Patent ID: 6211852
Filing Date: 2001-04-03
Classification: B60Q,G09G

Abstract:
A liquid crystal display device, comprising:a liquid crystal display element for indicating information for a viewer;a temperature sensor for detecting a temperature of the liquid crystal display element to produce a detected signal;a light source for illuminating said liquid crystal display element;a dimmer circuit for said light source for adjusting brightness of indication of said liquid crystal display element; anda controller for supplying a driving signal to said liquid crystal display element in accordance with an external input signal and for supplying to said dimmer circuit, a control signal for controlling said light source, in accordance with said external input signal and said detected signal;wherein when said detected signal produced from said temperature sensor is not higher than an indication disabling temperature of said liquid crystal display element, said controller supplies a high luminance signal to said dimmer circuit to enhance an application voltage to said light source, and on-off controls said driving signal within a time shorter than the response time of said liquid crystal display element.