KR970016738A - Projection Screen Control Device and Method of Projector - Google Patents

Abstract

The present invention relates to an apparatus and method for controlling an image projection level of an imager, and in the related art, it is not possible to control the brightness around the projection screen. A brightness detection sensor installed in the projection screen to detect brightness around the projection screen, a control part of the projection film which processes the signal detected by the brightness detection sensor and sends it to the projector, and controls the brightness detection value according to the control of the control part of the projection film. Of the projector for controlling the image output level transmitted in accordance with the signal received by the signal transmitter of the projection screen, the signal receiver of the projector receiving the signal transmitted from the signal transmitter of the projector screen, and the signal receiver of the projector A control unit for detecting the brightness around the projection screen and sending the light to the projector; The brightness of the projection screen is controlled by varying the output level of the image signal projected on the projection screen according to the signal, and when the analysis result of the transmission signal is not suitable for projecting the image, the projection of the projection screen controls the movement of the projection screen so that the image can be projected in an optimal state. It is possible to reduce energy by preventing the operation in the unsuitable state, and also to automatically perform the projection screen movement at the time of power on / off or when the ambient light is not appropriate.

Description

Apparatus and method for controlling the projection screen state of the projector

Since this is an open matter, no full text was included.

3 is a block diagram of an image film state control apparatus of a projector according to the present invention;

4 is a diagram showing a relationship between light quantity and light quantity detection data according to the present invention.

Claims (3)

A brightness detection sensor installed in the projection screen for detecting the brightness around the projection screen, processing the signal detected by the brightness detection sensor to send it to the projector, and controlling the projection screen controlling the movement of the projection screen, and the control panel of the projection screen. According to the signal received by the signal projector of the projection film for transmitting the brightness detection value to the projector under the control of the projector, the signal receiver of the projector for receiving the signal transmitted from the signal transmitter of the projector film, and the signal received by the signal receiver of the projector And a control unit of a projector for controlling an image output level to be sent and for giving a command to control the movement of the projection screen. The apparatus of claim 1, wherein the brightness detection sensor is a Cds cell. Detects the brightness around the projection screen and sends it to the projector, and changes the output level of the image signal projected on the projection screen according to the transmitted signal to control the brightness of the projection screen. In the case of the image film state control method of the imager, characterized in that for controlling the movement of the projection screen. ※ Note: The disclosure is based on the initial application.