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Detection apparatus

A detection device and detection electrode technology, which is applied in the direction of instruments, electrical digital data processing, character and pattern recognition, etc., can solve the problems of data volume expansion, data processing capacity increase, detection time extension, etc.

Pending Publication Date: 2020-06-09
JAPAN DISPLAY INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this method, various burdens corresponding to the detection accuracy increase, for example, due to the increase in the number of combinations, the prolongation of the detection time at one time, the expansion of the amount of data used for detection, and the required data processing capacity Elevate etc.

Method used

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Experimental program
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Embodiment approach 1

[0040] figure 1 It is a block diagram showing a configuration example of the detection device in the first embodiment. figure 2 It is a schematic diagram showing a configuration example of a detection device. image 3 It is a schematic diagram showing a configuration example of a sensor unit included in the detection device. The detection device 100 of this embodiment is a detection device that detects fine unevenness and capacitance between detection electrodes, for example, a fingerprint detection device. Such as figure 1 As shown, the detection device 100 includes a sensor unit 1 , a detection control circuit 11 , a first selection circuit 14 , a second selection circuit 15 , and a detection circuit 40 .

[0041] Such as figure 2 and image 3 As shown, the sensor unit 1 includes an insulating substrate 101, a plurality of detection electrodes Rx provided on one surface 101a side of the substrate 101, a plurality of switching elements SW1, a scanning line GCL connecte...

Embodiment approach 2

[0145] In Embodiment 1, for the implementation Figure 9 The illustrated case of the positive code selection operation Tdp among the positive code selection operation Tdp and the negative code selection operation Tdm based on a predetermined code has been described, but is not limited thereto. In Embodiment 2, the case where the negative code selection operation Tdm is performed will be described below. It should be noted that the same matters as those in Embodiment Mode 1 will not be described in detail.

[0146] Such as Figure 9 As shown, in the negative code selection operation Tdm, the detection control circuit 11 selects the detection electrode Rx of the first selection object according to the selection signal Vgclm corresponding to the component "-1" of the square matrix Hv. In addition, the detection control circuit 11 selects the detection electrode Rx of the second selection object that is not included in the detection electrode Rx of the first selection object amo...

Embodiment approach 3

[0176] In Embodiment 1 and Embodiment 2, the case where only one of the positive code selection operation Tdp and the negative code selection operation Tdm is performed has been described, but the present invention is not limited thereto. There may be a first mode in which one of Embodiment 1 or Embodiment 2 is executed, and a second mode in which both the positive code selection operation Tdp and the negative code selection operation Tdm are executed. It should be noted that the same description as that of Embodiment 1 and Embodiment 2 will be omitted.

[0177] In the second mode, the first control circuit 114 outputs the selection signal Vgclp and the selection signal Vgclm to the first selection circuit 14, and the first selection circuit 14 selects the detection electrode block RxB according to the selection form of both the selection form Cpp and the selection form Cpm. The included detection electrode Rx is connected to the data line SGL. The second selection circuit co...

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Abstract

A detection apparatus includes: a plurality of detection electrodes; a detection circuit configured to be coupled to the detection electrodes; and a coupling circuit configured to cause the detectionelectrodes to be a coupled state in which the detection electrodes are coupled to the detection circuit and a non-coupled state in which the detection electrodes are uncoupled from the detection circuit. The detection apparatus has a plurality of selection patterns of the detection electrodes causing detection electrodes as first selection targets among the detection electrodes to be the coupled state and causing detection electrodes as second selection targets to be the non-coupled state. The selection patterns do not include any selection patterns causing detection electrodes as the first selection targets to be the non-coupled state and causing detection electrodes as the second selection targets to be the coupled state.

Description

[0001] Cross References to Related Applications [0002] The entire contents of the original application filed on November 30, 2018, that is, Japanese Patent Application No. 2018-226099 are incorporated herein by reference. This application enjoys the benefit of priority of this original application. technical field [0003] The invention relates to a detection device. Background technique [0004] In a detection device capable of detecting an external approaching object based on a change in capacitance, as a method of improving accuracy by switching various forms of combinations of detection electrodes used for detection and detection electrodes not used for detection among a plurality of detection electrodes, there have been A method described in JP 2017-188106 A is known. [0005] The premise of the method described in Japanese Patent Application Laid-Open No. 2017-188106 is that, in one detection, the positional relationship between the detection electrode used for det...

Claims

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Application Information

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IPC IPC(8): G06K9/00G06F3/044
CPCG06F3/044G06V40/1306G06F3/04166G06F2203/04107G06F3/0446G06F2203/04108G06V40/1312
Inventor 上原利范
Owner JAPAN DISPLAY INC
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