CN201716964U - Point-by-point correction device for LED display screen and system for acquiring correction data - Google Patents
Point-by-point correction device for LED display screen and system for acquiring correction data Download PDFInfo
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- CN201716964U CN201716964U CN2010201788052U CN201020178805U CN201716964U CN 201716964 U CN201716964 U CN 201716964U CN 2010201788052 U CN2010201788052 U CN 2010201788052U CN 201020178805 U CN201020178805 U CN 201020178805U CN 201716964 U CN201716964 U CN 201716964U
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Abstract
The utility model discloses a point-by-point correction device for an LED display screen, which comprises a storage body, a reading and writing controller and a main circuit module, wherein the storage body is used for storing correction data; the reading and writing controller is connected with the storage body and used for carrying out reading or writing operation on the storage body; the main circuit module is connected with the reading or writing controller, used for sending out reading or writing instructions to the reading or writing controller, carrying out correction on a DVI signal through the correction data and conveying the DVI signal after the correction to a control system of the LED display screen; and the main circuit module is provided with nine multipliers for carrying out the correction on the DVI signal. The utility model further discloses a system for acquiring the correction data of the LED display screen. The matching between the point-by-point correction device 2 for the LED display screen and the system for acquiring the correction data of the LED display screen can realize multiple cycles of correction, working, re-correction and re-working till the display effect is satisfactory.
Description
[technical field]
The utility model relates to a kind of detection means for correcting, particularly a kind of LED display pointwise correction device and obtain the system of LED display correction data.
[background technology]
LED display of the prior art has been widely used in people's the production and life, but the video signal source of band DVI video output interface, its output directly inserts the LED display control system, and in use can have following situation: 1, the brightness of each LED is all different; 2, the brightness of LED is because of time factor deterioration, decline; 3, the inevitable otherness of constant-current driving IC.Owing to above these reasons, the display effect of LED display is unsatisfactory, and at this moment unavoidable appearance phenomenons such as " flower screen, mosaics " just needs employing pointwise correction technology to eliminate these phenomenons, improves display effect.Pointwise correction technology of the prior art generally all is in the rear end, guarantees the display effect of screen by the drive strength of adjusting LED.Thisly adjust the LED drive strength by the rear end and realize the pointwise correction function, can only be applicable to the LED control system of specific function, do not have the LED control system of pointwise correction function, just can not realize pointwise correction.Realize the pointwise correction function in the rear end by adjusting the LED drive strength thus, can only be applicable to the LED display control system of specific function, different LED control system can not be general, the a part of LED display that so just makes can't realize the pointwise correction function, thereby has influence on the display effect of LED display.
[utility model content]
The technical problems to be solved in the utility model provides a kind of versatility that has, and can be applicable to the LED display pointwise correction device of all LED control system and obtain the system of LED display correction data.
The technical scheme that the existing technical matters that solves the utility model adopts is: a kind of LED display pointwise correction device is provided, comprises the memory bank that is used to store correction data; The read-write controller that links to each other and described memory bank is carried out read or write with described memory bank; Linking to each other with described read-write controller and described read-write controller sent reads or writes instruction and by described correction data the DVI signal is proofreaied and correct, and will proofread and correct afterwards the DVI signal conveys to the main circuit module of LED display control system; Described main circuit module is provided with nine multipliers that described DVI signal is proofreaied and correct.
The utility model further improves, described read-write controller is made up of two-way choice device, write signal generator, read signal generator and alternative selector switch, described write signal generator produces write command signal and writing address signal under the control of described main circuit module, described alternative selector switch receives write command signal and writing address signal and produces corresponding command output and address output signal is imported in the described memory bank; Described read signal generator produces the read command signal and reads address signal under the control of described main circuit module, described alternative selector switch receives described read command signal and reads address signal and produce corresponding command output and address output signal is imported in the described memory bank, and the correction data in the described memory bank is imported in the described main circuit module through described two-way choice device.
The technical scheme that the existing technical matters that solves the utility model adopts is: a kind of system that obtains the LED display correction data is provided, is made up of the computing machine that sends the DVI signal, LED display pointwise correction device, LED display control system, LED display and industrial camera; By the DVI signal wire described computing machine, LED display pointwise correction device, LED display control system, LED display are connected successively, also be provided with the data line that is used to transmit signal of communication, the described LED display of the alignment lens of described industrial camera between described computing machine and the described LED display pointwise correction device; Described industrial camera is sent to described computing machine by data line with the image of taking.
The utility model further improves, and the data line interface between described computing machine and the described LED display pointwise correction device is USB interface or UART serial ports or network interface.
The utility model further improves, and the image that described computing machine sends industrial camera is handled and obtained correction data, and described LED display pointwise correction device receives the correction data that described computing machine sends.
Compared to prior art, the beneficial effects of the utility model are: because this LED display pointwise correction device is provided with memory bank, read-write controller and main circuit module, the main circuit module reads correction data by read-write controller from memory bank, multiplier in the main circuit module is proofreaied and correct the DVI signal by correction data, by using this device can improve the display quality of LED display, and this device is applicable to all LED display control system, has versatility.The system that obtains the LED display correction data has used LED display pointwise correction device, by computing machine and industrial camera the correction data of obtaining is write in the LED display pointwise correction device, convenient and quick by using LED display pointwise correction device to make to obtain correction data.
[description of drawings]
Fig. 1 is LED display system architectures figure of the prior art.
Fig. 2 is the frame structure synoptic diagram of LED display pointwise correction device.
Fig. 3 is the frame structure synoptic diagram of read-write controller shown in Figure 2.
Fig. 4 is the display system frame structure synoptic diagram that has LED display pointwise correction device.
Fig. 5 is the frame structure synoptic diagram that obtains the system of LED display correction data.
[embodiment]
As shown in Figure 2, a kind of LED display pointwise correction device comprises the memory bank 23 that is used to store correction data Data_LED; The read-write controller 22 that links to each other with described memory bank 23 and described memory bank 23 is carried out read or write; Linking to each other with described read-write controller 22 and described read-write controller 22 sent reads or writes instruction and by described correction data the DVI signal is proofreaied and correct, and will proofread and correct afterwards the DVI signal conveys to the main circuit module 21 of LED display control system 3; Described main circuit module 21 is provided with nine multipliers that described DVI signal is proofreaied and correct.
As shown in Figure 3, described read-write controller 22 is made up of two-way choice device 31, write signal generator 32, read signal generator 33 and alternative selector switch 34, described write signal generator 32 produces write command signal Comm_wr and writing address signal Addr_wr under the control of described main circuit module 21, described alternative selector switch 34 receives write command signal Comm_wr and writing address signal Addr_wr and produces corresponding command output Comm_out and address output signal Addr_out imports in the described memory bank 23; Described read signal generator 33 produces read command signal Comm_rd and reads address signal Addr_rd under the control of described main circuit module 21, described alternative selector switch 34 receives described read command signal Comm_rd and reads address signal Addr_rd and produce corresponding command output Comm_out and address output signal Addr_out imports in the described memory bank 23, and the correction data Data_LED in the described memory bank 23 are in the described main circuit module 21 of described two-way choice device 31 inputs.
This LED display pointwise correction device 2 has two kinds of patterns, and a kind of is correction mode, and another kind is a mode of operation.This main circuit module 21 produces mode select signal Mode, and when mode select signal Mode was logic high, read-write controller 22 read correction data Data_LED from memory bank 23; Otherwise when mode select signal Mode was logic low, read-write controller 22 write the correction data Data_LED that obtains in the memory bank 23.When this LED display pointwise correction device 2 was in correction mode, mode select signal Mode was a logic low; When this LED display pointwise correction device 2 was in mode of operation, mode select signal Mode was a logic high.
As shown in Figure 4, when LED display 4 operate as normal, LED display pointwise correction device 2 is in mode of operation, and this LED display pointwise correction device 2 is between video signal source 6 and LED display control system 3, and the three connects by the DVI signal wire.Video signal source 6 sends the DVI signal, and this DVI signal is exactly the DVI signal that the DVI signal 1 shown in the figure is promptly proofreaied and correct; After LED display pointwise correction device 2 receives this DVI signal, read signal generator 33 produces read command signal Comm_rd and reads address signal Addr_rd, alternative selector switch 34 receives described read command signal Comm_rd and reads address signal Addr_rd, and produce corresponding command output Comm_out and address output signal Addr_out imports in the described memory bank 23, and read correction data Data_LED at memory bank 23 appropriate address, in the described main circuit module 21 of two-way choice device 31 inputs, described correction data Data_LED and DVI signal are done multiplying by the multiplier pointwise in the main circuit module 21, the DVI signal has been proofreaied and correct in multiplying, the correction back DVI signal just signal of DVI shown in the figure 2 is delivered to LED display control system 3, the demonstration after proofreading and correct at last.
As shown in Figure 5, a kind of system that obtains the LED display correction data is made up of the computing machine 1 that sends the DVI signal, LED display pointwise correction device 2, LED display control system 3, LED display 4 and industrial camera 5; By the DVI signal wire described computing machine 1, LED display pointwise correction device 2, LED display control system 3, LED display 4 are connected successively, also be provided with the data line that is used to transmit signal of communication between described computing machine 1 and the described LED display pointwise correction device 2, the described LED display 4 of the alignment lens of described industrial camera 5; Described industrial camera 5 is sent to described computing machine 1 by data line with the image of taking.In obtaining correction data Data_LED process, it is DVI video signal DVI signal just to LED display pointwise correction device 2, a tunnel that computing machine 1 is sent two paths of signals, and this DVI signal is exactly the signal of DVI shown in the figure 1, is used for image and shows; Another road is a signal of communication, is used to transmit correction data Data_LED.Computing machine 1 is successively sent red entirely by the DVI signal wire, green entirely, full indigo plant and white signal are given LED display pointwise correction device 2, LED display pointwise correction device 2 is left intact, export to LED display control system 3, it is red entirely that LED display 4 is shown respectively, green entirely, complete blue and complete white image, industrial camera 5 gets off these four kinds of image photographics, obtain the chromaticity coordinates (X of each LEDs luminotron of screen body, Y) and brightness value B, industrial camera 5 is by (the X of data line with all LED luminotrons, Y, B) data are passed to computing machine 1, computing machine 1 calculates the correction data Data_LED of each LEDs, this correction data Data_LED comprises 9 numerical value C11, C12, C13, C21, C22, C23, C31, C32, C33, if LED display 4 contains the N LEDs, then LED display 4 has 9N correction data Data_LED.Computing machine 1 is delivered to LED display pointwise correction device 2 by the data line that transmits signal of communication with all correction data Data_LED, this LED display pointwise correction device 2 is in correction mode, write signal generator 32 produces write command signal Comm_wr and writing address signal Addr_wr, alternative selector switch 34 receives described write command signal Comm_wr and writing address signal Addr_wr, and produce corresponding command output Comm_out and address output signal Addr_out imports in the described memory bank 23, and write correction data Data_LED at appropriate address, promptly read-write controller 22 writes correction data Data_LED in the memory bank 23 under 21 controls of main circuit module.
When LED display 4 operate as normal, be that LED display pointwise correction device 2 is in mode of operation, by nine multipliers in the main circuit module 21 to the DVI signal, this DVI signal is exactly the DVI signal 1 shown in the figure, the every bit rgb signal carries out multiplying in the DVI signal of just proofreading and correct, and rgb signal is represented with Rin, Gin, Bin.Rout=Rin*C11+Gin*C12+Bin*C13, Gout=Rin*C21+Gin*C22+Bin*C23, Bout=Rin*C31+Gin*C32+Bin*C33, Rout, Gout, the Bout signal that computing produces proofreaied and correct back DVI signal exactly, this proofreaies and correct back DVI signal is exactly the signal of DVI shown in the figure 2, thereby will proofread and correct back DVI signal conveys improves LED display 4 to LED display control system 3 display quality.Data line interface between computing machine 1 and the LED display pointwise correction device 2 is USB interface or UART serial ports or network interface.
This LED display pointwise correction device 2 has versatility, is applicable to all LED control system, for the LED display control system with rear end calibration function, when using this LED display pointwise correction device 2, its rear end calibration function must be shielded.Using 2 pairs of DVI signals of this LED display pointwise correction device to carry out timing, do not need industrial camera 5, video signal source 6 can also be the playback equipment of other band DVI signal output except that computing machine 1.Because industrial camera 5 is easy to use, but execute-in-place, and the LED display 4 after the use several years need not to transport back factory, but straightened up in place, timing should carry out at dark place or night for fear of the influence of surround lighting.By LED display pointwise correction device 2 and the cooperation of obtaining the system of LED display correction data, can realize proofreading and correct, working, the repeatedly circulation of proofread and correct again, working again is till display effect is satisfied.The described DVI signal of this instructions is exactly the signal of DVI shown in the figure 1, the DVI signal of promptly proofreading and correct; Described correction back DVI signal is exactly the signal of DVI shown in the figure 2.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.
Claims (5)
1. a LED display pointwise correction device is characterized in that: comprise the memory bank that is used to store correction data; The read-write controller that links to each other and described memory bank is carried out read or write with described memory bank; Linking to each other with described read-write controller and described read-write controller sent reads or writes instruction and by described correction data the DVI signal is proofreaied and correct, and will proofread and correct afterwards the DVI signal conveys to the main circuit module of LED display control system; Described main circuit module is provided with nine multipliers that described DVI signal is proofreaied and correct.
2. LED display pointwise correction device according to claim 1, it is characterized in that: described read-write controller is made up of two-way choice device, write signal generator, read signal generator and alternative selector switch, described write signal generator produces write command signal and writing address signal under the control of described main circuit module, described alternative selector switch receives write command signal and writing address signal and produces corresponding command output and address output signal is imported in the described memory bank; Described read signal generator produces the read command signal and reads address signal under the control of described main circuit module, described alternative selector switch receives described read command signal and reads address signal and produce corresponding command output and address output signal is imported in the described memory bank, and the correction data in the described memory bank is imported in the described main circuit module through described two-way choice device.
3. a system that obtains the LED display correction data is characterized in that: be made up of the computing machine that sends the DVI signal, LED display pointwise correction device, LED display control system, LED display and industrial camera; By the DVI signal wire described computing machine, LED display pointwise correction device, LED display control system, LED display are connected successively, also be provided with the data line that is used to transmit signal of communication, the described LED display of the alignment lens of described industrial camera between described computing machine and the described LED display pointwise correction device; Described industrial camera is sent to described computing machine by data line with the image of taking.
4. the system that obtains the LED display correction data according to claim 3 is characterized in that: the data line interface between described computing machine and the described LED display pointwise correction device is USB interface or UART serial ports or network interface.
5. according to claim 3 or 4 described systems, it is characterized in that: the image that described computing machine sends industrial camera is handled and is obtained correction data, and described LED display pointwise correction device receives the correction data that described computing machine sends.
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| CN2010201788052U CN201716964U (en) | 2010-04-27 | 2010-04-27 | Point-by-point correction device for LED display screen and system for acquiring correction data |
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| CN2010201788052U CN201716964U (en) | 2010-04-27 | 2010-04-27 | Point-by-point correction device for LED display screen and system for acquiring correction data |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102231251A (en) * | 2011-06-21 | 2011-11-02 | 华南理工大学 | Camera photo-based method for point-by-point inhomogeneous analysis and correction of LED (Light Emitting Diode) |
| CN102768816A (en) * | 2012-07-30 | 2012-11-07 | 西安诺瓦电子科技有限公司 | Automatic LED (light-emitting diode) display screen correction method |
| CN112562581A (en) * | 2020-12-29 | 2021-03-26 | 深圳市乐美客视云科技有限公司 | Transmission system, method and device for automatic point screen |
-
2010
- 2010-04-27 CN CN2010201788052U patent/CN201716964U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102231251A (en) * | 2011-06-21 | 2011-11-02 | 华南理工大学 | Camera photo-based method for point-by-point inhomogeneous analysis and correction of LED (Light Emitting Diode) |
| CN102768816A (en) * | 2012-07-30 | 2012-11-07 | 西安诺瓦电子科技有限公司 | Automatic LED (light-emitting diode) display screen correction method |
| CN112562581A (en) * | 2020-12-29 | 2021-03-26 | 深圳市乐美客视云科技有限公司 | Transmission system, method and device for automatic point screen |
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Granted publication date: 20110119 Termination date: 20130427 |