TW201915677A - Report rate adjustment algorithm for touch and display driver integrated system and touch display device using the same including a detection step, a storing step, an linear interpolation step, and a transmission step - Google Patents

Abstract

A report rate adjustment algorithm for a touch and display driver integrated system is implemented by a control circuit and comprises the steps of: detecting a touch display panel by using a blanking interval to obtain a first touch coordinate at a first time point and a second touch coordinate at a second time point, the second time point being after the first time point; storing the first touch coordinate in a first memory block and storing the second touch coordinate in a second memory block; performing a linear interpolation operation between the first coordinate and the second coordinate to generate at least one interpolated coordinate; and transmitting the at least one interpolated coordinate and the second touch coordinate to a processor.

Description

Touch point and display drive integration system reporting rate adjustment algorithm and touch display device using the same

The present invention relates to an algorithm for a touch and display drive integration system, and more particularly, to a software algorithm for improving the reporting rate adjustment algorithm of a touch and display drive integration system.

With the popularity and vigorous development of mobile devices, touch display devices have become one of the indispensable components.

In the traditional system architecture, the touch and display functions are controlled independently by the touch chip and the display chip, respectively. The Touch and Display Driver Integration (TDDI) system integrates the touch chip and the display chip by The single chip technology not only reduces the number of components, makes the screen thinner, but also improves the light transmittance of the panel, making the battery life longer.

In contrast, some electrodes must be responsible for the dual functions of display and touch scanning. The conventional technology uses a time-division multiplexing method to perform display and touch scan separately, that is, display is performed during a display interval; touch scan is performed during a blanking interval, but it is therefore limited by the frequency of screen updates.

Because the screen update frequency of the commonly used driver chip is 60Hz, the frequency of touch scanning is also 60Hz, which results in insufficient frequency of touch scanning, and the report rate is not high, which affects the sensitivity of touch.

Therefore, there is an urgent need in the art for a novel touch point and display drive integration system reporting rate adjustment algorithm.

The purpose of the present invention is to disclose a report rate adjustment algorithm for a touch and display drive integration system, which improves the report point of a touch and display drive integration system through software calculations without increasing hardware costs. Rate, thereby improving the sensitivity of touch.

In order to achieve the aforementioned purpose, a report rate adjustment algorithm for a touch and display drive integration system is proposed, which is implemented using a control circuit and includes the following steps: detecting a touch display using a blanking interval The panel obtains a first touch coordinate at a first time point and a second touch coordinate at a second time point, the second time point is after the first time point; storing the first touch coordinate To a first memory block and storing the second touch coordinate into a second memory block; performing a linear interpolation operation between the first coordinate and the second coordinate to generate at least one interpolation Coordinates; and transmitting the at least one socket coordinate and the second touch coordinate to a processor.

In one embodiment, the first memory block and the second memory block include a register, a cache memory, or a random access memory.

In one embodiment, the blanking period is a vertical blanking period or a horizontal blanking period.

In one embodiment, the touch display panel comprises an optical touch display panel, a resistive touch display panel, an electromagnetic touch display panel, an acoustic wave touch display panel, and a capacitive touch panel. A touch display panel selected by a group of display panels.

In order to achieve the foregoing object, a touch display driving integration device is proposed, which executes a touch display procedure by using a report rate adjustment algorithm of the touch and display driving integration system as described above.

In order to enable your reviewers to further understand the structure, characteristics, and purpose of the present invention, drawings and detailed descriptions of the preferred embodiments are attached below.

Please refer to FIG. 1, which illustrates a flowchart of steps in an embodiment of an algorithm for adjusting a reporting rate of a touch and display driving integrated system according to the present invention.

As shown in the figure, the report rate adjustment algorithm of the touch and display drive integration system of the present invention includes the following steps:

A blanking interval is used to detect a touch display panel to obtain a first touch coordinate at a first time point and a second touch coordinate at a second time point, the second time point being After the first time point (step a); storing the first touch coordinate in a first memory block and storing the second touch coordinate in a second memory block (step b); Performing a linear interpolation operation between the first coordinate and the second coordinate to generate at least one socket coordinate (step c); and transmitting the at least one socket coordinate and the second touch coordinate to a processor ( Step d).

The processor is used for subsequent touch processing, and is, for example, but not limited to, a system single chip.

The first memory block and the second memory block are used to store the first touch coordinate and the second touch coordinate, and include, for example but not limited to, a register, a cache memory, or a random memory. Accessing memory is a conventional technology, and is not described in detail here.

Touch panels have been widely used in various small and medium-sized consumer electronics and mobile devices, and the intuitive input method of touch operation makes human-computer interaction more convenient.

In the original system architecture, the touch and display functions were independently controlled by the touch chip and the display chip, respectively. The Touch and Display Driver Integration (TDDI) system integrates the touch chip and the display chip by The technology of using a single chip not only reduces the number of components, makes the screen thinner, but also improves the light transmittance of the panel, making the battery life relatively longer.

For touch technology, the reporting rate is an important indicator that directly affects the sensitivity of the touch. The reporting rate refers to the frequency at which the touch panel reports the coordinates of the touch point.

Under the touch and display driver integration system, there are two types of touch scanning modes: vertical and horizontal. In general, the reporting rate of the vertical touch scanning mode is 60 Hz, and the reporting rate of the horizontal touch scanning mode is 120 Hz. However, if the frequency of touch scanning is insufficient, the reporting rate of the touch display device is not high, and the sensitivity of the touch is affected.

Please refer to FIG. 2, which illustrates a schematic diagram of an internal socket mark of the touch rate and display drive integration system of the present invention.

As shown in the figure, the present invention uses a linear interpolation operation between the first touch coordinate 10 and the second touch coordinate 20 to generate at least one socket mark, as shown in the figure. , The second inner socket mark 12, the third inner socket mark 13.

Wherein, the distance between the first touch coordinate 10 and the first inner socket mark 11, the distance between the first inner socket mark 11 and the second inner socket mark 12, and the third inner socket mark 13 and The distance between the second touch coordinates 20 is, for example, but not limited to, an equal distance.

Traditional touch display devices use time-division multiplexing to perform display and touch scan separately. By performing a data display function during the display period, and performing a touch scan function during the blanking interval, and No data is displayed to reduce noise interference during touch scanning.

The present invention uses a blanking interval to transmit the at least one socket mark and the second touch coordinate 20 to a processor, and returns more touch points and actual values through interpolation calculations of the socket mark. The delayed return method of the coordinate (that is, the second touch coordinate 20) can increase the reporting rate of the touch and display drive integration system without increasing the hardware cost, and the more the number of internal sockets , The higher the report rate, the two are showing a positive correlation.

In addition, the blanking period may be a vertical blanking period or a horizontal blanking period; the touch display panel may be an optical touch display panel, a resistive touch display panel, or an electromagnetic touch display panel. An acoustic wave touch display panel or a capacitive touch display panel. Since these touch display panels are a conventional technology, they are not described in detail here.

In addition, according to the foregoing principles, the present invention further proposes a touch display device, which executes a touch display program by using the aforementioned point and rate adjustment algorithm of the touch and display drive integration system.

With the design disclosed above, the present invention improves the reporting rate of the touch and display drive integration system by software calculation without increasing the cost of hardware, thereby improving the sensitivity of touch.

What is disclosed in this case is a preferred embodiment. For example, those who have partial changes or modifications that are derived from the technical ideas of this case and are easily inferred by those skilled in the art, do not depart from the scope of patent rights in this case.

To sum up, regardless of the purpose, method and effect, this case is showing its technical characteristics that are quite different from the conventional ones, and its first invention is practical, and it is also in line with the patent requirements of the invention. Granting patents at an early date will benefit society and feel good.

10‧‧‧ the first touch coordinate

20‧‧‧Second touch coordinates

11‧‧‧The first inner socket mark

12‧‧‧Second inner socket mark

13‧‧‧The third socket mark

Step a‧‧‧ detecting a touch display panel using a blanking interval to obtain a first touch coordinate at a first time point and a second touch coordinate at a second time point, the The second time point is after the first time point;

Step b‧‧‧ storing the first touch coordinate into a first memory block and storing the second touch coordinate into a second memory block;

Step c‧‧‧ performs a linear interpolation operation between the first coordinate and the second coordinate to generate at least one socket coordinate;

Step d‧‧‧ transmits the at least one socket mark and the second touch coordinate to a processor.

FIG. 1 is a flowchart of steps in an embodiment of a reporting rate adjustment algorithm for a touch and display driving integrated system according to the present invention. FIG. 2 is a schematic diagram of an internal socket mark of a report rate adjustment algorithm of the touch and display driving integrated system of the present invention.

Claims (5)

A touch rate and display drive integration system reporting point rate adjustment algorithm is implemented using a control circuit and includes the following steps: using a blanking interval to detect a touch display panel at a first time point Obtaining a first touch coordinate and a second touch coordinate at a second time point, the second time point being after the first time point; storing the first touch coordinate in a first memory block And storing the second touch coordinate in a second memory block; performing a linear interpolation operation between the first coordinate and the second coordinate to generate at least one socket coordinate; and transmitting the at least one The internal socket mark and the second touch coordinate are connected to a processor. According to the point rate adjustment algorithm of the touch and display driving integration system described in the first patent application scope, wherein the first memory block and the second memory block include a register, a cache memory, or A random access memory. According to the algorithm of adjusting the reporting rate of the touch and display drive integrated system as described in the first patent application scope, the blanking period is a vertical blanking period or a horizontal blanking period. As described in item 1 of the patent application, the touch point and display drive integration system reporting point rate adjustment algorithm, wherein the touch display panel is an optical touch display panel, a resistive touch display panel, an electromagnetic A touch display panel selected from the group consisting of a touch display panel, a sonic touch display panel, and a capacitive touch display panel. The invention relates to a touch display device, which executes a touch display program by using a click rate adjustment algorithm of the touch and display drive integration system as described in any one of claims 1 to 4 of the scope of patent application.