Patent ID: 6806871
Filing Date: 2004-10-19
Classification: G02F,G09G

Abstract:
A driver IC for driving an electro-optical element comprising:a power circuit for outputting a voltage in accordance with temperature-voltage characteristics; an electrical volume for varying an output voltage from the power circuit; a temperature detector for detecting an environmental temperature based on the temperature-voltage characteristics of the power circuit; and a correction memory for storing an electrical volume control value corresponding to the temperature detected by the temperature detector, wherein the power circuit comprises: a first power circuit having a first temperature-voltage characteristic; a second power circuit having a second temperature-voltage characteristic; and a temperature gradient selection circuit for outputting a voltage conforming with a desired temperature gradient characteristic based on output voltages from the first and second power circuits, wherein the temperature detector is installed in the driver IC to detect temperature based on the first and second temperature-voltage characteristics without directly measuring the environmental temperature, and adjusts the output voltages from the first and second power circuits at the electrical volume according to the electrical volume control value in the correction memory and outputs adjusted output voltages, the electrical volume control value corresponding to the temperature detected by the temperature detector.