CN101392875A - LED backlight system - Google Patents
LED backlight system Download PDFInfo
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- CN101392875A CN101392875A CNA2008102248097A CN200810224809A CN101392875A CN 101392875 A CN101392875 A CN 101392875A CN A2008102248097 A CNA2008102248097 A CN A2008102248097A CN 200810224809 A CN200810224809 A CN 200810224809A CN 101392875 A CN101392875 A CN 101392875A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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Abstract
The invention discloses an LED backlight system. The LED backlight system comprises an LED backlight unit which has at least two LEDs for forming a double-color backlight; a temperature sensor unit which is connected with the LED backlight unit and a compensation drive unit to acquire temperature data of the working environment of the LED backlight unit; a system timer unit which is connected with the compensation drive unit to record accumulated working time data of the LED backlight unit; and the compensation drive unit which receives the temperature data and the accumulated working time data to generate compensation data and drive data of the LEDs after decay compensation to drive the LED backlight unit. Thus, the problem of brightness decay of the LED backlight unit due to temperature rise of the working environment and long working period is effectively solved.
Description
Technical field
The present invention relates to a kind of LED-backlit system of display unit, in particular a kind of LED-backlit system that can compensate the brightness of each color LED lamp automatically according to working time and operating ambient temperature.
Background technology
Common liquid crystal indicator is to use cold-cathode fluorescence lamp (CCFL) as back light unit, but cold-cathode fluorescence lamp is considered to the back light unit that need progressively eliminate owing to the mercury pollution problem, light emitting diode (LED) is considered to a kind of extremely promising CCFL substitute backlight, has occurred the liquid crystal indicator of such use light emitting diode (LED) as back light unit at present.
But because the characteristic of LED, the luminous efficiency of LED lamp can change along with the variation of LED operating ambient temperature, and when the operating ambient temperature of LED raise, the luminous efficiency of LED can reduce.The operating temperature of LED lamp is high more, and the brightness decay of LED lamp is big more.The operating ambient temperature of LED-backlit comprises that variations in temperature that the heat of the luminous generation of LED causes, natural environment variations in temperature, LED-backlit system circuit board work heating and all may cause the factor that the LED-backlit operating ambient temperature changes.The reduction of the luminous efficiency of LED lamp can cause the overall brightness decay of LED-backlit, thereby causes using the brightness of the display unit of LED-backlit to reduce.
Fig. 1 is the brightness decay characteristic curve that R, G, B three-color LED light raise with temperature, as can be seen, the temperature variant brightness decay characteristic of the LED of different colours is different, and the brightness decay of red LED is very big, the brightness decay of blue led is very little, and the brightness decay of green LED is bigger.The difference of brightness decay will cause by R, G, B three-color LED mixed luminescence and the color of the LED-backlit that forms is offset, thereby cause using the color of display frame of the display unit of this LED-backlit to be offset.
In addition, the luminous efficiency that it should be noted that the LED lamp can be along with the increase of working time of LED lamp and is decayed, and the reduction of LED luminous efficiency can cause the decay of LED-backlit brightness.The brightness of the LED lamp of different colours attenuation characteristic difference in time, in general, after 1000 hours, 20 milliamperes normal temperature were lighted test, the brightness decay of red LED should be less than 10%, and brightness decay blue, green LED should be less than 15%.The brightness of white led lamps decays the most serious in time, secondly is the blue led lamp, is green LED lamp once more, the brightness of the red LED lamp minimum that decays in time.The inconsistency that R, G, the brightness of B three-color LED light decay in time has a significant impact LED-backlit white balance in the future, and then influences the demonstration fidelity of display unit.The time brightness decay data of R, the G of the LRC of internal authority mechanism (Light ResearchCenter) employing 5mm, SMD encapsulation, R, the G that the B three-color LED light records under the test environment of 20mA constant current and 25 ℃ of constant temperature, B three-color LED light as shown in Figure 2.Along with the working time increase of LED-backlit, the brightness meeting of LED-backlit reduces, and has a strong impact on the stability of LED-backlit overall brightness.With the LED lamp that the technological level of present LED lamp is produced, 1000 hours the light decay of LED lamp of Grade A is about 3%, and the light decay of 50000 hours LED lamps is about 30%, and the brightness decay of high-power LED lamp is more serious.
Brightness decay that the LED-backlit unit raises with operating ambient temperature and the working time increase causes and color offset problem become the key technical problem of restriction LED-backlit development, need be studied this.
Summary of the invention
Technical problem to be solved by this invention provides a kind of LED-backlit system that can compensate brightness automatically according to working time and operating ambient temperature.
Technical scheme of the present invention is as follows:
A kind of LED-backlit system wherein, comprising: the LED-backlit unit, and this back light unit comprises at least two light emitting diodes, to form the backlight of dual base color at least; Temperature sensing unit is connected with LED-backlit unit, compensation drive unit respectively, is used to obtain the operating ambient temperature of LED-backlit unit; The system timing clock unit is connected with compensation drive unit, is used to write down the accumulative total working time data of LED-backlit unit; Compensation drive unit is used to receive temperature data and accumulative total working time data, generates the offset data of each color LEDs, generates driving data behind each light emitting diode attenuation compensation, driving LED back light unit according to offset data.
Described LED-backlit system, wherein, compensation drive unit comprises data processing unit and LED driver element; Temperature sensing unit is connected with the LED driver element by data processing unit respectively with the system timing clock unit; Data processing unit is used to receive temperature data and accumulative total working time data, generates offset data, sends to the LED driver element; The LED driver element is used for according to offset data, generates the driving data behind each light emitting diode attenuation compensation, the driving LED back light unit.
Described LED-backlit system, wherein, compensation drive unit comprises data processing unit and LED driver element; Temperature sensing unit is connected with the LED driver element by data processing unit respectively with the system timing clock unit; Data processing unit is used to receive temperature data and accumulative total working time data, generates offset data, according to offset data, generates the driving data behind each light emitting diode attenuation compensation, sends to the LED driver element; The LED driver element is used for according to the driving data behind the attenuation compensation, the driving LED back light unit.
Described LED-backlit system, wherein, described LED-backlit unit, the independence of each light emitting diode is controlled.
Described LED-backlit system, wherein, the setting of connecting respectively of described LED-backlit unit, the light emitting diode that each color is identical.
Described LED-backlit system, wherein, described LED-backlit unit comprises multi-group light-emitting diode, and each organizes the same color light emitting diode that light emitting diode comprises that respectively several series connection are provided with.
Described LED-backlit system, wherein, described temperature sensing unit comprises five temperature sensors, and one of them temperature sensor places the geometric center position of back light unit, and all the other four place with this temperature sensor is the vertex position of the rectangle at center.
Described LED-backlit system, wherein, described system timing clock unit is real-time timepiece chip or the accurate timer of CPU.
Described LED-backlit system, wherein, described data processing unit is single-chip microcomputer or fpga chip or special-purpose asic chip.
Described LED-backlit system, wherein, the type of drive of described driver element is that constant current driving or constant voltage drive.
Adopt such scheme, the present invention is by adopting LED-backlit brightness automatic temperature-adjusting and time fall-off compensation techniques, homochromy LED in the LED-backlit is adopted identical temperature damping's compensation and identical time attenuation compensation, LED to different colours adopts different temperature damping's compensation and different time attenuation compensations, make the LED-backlit system can adjust the brightness of LED-backlit automatically according to the variation of operating ambient temperature and working time, effectively compensation is because LED-backlit brightness and the color problem of unstable that LED-backlit operating temperature and the variation of working time cause, make the LED-backlit system can in certain operating temperature and working time scope, keep stable brightness and color, thereby improved the brightness of the display unit of using this LED-backlit and the stability of color.
Description of drawings
Fig. 1 is that three-color LED light brightness is with temperature damping's characteristic curve;
Fig. 2 is a three-color LED light brightness attenuation characteristic curve in time;
Fig. 3 is the structural representation of one embodiment of the present invention;
Fig. 4 is the structural representation of one embodiment of the present invention;
Fig. 5 is the arrange schematic diagrames of preferred five temperature sensors in back light unit;
Fig. 6 is the structural representation of temperature sensing unit.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
As shown in Figure 3, the invention provides a kind of LED-backlit system, can carry out attenuation compensation to the brightness of each color LED lamp according to operating ambient temperature and working time; This back light system comprises LED-backlit unit 11, temperature sensing unit 14, system timing clock unit 13 and compensation drive unit 12, this back light unit 11 is made up of a plurality of LED lamps, according to the needs of using the number and the color of LED lamp are selected, to form the backlight of dual base color at least, LED lamp basis changes brightness from the difference of the driving signal of compensation drive unit 12; Temperature sensing unit 14, respectively with LED-backlit unit 11, compensation drive unit 12 is connected, obtain the operating ambient temperature of LED-backlit 11, convert temperature data to data that data processing unit can be accepted, send to compensation drive unit 12, here need to prove, because temperature sensing unit 14 can adopt the different temperatures sensing element, therefore temperature sensing unit 14 can be various ways with the connected mode of back light unit 11, such as the appropriate location that temperature sensitive member can be fixedly connected on back light unit 11, also can adopt the mode of remote sensing thermometric to respond to the appropriate location that is connected back light unit 11; System timing clock unit 13 when LED-backlit is worked to the working time timing of system, and when quitting work, LED-backlit preserves the record of working time, when next LED-backlit is worked, continue timing and keeping records at this moment on the interocclusal record basis, so just realized LED-backlit working time recording occurring continuously.
At every turn when LED-backlit is worked, system timing clock unit 13 will add up the working time data and export to compensation drive unit 12, compensation drive unit 12 is in response to the time data of system timing clock unit 13, the characteristic curve of decaying in time according to the brightness that is preset in the LED modules with different colors lamp in the compensation drive unit 12, generate the time attenuation compensation data of shades of colour LED lamp, and according to the driving data after this time attenuation compensation data generation compensation; Temperature data after temperature sensing unit is handled sends compensation drive unit 12 to, compensation drive unit 12 is in response to temperature data, according to being preset in LED modules with different colors lamp brightness in the data processing unit, generate different temperature damping's offset datas with the attenuation characteristic curve of temperature; Afterwards, compensation drive unit 12 generates the driving data after compensating, driving LED back light unit 11 according to this time attenuation compensation data and temperature damping's offset data.
Wherein, generating different attenuation compensation data according to different attenuation curves is known technology, does not elaborate at this; As substituting of this known technology, also can on temperature damping's characteristic curve and time attenuation characteristic curve, choose discrete a plurality of representative point, be pre-stored in the system memory unit, when arriving this, system mode passes through lookup table mode, find the offset data of specific temperature and time correspondence, system's back light unit is compensated.
Such as, the time attenuation compensation can be selected per 400 hours, per 500 hours or per 800 hours, carries out single compensation; Temperature damping's compensation can select per 4 degrees centigrade, per 5 degrees centigrade or per 6 degrees centigrade to carry out single compensation; Compensation drive unit 12 generalized time attenuation compensation data and temperature damping's offset data obtain the attenuation compensation data, and according to the attenuation compensation data, on the basis of each lamp point driving data of current system, output is through revising later lamp point driving data.
Like this, all realized the attenuation compensation of temperature and time, the brightness and the color that still can be consistent at variations in temperature and the back back light unit that works long hours for the LED lamp of each color.
Embodiment 2
On the basis of embodiment 1, as shown in Figure 4, compensation drive unit 12 comprises data processing unit 15 and LED driver element 16, temperature sensing unit 14 is connected with the LED driver element by data processing unit 15 with system timing clock unit 13, data processing unit 15 receives temperature data and accumulative total working time data, generate temperature damping's offset data and time attenuation compensation data, send to LED driver element 16, LED driver element 16 is according to said temperature attenuation compensation data and time attenuation compensation data, generate each light emitting diode through the driving data behind the attenuation compensation, output drive signal control lamp point.Finish compensation process at LED driver element 16 like this, can reduce the data processing pressure of data processing unit, improve job stability.
Embodiment 3
On the basis of embodiment 1, as shown in Figure 4, compensation drive unit 12 comprises data processing unit 15 and LED driver element 16, temperature sensing unit 14 is connected with the LED driver element by data processing unit 15 with system timing clock unit 13, data processing unit 15 receives temperature data and accumulative total working time data, generate temperature damping's offset data and time attenuation compensation data, integrated temperature attenuation compensation data and time attenuation compensation data, after generating the attenuation compensation data of each color LEDs, by driving data with reference to each light emitting diode in the current system, on this basis, the data of output after overcompensation are given LED driver element 16, and LED driver element 16 is according to this data output drive signal control lamp point brightness.Finish compensation process at data processing unit like this, can reduce LED driver element data processing pressure, improve driveability.
Embodiment 4
On the basis of embodiment 1,2,3, the light emitting diode organizational form of LED-backlit unit is the pointwise control mode, and the brightness of each light emitting diode can independently be controlled.By independent each light emitting diode of control, can obtain better white balance effect.
Embodiment 5
On the basis of embodiment 1,2,3, the light emitting diode organizational form of LED-backlit unit is the series connection control mode, and the light emitting diode of same color is connected on together, and the light emitting diode of different colours is independently controlled.The light emitting diode of the same color that is cascaded by control can be simplified the pcb board wiring, reduces system cost.
Embodiment 6
On the basis of embodiment 1,2,3, the light emitting diode organizational form of LED-backlit unit is the series connection control mode, the light emitting diode string joint group of several same color becomes one group of LED combination, combination can comprise the single color LED of different numbers as required, and each back light unit comprises the LED combination of a plurality of different colours.By forming back light unit by a plurality of LED, can realize the light emitting diode of several same color is independently controlled, obtain better effect backlight.
Embodiment 7
At embodiment 1,2, on 3 the basis, temperature sensing unit comprises Date Conversion Unit and at least one temperature sensor, temperature sensor places back light unit, Date Conversion Unit can convert temperature data to the data that data processing unit can be accepted, as shown in Figure 5 and Figure 6, temperature sensing unit comprises temperature sensor 21, temperature sensor 22, temperature sensor 23, temperature sensor 24 and temperature sensor 25 be totally five temperature sensors, wherein temperature sensor 23 is arranged in the geometric center position of back light unit, all the other four be arranged in temperature sensor 23 around, the temperature data that each temperature sensor obtains is passed to Date Conversion Unit 20, and treated generation temperature data is passed to data processing unit.Like this, can obtain the different temperature data in each position of back light unit, the temperature data that collects is more accurate.
Embodiment 8
On the basis of embodiment 1,2,3, can select for use thermocouple, thermistor temperature sensor, radiation thermometer, fibre optic temperature sensor, quartz temperature sensor or thermal sensitive ceramics temperature sensor as temperature sensor, for sensitivity and the thermotonus characteristic that improves temperature sensor, several sensor combination can also be used.
Embodiment 9
At embodiment 1,2, on 3 the basis, five temperature sensors of temperature sensing unit 14 preferred uses, one of them temperature sensor places the geometric center position of back light unit 11, promptly in mathematics, do not consider " centre of form " position of object quality, it is the vertex position of the rectangle at center that all the other four temperature sensors place with this temperature sensor, as shown in Figure 5, temperature sensor 23 places the center of back light unit 11, temperature sensor 21, temperature sensor 22, temperature sensor 24, it is the vertex position of the rectangle at center that temperature sensor 25 places with temperature sensor 23, the temperature data that collects like this has more representativeness, can reflect the real operating ambient temperature of back light unit exactly.
On the basis of the various embodiments described above, system timing clock unit 13 can use real-time timepiece chip or the accurate timer of CPU to realize clocking capability.
On the basis of the various embodiments described above, data processing unit 15 can use single-chip microcomputer or fpga chip or special-purpose asic chip to realize temperature data and time data processing capacity, realizes data processing function flexibly.
On the basis of the various embodiments described above, the type of drive of LED driver element 16 can drive for constant current, also can use constant voltage to drive, and promptly adopts constant electric current or constant voltage driving LED lamp point, can satisfy the needs of different application environment like this.
Should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and all these improvement and conversion all should belong to the protection domain of claims of the present invention.
Claims (10)
1, a kind of LED-backlit system is characterized in that, comprising:
The LED-backlit unit comprises at least one light emitting diode, is used to form the backlight of dual base color at least;
Temperature sensing unit is connected with LED-backlit unit, compensation drive unit respectively, is used to obtain the temperature data of LED-backlit cell operation environment;
The system timing clock unit is connected with compensation drive unit, is used to write down the accumulative total working time data of LED-backlit unit;
Compensation drive unit is used to receive temperature data and accumulative total working time data, generates offset data, according to offset data, generates the driving data behind each light emitting diode attenuation compensation, the driving LED back light unit.
2, LED-backlit according to claim 1 system is characterized in that compensation drive unit comprises data processing unit and LED driver element;
Temperature sensing unit is connected with the LED driver element by data processing unit respectively with the system timing clock unit;
Data processing unit is used to receive temperature data and accumulative total working time data, generates offset data, sends to the LED driver element;
The LED driver element is used for according to offset data, generates the driving data behind each light emitting diode attenuation compensation, the driving LED back light unit.
3, LED-backlit according to claim 1 system is characterized in that compensation drive unit comprises data processing unit and LED driver element;
Temperature sensing unit is connected with the LED driver element by data processing unit respectively with the system timing clock unit;
Data processing unit is used to receive temperature data and accumulative total working time data, generates offset data, according to offset data, generates the driving data behind each light emitting diode attenuation compensation, sends to the LED driver element;
The LED driver element is used for according to the driving data behind the attenuation compensation, the driving LED back light unit.
4, according to the arbitrary described LED-backlit of claim 1 to 3 system, it is characterized in that, described LED-backlit unit, each light emitting diode is independent controlled.
5, according to the arbitrary described LED-backlit of claim 1 to 3 system, it is characterized in that, in the described LED-backlit unit, the light emitting diode that each color the is identical setting of connecting respectively.
6, according to the arbitrary described LED-backlit of claim 1 to 3 system, it is characterized in that described LED-backlit unit comprises multi-group light-emitting diode, each organizes the same color light emitting diode that light emitting diode comprises that respectively several series connection are provided with.
7, according to the arbitrary described LED-backlit of claim 1 to 3 system, it is characterized in that, described temperature sensing unit comprises five temperature sensors, one of them temperature sensor places the geometric center position of back light unit, and all the other four place with this temperature sensor is the vertex position of the rectangle at center.
8, according to the arbitrary described LED-backlit of claim 1 to 3 system, it is characterized in that described system timing clock unit is real-time timepiece chip or the accurate timer of CPU.
9, according to the arbitrary described LED-backlit of claim 1 to 3 system, it is characterized in that described data processing unit is single-chip microcomputer or fpga chip or special-purpose asic chip.
According to the arbitrary described LED-backlit of claim 1 to 3 system, it is characterized in that 10, the type of drive of described LED driver element is that constant current driving or constant voltage drive.
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| CNA2008102248097A CN101392875A (en) | 2008-10-22 | 2008-10-22 | LED backlight system |
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| CNA2008102248097A CN101392875A (en) | 2008-10-22 | 2008-10-22 | LED backlight system |
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| CN101765272A (en) * | 2010-01-13 | 2010-06-30 | 惠州雷士光电科技有限公司 | LED (light emitting diode) optical attenuation compensating method and realizing circuit thereof |
| CN102122483A (en) * | 2010-12-22 | 2011-07-13 | 利亚德光电股份有限公司 | Method and system for monitoring LED (light-emitting diode) display screen as well as LED display |
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| CN103730090A (en) * | 2014-01-13 | 2014-04-16 | 西北工业大学 | Circuit and method for digital compensation correction of OLED luminous efficiency attenuation |
| CN106693198A (en) * | 2015-12-29 | 2017-05-24 | 深圳市智连众康科技有限公司 | Intelligent hair generation device and intelligent hair generation system |
| CN108877642A (en) * | 2017-05-12 | 2018-11-23 | 京东方科技集团股份有限公司 | Luminescence component, display base plate and display device |
| CN107808632A (en) * | 2017-11-13 | 2018-03-16 | 深圳市华星光电半导体显示技术有限公司 | The compensation method of OLED life time decays and the driving method of OLED display |
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| CN112116894A (en) * | 2019-06-20 | 2020-12-22 | 华为技术有限公司 | Brightness compensation method and device of display panel, display panel and storage medium |
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| CN115273761A (en) * | 2022-08-17 | 2022-11-01 | 海博瑞电子(江苏)有限公司 | LED brightness compensation control method and system of double dot matrix |
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