Optical sensing key, touch screen, fingerprint collecting device and electronic device

A technology of electronic equipment and touch screen, applied in the fields of optical sensor keys, touch screen, fingerprint collection equipment, and electronic equipment, can solve the problem that it is difficult to meet the ultra-thin development trend of optical fingerprint collection equipment, the high cost of optical fingerprint collection equipment, the existence of sensitivity and False response and other problems, to achieve the effect of not easy false response, easy maintenance and cleaning, and reducing the number of parts

Active Publication Date: 2014-09-10
渭南印象认知技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The various touch buttons mentioned above have their own disadvantages. For example, resistive and capacitive types have sensitivity and false response problems because they measure weak signals. Infrared type is too thick.
The touch screen technology extended by the touch key also has the same defect
[0004] In addition, the optical fingerprint collection equipment in the prior art uses a prism as an optical device for carrying fingerprints, and a complex image collection device is installed behind the prism to collect the final fingerprint collection equipment. On the one hand, the cost of the prism is relatively high, resulting in a The overall cost of the collection equipment is correspondingly high. On the other hand, the prism has a large volume and a thick thickness, which makes it difficult to meet the needs of the ultra-thin development trend of existing optical fingerprint collection equipment.

Method used

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  • Optical sensing key, touch screen, fingerprint collecting device and electronic device
  • Optical sensing key, touch screen, fingerprint collecting device and electronic device
  • Optical sensing key, touch screen, fingerprint collecting device and electronic device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Such as Figures 1 to 2 As shown, the optical sensor key of this embodiment includes a light guide plate 1, the entire surface of the light guide plate is divided into a propagation area, and a light emitter 2 and a light receiver 3 are respectively arranged under the light guide plate. There is a certain distance between the emitter and the light receiver, and the propagation area, the light emitter and the light receiver form an inductive key. The total reflection transmission is set in the transmission area, the light emitted by the transmitter is transmitted by total reflection in the transmission area, and the light receiver is closely attached to the light guide plate.

[0054] The working principle of the optical sensor key described in this embodiment: the light transmitter turns on the output light, and the light is transmitted through total reflection in the propagation area until it reaches the bonding position of the light receiver and the light guide plate,...

Embodiment 2

[0058] Such as image 3 As shown, the optical sensor key of this embodiment includes a light guide plate 1, the entire surface of the light guide plate is a propagation area, and a light emitter 2 is arranged on one side of the end face of the light guide plate, and a light guide plate is set on the light guide plate at the same time. A light receiver 3 is arranged on the other side corresponding to one side of the end face of the transmitter, and the propagation area, the light transmitter and the light receiver form an induction key. In this embodiment, the incident angle of the light emitted by the light emitter is based on the fact that it can be fully emitted in the light guide plate, the light emitted by the emitter is transmitted through total reflection in the propagation area, and the light receiver is closely attached to the guide plate. Light board set.

[0059] The difference between this embodiment and Embodiment 1 lies in that the installation positions of the l...

Embodiment 3

[0063] Such as Figures 4 to 5 As shown, the optical sensor key in this embodiment at least includes a light guide plate 1, and the light guide plate has a plurality of propagation areas, and each propagation area corresponds to a pair of light emitters 2 and light receivers 3 arranged at intervals, and each propagation area corresponds to The light emitter and the light receiver are arranged below the propagation area, the propagation area and its corresponding pair of light emitters and light receivers form an induction key 11a, 11b, 11c, and the light output by each pair of light emitters can be And it can only propagate in the light propagation area corresponding to the light emitter, and the light receivers in each pair receive the light output from the corresponding propagation area.

[0064] In this embodiment, since each propagation area corresponds to a pair of optical transmitters and optical receivers, the working principle of each pair of optical transmitters and o...

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PUM

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Abstract

The invention discloses an optical sensing key, a touch screen, a fingerprint collecting device and an electronic device. The optical sensing key comprises at least one light guide plate, the light guide plates are provided with transmission areas, a pair of light emitter and a light receiver is correspondingly arranged in each transmission area, the light emitters can transmit light rays at least capable of transmitting in the transmission areas, and the light receiver receives the light rays transmitted by the transmission areas. The optical sensing key is ultrathin in structure, convenient to implement and power saving.

Description

technical field [0001] The invention relates to an optical induction key, a touch screen, a fingerprint collection device and an electronic device. Background technique [0002] As a branch of touch technology, touch key technology aims to solve the problems of easy wear and short life of traditional mechanical key input methods. The existing touch key technology specifically determines the touch position of the finger by detecting small changes in signals such as electric charge. Existing touch buttons are divided into four categories: resistive, capacitive, infrared and surface acoustic wave sensing buttons. [0003] The various touch buttons mentioned above have their own disadvantages. For example, the resistive and capacitive types have sensitivity and false response problems because they measure weak signals, while the infrared type is too thick. The touch screen technology extended by the touch key also has the same defect. [0004] In addition, the optical fingerp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/041
CPCG06F3/0421G06F21/32G06F21/62G06F2203/04109G06V40/1318G06F3/0428
Inventor 张明方
Owner 渭南印象认知技术有限公司
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