US 9,812,089 B2
Method of raising contrast of OLED display panel and system
Yichien Wen, Shenzhen (CN); Shensian Syu, Shenzhen (CN); and Mingjong Jou, Shenzhen (CN)
Assigned to SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD., Shenzhen, Guangdong (CN)
Appl. No. 14/892,203
Filed by Shenzhen China Star Optoelectronics Technology Co., Ltd., Shenzhen (CN)
PCT Filed Oct. 26, 2015, PCT No. PCT/CN2015/092793
§ 371(c)(1), (2) Date Nov. 19, 2015,
PCT Pub. No. WO2017/063223, PCT Pub. Date Apr. 20, 2017.
Prior Publication US 2017/0193964 A1, Jul. 6, 2017
Int. Cl. G09G 5/10 (2006.01); G09G 3/20 (2006.01)
CPC G09G 5/10 (2013.01) [G09G 3/2003 (2013.01); G09G 2320/066 (2013.01); G09G 2380/02 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method of raising contrast of an OLED display panel, comprising steps of:
step 1, providing an original RGB signal and an original low driving voltage of an image to be inputted to the OLED display panel;
step 2, converting the original RGB signal into a HSI color space constructed by a hue component, a saturation component and an intensity component;
step 3, implementing histogram statistics to the intensity component to obtain a histogram of the intensity component;
step 4, calculating according to the histogram of the intensity component to obtain a conversion parameter;
step 5, keeping the hue component and the saturation component unchanged, and implementing enhancement treatment to the intensity component with a contrast enhancing method to obtain a new intensity component;
step 6, calculating the conversion parameter and the original low driving voltage to obtain a new low driving voltage, and a formula is: OVSS′=K×X×OVSS, wherein OVSS' is the new low driving voltage, K is a constant coefficient, and X is the conversion parameter, and OVSS is the original low driving voltage;
step 7, converting the hue component, the saturation component and the new intensity component into a RGB color space to obtain a new R′G′B′ signal, and inputting the new R′G′B′ signal and the new low driving voltage to a pixel driving circuit in the OLED display panel, and the OLED display panel shows a new image with an enhanced contrast.