CN101192362A - LEDLED display screen on site single-point calibration device and its method - Google Patents
LEDLED display screen on site single-point calibration device and its method Download PDFInfo
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Abstract
The invention relates to an on-site single-point alignment device for LED display screen and the alignment method. The device consists of a video signal source, a main control box, an LED display screen and a photoelectric probe and the video signal source is connected with the main control box. The main control box comprises an LED driving controller, a memory bank and a read-write controller and the main control box is connected with the LED display screen. The LED driving controller is connected with the read-write controller and the read-write controller is connected with the memory bank and is connected with the photoelectric probe. When the device is used for alignment, the test alignment before the work is first carried out and the LED display screen signal to be aligned is modified, read and stored through the read-write controller, and then the work alignment is carried out. The device reads the storage information to which the test alignment is applied and then the storage information is delivered into the LED display screen by the LED driving controller. The invention can deliver high correction accuracy and can be used for the on-site correction, thereby delivering convenience for the operation.
Description
Technical field
The invention belongs to LED display display technique field, refer to on-the-spot single-point calibration apparatus of a kind of LED display and adjusting process thereof especially.
Background technology
LED module or display screen need be done adjustment based on following factors:
1, in the LED production run, the brightness of each LED is all different.
2, in use, the brightness of LED is because of time factor deterioration, decline.
The LED display calibration apparatus can be divided into two big classes: a class is the method for taking pictures, and another kind of is the pointwise photoelectric detection method.The method of taking pictures adjustment speed is fast but precision is lower, the slow but precision height of pointwise photoelectric detection method adjustment speed, and under the situation of time abundance, pointwise photoelectric detection method tool has great advantage.
Summary of the invention
The purpose of this invention is to provide on-the-spot single-point calibration apparatus of a kind of LED display and adjusting process thereof, solve the problems referred to above.
To achieve these goals, technical solution of the present invention is: the on-the-spot single-point calibration apparatus of a kind of LED display, this device is made up of video signal source, Main Control Tank, LED display and photoelectric probe, video signal source is connected with Main Control Tank, Main Control Tank comprises LED driving governor and memory bank, Main Control Tank is connected with LED display, wherein Main Control Tank also comprises read-write controller, the LED driving governor is connected with read-write controller, read-write controller is connected with memory bank, and this read-write controller is connected with photoelectric probe.
The on-the-spot single-point calibration apparatus of described LED display, wherein read-write controller is made up of correction data circuit, two-way choice device, write signal generator, read signal generator and alternative selector switch, the correction data circuit is connected with the two-way choice device, the two-way choice device is connected with write signal generator, read signal generator and alternative selector switch respectively, and write signal generator, read signal generator are connected with the alternative selector switch respectively.
The on-the-spot single-point calibration apparatus of described LED display, wherein two kinds of patterns are arranged is test pattern and mode of operation to read-write controller.
The on-the-spot single-point calibration apparatus of described LED display, wherein the LED driving governor produces mode select signal Mode, and when Mode was logic high, read-write controller was in mode of operation; When Mode was logic low, read-write controller was in test pattern.
The on-the-spot single-point adjusting process of a kind of LED display, this method may further comprise the steps:
(1) at first to carrying out on-the-spot adjustment before the LED display work, this moment, read-write controller was in test pattern, video signal source produces the standard testing vision signal, signal is sent into the LED driving governor, the LED display pointwise is lighted, obtain the bright point information Data_LED of LED display by the photoelectric probe pointwise after, it is sent into the correction data circuit of read-write controller, relatively produce correction data Data_cr in the back with set expectation value, these data input to memory bank through two-way choice device output Data_out;
(2) the LED driving governor produces the position Addr_in of current bright spot, send into the write signal generator, produce write command signal Comm_wr and writing address signal Addr_wr, send into memory bank through alternative selector switch generation corresponding signal Comm_out and Addr_out, appropriate address deposits correction data in memory bank;
Carry out adjustment when (3) again LED display being worked, this moment, read-write controller was in mode of operation, the LED driving governor produces the LED address information Addr_in that will show one by one, send into the read signal generator in the read-write controller, produce read command signal Comm_rd and read address signal Addr_rd, send into memory bank through alternative selector switch generation corresponding signal Comm_out and Addr_out, read correction data Data_out at appropriate address, be communicated with Data_in through the two-way choice device, send into the LED driving governor, one by one current point has been carried out the gradation data correction, with the brightness of the LED in the Data Control screen body after proofreading and correct.
The on-the-spot single-point adjusting process of described LED display, wherein LED display is lighted by the look pointwise, and promptly vision signal send the danger signal pointwise to light earlier, then send the green pointwise to light, send the blue signal pointwise to light at last, the vision signal gray-scale value is got maximal value 255.
After adopting such scheme, the present invention has the following advantages:
1, adopt photoelectric probe to measure LED brightness value precision height, the effect after the correction is good.
But 2, the present invention's execute-in-place need not to transport back factory after long-time the use, and is convenient and strength-saving.
Description of drawings
Fig. 1 is a calibration apparatus structural representation of the present invention;
Fig. 2 is the inner schematic diagram of read-write controller of the present invention.
Embodiment
As shown in Figure 1, the on-the-spot single-point calibration apparatus of LED display of the present invention is made up of video signal source 1, Main Control Tank 2, photoelectric probe 3 and LED display 4, video signal source 1 is connected with Main Control Tank 2, Main Control Tank 2 comprises LED driving governor 21, read-write controller 22, with memory bank 23, Main Control Tank 2 is connected with LED display 4, and LED driving governor 21 is connected with read-write controller 22, read-write controller 22 is connected with memory bank 23, and this read-write controller 2 is connected with photoelectric probe 3.
Read-write controller 22 is made up of correction data circuit 221, two-way choice device 222, write signal generator 223, read signal generator 224 and alternative selector switch 225, correction data circuit 221 is connected with two-way choice device 222, two-way choice device 222 is connected with write signal generator 223, read signal generator 224 and alternative selector switch 225 respectively, and write signal generator 223, read signal generator 224 are connected with alternative selector switch 225 respectively.
It is test pattern and mode of operation that read-write controller 22 has two kinds of patterns.
The on-the-spot single-point calibration apparatus of LED display, its LED driving governor 21 produces mode select signal Mode, and when Mode was logic high, read-write controller 22 was in mode of operation; When Mode was logic low, read-write controller was in test pattern.
The principle of work of this device is summarized as follows:
Video signal source 1 produces the standard testing vision signal, sends into LED driving governor 21, and LED display 4 is lighted by the look pointwise, and promptly vision signal is sent danger signal earlier, and pointwise is lighted, and then send green, and pointwise is lighted, and send blue signal at last, and pointwise is lighted.The vision signal gray-scale value is got maximal value 255.Lighting order from left to right, from top to bottom, also can be other order, and video signal source 1, LED driving governor 2 and LED display 4 belong to prior art, are omitted herein.
Read-write controller 22 is gordian techniquies of the present invention, its circuit theory diagrams as shown in Figure 2, below respectively with regard to two kinds of pattern introductions of read-write controller 22:
When being in the TEST test pattern, video signal source 1 produces the standard testing vision signal, send into LED driving governor 21, LED display 4 is lighted by the look pointwise, obtain the monochrome information Data_LED of LED by photoelectric probe 3 pointwises, send into the correction data circuit 221 in the read-write controller 22, relatively produce correction data Data_cr in the back with expectation value, choosing of expectation value is very crucial, too smallly makes the brightness of screen body on the low side, it is not obvious to cross ambassador's calibration result, lean on experience.When being in the TEST pattern, the data flow direction of two-way choice device 222 is Data_cr---＞Data_out, and promptly correction data writes memory bank 23.LED driving governor 21 produces the current positional information Addr_in that lights LED, send into the write signal generator 223 in the read-write controller 22, produce write command signal Comm_wr and writing address signal Addr_wr, produce corresponding signal Comm_out and Addr_out through alternative selector switch 225, send into memory bank 23, deposit correction data at appropriate address, read during in order to the WORK pattern.Generally speaking, if expectation value obtains rationally, 4 of the LED display of a new production need to proofread and correct once, after the use for many years, if the brightness uniformity variation of screen body can be carried out second-order correction in the scene.After the TEST pattern is obtained correction data, after this need not photoelectric probe 3.
When being in the WORK pattern, LED driving governor 21 produces the LED address information Addr_in that will show one by one, send into the read signal generator 224 in the read-write controller 22, produce read command signal Comm_rd and read address signal Addr_rd, produce corresponding signal Comm_out and Addr_out through alternative selector switch 225, send into memory bank 23, read correction data Data_out at appropriate address, be communicated with Data_in through two-way choice device 222, send into LED driving governor 21, one by one current point is carried out gradation data and proofread and correct, with the brightness of LED in the Data Control screen body after proofreading and correct, brightness uniformity obviously improves.
Because photoelectric probe 3 is measured the measured value of LED brightness, precision is obtained the precision of LED brightness value apparently higher than the method for taking pictures, so calibration result of the present invention is apparently higher than the calibration result of the method for taking pictures, but while execute-in-place, LED screen after the use several years need not to transport back factory, but straightened up in place.Timing for fear of the influence of surround lighting, should carry out at dark place or night.
Claims (6)
1. the on-the-spot single-point calibration apparatus of a LED display, this device is made up of video signal source, Main Control Tank, LED display and photoelectric probe, video signal source is connected with Main Control Tank, Main Control Tank comprises LED driving governor and memory bank, Main Control Tank is connected with LED display, it is characterized in that: this Main Control Tank also comprises read-write controller, and the LED driving governor is connected with read-write controller, read-write controller is connected with memory bank, and this read-write controller is connected with photoelectric probe.
2. the on-the-spot single-point calibration apparatus of LED display as claimed in claim 1, it is characterized in that: described read-write controller is made up of correction data circuit, two-way choice device, write signal generator, read signal generator and alternative selector switch, the correction data circuit is connected with the two-way choice device, the two-way choice device is connected with write signal generator, read signal generator and alternative selector switch respectively, and write signal generator, read signal generator are connected with the alternative selector switch respectively.
3. the on-the-spot single-point calibration apparatus of LED display as claimed in claim 2, it is characterized in that: it is test pattern and mode of operation that above-mentioned read-write controller has two kinds of patterns.
4. the on-the-spot single-point calibration apparatus of LED display as claimed in claim 3, it is characterized in that: the LED driving governor produces mode select signal Mode, and when Mode was logic high, read-write controller was in mode of operation; When Mode was logic low, read-write controller was in test pattern.
5. the on-the-spot single-point adjusting process of a LED display, it is characterized in that: this method may further comprise the steps:
(1) at first to carrying out adjustment before the LED display work, this moment, read-write controller was in test pattern, video signal source produces the standard testing vision signal, signal is sent into the LED driving governor, the LED display pointwise is lighted, obtain the bright point information Data_LED of LED display by the photoelectric probe pointwise after, it is sent into the correction data circuit of read-write controller, relatively produce correction data Data_cr in the back with set expectation value, these data input to memory bank through two-way choice device output Data_out;
(2) the LED driving governor produces the position Addr_in of current bright spot, send into the write signal generator, produce write command signal Comm_wr and writing address signal Addr_wr, send into memory bank through alternative selector switch generation corresponding signal Comm_out and Addr_out, appropriate address deposits correction data in memory bank;
Carry out adjustment when (3) again LED display being worked, this moment, read-write controller was in mode of operation, the LED driving governor produces the LED address information Addr_in that will show one by one, send into the read signal generator in the read-write controller, produce read command signal Comm_rd and read address signal Addr_rd, send into memory bank through alternative selector switch generation corresponding signal Comm_out and Addr_out, read correction data Data_out at appropriate address, be communicated with Data_in through the two-way choice device, send into the LED driving governor, one by one current point has been carried out the gradation data correction, with the brightness of the LED in the Data Control screen body after proofreading and correct.
6. the on-the-spot single-point adjusting process of LED display as claimed in claim 1, it is characterized in that: LED display is lighted by the look pointwise, be that vision signal send the danger signal pointwise to light earlier, then send the green pointwise to light, send the blue signal pointwise to light at last, the vision signal gray-scale value is got maximal value 255.
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| CN101719363A (en) * | 2009-11-23 | 2010-06-02 | 康佳集团股份有限公司 | Luminance uniformity adjusting method and system of displayer |
| CN101895770A (en) * | 2010-07-09 | 2010-11-24 | 中国科学院长春光学精密机械与物理研究所 | Uniformity correcting method for separating brightness and chromaticity of LED display screen |
| CN101950515A (en) * | 2010-08-20 | 2011-01-19 | 深圳市中庆微科技开发有限公司 | Master-slave point-by-point correcting method for LED display screen |
| CN102005183A (en) * | 2010-12-06 | 2011-04-06 | 深圳市中庆微科技开发有限公司 | Automatic point-to-point adjustment and control system |
| CN102290029A (en) * | 2011-05-19 | 2011-12-21 | 深圳市中庆微科技开发有限公司 | Drive chip with point-by-point adjustment function |
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| CN101377900B (en) * | 2008-09-28 | 2013-08-28 | 范红霞 | LED display system and display method thereof |
| CN103680411A (en) * | 2013-12-30 | 2014-03-26 | 深圳市大族元亨光电股份有限公司 | Single-wire transmission circuit and method of LED (Light-Emitting Diode) display module single-point correction data |
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| CN101377900B (en) * | 2008-09-28 | 2013-08-28 | 范红霞 | LED display system and display method thereof |
| CN101719363A (en) * | 2009-11-23 | 2010-06-02 | 康佳集团股份有限公司 | Luminance uniformity adjusting method and system of displayer |
| CN101895770A (en) * | 2010-07-09 | 2010-11-24 | 中国科学院长春光学精密机械与物理研究所 | Uniformity correcting method for separating brightness and chromaticity of LED display screen |
| CN101950515A (en) * | 2010-08-20 | 2011-01-19 | 深圳市中庆微科技开发有限公司 | Master-slave point-by-point correcting method for LED display screen |
| CN101950515B (en) * | 2010-08-20 | 2015-12-02 | 深圳市中庆微科技开发有限公司 | A kind of LED display pointwise correction method of master slave mode |
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| CN102290029A (en) * | 2011-05-19 | 2011-12-21 | 深圳市中庆微科技开发有限公司 | Drive chip with point-by-point adjustment function |
| CN102290029B (en) * | 2011-05-19 | 2015-11-04 | 深圳市中庆微科技开发有限公司 | A kind of driving chip of pointwise adjustment |
| CN103021307A (en) * | 2012-12-20 | 2013-04-03 | 富顺光电科技股份有限公司 | Point-by-point correcting equipment and correcting method thereof for LED (Light-Emitting Diode) display screen in simulation field |
| CN103021307B (en) * | 2012-12-20 | 2016-05-25 | 富顺光电科技股份有限公司 | A kind of bearing calibration of LED display pointwise correction equipment of simulated field |
| CN103680411A (en) * | 2013-12-30 | 2014-03-26 | 深圳市大族元亨光电股份有限公司 | Single-wire transmission circuit and method of LED (Light-Emitting Diode) display module single-point correction data |
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| CN106053019A (en) * | 2016-05-30 | 2016-10-26 | 河南通达多媒体制作有限公司 | LED display screen bad point detection system |
| CN110930932A (en) * | 2018-09-03 | 2020-03-27 | 西安诺瓦星云科技股份有限公司 | Display screen correction method and system |
| CN114928910A (en) * | 2022-06-27 | 2022-08-19 | 长沙锐逸微电子有限公司 | LED driving chip |
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| CN101192362B (en) | 2010-09-22 |
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Assignee: ANHUI KONKA ELECTRONICS CO., LTD. Assignor: Konka Group Co., Ltd. Contract record no.: 2011440020213 Denomination of invention: LEDLED display screen on site single-point calibration device and its method Granted publication date: 20100922 License type: Exclusive License Open date: 20080604 Record date: 20110615 |