TWI779579B - Event table circuit, touch display driver integrated chip and information processing device - Google Patents

Abstract

An event table circuit, coupled between a control unit and a touch detection circuit, which has: a storage unit storing at least one event table, the event table includes multiple pieces of data, and each piece of data includes a time value and an event command data; and a signal processing unit for reading each of the event command data when a count value of a timing unit is sequentially equal to each of the time values, and according to each of the event command data Sequentially send a control command signal to the touch detection circuit, so as to automatically determine the corresponding touch operation modes in a plurality of gap periods during a frame display period.

Description

Event table circuit, touch display driver integrated chip and information processing device

The present invention relates to the technical field of touch detection, especially an event table circuit, which is applied to a touch display chip, so that the touch display chip can be sequentially determined and placed in a frame display through the content stored in an event table The working mode of each touch detection operation in each gap period of the period.

Currently, many electronic devices are equipped with touch screens, wherein the touch screens must include touch panels and display panels. Moreover, with the advancement of integrated circuit design and manufacturing technology, touch and display integration (TDDI) chips are widely used to realize the control of touch panels and display panels in electronic devices.

The conventional touch display integrated chip (hereinafter referred to as "touch display chip") will have a fixed ratio (1:1 or 1:2) between the detection frame rate of the touch scanning signal and the display frame rate of the display driving signal. ). Moreover, in order to ensure the touch detection efficiency, a better way is to make the detection frame rate of the touch scanning signal twice the display frame rate; for example, the display frame rate of 60 Hz corresponds to the detection frame rate of 120 Hz. FIG. 1 shows a timing diagram of a control signal used in a conventional touch display chip. As shown in FIG. 1 , the control signal is transmitted to a touch detection circuit and a display driving circuit integrated in the touch display chip to trigger (control) the touch detection circuit to perform touch detection work and The display driving circuit is triggered to perform display driving work.

Simply put, in a fixed display period, the touch display chip will time-divisionally perform touch detection on the touch panel and display driving on the display panel according to the synchronization signal. Wherein, T1, T2 and T3 shown in FIG. 1 are working time intervals of touch detection (or called touch scanning), and D1 and D1 are working time intervals of display drivers.

It should be known that, in addition to using the user's finger to touch the touch panel to achieve operational control of the electronic device (such as: a smart phone), the user can also use a stylus to replace the finger to touch the touch panel to achieve control of the electronic device. operation control. Currently, stylus includes passive stylus and active stylus. When using an active stylus, the touch panel will send an uplink signal to the host Active stylus, and active stylus will send downlink (downlink) signal to the touch screen. Therefore, in order to enable the electronic device including the touch panel and the display panel to support the use of the active stylus, in the touch detection time interval, the touch display chip must further perform the touch operation of the finger and the active stylus in time division. The detection of the touch operation of the stylus, so as to realize the recognition and control of the finger and the active stylus.

Unfortunately, since the active stylus produced by different companies adopts different protocols and work timing requirements, electronic devices including touch panels and display panels are usually designed to only support a certain active stylus. The use of the type stylus leads to the loss of the application flexibility and functional scalability of the product.

It can be seen from the above description that there is an urgent need in the art for an event table circuit and a novel touch display chip including the event table circuit.

The main purpose of the present invention is to provide an event table circuit, which is used to be coupled between a control unit and a touch detection circuit, and includes a storage unit and a signal processing unit. Wherein, the storage unit stores at least one event table, and the event table includes N+1 time values and N+1 event command data respectively corresponding to the N+1 time values. The signal processing unit is coupled to a control signal transmitted by the control unit, and performs time counting according to the trigger of the control signal to obtain a count value increasing with time. During the counting process, the count value will be equal to each of the time values in sequence, and accordingly, the signal processing unit can sequentially read out the event command data corresponding to each of the time values, and then The event command data sends a control command signal to the touch detection circuit, so as to drive the touch detection circuit to perform a finger touch detection operation, a pen touch detection operation, a pen up signal transmission operation, or a null operation.

According to this design, the control unit can also perform event table configuration processing (or event table update processing) on the storage unit according to the transmission protocol content of different active stylus pens, so as to update the N+1 events included in the event table. The time values and the N+1 event command data are configured or updated correspondingly, so that the touch detection circuit can complete active touch pens of different brands and/or user fingers. The detection of touch operation greatly improves the application flexibility and function expansion of the touch detection chip or TDDI chip including the touch detection circuit.

To achieve the above object, the present invention proposes an embodiment of the event table circuit, including: a storage unit storing at least one event table, and the event table includes N+1 time values and N+1 N+1 event command data respectively corresponding to the time values, wherein N is an integer greater than or equal to 0; and a signal processing unit coupled to the storage unit and simultaneously coupled to a control transmitted by the control unit signal; wherein, within a display period, the signal processing unit performs a time counting operation according to the trigger of the control signal to obtain a count value that increases with time, and performs a read operation on the event table to read from N+1 The first time value is read out of the time values, and then the signal processing unit performs a time comparison process on the first time value and the count value, so that in the first time value In the case of being equal to the count value, read out the 1st said event command data corresponding to the 1st said time value from among the N+1 said event command data, and then send a message containing said 1st said event command data. A control command signal of event command data is sent to the touch detection circuit; wherein, within the display period, the signal processing unit continues to perform the read operation to read the i-th time value, i is between 2 positive integer to N+1, and the signal processing unit continues to perform the time comparison process, so that when the count value is equal to the i-th time value, correspondingly read the i-th said time value event command data, and then send a control command signal including the ith event command data to the touch detection circuit.

In one embodiment, the control command signal is used to trigger the touch detection circuit to perform a finger touch detection operation, a pen touch detection operation, a pen up signal transmission operation, or a null operation.

In one embodiment, the signal processing unit includes: a timing unit coupled to the control signal to implement the time counting operation; a comparison unit coupled to the timing unit to implement the time comparison processing; and A read unit, coupled to the timing unit and the storage unit, is used for performing a read operation on the storage unit.

In a feasible embodiment, the event table circuit, the control unit and the touch detection circuit are integrated into a touch display driver integrated chip.

In another feasible embodiment, the event table circuit, the control unit and the touch detection circuit are integrated into a touch chip.

In a feasible embodiment, the control unit can perform an event table update process on the storage unit according to a transmission protocol content of different active stylus pens, so as to update the N+1 items contained in the event table. The value of the time value and the data content of the N+1 event command data.

The present invention also discloses a touch display drive integrated chip, which includes: a control unit, a display drive circuit and a touch detection circuit; it is characterized in that the touch display drive integrated chip includes the above-mentioned present invention An event table circuit, the event table circuit is coupled between the control unit and the touch detection circuit.

Moreover, the present invention also discloses an information processing device, which has a touch panel, a display panel, and at least one touch display driver integrated chip, and the touch display driver integrated chip includes: a control unit, a display driver circuit and a touch detection circuit; characterized in that, the touch display driver integrated chip includes the event table circuit of the present invention as mentioned above, and the event table circuit is coupled between the control unit and the touch detection circuit.

In one embodiment, the information processing device is an electronic device selected from the group consisting of a smart phone, a smart watch, a smart bracelet, a tablet computer, a notebook computer, an all-in-one computer, and an access control device.

1: Display device

11: Touch display screen

12: Touch display driver integrated chip

120: Control unit

121: Touch detection circuit

1211: Finger touch detection operation

1212: Pen touch detection operation

1213: pen uplink signal transmission operation

2: Event table circuit

21: storage unit

211: Event table

22: Signal processing unit

221: timing unit

222: Comparison unit

223: read unit

FIG. 1 is a timing diagram of a control signal used by a conventional touch display chip; FIG. 2 is a block diagram of a display device with a touch display driver integrated chip of the present invention; FIG. 3 is included in FIG. 2 Shown is a block diagram of an event table circuit of the touch display driver integrated chip; and FIG. 4 is a working timing diagram generated according to a transmission protocol of an active stylus.

In order to enable your examiners to further understand the structure, features, purpose, and advantages of the present invention, drawings and detailed descriptions of preferred embodiments are hereby attached.

FIG. 2 is a block diagram of a display device with a touch display driver integrated chip of the present invention. As shown in FIG. 2 , the display device 1 mainly includes a touch display screen 11 and a touch display driver integrated chip 12 of the present invention. Electronic engineers who are familiar with the design and manufacture of TDDI chips should know that existing TDDI chips at least include a display driving circuit, a touch detection circuit and a controller unit. FIG. 3 is a block diagram of an event table circuit included in the touch display driver integrated chip shown in FIG. 2 . In particular, as shown in FIG. 3 , the present invention designs an event table circuit 2 and integrates the event table circuit into the touch display driver integrated chip 12 shown in FIG. 2 . In a feasible embodiment, the event table circuit 2 of the present invention can also be integrated into a touch detection chip including only a touch detection circuit and a controller unit. As shown in FIG. 3 , the event table circuit 2 of the present invention is coupled between a control unit 120 and a touch detection circuit 121 , and includes: a storage unit 21 and a signal processing unit 22 .

It is supplemented that, as shown in FIG. 3 , the touch detection circuit 121 includes three function execution modes: finger touch detection operation 1211 , pen touch detection operation 1212 and pen uplink signal transmission operation 1213 . After receiving a finger touch detection command, the touch detection circuit 121 performs finger touch detection on a touch panel of the touch display screen 11 to implement the finger touch detection operation 1211 . Moreover, after receiving a touch detection command, the touch detection circuit 121 performs pen touch detection on the touch panel to implement the pen touch detection operation 1212 . Moreover, after receiving an uplink signal sending command, the touch detection circuit 121 drives the touch panel to send an uplink signal to an active stylus.

According to the design of the present invention, the storage unit 21 stores at least one event table 211, and the event table 211 includes N+1 time values and N+1 event commands respectively corresponding to the N+1 time values data, where N is an integer greater than or equal to 0. For example, FIG. 3 shows that N+1 time values are respectively t0, t1, t2, . . . , tn, and N+1 event command data are respectively cmd0, cmd1, cmd2, . . . , cmdn. On the other hand, the signal processing unit 22 is coupled to the storage unit 21 and simultaneously coupled to a control signal transmitted by the control unit 120 .

On the other hand, the signal processing unit 22 is coupled to the storage unit 21 and simultaneously coupled to a control signal transmitted by the control unit 120 . As shown in FIG. 3 , the signal processing unit 22 includes: a timing unit 221 coupled to the control signal, a comparison unit 222 coupled to the timing unit 221 , and a timing unit 221 coupled to the storage unit 21 A reading unit 223 . It has been explained in advance that, according to the content of the transmission protocol of different active stylus pens, the control unit 120 can perform event table configuration processing (or event table update processing) on the storage unit 21, thereby configuring (or updating) the storage unit 21. The event table 211 includes N+1 values of the time values (t0˜tn) and data contents of the N+1 event command data (cmd0˜cmdn).

When the touch display driver integrated chip 12 including the event table circuit 2 of the present invention works normally, within a display period, the signal processing unit 22 uses its timing unit 221 to perform a time counting operation according to the trigger of the control signal to obtain A count value is increased with time, and its reading unit 223 performs a read operation on the event table 211 to read the first time value from among the N+1 time values (t0~tn) (ie, starting time value t0). Next, the signal processing unit 22 uses its comparison unit 222 to perform a time comparison process on the start time value t0 and the count value, so that when the start time value t0 is equal to the count value, it automatically Among the event table 211, read the first described event command data corresponding to the start time value t0, that is, the N+1 described event command data (cmd0˜cmdn) stored from the storage unit 21 ) to read out the event command data associated with the first one. Then, the signal processing unit 22 sends a control command signal including the first event command data to the touch detection circuit 121, thereby triggering (controlling) the touch detection circuit 121 to perform a specific operation, such as: finger touch Control detection operation, pen touch detection operation, pen up signal transmission operation, or no operation.

It should be understood that, within the display period, the signal processing unit 22 will continue to perform the time counting operation, the reading operation and the time comparison processing. In other words, the signal processing unit 22 continues to perform the time counting operation to continuously update the count value and the read operation to read the i-th time value, and the signal processing unit 22 continues to Executing the time comparison process, i is a positive integer ranging from 2 to N+1, so that when the count value is equal to the i-th time value, correspondingly read the i-th event command data, and then send a control command signal including the ith event command data to the touch detection circuit 121 . That is, when including this When the touch display driver integrated chip 12 of the inventive event table circuit 2 is working normally, the signal processing unit 22 will sequentially read N+1 event command data (cmd0~cmdn) as the time counting operation is performed. , so that at the corresponding time point, a control command signal is sent to the touch detection circuit 121 according to the event command data, and the touch detection circuit 121 is controlled to perform the finger touch detection operation 1211, the pen touch detection operation 1212, and the pen up signal The transfer operation 1213, or the empty operation, until the end of a display frame (that is, a display period).

FIG. 4 shows a working sequence diagram generated according to a transmission protocol of an active stylus. As shown in Figure 4, according to the content of the transmission protocol of different active stylus, the storage unit 21 can be configured through the control unit 120 (or event table update processing), so as to configure (or update) the The event table 211 includes N+1 values of the time values (t0˜tn) and data contents of the N+1 event command data (cmd0˜cmdn). In one embodiment, as shown in FIG. 4 , the touch display driver integrated chip 12 performs the pen up signal transmission operation and the display driving operation between the time value t0 and the time value t1, and between the time value t1 and the time value t2 The touch detection operation and the display driving operation are performed between them, wherein the touch detection operation may be a finger touch detection operation or a pen touch detection operation. Therefore, it can be understood that according to the pre-configured N+1 time values (t0~tn) and N+1 event command data (cmd0~cmdn), the triggers including the event table circuit 2 of the present invention The control display driver integrated chip 12 will perform the corresponding finger touch detection operation, pen touch detection operation, pen uplink signal transmission operation, idle operation, or display driving operation within the corresponding time interval. In addition, the transmission protocol of the active stylus can be Microsoft's MPP (Microsoft Pen Protocol) protocol, Wacom's AES (Active ElectroStatic) protocol, Huawei's stylus protocol HPP, or the USI proposed by the stylus association. protocol (Universal Stylus Initiative), etc.; and the word group format of the event command data can be (preamble segment+uplink command segment+check bit information segment) or (downlink information segment+pressure information segment) and other word group formats.

Thus, the above has completely and clearly described an event table circuit of the present invention; and, through the above, it can be known that the present invention has the following advantages:

(1) The present invention discloses an event table circuit, which is used to be coupled between a control unit and a touch detection circuit, and includes a storage unit and a signal processing unit. Wherein, the storage unit stores at least one event table, and the event table includes N+1 time values and N+1 time values The N+1 event command data corresponding to the value respectively. The signal processing unit is coupled to a control signal transmitted by the control unit, and performs time counting according to the trigger of the control signal to obtain a count value increasing with time. When the count value is equal to each of the time values, the signal processing unit will read out the event command data corresponding to the time value, and then send a control command signal to the touch detection circuit according to the event command data , so as to trigger the touch detection circuit to perform a finger touch detection operation, a pen touch detection operation, a pen uplink signal transmission operation, or a null operation.

(2) According to this design, the control unit can also perform event table configuration processing (or event table update processing) on the storage unit according to the transmission protocol content of different active stylus pens, so as to update the events contained in the event table. The N+1 time values and the N+1 event command data are configured or updated correspondingly, so that the touch detection circuit can complete the touch of active stylus of different brands and/or user's finger The operation detection greatly improves the application flexibility and function expansion of the touch detection chip or TDDI chip including the touch detection circuit.

(3) The present invention also discloses a touch display driver integrated chip, which includes: a control unit, a display driver circuit and a touch detection circuit; it is characterized in that the touch display driver integrated chip includes the aforementioned In the event table circuit of the present invention, the event table circuit is coupled between the control unit and the touch detection circuit.

(4) The present invention also provides an information processing device, which has a touch panel, a display panel, and at least one touch display driver integrated chip, and the touch display driver integrated chip includes: a control unit, a display driver circuit and a touch detection circuit; characterized in that, the touch display driver integrated chip includes the event table circuit of the present invention as mentioned above, and the event table circuit is coupled between the control unit and the touch detection circuit .

It must be emphasized that what is disclosed in the above-mentioned case is a preferred embodiment, and all partial changes or modifications derived from the technical ideas of this case and easily deduced by those familiar with the technology are all inseparable from the patent of this case. category of rights.

To sum up, regardless of the purpose, means and efficacy of this case, it shows that it is very different from the conventional technology, and its first invention is practical, and it does meet the patent requirements of the invention. I implore your review committee to understand it clearly and grant a patent as soon as possible. Society is for the Most Prayer.

120: Control unit

121: Touch detection circuit

1211: Finger touch detection operation

1212: Pen touch detection operation

1213: pen uplink signal transmission operation

2: Event table circuit

21: storage unit

211: Event table

22: Signal processing unit

221: timing unit

222: Comparison unit

223: read unit

Claims (11)

An event table circuit is coupled between a control unit and a touch detection circuit, and includes: a storage unit storing at least one event table, and the event table includes N+1 time values and N+ N+1 event command data respectively corresponding to one of the time values, wherein N is an integer greater than or equal to 0; and a signal processing unit coupled to the storage unit and simultaneously coupled to the data sent by the control unit a control signal; wherein, within a display period, the signal processing unit performs a time counting operation according to the trigger of the control signal to obtain a count value that increases with time, and performs a read operation on the event table to automatically The first time value is read out of the N+1 time values, and then the signal processing unit performs a time comparison process on the first time value and the count value, so that in the first time value When the time value is equal to the count value, the first event command data corresponding to the first time value is read from the N+1 event command data, and then a message containing the first A control command signal of the event command data is sent to the touch detection circuit; wherein, in the display period, the signal processing unit continues to perform the read operation to read the i-th time value, i is A positive integer ranging from 2 to N+1, and the signal processing unit continues to perform the time comparison process, so that when the count value is equal to the i-th time value, correspondingly read the i-th the event command data, and then send a control command signal including the ith event command data to the touch detection circuit. The event table circuit according to claim 1, wherein the control command signal is used to trigger the touch detection circuit to perform a finger touch detection operation, a pen touch detection operation, a pen up signal transmission operation, or a null operation. The event table circuit as described in claim 2, wherein the signal processing unit includes: a timing unit coupled to the control signal for realizing the time counting operation; a comparison unit coupled to the timing unit for to implement the time comparison process; and A read unit, coupled to the timing unit and the storage unit, is used for performing a read operation on the storage unit. The event table circuit according to claim 2, wherein, when performing the finger touch detection operation or the pen touch detection operation, the touch detection circuit performs finger touch detection or pen touch detection on a touch panel detection, and when performing the pen up signal transmission operation, the touch detection circuit drives the touch panel to send an up signal to an active stylus. The event table circuit according to claim 4, wherein the event table circuit, the control unit and the touch detection circuit are integrated into a touch display driver integrated chip. The event table circuit according to claim 4, wherein the event table circuit, the control unit and the touch detection circuit are integrated into a touch chip. The event table circuit as described in claim 4, wherein, according to a different transmission protocol content of the active stylus, the control unit executes an event table update process on the storage unit, thereby updating the event table Included are the N+1 values of the time value and the data contents of the N+1 event command data. An event table circuit, coupled between a control unit and a touch detection circuit, which has: a storage unit storing at least one event table, the event table includes multiple pieces of data, and each piece of data includes a time value and an event command data; and a signal processing unit for reading each of the event command data when a count value of a timing unit is sequentially equal to each of the time values, and according to each of the event command data Sequentially send a control command signal to the touch detection circuit. A touch display drive integrated chip, which includes: a control unit, a display drive circuit and a touch detection circuit; characterized in that, the touch display drive integrated chip includes any one of claim 1 to claim 8 The event table circuit described in the item above, and the event table circuit is coupled between the control unit and the touch detection circuit. An information processing device, which has a touch panel, a display panel, and at least one touch display driver integrated chip, and the touch display driver integrated chip includes: a control unit, A display drive circuit and a touch detection circuit; characterized in that, the touch display drive integrated chip includes an event table circuit as described in any one of request item 1 to request item 8, and the event table circuit is coupled to Between the control unit and the touch detection circuit. The information processing device as described in claim 10, wherein the information processing device is selected from the group consisting of smart phones, smart watches, smart bracelets, tablet computers, notebook computers, all-in-one computers, and access control devices One of the electronic devices.

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