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Optical position detecting device and display system provided with input function

A detection device and display system technology, applied in the input/output process of data processing, instruments, electrical digital data processing, etc., can solve the problems of unavoidable detection light attenuation, narrow angle range, narrow range, etc.

Inactive Publication Date: 2012-09-19
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, since the angular range of the emission direction of the detection light itself is narrow, the range in which the position of the target object can be detected is narrow.
In addition, in the optical position detection devices described in Patent Documents 2 and 3, since the detection light emitted from the point light source is emitted through the light guide plate, the detection light can be emitted over a relatively wide range, but the detection light cannot be avoided. Attenuation when light propagates inside the panel
Therefore, it is difficult to form a predetermined light intensity distribution with a sufficient intensity level over a wide range, so the range where the position of the target object can be detected is narrow.

Method used

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  • Optical position detecting device and display system provided with input function
  • Optical position detecting device and display system provided with input function
  • Optical position detecting device and display system provided with input function

Examples

Experimental program
Comparison scheme
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Embodiment approach 1

[0036] (the whole frame)

[0037] figure 1 is an explanatory diagram schematically showing main parts of the optical position detection device according to Embodiment 1 of the present invention, figure 1 (a) is an explanatory diagram when the optical position detection device is viewed from an oblique direction on the emission space side of the detection light, figure 1 (b) is an explanatory diagram when the optical position detection device is viewed from the front.

[0038] exist figure 1 Among them, the position detection system 1 of the present embodiment has: an observation surface constituent member 40 having an observation surface 41 provided with observation information; At the position of the target object Ob on one side Z1) in the Z-axis direction, the observation surface 41 extends along the XY plane. The position detection system 1 can be used as a display system with an input function for detecting the position (XY coordinates) of the target object Ob in the d...

Embodiment approach 2

[0108] Figure 11 It is an explanatory diagram schematically showing main parts of the optical position detection device 10 according to Embodiment 2 of the present invention. Figure 12 It is an explanatory diagram of the light source unit of the optical position detection device 10 according to Embodiment 2 of the present invention. In addition, since the basic structure of this embodiment is the same as that of Embodiment 1, the same code|symbol is attached|subjected and shown to a common part, and description is abbreviate|omitted.

[0109] In Embodiment 1, the light guide LG was used for the light source unit, but in this embodiment, the XY coordinates of the target object Ob can be detected by the same principle as in Embodiment 1 without using a light guide.

[0110] More specifically, as Figure 11 As shown, the first light source part 12A of the first light receiving and emitting unit 15A includes: a plurality of light sources 120 (a plurality of first light sources...

Embodiment approach

[0122] In the above-mentioned embodiment, the detection light emission angle range θa of the first light receiving and emitting unit 15A and the detection light emitting angle range θd of the fourth light receiving and emitting unit 15D are set to 120°, and the detection light of the second light receiving and emitting unit 15B is emitted. The angle range θb and the detection light emission angle range θc of the third light receiving and emitting unit 15C are set to 90°. Wherein, according to the distance between the first light receiving and emitting unit 15A and the fourth light receiving and emitting unit 15D and the detection target space 10R, the detection light emitting angle ranges θa and θd may be set to be smaller than 120°. In addition, depending on the distance between the second light receiving and emitting unit 15B and the third light receiving and emitting unit 15C and the detection target space 10R, the detection light emission angle ranges θb and θc may be set t...

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Abstract

The invention provides an optical position detecting device and a display system provided with input function. A detection target space of an optical position detecting device is divided into a detection target space configured by a first light receiving and emitting unit and a second light receiving and emitting unit and a detection target space configured by a third light receiving and emitting unit and a fourth light receiving and emitting unit. The first light receiving and emitting unit and the fourth light receiving and emitting unit are separated in the X axis direction, and the second light receiving and emitting unit and the third light receiving and emitting unit are arranged on one side in the Y axis direction. The first light receiving and emitting unit and the fourth light receiving and emitting unit are arranged on the outer side of the second light receiving and emitting unit and the third light receiving and emitting unit in the X axis direction.

Description

technical field [0001] The present invention relates to an optical position detection device for optically detecting the position of a target object, and a display system with an input function including the optical position detection device. Background technique [0002] As an optical position detection device that optically detects a target object, for example, it is proposed that each light source of a plurality of point light sources emits detection light toward the target object through a light-transmitting member, and the detection light reflected by the target object passes through the light-transmitting member. An optical position detection device for detection by a light receiving unit (refer to Patent Document 1). In addition, an optical position detection device has been proposed in which detection light emitted from a plurality of point light sources is emitted through a light guide plate, and detection light reflected by a target object is detected by a light re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/042
CPCG06F2203/04101G06F3/0304G06F3/0428G06F3/0416G06F3/04166
Inventor 清濑摄内
Owner SEIKO EPSON CORP
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