Integrated amorphous silicon color sensor on TFT LCD

Author

Lee, Ki-Chan ; Park, YunJae ; Ko, Hyunseok ; Moon, Seung-Hwan ; Park, Jin-Heyok ; Berkeley, Brian ; Kim, Sang-Soo

Author_Institution

LCD Dev. Center, Samsung Electron., South Korea

Volume

1

fYear

2005

Firstpage

1035

Abstract

In this paper, we present the feasibility of an optical color sensing feedback system for an LED (light emitting diode) backlight by integrating the amorphous silicon color sensor onto the LCD panel. To improve the photoconductivity degradation of amorphous silicon, a new LASER immersion treatment has been applied. The integrated color sensor optical feedback controlled LED backlighting system improved the color variation to less than 0.008 Δu´v´ (CIE1976) compared with 0.025 for an open loop system over the temperature range of 42°C to 76°C.

Keywords

amorphous semiconductors; image sensors; light emitting diodes; optical feedback; photoconductivity; silicon; 42 to 76 degC; LASER immersion treatment; LCD panel; LED; TFT LCD; color variation; integrated amorphous silicon color sensor; light emitting diode backlight; optical color sensing feedback system; photoconductivity degradation; Amorphous silicon; Integrated optics; Laser feedback; Light emitting diodes; Open loop systems; Optical feedback; Optical sensors; Sensor systems; Temperature sensors; Thin film transistors;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State Sensors, Actuators and Microsystems, 2005. Digest of Technical Papers. TRANSDUCERS '05. The 13th International Conference on

Print_ISBN

0-7803-8994-8

Type

conf

DOI

10.1109/SENSOR.2005.1496632

Filename

1496632