CN101430627A - Touch detection method of light-sensing touch control plate and touch control electronic device using the same - Google Patents

Abstract

The invention discloses a touch detection method of a light-sensitive touch panel and a touch electronic device using the touch detection method. In the method, firstly, the light-sensitive touch panel is scanned to obtain an image. Next, in the data of this picture, the distribution area of the data whose luminance value is between the preset luminance value and the first luminance critical value is defined as the first sensing area, and among the data of this picture, the luminance value is between The data distribution area between the preset brightness value and the second brightness critical value is defined as the second sensing area. Then, according to the relative distance between one of the multiple first data points and the corresponding one of the multiple second data points, it is judged whether there may be an actual touch. In the detection area, and the above-mentioned second data point is located in the second sensing area.

Description

Touch detection method of photosensitive touch panel and touch electronic device using same

technical field

The invention relates to the technology in the field of touch control, and in particular to a touch detection method of a photosensitive touch panel and a touch electronic device using the method.

Background technique

Please refer to FIG. 1 , which is a schematic diagram of how to detect the center position of a touch area sensed by a photo sensor touch panel in the prior art. In this figure, the mark 100 represents the picture obtained by scanning the light-sensitive touch panel (not shown), and the data of the picture 100 is composed of 256 data points arranged in a matrix of 16 rows×16 columns (as marked 102) composed of.

The prior art is to define the distribution area of the data in the screen 100 whose luminance value is less than a luminance critical value as the touch area, as shown in the dark area in the figure, and the luminance value is greater than or equal to the aforementioned luminance The distribution area of critical value data is defined as a non-touch area, as shown in the white area in the figure. Therefore, as long as the coordinate values of the data points 104, 106, 108 and 110 in the touch area are known, and then the average value of the coordinate values of these four data points is obtained, the data point 112 located in the center of the touch area can be obtained coordinate value.

However, this way of detecting the center position of the touch area is greatly affected by shadows and lights. For example, when the user touches the light-sensitive touch panel with the index finger, the shadow area caused by the hand is irregular in shape, so that the defined touch area may also be in irregular shape, so if Using the aforementioned method of detecting the center position of the touch area, it is easy to misjudge the center position of the actual touch point, which leads to poor accuracy of the coordinate positioning of the light-sensitive touch panel.

Contents of the invention

The purpose of the present invention is to provide a touch detection method for a light-sensitive touch panel, which can prevent the device using the light-sensitive touch panel from misjudging the center position of the actual touch point, so as to more accurately locate the coordinates.

Another object of the present invention is to provide a touch-sensitive electronic device using the aforementioned method, which can avoid misjudgment of the center position of the actual touch point, so as to perform coordinate positioning more accurately.

The invention proposes a touch detection method for a photosensitive touch panel. In this method, the light-sensitive touch panel is first scanned to obtain a picture. Next, in the data of this picture, the distribution area of the data whose luminance value is between the preset luminance value and the first luminance critical value is defined as the first sensing area, and among the data of this picture, the luminance value is between The data distribution area between the preset brightness value and the second brightness critical value is defined as the second sensing area. Then, according to the relative distance between one of the multiple first data points and the corresponding one of the multiple second data points, it is judged whether there may be an actual touch. Wherein, all the above-mentioned first data points are located in the first sensing area, and all the above-mentioned second data points are located in the second sensing area.

The invention further provides a touch-sensitive electronic device. The touch electronic device includes a photosensitive touch panel and a control circuit. The control circuit is used to scan the light-sensitive touch panel to obtain a picture, and define the distribution area of the data whose luminance value is between the preset luminance value and the first luminance critical value in the data of the picture as the first sensor detection area, and define the distribution area of the data whose luminance value is between the aforementioned preset luminance value and the second luminance critical value in the data of this screen as the second sensing area, so that according to the first data points One and the relative distance of one of the corresponding multiple second data points to determine whether an actual touch may occur. Wherein, all the above-mentioned first data points are located in the first sensing area, and all the above-mentioned second data points are located in the second sensing area.

The present invention uses two different brightness thresholds to operate, one brightness threshold can be used to find out the shadow area caused by the indicator (pointer) blocking the light in the picture, and the other brightness threshold can be used To find out the area where the light is blocked to a certain extent in the aforementioned shadow area. Next, the relative distance of each data point at the relative position in the above two areas can be used to determine whether an actual touch may occur. As long as the above-mentioned relative distance is smaller than the preset distance, it is determined that there may be an actual touch. And once it is judged that there may be an actual touch situation, it can be further calculated whether the number of data points whose relative distance is less than the preset distance reaches a predetermined number in the area where the above-mentioned light is shaded to a certain degree, and if so, then It is judged that there is an actual touch. Even, when the number of data points whose relative distance is less than the preset distance reaches a predetermined number, it can be further judged whether the width and length of the aforementioned shaded area meet the width and length of the preset contact object (such as a finger) respectively. length, if the width and length of the aforementioned shadow area also match the width and length of the preset contact object, it is determined that there is actually an actual touch. Therefore, the present invention can effectively identify the noise caused by the actual touch point and the shadow, and will not misjudge the center position of the actual touch point, so it is less affected by the shadow and light, further making the light-sensitive touch panel The accuracy of coordinate positioning is improved.

In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments are described below in detail with accompanying drawings.

Description of drawings

FIG. 1 is a schematic diagram of how to detect the center position of a touch area sensed by an optical touch panel in the prior art.

FIG. 2 illustrates a touch-sensitive electronic device according to an embodiment of the present invention;

FIG. 3 illustrates the flow of a touch detection method for a photosensitive touch panel according to an embodiment of the present invention;

FIG. 4 is an explanatory diagram of defining the sensing area according to the manner described in step S304.

[Description of main component symbols]

100, 400, 500: picture

102～112, 402: data points

200: Touch Electronic Devices

202: Light-sensitive touchpad

204: control circuit

S304～S312: steps

Detailed ways

FIG. 2 illustrates a touch-sensitive electronic device according to an embodiment of the present invention. The touch electronic device 200 includes a photosensitive touch panel 202 and a control circuit 204 . FIG. 3 illustrates the flow of a touch detection method for a photosensitive touch panel according to an embodiment of the present invention. Please refer to FIG. 2 and FIG. 3 as needed for description. The control circuit 204 is used to scan the light-sensitive touch panel 202 to obtain a frame, and define the distribution area of the data in the frame whose luminance value is between the preset luminance value and the first luminance critical value as The first sensing area, and the distribution area of the data whose luminance value is between the aforementioned preset luminance value and the second luminance critical value among the data of this picture is defined as the second sensing area (as shown in step S304 of FIG. 3 . shown). Generally speaking, there are two ways to execute step S304, one is to obtain the data of a complete frame first, and then define the sensing area, and the other is to acquire the data of the frame while performing the sensing area definition. For the convenience of description, the following first introduces the method of obtaining the data of a complete screen.

Assuming that the second brightness threshold is smaller than the first brightness threshold, and the second brightness threshold is greater than the preset brightness value, then the sensing area defined in step S304 can be explained by FIG. 4 . FIG. 4 is an explanatory diagram of defining a sensing area according to the manner described in step S304. In FIG. 4 , the mark 400 represents a picture obtained by scanning the light-sensitive touch panel 202, and the data of the picture 400 is composed of 256 data points arranged in a matrix of 16 rows×16 columns (as mark 402 shown) composed of. In addition, in the colored areas, the lighter color is the defined first sensing area, such as the shadow area caused by the index finger blocking the light, while the darker color is the defined second sensing area. Area, that is, in the aforementioned shadow area, the area where the light is blocked to a certain degree.

Please refer to FIG. 3 and FIG. 4 as needed for description. After step S304 is executed, next, the control circuit 204 can arbitrarily select a data point in each of the first sensing area and the second sensing area, and then determine the relative distance and the preset distance of the two data points (as shown in step S306 of FIG. 3 ). In this example, in order to facilitate the calculation of the relative distance and conform to the current scanning method (that is, scanning from the 0th column to the 15th column, and each column starts from the 0th row to the 15th row), the control circuit 204 uses the above two Among the data points in the sensing area, the data points located in the same row are corresponding data points, and the relative distance is calculated by using the data points on the edge of the first sensing area, which will be described in detail with FIG. 4 .

Please refer to Figure 4. The so-called corresponding data points, take the data points in the 7th row of Figure 4 as an example, among the data points in the 7th row, the data points belonging to the first sensing area are the data points belonging to the second sensing area corresponding data points; conversely, the data points belonging to the second sensing area are the corresponding data points of the data points belonging to the first sensing area. The so-called data point on the edge of the first sensing area is the first data point belonging to the first sensing area in the same row in the scanning mode from the 0th column to the 15th column, so that As shown in Figure 4, it is the data point whose coordinates are the 7th row and the 2nd column, the coordinates are the data point of the 8th row and the 2nd column, the coordinates are the data point of the 6th row and the 3rd column, and the coordinates are the 9th row and the 3rd The data points in the column are respectively represented by data point (7, 2), data point (8, 2), data point (6, 3) and data point (9, 3). In addition, in this example, the method of calculating the relative distance is to calculate the distance between the two closest sides parallel to the column direction among the eight sides forming two data points.

Please refer to FIG. 3 and FIG. 4 again. Assume that the control circuit 204 randomly selects the data point (7, 2) in the first sensing area and the data point (7, 6) in the second sensing area to calculate the relative distance, and assumes that the preset distance is as shown in Fig. 4 indicates the length of the preset distance, at this time, the control circuit 204 will judge the relationship between the relative distance of the two data points and the preset distance. Since the relative distance between the two data points is less than the preset distance, the control circuit 204 determines that there may be an actual touch near the data point (7, 6) (as shown in step S308 of FIG. 3 ). Once it is determined that there may be an actual touch near the data point (7, 6), the control circuit 204 will search for other relative distances near the data point (7, 6) that are also smaller than the preset distance and belong to the second The data points in the sensing area, and calculate whether the number of data points whose relative distance is less than the preset distance in the second sensing area reaches a predetermined number; and once it is judged to be yes, the control circuit 204 will judge that this is true The actual touch occurs (as shown in step S310 ), which will be described in detail with FIG. 4 .

Assume that the predetermined number is six data points, so in the situation shown in FIG. The relative distances of (8,5), data point (7,4) and data point (8,4) are all less than the aforementioned preset distance, and the number of these data points has reached a predetermined number, so the control circuit 204 will It is determined that the location of these six data points is actually touched, so the location of these six data points will be regarded as the actual touch location, and then the center position of the actual touch location will be further calculated .

Please refer to FIG. 3 and FIG. 4 again. In another embodiment, assuming that the control circuit 204 randomly selects the data point (7, 2) in the first sensing area and the data point (7, 8) in the second sensing area to calculate the relative distance, then the control The circuit 204 will determine that the relative distance between the two data points is greater than or equal to the aforementioned preset distance. Next, the control circuit 204 starts from the data point (7, 8) and searches column by column toward column 0, so as to detect whether there is a data point whose relative distance is less than the preset distance in the second sensing area, and Counting the data points whose relative distance is less than the preset distance in the second sensing area. Once the control circuit 204 determines that in the second sensing region, the number of data points whose relative distance is less than the preset distance does not reach the aforementioned predetermined number, it will determine that the vicinity of the data point (7, 8) is only caused by shadows. Noise without actual touch occurs (as shown in step S312). In other words, as long as the light is shaded to a certain extent, if the number of data points whose relative distance is less than the preset distance is not enough, it will be regarded as a shadow and this situation will be excluded.

From the above description, it can be seen that as long as the above-mentioned first brightness threshold value, second brightness threshold value, preset distance and predetermined number are properly set, the present invention can effectively identify the actual touch point and the noise caused by the shadow, The center position of the actual touch point will not be misjudged, so it is less affected by shadow and light, which further improves the accuracy of the coordinate positioning of the light-sensitive touch panel.

Next, another way of judging whether there is an actual touch will be described. This way is when the photosensitive touch panel 202 is scanned column by column, the control circuit 204 counts the data points belonging to the second sensing area. , the number of relative distances less than the preset distance. Next, the screen 400 shown in FIG. 4 is used for illustration, please refer to FIG. 4 . When scanning starts from column 0 to column 4, since the acquisition of data in each column starts from row 0 to row 15, the control circuit 204 will first obtain the data points of the second sensing area ( 7, 4). Since the relative distance between the data point (7, 4) and the data point (7, 2) is smaller than the aforementioned preset distance, the control circuit 204 determines that there may be an actual touch near the data point (7, 4). Then, the control circuit 204 will use the data point (7, 4) as a starting data point of the second sensing region, and start scanning along the data acquisition direction from left to right and from top to bottom. counting the number of data points whose relative distance is less than the preset distance in the second sensing area.

Therefore, after determining that the relative distance between the two data points whose coordinates are (7, 4) and (7, 2) is less than the preset distance, the control circuit 204 will then sequentially determine that the coordinates are (8, 4) And (8, 2) these two data points, the coordinates are (7, 5) and (7, 2) these two data points, the coordinates are (8, 5) and (8, 2) these two data points, The relative distances of the two data points (7, 6) and (7, 2), and the two data points (8, 6) and (8, 2) are also less than the preset distance, and it is judged that as of now So far, in the second sensing area, the number of data points whose relative distance is less than the preset distance has reached the aforementioned predetermined number (that is, six data points), so the control circuit 204 will determine that the data points (7, 4), Data point (8, 4), data point (7, 5), data point (8, 5), data point (7, 6) and data point (8, 6) are where there is a real physical touch situation occurs. This method of column-by-column judgment has an advantage, that is, only a small amount of memory can be used to achieve touch detection.

It is worth mentioning that, in the foregoing embodiments, the control circuit 204 must count the data points belonging to the second sensing area in the shadow area caused by the index finger. However, if the shadow area presents the shape of several fingers or the entire palm, the control circuit 204 must count the data points belonging to the second sensing area in the shadow area caused by each finger. In this way, the multi-touch recognition function can be realized.

In addition, although in the description of the foregoing embodiments, the control circuit 204 uses the data points in the same row as the corresponding data points among the data points of the above two sensing areas, and is based on the current scanning method ( That is, scan from column 0 to column 15, each column starts from row 0 to row 15), and in the same row is the first data point belonging to the first sensing area to calculate the relative distance. However, the control circuit 204 can also be combined with other methods to calculate the relative distance. For example, among the data points of the above two sensing areas, the data points located in the same column are the corresponding data points, and then according to In the current scanning mode, the relative distance is calculated from the first and last data points belonging to the first sensing area in the same row. Then use Figure 4 to illustrate it.

Please refer to Figure 4. Taking the data points in the fourth column of Figure 4 as an example, among the data points in the fourth column, the data points belonging to the first sensing area are the corresponding data points of the data points belonging to the second sensing area; conversely In other words, the data points belonging to the second sensing area are the corresponding data points of the data points belonging to the first sensing area. The so-called according to the current scanning method, in the same column are the first and last data points belonging to the first sensing area respectively. If illustrated in FIG. 4, it is the data point (7, 2) and the data point ( 8, 2), and in row 6 and row 9, the data points belonging to the first sensing region.

Continue above. Therefore, the control circuit 204 can judge the relative distance between the two data points whose coordinates are (7,4) and (7,2), and the two data points whose coordinates are (8,4) and (8,2). In addition, you can also judge the two data points whose coordinates are (7,4) and (6,4), the two data points whose coordinates are (8,4) and (9,4), and whose coordinates are (7 , 5) and (6, 5) these two data points, the coordinates are (8, 5) and (9, 5) these two data points, the coordinates are (7, 6) and (6, 6) these two The data points, the two data points whose coordinates are (8, 6) and (9, 6), the two data points whose coordinates are (7, 7) and (6, 7), the coordinates are (8, 7) and ( 9, 7) the two data points, the two data points with coordinates (7, 8) and (6, 8), and the relative relationship between the two data points with coordinates (8, 8) and (9, 8) distance. When all the above-mentioned relative distances are less than the aforementioned preset distances, the control circuit 204 judges the data points (7, 4), data points (8, 4), data points (7, 5), data points (8 , 5), data point (7, 6), data point (8, 6), data point (7, 7), data point (8, 7), data point (7, 8) and data point (8, 8 ) where physical contact may occur. Therefore, the control circuit 204 can further calculate whether the number of data points whose relative distance is less than the preset distance in the second sensing area reaches the aforementioned predetermined number. In this way, the probability of the touch-sensitive electronic device 200 misjudging the actual touch location can be reduced.

Furthermore, when the number of data points whose relative distance is less than the preset distance reaches a predetermined number, the control circuit 204 can further judge the aforementioned first sensing area (that is, the shadow area caused by the index finger blocking the light) Whether the width and length of the first sensing area match the width and length of a normal finger respectively, and if the width and length of the first sensing area also match the width and length of a normal finger, then the control circuit 204 judges that there is an actual touch occur. In this way, the probability of the touch-sensitive electronic device 200 misjudging the actual touch location can be further reduced. Certainly, the control circuit 204 is not limited to only judging whether the width and length of the aforementioned first sensing area are consistent with the width and length of a normal finger, if the aforementioned first sensing area is formed by other preset contact objects (For example, an indicator stick) shields the shadow area caused by light, then the control circuit 204 can also determine whether the width and length of the aforementioned first sensing area meet the width and length of the preset contact object respectively.

In addition, in the above-mentioned embodiments, the control circuit 204 may define the above-mentioned first brightness critical value and second brightness critical value according to a first percentage and a second percentage of an average brightness value of a frame. Of course, the average brightness value of the frame includes the average brightness value of a previous frame obtained by scanning the light-sensitive touch panel 202 before the frame 400 (or the frame 500 ).

To sum up, the present invention uses two different brightness thresholds to operate, one of which can be used to find out the shadow area caused by the indicator blocking light in the picture, and the other brightness threshold Then it can be used to find out the area where the light is blocked to a certain degree in the aforementioned shadow area. Next, the relative distance of each data point at the relative position in the above two areas can be used to determine whether an actual touch may occur. As long as the above-mentioned relative distance is smaller than the preset distance, it is determined that there may be an actual touch. And once it is judged that there may be an actual touch situation, it can be further calculated whether the number of data points whose relative distance is less than the preset distance reaches a predetermined number in the area where the above-mentioned light is shaded to a certain degree, and if so, then It is judged that there is an actual touch. Even, when the number of data points whose relative distance is less than the preset distance reaches a predetermined number, it can be further judged whether the width and length of the aforementioned shaded area meet the width and length of the preset contact object respectively, if the aforementioned If the width and length of the shaded area also match the width and length of the preset contact object, it is determined that there is an actual touch. Therefore, the present invention can effectively identify the noise caused by the actual touch point and the shadow, and will not misjudge the center position of the actual touch point, so it is less affected by the shadow and light, further making the light-sensitive touch panel The accuracy of coordinate positioning is improved.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Those skilled in the art can make various corresponding modifications according to the present invention without departing from the spirit and essence of the present invention. Changes and deformations, but these corresponding changes and deformations should fall within the scope of protection of the appended claims of the present invention.

Claims (24)

1. A touch detection method for a light-sensitive touch panel, characterized in that the method comprises: scanning a photosensitive touch panel to obtain a picture; In the data of the picture, the distribution area of the data whose luminance value is between a preset luminance value and a first luminance critical value is defined as a first sensing area, and among the data of the picture, the luminance value between A distribution area of data between the preset brightness value and a second brightness critical value is defined as a second sensing area; and According to a relative distance between one of the plurality of first data points and one of the corresponding plurality of second data points, it is judged whether there may be an actual touch situation, Wherein, the first data points are located in the first sensing area, and the second data points are located in the second sensing area. 2. The touch detection method according to claim 1, further comprising the following steps: Among the first data points and the second data points, the data points located in the same row are corresponding first data points and second data points. 3. The touch detection method according to claim 1, further comprising the step of: using the data points located in the same column among the first data points and the second data points as the corresponding first data points A data point and a second data point. 4. The touch detection method according to claim 1, wherein when the relative distance is less than a preset distance, it is determined that there may be an actual touch. 5. The touch detection method according to claim 4, wherein when the relative distance is greater than or equal to the preset distance, and the relative distance detected before that is smaller than the preset distance, the second When the number of data points does not reach a predetermined number, it is determined that no actual touch occurs. 6. The touch detection method as claimed in claim 4, wherein the first data points are located on the edge of the first sensing area. 7. The touch detection method according to claim 4, wherein when it is judged that there may be an actual touch, the distance between the second data points whose relative distance is less than the preset distance is further calculated. Whether the number reaches a predetermined number, if so, it is judged that there is actually an actual touching situation. 8. The touch detection method according to claim 7, wherein calculating the number of the second data points whose relative distance is less than the preset distance comprises the following steps: From within the second sensing area, a data point located in the same data row as the first initial second data point used to calculate the relative distance, and a predetermined direction starting from the initial second data point count; and According to the counting result, it is judged whether the second data points with the relative distance less than the preset distance reach the predetermined number. 9. The touch detection method according to claim 7, wherein when it is detected that the relative distance of one of the second data points is greater than or equal to the preset distance, and the relative distance detected before that is When the number of the second data points whose distance is less than the preset distance does not reach the predetermined number, it is determined that there is no actual touch. 10. The touch detection method according to claim 4, characterized in that, when it is judged that there may be an actual touch situation, the relative distance of the second data points whose relative distance is smaller than the preset distance is further calculated. Whether the number reaches a predetermined number, and judging whether the width and length of the first sensing area meet the width and length of a preset contact object, if the relative distance is less than the preset distance of the second data points When the number of objects reaches the preset number, and the width and length of the first sensing area respectively match the width and length of the preset contact object, it is determined that there is an actual touch. 11. The touch detection method according to claim 1, further comprising: The first brightness threshold and the second brightness threshold are defined according to a first percentage and a second percentage of an average brightness value of a frame. 12. The touch detection method according to claim 11, wherein the average brightness value of the frame includes an average brightness value of a previous frame obtained by scanning the light-sensitive touch panel before the frame. 13. A touch-sensitive electronic device, comprising: a light-sensitive touchpad; and A control circuit, used to scan the light-sensitive touch panel to obtain a frame, and distribute the data in the frame whose luminance value is between a preset luminance value and a first luminance critical value The area is defined as a first sensing area, and in the data of the picture, the distribution area of data whose luminance value is between the preset luminance value and a second luminance critical value is defined as a second sensing area, In order to determine whether an actual touch may occur according to a relative distance between one of the first data points and the corresponding one of the second data points, Wherein, the first data points are located in the first sensing area, and the second data points are located in the second sensing area. 14. The touch-sensitive electronic device according to claim 13, wherein the control circuit comprises a first data point corresponding to a data point located in the same row among the first data points and the second data points. A data point and a second data point. 15. The touch-sensitive electronic device according to claim 13, wherein the control circuit comprises a first data point corresponding to a data point in the same column among the first data points and the second data points. A data point and a second data point. 16. The touch-sensitive electronic device as claimed in claim 13, wherein when the relative distance is less than a preset distance, the control circuit determines that there may be an actual touch. 17. The touch-sensitive electronic device according to claim 16, wherein when the relative distance is greater than or equal to the preset distance, and the relative distance detected by the control circuit before that is less than the preset distance When the number of the second data points does not reach a predetermined number, the control circuit determines that no actual touch occurs. 18. The touch-sensitive electronic device method as claimed in claim 16, wherein the first data points are located on the edge of the first sensing area. 19. The touch-sensitive electronic device as claimed in claim 16, wherein when it is judged that there may be an actual touch, the control circuit further calculates the number of the relative distances that are smaller than the preset distance. Whether the number of the two data points reaches a predetermined number, if so, it is judged that there is an actual touching situation. 20. The touch-sensitive electronic device according to claim 19, wherein, when the control circuit calculates the number of the second data points whose relative distance is less than the preset distance, it is from the second sensor In the measurement area, the first second data point used to calculate the relative distance is located in the data point of the same data column, and the starting second data point is used as the starting point to count toward a predetermined direction, and then according to As a result of the counting, it is judged whether the second data points with the relative distance less than the preset distance reach the predetermined number. 21. The touch-sensitive electronic device according to claim 19, wherein when the control circuit detects that the relative distance of one of the second data points is greater than or equal to the preset distance, and the detected When the number of the second data points whose relative distance is less than the preset distance does not reach the predetermined number, the control circuit determines that there is no actual touch. 22. The touch-sensitive electronic device as claimed in claim 16, wherein when it is determined that there may be an actual touch, the control circuit further calculates the number of the relative distances that are smaller than the preset distance. Whether the number of the two data points reaches a predetermined number, and judge whether the width and length of the first sensing area meet the width and length of a preset contact object, if the relative distance is less than the preset distance The number of the second data points reaches the preset number, and the width and length of the first sensing area respectively match the width and length of the preset contact object, and the control circuit judges that there is an actual touch occur. 23. The touch-sensitive electronic device according to claim 13, wherein the control circuit comprises a first percentage and a second percentage of an average screen brightness value to define the first brightness threshold and the second brightness threshold. 24. The touch-sensitive electronic device as claimed in claim 23, wherein the average brightness value of the frame includes an average brightness value of a previous frame obtained by scanning the light-sensitive touch panel before the frame.

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