Stencil-FSC Method for Color Breakup Suppression and Low Power Consumption in Field Sequential Color LCDs

• Main Authors: Ching Ming Wei, 魏景明
• Other Authors: Yi-Pai Huang
• Format: Others
• Language: en_US
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/55710022294349411894

碩士 === 國立交通大學 === 光電工程系所 === 96 === The color sequential technique is a kind of display mechanisms. The field images with different colors light in time sequence, by human eyes integration, a colorful image can be generated by temporal color mixing. The technique utilizing on LCDs called Field Sequential Color –LCD (FSC-LCD) can remove the color filters in displays, so it has several advantages, such as low power consumption, feasibility of high resolution, high color saturation, and low cost. Therefore, the FSC display has high potential to be a next generation display system. However, the FSC-LCDs have a serious issue, Color breakup (CBU), and it will degrade the image quality and make viewers uncomfortable. In resent years, several methods have been proposed to suppress CBU; nevertheless, the methods have some issues, like image distortion and limitation of LC response time…etc. Therefore, the FSC-LCD has not become a commercial display yet. In the thesis, a color sequence called Stencil Field Sequential Color (Stencil-FSC) method was proposed to suppress CBU. Stencil-FSC is composed by four fields in each frame. The concept of displaying single-color field images of conventional color sequence is modified, and a multi-color image is utilized in the Stencil-FSC method. The multi-color image is displayed in first multi-color field, and red, green, and blue fields were utilized to add color details. By the method, the color and luminance of red, green, and blue field are reduced, and it is helpful to suppress CBU. Simulation and demonstration on a 32” FSC-LCD have been implemented to verify the CBU suppression of the method. Moreover, the FSC-LCD achieved the contrast ratio of 5000:1, NTSC of 114%, and the average power consumption is only 44W (Conventional 32” CCFL-LCD is 105W, and 32” LED-LCD is 180W).