公开(公告)号：US20150253934A1

公开(公告)日：2015-09-10

申请号：US14615670

申请日：2015-02-06

Applicant: PIXART IMAGING INC.

Inventor： YU-CHIA LIN ,  CHUAN-CHING LIN ,  YU-HSIN LIN ,  HAN-PING CHENG ,  TZUNG-MIN SU ,  CHIH-HSIN LIN ,  HSIN-CHI CHENG ,  CHUN-SHENG LIN ,  YU-HSIANG HUANG ,  KUAN-HSU CHEN ,  CHUN-YI LU

IPC: G06F3/042

CPC classification number: G06F3/0428 ,  G06F3/0418

Abstract: The present disclosure provides an object detection method including: pre-storing a lookup table of touch reference values, wherein the lookup table of touch reference values records a plurality of touch reference values associated with image positions of a plurality of calibration object images formed in calibration images captured by a first image sensor; capturing a first image, wherein the first image has at least an object image corresponding to a pointer formed therein; generating a first light distribution curve according to the first image; defining a first detection region in the first light distribution curve; obtaining at least one touch reference value associated with the object image using the lookup table of touch reference values; comparing at least one brightness value within the first detection region of the first light distribution curve with the at least one touch reference value obtained.

Abstract translation: 本公开提供一种对象检测方法，包括：预存储触摸参考值的查找表，其中所述触摸参考值的查找表记录与校准中形成的多个校准对象图像的图像位置相关联的多个触摸参考值 由第一图像传感器拍摄的图像; 拍摄第一图像，其中所述第一图像至少具有与其中形成的指针相对应的对象图像; 根据第一图像生成第一光分布曲线; 在第一光分布曲线中限定第一检测区域; 使用所述触摸参考值的查找表获得与所述对象图像相关联的至少一个触摸参考值; 将第一光分布曲线的第一检测区域内的至少一个亮度值与所获得的至少一个触摸参考值进行比较。

公开(公告)号：US20150009494A1

公开(公告)日：2015-01-08

申请号：US14492018

申请日：2014-09-20

Applicant: PixArt Imaging Inc.

Inventor： HUNG-CHING LAI ,  CHUN-SHENG LIN

IPC: G01J1/02 ,  G06F3/042 ,  G01J1/04

CPC classification number: G01J1/0295 ,  G01J1/0271 ,  G01J1/0407 ,  G06F3/0421 ,  G06F3/0428

Abstract: An optical touch device with a detecting area includes light guide components, a light source module, a light detecting component and an auxiliary light guide component. Each light guide component includes a first light emitting surface. The light guide components includes a first light guide component and a second light guide component. The auxiliary light guide component and the light detecting component are disposed between two neighboring ends of the first light guide component and the second light guide component, and the light detecting component includes a light detecting end. The auxiliary light guide component is positioned between the light detecting component and the detecting area and includes a first light incidence surface, a second light incidence surface and a second light emitting surface connected between the first light incidence surface and the second light incidence surface. The optical touch device can effectively avoid the blind zone problem.

Abstract translation: 具有检测区域的光学触摸装置包括导光部件，光源模块，光检测部件和辅助光导部件。 每个导光部件包括第一发光面。 光导部件包括第一光导部件和第二光导部件。 辅助光导部件和光检测部件设置在第一导光部件和第二导光部件的两个相邻端之间，光检测部件包括光检测端。 辅助光导部件位于光检测部件和检测区域之间，并且包括连接在第一光入射表面和第二光入射表面之间的第一光入射表面，第二光入射表面和第二发光表面。 光学触摸装置可以有效地避免盲区问题。