CN104167174B

CN104167174B - A kind of method and device of LED display white balance adjusting

Info

Publication number: CN104167174B
Application number: CN201410378262.1A
Authority: CN
Inventors: 张建军; 梁德斌; 王玉彬; 成锐
Original assignee: Shenzhen Aoto Electronics Co Ltd
Current assignee: Shenzhen Aoto Electronics Co Ltd
Priority date: 2014-08-01
Filing date: 2014-08-01
Publication date: 2016-08-31
Anticipated expiration: 2034-08-01
Also published as: CN104167174A

Abstract

The invention provides the method and device of a kind of LED display white balance adjusting, belong to field of LED display.In the present invention, preset target brightness value, target X-axis chromaticity coordinates value and target Y-axis chromaticity coordinates value；According to initial red gain value, initial green yield value and initial blue gain value regulation LED display；Feedback brightness value, feedback X-axis chromaticity coordinates value and feedback Y-axis chromaticity coordinates value are detected；Obtain the difference of its correspondence；When in difference at least one interval beyond its ranges of error values, obtain target red gain value, target green yield value and target blue gain value according to feedback brightness value, feedback X-axis chromaticity coordinates value and feedback Y-axis chromaticity coordinates value；And regulate LED display, and continue feedback brightness value, feedback X-axis chromaticity coordinates value and feedback Y-axis chromaticity coordinates value are detected.The present invention, by the method and device of described LED display white balance adjusting, improves the efficiency of LED display white balance adjusting.

Description

A kind of method and device of LED display white balance adjusting

Technical field

The present invention relates to field of LED display, particularly to the method and device of a kind of LED display white balance adjusting.

Background technology

Prior art, AWB based on RGB three primary color LED backlight lamp adjustment system and method (number of patent application: CN201010533577), it is automatically adjusted flow process and is: (1), by controller circuitry respectively with color sensor Acquisition Circuit, red Lamp drive circuit, green light drive circuit and blue lamp drive circuit are connected, by red light drive circuit, green light drive circuit and indigo plant Lamp drive circuit is connected with red light, green light and blue lamp diode array respectively, then powers on, lights according to the default value arranged LED (Light Emitting Diode, light emitting diode) backlight；(2), main controller circuit reads color sensor collection Red (R), green (G) of circuit, blue (B) trichroism data.Main controller circuit is according to red (R), green (G), blue (B) trichroism data conversion For CIE (International Commission on Illumination, international luminous lighting committee) tristimulus values X, Y, Z, calculate current chromaticity coordinates value x, y further according to CIE tristimulus values X, Y, Z, and then calculate according to chromaticity coordinates value and work as Front color temperature value.(3), the color temperature value of the color temperature value calculated by step (2) with setting is compared, if calculating by main controller circuit Color temperature value less than the color temperature value set, then increase the driving dutycycle of blue lamp, reduce the driving dutycycle of red light, be then back to Step (2) re-reads red (R), green (G) of color sensor Acquisition Circuit, blue (B) trichroism data, carries out next circulation, Progressively re-operate according to above-mentioned steps；If the color temperature value calculated is bigger than the color temperature value set, then increase the driving duty of red light Ratio, reduces the dutycycle of blue lamp, is then back to step (2) and re-reads red (R), green (G) of color sensor Acquisition Circuit, indigo plant (B) trichroism data, carry out next circulation, progressively re-operate according to above-mentioned steps；If the color temperature value calculated and the color of setting Temperature value is equal, then terminate.

Trichroism regulation dutycycle is judged by simple feedback size, can only be by the control of Step wise approximation desired value Method, efficiency is low, the longest.For LED display, white balance not only needs white balance, the most also brightness Requirement.One LED pixel point is to be combined by three kinds of colors, and the brightness of this pixel is by the brightness decision of three kinds of colors 's.Aforementioned background art, is only by the AWB regulation of three-color LED backlight, to brightness not requirement.If but Add brightness requirement, then using the control method of this Step wise approximation desired value, efficiency is lower, the most longer.

Summary of the invention

The invention provides the method and device of a kind of LED display white balance adjusting, improve LED display white balance The efficiency of regulation.

On the one hand, a kind of method that the invention provides LED display white balance adjusting, described method includes:

A. preset target brightness value, target X-axis chromaticity coordinates value and target Y-axis chromaticity coordinates value；

B. according to initial red gain value, initial green yield value and initial blue gain value regulation LED display；

C. feedback brightness value, feedback X-axis chromaticity coordinates value and feedback Y-axis chromaticity coordinates value are detected；

D. brightness value difference is obtained according to described feedback brightness value and described target brightness value；

E. X-axis chromaticity coordinates value difference value is obtained according to described feedback X-axis chromaticity coordinates value and described target X-axis chromaticity coordinates value；

F. Y-axis chromaticity coordinates value difference value is obtained according to described feedback Y-axis chromaticity coordinates value and described target Y-axis chromaticity coordinates value；

G. when in described brightness value difference, described X-axis chromaticity coordinates value difference value and described Y-axis chromaticity coordinates value difference value at least One interval beyond its ranges of error values, according to described feedback brightness value, described feedback X-axis chromaticity coordinates value and described feedback Y-axis Chromaticity coordinates value obtains target red gain value, target green yield value and target blue gain value；

H. institute is regulated according to described target red gain value, described target green yield value and described target blue gain value State LED display, and perform step C.

Second aspect, the invention provides the device of a kind of LED display white balance adjusting, and described device includes:

Presetting module, for preset target brightness value, target X-axis chromaticity coordinates value and target Y-axis chromaticity coordinates value；

First adjustment module, for adjusting according to initial red gain value, initial green yield value and initial blue gain value Joint LED display；

First detection module, for examining feedback brightness value, feedback X-axis chromaticity coordinates value and feedback Y-axis chromaticity coordinates value Survey；

First acquisition module, for obtaining brightness value difference according to described feedback brightness value and described target brightness value；

Second acquisition module, for obtaining X-axis according to described feedback X-axis chromaticity coordinates value and described target X-axis chromaticity coordinates value Chromaticity coordinates value difference value；

3rd acquisition module, for obtaining Y-axis according to described feedback Y-axis chromaticity coordinates value and described target Y-axis chromaticity coordinates value Chromaticity coordinates value difference value；

4th acquisition module, for when described brightness value difference, described X-axis chromaticity coordinates value difference value and described Y-axis chromaticity coordinates In value difference value at least one interval beyond its ranges of error values, according to described feedback brightness value, described feedback X-axis chromaticity coordinates Value and described feedback Y-axis chromaticity coordinates value obtain target red gain value, target green yield value and target blue gain value；

Second adjustment module, blue according to described target red gain value, described target green yield value and described target Yield value regulates described LED display.

In the present invention, due to preset target brightness value, target X-axis chromaticity coordinates value and target Y-axis chromaticity coordinates value；According to just Beginning red gain value, initial green yield value and initial blue gain value regulation LED display；To feedback brightness value, feedback X-axis Chromaticity coordinates value and feedback Y-axis chromaticity coordinates value detect；Obtain brightness value difference, X-axis chromaticity coordinates value difference value and Y-axis chromaticity coordinates value Difference；When in brightness value difference, X-axis chromaticity coordinates value difference value and Y-axis chromaticity coordinates value difference value at least one beyond its error amount Range intervals, obtains target red gain value, mesh according to feedback brightness value, feedback X-axis chromaticity coordinates value and feedback Y-axis chromaticity coordinates value Mark green gain value and target blue gain value；According to target red gain value, target green yield value and target blue gain Value regulation LED display, and continue feedback brightness value, feedback X-axis chromaticity coordinates value and feedback Y-axis chromaticity coordinates value are detected, This improves the efficiency of LED display white balance adjusting.

Accompanying drawing explanation

For the technical scheme being illustrated more clearly that in the embodiment of the present invention, in embodiment being described below required for make Accompanying drawing be briefly described, it should be apparent that, below describe in accompanying drawing be only some embodiments of the present invention, for From the point of view of those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other according to these accompanying drawings Accompanying drawing.

The method one flow chart of the LED display white balance adjusting that Fig. 1 provides for the embodiment of the present invention one；

The method another kind flow chart of the LED display white balance adjusting that Fig. 2 provides for the embodiment of the present invention one；

The device one structural representation of the LED display white balance adjusting that Fig. 3 provides for the embodiment of the present invention two；

The device another kind structural representation of a kind of LED display white balance adjusting that Fig. 4 provides for the embodiment of the present invention two Figure.

Detailed description of the invention

For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention Formula is described in further detail.

LED display white balance chromaticity coordinates is based on the principle of three primary colours, by red LED, green LED, the wavelength of blue led (chromaticity coordinates), brightness ratio determine.In LED display industry, the usual way of white balance adjusting is: the red LED of selection, green Color LED, the wavelength of blue led are constant basis, obtain target by regulation red LED, green LED, the brightness ratio of blue led White balance value (target brightness value and target color coordinates value).Illustrate below in conjunction with specific embodiment.

Embodiment one:

The embodiment of the present invention one provides a kind of method of LED display white balance adjusting, sees Fig. 1, and LED display is white The method of balance adjustment comprises the following steps:

101. preset target brightness values, target X-axis chromaticity coordinates value and target Y-axis chromaticity coordinates value.Target brightness value, target X Axle chromaticity coordinates value and target Y-axis chromaticity coordinates value are the targeted parameter value that LED display white balance adjusting need to reach.

102. according to initial red gain value, initial green yield value and initial blue gain value regulation LED display.In advance If initial red gain value, initial green yield value and initial blue gain value, and according to initial red gain value, initial green Yield value and initial blue gain value regulation LED display.

103. pairs are fed back brightness value, feedback X-axis chromaticity coordinates values and feedback Y-axis chromaticity coordinates value and detect.According to the reddest After color yield value, initial green yield value and initial blue gain value regulation LED display, measure the anti-of LED display reality Feedback brightness value, feedback X-axis chromaticity coordinates value and feedback Y-axis chromaticity coordinates value.

104. obtain brightness value difference according to feedback brightness value and target brightness value.Brightness value difference is equal to feedback brightness value Difference with target brightness value.

105. obtain X-axis chromaticity coordinates value difference value according to feedback X-axis chromaticity coordinates value and target X-axis chromaticity coordinates value.X-axis chromaticity coordinates Value difference value is equal to feedback X-axis chromaticity coordinates value and the difference of target X-axis chromaticity coordinates value.

106. obtain Y-axis chromaticity coordinates value difference value according to feedback Y-axis chromaticity coordinates value and target Y-axis chromaticity coordinates value.Y-axis chromaticity coordinates Value difference value is equal to feedback Y-axis chromaticity coordinates value and the difference of target Y-axis chromaticity coordinates value.

107. when in brightness value difference, X-axis chromaticity coordinates value difference value and Y-axis chromaticity coordinates value difference value at least one beyond it Ranges of error values is interval, obtains target redness according to feedback brightness value, feedback X-axis chromaticity coordinates value and feedback Y-axis chromaticity coordinates value and increases Benefit value, target green yield value and target blue gain value.

Target red gain value, mesh is obtained according to feedback brightness value, feedback X-axis chromaticity coordinates value and feedback Y-axis chromaticity coordinates value Mark green gain value and target blue gain value will be particularly as follows: will feed back brightness value, feedback X-axis chromaticity coordinates value and feedback Y-axis color and sit Scale value substitutes into mathematical model and calculates target red gain value, target green yield value and target blue gain value, and mathematical model is

\{\begin{matrix} \frac{L_{wb}}{W_{yb}} - \frac{L_{w}}{W_{y}} = a_{1} \frac{1}{R_{y}} Δ G_{R} + a_{2} \frac{1}{G_{y}} Δ G_{G} + a_{3} + \frac{1}{B_{y}} Δ G_{B} \\ \frac{L_{wb}}{W_{yb}} W_{xb} - \frac{L_{w}}{W_{y}} W_{x} = a_{1} \frac{R_{x}}{R_{y}} Δ G_{R} + a_{2} \frac{G_{x}}{G_{y}} Δ G_{G} + a_{3} \frac{B_{x}}{B_{y}} Δ G_{B} \\ L_{wb} - L_{w} = a_{1} Δ G_{R} + a_{2} Δ G_{G} + a_{3} Δ G_{B} \\ Δ G_{R} = G_{R + 1} - G_{R} \\ Δ G_{G} = G_{G + 1} - G_{G} \\ Δ G_{B} = G_{B + 1} - G_{B} \end{matrix},

Wherein, L_wbFor feedback brightness value, L_wFor mesh Mark brightness value, W_xbFor feedback X-axis chromaticity coordinates value, W_ybFor feedback Y-axis chromaticity coordinates value, W_xFor target X-axis chromaticity coordinates value, W_yFor target Y-axis chromaticity coordinates value, a₁For parameter 1, a₂For parameter 2, a₃For parameter 3, R_xFor the X-axis chromaticity coordinates value of canonical red, R_yRed for standard The Y-axis chromaticity coordinates value of color, G_xFor the X-axis chromaticity coordinates value of standard green, G_yFor the Y-axis chromaticity coordinates value of standard green, B_xFor standard blue The X-axis chromaticity coordinates value of color, B_yFor the Y-axis chromaticity coordinates value that standard is blue, Δ G_RFor red gain difference, Δ G_GPoor for green gain Value, Δ G_BFor blue gain difference, G_R+1For target red gain value, G_G+1For target green yield value, G_B+1Increase for target blueness Benefit value, G_RFor current red gain value, G_GFor current green gain value, G_BFor current blue gain value.

According to light principle, each monochromatic brightness value of can deriving and target brightness value, the relation such as first of target colour temperature

L_w=L_R+L_G+L_B

Equation group

\{\begin{matrix} W_{y} = \frac{L_{R} + L_{G} + L_{B}}{\frac{1}{R_{y}} L_{R} + \frac{1}{G_{y}} L_{G} + \frac{1}{B_{y}} L_{B}} \\ W_{x} = \frac{\frac{R_{x}}{R_{y}} L_{R} + \frac{G_{x}}{G_{y}} L_{G} + \frac{B_{x}}{B_{y}} L_{B}}{\frac{1}{R_{y}} L_{R} + \frac{1}{G_{y}} L_{G} + \frac{1}{B_{y}} L_{B}} \end{matrix},

Wherein, L_RFor red luma value, L_GFor green Colour brightness value, L_BFor blue intensity values, the implication of remaining parameter is shown in above-mentioned parameter interpretation.For LED display, Bai Ping The flow process that weighing apparatus is automatically adjusted is to target value L_w、W_x、W_y, by regulation L_R、L_G、L_BThree parameters meet desired value.

Assume that the relation between each colour brightness and assorted gain is linear, such as the second equation group

\{\begin{matrix} L_{R} = a_{1} G_{R} + b_{1} \\ L_{G} = a_{2} G_{G} + b_{2} \\ L_{B} = a_{3} G_{B} + b_{3} \end{matrix},

Wherein, a₁、a₂、a₃、b₁、b₂And b₃It it is all parameter.

First equation group is carried out abbreviation, obtains third party's journey group

\{\begin{matrix} \frac{L_{w}}{W_{y}} = \frac{1}{R_{y}} L_{R} + \frac{1}{G_{y}} L_{G} + \frac{1}{B_{y}} L_{B} \\ \frac{L_{w}}{W_{y}} W_{y} = \frac{R_{x}}{R_{y}} L_{R} + \frac{G_{x}}{G_{y}} L_{G} + \frac{B_{x}}{B_{y}} L_{B} \\ L_{w} = L_{R} + L_{G} + L_{B} \end{matrix},

Wherein, the implication of parameter is shown in above-mentioned parameter interpretation.

Assume that desired value is L_w、W_x、W_y, value of feedback is L_wb、W_xb、W_yb, both are brought into third party's journey group, and subtracts each other, can Obtain the 4th equation group

\{\begin{matrix} \frac{L_{wb}}{W_{yb}} - \frac{L_{w}}{W_{y}} = \frac{1}{R_{y}} (L_{R + 1} - L_{R}) + \frac{1}{G_{y}} (L_{G + 1} - L_{G}) + \frac{1}{B_{y}} (L_{B + 1} - L_{B}) \\ \frac{L_{wb}}{W_{yb}} W_{xb} - \frac{L_{x}}{W_{y}} W_{x} = \frac{R_{x}}{R_{y}} (L_{R + 1} - L_{R}) + \frac{G_{x}}{G_{y}} (L_{G + 1} - L_{G}) + \frac{B_{x}}{B_{y}} (L_{B + 1} - L_{B}) \\ L_{wb} - L_{w} = (L_{R + 1} - L_{R}) + (L_{G + 1} - L_{G}) + (L_{B + 1} - L_{B}) \end{matrix},

Wherein, L_R+1Brightness value, L is fed back for redness_G+1Brightness value, L is fed back for green_B+1Brightness value, containing of remaining parameter is fed back for blueness Justice is shown in above-mentioned parameter interpretation.

Bring the second equation group into the 4th equation group, mathematical model can be obtained

\{\begin{matrix} \frac{L_{wb}}{W_{yb}} - \frac{L_{w}}{W_{y}} = a_{1} \frac{1}{R_{y}} Δ G_{R} + a_{2} \frac{1}{G_{y}} Δ G_{G} + a_{3} + \frac{1}{B_{y}} Δ G_{B} \\ \frac{L_{wb}}{W_{yb}} W_{xb} - \frac{L_{w}}{W_{y}} W_{x} = a_{1} \frac{R_{x}}{R_{y}} Δ G_{R} + a_{2} \frac{G_{x}}{G_{y}} Δ G_{G} + a_{3} \frac{B_{x}}{B_{y}} Δ G_{B} \\ L_{wb} - L_{w} = a_{1} Δ G_{R} + a_{2} Δ G_{G} + a_{3} Δ G_{B} \\ Δ G_{R} = G_{R + 1} - G_{R} \\ Δ G_{G} = G_{G + 1} - G_{G} \\ Δ G_{B} = G_{B + 1} - G_{B} \end{matrix}

Wherein, the implication of parameter is shown in above-mentioned parameter Explain.

108. regulate LED display according to target red gain value, target green yield value and target blue gain value, and Perform step 103.By circulation execution step 103 to step 108, finally make brightness value difference, X-axis chromaticity coordinates value difference value and Y Axle chromaticity coordinates value difference value is all interval at ranges of error values, reaches the target of LED display white balance adjusting.

Additionally, in an alternative embodiment of the invention, as in figure 2 it is shown, can also include between step 106 and step 107 Step 106-1 and 106-2.

106-1. get parms 1 value, the value of parameter 2 and the value of parameter 3.The relation of each colored lights brightness and gain is not Proportional, only on the basis of meeting certain hardware condition, and just meet linear degree relatively in certain gain ranging Good linear relationship.It is now assumed that the two condition is the most satisfied, can obtain linear relationship between each colour brightness and gain (see Second equation group), this linear relationship get parms with at least brightness value according at least two preset gain value and (red corresponding joins Several 1, green corresponding parameter 2, blue corresponding parameter 3) value.

Red gain value regulation LED display is preset according at least two；Respectively at least two is preset red gain value Corresponding at least two red luma value detects；Red gain value and at least two red luma is preset according at least two Value get parms 1 value.

Green gain value regulation LED display is preset according at least two；Respectively at least two is preset green gain value Corresponding at least two Green brightness value detects；Green gain value and at least two Green brightness is preset according at least two Value get parms 2 value.

Blue gain value regulation LED display is preset according at least two；Respectively at least two is preset blue gain value Corresponding at least two blue intensity values detects；Blue gain value and at least two blue luminences is preset according at least two Value get parms 3 value.

The X-axis chromaticity coordinates value of canonical red, the Y-axis chromaticity coordinates value of canonical red, the X-axis color of standard green are sat by 106-2. The X-axis chromaticity coordinates value of scale value, the Y-axis chromaticity coordinates value of standard green, standard blueness, the Y-axis chromaticity coordinates value of standard blueness are examined Survey.

The present embodiment is by preset target brightness value, target X-axis chromaticity coordinates value and target Y-axis chromaticity coordinates value；According to initially Red gain value, initial green yield value and initial blue gain value regulation LED display；To feedback brightness value, feedback X-axis color Coordinate figure and feedback Y-axis chromaticity coordinates value detect；Obtain brightness value difference, X-axis chromaticity coordinates value difference value and Y-axis chromaticity coordinates value difference Value；When in brightness value difference, X-axis chromaticity coordinates value difference value and Y-axis chromaticity coordinates value difference value at least one beyond its error amount model Enclose interval, obtain target red gain value, target according to feedback brightness value, feedback X-axis chromaticity coordinates value and feedback Y-axis chromaticity coordinates value Green gain value and target blue gain value；According to target red gain value, target green yield value and target blue gain value Regulation LED display, and continue feedback brightness value, feedback X-axis chromaticity coordinates value and feedback Y-axis chromaticity coordinates value are detected, because of This, improve the efficiency of LED display white balance adjusting.

Embodiment two:

The embodiment of the present invention two provides the device of a kind of LED display white balance adjusting, as it is shown on figure 3, LED display The device 30 of white balance adjusting includes that presetting module the 310, first adjustment module the 320, first acquisition module 340, second obtains mould Block the 350, the 3rd acquisition module the 360, the 4th acquisition module 370 and the second adjustment module 380.

Presetting module 310, for preset target brightness value, target X-axis chromaticity coordinates value and target Y-axis chromaticity coordinates value.

First adjustment module 320, for according to initial red gain value, initial green yield value and initial blue gain value Regulation LED display.

First detection module 330, for carrying out feedback brightness value, feedback X-axis chromaticity coordinates value and feedback Y-axis chromaticity coordinates value Detection.

First acquisition module 340, for obtaining brightness value difference according to feedback brightness value and target brightness value.

Second acquisition module 350, for obtaining X-axis chromaticity coordinates according to feedback X-axis chromaticity coordinates value and target X-axis chromaticity coordinates value Value difference value.

3rd acquisition module 360, for obtaining Y-axis chromaticity coordinates according to feedback Y-axis chromaticity coordinates value and target Y-axis chromaticity coordinates value Value difference value.

4th acquisition module 370, for when in brightness value difference, X-axis chromaticity coordinates value difference value and Y-axis chromaticity coordinates value difference value At least one exceeds its ranges of error values interval, according to feedback brightness value, feedback X-axis chromaticity coordinates value and feedback Y-axis chromaticity coordinates Value obtains target red gain value, target green yield value and target blue gain value.

It is red that 4th acquisition module obtains target according to feedback brightness value, feedback X-axis chromaticity coordinates value and feedback Y-axis chromaticity coordinates value Color yield value, target green yield value and target blue gain value particularly as follows: will feedback brightness value, feedback X-axis chromaticity coordinates value and Feedback Y-axis chromaticity coordinates value is brought mathematical model into and is calculated target red gain value, target green yield value and target blue gain value, Mathematical model is

\{\begin{matrix} \frac{L_{wb}}{W_{yb}} - \frac{L_{w}}{W_{y}} = a_{1} \frac{1}{R_{y}} Δ G_{R} + a_{2} \frac{1}{G_{y}} Δ G_{G} + a_{3} + \frac{1}{B_{y}} Δ G_{B} \\ \frac{L_{wb}}{W_{yb}} W_{xb} - \frac{L_{w}}{W_{y}} W_{x} = a_{1} \frac{R_{x}}{R_{y}} Δ G_{R} + a_{2} \frac{G_{x}}{G_{y}} Δ G_{G} + a_{3} \frac{B_{x}}{B_{y}} Δ G_{B} \\ L_{wb} - L_{w} = a_{1} Δ G_{R} + a_{2} Δ G_{G} + a_{3} Δ G_{B} \\ Δ G_{R} = G_{R + 1} - G_{R} \\ Δ G_{G} = G_{G + 1} - G_{G} \\ Δ G_{B} = G_{B + 1} - G_{B} \end{matrix},

Wherein, L_wbBright for feedback Angle value, L_wFor target brightness value, W_xbFor feedback X-axis chromaticity coordinates value, W_ybFor feedback Y-axis chromaticity coordinates value, W_xFor target X-axis chromaticity coordinates Value, W_yFor target Y-axis chromaticity coordinates value, a₁For parameter 1, a₂For parameter 2, a₃For parameter 3, R_xFor the X-axis chromaticity coordinates value of canonical red, R_yFor the Y-axis chromaticity coordinates value of canonical red, G_xFor the X-axis chromaticity coordinates value of standard green, G_yFor the Y-axis chromaticity coordinates value of standard green, B_xFor the X-axis chromaticity coordinates value that standard is blue, B_yFor the Y-axis chromaticity coordinates value that standard is blue, Δ G_RFor red gain difference, Δ G_GFor Green gain difference, Δ G_BFor blue gain difference, G_R+1For target red gain value, G_G+1For target green yield value, G_B+1For Target blue gain value, G_RFor current red gain value, G_GFor current green gain value, G_BFor current blue gain value.

Second adjustment module 380, regulates according to target red gain value, target green yield value and target blue gain value LED display.

Additionally, in an alternative embodiment of the invention, as shown in Figure 4, the device 40 of a kind of LED display white balance adjusting is also Including the second detection module 360-1 and the 5th acquisition module 360-2.

Second detection module 360-1, for the X-axis chromaticity coordinates value of canonical red, the Y-axis chromaticity coordinates value of canonical red, The Y that the X-axis chromaticity coordinates value of the X-axis chromaticity coordinates value of standard green, the Y-axis chromaticity coordinates value of standard green, standard blueness, standard are blue Axle chromaticity coordinates value detects.

5th acquisition module 360-2, for get parms 1 value, the value of parameter 2 and the value of parameter 3.

The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.

One of ordinary skill in the art will appreciate that all or part of step realizing above-described embodiment can pass through hardware Completing, it is also possible to instruct relevant hardware by program and complete, described program can be stored in a kind of computer-readable In storage medium, storage medium mentioned above can be read only memory, disk or CD etc..

The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention and Within principle, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.

Claims

1. the method for a LED display white balance adjusting, it is characterised in that described method includes:

G. as at least in described brightness value difference, described X-axis chromaticity coordinates value difference value and described Y-axis chromaticity coordinates value difference value Interval beyond its ranges of error values, sit according to described feedback brightness value, described feedback X-axis chromaticity coordinates value and described feedback Y-axis color Scale value obtains target red gain value, target green yield value and target blue gain value；

H. regulate described according to described target red gain value, described target green yield value and described target blue gain value LED display, and perform step C；

Described red according to described feedback brightness value, described feedback X-axis chromaticity coordinates value and described feedback Y-axis chromaticity coordinates value acquisition target Color yield value, target green yield value and target blue gain value particularly as follows:

Described feedback brightness value, described feedback X-axis chromaticity coordinates value and described feedback Y-axis chromaticity coordinates value are substituted into mathematical model calculate Target red gain value, target green yield value and target blue gain value, described mathematical model is

\{\begin{matrix} \frac{L_{w b}}{W_{y b}} - \frac{L_{w}}{W_{y}} = a_{1} \frac{1}{R_{y}} {ΔG}_{R} + a_{2} \frac{1}{G_{y}} {ΔG}_{G} + a_{3} \frac{1}{B_{y}} {ΔG}_{B} \\ \frac{L_{w b}}{W_{y b}} W_{x b} - \frac{L_{w}}{W_{y}} W_{x} = a_{1} \frac{R_{x}}{R_{y}} {ΔG}_{R} + a_{2} \frac{G_{x}}{G_{y}} {ΔG}_{G} + a_{3} \frac{B_{x}}{B_{y}} {ΔG}_{B} \\ L_{w b} - L_{w} = a_{1} {ΔG}_{R} + a_{2} {ΔG}_{G} + a_{3} {ΔG}_{B} \\ {ΔG}_{R} = G_{R + 1} - G_{R} \\ {ΔG}_{G} = G_{G + 1} - G_{G} \\ {ΔG}_{B} = G_{B + 1} - G_{B} \end{matrix},

Wherein, L_wbFor described feedback brightness value, L_w For described target brightness value, W_xbFor described feedback X-axis chromaticity coordinates value, W_ybFor described feedback Y-axis chromaticity coordinates value, W_xFor described target X-axis chromaticity coordinates value, W_yFor described target Y-axis chromaticity coordinates value, a₁For parameter 1, a₂For parameter 2, a₃For parameter 3, R_xFor canonical red X-axis chromaticity coordinates value, R_yFor the Y-axis chromaticity coordinates value of canonical red, G_xFor the X-axis chromaticity coordinates value of standard green, G_yFor standard green Y-axis chromaticity coordinates value, B_xFor the X-axis chromaticity coordinates value that standard is blue, B_yFor the Y-axis chromaticity coordinates value that standard is blue, Δ G_RIncrease for redness Benefit difference, Δ G_GFor green gain difference, Δ G_BFor blue gain difference, G_R+1For described target red gain value, G_G+1For described Target green yield value, G_B+1For described target blue gain value, G_RFor current red gain value, G_GFor current green gain value, G_BFor current blue gain value.

Method the most according to claim 1, it is characterised in that described method is further comprising the steps of:

To the X-axis chromaticity coordinates value of described canonical red, the Y-axis chromaticity coordinates value of described canonical red, the X-axis color of described standard green The Y-axis that the X-axis chromaticity coordinates value of coordinate figure, the Y-axis chromaticity coordinates value of described standard green, described standard blueness, described standard are blue Chromaticity coordinates value detects.

Obtain the value of described parameter 1, the value of described parameter 2 and the value of described parameter 3.

Method the most according to claim 3, it is characterised in that the value of the described parameter of described acquisition 1, the value of described parameter 2 Comprise the following steps with the step of the value of described parameter 3:

Preset red gain value according at least two and regulate described LED display；

At least two red luma value described at least two being preset red gain value corresponding respectively detects；

Preset red gain value according to described at least two and described at least two red luma value get parms 1 value；

Preset green gain value according at least two and regulate described LED display；

At least two Green brightness value described at least two being preset green gain value corresponding respectively detects；

Preset green gain value according to described at least two and described at least two Green brightness value get parms 2 value；

Preset blue gain value according at least two and regulate described LED display；

At least two blue intensity values respectively described at least two being preset blue gain value corresponding detects；

Preset blue gain value according to described at least two and described at least two blue intensity values get parms 3 value.

5. the device of a LED display white balance adjusting, it is characterised in that described device includes:

First adjustment module, for according to initial red gain value, initial green yield value and initial blue gain value regulation LED Display screen；

First detection module, for detecting feedback brightness value, feedback X-axis chromaticity coordinates value and feedback Y-axis chromaticity coordinates value；

Second acquisition module, sits for obtaining X-axis color according to described feedback X-axis chromaticity coordinates value and described target X-axis chromaticity coordinates value Scale value difference；

3rd acquisition module, sits for obtaining Y-axis color according to described feedback Y-axis chromaticity coordinates value and described target Y-axis chromaticity coordinates value Scale value difference；

4th acquisition module, for when described brightness value difference, described X-axis chromaticity coordinates value difference value and described Y-axis chromaticity coordinates value difference In value at least one interval beyond its ranges of error values, according to described feedback brightness value, described feedback X-axis chromaticity coordinates value and Described feedback Y-axis chromaticity coordinates value obtains target red gain value, target green yield value and target blue gain value；

Second adjustment module, according to described target red gain value, described target green yield value and described target blue gain Value regulates described LED display；

Described 4th acquisition module is according to described feedback brightness value, described feedback X-axis chromaticity coordinates value and described feedback Y-axis chromaticity coordinates Value obtain target red gain value, target green yield value and target blue gain value particularly as follows:

\{\begin{matrix} \frac{L_{w b}}{W_{y b}} - \frac{L_{w}}{W_{y}} = a_{1} \frac{1}{R_{y}} {ΔG}_{R} + a_{2} \frac{1}{G_{y}} {ΔG}_{G} + a_{3} \frac{1}{B_{y}} {ΔG}_{B} \\ \frac{L_{w b}}{W_{y b}} W_{x b} - \frac{L_{w}}{W_{y}} W_{x} = a_{1} \frac{R_{x}}{R_{y}} {ΔG}_{R} + a_{2} \frac{G_{x}}{G_{y}} {ΔG}_{G} + a_{3} \frac{B_{x}}{B_{y}} {ΔG}_{B} \\ L_{w b} - L_{w} = a_{1} {ΔG}_{R} + a_{2} {ΔG}_{G} + a_{3} {ΔG}_{B} \\ {ΔG}_{R} = G_{R + 1} - G_{R} \\ {ΔG}_{G} = G_{G + 1} - G_{G} \\ {ΔG}_{B} = G_{B + 1} - G_{B} \end{matrix},

Device the most according to claim 5, it is characterised in that also include:

Second detection module, for the X-axis chromaticity coordinates value of described canonical red, the Y-axis chromaticity coordinates value of described canonical red, institute State the blue X-axis chromaticity coordinates value of the X-axis chromaticity coordinates value of standard green, the Y-axis chromaticity coordinates value of described standard green, described standard, The Y-axis chromaticity coordinates value of described standard blueness detects.

Device the most according to claim 5, it is characterised in that also include:

5th acquisition module, for obtaining the value of described parameter 1, the value of described parameter 2 and the value of described parameter 3.

Device the most according to claim 7, it is characterised in that described 5th acquisition module includes:

First regulation unit, regulates described LED display for presetting red gain value according at least two；

First detector unit, for presetting at least two red luma value that red gain value is corresponding respectively to described at least two Detect；

First acquiring unit, is used for presetting red gain value according to described at least two and described at least two red luma value obtains Take the value of parameter 1；

Second regulation unit, regulates described LED display for presetting green gain value according at least two；

Second detector unit, for presetting at least two Green brightness value that green gain value is corresponding respectively to described at least two Detect；

Second acquisition unit, is used for presetting green gain value according to described at least two and described at least two Green brightness value obtains Take the value of parameter 2；

3rd regulation unit, regulates described LED display for presetting blue gain value according at least two；

3rd detector unit, for presetting at least two blue intensity values that blue gain value is corresponding respectively to described at least two Detect；

3rd acquiring unit, is used for presetting blue gain value according to described at least two and described at least two blue intensity values obtains Take the value of parameter 3.