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    • 2. 发明授权
    • Coordinates detection apparatus
    • 坐标检测装置
    • US06504532B1
    • 2003-01-07
    • US09577496
    • 2000-05-25
    • Tsutomu OgasaharaTakahiro ItoKenichi Takekawa
    • Tsutomu OgasaharaTakahiro ItoKenichi Takekawa
    • G09G500
    • G06F3/0421
    • A coordinates detection apparatus comprises two optical units each having a light emitter, a diffusion lens, a read lens, and a light-receiver. The optical units are provided at different positions on the border of a display surface. The light-emitter and light-receiver in each optical unit are so located that their optic axes are coincident. A recursive reflection section reflects the light emitted from the light-emitter and diffused by the diffusion lens in a fan form towards the light-emitter. The coordinates of a point specified on the display surface are detected by focusing the light reflected on the reflection section with the read lens, receiving the reflected light with the light-receiver, and determining the position where reception of the light is hindered.
    • 坐标检测装置包括两个光学单元,每个具有光发射器,漫射透镜,读取透镜和光接收器。 光学单元设置在显示面的边界上的不同位置。 每个光学单元中的发光器和光接收器位于它们的光轴重合的位置。 递归反射部分反射从发光器发出的并以散射透镜散射的光朝向发光体。 通过将在反射部分上反射的光与读取透镜聚焦,用光接收器接收反射光并确定光的接收位置来检测在显示表面上指定的点的坐标。