brightness control device of the in-vehicle display device, brightness control program and the brightness control method

摘要

PROBLEM TO BE SOLVED: To provide comfortable driving environment by appropriate control of luminance.;SOLUTION: A luminance control system 10 includes a computer 12 and a CPU 12a of the computer 12 detects the line-of-sight direction of a driver from a shot image of a first camera 14. The luminance distribution in a driver's visible area is calculated from a shot image of a second camera 16. In addition, driver's gazing luminance is detected from the line-of-sight direction. When a driver is viewing an in-vehicle display unit 20, the luminance of the in-vehicle display unit 20 is controlled in view of the luminance in the line-of-sight direction moved to the outside of the vehicle after the viewing operation. When the line-of-sight direction is moved from the outside of the vehicle to the in-vehicle display unit 20, the luminance of the in-vehicle display unit 20 is taken to be equivalent to the gazing luminance of a position that has been viewed until that time. Accordingly, adaptation of eyes is quick. When the line of sight is directed to the outside of the vehicle, the luminance of the in-vehicle display unit 20 is reduced. Thus, there is little adverse effect of reflection or glare.;COPYRIGHT: (C)2012,JPO&INPIT