CN111831197A - Positioning input system and method - Google Patents
Positioning input system and method Download PDFInfo
- Publication number
- CN111831197A CN111831197A CN201910312798.6A CN201910312798A CN111831197A CN 111831197 A CN111831197 A CN 111831197A CN 201910312798 A CN201910312798 A CN 201910312798A CN 111831197 A CN111831197 A CN 111831197A
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- touch
- driver
- active pen
- touch screen
- uplink signal
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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
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
- G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures
-
- 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
Abstract
A positioning input system comprises a touch screen, an active pen and a driver. The driver transmits an uplink signal to the active pen via the touch screen during a current touch, the uplink signal including timing information to inform the active pen of a timing of a next touch, the active pen transmitting a downlink signal to the driver via the touch screen during a next touch. In another embodiment, the driver transmits an uplink signal to the active pen via the touch screen during the current touch period of the current frame, the transmission time of the uplink signal being different from the transmission time of the corresponding touch period of the previous frame.
Description
Technical Field
The present invention relates to a touch screen, and more particularly, to a positioning input system and method for overcoming the burn-in problem.
Background
Touch screens are single input/output devices formed by combining touch technology and display technology, and are commonly used in electronic devices, such as smart phones or tablet computers. The touch screen allows a user to directly interact with the displayed content.
Touch screens typically include a display driver for performing display operations; and a touch driver for performing touch work. A touch with display driver integration (TDDI) is a technology that integrates a touch driver and a display driver into a single chip, so as to simplify the manufacturing, reduce the cost, and improve the reliability.
A stylus, particularly an active pen, may be used to interact or communicate with the touch screen. The active pen is an input device, which includes electronic components to allow a user to write directly on the surface of the touch screen. The active stylus generates a wireless signal that can be received, digitized, and transmitted to a controller (or driver) for providing position data, pressure, and other functions of the stylus.
Due to the physical properties of touch screens (e.g., amorphous silicon touch screens), touch screens with integrated touch display drivers can suffer from burn-in problems. The burn-in problem can cause permanent damage to the touch screen.
Therefore, a novel mechanism is needed to overcome the burn-in problem and improve the reliability and lifetime of the touch screen.
Disclosure of Invention
In view of the foregoing, an objective of the embodiments of the present invention is to provide a positioning input system and method for overcoming the burn-in problem, thereby improving the reliability and lifetime of a touch screen of the positioning input system.
According to one embodiment of the present invention, a pointing input system includes a touch screen, an active pen, and a driver. The driver transmits an uplink signal to the active pen via the touch screen during a current touch. The uplink signal includes timing information to inform the active pen of the timing of the next touch session, during which the active pen transmits the downlink signal to the driver via the touch screen.
According to another embodiment of the present invention, the driver transmits an uplink signal to the active pen via the touch screen during the current touch period of the current frame, the transmission time of the uplink signal being different from the transmission time of the corresponding touch period of the previous frame.
Drawings
FIG. 1 is a schematic diagram of a positioning input system according to an embodiment of the invention.
FIG. 2 is a timing diagram illustrating signals associated with the positioning input system of FIG. 1 in a normal mode.
FIG. 3A is a flowchart illustrating a positioning input method according to a first embodiment of the present invention, which can overcome the burn-in problem.
FIG. 3B illustrates a timing diagram of signals associated with the positioning input system of FIG. 1 according to the positioning input method of FIG. 3A.
FIG. 4A is a flowchart illustrating a positioning input method according to a second embodiment of the present invention, which can overcome the burn-in problem.
FIG. 4B illustrates a timing diagram of signals associated with the positioning input system of FIG. 1 according to the positioning input method of FIG. 4A.
[ description of reference ]
100 positioning input system
11 touch control screen
12 touch display integrated driver
13 active pen
300 positioning input method
31 driver synchronization with active pen
32 provide an uplink signal to inform the active pen of the timing of the next touch event
33 active pen transmitting downlink signals with different timing
400 positioning input method
41 driver transmits uplink signal with different timing
42 driver synchronized to active pen
43 active pen transmits downlink signals with different timing
DE display Enable Signal
TE touch control enabling signal
US uplink signal
DS downlink signal
d1 delay time
d2 delay time
t1, t2, t3, t4, t1 ', t 2', t3 'and t 4' times
Detailed Description
FIG. 1 is a schematic diagram of a positioning input system 100 according to an embodiment of the invention. In the present embodiment, the positioning input system 100 may include a touch screen 11, such as an amorphous silicon (a-Si) touch screen. The positioning input system 100 of the present embodiment may include a touch with display driver integration (TDDI) 12, which integrates the touch driver and the display driver into a single chip. The touch display integration driver 12 may send a display enable signal DE to enable the touch screen 11 to perform a display operation, and the touch display integration driver 12 may also send a touch enable signal TE to enable the touch screen 11 to perform a touch operation. Although the touch display integrated driver 12 is illustrated in the present embodiment, a separate touch driver and display driver may be used in the present embodiment.
The pointing input system 100 may include an active stylus 13 for communicating with the touch screen 11 and the touch display integration driver 12. The active pen 13 may be in bidirectional communication with the touch display integrated driver 12. The touch display integrated driver 12 may transmit an uplink (uplink) signal US to the active pen 13 via the touch screen 11. The active pen 13 transmits a downlink (downlink) signal DS to the touch display integration driver 12 via the touch screen 11.
FIG. 2 is a timing diagram illustrating signals associated with the positioning input system 100 of FIG. 1 in a normal mode. During the touch time period t 1-t 2 (when the touch enable signal TE is active), the integrated touch display driver 12 transmits the uplink signal US to the active pen 13 for synchronization. Next, during the next touch interval t 3-t 4, the active pen 13 transmits the downlink signal DS to the integrated touch display driver 12 for communication. It is noted that, in the normal mode, the transmission timing of the uplink signal US and the downlink signal DS is fixed in all frames (frames). Therefore, the touch screen 11 causes burn-in problem.
FIG. 3A is a flowchart of a positioning input method 300 according to a first embodiment of the present invention, which can overcome the burn-in problem. The positioning input method 300 of FIG. 3A may be applied to the positioning input system 100 of FIG. 1. FIG. 3B illustrates a timing diagram of signals associated with the positioning input system 100 of FIG. 1 according to the positioning input method 300 of FIG. 3A.
In step 31, during the touch period t 1-t 2 (when the touch enable signal TE is active), the integrated touch display driver 12 transmits the uplink signal US to the active pen 13 for synchronization. According to one feature of this embodiment, at step 32, the uplink signal US provided by the touch display integrated driver 12 may include timing information for informing the active pen 13 of the timing of the next touch period (i.e., the time occurring during the next touch period). As illustrated in FIG. 3B, in the current frame N, the uplink signal US provided by the touch display integrated driver 12 includes timing information for notifying the active pen 13 that the next touch period will occur at time t 3' (or row index 195) that is different (e.g., later) than the corresponding time t3 (or row index 180) of the previous frame N-1.
Next, in step 33, during the next touch period t 3't 4', the active pen 13 transmits the downlink signal DS to the touch display integrated driver 12 for communication according to the timing information provided by the uplink signal US. Since the timing of the next touch periods t3 '-t 4' of the current frame N has changed or shifted compared to the previous frame N-1, the transmission timing (e.g., the delay time d1) of the downlink signal DS is also different compared to the previous frame N-1. Therefore, the touch periods of the frames do not occur at the same time, so that the burn-in problem can be overcome, and the reliability of the touch screen 11 can be improved.
FIG. 4A is a flowchart of a positioning input method 400 according to a second embodiment of the present invention, which can overcome the burn-in problem. The positioning input method 400 of FIG. 4A may be applied to the positioning input system 100 of FIG. 1. FIG. 4B illustrates a timing diagram of signals associated with the positioning input system 100 of FIG. 1 according to the positioning input method 400 of FIG. 4A.
In step 41, during the touch periods t1 'to t 2' (when the touch enable signal TE is active), the integrated touch display driver 12 transmits the uplink signal US to the active pen 13 via the touch screen 11. According to one feature of the present embodiment, the touch display integrated driver 12 changes (e.g., delays) the timing of the touch periods t1 'to t 2' in the current frame N, compared to the corresponding touch periods t1 to t2 in the previous frame N-1. As illustrated in fig. 4B, the uplink signal US (of the current frame N) has a delay time d2 compared to the previous frame N-1. The delay time d2 for each frame can be randomly generated or preset. Next, in step 42, the touch display integrated driver 12 synchronizes with the active pen 13 according to the uplink signal US.
Next, in step 43, during the next touch period t3 'to t 4', the active pen 13 transmits the downlink signal DS to the touch display integrated driver 12 for communication. The transmission of the downlink signal DS therefore has a different timing (e.g., delay time d2) compared to the previous frame N-1, since the previous touch period t 1't 2' and the next touch period t 3't 4' of the current frame N have changed or moved (e.g., delayed). In other words, compared to the previous frame N-1, the uplink signal US of the previous touch periods t1 'to t 2' of the current frame N has the delay time d2, which is the same as the delay time d2 of the downlink signal DS of the next touch periods t3 'to t 4' of the current frame N. Therefore, the touch periods of the frames do not occur at the same time, so that the burn-in problem can be overcome, and the reliability of the touch screen 11 can be improved.
Generally speaking, according to the first embodiment (fig. 3A and 3B) and the second embodiment (fig. 4A and 4B), the integrated touch display driver 12 can change the timing of the touch period of each frame by notifying the active pen 13 (as shown in the first embodiment) or not notifying the active pen 13 (as shown in the second embodiment). Therefore, the active pen 13 transmits the downlink signal DS with different timing in each frame. Therefore, the invention can overcome the branding problem of the touch screen 11 and improve the reliability of the touch screen.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the claims of the present invention; it is intended that all such equivalent changes and modifications be included within the spirit of the disclosure, which is encompassed by the following claims.
Claims (17)
1. A positional input system, comprising:
a touch screen;
the active pen is communicated with the touch screen; and
a driver for transmitting an uplink signal to the active pen via the touch screen during a current touch, the uplink signal including timing information for informing the active pen of a timing of a next touch, the active pen transmitting a downlink signal to the driver via the touch screen during the next touch.
2. The pointing input system of claim 1, wherein the driver comprises a touch display integration driver.
3. The pointing input system of claim 1, wherein the touch screen comprises an amorphous silicon touch screen.
4. The pointing input system of claim 1, wherein timing information for a current frame is different from timing information for a previous frame.
5. The pointing input system of claim 1, wherein the time for the driver to transmit the uplink signal in a current frame and a previous frame is the same, and the time for the active pen to transmit the downlink signal in the current frame and the previous frame is different.
6. A positional input method, comprising:
during the current touch, the driver transmits an uplink signal to the active pen through the touch screen;
the uplink signal provides timing information to inform the active pen of the timing of the next touch period; and
according to the timing information, the active pen transmits a downlink signal to the driver via the touch screen.
7. The method of claim 6, wherein the driver comprises a touch display integration driver.
8. The method of claim 6, wherein the timing information of the current frame is different from the timing information of the previous frame.
9. The method of claim 6, wherein the time for the driver to transmit the uplink signal in a current frame and a previous frame is the same, and the time for the active pen to transmit the downlink signal in the current frame and the previous frame is different.
10. A positional input system, comprising:
a touch screen;
the active pen is communicated with the touch screen; and
and the driver transmits an uplink signal to the active pen through the touch screen in the current touch period of the current frame, wherein the transmission time of the uplink signal is different from that of the corresponding touch period of the previous frame.
11. The pointing input system of claim 10, wherein the driver comprises a touch display integration driver.
12. The pointing input system of claim 10, wherein the touch screen comprises an amorphous silicon touch screen.
13. The pointing input system of claim 10, wherein the active pen transmits downlink signals at different times in a current frame and a previous frame.
14. The system of claim 10, wherein the time for the uplink signal to move in a current frame compared to a previous frame is the same as the time for the downlink signal to move in a current frame compared to a previous frame.
15. A positional input method, comprising:
in the current touch control period of the current frame, the driver transmits an uplink signal to the active pen through the touch control screen, wherein the transmission time of the uplink signal is different from that of the corresponding touch control period of the previous frame; and
the active pen transmits a downlink signal to the driver through the touch screen, and the transmission time of the downlink signal in the current frame is different from that in the previous frame.
16. The method of claim 15, wherein the driver comprises a touch display integration driver.
17. The method of claim 15, wherein the time for the uplink signal to move in the current frame compared to the previous frame is the same as the time for the downlink signal to move in the current frame compared to the previous frame.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910312798.6A CN111831197B (en) | 2019-04-18 | 2019-04-18 | Positioning input system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910312798.6A CN111831197B (en) | 2019-04-18 | 2019-04-18 | Positioning input system and method |
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| CN111831197A true CN111831197A (en) | 2020-10-27 |
| CN111831197B CN111831197B (en) | 2021-10-29 |
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| CN201910312798.6A Active CN111831197B (en) | 2019-04-18 | 2019-04-18 | Positioning input system and method |
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| CN111831197B (en) | 2021-10-29 |
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