CN105070271A - Static LED display screen brightness adjusting method - Google Patents
Static LED display screen brightness adjusting method Download PDFInfo
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- CN105070271A CN105070271A CN201510460014.6A CN201510460014A CN105070271A CN 105070271 A CN105070271 A CN 105070271A CN 201510460014 A CN201510460014 A CN 201510460014A CN 105070271 A CN105070271 A CN 105070271A
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Abstract
The invention discloses a static LED display screen brightness adjusting method. First of all, an adjustable resistor is connected with driving chips of a static LED display screen module for supplying power to the display screen module; secondly, the brightness values of currently lighting modules are obtained through a brightness tester and stored; then, differences between the brightness values of current modules and a preset brightness value are calculated, according to the differences, the values of fixed-value resistors on the driving chips are obtained, and the brightness values of monochromatic LED lamps are adjusted; and finally, the overall brightness is then adjusted so that the adjustment scope is reduced, the adjustment time is greatly increased, adjustment is carried out according to a red-green-blue portion of 3:6:1, and the adjustment precision is improved.
Description
Technical field
The invention belongs to electronics applications field, be specifically related to a kind of static LED display screen brightness adjusting method.
Background technology
LED display (LEDpanel): LED is exactly lightemittingdiode, the english abbreviation of light emitting diode, is called for short LED.It is a kind of display mode by controlling semiconductor light-emitting-diode, and its general appearance is exactly be made up of a lot of individual normally red light emitting diode, and the light on and off by lamp show character.Be used for showing the display screen of the various information such as word, figure, image, animation, market, video, video signal.Shenzhen is LED display development & production origin.The manufacturer of current Shenzhen LED display reaches ten thousand, wherein auspicious by Ai Bisen, light, in the leading eldest child such as auspicious, follow-up also have Shenzhen unexpected rival's attitudes such as bright, extra large lamp, continent be bright to be for a long time shortlisted for top ten, and famous brand company price general charged is higher, and mainly handling cost is higher than general enterprises.Current LED display price is rather transparent.
Compared with other giant-screen terminal display, LED display mainly contains following characteristics:
1, brightness is high: the brightness of outdoor LED display screen is greater than 8000mcd/m2, is at present uniquely can the large-scale display terminal of round-the-clock use out of doors; The brightness of indoor LED display is greater than 2000md/m2.
2, the life-span is long: the LED life-span reaches 100, and more than 000 hour (10 years), this parameter generally all refers to designed life, and brightness is dark also calculates.
3, visual angle is large: indoor visual angle can be greater than 160 degree, and outdoor visual angle can be greater than 120 degree.The size at visual angle depends on the shape of LED light emitting diode.
4, screen area is changeable, little of less than a square meter, greatly then can reach hundreds of, thousands of square meter; 5, easy and computer interface, support software enriches.
In prior art, the brightness regulation of dispatching from the factory of display screen is that more complicated allows again commissioning staff's pain in the neck feelings, needs first to have welded adjustable resistance by hand, then adjustment one by one, regulates successively, surveys a brightness, look at whether arrive predetermined brightness, through adjustment repeatedly, test, get an immediate value, taken off by adjustable resistance, fixed value resistance equivalent in welding, does like this, both lost time, the precision of expection can not be reached again.
Summary of the invention
Technical matters to be solved by this invention is: provide a kind of static LED display screen brightness adjusting method, solves static LED display screen in prior art and to dispatch from the factory the low problem of brightness regulation precision.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
A kind of static LED display screen brightness adjusting method, comprises the steps:
Step 1, on the driving chip of static LED display screen module, connect adjustable resistance, for display screen module is powered;
Step 2, obtain the current brightness value lighting module by luminance test instrument, and to store;
Step 3, difference between the brightness value calculating current module and the brightness value preset, according to the value of fixed value resistance on this mathematic interpolation institute driving chip;
Step 4, to be lighted by PC control red LED lamp, and obtain red luma value;
Step 5, to be lighted by PC control green LED lamp, and obtain Green brightness value;
Step 6, to be lighted by PC control blue led lamp, and obtain red luma value;
Step 7, the ratio value in white light according to red, green, blue look shared, and red, green, blue led lamp monochromatic brightness value, calculate deviate that is red, green, the brightness of blue led lamp;
Step 8, the adjustable resistance be connected with red, green, blue led lamp driving chip according to deviate adjustment that is red, green, the brightness of blue led lamp;
Step 9, red by PC control, green, blue led lamp are all lighted, and obtain the brightness value of LED module now, compare with the brightness value preset, if luminance deviation is greater than the deviation threshold preset, then repeated execution of steps 4 to step 8, otherwise, perform step 10;
The resistance of step 10, acquisition adjustable resistance, stores, and adjustable resistance is changed into equivalent fixed value resistance.
Described static LED display screen comprises some modules, each module comprises LED, driving chip, three driving chip and three groups of LED form a display unit, each driving chip drives one group of LED, three groups of LED are respectively one group of red LED lamp, one group of green LED lamp, one group of blue led lamp, each signal output pin of driving chip is respectively connected with a LED, wherein, to connect between red LED lamp with power supply a resistance, three driving chip are sequentially connected in series, the constant current of described each driving chip drives pin and a fixed value resistance and the adjustable resistance of connecting between signal ground.
Each driving chip includes 8 or 16 drive singal output pins, 3 control signal pin, 1 data-signal input pin, 1 data-signal output pin, wherein, 3 control signal pin are respectively sheet and select input pin, latch signal pin, clock signal pin, wherein, the data-signal input pin of three driving chip, output pin are sequentially connected in series.
Described driving chip is MBI5024 or MBI5167 that scientific & technical corporation is built up in Taiwan.
Described LED is paster LED lamp or plug-in unit LED.
Compared with prior art, the present invention has following beneficial effect:
1, be connected with an adjustable resistance by a fixed value resistance, first a fixed value resistance is determined, regulate adjustable resistance again, like this, the range shorter regulated, substantially increases regulating time, by the method regulating monochromatic brightness and overall brightness to combine, and be that 3:6:1 regulates according to RGB ratio, improve degree of regulation.
2, by a resistance of connecting in red LED lamp set, effectively play the effect of dividing potential drop, reduce the impact to red LED lamp, increase serviceable life, effectively reduce the generation of dead point rate.
3, MBI5024 chip is that a performance that accumulation science and technology in Taiwan controls to release for LED display is specially high, the chip that cost is low, and the LED display control for the type can realize its display demand, reduces the cost of whole screen simultaneously.
Embodiment
Below structure of the present invention and the course of work are described further.
A kind of static LED display screen brightness adjusting method, comprises the steps:
Step 1, on the driving chip of static LED display screen module, connect adjustable resistance, for display screen module is powered;
Step 2, obtain the current brightness value lighting module by luminance test instrument, and to store;
Step 3, difference between the brightness value calculating current module and the brightness value preset, according to the value of fixed value resistance on this mathematic interpolation institute driving chip;
Step 4, to be lighted by PC control red LED lamp, and obtain red luma value;
Step 5, to be lighted by PC control green LED lamp, and obtain Green brightness value;
Step 6, to be lighted by PC control blue led lamp, and obtain red luma value;
Step 7, the ratio value in white light according to red, green, blue look shared, and red, green, blue led lamp monochromatic brightness value, calculate deviate that is red, green, the brightness of blue led lamp;
Step 8, the adjustable resistance be connected with red, green, blue led lamp driving chip according to deviate adjustment that is red, green, the brightness of blue led lamp;
Step 9, red by PC control, green, blue led lamp are all lighted, and obtain the brightness value of LED module now, compare with the brightness value preset, if luminance deviation is greater than the deviation threshold preset, then repeated execution of steps 4 to step 8, otherwise, perform step 10;
The resistance of step 10, acquisition adjustable resistance, stores, and adjustable resistance is changed into equivalent fixed value resistance.
Be connected with an adjustable resistance by a fixed value resistance, first a fixed value resistance is determined, regulate adjustable resistance again, like this, the range shorter regulated, substantially increases regulating time, by the method regulating monochromatic brightness and overall brightness to combine, and be that 3:6:1 regulates according to RGB ratio, improve degree of regulation.
Described static LED display screen comprises some modules, each module comprises LED, driving chip, three driving chip and three groups of LED form a display unit, each driving chip drives one group of LED, three groups of LED are respectively one group of red LED lamp, one group of green LED lamp, one group of blue led lamp, each signal output pin of driving chip is respectively connected with a LED, wherein, to connect between red LED lamp with power supply a resistance, three driving chip are sequentially connected in series, the constant current of described each driving chip drives pin and a fixed value resistance and the adjustable resistance of connecting between signal ground.
Each driving chip includes 8 or 16 drive singal output pins, 3 control signal pin, 1 data-signal input pin, 1 data-signal output pin, wherein, 3 control signal pin are respectively sheet and select input pin, latch signal pin, clock signal pin, wherein, the data-signal input pin of three driving chip, output pin are sequentially connected in series.
Described driving chip is MBI5024 or MBI5167 that scientific & technical corporation is built up in Taiwan.
Described LED is paster LED lamp or plug-in unit LED.
MBI5024 chip has following features:
MBI5024 utilizes up-to-date PrecisionDrive technology, and aim at the drive IC of LED display panel design, the CMOS bit shift register that it is built-in and bolt-lock function, can convert the input data of serial to parallel output data formats.
The input voltage range value of MBI5024 is 3.3 volts to 5 volts, provides 16 current sources, 3-45mA can be provided to determine the magnitude of current with driving LED in each output stage; And in single IC the current difference of output channel be less than ± 3%; Output current difference between many IC is less than ± and 6%; Electric current, along with output terminal withstand voltage (VDS) change, is controlled in every volt 0.1%; And electric current is subject to service voltage (VDD), the change of environment temperature is also controlled in 1%.User can via selecting the RSET of different resistance to adjust the size of current of each output stage of MBI5024, by this mechanism, and user can the luminosity of accurately control LED.
The design of MBI5024 ensures that its output stage can be withstand voltage 17 volts, therefore can be connected in series multiple LED at each output terminal.
In addition, MBI5024 also provides the high clock frequency of 25MHz to meet system to the demand in mass data transmission.
Control element in LED display adopts MBI5024 control chip, MBI5024 chip is that a performance that accumulation science and technology in Taiwan controls to release for LED display is specially high, the chip that cost is low, LED display for the type controls to realize its display demand, reduces the cost of whole screen simultaneously.
Claims (5)
1. a static LED display screen brightness adjusting method, is characterized in that: comprise the steps:
Step 1, on the driving chip of static LED display screen module, connect adjustable resistance, for display screen module is powered;
Step 2, obtain the current brightness value lighting module by luminance test instrument, and to store;
Step 3, difference between the brightness value calculating current module and the brightness value preset, according to the value of fixed value resistance on this mathematic interpolation institute driving chip;
Step 4, to be lighted by PC control red LED lamp, and obtain red luma value;
Step 5, to be lighted by PC control green LED lamp, and obtain Green brightness value;
Step 6, to be lighted by PC control blue led lamp, and obtain red luma value;
Step 7, the ratio value in white light according to red, green, blue look shared, and red, green, blue led lamp monochromatic brightness value, calculate deviate that is red, green, the brightness of blue led lamp;
Step 8, the adjustable resistance be connected with red, green, blue led lamp driving chip according to deviate adjustment that is red, green, the brightness of blue led lamp;
Step 9, red by PC control, green, blue led lamp are all lighted, and obtain the brightness value of LED module now, compare with the brightness value preset, if luminance deviation is greater than the deviation threshold preset, then repeated execution of steps 4 to step 8, otherwise, perform step 10;
The resistance of step 10, acquisition adjustable resistance, stores, and adjustable resistance is changed into equivalent fixed value resistance.
2. static LED display screen brightness adjusting method according to claim 1, it is characterized in that: described static LED display screen comprises some modules, each module comprises LED, driving chip, three driving chip and three groups of LED form a display unit, each driving chip drives one group of LED, three groups of LED are respectively one group of red LED lamp, one group of green LED lamp, one group of blue led lamp, each signal output pin of driving chip is respectively connected with a LED, wherein, to connect between red LED lamp with power supply a resistance, three driving chip are sequentially connected in series, the constant current of described each driving chip drives pin and a fixed value resistance and the adjustable resistance of connecting between signal ground.
3. static LED display screen brightness adjusting method according to claim 2, it is characterized in that: each driving chip includes 8 or 16 drive singal output pins, 3 control signal pin, 1 data-signal input pin, 1 data-signal output pin, wherein, 3 control signal pin are respectively sheet and select input pin, latch signal pin, clock signal pin, wherein, the data-signal input pin of three driving chip, output pin are sequentially connected in series.
4. static LED display screen brightness adjusting method according to claim 2, is characterized in that: described driving chip is MBI5024 or MBI5167 that scientific & technical corporation is built up in Taiwan.
5. static LED display screen brightness adjusting method according to claim 2, is characterized in that: described LED is paster LED lamp or plug-in unit LED.
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| CN201510460014.6A CN105070271A (en) | 2015-07-31 | 2015-07-31 | Static LED display screen brightness adjusting method |
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| CN201510460014.6A CN105070271A (en) | 2015-07-31 | 2015-07-31 | Static LED display screen brightness adjusting method |
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| CN105070271A true CN105070271A (en) | 2015-11-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107342066A (en) * | 2017-06-19 | 2017-11-10 | 广东欧珀移动通信有限公司 | Screen luminance adjustment method, device and its equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1006506A1 (en) * | 1998-12-03 | 2000-06-07 | Hewlett-Packard Company | Optical vehicle display |
| CN104021765A (en) * | 2014-06-18 | 2014-09-03 | 无锡市崇安区科技创业服务中心 | System and method for adjusting white balance of all-color LED screen |
| CN104347033A (en) * | 2014-11-20 | 2015-02-11 | 无锡科思电子科技有限公司 | LED (Light-Emitting Diode) display screen driving circuit |
| CN104392696A (en) * | 2014-12-01 | 2015-03-04 | 苏州立瓷电子技术有限公司 | White balance adjusting method of LED display screen |
-
2015
- 2015-07-31 CN CN201510460014.6A patent/CN105070271A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1006506A1 (en) * | 1998-12-03 | 2000-06-07 | Hewlett-Packard Company | Optical vehicle display |
| CN104021765A (en) * | 2014-06-18 | 2014-09-03 | 无锡市崇安区科技创业服务中心 | System and method for adjusting white balance of all-color LED screen |
| CN104347033A (en) * | 2014-11-20 | 2015-02-11 | 无锡科思电子科技有限公司 | LED (Light-Emitting Diode) display screen driving circuit |
| CN104392696A (en) * | 2014-12-01 | 2015-03-04 | 苏州立瓷电子技术有限公司 | White balance adjusting method of LED display screen |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107342066A (en) * | 2017-06-19 | 2017-11-10 | 广东欧珀移动通信有限公司 | Screen luminance adjustment method, device and its equipment |
| CN107342066B (en) * | 2017-06-19 | 2019-07-23 | Oppo广东移动通信有限公司 | Screen luminance adjustment method, device and its equipment |
| US10522096B2 (en) | 2017-06-19 | 2019-12-31 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method for adjusting screen luminance, terminal device and storage medium |
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Application publication date: 20151118 |