CN103472946A - Method for dynamically adjusting reporting rate of touch screen - Google Patents

Abstract

The invention discloses a method for dynamically adjusting the reporting rate of a touch screen, which includes the following steps: (1) setting a detection time, according to the initial setting value of the reporting rate of a single finger on the touch screen and the number of fingers that can be recognized at the same time when touching the touch screen to obtain the threshold of the number of coordinate points received by the application layer within the detection time; (2) set a set value n ₁ smaller than the threshold according to the threshold of the number of coordinate points received by the application layer in step (1) ;(3) During the detection time, the touch screen terminal identifies the number of fingers currently touching; according to the reporting rate of a single finger on the current touch screen, the touch screen terminal calculates the number n of coordinate points received by the application layer within the detection time; n is compared with _n1 : if _n1 is greater than n, then reduce the reporting rate of a single finger on the current touch screen; if _n1 is less than n, then increase the reporting rate of a single finger on the current touch screen; the present invention can dynamically adjust the touch screen The reporting rate ensures the touch effect of the touch screen.

Description

A method of dynamically adjusting the reporting rate of the touch screen

technical field

The invention relates to touch technology, in particular to a method for dynamically adjusting the reporting rate of a touch screen.

Background technique

The touch screen reports coordinate points to the application layer at a fixed reporting rate of 80 points per second, that is to say, when a finger slides on the touch screen, for each finger, the touch screen will report 80 points per second to the application layer Coordinate information, for useless touch coordinate point information, also reports data at 80 points per second, occupying a lot of resources of the host. If it is a multi-finger touch, for example, five fingers slide on the touch screen at the same time, then the application layer will receive about 400 touch coordinate point information per second, which will cause a great burden on the system and cause the system to run The problem of not being smooth and stuck, and even losing some touch information.

The Chinese invention patent with the notification number CN101930319 discloses a method for reporting touch information on a touch screen. The method calculates the distance between the touch point in the previous frame and the touch point in the current frame based on the coordinates of the touch point in the previous frame and the coordinates of the touch point in the current frame. ; Determine the reporting frequency according to the distance, the smaller the distance, the lower the reporting frequency, and the larger the distance, the higher the reporting frequency. This method mainly adjusts the frequency of reporting according to the moving speed of the touch point. When the moving speed of the touch point is slow, reducing the frequency of reporting can reduce the occupation of host resources and the impact on the operation of the host. However, in this method, when multiple fingers act on the touch screen, and the touch speed of each finger (that is, the speed at which the touch point moves) is relatively fast, it is still easy to cause the application layer to receive too many coordinate points. Therefore, this method is only suitable for use when the number of touch points per unit time is small, and is not suitable for use in the case of multi-finger fast touch.

Contents of the invention

The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art, and provide a method for dynamically adjusting the reporting rate of the touch screen. In the state of multi-finger touch, the method dynamically adjusts the reporting rate of the touch screen, that is, meets the requirement of multi-finger touch on the touch screen. required without causing the touch screen terminal to freeze.

The object of the present invention is achieved through the following technical solutions: a method for dynamically adjusting the reporting rate of a touch screen, comprising the following steps:

(1) Set a detection time, according to the initial set value v _max of the reporting rate of a single finger on the touch screen and the maximum number of fingers that can be recognized at the same time when touching the touch screen, obtain the coordinate points received by the application layer within the detection time number of thresholds;

(2) According to the threshold of the number of coordinate points received by the application layer in step (1), set a set value n ₁ smaller than the threshold;

(3) Within the detection time, the touch screen terminal identifies the number of fingers currently touching; according to the reporting rate of a single finger on the current touch screen, the touch screen terminal calculates the number n of coordinate points received by the application layer within the detection time;

(4) Compare the number n of coordinate points received by the application layer within the detection time in step (3) with the set value n ₁ :

If the set value _n1 is greater than n, then reduce the reporting rate of a single finger on the current touch screen;

If the set value _n1 is less than n, then increase the reporting rate of a single finger on the current touch screen;

Make the adjusted single-finger reporting rate adjusted to v _now :

${\mathrm{<span\; class="notranslate">\; v</span>}}_{\mathrm{<span\; class="notranslate">\; now</span>}}<span\; class="notranslate">\; =</span>\left\{\begin{array}{c}\mathrm{<span\; class="notranslate">\; a</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; a</span>}<span\; class="notranslate">\; <</span>{\mathrm{<span\; class="notranslate">\; v</span>}}_{\mathrm{<span\; class="notranslate">\; max</span>}}\\ {\mathrm{<span\; class="notranslate">\; v</span>}}_{\mathrm{<span\; class="notranslate">\; max</span>}}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; a</span>}<span\; class="notranslate">\; \&Greater\; Equal;</span>{\mathrm{<span\; class="notranslate">\; v</span>}}_{\mathrm{<span\; class="notranslate">\; max</span>}}\end{array}\right.<span\; class="notranslate">\; ;</span>$

where a is:

$\mathrm{<span\; class="notranslate">\; a</span>}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; no</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}}{\mathrm{<span\; class="notranslate">\; tf</span>}}<span\; class="notranslate">\; ;</span>$

Where t is the detection time, and f is the number of currently touching fingers identified by the touch screen terminal.

Preferably, the threshold n _max of the number of coordinate points received by the application layer within the detection time obtained in the step (1) is:

n _max = v _max .f _max .t;

Where v _max is the initial set value of the reporting rate of a single finger on the touch screen, i.e. the maximum reporting rate of the touch screen; said f _max is the maximum value of the number of fingers that the touch screen can recognize at the same time, and t is the detection time.

Furthermore, in the step (3), the number n of coordinate points received by the application layer of the touch screen terminal within the detection time is:

n = v.f.t;

Where v is the reporting rate of a single finger on the current touch screen, and f is the number of fingers currently being touched by the touch screen terminal.

Further, the detection time t is 0.1 second, the initial set value v _max of the report rate of the touch screen is 80 points/second, and the maximum value f _max of the number of fingers that the touch screen can recognize at the same time is 5 , then the threshold n _max of the number of coordinate points received by the application layer within the obtained detection time t is 40 points.

Furthermore, the set value _n1 is the number of coordinate points received by the application layer on the premise of not occupying a large amount of system resources and causing the system to freeze within the detection time t, and the set value _n1 is 24 points .

Preferably, the reporting rate of the touch screen is adjusted through the reporting register of the touch screen terminal.

Compared with the prior art, the present invention has the following advantages and effects:

(1) The present invention adjusts the reporting rate of the touch screen in real time and dynamically according to the number of coordinate points received by the application layer within the current detection time; when the number of coordinate points received by the application layer within the detection time is greater than the set value, then Reduce the reporting rate of a single finger on the touch screen to reduce the burden on the system and prevent the application layer from receiving a large number of coordinate points, which will cause a burden on the operation of the touch screen terminal, resulting in unsmooth operation and stuttering of the touch screen terminal; when the application When the number of coordinate points received by the layer within the detection time is less than the set value, the reporting rate of a single finger on the touch screen is increased to ensure the working efficiency of the touch screen terminal. The method of the present invention adjusts the reporting rate of a single finger on the touch screen in real time according to the number of coordinate points received within the detection time of the application layer, so as to ensure that the burden of the system can be effectively reduced when the number of coordinate points is reported too much due to multi-finger touch , to ensure the touch effect. The adjustment of the reporting rate of the touch screen through the method of the present invention will neither affect the touch effect of the touch screen nor cause the system to freeze, and can also improve the user experience.

(2) The setting value in the method of the present invention is set on the premise that it does not occupy a large amount of system resources and cause the system to freeze, thus ensuring that the touch effect will not be affected after the touch screen reporting rate is adjusted.

Description of drawings

Figure 1 is a flow chart of the method of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

Example

As shown in Figure 1, this embodiment discloses a method for dynamically adjusting the reporting rate of the touch screen, including the following steps:

(1) Set a detection time, according to the initial set value v _max of the reporting rate of a single finger on the touch screen and the maximum value f _max of the number of fingers that can be recognized at the same time when touching the touch screen, obtain the information received by the application layer within the detection time t The threshold n _max of the number of coordinate points is:

n _max = v _max .f _max .t;

v _max is the initial setting value of the touch screen report rate, that is, the maximum report rate of the touch screen, f _max is the maximum number of fingers that the touch screen can recognize at the same time, and t is the detection time. In this embodiment, v _max =80 points/second, t=0.1S, f _max =5; therefore n _max is 40.

(2) Set a set value n ₁ smaller than the threshold n _max according to the set threshold n _max , where n ₁ refers to the coordinate point received by the application layer on the premise that it does not occupy a large amount of system resources and cause the system to freeze within the detection time number.

(3) Within the detection time t=0.1S, the touch screen terminal recognizes the number f of fingers currently touching; according to the current report rate v of the touch screen, the touch screen terminal calculates the number n of coordinate points received by the application layer within the detection time, where In this embodiment, the number n of coordinate points received by the application layer of the touch screen terminal within the detection time t is:

n = v.f.t;

v is the reporting rate of a single finger touch on the current touch screen, and f is the number of currently touching fingers recognized by the touch screen terminal.

(4) Compare the number n of coordinate points received by the application layer within the detection time t in step (3) with the set value n ₁ of the number of coordinate points:

If the set value _n1 is greater than n, the reporting rate of a single finger on the current touch screen is reduced through the reporting register of the touch screen terminal;

If the set value _n1 is less than n, the reporting register of the touch screen terminal increases the reporting rate of a single finger on the current touch screen;

Make the adjusted single-finger reporting rate adjusted to v _now :

${\mathrm{<span\; class="notranslate">\; v</span>}}_{\mathrm{<span\; class="notranslate">\; now</span>}}<span\; class="notranslate">\; =</span>\left\{\begin{array}{c}\mathrm{<span\; class="notranslate">\; a</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; a</span>}<span\; class="notranslate">\; <</span>{\mathrm{<span\; class="notranslate">\; v</span>}}_{\mathrm{<span\; class="notranslate">\; max</span>}}\\ {\mathrm{<span\; class="notranslate">\; v</span>}}_{\mathrm{<span\; class="notranslate">\; max</span>}}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; a</span>}<span\; class="notranslate">\; \&Greater\; Equal;</span>{\mathrm{<span\; class="notranslate">\; v</span>}}_{\mathrm{<span\; class="notranslate">\; max</span>}}\end{array}\right.<span\; class="notranslate">\; ;</span>$

where a is:

$\mathrm{<span\; class="notranslate">\; a</span>}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; no</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}}{\mathrm{<span\; class="notranslate">\; tf</span>}}<span\; class="notranslate">\; ;</span>$

In this embodiment, the set value n ₁ is 24 points, and v _max =80 points/second.

If it is detected in step (3) that the number n of coordinate points received by the application layer within the time t is 32, and the touch screen terminal recognizes that the number f of fingers currently touching is 4, then the current reporting rate of each finger is 80 points / second, at this time, the set value n ₁ is less than n, and it is necessary to reduce the number of coordinate points received by the application layer by reducing the reporting rate; through the calculation of step (4), a is 60, and the value of a is less than v at this time _max , so the finger reporting rate is adjusted from 80 points/second to v _now =a=60.

If it is detected in step (3) that the number n of coordinate points received by the application layer within the time t is 20, and the touch screen terminal recognizes that the number f of fingers currently touching is 2, then the current reporting rate of each finger is 40 points/ Seconds, at this time the set value n ₁ is greater than n, it is necessary to increase the number of coordinate points received by the application layer by increasing the reporting rate to ensure the working efficiency of the touch screen; through the calculation of step (4), a is 120, At this time, a≥v _max is satisfied, and the finger reporting rate is adjusted to v _now =60 points/second.

The above-mentioned embodiment is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited by the above-mentioned embodiment, and any other changes, modifications, substitutions, combinations, Simplifications should be equivalent replacement methods, and all are included in the protection scope of the present invention.

Claims (6)

1. A method for dynamically adjusting the reporting rate of the touch screen, characterized in that, comprising the following steps: (1) Set a detection time, according to the initial set value v _max of the reporting rate of a single finger on the touch screen and the maximum number of fingers that can be recognized at the same time when touching the touch screen, obtain the coordinate points received by the application layer within the detection time number of thresholds; (2) According to the threshold of the number of coordinate points received by the application layer in step (1), set a set value n ₁ smaller than the threshold; (3) Within the detection time, the touch screen terminal identifies the number of fingers currently touching; according to the reporting rate of a single finger on the current touch screen, the touch screen terminal calculates the number n of coordinate points received by the application layer within the detection time; (4) Compare the number n of coordinate points received by the application layer within the detection time in step (3) with the set value n ₁ : If the set value _n1 is greater than n, then reduce the reporting rate of a single finger on the current touch screen; If the set value _n1 is less than n, then increase the reporting rate of a single finger on the current touch screen; Make the adjusted single-finger reporting rate adjusted to v _now : ${\mathrm{<span\; class="notranslate">\; v</span>}}_{\mathrm{<span\; class="notranslate">\; now</span>}}<span\; class="notranslate">\; =</span>\left\{\begin{array}{c}\mathrm{<span\; class="notranslate">\; a</span>}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; a</span>}<span\; class="notranslate">\; <</span>{\mathrm{<span\; class="notranslate">\; v</span>}}_{\mathrm{<span\; class="notranslate">\; max</span>}}\\ {\mathrm{<span\; class="notranslate">\; v</span>}}_{\mathrm{<span\; class="notranslate">\; max</span>}}<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; a</span>}<span\; class="notranslate">\; \&Greater\; Equal;</span>{\mathrm{<span\; class="notranslate">\; v</span>}}_{\mathrm{<span\; class="notranslate">\; max</span>}}\end{array}\right.<span\; class="notranslate">\; ;</span>$ where a is: $\mathrm{<span\; class="notranslate">\; a</span>}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; no</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}}{\mathrm{<span\; class="notranslate">\; tf</span>}}<span\; class="notranslate">\; ;</span>$ Where t is the detection time, and f is the number of currently touching fingers identified by the touch screen terminal. 2. The method for dynamically adjusting the reporting rate of the touch screen according to claim 1, wherein the threshold value n _max of the number of coordinate points received by the application layer within the detection time obtained in the step (1) is: n _max = v _max .f _max .t; Where v _max is the initial set value of the reporting rate of a single finger on the touch screen, i.e. the maximum reporting rate of the touch screen; said f _max is the maximum value of the number of fingers that the touch screen can recognize at the same time, and t is the detection time. 3. The method for dynamically adjusting the reporting rate of the touch screen according to claim 2, characterized in that, in the step (3), the number n of coordinate points received by the application layer of the touch screen terminal within the detection time is: n = v.f.t; Where v is the reporting rate of a single finger on the current touch screen, and f is the number of fingers currently being touched by the touch screen terminal. 4. according to the method for dynamically adjusting touch-screen reporting rate described in claim 3, it is characterized in that, described detection time t is 0.1 second, and the initial setting value v _max of described touch-screen reporting rate is 80 points/second, described The maximum number f _max of the number of fingers that can be recognized by the touch screen at the same time is 5, then the threshold n _max of the number of coordinate points received by the application layer within the acquired detection time t is 40 points. 5. The method for dynamically adjusting the reporting rate of the touch screen according to claim 4, wherein the set value _n1 is 24 points. 6. The method for dynamically adjusting the report rate of the touch screen according to claim 1, wherein the report rate of the touch screen is adjusted through a report register of the touch screen terminal.