most at the beginning, 80% of the high-high brightness of for example working, certain brightness now must be consistent with the brightness of designing requirement substantially.Like this when the brightness of LED has produced decay, only need to increase its brightness just passable.
The embodiment of the present invention is mainly used for calibrating the brightness of the LED that each (group) can independently control, in the case of having guaranteed that the brightness of each (group) LED is constant, can guarantee its uniformity and overall brightness and initial state consistency.
In embodiments of the present invention, LED color drift adjusting device 1 is less than high-high brightness by processor 2 by the luminosity configuration of all LED, and 80% steady operation of for example high-high brightness, measures the uniformity of backlight 5 by external instrument.Then, adjust by processor 2 the luminous configuration parameter of LED that does not meet uniformity and brightness requirement, finally make the brightness of whole backlight module and uniformity touch the mark.LED color drift adjusting device 1 records the luminous configuration parameter of each LED, as the luminous configuration parameter list of initial LED.
In the time of calibration, processor 2 makes whole backlight module be operated in a normal stable state according to initial luminous configuration parameter list control LED drive circuit 3.
The current overall brightness data L of LED controlled color/luminance sensor 4 and measured by LED color drift adjusting device 1 by processor 2
a2.Then, configuration LED drive circuit 3 is closed separately each LED.Meanwhile, LED color drift adjusting device 1 carries out brightness measurement by processor 2 at every turn in cutting out LED, obtains remaining the current brightness total data L of LED
n2, L '
n2=L
a2-L
n2be exactly the current brightness data of n LED, n=1～N, the sum that N is LED.
Then, LED color drift adjusting device 1 is by L '
n2with the L ' in initial LED brightness data table
n1compare, if find brightness decay value L
n Δ=L '
n1-L '
n2, exceed setting threshold, assert that the brightness of n LED need to be calibrated, adjust the luminous configuration parameter of this LED, make it brightness and change, until L
n Δtill meeting setting threshold, the luminous configuration parameter of LED after record calibration is in the luminous configuration parameter list of initial LED and replace original data.
Fig. 4 shows the structure of the LED color drift adjusting device that the embodiment of the present invention provides, and for convenience of description, only shows the part relevant to the embodiment of the present invention.
LED luminosity dispensing unit 11 configures the luminosity of all LED to setting brightness, in embodiments of the present invention, sets the high-high brightness that brightness is less than LED, 80% of for example high-high brightness.
Initial luminous configuration parameter storage unit 12 is stored the initial luminous configuration parameter of LED.
Brightness decay threshold value dispensing unit 13 configures the brightness decay value of LED.
When calibration, brightness decay value computing unit 14, according to the original intensity data of current LED and current brightness data, obtains the brightness decay value of current LED.
Brightness decay value judging unit 15 judges whether the brightness decay value of current LED exceeds setting threshold, in the time that brightness decay value judging unit 15 judges that the brightness decay value of current LED exceeds setting threshold, the brightness data of current LED is adjusted in luminous configuration parameter adjustment unit 16, until the brightness decay value of current LED is positioned at setting threshold scope, upgrade initial luminous configuration parameter storage unit 12, by the initial luminous configuration parameter replacement of current LED be calibration after luminous configuration parameter.
As one embodiment of the present of invention, in order to obtain LED brightness decay value, carry out periodic calibration to the brightness of whole LED, therefore the calibration cycle of LED color drift can be set by calibration cycle dispensing unit 17.
In embodiments of the present invention, the brightness decay value L of LED
n Δ=L '
n1-L '
n2, wherein, L '
n1=L
a1-L
n1, L
a1for the initial overall brightness data of LED, L
n1be after n LED closes, the initial total brightness data of residue LED; L '
n2=L
a2-L
n2, L
a2for the overall brightness data of current LED, L
n2be after n LED closes, the current total brightness data of residue LED; N=1～N, the sum that N is LED.
The embodiment of the present invention regulates the luminosity of backlight LED automatically, occurs that brightness decay appears in LED, carries out luminance compensation, solves the color drift characteristic issues of LED, and luminance compensation automatically performs the normal use that does not affect user.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. a LED color drift method of adjustment, is characterized in that, described method comprises the steps:
Configure the luminosity of all LED to setting brightness, described setting brightness is less than the high-high brightness of LED;
Before calibration, close separately each LED, in the time closing n LED, measure its original intensity data; When calibration, close separately each LED, in the time closing n LED, measure its current brightness data, according to the described original intensity data of current LED and described current brightness data, obtain the brightness decay value of current LED, wherein, n=1～N, the sum that N is LED;
Whether the brightness decay value that judges current LED exceeds setting threshold;
In the time that the brightness decay value of current LED exceeds setting threshold, adjust the brightness data of current LED, until the brightness decay value of current LED is positioned at setting threshold scope; By the initial luminous configuration parameter replacement of current LED be calibration after luminous configuration parameter.
2. the method for claim 1, is characterized in that, closes separately each LED before described calibration, in the time closing n LED, measures its original intensity data; When calibration, close separately each LED, in the time closing n LED, measure its current brightness data, according to the original intensity data of current LED and current brightness data, the step of obtaining the brightness decay value of current LED is specially:
Close separately each LED, in the time closing n LED, measure its original intensity data
;
When calibration, close separately each LED, in the time closing n LED, measure its current brightness data L '
n2;
Calculate the brightness decay value L of n LED
n △=L '
n1-L '
n2;
Wherein,
, L
a1for the initial overall brightness data of LED, L
n1be after n LED closes, the initial total brightness data of residue LED;
N=1～N, the sum that N is LED.
3. the method for claim 1, is characterized in that, described method further comprises the steps:
The color drift calibration cycle of configuration LED.
4. a LED color drift adjusting device, is characterized in that, described device comprises:
LED luminosity dispensing unit, arrives setting brightness for configuring the luminosity of all LED, and described setting brightness is less than the high-high brightness of LED;
Initial luminous configuration parameter storage unit, for storing the initial luminous configuration parameter of LED;
Brightness decay threshold value dispensing unit, for configuring the brightness decay value of LED;
Brightness decay value computing unit, for close separately each LED before calibration, in the time closing n LED, measure its original intensity data, and close separately each LED in when calibration, in the time closing n LED, measure its current brightness data, according to the original intensity data of current LED and current brightness data, obtain the brightness decay value of current LED, wherein, n=1～N, the sum that N is LED;
Whether brightness decay value judging unit, exceed setting threshold for the brightness decay value that judges current LED;
Luminous configuration parameter adjustment unit, for in the time that the brightness decay value of current LED exceeds setting threshold, adjust the brightness data of current LED, until the brightness decay value of current LED is positioned at setting threshold scope, upgrade described initial luminous configuration parameter storage unit, by the initial luminous configuration parameter replacement of current LED be calibration after luminous configuration parameter.
5. device as claimed in claim 4, is characterized in that, the brightness decay value L of described LED
n △=L '
n1-L '
n2, wherein,
N=1～N, the sum that N is LED.
6. device as claimed in claim 4, is characterized in that, described device also comprises:
Calibration cycle dispensing unit, for configuring the color drift calibration cycle of LED.
7. the LCD display floater of a LED color drift adjusting device that comprises any one in claim 4-6.
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| CN200910238844.9A CN102111930B (en) | 2009-12-28 | 2009-12-28 | LED color drift adjusting method and device and LCD display panel |
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| CN102866568B (en) * | 2012-10-24 | 2015-03-25 | 广东威创视讯科技股份有限公司 | Method and device for adjusting brightness of projector |
| CN102928759A (en) * | 2012-10-24 | 2013-02-13 | 广东威创视讯科技股份有限公司 | LED (Light-Emitting Diode) projector light source detection method and LED projector |
| CN107884988B (en) * | 2017-10-25 | 2020-05-12 | 信利半导体有限公司 | Method for improving color drift of white light OLED |
| CN112911162B (en) * | 2021-01-19 | 2022-05-31 | 佛山市顺德区美的洗涤电器制造有限公司 | Light supplementing method and device for dish washing machine and dish washing machine |
| CN112890714A (en) * | 2021-01-19 | 2021-06-04 | 佛山市顺德区美的洗涤电器制造有限公司 | Light supplementing method and device for dish washing machine and dish washing machine |
| CN113115011B (en) * | 2021-04-14 | 2021-12-10 | 深圳市和天创科技有限公司 | Intelligent control method and system for light source of projector |
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