CN111045555B - Active pen and touch display system using same - Google Patents
Active pen and touch display system using same Download PDFInfo
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- CN111045555B CN111045555B CN201911256720.3A CN201911256720A CN111045555B CN 111045555 B CN111045555 B CN 111045555B CN 201911256720 A CN201911256720 A CN 201911256720A CN 111045555 B CN111045555 B CN 111045555B
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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
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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
- G06F3/033—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
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
Abstract
The invention discloses an active pen and a touch display system using the same. The first emitting electrode is arranged on the surface of the body. The second emitting electrode is arranged at the contact end and selects one to operate with the first emitting electrode. The sensing electrode is arranged on the surface of the body and has a capacitance value. The first control unit is respectively coupled with the first emitting electrode, the second emitting electrode and the induction electrode. The first control unit sets one of the first transmitting electrode and the second transmitting electrode to an enabled state according to a change in capacitance value, and simultaneously sets the other of the first transmitting electrode and the second transmitting electrode to a floating state. The present invention can integrate different operation modes.
Description
Technical Field
The invention relates to a touch device; specifically, the present invention relates to an active pen and a touch display system.
Background
Active pens have been widely used in conjunction with touch-sensitive display devices to provide input effects; the operation mode can be divided into two types, one is that the glass surface attached to the display device moves to generate handwriting, or is called 2D touch control; the other is to move a distance away from the glass surface of the display device to generate handwriting, or 3D touch.
However, when the user wants to perform the above two different operations, the user needs to purchase two different active pens, which is inconvenient and not economical.
Although the prior art proposes an active pen combining different operation modes, the operation mode is switched according to the pen holding strength, but the pen holding strength of each person is different, so that the display device is easy to misjudge when the operation mode is switched, and further improvement is needed.
Disclosure of Invention
An objective of the present invention is to provide an active pen and a touch display system, which can integrate different operation modes.
In order to achieve the above object, the present invention provides an active pen, which includes a contact end and a body connected to the contact end, and further includes a first transmitting electrode, a second transmitting electrode, at least one sensing electrode, and a first control unit. The first emitting electrode is arranged on the surface of the body. The second emitting electrode is arranged at the contact end and selects one to operate with the first emitting electrode. The sensing electrode is arranged on the surface of the body and has a capacitance value. The first control unit is respectively coupled with the first emitting electrode, the second emitting electrode and the induction electrode. The first control unit sets one of the first and second transmitting electrodes to an enabled state according to a change in capacitance value, and simultaneously sets the other of the first and second transmitting electrodes to a floating state.
When the first transmitting electrode is set to be in an enabling state, the active pen enters a first operation mode and the first transmitting electrode generates a first signal for the first operation mode, when the second transmitting electrode is set to be in the enabling state, the active pen enters a second operation mode and the second transmitting electrode generates a second signal for the second operation mode, and the frequency band of the first signal is not overlapped with the frequency band of the second signal.
The surface of the body is provided with a first holding part and a second holding part, the first emitting electrode and the induction electrode are arranged on the second holding part, and the second holding part is closer to the contact end than the first holding part.
When the sensing electrode is touched, the capacitance value rises and the active pen enters the second operation mode.
When the first receiving electrode and the first transmitting electrode are touched, the capacitance value is reduced and the active pen enters the second operation mode.
The sensing electrode comprises at least one first receiving electrode and at least one third transmitting electrode, mutual capacitance sensing is formed between the first receiving electrode and the third transmitting electrode, when the first receiving electrode and the third transmitting electrode are touched, the capacitance value is reduced, and the active pen enters the second operation mode.
Wherein, the first emitting electrode has an edge on the side close to the second emitting electrode, and the distance between the edge and the second emitting electrode is more than 2cm.
To achieve the above object, the present invention provides a touch display system, which includes the active pen and a touch display module. The touch display module comprises a display panel and a touch panel arranged on the display panel. The touch panel comprises a first operation electrode, a second operation electrode and a second control unit. The second control unit is coupled to the first operation electrode and the second operation electrode. When the first emitting electrode is in an enabling state, the second control unit judges the position of the active pen according to the electric field state of the first operating electrode; when the second emitting electrode is in an enabling state, the second control unit judges the position of the active pen according to the capacitance change between the second operating electrode and the second emitting electrode. Therefore, the active pen can be switched to use in different operation modes.
When an electric field is established between the transmitting electrode and the receiving electrode, the second control unit detects that the receiving electrode of the first operating electrode generates an electric field variation, and the second control unit judges the position of the active pen according to the electric field variation.
When the transmitting electrode is in a floating state, and the second control unit detects that the receiving electrode of the first operating electrode is converted from a non-applied electric field state to an applied electric field state, the second control unit judges the position of the active pen according to the applied electric field state.
The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.
Drawings
FIG. 1 is a schematic diagram of an embodiment of an active pen according to the present invention.
FIG. 2 is a block diagram of an active pen.
FIG. 3A is a diagram illustrating the active pen in a first operating mode.
FIG. 3B is a diagram illustrating the active pen in a second mode of operation.
Fig. 4A and 4B are schematic diagrams of different sensing embodiments in a second operation mode.
FIG. 5 is a schematic diagram of another embodiment of an active pen.
FIGS. 6A and 6B are schematic diagrams of different embodiments of an active pen using mutual capacitance sensing.
Fig. 7 is a schematic diagram of an embodiment of a touch display system.
Fig. 8 and 9 are diagrams illustrating different embodiments of determining the position of an active pen by a touch display module.
Wherein, the reference numbers:
1: touch display system
10: active pen
12: contact terminal
14: body
20: touch display module
110: a first emitter electrode
112: edge of a container
120: a second emitter electrode
130: induction electrode
130R, 130R1: a first receiving electrode
130R2: a first receiving electrode
130T: third emitter electrode
140: a first control unit
141: a first holding part
142: second holding part
210: touch panel
220: display panel
230: a first operation electrode
230R: receiving electrode
230T: emitter electrode
240: a second operation electrode
250: a second control unit
S1: first signal
S2: second signal
d: distance between two adjacent plates
Detailed Description
It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present.
As used herein, "about", "approximately", or "substantially" includes the stated value and the average value within an acceptable range of deviation of the specified value as determined by one of ordinary skill in the art, taking into account the measurement in question and the specified amount of error associated with the measurement (i.e., the limitations of the measurement system). For example, "about" can mean within one or more standard deviations of the stated value, or within ± 30%, ± 20%, ± 10%, ± 5%.
FIG. 1 is a schematic diagram of an embodiment of an active pen 10 of the present invention. As shown in fig. 1, the active pen 10 includes a contact end 12 and a body 14 connected to the contact end 12, and includes a first emitting electrode 110, a second emitting electrode 120, an induction electrode 130 and a first control unit. The first emitter electrode 110 is disposed on the surface of the body 14, and the second emitter electrode 120 is disposed on the contact end 12. The first transmitting electrode 110 and the second transmitting electrode 120 are alternatively operated. The sensing electrode 130 is disposed on the surface of the body 14 and can detect capacitance variation, for example, it can be ring-shaped around the body 14.
The first control unit is disposed inside the active pen 10, for example, in a space within the body 14. Please refer to fig. 2. Fig. 2 is a block diagram of the active pen 10. As shown in fig. 2, the first control unit 140 is coupled to the first transmitting electrode 110, the second transmitting electrode 120 and the sensing electrode 130, respectively. The first control unit 140 is, for example, a microcontroller, and sets one of the first transmitting electrode 110 and the second transmitting electrode 120 to an enabled state according to a change in capacitance of the sensing electrode 130, and sets the other of the first transmitting electrode and the second transmitting electrode to a floating state.
As shown in fig. 2, when the first transmitting electrode 110 is set to the enabled state, the active pen 10 enters the first operation mode and the first transmitting electrode 110 generates the first signal S1 for the first operation mode. When the second transmitting electrode 120 is set to the enabled state, the active pen 10 enters the second operation mode and the second transmitting electrode 120 generates the second signal S2 for the second operation mode.
For example, the first operation mode is a hover operation, and the position of the active pen 10 can be calculated by sensing a signal generated by the first transmitting electrode 110 through the touch panel; the second operation mode is a touch operation, and the touch position of the active pen 10 can be calculated by the change of the capacitance measured by the touch sensing electrode in the touch panel.
Preferably, the frequency band of the first signal S1 and the frequency band of the second signal S2 do not overlap, thereby avoiding interference when receiving signals.
Referring back to fig. 1, taking the active pen 10 of fig. 1 as an example, the surface of the main body 14 has a first holding portion 141 and a second holding portion 142. The first emitting electrode 110 and the sensing electrode 130 are disposed on the second holding portion 142; in other words, the first holding portion 141 can be regarded as a partial section of the body 14 without the first emitting electrode 110 or the sensing electrode 130.
In the example shown in fig. 1, the second holding portion 142 is closer to the contact end 12 than the first holding portion 141. With this design, when the first emitting electrode 110 is used for the first operation mode, the first emitting electrode 110 can be closer to the display device, and the required operation energy is lower.
However, it should be noted that the position relationship between the first holding portion 141 and the second holding portion 142 is not limited in the above manner, and in other embodiments, the first holding portion 141 may be located between the contact end 12 and the second holding portion 142.
It should be noted that the first holding portion 141 is made of a poor conductor or an insulator, and the second holding portion 142 is made of a poor conductor or an insulator except for the first emitter electrode 110 and the induction electrode 130.
It should be added that, since the frequency bands of the signals provided by the first transmitting electrode 110 and the second transmitting electrode 120 are different, the first transmitting electrode 110 and the second transmitting electrode 120 may be slightly far away from each other. For example, as shown in fig. 1, a side of the first emitter electrode 110 close to the second emitter electrode 120 has an edge 112, and a distance d is left between the edge 112 and the second emitter electrode 120. In one embodiment, the distance d is greater than 2cm.
Fig. 3A is a schematic diagram of the active pen 10 in a first operation mode. As shown in fig. 3A, the active pen 10 enters the first operation mode and moves over the touch display module 20 in an interval. Referring to fig. 1 and 3A, when the first holding portion 141 is touched but the sensing electrode 130 is not touched, the first transmitting electrode 110 is set to the enabled state and the second transmitting electrode 120 is set to the floating state.
Fig. 3B is a schematic diagram of the active pen 10 in a second operation mode. As shown in fig. 3B, the active pen 10 enters the second operation mode and moves on the surface of the touch display module 20. Referring to fig. 1 and 3B, when the second holding portion 142 is touched and the sensing electrode 130 is touched, the first transmitting electrode 110 is set to a floating state and the second transmitting electrode 120 is set to an enabled state.
In one embodiment, the sensing electrode 130 forms a self-capacitance sensing, and when the sensing electrode 130 is touched, the capacitance value is correspondingly increased; at this time, the first control unit controls the active pen 10 to enter the second operation mode according to the increase of the capacitance. In short, when the sensing electrode 130 is touched, the first control unit sets the active pen 10 to enter the second operation mode.
FIG. 4A is a schematic diagram illustrating capacitance variation in self-capacitance sensing in the second operation mode. As shown in fig. 4A, the horizontal axis represents time, the vertical axis represents capacitance, and the symbol CS represents capacitance sensed by self-capacitance.
When the sensing electrode 130 is touched, the capacitance of the sensing electrode 130 increases. For example, when the capacitance of the sensing electrode 130 exceeds the predetermined threshold TH1, the first control unit sets the active pen 10 to enter the second operation mode.
On the contrary, when the sensing electrode 130 is not touched, the capacitance of the sensing electrode 130 is substantially unchanged, or decreases from exceeding the preset threshold TH1 to being below the preset threshold TH1, the first control unit sets the active pen 10 to maintain or enter the first operation mode.
Therefore, the first control unit can be used for judging the touched state of the body surface according to the capacitance value change of the sensing electrode 130 so as to generate a setting result for operating in the first operation mode or the second operation mode.
In another embodiment, the sensing electrodes may be capacitive sensing. Taking fig. 3B as an example, the sensing electrode is a first receiving electrode 130R, and the first receiving electrode 130R and the first transmitting electrode 110 form mutual capacitance sensing. When the first receiving electrode 130R and the first transmitting electrode 110 on the second grip portion are touched, the capacitance value decreases accordingly and the active pen 10 enters the second operation mode. In short, when the first receiving electrode 130R and the first transmitting electrode 110 are touched, the first control unit sets the active pen 10 to enter the second operation mode.
FIG. 4B is a schematic diagram illustrating capacitance variation sensed by mutual capacitance in the second operation mode. As shown in fig. 4B, the horizontal axis represents time, the vertical axis represents capacitance, and the symbol CM represents capacitance sensed by mutual capacitance.
When the first receiving electrode 130R and the first transmitting electrode 110 are touched, the capacitance of the sensing electrode decreases. For example, when the capacitance of the sensing electrode exceeds the preset threshold TH2, the first control unit sets the active pen 10 to enter the second operation mode.
On the contrary, when the first receiving electrode 130R and the first transmitting electrode 110 are not touched, the capacitance of the sensing electrode is substantially unchanged, or decreases from exceeding the preset threshold TH2 to falling below the preset threshold TH2, the first control unit sets the active pen 10 to enter the first operation mode.
Fig. 5 is a schematic diagram of another embodiment of the active pen 10. As shown in FIG. 5, the active pen 10 may include a plurality of sensing electrodes 130. Each sensing electrode 130 forms a self-capacitance sensing, when one of the sensing electrodes 130 is touched, the first control unit detects that the capacitance value is increased and the active pen 10 enters the second operation mode. In other words, by providing the plurality of sensing electrodes 130, the situation that the sensing electrodes 130 are not detected to be touched when the second operation mode is actually performed is avoided, and the determination accuracy of the first control unit during the self-capacitance sensing can be improved.
In other embodiments, the range of the sensing electrode 130 on the main body is extended (for example, a larger sensing electrode covers the range occupied by the three sensing electrodes in fig. 5), so as to ensure that the sensing electrode 130 is detected when being touched, and improve the accuracy of the determination of the first control unit.
Fig. 6A and 6B are schematic diagrams of different embodiments of the active pen 10 including a plurality of sensing electrodes 130. Both FIG. 6A and FIG. 6B employ mutually capacitive sensing.
As shown in fig. 6A, the active pen 10 may include a plurality of sensing electrodes 130, wherein the sensing electrodes 130 include a first receiving electrode 130R and a third transmitting electrode 130T. The first receiving electrode 130R and the third transmitting electrode 130T form mutual capacitance sensing. When the first receiving electrode 130R and the third transmitting electrode 130T are touched, the capacitance value decreases and the active pen 10 enters the second operation mode. In other words, when the first receiving electrode 130R and the third transmitting electrode 130T are touched, the first control unit sets the active pen 10 to enter the second operation mode.
In another embodiment, the range of the first receiving electrode 130R and the third transmitting electrode 130T on the body is extended to improve the accuracy of the first control unit.
As shown in fig. 6B, the sensing electrode 130 includes two first receiving electrodes ( 130R 1, 130R 2) and one third transmitting electrode 130T. The first receiving electrodes ( 130R 1, 130R 2) and the third transmitting electrode 130T form mutual capacitance sensing. When one of the two first receiving electrodes ( 130R 1, 130R 2) is touched and the third transmitting electrode 130T is touched, the capacitance decreases and the active pen 10 enters the second operation mode. In other words, by providing the plurality of first receiving electrodes, the accuracy of the first control unit in mutual capacitance sensing can be improved.
In other embodiments, the number of the third transmitting electrodes 130T may also be increased to improve the judgment accuracy of the first control unit.
Further, with mutual capacitance sensing as in fig. 6A or 6B, the first transmitting electrode 110 is only used for the first mode of operation, it being understood that the frequency at which the first transmitting electrode 110 generates signals is set to be different from the frequency received by the first receiving electrodes ( 130R 1, 130R 2).
Fig. 7 is a schematic diagram of an embodiment of the touch display system 1. As shown in fig. 7, the touch display system 1 includes an active pen 10 and a touch display module 20. Referring to fig. 8, the touch display module 20 includes a display panel 220 and a touch panel 210 disposed on the display panel 220.
As shown in fig. 7 and 8, the touch panel 210 includes a first operation electrode 230, a second operation electrode 240 and a second control unit 250. The second control unit 250 is coupled to the first operation electrode 230 and the second operation electrode 240. The second control unit 250 is, for example, a touch integrated chip, and can detect changes of the first operation electrode 230 and the second operation electrode 240 to determine the position of the active pen 10. For example, the first operating electrode 230 is used to generate an electric field with the first emitting electrode 110, and the electric field variation is sensed by the second control unit 250; the second operation electrode 240 forms a sensing line in the touch panel 210, and is used to generate a capacitance with the second transmitting electrode 120 when the active pen 10 contacts the touch panel 210, and the capacitance change is sensed by the second control unit 250.
In other words, when the first transmitting electrode 110 of the active pen 10 is in the enabled state, the second control unit 250 determines the position of the active pen 10 according to the electric field state of the first operating electrode 230, and when the second transmitting electrode 120 is in the enabled state, the second control unit 250 determines the position of the active pen 10 according to the capacitance change between the second operating electrode 240 and the second transmitting electrode 120.
Fig. 8 and 9 are diagrams illustrating different embodiments of the touch display module 20 determining the position of the active pen 10 when the active pen 10 is in the first operation mode.
As shown in fig. 8, the first operation electrode 230 includes a transmitting electrode 230T and a receiving electrode 230R. When the electric field is established between the transmitting electrode 230T and the receiving electrode 230R (e.g., during operation of the touch display module 20), when the active pen 10 approaches the touch display module 20, the second control unit 250 detects a variation of the electric field generated on the receiving electrode 230R, and therefore the second control unit 250 determines the position of the active pen 10 according to the variation of the electric field.
As shown in fig. 9, the first operation electrode 230 includes a transmitting electrode 230T and a receiving electrode 230R. When the transmitting electrode 230T is in a floating state (e.g., the touch display module 20 enters a sleep mode), no electric field is established between the transmitting electrode 230T and the receiving electrode 230R, and when the active pen 10 approaches the touch display module 20, the second control unit 250 detects that the receiving electrode 230R is switched from a state without an applied electric field to a state with an applied electric field, so that the second control unit 250 determines the position of the active pen 10 according to the state with the applied electric field.
With the design shown in fig. 8 and 9, the touch display module 20 can determine the position of the active pen in different working states.
The present invention has been described in relation to the above embodiments, which are only exemplary of the implementation of the present invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. On the contrary, the spirit and scope of the appended claims are to encompass within their scope all modifications and equivalents.
The present invention is capable of other embodiments, and various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. An active pen, comprising a contact end and a body connected to the contact end, the active pen comprising:
a first emitter electrode disposed on the surface of the body;
a second emitter electrode, which is arranged at the contact end and selects one of the first emitter electrode and the second emitter electrode to operate;
at least one induction electrode arranged on the surface of the body and provided with a capacitance value; and
the first control unit is coupled to the first transmitting electrode, the second transmitting electrode and the sensing electrode respectively, and sets one of the first transmitting electrode and the second transmitting electrode to be in an enabling state according to the change of the capacitance value and sets the other one of the first transmitting electrode and the second transmitting electrode to be in a floating state.
2. The active pen of claim 1, wherein when the first transmitting electrode is set to the enabled state, the active pen enters a first operation mode and the first transmitting electrode generates a first signal for the first operation mode, and when the second transmitting electrode is set to the enabled state, the active pen enters a second operation mode and the second transmitting electrode generates a second signal for the second operation mode, and the frequency band of the first signal is not overlapped with the frequency band of the second signal.
3. The active pen of claim 2, wherein the body has a first holding portion and a second holding portion, the first emitting electrode and the sensing electrode are disposed on the second holding portion, and the second holding portion is closer to the contact end than the first holding portion.
4. The active pen according to claim 3, wherein the sensing electrode forms a self-contained sense, when the sensing electrode is touched, the capacitance value rises and the active pen enters the second operation mode.
5. The active pen according to claim 3, wherein the sensing electrode comprises at least a first receiving electrode, the first receiving electrode and the first transmitting electrode form a mutual capacitance sensing, when the first receiving electrode and the first transmitting electrode are touched, the capacitance value decreases and the active pen enters the second operation mode.
6. The active pen according to claim 3, wherein the sensing electrode comprises at least a first receiving electrode and at least a third transmitting electrode, the first receiving electrode and the third transmitting electrode form mutual capacitance sensing, when the first receiving electrode and the third transmitting electrode are touched, the capacitance value decreases and the active pen enters the second operation mode.
7. The active pen of claim 1, wherein the side of the first emitter electrode adjacent to the second emitter electrode has an edge, and the distance between the edge and the second emitter electrode is greater than 2cm.
8. A touch display system, comprising:
the active pen of any one of claims 1 to 7; and
a touch display module comprising a display panel and a touch panel disposed on the display panel, the touch panel comprising:
a first operating electrode;
a second operation electrode; and
a second control unit coupled to the first operation electrode and the second operation electrode;
when the first emitting electrode is in an enabled state, the second control unit judges the position of the active pen according to the electric field state of the first operating electrode; when the second emitting electrode is in an enabling state, the second control unit judges the position of the active pen according to the capacitance change between the second operating electrode and the second emitting electrode.
9. The touch display system of claim 8, wherein the first operation electrode comprises a transmitting electrode and a receiving electrode, and when an electric field is established between the transmitting electrode and the receiving electrode, and the second control unit detects an electric field variation generated by the receiving electrode of the first operation electrode, the second control unit determines the position of the active pen according to the electric field variation.
10. The touch display system of claim 8, wherein the first operation electrode comprises a transmitting electrode and a receiving electrode, and when the transmitting electrode is in a floating state and the second control unit detects that the receiving electrode of the first operation electrode is switched from a non-applied electric field state to an applied electric field state, the second control unit determines the position of the active pen according to the applied electric field state.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW108115879A TWI687861B (en) | 2019-05-08 | 2019-05-08 | Active stylus and the touch display system using the same |
| TW108115879 | 2019-05-08 |
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| Publication Number | Publication Date |
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| CN111045555A CN111045555A (en) | 2020-04-21 |
| CN111045555B true CN111045555B (en) | 2023-03-17 |
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| CN201911256720.3A Active CN111045555B (en) | 2019-05-08 | 2019-12-06 | Active pen and touch display system using same |
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| TW (1) | TWI687861B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022000447A1 (en) | 2020-07-03 | 2022-01-06 | Huawei Technologies Co., Ltd. | Stylus communicating with a device |
| US11747936B2 (en) | 2021-07-13 | 2023-09-05 | Novatek Microelectronics Corp. | Transmission system, processor, and transmission method |
| TWI826917B (en) * | 2021-07-13 | 2023-12-21 | 聯詠科技股份有限公司 | Transmission system, processor, and transmission method |
| CN114911364B (en) * | 2022-03-29 | 2023-06-13 | 荣耀终端有限公司 | Control method, touch pen and touch system |
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Also Published As
| Publication number | Publication date |
|---|---|
| TW202042045A (en) | 2020-11-16 |
| CN111045555A (en) | 2020-04-21 |
| TWI687861B (en) | 2020-03-11 |
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