Method for deciding signal of driving organic electroluminescence module

A driving signal and luminescent technology, applied in electroluminescent light sources, electric light sources, electrical components, etc., can solve problems such as color distortion of luminescent displays

Active Publication Date: 2005-11-16
AU OPTRONICS CORP
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  • Summary
  • Abstract
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  • Claims
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Problems solved by technology

Under different operating voltages, the white light generated by white organic electroluminescent diodes will have different composition ratios, among which the ratio of red light, green light and blue light will change due to the operating voltage, resulting in a four-color organic electroluminescent display. There is still the disadvantage of color distortion to be overcome

Method used

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  • Method for deciding signal of driving organic electroluminescence module
  • Method for deciding signal of driving organic electroluminescence module
  • Method for deciding signal of driving organic electroluminescence module

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Experimental program
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Embodiment I

[0057] In an embodiment of the present invention, according to the concept that "white light is a collection of red light, green light and blue light", the individual signal values ​​(r', g' and b') according to the following three formulas, the preliminary signal value is given first, and input to the red light unit 34, the green light unit 36 ​​and the blue light unit 38:

[0058] r' = r-w

[0059] g' = g-w

[0060] b’ = b-w………..

[0061] Next, considering that the luminescent color spectrum of the white organic electroluminescent diode is different under different operating voltages, the signal value r', g' or b' is further fine-tuned. At the same time, cooperate with the chromatograph to detect the organic electroluminescent component 30 to confirm the color displayed by the organic electroluminescent component 30 after fine-tuning. When the organic electroluminescent component 30 is fine-tuned to confirm that it displays the predetermined color C1, then record the indi...

Embodiment II

[0064] In a preferred embodiment of the present invention, the following three formulas are utilized:

[0065] r' = a 1 (r-w)+b 1 w

[0066] g' = a 2 (g-w)+b 2 w

[0067] b' = a 3 (b-w)+b 3 w…………….

[0068] At the same time, a chromatograph is used to detect the chromatogram displayed by the organic electroluminescence component 30 , and cooperate with white balance adjustment and gamma adjustment to determine the signal values ​​of the red signal, the green signal and the blue signal.

[0069] Substituting into the result of , we can get:

[0070] C=a 1 (r-w)R+a 2 (g-w)G+a 3 (b-w)B+b 1 wR+b 2 wG+b 3 wB+wW

[0071] ……………..

[0072] Among them, a 1 、a 2 、a 3 , b 1 , b 2 with b 3 is the coefficient. Coefficient b 1 , b 2 with b 3 is used for white balance adjustment, and the coefficient a 1 、a 2 with a 3 It is used to adjust the individual gamma curves of red, green and blue. According to the method provided by the prese...

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Abstract

A decision method of driving signal for organic electrofluorescence component ( OEC ) includes using minimum signal value of three reference signal values of red, green and blue in reference driving signal corresponded by three - element OEC as white signal value of four - element OEC; using D - value of red reference signal value ( FSV ) to white signal value ( WSV ) as red signal value ( SV ), D - value of green FSV to WSV as green SV and D - value of blue FSV to WSV as blue SV; adjusting signal value of three colours to compensate colour cast of four - element OEC in display.

Description

technical field [0001] The invention relates to a method for determining a driving signal related to an organic electroluminescent device (Organic Electroluminescent Device, OLED); in particular, it relates to a driving signal algorithm related to an organic electroluminescent display with a white organic light emitting diode (White OLED). Background technique [0002] Organic electroluminescent displays (OLEDs Display) have the advantages of high brightness, high response speed, thin and small size, full color and no need for backlight. Therefore, they have threatened other types of flat-panel displays (such as liquid crystal displays) in the market. Currently, organic electroluminescent displays have been applied to portable information products such as mobile phones, personal digital assistants, digital cameras and video cameras. [0003] The technologies related to organic electroluminescent displays are developing very vigorously due to the strong demand for display pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/3208H05B44/00
Inventor 李重君施立伟
Owner AU OPTRONICS CORP
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