CN111766984A - In-cell touch screen and positioning function algorithm thereof - Google Patents

In-cell touch screen and positioning function algorithm thereof Download PDF

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Publication number
CN111766984A
CN111766984A CN202010077562.1A CN202010077562A CN111766984A CN 111766984 A CN111766984 A CN 111766984A CN 202010077562 A CN202010077562 A CN 202010077562A CN 111766984 A CN111766984 A CN 111766984A
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China
Prior art keywords
touch screen
sensor block
area
scanning
sensor
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CN202010077562.1A
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Chinese (zh)
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CN111766984B (en
Inventor
王春武
刘春玲
张桂杰
王立忠
孟昭晖
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Jilin Normal University
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Jilin Normal University
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The invention discloses an in-cell touch screen and a positioning function algorithm thereof. In order to solve the problem, the invention adopts a mode of dividing regions along a diagonal line, meanwhile, the area of each sensor block is different, and the sensor blocks are parallelly and equidistantly divided into a plurality of different regions along the Y-axis direction to form a plurality of scanning channels; each sensor block is connected to the touch screen IC or the IC of the TDDI through a wire respectively; when the touch screen is triggered, scanning a connecting channel of each sensor block to determine a triggered sensor block; then scanning the area divided along the Y-axis direction; converting the scanned charge amount into area, and corresponding to coordinate M in diagonal direction according to the area(1～n)Knowing the slope α of each sensor block, and determining the slope according to trigonometric formulaAnd determining the horizontal and vertical coordinates.

Description

In-cell touch screen and positioning function algorithm thereof
Technical Field
The invention belongs to the technical field of in-cell display panel touch pads.
Background
With the increasing popularity of personal computers, new input modules are being introduced. At present, a novel input mode, namely the principle and the structure of a touch panel (touch panel) are provided. Touch panel is a new input device that completes a point location (pointing) by a light Touch of a finger or a special pen tip on a display panel (display). In terms of classification, the former is of a finger touch type, while the latter is of a stylus touch type. The device has the advantage that the device can directly carry out the junction point while finishing the display. The Pen touch (Pen touch) is mostly used in the occasions with higher precision requirement, such as pictures or handwritten characters. The finger touch type is a case where the stroke precision requirement is not high. Compared with the Pen touch type (Pen touch), the finger touch type does not need to be provided with a special writing Pen, and can complete input only by directly touching the display panel with the finger, which is closer to a natural handwriting input mode. The touch panel of the pen-touch type includes: electromagnetic induction type and electrostatic induction type. The finger touch type touch panel includes: a volume type, an optical type, an acoustic type, a pressure detection type, and a memberane type (transparent conductive film), and the like.
Because the XY axis coordinate type that present touch panel adopted sets up the sensor, need carry out scanning many times when confirming touch point coordinate, reduced sampling rate.
Disclosure of Invention
In order to solve the problems, the invention provides an in-cell touch screen and a positioning function algorithm thereof, wherein the touch screen is divided into a plurality of regions along the diagonal line of the touch screen in parallel, each region is divided into two sensor blocks along the diagonal line of the region, the diagonal lines of the regions are arranged in parallel, the areas of the sensor blocks are different, the sensor blocks are divided into a plurality of different regions along the Y-axis direction in parallel at equal intervals to form a plurality of scanning channels; each sensor block is connected to the touch screen IC or the IC of the TDDI through the wiring respectively.
The positioning function algorithm of the in-cell touch screen specifically comprises the following steps:
1) when the touch screen is triggered, scanning a connecting channel of each sensor block to determine a triggered sensor block; then scanning the area divided along the Y-axis direction;
2) converting the scanned charge amount into area, and corresponding to coordinate M in diagonal direction according to the area(1～n)；
3) Knowing the slope a of the slant of each sensor block, the abscissa (X, Y) is determined according to a trigonometric function formula,
X＝M(1～n)×cosα,Y＝M(1～n)× sin α, wherein the angle α can be adjusted according to the product size, IC specification, etc.
The invention has the beneficial effects that:
the invention discloses a method for determining a touch area through different sensor blocks, and then calculating different touch areas according to the principle of charge variation caused by different contact areas, so as to determine the oblique line position of the specific touch area. And calculating the X and Y coordinate values of the sensor block by a specific function. The touch position calculation can be completed by only one-time scanning, so that the scanning times are reduced, and the sampling rate is improved.
Drawings
FIG. 1 is a schematic diagram of the distribution of sensor blocks on a panel;
fig. 2 is a flow chart of an optimization scanning process.
FIG. 3M determination of touch point coordinates.
Fig. 4M coordinate assignment diagram.
Fig. 5M coordinates.
Detailed Description
In this embodiment, an in-cell touch screen belongs to a capacitive screen, and the touch screen is divided into a plurality of regions along a diagonal line of the touch screen in parallel, the number of the divided regions is related to the size and the characteristics of products, and the number of the divided regions of each product is different. For example, the product in this embodiment is 36 columns and 18 rows, and thus the number of corresponding regions is 36 × 18 — 648.
Each region is divided into two sensor blocks along a region diagonal line, each sensor block corresponds to a capacitor, the region diagonal lines are arranged in parallel, the areas of the sensor blocks are different, and the sensor blocks are divided into a plurality of different regions at equal intervals in parallel along the Y-axis direction; each sensor block is connected to the touch screen IC or the IC of the TDDI through the wiring respectively.
As shown in fig. 3, where M is a touch area, when M is pressed, the amount of charge of Q1-Q8 in fig. 4 and 5 changes.
The positioning function algorithm of the in-cell touch screen specifically comprises the following steps:
1) when the touch screen is triggered, scanning a connecting channel of each sensor block to determine a triggered sensor block; the M1 through M8 regions were then used to scan the charge levels of Q1-Q8, respectively.
The direction of the scanning operation can be determined by a programmer according to the size of the scanning data volume and the resource usage amount. For example: from left to right, from right to left, from two sides to the middle, and simultaneously, the two rows can be downward one by one.
2) Converting the scanned charge amount into area, and corresponding to coordinate M in diagonal direction according to the area(1～n)N represents the corresponding region of M1 to M8;
3) knowing the slope a of the slant of each sensor block, the abscissa (X, Y) is determined according to a trigonometric function formula,
X＝M(1～n)×cosα,Y＝M(1～n)× sin α, wherein the angle α can be adjusted according to the product size, IC specification, etc.

Claims (2)

1. An in-cell touch screen is characterized in that the touch screen is divided into a plurality of regions in parallel along the diagonal line of the touch screen, each region is divided into two sensor blocks along the diagonal line of the region, the diagonal lines of the regions are arranged in parallel, the areas of the sensor blocks are different, the sensor blocks are divided into a plurality of different regions in parallel and equidistantly along the Y-axis direction to form a plurality of scanning channels; each sensor block is connected to the touch screen IC or the IC of the TDDI through the wiring respectively.
2. The location function algorithm of the in-cell touch screen as claimed in claim 1, specifically comprising:
1) when the touch screen is triggered, scanning a connecting channel of each sensor block to determine a triggered sensor block; then scanning the area divided along the Y-axis direction;
2) converting the scanned charge amount into area, and corresponding to coordinate M in diagonal direction according to the area(1～n)；
3) Knowing the slope a of the slant of each sensor block, the abscissa (X, Y) is determined according to a trigonometric function formula,
X＝M(1～n)×cosα,Y＝M(1～n)×sinα。
CN202010077562.1A 2020-01-30 2020-01-30 In-cell touch screen and positioning function algorithm thereof Active CN111766984B (en)

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Citations (8)

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Publication number Priority date Publication date Assignee Title
KR20100137034A (en) * 2009-06-20 2010-12-30 위순임 Touchscreen device
CN102073427A (en) * 2011-01-04 2011-05-25 苏州瀚瑞微电子有限公司 Multi-finger detection method of capacitive touch screen
KR20130028360A (en) * 2011-09-09 2013-03-19 엘지디스플레이 주식회사 Apparatus and method for driving touch screen
US20140293158A1 (en) * 2013-03-27 2014-10-02 Japan Display Inc. Display device with touch detection function and electronic apparatus
US20150309659A1 (en) * 2014-04-25 2015-10-29 Mstar Semiconductor, Inc. Method and touch apparatus for calibrating coordinate value near edge of touch panel
CN106095180A (en) * 2016-06-15 2016-11-09 湖州佳格电子科技股份有限公司 A kind of touch screen scanning method
CN107168596A (en) * 2017-07-25 2017-09-15 业成科技（成都）有限公司 The scan method and capacitive touch screen of capacitive touch screen
CN108415629A (en) * 2017-02-09 2018-08-17 晶门科技（中国）有限公司 A kind of device and its manufacturing method combining capacitance touching control sensor

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Publication number Priority date Publication date Assignee Title
KR20100137034A (en) * 2009-06-20 2010-12-30 위순임 Touchscreen device
CN102073427A (en) * 2011-01-04 2011-05-25 苏州瀚瑞微电子有限公司 Multi-finger detection method of capacitive touch screen
KR20130028360A (en) * 2011-09-09 2013-03-19 엘지디스플레이 주식회사 Apparatus and method for driving touch screen
US20140293158A1 (en) * 2013-03-27 2014-10-02 Japan Display Inc. Display device with touch detection function and electronic apparatus
US20150309659A1 (en) * 2014-04-25 2015-10-29 Mstar Semiconductor, Inc. Method and touch apparatus for calibrating coordinate value near edge of touch panel
CN106095180A (en) * 2016-06-15 2016-11-09 湖州佳格电子科技股份有限公司 A kind of touch screen scanning method
CN108415629A (en) * 2017-02-09 2018-08-17 晶门科技（中国）有限公司 A kind of device and its manufacturing method combining capacitance touching control sensor
CN107168596A (en) * 2017-07-25 2017-09-15 业成科技（成都）有限公司 The scan method and capacitive touch screen of capacitive touch screen

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郑高辉;: "基于ARM内核处理器及SX8644芯片的触摸屏控制器的设计及其应用", 家电科技, no. 04 *

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