-
公开(公告)号:US4997263A
公开(公告)日:1991-03-05
申请号:US364750
申请日:1989-06-12
申请人: Richard L. Cohen , Rubin Gelles
发明人: Richard L. Cohen , Rubin Gelles
CPC分类号: G02B27/017 , G02B27/0172 , G02B2027/0138
摘要: A liquid crystal display system utilizes an optical arrangement which is aligned so that ambient light from the direction of an obersver's view is channeled behind the liquid crystal display to provide back illumination therefor. An illuminator is arranged to provide supplementary illumination for the liquid crystal display as may be required. A photodetector determines when ambient light is inadequate for required display brightness and operates through appropriate control circuitry to turn the illuminator on or off as the case may be and to control the contrast of the liquid crystal display.
摘要翻译: 液晶显示系统利用光学布置,其被对准,使得来自观察者方向的环境光被引导到液晶显示器后面,以提供背光照明。 照明器被布置成为可能需要的液晶显示器提供辅助照明。 光电探测器确定何时环境光不足以满足所需的显示亮度,并通过合适的控制电路操作,以根据情况打开或关闭照明器,并控制液晶显示器的对比度。
-
公开(公告)号:US06340114B1
公开(公告)日:2002-01-22
申请号:US09096578
申请日:1998-06-12
申请人: Mark Correa , Rubin Gelles , Duanfeng He , Eugene Joseph , Yajun Li , Mehul Patel , Thomas M. Stankelis
发明人: Mark Correa , Rubin Gelles , Duanfeng He , Eugene Joseph , Yajun Li , Mehul Patel , Thomas M. Stankelis
IPC分类号: G02B2608
CPC分类号: G06K7/10811 , G06K7/10722 , G06K2207/1011
摘要: An imaging engine and signal processing devices and methods are disclosed for reading various kinds of optical codes. The compact structure may include a two dimensional image sensor, apparatus for focusing images at different focal disclosures, an aiming system, a hi-low beam illumination system and related signal processing circuits.
摘要翻译: 公开了用于读取各种光学代码的成像引擎和信号处理装置和方法。 紧凑结构可以包括二维图像传感器,用于在不同焦点曝光下聚焦图像的设备,瞄准系统,高光束照明系统和相关信号处理电路。
-