发明名称 IN-FINDER DISPLAY DEVICE FOR CAMERA
摘要 PURPOSE:To make an easy-to-see in-finder display at all times by controlling the brightness level of a light emitting element according to brightness information on the peripheral area of a subject field. CONSTITUTION:The outputs of photodiodes 29c-29f are A/D-converted corresponding to the peripheral area of the subject field and the mean value is found. A microcomputer #2 outputs brightness modulation signals OP2a-OP2c to a waveform output circuit OSC according to the level. Consequently, the circuit OSC outputs a waveform with a duty ratio corresponding to the mean value of the brightness information to turn on LEDs 14a-14d for exposure information lighting and an LED 14c for focusing decision making. Therefore, whatever composition a subject is put in, the in-finder display can be made easy to see at all times.
申请公布号 JPS63174032(A) 申请公布日期 1988.07.18
申请号 JP19870006344 申请日期 1987.01.14
申请人 CANON INC 发明人 YAMADA AKIRA;AIHARA YOSHIHIKO
分类号 G03B17/20 主分类号 G03B17/20
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