Patent ID: 9236013
Filing Date: 2016-01-12
CPC Classification: G09G

Claim Text:
1. A deterioration-detecting circuit of a display device including a display panel, a light source that illuminates the display panel, and a control unit that controls a luminescence amount of the light source, comprising: a luminescence amount-detecting unit configured to detect a luminescence amount of the light source or the display panel; a drive value-detecting unit configured to detect a drive value that is used to control the luminescence amount of the light source by the control unit; a temperature-detecting unit configured to detect an internal temperature or external temperature of the display device; a reference luminescence amount-acquiring unit configured to obtain a reference luminescence amount corresponding to the temperature detected by the temperature-detecting unit and the drive value detected by the drive value-detecting unit based on a relationship between the reference luminescence amount and the temperature of the light source and the drive value which are obtained previously; and a deterioration-detecting unit configured to obtain an initial status value based on a ratio of the reference luminescence amount obtained based on the temperature and the drive value in an initial status by the reference luminescence amount-acquiring unit and the luminescence amount in the initial status detected by the luminescence amount-detecting unit, obtain a current status value based on a ratio of the reference luminescence amount obtained based on a current temperature and a current drive value by the reference luminescence amount-acquiring unit and a current luminescence amount detected by the luminescence amount-detecting unit, compare the initial status value with the current status value, and give an instruction to display deterioration of the display device or the light source when calibration is determined to be required.