Display device comprising a light source

• Main Author: STESSEN JEROEN H. C. J.,DEMCHENKO MAKSYM
• Format: Patent
• Language: English
• Published: 09.05.2007
• Subjects: ADVERTISING; ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION; CRYPTOGRAPHY; DISPLAY; EDUCATION; PHYSICS; SEALS

A display device (DD) comprises a light source (LS); a display panel (DP) with display pixels for modulating light originating from the light source (LS); and processing circuitry (P) coupled to the display panel (DP) and the light source (LS). The processing circuitry (P) has an input for receiving an input signal (V 1 ) representing gray levels of pixels of an image to be displayed on the display panel (DP) and comprises: an amplifier (A) for amplifying the input signal (V 1 ) to provide an output signal (V 2 ) for driving the display pixels, a detector (S) for detecting whether within a part of the image a property of the output signal (V 2 ), and-control circuitry (CM) for controlling a gain of the amplifier (A) and a brightness level of the light source (LS) in dependence on the property. The property may be that a first number of pixels of the output signal (V 2 ) exceed a first predetermined number, wherein the first number of pixels is the number of pixels having a gray level exceeding a first predetermined gray level.