KR970057628A

KR970057628A - Eye Protection Circuit of the Projector

Info

Publication number: KR970057628A
Application number: KR1019950054980A
Authority: KR
Inventors: 정의선
Original assignee: 구자홍; Lg 전자주식회사
Priority date: 1995-12-22
Filing date: 1995-12-22
Publication date: 1997-07-31

Abstract

본 발명은 외부로부터 영상신호를 공급받아 이를 확대처리하여 대형화면에 디스플레이하는 프로젝터(Projector)에서 스크린측으로 투사되는 아주 강한 광에 의하여 유아들이나 주변에 잇는 사람들이 시력이 손상되는 것을 방지하는 기술에 관한 것으로, 초음파센서(4)와 마이크로컴퓨터(8)를 이용하여 광통(1)과 스크린(5)사이의 위험거리내에 사람이 위치하는지를 검출하고, 그 결과 위험거리내에 위치하는 것으로 판단되면 그 마이크로컴퓨터(8)의 제어하에 모터구동부(9)를 구동시켜 상기 경통(1)의 전면부에 설치한 개폐장치(3)를 닫도록 하였다.The present invention relates to a technology for preventing infants or those around them from being damaged by very strong light projected to the screen side from a projector that receives an image signal from the outside and magnifies it and displays it on a large screen. By using the ultrasonic sensor 4 and the microcomputer 8, it is detected whether a person is located within the dangerous distance between the light tube 1 and the screen 5, and if it is determined that the person is located within the dangerous distance, the microcomputer Under the control of (8), the motor driving part 9 was driven to close the opening and closing device 3 provided in the front part of the barrel 1.

Description

Eye Protection Circuit of the Projector

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

첨부한 도면은 본 발명 프로젝터의 시력보호회로에 대한 일실시 예시 블록도The accompanying drawings are an exemplary block diagram of an eye protection circuit of the projector according to the present invention.

Claims

It is installed in the light tube 1, the opening and closing device (3) for controlling the light projected to the screen (5) side by receiving power from the motor (M), and is installed on one side of the light tube 1, the light tube (1) Detecting whether an object is present in front of the sensor, and determining whether the object is located within a predetermined distance from the front surface of the light tube 1 by using a signal supplied from the sensor 4 to output the drive control signal of the motor M. And a microcomputer (8) and a motor driver (9) for driving the motor (M) by a drive control signal output from the microcomputer (8).

The eye protection circuit according to claim 1, further comprising a drive control switch for the motor (M) further configured to be external to the projector.

The eye protection circuit according to claim 2, wherein the drive control switch is turned on only during pressing.

※ Note: It is to be disclosed based on the initial application.