CN107945730A - A kind of control method of the LED standard screen based on two-level current - Google Patents

A kind of control method of the LED standard screen based on two-level current Download PDF

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CN107945730A
CN107945730A CN201711175042.9A CN201711175042A CN107945730A CN 107945730 A CN107945730 A CN 107945730A CN 201711175042 A CN201711175042 A CN 201711175042A CN 107945730 A CN107945730 A CN 107945730A
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mrow
mtd
msup
mfrac
mtr
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田国辉
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Shenzhen G-Energy Technology Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The invention discloses a kind of control method of the LED standard screen based on two-level current, comprise the following steps：S1：LED tri coloured lanterns unit brightness, wavelength under collection two-level current；S2：The correction coefficient of two-level current LED tri coloured lanterns is generated, carries out colourity, gamma correction；S3：Calculate the time T needed for two-level current driving LED tri coloured lanterns.The design of control method of the LED standard screen based on two-level current is reasonable, is operated without people, is calculated by algorithm, be easily integrated with industrial producing line automatically, saves manpower and Material Cost, and correction school is surveyed accurate, it is easy to accomplish industrialization.

Description

A kind of control method of the LED standard screen based on two-level current
Technical field
The present invention relates to LED technology field, is specifically a kind of control method of the LED standard screen based on two-level current.
Background technology
LED display is formed by display pixel by array arrangement, by the different ashes of RGB lamps three primary colours for controlling LED respectively Level combination is spent, all colors are formed, so as to constitute the colour gamut that LED is shown.The characteristics of luminescence of LED has necessarily discrete Property, it is in the field of business, under existing process conditions, even if can all have necessarily with a batch of LED chip, brilliant source body, its brightness, wavelength Difference, common practice are all manually to screen several times, form the LED module of different batches, cause chip, the resource wave of LED light Take, Material Cost rises, also not unified enough in the saturation degree of color.In order to solve this series of problems, the present invention uses two level Circuit current control algolithm, makes drive screen brightness range become wide, and color is finer and smoother, so as to not lose gray scale registration；Finally to more The brightness of level current control carries out colourity, and gamma correction, it is more consistent with artwork to reach color, referred to as LED standard screen.
The content of the invention
It is above-mentioned to solve it is an object of the invention to provide a kind of control method of the LED standard screen based on two-level current The problem of being proposed in background technology.
To achieve the above object, the present invention provides following technical solution：
A kind of control method of the LED standard screen based on two-level current, comprises the following steps：
S1：LED tri coloured lanterns unit brightness, wavelength under collection two-level current；
Calculate actual low current XYZ values：It is known：The chromaticity coordinates of Rx, Ry single red LEDs, Lr are single red LED unit brightness values；The chromaticity coordinates of Gx, Gy single green LEDs, Lg are single green LED unit brightness value；Bx, By single The chromaticity coordinates of blue led, Lb is single blue led unit brightness value；
The XYZ values of the low current of calculating standard：
S2：The correction coefficient of two-level current LED tri coloured lanterns is generated, carries out colourity, gamma correction；
Calculate low current matrix correction coefficient：
Obtain：[conv_coe]=[XYZ_target] * [XYZ_org]-1；
Rr is display source signal when being red, the luminance factor of red light；Rg is display source signal when being red, green light it is bright Spend coefficient；Rb is display source signal when being red, the luminance factor of blue lamp；Gr is display source signal when being green, red light it is bright Spend coefficient；Gg is display source signal when being green, the luminance factor of green light；Gb is display source signal when being green, blue lamp it is bright Spend coefficient；Br is display source signal when being blueness, the luminance factor of red light；Bg is display source signal when being blueness, green light it is bright Spend coefficient；Bb is display source signal when being blueness, the luminance factor of blue lamp；
The brightness value that computer is shown, into Gamma linear operation formula：
Wherein, X is 8 gray scales registration of RGB 0~255, and b is constant, and n is gamma value, and m is the control of gray-scale Control device Digit；Obtaining correction low current parameter is：
The LED total amounts that shine are made of the sum of brightness of current：Trmin ' * Lrmin '+Trmax " * Lrmax "= Trall*Lrall；
It is known：Trmin ', Lrmin ', Lrmax ", Trall, Lrall, try to achieve the time Trmax " of high current：
Correct the actual displayed parameter of high current：
Trmax_ajust=Tr " max*Rr "+Tg " max*Gr+Tb " max*Br；
Tgmax_ajust=Tr " max*Rg "+Tg " max*Gg+Tb " max*Bg；
Tbmax_ajust=Tr " max*Rb "+Tg " max*Gb+Tb " max*Bb；
S3：Calculate the time T needed for two-level current driving LED tri coloured lanterns：When pcs signal display parameter value, when obtaining Between T；Then the gray level control of single primary colours is carried out, the fluorescent lifetime of LED is controlled by controlling pulse width, realizes gray level Display.
As the further scheme of the present invention：Min is below 30 grayscale.
Compared with prior art, the beneficial effects of the invention are as follows：
The design of control method of the LED standard screen based on two-level current is reasonable, operates without people, is counted automatically by algorithm Calculate, be easily integrated with industrial producing line, save manpower and Material Cost, correction school is surveyed accurate, it is easy to accomplish industrialization.
Brief description of the drawings
Fig. 1 is the flow chart of the control method of the LED standard screen based on two-level current.
Embodiment
The technical solution of this patent is described in more detail with reference to embodiment.
Referring to Fig. 1, a kind of control method of the LED standard screen based on two-level current, comprises the following steps：
S1：LED tri coloured lanterns unit brightness, wavelength under collection two-level current；During the measurement of color system, the measurement of equipment Precision can reach：Brightness：± 3%；Chromaticity coordinates：±0.003；
Calculate actual low current XYZ values：
It is known：The chromaticity coordinates of the 1st, Rx, Ry single red LEDs, Lr are single red LED unit brightness value；2nd, Gx, Gy The chromaticity coordinates of single green LED, Lg are single green LED unit brightness value；The chromaticity coordinates of the 3rd, Bx, By single blue leds, Lb For single blue led unit brightness value；
The XYZ values of the low current of calculating standard：
S2：The correction coefficient of two-level current LED tri coloured lanterns is generated, carries out colourity, gamma correction；
Calculate low current matrix correction coefficient：
Obtain：[conv_coe]=[XYZ_target] * [XYZ_org]-1；
In conversion coefficient matrix, Rr is display source signal when being red, the luminance factor of red light；Rg is that display source signal is When red, the luminance factor of green light；Rb is display source signal when being red, the luminance factor of blue lamp；Gr is that display source signal is When green, the luminance factor of red light；Gg is display source signal when being green, the luminance factor of green light；Gb is that display source signal is When green, the luminance factor of blue lamp；Br is display source signal when being blueness, the luminance factor of red light；Bg is that display source signal is When blue, the luminance factor of green light；Bb is display source signal when being blueness, the luminance factor of blue lamp；
The brightness value that computer is shown, into Gamma linear operation formula：
Wherein, X is 8 gray scales registration of RGB 0~255, and b is constant, and n is gamma value, and m is the control of gray-scale Control device Digit；It is (min is below 30 grayscale, uses low current) to obtain correction low current parameter：
The LED total amounts that shine are made of the sum of brightness of current：Trmin ' * Lrmin '+Trmax " * Lrmax "= Trall*Lrall；
It is known：Trmin ', Lrmin ', Lrmax ", Trall, Lrall, try to achieve the time Trmax " of high current：
Correct the actual displayed parameter of high current：
Trmax_ajust=Tr " max*Rr "+Tg " max*Gr+Tb " max*Br；
Tgmax_ajust=Tr " max*Rg "+Tg " max*Gg+Tb " max*Bg；
Tbmax_ajust=Tr " max*Rb "+Tg " max*Gb+Tb " max*Bb；
S3：Calculate the time T needed for two-level current driving LED tri coloured lanterns：When pcs signal display parameter value, when obtaining Between T, T is exactly the time of pulsewidth modulation (PWM)；Then the gray level control of single primary colours is carried out, is controlled by controlling pulse width The fluorescent lifetime of LED processed, realizes the display of gray level.
The present invention operation principle be：Original brightness, chromatic value by each lamp for gathering RGB-LED, are referred to as LED Characteristic value；Then LED characteristic values are contrasted with standard value, generation coefficient matrix is issued to LED screen controller.
The design of control method of the LED standard screen based on two-level current is reasonable, operates without people, is counted automatically by algorithm Calculate, be easily integrated with industrial producing line, save manpower and Material Cost, correction school is surveyed accurate, it is easy to accomplish industrialization.
, it is necessary to illustrate, unless otherwise bright in the description based on the control method of the LED standard screen of two-level current True regulation and restriction, term " setting ", " connected " and " connection " should be interpreted broadly, for example, it may be being fixedly connected, also may be used To be to be detachably connected, or it is integrally connected；It can be directly connected, can also be indirectly connected by intermediary, Ke Yishi Connection inside two elements.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this Concrete meaning in invention.
The better embodiment of this patent is explained in detail above, but this patent is not limited to above-mentioned embodiment party Formula, can also be on the premise of this patent objective not be departed from the knowledge that one skilled in the relevant art possesses Make a variety of changes.

Claims (2)

1. a kind of control method of the LED standard screen based on two-level current, it is characterised in that comprise the following steps：
S1：LED tri coloured lanterns unit brightness, wavelength under collection two-level current；
Calculate actual low current XYZ values：It is known：The chromaticity coordinates of Rx, Ry single red LEDs, Lr are single red LED list Position brightness value；The chromaticity coordinates of Gx, Gy single green LEDs, Lg are single green LED unit brightness value；Bx, By single bluenesss The chromaticity coordinates of LED, Lb are single blue led unit brightness value；
<mrow> <mo>&amp;lsqb;</mo> <mi>X</mi> <mi>Y</mi> <mi>Z</mi> <mo>_</mo> <mi>o</mi> <mi>r</mi> <mi>g</mi> <mo>&amp;rsqb;</mo> <mo>=</mo> <mfenced open = "(" close = ")"> <mtable> <mtr> <mtd> <mrow> <mi>R</mi> <mi>X</mi> </mrow> </mtd> <mtd> <mrow> <mi>R</mi> <mi>Y</mi> </mrow> </mtd> <mtd> <mrow> <mi>R</mi> <mi>Z</mi> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <mi>G</mi> <mi>X</mi> </mrow> </mtd> <mtd> <mrow> <mi>G</mi> <mi>Y</mi> </mrow> </mtd> <mtd> <mrow> <mi>G</mi> <mi>Z</mi> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <mi>B</mi> <mi>X</mi> </mrow> </mtd> <mtd> <mrow> <mi>B</mi> <mi>Y</mi> </mrow> </mtd> <mtd> <mrow> <mi>B</mi> <mi>Z</mi> </mrow> </mtd> </mtr> </mtable> </mfenced> <mo>=</mo> <mfenced open = "(" close = ")"> <mtable> <mtr> <mtd> <mrow> <mi>L</mi> <mi>r</mi> <mo>*</mo> <mfrac> <mrow> <mi>R</mi> <mi>x</mi> </mrow> <mrow> <mi>R</mi> <mi>y</mi> </mrow> </mfrac> </mrow> </mtd> <mtd> <mrow> <mi>L</mi> <mi>r</mi> </mrow> </mtd> <mtd> <mrow> <mi>L</mi> <mi>r</mi> <mo>*</mo> <mfrac> <mrow> <mo>(</mo> <mn>1</mn> <mo>-</mo> <mi>R</mi> <mi>x</mi> <mo>-</mo> <mi>R</mi> <mi>y</mi> <mo>)</mo> </mrow> <mrow> <mi>R</mi> <mi>y</mi> </mrow> </mfrac> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <mi>L</mi> <mi>g</mi> <mo>*</mo> <mfrac> <mrow> <mi>G</mi> <mi>x</mi> </mrow> <mrow> <mi>G</mi> <mi>y</mi> </mrow> </mfrac> </mrow> </mtd> <mtd> <mrow> <mi>L</mi> <mi>g</mi> </mrow> </mtd> <mtd> <mrow> <mi>L</mi> <mi>g</mi> <mo>*</mo> <mfrac> <mrow> <mo>(</mo> <mn>1</mn> <mo>-</mo> <mi>G</mi> <mi>x</mi> <mo>-</mo> <mi>G</mi> <mi>y</mi> <mo>)</mo> </mrow> <mrow> <mi>G</mi> <mi>y</mi> </mrow> </mfrac> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <mi>L</mi> <mi>b</mi> <mo>*</mo> <mfrac> <mrow> <mi>B</mi> <mi>x</mi> </mrow> <mrow> <mi>B</mi> <mi>y</mi> </mrow> </mfrac> </mrow> </mtd> <mtd> <mrow> <mi>L</mi> <mi>b</mi> </mrow> </mtd> <mtd> <mrow> <mi>L</mi> <mi>b</mi> <mo>*</mo> <mfrac> <mrow> <mo>(</mo> <mn>1</mn> <mo>-</mo> <mi>B</mi> <mi>x</mi> <mo>-</mo> <mi>B</mi> <mi>y</mi> <mo>)</mo> </mrow> <mrow> <mi>B</mi> <mi>y</mi> </mrow> </mfrac> </mrow> </mtd> </mtr> </mtable> </mfenced> <mo>;</mo> </mrow>
The XYZ values of the low current of calculating standard：
<mrow> <mo>&amp;lsqb;</mo> <mi>X</mi> <mi>Y</mi> <mi>Z</mi> <mo>_</mo> <mi>t</mi> <mi>arg</mi> <mi>e</mi> <mi>t</mi> <mo>&amp;rsqb;</mo> <mo>=</mo> <mfenced open = "(" close = ")"> <mtable> <mtr> <mtd> <mrow> <mi>R</mi> <mi>X</mi> </mrow> </mtd> <mtd> <mrow> <mi>R</mi> <mi>Y</mi> </mrow> </mtd> <mtd> <mrow> <mi>R</mi> <mi>Z</mi> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <mi>G</mi> <mi>X</mi> </mrow> </mtd> <mtd> <mrow> <mi>G</mi> <mi>Y</mi> </mrow> </mtd> <mtd> <mrow> <mi>G</mi> <mi>Z</mi> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <mi>B</mi> <mi>X</mi> </mrow> </mtd> <mtd> <mrow> <mi>B</mi> <mi>Y</mi> </mrow> </mtd> <mtd> <mrow> <mi>B</mi> <mi>Z</mi> </mrow> </mtd> </mtr> </mtable> </mfenced> <mo>=</mo> <mfenced open = "(" close = ")"> <mtable> <mtr> <mtd> <mrow> <mi>L</mi> <mi>r</mi> <mo>*</mo> <mfrac> <mrow> <mi>R</mi> <mi>x</mi> </mrow> <mrow> <mi>R</mi> <mi>y</mi> </mrow> </mfrac> </mrow> </mtd> <mtd> <mrow> <mi>L</mi> <mi>r</mi> </mrow> </mtd> <mtd> <mrow> <mi>L</mi> <mi>r</mi> <mo>*</mo> <mfrac> <mrow> <mo>(</mo> <mn>1</mn> <mo>-</mo> <mi>R</mi> <mi>x</mi> <mo>-</mo> <mi>R</mi> <mi>y</mi> <mo>)</mo> </mrow> <mrow> <mi>R</mi> <mi>y</mi> </mrow> </mfrac> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <mi>L</mi> <mi>g</mi> <mo>*</mo> <mfrac> <mrow> <mi>G</mi> <mi>x</mi> </mrow> <mrow> <mi>G</mi> <mi>y</mi> </mrow> </mfrac> </mrow> </mtd> <mtd> <mrow> <mi>L</mi> <mi>g</mi> </mrow> </mtd> <mtd> <mrow> <mi>L</mi> <mi>g</mi> <mo>*</mo> <mfrac> <mrow> <mo>(</mo> <mn>1</mn> <mo>-</mo> <mi>G</mi> <mi>x</mi> <mo>-</mo> <mi>G</mi> <mi>y</mi> <mo>)</mo> </mrow> <mrow> <mi>G</mi> <mi>y</mi> </mrow> </mfrac> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <mi>L</mi> <mi>b</mi> <mo>*</mo> <mfrac> <mrow> <mi>B</mi> <mi>x</mi> </mrow> <mrow> <mi>B</mi> <mi>y</mi> </mrow> </mfrac> </mrow> </mtd> <mtd> <mrow> <mi>L</mi> <mi>b</mi> </mrow> </mtd> <mtd> <mrow> <mi>L</mi> <mi>b</mi> <mo>*</mo> <mfrac> <mrow> <mo>(</mo> <mn>1</mn> <mo>-</mo> <mi>B</mi> <mi>x</mi> <mo>-</mo> <mi>B</mi> <mi>y</mi> <mo>)</mo> </mrow> <mrow> <mi>B</mi> <mi>y</mi> </mrow> </mfrac> </mrow> </mtd> </mtr> </mtable> </mfenced> <mo>;</mo> </mrow>
S2：The correction coefficient of two-level current LED tri coloured lanterns is generated, carries out colourity, gamma correction；
Calculate low current matrix correction coefficient：
<mrow> <mo>&amp;lsqb;</mo> <mi>c</mi> <mi>o</mi> <mi>n</mi> <mi>v</mi> <mo>_</mo> <mi>c</mi> <mi>o</mi> <mi>e</mi> <mo>&amp;rsqb;</mo> <mo>=</mo> <mfenced open = "(" close = ")"> <mtable> <mtr> <mtd> <mrow> <mi>R</mi> <mi>r</mi> </mrow> </mtd> <mtd> <mrow> <mi>R</mi> <mi>g</mi> </mrow> </mtd> <mtd> <mrow> <mi>R</mi> <mi>b</mi> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <mi>G</mi> <mi>r</mi> </mrow> </mtd> <mtd> <mrow> <mi>G</mi> <mi>g</mi> </mrow> </mtd> <mtd> <mrow> <mi>G</mi> <mi>b</mi> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <mi>B</mi> <mi>r</mi> </mrow> </mtd> <mtd> <mrow> <mi>B</mi> <mi>g</mi> </mrow> </mtd> <mtd> <mrow> <mi>B</mi> <mi>b</mi> </mrow> </mtd> </mtr> </mtable> </mfenced> <mo>;</mo> </mrow>
Obtain：[conv_coe]=[XYZ_target] * [XYZ_org]ˉ1；
Rr is display source signal when being red, the luminance factor of red light；Rg is display source signal when being red, the brightness system of green light Number；Rb is display source signal when being red, the luminance factor of blue lamp；Gr is display source signal when being green, the brightness system of red light Number；Gg is display source signal when being green, the luminance factor of green light；Gb is display source signal when being green, the brightness system of blue lamp Number；Br is display source signal when being blueness, the luminance factor of red light；Bg is display source signal when being blueness, the brightness system of green light Number；Bb is display source signal when being blueness, the luminance factor of blue lamp；
The brightness value that computer is shown, into Gamma linear operation formula：
Wherein, X is 8 gray scales registration of RGB 0~255, and b is constant, and n is gamma value, and m is the control bit of gray-scale Control device Number；Obtaining correction low current parameter is：
<mrow> <msup> <mi>Trmin</mi> <mo>,</mo> </msup> <mo>=</mo> <msup> <mrow> <mo>(</mo> <mfrac> <mrow> <mi>k</mi> <mo>*</mo> <mi>R</mi> <mi>s</mi> <mo>+</mo> <mi>b</mi> </mrow> <mn>255</mn> </mfrac> <mo>)</mo> </mrow> <mi>n</mi> </msup> <mo>*</mo> <mrow> <mo>(</mo> <msup> <mn>2</mn> <mi>m</mi> </msup> <mo>-</mo> <mn>1</mn> <mo>)</mo> </mrow> <mo>*</mo> <mi>R</mi> <mi>r</mi> <mo>+</mo> <msup> <mrow> <mo>(</mo> <mfrac> <mrow> <mi>k</mi> <mo>*</mo> <mi>G</mi> <mi>s</mi> <mo>+</mo> <mi>b</mi> </mrow> <mn>255</mn> </mfrac> <mo>)</mo> </mrow> <mi>n</mi> </msup> <mo>*</mo> <mrow> <mo>(</mo> <msup> <mn>2</mn> <mi>m</mi> </msup> <mo>-</mo> <mn>1</mn> <mo>)</mo> </mrow> <mo>*</mo> <mi>G</mi> <mi>r</mi> <mo>+</mo> <msup> <mrow> <mo>(</mo> <mfrac> <mrow> <mi>k</mi> <mo>*</mo> <mi>B</mi> <mi>s</mi> <mo>+</mo> <mi>b</mi> </mrow> <mn>255</mn> </mfrac> <mo>)</mo> </mrow> <mi>n</mi> </msup> <mo>*</mo> <mrow> <mo>(</mo> <msup> <mn>2</mn> <mi>m</mi> </msup> <mo>-</mo> <mn>1</mn> <mo>)</mo> </mrow> <mo>*</mo> <mi>B</mi> <mi>r</mi> <mo>;</mo> </mrow>
<mrow> <msup> <mi>Tgmin</mi> <mo>,</mo> </msup> <mo>=</mo> <msup> <mrow> <mo>(</mo> <mfrac> <mrow> <mi>k</mi> <mo>*</mo> <mi>R</mi> <mi>s</mi> <mo>+</mo> <mi>b</mi> </mrow> <mn>255</mn> </mfrac> <mo>)</mo> </mrow> <mi>n</mi> </msup> <mo>*</mo> <mrow> <mo>(</mo> <msup> <mn>2</mn> <mi>m</mi> </msup> <mo>-</mo> <mn>1</mn> <mo>)</mo> </mrow> <mo>*</mo> <mi>R</mi> <mi>g</mi> <mo>+</mo> <msup> <mrow> <mo>(</mo> <mfrac> <mrow> <mi>k</mi> <mo>*</mo> <mi>G</mi> <mi>s</mi> <mo>+</mo> <mi>b</mi> </mrow> <mn>255</mn> </mfrac> <mo>)</mo> </mrow> <mi>n</mi> </msup> <mo>*</mo> <mrow> <mo>(</mo> <msup> <mn>2</mn> <mi>m</mi> </msup> <mo>-</mo> <mn>1</mn> <mo>)</mo> </mrow> <mo>*</mo> <mi>G</mi> <mi>g</mi> <mo>+</mo> <mrow> <mo>(</mo> <mfrac> <mrow> <mi>k</mi> <mo>*</mo> <mi>B</mi> <mi>s</mi> <mo>+</mo> <mi>b</mi> </mrow> <mn>255</mn> </mfrac> <mo>)</mo> </mrow> <mi>n</mi> <mo>*</mo> <mrow> <mo>(</mo> <msup> <mn>2</mn> <mi>m</mi> </msup> <mo>-</mo> <mn>1</mn> <mo>)</mo> </mrow> <mo>*</mo> <mi>B</mi> <mi>g</mi> <mo>;</mo> </mrow>
<mrow> <msup> <mi>Tbmin</mi> <mo>,</mo> </msup> <mo>=</mo> <msup> <mrow> <mo>(</mo> <mfrac> <mrow> <mi>k</mi> <mo>*</mo> <mi>R</mi> <mi>s</mi> <mo>+</mo> <mi>b</mi> </mrow> <mn>255</mn> </mfrac> <mo>)</mo> </mrow> <mi>n</mi> </msup> <mo>*</mo> <mrow> <mo>(</mo> <msup> <mn>2</mn> <mi>m</mi> </msup> <mo>-</mo> <mn>1</mn> <mo>)</mo> </mrow> <mo>*</mo> <mi>R</mi> <mi>b</mi> <mo>+</mo> <msup> <mrow> <mo>(</mo> <mfrac> <mrow> <mi>k</mi> <mo>*</mo> <mi>G</mi> <mi>s</mi> <mo>+</mo> <mi>b</mi> </mrow> <mn>255</mn> </mfrac> <mo>)</mo> </mrow> <mi>n</mi> </msup> <mo>*</mo> <mrow> <mo>(</mo> <msup> <mn>2</mn> <mi>m</mi> </msup> <mo>-</mo> <mn>1</mn> <mo>)</mo> </mrow> <mo>*</mo> <mi>G</mi> <mi>b</mi> <mo>+</mo> <msup> <mrow> <mo>(</mo> <mfrac> <mrow> <mi>k</mi> <mo>*</mo> <mi>B</mi> <mi>s</mi> <mo>+</mo> <mi>b</mi> </mrow> <mn>255</mn> </mfrac> <mo>)</mo> </mrow> <mi>n</mi> </msup> <mo>*</mo> <mrow> <mo>(</mo> <msup> <mn>2</mn> <mi>m</mi> </msup> <mo>-</mo> <mn>1</mn> <mo>)</mo> </mrow> <mo>*</mo> <mi>B</mi> <mi>b</mi> <mo>;</mo> </mrow>
The LED total amounts that shine are made of the sum of brightness of current：Trmin ' * Lrmin '+Trmax " * Lrmax "=Trall* Lrall；
It is known：Trmin ', Lrmin ', Lrmax ", Trall, Lrall, try to achieve the time Trmax " of high current：
<mrow> <msup> <mi>Trmax</mi> <mrow> <mo>&amp;prime;</mo> <mo>&amp;prime;</mo> </mrow> </msup> <mo>=</mo> <mfrac> <mrow> <mi>T</mi> <mi>r</mi> <mi>a</mi> <mi>l</mi> <mi>l</mi> <mo>*</mo> <mi>L</mi> <mi>r</mi> <mi>a</mi> <mi>l</mi> <mi>l</mi> <mo>-</mo> <msup> <mi>Trmin</mi> <mo>&amp;prime;</mo> </msup> <mo>*</mo> <msup> <mi>Lrmin</mi> <mo>&amp;prime;</mo> </msup> </mrow> <mrow> <msup> <mi>Lrmax</mi> <mrow> <mo>&amp;prime;</mo> <mo>&amp;prime;</mo> </mrow> </msup> </mrow> </mfrac> </mrow>
Correct the actual displayed parameter of high current：
Trmax_ajust=Tr " max*Rr "+Tg " max*Gr+Tb " max*Br；
Tgmax_ajust=Tr " max*Rg "+Tg " max*Gg+Tb " max*Bg；
Tbmax_ajust=Tr " max*Rb "+Tg " max*Gb+Tb " max*Bb；
S3：Calculate the time T needed for two-level current driving LED tri coloured lanterns：When pcs signal display parameter value, time T is obtained； Then the gray level control of single primary colours is carried out, the fluorescent lifetime of LED is controlled by controlling pulse width, realizes the aobvious of gray level Show.
2. the control method of the LED standard screen according to claim 1 based on two-level current, it is characterised in that min 30 Below grayscale.
CN201711175042.9A 2017-11-22 2017-11-22 A kind of control method of the LED standard screen based on two-level current Pending CN107945730A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110570811A (en) * 2019-09-11 2019-12-13 宋清海 LED color gamut correction method
WO2019237757A1 (en) * 2018-06-13 2019-12-19 广州市浩洋电子股份有限公司 Color correction method for multi-color lamp
CN110930934A (en) * 2018-09-20 2020-03-27 深圳市海讯高科技术有限公司 Correction algorithm for standardized product of display screen

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101866621A (en) * 2010-06-03 2010-10-20 北京中庆微数字设备开发有限公司 LED display screen correction system and method
CN102074206A (en) * 2009-11-20 2011-05-25 京东方科技集团股份有限公司 Color correction method, color correction device and LED color correction system
CN103236251A (en) * 2013-04-01 2013-08-07 广东威创视讯科技股份有限公司 Method and device for calibrating uniformity of splicing wall
CN103354087A (en) * 2013-07-01 2013-10-16 广东威创视讯科技股份有限公司 Method and system for color correction of tiled display device
CN103489411A (en) * 2013-09-24 2014-01-01 广东威创视讯科技股份有限公司 Display-screen color maintenance method and system
CN104851390A (en) * 2015-05-20 2015-08-19 西安诺瓦电子科技有限公司 LED display pointwise correction method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102074206A (en) * 2009-11-20 2011-05-25 京东方科技集团股份有限公司 Color correction method, color correction device and LED color correction system
CN101866621A (en) * 2010-06-03 2010-10-20 北京中庆微数字设备开发有限公司 LED display screen correction system and method
CN103236251A (en) * 2013-04-01 2013-08-07 广东威创视讯科技股份有限公司 Method and device for calibrating uniformity of splicing wall
CN103354087A (en) * 2013-07-01 2013-10-16 广东威创视讯科技股份有限公司 Method and system for color correction of tiled display device
CN103489411A (en) * 2013-09-24 2014-01-01 广东威创视讯科技股份有限公司 Display-screen color maintenance method and system
CN104851390A (en) * 2015-05-20 2015-08-19 西安诺瓦电子科技有限公司 LED display pointwise correction method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019237757A1 (en) * 2018-06-13 2019-12-19 广州市浩洋电子股份有限公司 Color correction method for multi-color lamp
CN110930934A (en) * 2018-09-20 2020-03-27 深圳市海讯高科技术有限公司 Correction algorithm for standardized product of display screen
CN110570811A (en) * 2019-09-11 2019-12-13 宋清海 LED color gamut correction method

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