CN117311546A - Touch screen pressure detection method and device based on infrared light shielding - Google Patents
Touch screen pressure detection method and device based on infrared light shielding Download PDFInfo
- Publication number
- CN117311546A CN117311546A CN202311454363.8A CN202311454363A CN117311546A CN 117311546 A CN117311546 A CN 117311546A CN 202311454363 A CN202311454363 A CN 202311454363A CN 117311546 A CN117311546 A CN 117311546A
- Authority
- CN
- China
- Prior art keywords
- value
- touch screen
- infrared energy
- infrared
- receiving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 19
- 239000011324 bead Substances 0.000 claims abstract description 81
- 230000008859 change Effects 0.000 claims abstract description 35
- 238000000034 method Methods 0.000 claims abstract description 16
- 238000009499 grossing Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 7
- 239000011049 pearl Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000003993 interaction Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 244000126010 Pithecellobium dulce Species 0.000 description 1
- 235000002194 Pithecellobium dulce Nutrition 0.000 description 1
- 235000007891 Pithecellobium lobatum Nutrition 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
Classifications
-
- 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
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
-
- 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
- G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- User Interface Of Digital Computer (AREA)
Abstract
The application provides a touch screen pressure detection method and device based on infrared light shielding, wherein the method comprises the following steps: acquiring initial infrared energy values received by each receiving lamp bead; acquiring pressing infrared energy values received by all receiving lamp beads; calculating an infrared energy variation value according to the initial infrared energy value and the pressing infrared energy value; correcting the infrared energy variation value to remove noise; and determining the pressure value of the touch screen according to the maximum value of the infrared energy variation value. According to the invention, deformation and infrared light shielding effect generated near the pressing area of the touch screen are detected, the infrared energy reference value of each receiving lamp bead is obtained, the touch screen is pressed, the infrared energy value of each receiving lamp bead is obtained, the energy change value is calculated, noise data is corrected, and finally, the pressure value is determined according to the maximum value of the energy change, so that the pressing force is accurately measured.
Description
Technical Field
The application relates to the technical field of infrared touch screen pressure detection, in particular to a touch screen pressure detection method and device based on infrared light shielding.
Background
The touch screen is common man-machine interaction equipment and is widely applied to equipment such as touch screens, electronic signature boards and the like. The touch screen pressure detection technology is used for realizing accurate sensing and response to touch operation by detecting the pressing force of a user on a touch screen.
The traditional touch screen pressure detection technology has the problems of low precision, low response speed and the like. And when the touch screen is pressed, accurate measurement of pressing force is an important requirement for realizing high-precision touch interaction.
Disclosure of Invention
In order to solve the above problems, the application provides a touch screen pressure detection method and device based on infrared light shielding, which measures the infrared energy change value received by a receiving lamp bead by utilizing deformation and infrared light shielding effect generated near a touch screen pressing area, and judges the pressing force of the touch screen by measuring the energy change of infrared light, so as to accurately measure the pressing force.
The application is realized by the following technical scheme:
the application provides a touch screen pressure detection method and device based on infrared light shielding, wherein the detection method comprises the following steps:
(1) Acquiring initial infrared energy values received by each receiving lamp bead;
(2) Acquiring pressing infrared energy values received by all receiving lamp beads;
(3) Calculating an infrared energy change value on each receiving lamp bead according to the initial infrared energy value and the pressing infrared energy value of each receiving lamp bead;
(4) Correcting the infrared energy change value of each receiving lamp bead, removing noise, and obtaining a corrected infrared energy change value;
(5) And determining the pressure value of the touch screen according to the maximum value of the infrared energy variation value.
Further, in the step (1), the method for obtaining the initial infrared energy value includes:
when the touch screen is not pressed, the infrared energy value received by each receiving lamp bead is recorded as an initial infrared energy value.
Further, in the step (2), the method for obtaining the final infrared energy value includes:
when the touch screen is pressed, the infrared energy value received by each receiving lamp bead is recorded as the pressing infrared energy value.
Further, in step (3), the calculation formula of the infrared energy variation value on the receiving lamp bead is as follows:
ΔS＝S i -S 0
wherein DeltaS is the change value of infrared energy, S i To press the infrared energy value S 0 Is the initial infrared energy value.
Further, in the step (4), the method of correction is as follows:
and correcting and smoothing the infrared energy change value by adopting a filter.
Further, in step (5), the method for determining the maximum value of the infrared energy variation value includes:
and comparing the corrected infrared energy change values of the receiving lamp beads, and selecting the value with the largest infrared energy change value as the pressure value of the touch screen.
Further, a touch-sensitive screen pressure detection device based on infrared light shelters from, includes:
a touch screen;
emitting a lamp bead;
receiving the lamp beads;
the light emitting beads and the light receiving beads are arranged in a plurality, and the light emitting beads and the light receiving beads are arranged below the touch screen.
Further, the touch screen is square, a plurality of sending lamp beads are arranged along two right-angle sides of the touch screen, and a plurality of receiving lamp beads are arranged along the other two right-angle sides of the touch screen.
The beneficial effects of this application: (1) When the touch screen is pressed, the infrared light shielding effect is caused by deformation near the pressing area, so that the infrared energy received by the receiving lamp beads is changed, a direct relation exists between the energy change value and the pressing force, the pressing force of the touch screen can be accurately reflected by measuring the infrared energy change value of the receiving lamp beads, and the accuracy is high.
(2) According to the invention, through detecting the change of infrared energy in real time, the pressing condition of the touch screen can be perceived in real time, and the response speed is high, so that the touch screen can capture the operation of a user more sensitively, and better interaction experience is provided.
(3) The method is based on the physical principle for detection, has higher reliability and stability, and the infrared light shielding principle is a direct and reliable way for measuring the pressing force of the touch screen, so that errors and inaccuracy possibly occurring in the traditional method are avoided.
Drawings
FIG. 1 is a schematic diagram of a measuring device according to the present invention;
FIG. 2 is a schematic diagram of the press deformation of the touch screen according to the present invention;
fig. 3 is a schematic diagram showing the change of infrared energy of the lamp beads before and after pressing.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present application are merely used to explain the relative positional relationship, movement conditions, and the like between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicators are correspondingly changed.
Furthermore, the descriptions of "first," "second," and the like, herein are for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
Referring to fig. 1, the application provides a touch screen pressure detection device based on infrared light shielding, which comprises a touch screen, a transmitting lamp bead and a receiving lamp bead. The sending lamp pearl and the receiving lamp pearl all set up a plurality of, and a plurality of sending lamp pearls and receiving lamp pearl set up in the touch-sensitive screen below. The touch screen is located the top of sending lamp pearl and receiving lamp pearl for receive user's press. The touch screen may employ a conventional capacitive touch screen or other type of touch screen. The emitting light beads are infrared light sources for emitting infrared light and irradiating the surface of the touch screen, and the infrared light sources can be a group of infrared emitting diodes or other applicable infrared light sources. The receiving lamp beads are positioned below the infrared light source and used for receiving infrared light. The receiving beads may be a set of infrared light receiving diodes or other suitable receiving means. The array of receiving light beads is arranged below the touch screen, opposite to the surface of the touch screen. In this embodiment, the touch screen is square, and the plurality of transmitting beads are arranged along two right-angle sides of the touch screen to form a transmitting bead array, and the plurality of receiving beads are arranged along the other two right-angle sides of the touch screen to form a receiving bead array. As shown in FIG. 1, the relative positions of the touch screen, infrared light source and receiving bead array are shown. The touch screen is positioned above the receiving bead array and is matched with the receiving bead array. The black beads are transmitting beads, the white beads are receiving beads, and the receiving bead arrays are used for receiving infrared light. When the touch screen is pressed, the touch screen deforms to shield infrared light, so that the receiving lamp beads can not receive the infrared light or can only partially receive the infrared light. At this time, the pressing value can be detected by measuring the infrared energy value of the receiving lamp bead. As shown in fig. 2, fig. 2 is a schematic diagram of pressing deformation of the touch screen, and illustrates deformation and infrared light shielding effect generated when the touch screen is pressed. The depression generated in the pressing area of the touch screen, the protrusion generated by the deformation nearby, and the partial shielding effect of the infrared light near the pressing area are displayed.
Specifically, the touch screen pressure detection method based on infrared light shielding comprises the following steps:
s1, acquiring initial infrared energy values received by all receiving lamp beads.
Specifically, when the touch screen is not pressed, the infrared energy value of each receiving lamp bead is recorded, and the infrared energy value is used as a reference value for calculating subsequent energy change. It should be noted that the measurement may be obtained by performing an individual measurement for each receiving bead, or by performing an array measurement for the whole receiving beads.
S2, obtaining the pressing infrared energy value received by each receiving lamp bead.
Specifically, pressing the touch screen, when the touch screen is pressed, deformation is generated near the touch area, infrared light is shielded, and the infrared energy of part of receiving lamp beads is changed. At this time, the infrared energy value of each receiving lamp bead is recorded. It should be noted that, an appropriate signal processing circuit or module is used to extract and measure the infrared energy values before and after the touch screen is pressed.
S3, calculating the infrared energy change value on each receiving lamp bead according to the initial infrared energy value and the pressing infrared energy value of each receiving lamp bead.
Specifically, the infrared energy value of each receiving lamp bead when the touch screen is pressed is compared with the reference value when the corresponding touch screen is not pressed, and the infrared energy value when the touch screen is not pressed is subtracted from the infrared energy value when the touch screen is pressed, so that the infrared energy change value can be obtained.
S4, correcting the infrared energy change value of each receiving lamp bead, removing noise, and obtaining the corrected infrared energy change value.
Specifically, in order to remove the influence of noise and interference that may be present on the infrared energy variation value data, in the present embodiment, a filter is used to correct and smooth the infrared energy variation value data to remove random noise that may be generated.
S5, determining the pressure value of the touch screen according to the maximum value of the infrared energy change value.
Specifically, the pressure value of the touch screen is determined according to the maximum value of the infrared energy variation value. The larger the energy change, the greater the compression force. According to a preset pressure-energy change relation curve or an empirical formula, converting the energy change value into a corresponding pressure value, finding the maximum value of the energy change, and taking the maximum value as a pressure value index of the touch screen.
As shown in fig. 3, fig. 3 is a schematic diagram showing the change of infrared energy of the received lamp beads before and after pressing. The change of infrared light energy before and after the touch screen is pressed is shown. Before pressing, infrared light passes through the touch screen from an infrared light source and directly reaches the receiving bead array, and a high-energy signal is generated. After pressing, the touch screen is pressed and deformed, so that part of infrared light is shielded or scattered, and the energy of light reaching the receiving lamp bead array is reduced, and a low-energy signal is generated. When the pressing force is larger, the deformation area is larger, the shielding effect is stronger, and the energy received by the receiving lamp beads is smaller. By detecting energy changes, touch location and force can be determined.
The touch screen is used for deforming when being pressed, the transmitting lamp bead array is used for transmitting infrared light, and the receiving lamp bead array is used for receiving infrared light. When the touch screen is pressed, deformation is generated nearby the touch screen, partial shielding effect is generated on the receiving lamp beads, infrared energy received by the receiving lamp beads is changed, and the pressure value is measured by detecting the change quantity of the infrared energy received by the receiving lamp beads, so that the pressure detection of the touch screen by utilizing the infrared shielding principle is realized. Compared with the prior art, the method and the device can accurately measure the pressing force of the touch screen, have the advantages of high accuracy, high response speed, high reliability and the like, and are suitable for various application fields needing pressing force sensing, such as electronic equipment, interactive interfaces and the like. The user can control the operation of the touch screen more finely and realize more diversified interaction modes.
Of course, there are various other embodiments of the present application, and based on this embodiment, those of ordinary skill in the art may obtain other embodiments without any inventive effort, which fall within the scope of the present application.
Claims (8)
1. The touch screen pressure detection method based on infrared light shielding is characterized by comprising the following steps of:
(1) Acquiring initial infrared energy values received by each receiving lamp bead;
(2) Acquiring pressing infrared energy values received by all receiving lamp beads;
(3) Calculating an infrared energy change value on each receiving lamp bead according to the initial infrared energy value and the pressing infrared energy value of each receiving lamp bead;
(4) Correcting the infrared energy change value of each receiving lamp bead, removing noise, and obtaining a corrected infrared energy change value;
(5) And determining the pressure value of the touch screen according to the maximum value of the infrared energy variation value.
2. The method for detecting pressure of a touch screen based on infrared light shielding according to claim 1, wherein in the step (1), the method for acquiring the initial infrared energy value is as follows:
when the touch screen is not pressed, the infrared energy value received by each receiving lamp bead is recorded as an initial infrared energy value.
3. The method for detecting pressure of a touch screen based on infrared light shielding according to claim 1, wherein in the step (2), the method for obtaining the final infrared energy value is as follows:
when the touch screen is pressed, the infrared energy value received by each receiving lamp bead is recorded as the pressing infrared energy value.
4. The method for detecting pressure of a touch screen based on infrared light shielding according to claim 1, wherein in the step (3), a calculation formula of the infrared energy variation value on the receiving lamp bead is:
ΔS＝S i -S 0
wherein DeltaS is the change value of infrared energy, S i To press the infrared energy value S 0 Is the initial infrared energy value.
5. The method for detecting pressure of an infrared light shielding-based touch screen according to claim 1, wherein in the step (4), the method for correcting is as follows:
and correcting and smoothing the infrared energy change value by adopting a filter.
6. The infrared light shielding-based touch screen pressure detection method according to claim 1, wherein in the step (5), the maximum value determination method of the infrared energy variation value is as follows:
and comparing the corrected infrared energy change values of the receiving lamp beads, and selecting the value with the largest infrared energy change value as the pressure value of the touch screen.
7. Touch-sensitive screen pressure detection device based on infrared light shelters from, characterized in that includes:
a touch screen;
emitting a lamp bead;
receiving the lamp beads;
the light emitting beads and the light receiving beads are arranged in a plurality, and the light emitting beads and the light receiving beads are arranged below the touch screen.
8. The infrared light shielding-based touch screen pressure detection device of claim 7, wherein the touch screen is square, a plurality of transmitting beads are arranged along two right-angle sides of the touch screen, and a plurality of receiving beads are arranged along the other two right-angle sides of the touch screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311454363.8A CN117311546A (en) | 2023-11-03 | 2023-11-03 | Touch screen pressure detection method and device based on infrared light shielding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311454363.8A CN117311546A (en) | 2023-11-03 | 2023-11-03 | Touch screen pressure detection method and device based on infrared light shielding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117311546A true CN117311546A (en) | 2023-12-29 |
Family
ID=89286556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311454363.8A Pending CN117311546A (en) | 2023-11-03 | 2023-11-03 | Touch screen pressure detection method and device based on infrared light shielding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117311546A (en) |
-
2023
- 2023-11-03 CN CN202311454363.8A patent/CN117311546A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10877581B2 (en) | Detecting touch input force | |
| US20100066697A1 (en) | Pressure measurement device and corresponding method | |
| US10162443B2 (en) | Virtual keyboard interaction using touch input force | |
| KR101973161B1 (en) | Touch input apparatus and method based on pressure sensor | |
| US20080100586A1 (en) | Method and system for calibrating a touch screen | |
| US10379683B2 (en) | Pressure and touch sensitive panel, system and touch sensitive processing apparatus and method thereof | |
| CN101957682B (en) | Method for implementing load identification interactive whiteboard | |
| US20120200530A1 (en) | Input device, and method for detecting the contact position of the device | |
| US9886153B2 (en) | Touch sensing method and system for avoiding display noises | |
| KR20170131680A (en) | Touch Pressure Test Apparatus and Method | |
| US9552111B2 (en) | Touch sensing device and method of identifying a touched position | |
| US10884563B2 (en) | Method for determining change of initial distance of sensing electrode | |
| US10133404B2 (en) | Method and system for processing pressure sensing signal | |
| JP4798665B2 (en) | Touch panel device | |
| US11907464B2 (en) | Identifying a contact type | |
| US20200218425A1 (en) | Touch positioning method and apparatus, and electronic device | |
| US10416829B1 (en) | Touch sensitive processing apparatus, system and method thereof | |
| CN117311546A (en) | Touch screen pressure detection method and device based on infrared light shielding | |
| CN111189564B (en) | Pressure measuring device | |
| US20200310583A1 (en) | Methods and techniques for correcting pressure sensor data in the presence of abnormal pressure sensor readings | |
| US10942602B1 (en) | Electronic device with finger touch detection and related methods | |
| JP6495341B2 (en) | Method and apparatus for locating an operation on a touch-sensitive surface | |
| US20100309138A1 (en) | Position detection apparatus and method thereof | |
| US8350825B2 (en) | Touch panel and touching point detection method thereof | |
| CN110380715B (en) | Detection method and detection device for capacitive touch key |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |