Video display device and method for adjusting the same
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsIori Hayashi, Teruto Tanaka
Life of this patent
Estimating the term…
Abstract
A video display device includes a light source, a rotating substrate, a light detection unit, a light valve, and a control section. The light detection unit detects intensity of first color light emitted from the wheel in a second period included in a first period and in a third period which is included in the first period and does not overlap with the second period, where the first period is a period equal to time during which light continuously enters a first region. The control section controls at least one of the wheel and the light valve based on the intensity of the first color light detected in the light detection unit.
Claims16
A video display device comprising:
- a light source;
- a rotating substrate including a wheel having a first region which allows receiving light from the light source and emitting the light as first color light;
- a light detection unit for detecting intensity of the first color light emitted from the wheel in a second period included in a first period and in a third period which is included in the first period and does not overlap with the second period, where the first period is a period equal to time during which the light continuously enters the first region;
- a light valve for modulating the first color light emitted from the wheel and emitting light for video;
- and
- a control section connected to the rotating substrate, the light detection unit, and the light valve, and controlling at least one of the wheel and the light valve based on the intensity of the first color light detected in the light detection unit.
A method for adjusting a video display device, the method comprising:
- applying light from a light source;
- allowing the light to enter a wheel having a first region in a rotating substrate, and then emitting the light as first color light;
- applying the color light emitted from the wheel to a light valve;
- detecting intensity of the first color light emitted from the wheel in a second period included in a first period and in a third period which is included in the first period and does not overlap with the second period, where the first period is a period equal to time during which the light continuously enters the first region;
- and
- controlling at least one of the wheel and the light valve on a basis of the intensity of the detected first color light.
Dependencies are inferred from the claim text.