公开(公告)号：US20120182532A1

公开(公告)日：2012-07-19

申请号：US13167083

申请日：2011-06-23

Applicant: Sen-Yung Liu ,  Chien-chih Hsiung ,  Chen-Ren Yu ,  Kuo-Liang Wen ,  Yi-Chung Hung ,  Chiao-Sen Hsu ,  Chao-Yang Ke ,  Keng-Hui Lin ,  Fu-Shan Wu

Inventor： Sen-Yung Liu ,  Chien-chih Hsiung ,  Chen-Ren Yu ,  Kuo-Liang Wen ,  Yi-Chung Hung ,  Chiao-Sen Hsu ,  Chao-Yang Ke ,  Keng-Hui Lin ,  Fu-Shan Wu

IPC: G03B3/10

CPC classification number: G03B21/53

Abstract: An automatic focus system of a projector includes a projecting module, an image catching module, a memory, a micro processor, and a focusing module. The projecting module has an image light source to provide image light, and a projecting lens to project the image light on a screen. The image catching module senses an image on the screen. The microprocessor calculates the sensed image to have a definition value of the image and save the definition value in the memory. The focusing module may move the projecting lens is moved along an optical axis under a control of microprocessor. The microprocessor compares the definition values to control the focusing module to move the cam to a position where the projector may project a clear image on the screen.

Abstract translation: 投影仪的自动对焦系统包括投影模块，图像捕获模块，存储器，微处理器和聚焦模块。 投影模块具有提供图像光的图像光源，以及将图像光投影到屏幕上的投影透镜。 图像捕捉模块检测屏幕上的图像。 微处理器计算感测图像以具有图像的定义值，并将定义值保存在存储器中。 在微处理器的控制下，聚焦模块可以移动投影透镜沿着光轴移动。 微处理器比较定义值以控制聚焦模块将凸轮移动到投影仪可以在屏幕上投射清晰图像的位置。