Device that automatically adjusts the brightness of the OSD screen according to the change of the ambient light

摘要

The present invention relates to a television that automatically adjusts the brightness of a television OSD screen, and more particularly, to an apparatus for automatically adjusting the brightness of a television OSD screen using an EEPROM according to a change in ambient light. On the PIP television, the main screen and sub screen displayed on the receiving hall while the viewer is watching a broadcast program can be controlled by using the remote controller's control button or the control terminal mounted on the television to adjust brightness, contrast, color intensity, and sharpness to the ambient light. Although it can be adjusted and viewed properly, the OSD screen has a visual problem in watching because the brightness, contrast, color density, sharpness, etc. are fixed at a constant and cannot be adjusted according to the change in ambient illumination. The present invention focuses on the above-mentioned problem, and puts an illumination sensor mounted on the system of the television to automatically detect the change of the ambient illumination, and sets value data of the signals constituting the brightness of the OSD screen suitable for the corresponding illumination stored in the EEPROM. By combining the OSD blanking signal and the RGB signal applied from the OSD amplification unit with the change of the ambient light, the OSD screen is automatically adjusted.