US 2006/0050245 A1 · Projection type video display device

Abstract

An optimal processing portion (21) inputs a video signal (RGB signals) and analyzes 1-frame video in the video signal. For example, if the intensity of red color is 0 percent in all dots in 1-frame video, the optimal processing portion (21) applies to a light source gain adjustment portion (22) a control signal for rendering a gain of the illuminating device (1R) 0 percent (minimum amount of light). The light source gain adjustment portion (22) receives the control signal and controls power supply to the illuminating device (1R). In addition, the optimal processing portion (21) applies a driving instruction for rendering the amount of light transmission 0 percent with regard to all dots of the liquid crystal display panel (3R), for example, to a LCD signal processing portion (23).

Claims8

Dependent claims

A projection type video display, comprising:

a first solid light source that emits a light in red;
a second solid light source that emits a light in green;
a third solid light source that emits a light in blue;
a display panel for receiving and modulating said lights in colors from said light sources;
a means for projecting a full color image light formed of said modulated lights in colors;
a light source adjustment means for adjusting an amount of emitted light of said solid light sources by controlling power supplied thereto on the basis of video signal information;
and
a means for controlling a driving signal to each display panel so as to correspond to an adjustment of the amount of the emitted lights in respective colors.

5 more elements

Dependencies are inferred from the claim text.

Projection type video display device

Life of this patent

Projection type video display device

Life of this patent

Abstract

Claims8