CN110609641A - Touch pen, display panel, touch display device and method - Google Patents
Touch pen, display panel, touch display device and method Download PDFInfo
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- CN110609641A CN110609641A CN201910743729.0A CN201910743729A CN110609641A CN 110609641 A CN110609641 A CN 110609641A CN 201910743729 A CN201910743729 A CN 201910743729A CN 110609641 A CN110609641 A CN 110609641A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/13338—Input devices, e.g. touch panels
-
- 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
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
- G06F3/03545—Pens or stylus
-
- 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
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Human Computer Interaction (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optics & Photonics (AREA)
- Position Input By Displaying (AREA)
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
Abstract
Disclosed are a touch pen, a display panel, a touch display device and a touch display method. The stylus includes: an acoustic wave generator for generating an acoustic wave; an acoustic wave receiver for receiving a reflected wave generated by reflecting the acoustic wave by the reflecting surface; and a detecting device for detecting a pattern corresponding to the contact on the reflecting surface based on a time difference between the emission time of the acoustic wave and the return time of the corresponding reflected wave, and obtaining a coordinate position corresponding to the contact based on the detected pattern. The stylus transmits a sound wave and receives a reflected wave provided by the reflection surface having the pattern, and determines the pattern of the reflection surface where the touch point is located, thereby accurately locating the coordinate position where the touch point is located.
Description
Technical Field
The present invention relates to the field of touch display technologies, and in particular, to a touch pen, a display panel, a touch display device and a touch display method.
Background
With the popularization of touch display devices, the application of touch pens is becoming more and more widespread. The stylus includes a passive pen and an active pen. The active pen on the current market mainly comprises a capacitive pen and an electromagnetic pen, wherein the capacitive pen is designed by utilizing a capacitive sensing principle, and the electromagnetic pen is designed by utilizing a cutting magnetic field sensing principle. The electromagnetic pen needs to be matched with an electromagnetic touch screen for use, and the cost is high. The electric capacity that the electric capacity pen formed can change along with the difference of temperature, humidity and ground connection condition to receive the false response that people's hand mistake touched the result easily, its stability is relatively poor, often can produce the drift phenomenon.
Therefore, further improvements to the prior art stylus are needed to solve the above problems.
Disclosure of Invention
In view of the foregoing problems, an object of the present invention is to provide a touch pen, a display panel, a touch display device and a method, so as to achieve accurate positioning of touch display, improve stability of the touch pen, and save cost.
According to a first aspect of the present invention, there is provided a stylus comprising: an acoustic wave generator for generating an acoustic wave; an acoustic wave receiver for receiving a reflected wave generated by reflecting the acoustic wave by the reflecting surface; and a detecting device for detecting a pattern corresponding to the contact on the reflecting surface based on a time difference between an emission time of the acoustic wave and a return time of the corresponding reflected wave, and obtaining a coordinate position corresponding to the contact based on the detected pattern.
Preferably, the method further comprises the following steps: bluetooth for transmitting the coordinate position of the touch point.
According to a second aspect of the present invention, there is provided a display panel comprising: a cover plate; and a plurality of structural layers located under the cover plate for providing a display screen, wherein one of the structural layers has a reflection surface for reflecting sound waves, the reflection surface is divided into a plurality of regions according to different coordinate positions, each region has a corresponding pattern, and the patterns of different regions are different.
Preferably, the pattern comprises one of a plurality of different depths of the grooves, a plurality of different heights of the protrusions, a plurality of different sizes of the grooves, a plurality of different sizes of the protrusions and the blind text, and any combination thereof.
Preferably, the coordinate position includes a row coordinate and a column coordinate, the pattern includes a pattern representing the row coordinate and a pattern representing the column coordinate, and the pattern representing the row coordinate and the pattern representing the column coordinate are distributed on both sides of the area.
Preferably, a plurality of said regions are rectangular in shape, each said region having a side of 2 to 6 mm.
Preferably, the plurality of structural layers comprise any one or more of a back plate, a backlight plate and a circuit board substrate, and the pattern is formed on the back plate, the backlight plate or the circuit board substrate.
According to a third aspect of the present invention, there is provided a touch display device comprising: a stylus as described above and a display panel as described above.
According to a fourth aspect of the present invention, there is provided a touch display method, comprising: emitting sound waves; reflecting the acoustic wave by a reflecting surface to generate a reflected wave; receiving the reflected wave, detecting a pattern corresponding to a contact on the reflecting surface according to a time difference between the sending time of the sound wave and the return time of the corresponding reflected wave, and obtaining a coordinate position corresponding to the contact according to the detected pattern; and displaying the picture according to the coordinate position.
Preferably, the pattern includes a plurality of grooves or projections, and the reflected wave includes a plurality of echoes corresponding to the grooves or the projections of the pattern, respectively.
According to the touch pen, the display panel, the touch display device and the touch display method, the display panel is provided with the reflection surface with the patterns, the touch pen transmits sound waves and receives reflected waves provided by the reflection surface, the patterns of the reflection surface where the touch points are located are determined, and therefore the coordinate positions where the touch points are located are accurately located.
Furthermore, the structural layer of the display panel is divided into a plurality of areas, a pattern containing the coordinate positions of the areas is formed, and the accuracy of touch display can be further adjusted by adjusting the area size of each area.
Furthermore, the touch pen, the display panel, the touch display device and the touch display method adopt the acoustic wave positioning principle, the acoustic wave directivity is strong, the propagation distance in the medium is long, the acoustic wave detection is rapid and convenient, the calculation is simple, the real-time control is easy to realize, the stability of the touch pen is improved, and the delay time of the touch display is reduced.
Furthermore, the touch pen, the display panel, the touch display device and the touch display method adopt the acoustic wave positioning principle, and the problems of positioning errors and display errors caused by the fact that a human hand touches the display panel by mistake are solved.
Furthermore, the touch pen, the display panel, the touch display device and the method have low cost for forming patterns on the backlight module, only the ultrasonic transceiver needs to be arranged in the touch pen, and the sound wave receiver does not need to be integrated on the panel, so that the cost is reduced, and the thickness of the panel is reduced.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:
FIG. 1 illustrates a cross-sectional view of a touch display device according to an embodiment of the invention;
FIG. 2 shows a top view of a structural layer according to an embodiment of the invention;
FIG. 3 shows an enlarged view of FIG. 2;
fig. 4 shows a flowchart of a touch display method according to an embodiment of the present invention.
Detailed Description
Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by the same or similar reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale.
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples.
Fig. 1 illustrates a cross-sectional view of a touch display device according to an embodiment of the present invention.
As shown in fig. 1, the touch display device 100 includes a display panel 110 and a stylus 120.
The display panel 110 includes a cover 119 and a plurality of structural layers under the cover 119 for displaying images. In this embodiment, one of the plurality of structural layers has a reflection surface for reflecting sound waves, and the reflection surface is divided into a plurality of regions according to different coordinate positions (see fig. 2 and 3), each region has a corresponding pattern, and the patterns of the different regions are different.
Taking the lcd panel as an example, the lcd panel includes a cover 119, a backlight module 101, and an array substrate, a color filter substrate and a liquid crystal layer between the backlight module 101 and the cover 119. The array substrate includes a polarizer 111, a glass substrate 112, and a first electrode 113, the liquid crystal layer includes a liquid crystal molecular layer 114 and alignment films (not shown) on both sides of the liquid crystal molecular layer, and the color filter substrate includes a second electrode 115, a color filter 116, a glass substrate 117, and a polarizer 118. When a voltage is applied to the display panel 110, the array substrate and the color filter substrate form a parallel plate capacitor, and when the voltage changes, liquid crystal molecules in the liquid crystal layer are turned under the action of an electric field.
The backlight module 101 is used for providing a light source to make the display panel 110 display a picture. In this embodiment, the backlight module 101 includes a backlight panel and a circuit board, the circuit board includes a circuit board substrate and an electronic circuit on the circuit board substrate, a surface of the backlight panel or the circuit board substrate provides a reflection surface for reflecting sound waves, the surface of the backlight panel or the circuit board substrate is divided into a plurality of regions, each region has a different pattern, and the pattern of each region represents a coordinate position of the region. Preferably, the backlight plate is an aluminum backlight plate, and the pattern is formed on a surface of the backlight plate or an insulating surface of the circuit board substrate. In alternative embodiments, the structural layer for providing the reflection surface for reflecting the sound wave may be another structural layer in the display device, for example, the structural layer of the display device further includes a back plate located below the backlight module 101 and having an inner cavity for accommodating the backlight module 101, wherein the structural layer for providing the reflection surface for reflecting the sound wave is any one of the back plate, the backlight plate and the circuit board substrate.
In the embodiment, the liquid crystal display panel is taken as an example to obviously show the internal structure and the connection relationship of the panel, but the display panel of the invention is not limited to the liquid crystal display panel, and the display panel can also be a plasma display panel, an LED display panel, an OLED display panel or other types of display panels, and the internal structure of the display panel is not limited thereto.
Stylus 120 includes an acoustic generator 121, an acoustic receiver 122, a detection device 123, bluetooth 124, and a battery 125.
The acoustic wave generator 121 is configured to generate an acoustic wave, the acoustic wave receiver 122 is configured to receive a reflected wave generated by reflecting the acoustic wave by the reflecting surface, and the detecting device 123 is configured to detect a pattern corresponding to the contact point P on the reflecting surface based on a time difference between an emission time of the acoustic wave and a return time of the corresponding reflected wave, and obtain a coordinate position corresponding to the contact point P based on the detected pattern. Preferably, the sound wave generator 121 generates ultrasonic waves which have strong directivity and can effectively propagate in a plurality of different media.
Bluetooth 124 sends at least the coordinate position of contact P to display panel 110 and battery 125 is used to provide the operating voltage required by stylus 120. Preferably, the bluetooth 124 is further configured to send pressure information of the touch point P to the display panel 110, and complete pairing between the display panel 110 and the stylus 120, so as to avoid a false response caused by receiving an interference signal by the display panel 110 and the stylus 120.
In the touch display device 100, the touch display method is as follows: after the pairing between the display panel 110 and the stylus pen 120 is completed, the stylus pen 120 is in contact with the display panel 110 at the contact point P, and the sound wave generator 121 generates a sound wave, which propagates in the arrow direction in fig. 1; after the ultrasonic wave is transmitted to the backlight module 101, the ultrasonic wave is reflected on the reflection surface of the backlight module 101, and because the reflection surface of the backlight module 101 has patterns representing coordinate positions of different areas, the reflected wave received by the acoustic wave receiver 122 includes a plurality of echoes reaching the acoustic wave receiver 122 at different times, and the detection device 123 can obtain the coordinate position of the contact point P according to the time difference between the sending time of the acoustic wave and the return time of the corresponding reflected wave; the bluetooth 124 transmits the coordinate position of the touch point P to the display panel 110, and the touch display can be completed. During a period of time, the acoustic wave generator 121 continuously transmits a plurality of acoustic waves, the acoustic wave receiver 122 receives the corresponding reflected waves, and the detection device 123 can obtain the motion trajectory of the touch point between the stylus pen 120 and the display panel 110 during the period of time, i.e. the touch display during the period of time can be completed.
FIG. 2 shows a top view of a structural layer according to an embodiment of the invention; fig. 3 shows an enlarged view of fig. 2.
As shown in fig. 2, the structural layer is exemplified by a backlight plate or a circuit board substrate in the backlight module 101, a surface of the backlight plate or the circuit board substrate in the backlight module 101 provides a reflection surface for reflecting sound waves, the surface of the backlight plate or the circuit board substrate is divided into a plurality of regions 102, for example, m rows and n columns, each region 102 has a different pattern, and the pattern of each region 102 represents a coordinate position of the region 102. Wherein m and n are natural numbers. Preferably, each region 102 is rectangular, each region 102 has a side of 2 to 6 mm, and the side of each region 102 is preferably 4.2 mm, so as to reduce the difficulty of the patterning process under the condition that the coordinate position can be accurately obtained.
As shown in fig. 3, taking 30 th to 31 th row areas 102 in 20 th to 22 th columns as an example, the 9 areas 102 have different patterns 103, the left pattern 103 in each area 102 represents the column coordinates of the area 102, and the right pattern 103 represents the row coordinates of the area 102. Each pattern 103 representing column coordinates or row coordinates may be a groove or a protrusion with a different depth and any combination thereof, or a groove or a protrusion with a different size and any combination thereof, or a combination of braille or other patterns 103 with grooves or protrusions. In alternative embodiments, each pattern 103 may be located anywhere on each region 102.
In this embodiment, the pattern 103 of the plurality of regions 102 includes first protrusions, second protrusions, first grooves, second grooves, and any combination thereof, respectively, each first protrusion representing the number 1, each second protrusion representing the number 5, each first groove representing the number 10, and each second groove representing the number 20.
For example, if the column coordinate of the region X20Y30 is 20 and the row coordinate is 30, the second groove is formed on the left side of the region X20Y30, and the first groove and the second groove are formed on the right side; the area X21Y30 has a column coordinate of 21 and a row coordinate of 30, and the first protrusion and the second groove are formed on the left side and the first groove and the second groove are formed on the right side of the area X21Y 30. By analogy, the regions 102 different in m rows and n columns form patterns 103 that can represent the coordinate positions of the regions 102, respectively.
After the stylus transmits the sound wave, the reflection surface reflects the sound wave, the stylus receives the reflected wave, the reflected wave comprises a plurality of sequentially received echoes, and according to the time difference between the transmitting time of the sound wave and the returning time of the reflected wave, the positions and the number of the bulges and the grooves in the pattern 103 of the area 102 where the stylus is located can be judged, so that the coordinate position of the stylus on the display panel can be obtained.
In alternative embodiments, the coordinate position of the region 102 is characterized, for example, by the use of first, second, third and fourth grooves for the numbers 1, 5, 10 and 20, respectively, or by the use of more different depths of the grooves or different heights of the protrusions for the different numbers, respectively, or by the use of a braille pattern. The present application is not limited by the shape of the pattern 103 as long as each region 102 has a different pattern 103 that can reflect a different reflected wave.
Fig. 4 shows a flowchart of a touch display method according to an embodiment of the present invention.
In step S101, a sound wave, such as an ultrasonic wave or an infrasonic wave, is emitted, preferably an ultrasonic wave is emitted. In a preferred embodiment, the pairing between the stylus and the display panel is done before the acoustic wave is emitted.
In step S102, the reflection surface reflects the acoustic wave to generate a reflected wave. The reflecting surface is divided into a plurality of areas according to different coordinate positions, each area is provided with a corresponding pattern, and the patterns of the different areas are different.
In a preferred embodiment, the pattern comprises one of a plurality of different depths of the grooves, a plurality of different heights of the protrusions, a plurality of different sizes of the grooves, a plurality of different sizes of the protrusions, and a blind text, and any combination thereof. The coordinate position includes a row coordinate and a column coordinate, the pattern includes a pattern representing the row coordinate and a pattern representing the column coordinate, and the pattern representing the row coordinate and the pattern representing the column coordinate are distributed on both sides of the area. The plurality of regions are rectangular in shape, each region having a side of 2 to 6 mm, preferably 4.2 mm. The plurality of structural layers comprise any one or more of a back plate, a backlight plate and a circuit board substrate, and the pattern is formed on the back plate, the backlight plate or the circuit board substrate.
In step S103, the reflected wave is received to obtain the coordinate position of the touch point. In this step, a pattern corresponding to the contact on the reflection surface is detected from a time difference between the emission time of the acoustic wave and the return time of the corresponding reflected wave, and a coordinate position corresponding to the contact is obtained from the detected pattern. Preferably, the pattern includes a plurality of grooves or projections, and the reflected wave includes a plurality of echoes respectively corresponding to the grooves or projections of the pattern.
In step S104, a frame is displayed according to the coordinate position of the touch point to complete the touch display.
The above steps show a touch display method at a certain point of time. In a preferred embodiment, a plurality of sound waves are continuously generated within a period of time, and the sound waves correspond to the reflected waves to obtain a motion trajectory of the touch point within the period of time, so as to complete touch display.
While embodiments in accordance with the invention have been described above, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. A stylus, comprising:
an acoustic wave generator for generating an acoustic wave;
an acoustic wave receiver for receiving a reflected wave generated by reflecting the acoustic wave by the reflecting surface; and
and the detection device is used for detecting a pattern corresponding to the contact on the reflecting surface according to a time difference value between the sending time of the sound wave and the return time of the corresponding reflected wave, and acquiring a coordinate position corresponding to the contact according to the detected pattern.
2. The stylus of claim 1, further comprising: bluetooth for transmitting the coordinate position of the touch point.
3. A display panel, comprising:
a cover plate; and
a plurality of structural layers positioned below the cover plate for providing a display picture,
wherein one of the plurality of structural layers has a reflection surface for reflecting acoustic waves, the reflection surface is divided into a plurality of regions according to different coordinate positions, each of the regions has a corresponding pattern, and the patterns of the different regions are different.
4. The display panel of claim 3, wherein the pattern comprises one of grooves of various depths, protrusions of various heights, grooves of various sizes, protrusions of various sizes, and blind text, and any combination thereof.
5. The display panel according to claim 3, wherein the coordinate position comprises row coordinates and column coordinates, the pattern comprises a pattern representing the row coordinates and a pattern representing the column coordinates, and the pattern representing the row coordinates and the pattern representing the column coordinates are distributed on both sides of the area.
6. The display panel of claim 3, wherein the plurality of regions are rectangular in shape, and each region has a side of 2 to 6 mm.
7. The display panel of claim 3, wherein the plurality of structural layers comprises any one or more of a backplane, a backlight, and a circuit board substrate, and wherein the pattern is formed on the backplane, the backlight, or the circuit board substrate.
8. A touch display device, comprising:
a stylus as claimed in claim 1 or 2 and a display panel as claimed in any one of claims 3 to 7.
9. A touch display method is characterized by comprising the following steps:
emitting sound waves;
reflecting the acoustic wave by a reflecting surface to generate a reflected wave;
receiving the reflected wave, detecting a pattern corresponding to a contact on the reflecting surface according to a time difference between the sending time of the sound wave and the return time of the corresponding reflected wave, and obtaining a coordinate position corresponding to the contact according to the detected pattern; and
and displaying the picture according to the coordinate position.
10. The touch display method according to claim 9, wherein the pattern includes a plurality of grooves or protrusions, and the reflected wave includes a plurality of echoes, and the plurality of echoes respectively correspond to the grooves or the protrusions of the pattern.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910743729.0A CN110609641B (en) | 2019-08-13 | 2019-08-13 | Touch pen, display panel, touch display device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910743729.0A CN110609641B (en) | 2019-08-13 | 2019-08-13 | Touch pen, display panel, touch display device and method |
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| CN110609641A true CN110609641A (en) | 2019-12-24 |
| CN110609641B CN110609641B (en) | 2023-05-16 |
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| CN201910743729.0A Active CN110609641B (en) | 2019-08-13 | 2019-08-13 | Touch pen, display panel, touch display device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112130680A (en) * | 2020-09-03 | 2020-12-25 | 昆山龙腾光电股份有限公司 | Photoelectric device, touch pen, touch display system and touch display method |
| CN113065440A (en) * | 2021-03-25 | 2021-07-02 | 惠州市华星光电技术有限公司 | Display panel and display device |
| CN113223432A (en) * | 2020-01-21 | 2021-08-06 | 京东方科技集团股份有限公司 | Display panel and display device |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN110609641B (en) | 2023-05-16 |
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