CN201622560U - Point-to-point correcting device for video signal brightness of front end of LED display screen - Google Patents
Point-to-point correcting device for video signal brightness of front end of LED display screen Download PDFInfo
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- CN201622560U CN201622560U CN2010201112270U CN201020111227U CN201622560U CN 201622560 U CN201622560 U CN 201622560U CN 2010201112270 U CN2010201112270 U CN 2010201112270U CN 201020111227 U CN201020111227 U CN 201020111227U CN 201622560 U CN201622560 U CN 201622560U
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Abstract
The utility model discloses a point-to-point correcting device for the video signal brightness of the front end of an LED display screen, aiming at solving the technical problems of leading the correcting device to have strong universality, be applicable to all LED control systems and improve display effect. The utility model adopts the following technical scheme: the point-to-point correcting device for video signal brightness of the front end of the LED display screen comprises a computer, an LED display screen control system and an LED display screen, wherein the video signal source of the computer outputs a DVI signal to the LED display screen control system which drives the LED display screen; a correcting device is arranged between the computer and the LED display screen control system; the computer is connected with a stepping control system; and the computer and the stepping control system are respectively connected with a photoelectric detection probe. Compared with the prior art, when in normal use, the stepping control system and the photoelectric detection probe are not needed; besides the computer, the video signal source improves the display effect; and the correcting device has strong universality and is applicable to all LED control systems.
Description
Technical field
The utility model relates to the brightness pointwise correction device in LED screen display technique field, particularly a kind of LED display.
Background technology
At present because 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; 3, the inevitable otherness of constant-current driving IC.Based on these factors, the display effect of LED display is unsatisfactory, unavoidable appearance phenomenons such as " flower screen, mosaics ", need to adopt the pointwise correction technology to eliminate these phenomenons, improve display effect, conventional LED display does not mostly have the pointwise correction function, and the LED display of pointwise correction function is arranged, also, realize by the drive strength of adjusting LED mostly in the rear end.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, the LED control system that does not have the pointwise correction function, and the pointwise correction function is realized by adjusting the LED drive strength in the rear end, can only be applicable to the LED control system of specific function, different LED control system can not be general, just can not realize the pointwise correction function.
Summary of the invention
The purpose of this utility model provides a kind of LED display front end video luminance signal pointwise correction device, and the technical matters that solve is to make this means for correcting highly versatile, is applicable to all LED control system, improves display effect.
For solving the problems of the technologies described above, the utility model is by the following technical solutions: a kind of LED display front end video luminance signal pointwise correction device, comprise computing machine, LED display control system and LED display, the video signal source output DVI signal of described computing machine is given the LED display control system, LED display control system driving LED display screen, be provided with means for correcting between described computing machine and the LED display control system, computing machine connects step-by-step control system, and described computing machine and step-by-step control system connect the Photoelectric Detection probe respectively.
Means for correcting of the present utility model is made up of main circuit module, data double-way selector switch and storer, the video signal source of described computing machine is exported three road signals, wherein, two-way output signal DVI video signal (DVI signal 1) and control command signal (Comm_PC) are given the main circuit module, one tunnel output signal correction data signal (Data_LED) is given the data double-way selector switch, and the output signal of data double-way selector switch (Data in) is given the main circuit module; The main circuit module is exported four road signals, wherein, one road output mode signal selects signal (Mode) to give the data double-way selector switch, two-way output signal address signal (Addr me) and command signal (Comm me) are given storer, one tunnel output signal (DVI signal 2) is given the LED display control system, and described storer output two-way signaling (Data io) is given the data double-way selector switch.
Be connected communication by USB interface, UART serial ports or network interface between means for correcting of the present utility model and the computing machine.
The utility model compared with prior art, employing is provided with means for correcting between computing machine and LED display control system, computing machine is by red, green, blue order, each LED luminotron is lighted in pointwise, and each LED luminotron of lighting of Photoelectric Detection alignment probe passes to computing machine with all LED monochrome informations, machine is handled the correction data that the back produces all LED luminotrons as calculated, be stored on the storer in the means for correcting, obtain and store correction data, finish trimming process.During normal the use, do not need step-by-step control system and Photoelectric Detection probe, video signal source can also be the playback equipment of other band DVI output except that computing machine, improves display effect, and its highly versatile, is applicable to all LED control system.
Description of drawings
Fig. 1 is the prior art constructions schematic diagram.
Fig. 2 is a structure principle chart of the present utility model.
Fig. 3 is a structural representation of the present utility model.
Fig. 4 is the circuit theory diagrams of the utility model means for correcting.
Embodiment
The utility model will be further described below in conjunction with drawings and Examples.
As shown in Figure 1, be the prior art constructions schematic diagram, conventional LED display, the video signal source of band DVI video output interface, its output directly inserts the LED display control system, because LED luminotron and the inevitable otherness of constant-current driving IC, display effect is unsatisfactory.
As shown in Figures 2 and 3, LED display front end video luminance signal pointwise correction device of the present utility model comprises computing machine 1, LED display control system 3 and LED display 5, the video signal source output DVI signal of described computing machine 1 is given LED display control system 3, LED display control system 3 driving LED display screens 5, be provided with means for correcting 2 between described computing machine 1 and the LED display control system 3, computing machine 1 connects step-by-step control system 4, and described computing machine 1 and step-by-step control system 4 connect Photoelectric Detection probe 6 respectively.
Its principle of work is summarized as follows:
Computing machine 1 output three road signals are given means for correcting, and one the tunnel is DVI video signal DVI signal 1, is used for image and shows; One the tunnel is correction data signal Data_LED, also has one the tunnel to be control command signal Comm_PC.
The computing machine outputting video signal, the vision signal gray scale is got maximal value 255, send the signal of lighting by the look pointwise, means for correcting 2 temporarily is left intact, export to LED display control system 3, light the LED screen by the look pointwise, light order from left to right, (also can be other order) from top to bottom, computing machine 1 is according to current position of lighting the LED luminotron, send control signal and give step-by-step control system 4, and finally control 6 displacements of Photoelectric Detection probe, aim at the LED luminotron of lighting, obtain the brightness value of lighting the LED luminotron, and be transferred to computing machine.
Computing machine relatively produces correction data Data_LED in the back with the brightness value that obtains and expectation value, and choosing of expectation value is very crucial, too smallly makes the brightness of screen body on the low side, and it is not obvious to cross ambassador's calibration result.Computing machine passes through data line, send the correction data signal Data_LED of all LED luminotrons to means for correcting 2, and send control command signal Comm_PC and give means for correcting 2, correction data signal Data_LED is stored in the storer 23 in the means for correcting, computing machine 1 can pass through interface shapes such as USB interface, UART serial ports, network interface, sends correction data, command signal to means for correcting 2.
Computing machine is by red, green, blue order, each LED luminotron is lighted in pointwise, Photoelectric Detection probe 6 is aimed at each LED luminotron of lighting, all LED monochrome informations are passed to computing machine 1, machine 1 is handled the correction data that the back produces all LED luminotrons as calculated, is stored on the storer 23 in the means for correcting 2.
So far, obtain and store the correction data process and finish, next, can normally use this to install.During normal the use, do not need step-by-step control system and Photoelectric Detection probe, video signal source can also be the playback equipment of other band DVI output except that computing machine.
In sum, device of the present utility model has two kinds of patterns: correction mode and mode of operation.Correction mode needs computing machine 1, step-by-step control system 4, Photoelectric Detection probe 6 to cooperate, so that obtain correction data and be stored on the storer 23 in the means for correcting 2, mode of operation is used to shield the normal demonstration of body.Sometimes, need through " proofread and correct, work is proofreaied and correct again, works again " repeatedly circulation, till display effect is satisfied.
As shown in Figure 4, means for correcting 2 of the present utility model is made up of main circuit module 21, data double-way selector switch 22 and storer 23, the video signal source of described computing machine 1 is exported three road signals, wherein, two-way output signal DVI video signal DVI signal 1 and control command signal Comm_PC give main circuit module 21, one tunnel output signal correction data signal Data_LED gives data double-way selector switch 22, and the output signal Data in of data double-way selector switch 22 gives main circuit module 21; Main circuit module 21 outputs four road signals, wherein, one road output mode signal selects signal Mode to give data double-way selector switch 22, two-way output signal address signal Addr me and command signal Comm me give storer 23, one tunnel output signal DVI signal 2 is given LED display control system 3, and described storer 23 output two-way signaling Data io give data double-way selector switch 22.
When being in mode of operation, under the control of main circuit module 21, from storer 23, read correction data, enter main circuit module 21 by data double-way selector switch 22, multiplying is done in correction data and 1 pointwise of DVI video signal DVI signal, DVI video signal DVI vision signal 1 has been adjusted in multiplying, produces DVI signal 2 and gives follow-up LED display control system 3, the demonstration after proofreading and correct.
The access procedure of main circuit module controls correction data is as follows:
When being in correction mode, main circuit module 21 produces mode select signal Mode and gives data double-way selector switch 22, when mode select signal Mode is logic high, data stream is from Data_LED to Data_io, main circuit module 21 is sent address signal Add_mem, command signal Comm_mem simultaneously and is given storer 23, and correction data is stored in the storer 23.
Otherwise, when mode select signal Mode is logic low, data stream is from Data_io to Data_in, main circuit module 21 is sent address signal Add_mem, command signal Comm_mem simultaneously and is given storer 23, correction data is read from storer 23, enter main circuit module 21 through data double-way selector switch 22, use for multiplier.
3 multipliers are arranged in the main circuit module 21,, carry out multiplying every bit rgb signal in the DVI signal 1 (representing) with Rin, Gin, Bin:
Rout＝Rin*C1
Gout＝Gin*C2
Bout＝Bin*C3
C1, C2, C3 are respectively redness, green, the blue-correction data of corresponding point, and Rout, Gout, Bout signal that computing produces are promptly formed DVI signal 2 and exported to follow-up LED display control system.
Because the measured value of Photoelectric Detection probe measurement 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 utility model is apparently higher than the calibration result of the method for taking pictures.
Claims (3)
1. LED display front end video luminance signal pointwise correction device, comprise computing machine (1), LED display control system (3) and LED display (5), the video signal source output DVI signal of described computing machine (1) is given LED display control system (3), LED display control system (3) driving LED display screen (5), it is characterized in that: be provided with means for correcting (2) between described computing machine (1) and the LED display control system (3), computing machine (1) connects step-by-step control system (4), and described computing machine (1) and step-by-step control system (4) connect Photoelectric Detection probe (6) respectively.
2. LED display front end video luminance signal pointwise correction device according to claim 1, it is characterized in that: described means for correcting (2) is by main circuit module (21), data double-way selector switch (22) and storer (23) are formed, the video signal source of described computing machine (1) is exported three road signals, wherein, two-way output signal DVI video signal (DVI signal 1) and control command signal (Comm_PC) are given main circuit module (21), one tunnel output signal correction data signal (Data_LED) is given data double-way selector switch (22), and the output signal of data double-way selector switch (22) (Data in) is given main circuit module (21); Main circuit module (21) output four road signals, wherein, one road output mode signal selects signal (Mode) to give data double-way selector switch (22), two-way output signal address signal (Addr me) and command signal (Comm me) are given storer (23), one tunnel output signal (DVI signal 2) is given LED display control system (3), and described storer (23) output two-way signaling (Data io) is given data double-way selector switch (22).
3. LED display front end video luminance signal pointwise correction device according to claim 2 is characterized in that: be connected communication by USB interface, UART serial ports or network interface between described means for correcting (2) and the computing machine (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010201112270U CN201622560U (en) | 2010-02-04 | 2010-02-04 | Point-to-point correcting device for video signal brightness of front end of LED display screen |
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| CN2010201112270U CN201622560U (en) | 2010-02-04 | 2010-02-04 | Point-to-point correcting device for video signal brightness of front end of LED display screen |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102467870A (en) * | 2010-11-05 | 2012-05-23 | 深圳利亚德光电有限公司 | Intelligent storage method, intelligent storage device, intelligent storage system, light-emitting diode (LED) display panel and display |
| CN113596347A (en) * | 2020-04-30 | 2021-11-02 | 西安诺瓦星云科技股份有限公司 | Image display method and image display device |
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2010
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102467870A (en) * | 2010-11-05 | 2012-05-23 | 深圳利亚德光电有限公司 | Intelligent storage method, intelligent storage device, intelligent storage system, light-emitting diode (LED) display panel and display |
| CN102467870B (en) * | 2010-11-05 | 2015-10-28 | 深圳利亚德光电有限公司 | Intelligent storage method, device, system and LED display panel thereof and display |
| CN113596347A (en) * | 2020-04-30 | 2021-11-02 | 西安诺瓦星云科技股份有限公司 | Image display method and image display device |
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