公开(公告)号：US20040119908A1

公开(公告)日：2004-06-24

申请号：US10700667

申请日：2003-11-05

Applicant: ADVANCED DISPLAY INC.

Inventor： Seiji Sakai

IPC: G02F001/1335

CPC classification number: G02F1/133603 ,  G02B6/0028 ,  G02B6/0031 ,  H01H2219/056

Abstract: A liquid crystal display apparatus has R, G, and B LEDs and a light guide plate for guiding and diffusing the light entering through an incident surface evenly over the plate. The bottom surface of the light guide plate has a diffusion portion where microdot pattern is printed to diffuse incident light. The liquid crystal display apparatus also has an optical sensor for receiving the light exiting from the light guide plate through a side surface, and a light-shielding member mounted in front of the optical sensor. The light-shielding member has pinholes to block the light incident on the optical sensor in the direction from the incident surface to the opposite surface at an incidence angle greater than a given angle. The luminance of the LEDs is controlled based on the light detected by the optical sensor.

Abstract translation: 液晶显示装置具有R，G，B LED以及导光板，用于将通过入射面进入的光均匀地引导并扩散到板上。 导光板的底面具有扩散部分，其中印刷微点图案以扩散入射光。 液晶显示装置还具有用于从侧面接收从导光板射出的光的光学传感器，以及安装在光学传感器前方的遮光部件。 光屏蔽构件具有针孔，以大于给定角度的入射角沿着从入射面到相对面的方向阻挡入射在光学传感器上的光。 基于由光学传感器检测到的光来控制LED的亮度。