Display Device

Abstract

[Problem] A non-self-luminous display device is enabled infallibly to alarm a trouble in a display that is inclusive of a power source system. [Means for Solving the Problem] The display device is provided with a non-self-luminous display 1, an image processor 2 for driving the display based on an image signal and a control signal entered from the outside, a power source circuit 3 for supplying an electric power to the image processor 2, a light source 6 for irradiating the display 1 with light, a light source driver 7 for supplying an electric power to the light source 6 and controlling the brightness of the light source 6, and a monitoring circuit 8 for monitoring the observed value consisting of at least either the value of electric current or the value of voltage of a power source line intervening between the power source circuit 3 and the image processor 2, and is characterized by the monitoring circuit 8 outputting to the light source driver 7 a trouble detection signal indicating occurrence of a trouble when the observed value deviates from a given range and the light source driver 7 admitting the trouble detection signal and varying the light-emitting condition such as the brightness of the light source 6.

Dependencies are inferred from the claim text.