CN111433835B - Flexible touch display device and touch compensation method - Google Patents
Flexible touch display device and touch compensation method Download PDFInfo
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- CN111433835B CN111433835B CN201780097434.XA CN201780097434A CN111433835B CN 111433835 B CN111433835 B CN 111433835B CN 201780097434 A CN201780097434 A CN 201780097434A CN 111433835 B CN111433835 B CN 111433835B
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Abstract
A touch compensation method is applied to a flexible touch display screen and comprises the following steps: the method comprises the steps that a plurality of detection units (12) in the flexible touch display screen are used for respectively detecting the electrical parameters of each light-emitting display device (11) of the flexible touch display device (100) to generate corresponding detection signals; judging whether the electrical parameter of each light-emitting display device (11) changes or not according to the detection signal generated by each detection unit (12) and judging whether the variation meets a preset condition or not; determining at least one target pixel point (P1) corresponding to at least one light-emitting display device (11) with the variation of the electrical parameter meeting a preset condition, and determining at least one target touch unit (21) needing compensation according to the at least one target pixel point (P1); and touch compensation is performed on the at least one target touch unit (21). A flexible touch display device (100). The flexible touch display device (100) and the touch compensation method can effectively detect a bending area and perform touch compensation.
Description
Technical Field
The present invention relates to a touch control technology, and more particularly, to a flexible touch display device and a touch compensation method for the same.
Background
At present, an OLED (Organic Light Emitting Diode) display screen is widely used, and since the OLED display screen is displayed by self-luminescence of a Diode, the thickness of the OLED display screen can be thinner, and the OLED display screen can be made into a flexible display screen, the OLED display screen can be integrated with a flexible touch panel to form the flexible touch display screen. The flexible touch display screen can be wound at will, so that more scenes can be applied and adapted.
However, if the existing flexible touch display screen is wound or bent, the touch sensitivity of the bent portion is obviously changed relative to the area where the bending does not occur, and a jumping point phenomenon is caused due to uneven touch variation, so that the bent portion cannot effectively and accurately respond to the touch.
Disclosure of Invention
The embodiment of the invention discloses a flexible touch display device and a touch compensation method, which can effectively detect the position where bending occurs and perform touch compensation on the position where bending occurs.
The embodiment of the invention discloses a flexible touch display device which comprises a flexible display panel, a flexible touch panel and a processor. The flexible display panel comprises a plurality of light-emitting display devices arranged in an array and a plurality of detection units, each light-emitting display device is correspondingly and electrically connected with one detection unit, each light-emitting display device correspondingly forms a pixel point, and each detection unit is used for detecting the electrical parameters of the light-emitting display devices to generate corresponding detection signals. The flexible touch panel is overlapped on the flexible display panel and comprises a plurality of touch units, and each touch unit corresponds to a plurality of pixel points. The processor is electrically connected with the detection units and the touch units and is used for receiving the detection signals generated by each detection unit, judging whether the electrical parameters of each light-emitting display device change or not and whether the variation meets the preset condition or not according to the detection signals generated by each detection unit, determining at least one target pixel point corresponding to at least one light-emitting display device with the variation meeting the preset condition when the variation of the electrical parameters of at least one light-emitting display device meets the preset condition, determining the target touch unit needing compensation according to the at least one target pixel point, and performing touch compensation on the target touch unit.
The application also discloses a touch compensation method, which is applied to a flexible touch display device, wherein the flexible touch display device comprises a plurality of light-emitting display devices arranged in an array and a plurality of detection units, and each detection unit is correspondingly connected with one light-emitting display device; the touch compensation method includes the steps of: respectively detecting the electrical parameters of each light-emitting display device of the flexible touch display device through a plurality of detection units to generate corresponding detection signals; judging whether the electrical parameter of each light-emitting display device changes or not according to the detection signal generated by each detection unit and judging whether the variable quantity meets a preset condition or not; and when the variable quantity of the electrical parameter of at least one light-emitting display device is determined to meet the preset condition, determining at least one target pixel point corresponding to the at least one light-emitting display device with the variable quantity of the electrical parameter meeting the preset condition, and determining at least one target touch unit needing compensation according to the at least one target pixel point.
According to the flexible touch display device and the touch compensation method, the target pixel point in the bending area is determined by detecting the change of the electrical parameter of the light-emitting display device, at least one target touch unit needing to be compensated and located in the bending area is further determined according to the target touch unit corresponding to the target pixel point, at least one target touch unit is compensated, the position where bending occurs at will can be accurately detected, the touch at the position where bending occurs is well compensated, the touch performance of the flexible touch display device in the bending scene is improved, and the use experience of a user is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a side view of a flexible touch display device according to an embodiment of the invention.
Fig. 2 is a block diagram of a flexible touch display device according to an embodiment of the invention.
Fig. 3 is a schematic diagram illustrating a division of a flexible touch panel and a flexible display panel according to an embodiment of the present invention.
Fig. 4 is a block diagram of a flexible display panel according to an embodiment of the invention.
Fig. 5 is a schematic view of a target touch unit corresponding to the flexible touch display device when the flexible touch display device is bent according to an embodiment of the invention.
Fig. 6 is a schematic diagram illustrating a bending center of a touch unit according to an embodiment of the invention.
Fig. 7 is a schematic diagram illustrating a bending center of a touch unit according to another embodiment of the invention.
Fig. 8 is a schematic diagram illustrating a bending center of a touch unit according to still another embodiment of the invention.
Fig. 9 is a specific circuit diagram of the detecting unit and the driving unit according to an embodiment of the invention.
Fig. 10 is a block diagram of a processor according to an embodiment of the invention.
FIG. 11 is a flowchart illustrating a touch compensation method according to an embodiment of the invention.
FIG. 12 is a sub-flowchart of step S97 in FIG. 11 in one embodiment.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic side view of a flexible touch display device 100 according to an embodiment of the invention. As shown in fig. 1, the flexible touch display device 100 includes a flexible display panel 1 and a flexible touch panel 2 laminated on the flexible display panel 1. The flexible display panel 1 is used for displaying pictures, and the flexible touch panel 2 is used for touch input to perform human-computer interaction.
Fig. 2 is a block diagram of a flexible touch display device 100. The flexible touch display device 100 includes the flexible display panel 1, the flexible touch panel 2, and a processor 3.
Fig. 3 is a schematic diagram of unit division of the flexible touch panel 2 and the flexible display panel 1. As shown in fig. 3, the flexible touch panel 2 is divided into a plurality of touch units 21 according to touch resolution, and each touch unit 21 can be regarded as one touch point area. The flexible display panel 1 is also divided into a plurality of pixel points P1 according to the display resolution. That is, the flexible touch panel 2 includes a plurality of touch units 21, and the flexible display panel 1 includes a plurality of pixel points. In general, the touch units 21 are divided to satisfy the recognition sensitivity of the user's finger or stylus pen, and since the area of the touch point region required for touch is generally significantly larger than the area of the pixel point P1, each touch unit 21 corresponds to a plurality of pixel points P1. In fig. 3, a pixel point P1 of the flexible display panel 1 is illustrated as an example only at a position of a part of the touch unit 21. Wherein, the division of the flexible touch panel 2 and the flexible display panel 1 is logically divided.
Fig. 4 is a block diagram of the flexible display panel 1. The flexible display panel 1 includes a plurality of light emitting display devices 11 arranged in an array and a plurality of detecting units 12. Wherein, each light emitting display device 11 is electrically connected to a detecting unit 12. Each of the light emitting display devices 11 correspondingly constitutes one pixel point P1.
Each detection unit 12 is configured to detect an electrical parameter of the light emitting display device 11 to generate a corresponding detection signal.
The processor 3 is electrically connected to the detecting units 12 and the touch units 21, and is configured to receive the detecting signal generated by each detecting unit 12, and determine whether the electrical parameter of each light-emitting display device 11 changes and whether the variation satisfies a preset condition according to the detecting signal generated by each detecting unit 12. Wherein the electrical parameter includes at least one of voltage and current, and the detection signal includes at least one of voltage and current. The preset condition is that the variation is greater than a first preset threshold and smaller than a second preset threshold, the second preset threshold is far smaller than the variation of the electrical parameter of the light-emitting display device 11 when the display frame of the flexible display panel 1 is switched between frames, and the first preset threshold may be zero or a value greater than zero and smaller than the second preset threshold. And when the processor 3 judges that the variation is larger than the first preset threshold and smaller than the second preset threshold, the processor determines that the preset condition is met, and when the processor 3 judges that the variation is smaller than the first preset threshold or larger than the second preset threshold, the processor determines that the preset condition is not met.
The processor 3 determines at least one target pixel point P1 corresponding to at least one light-emitting display device 11, of which the variation of the electrical parameter satisfies the preset condition, when it is determined that the variation of the electrical parameter of the at least one light-emitting display device 11 satisfies the preset condition, determines at least one target touch unit 21 that needs to be compensated according to the at least one target pixel point P1, and performs touch compensation on the at least one target touch unit 21.
Therefore, in the present application, the detection unit 12 detects the change of the electrical parameter of the light emitting display device 11 to determine the target pixel point P1 in the bending region, and further determines the at least one target touch unit 21 in the bending region to be compensated according to the target touch unit 21 corresponding to the target pixel point P1 to compensate the at least one target touch unit 21.
In some embodiments, the flexible display panel 1 and the flexible touch panel 2 are both mapped to the same coordinate system, and each coordinate corresponds to one pixel point P1. For example, all the pixels are mapped to a rectangular coordinate system, each pixel point P1 of the flexible display panel 1 corresponds to a coordinate value, and each touch unit 21 of the flexible touch panel 2 corresponds to a coordinate set. After the target pixel point P1 is determined, the processor 3 determines, according to the coordinate set to which the coordinate corresponding to the target pixel point P1 belongs, that the touch unit 21 corresponding to the target pixel point P1 is the target touch unit 21, that is, as long as a certain touch unit 21 corresponds to one target pixel point P1, it indicates that the corresponding position of the touch unit 21 is bent, so as to determine that the touch unit 21 is the target touch unit 21 that needs to be compensated, thereby determining at least one target touch unit 21.
Referring to fig. 5, when the flexible touch display device 100 is bent, the electrical parameter of the light emitting display device 11 corresponding to the bent region changes, such as a current value or a voltage value, and the detecting unit 12 can detect the electrical parameter of the light emitting display device 11 corresponding to the bent region and feed the detected value back to the processor, and when the detected electrical parameter changes by a predetermined amount, the processor determines the pixel point P1 corresponding to the light emitting display device 11 as the target pixel point P1 and determines the touch unit 21 corresponding to the target pixel point P1 as the target touch unit 21, thereby determining a plurality of target touch units 21, such as A, B, C shown in fig. 5, located in the bent region Z1 shown in fig. 5.
In some embodiments, the processor 3 performs the touch compensation on at least one target touch unit 21 according to a ratio of the number of target pixel points P1 in the target touch unit 21 to the number of all pixel points P1 in the target touch unit 21. That is, in some embodiments, the processor 3 performing touch compensation on at least one touch unit 21 includes: determining the proportion of the number of target pixel points P1 included in each touch unit 21 to all the pixel points P1 in the touch unit 21, and performing touch compensation on each touch unit 21 according to the proportion. In some embodiments, the processor 3 determines the ratio of the number of target pixel points P1 included in each touch unit 21 to all pixel points P1 in the touch unit 21 according to the ratio of the number of coordinates of the target pixel point P1 included in each touch unit 21 to the number of coordinates in the coordinate set corresponding to the touch unit 21.
Further, as shown in fig. 3, the flexible touch panel 2 is provided with touch nodes J1 arranged in a matrix, an area formed by connecting two adjacent touch nodes J1 in pairs to surround forms a touch unit 21, and the touch unit 21 includes a plurality of touch nodes J1 surrounding the touch unit 21. For example, as shown in fig. 3, four touch nodes J1 are connected two by two to form one touch unit 21, and each touch unit 21 includes four touch nodes J1. The touch node J1 may be a mutual capacitance touch sensing point or a self-capacitance touch sensing point, and in general, when a user touches with a finger or a stylus pen, the user will contact with a plurality of touch nodes J1, and the final user touch position is obtained by analyzing the positions of the plurality of touch nodes J1 to determine the touched touch unit 21. As shown in fig. 3, each touch unit 21 has a rectangular shape, and each touch unit 21 includes four touch nodes located at the vertices of the rectangular shape.
Therefore, the touch detection function of the touch unit 21 is actually realized by the touch node J1, and in the present application, the touch compensation performed by the processor 3 on one touch unit 21 is realized by compensating the corresponding touch node J1 of the touch unit 21.
The processor 3 determines the touch node J1 that needs to be compensated according to the ratio of the number of the target pixel points P1 included in each touch unit 21 to the number of all the pixel points P1 in the touch unit 21, and compensates the determined touch node J1 that needs to be compensated.
Specifically, the processor 3 controls to perform touch compensation on all touch nodes J1 of the touch unit 21 when the ratio of the number of target pixel points P1 included in a certain touch unit 21 to the number of all pixel points P1 included in the touch unit 21 exceeds a preset ratio.
When the ratio of the area of the target pixel point P1 included in a certain touch unit 21 to the area of the touch unit 21 is smaller than the preset ratio, the processor 3 determines the bending center position of the touch unit 21, and compensates the touch node J1 of the touch unit 21, where the distance from the bending center position is smaller than the preset distance. In some embodiments, the predetermined ratio is 1/2. Obviously, in other embodiments, the preset ratio may also be 1/3, 2/5, etc., and may be adjusted as needed. The preset distance may be a value determined according to a touch resolution, and when the distance between the bending center position and the touch node J1 is smaller than the preset distance, touch compensation needs to be performed on the influence of the touch parameter variation on the touch.
Specifically, the processor 3 determines the bending center position of the touch unit 21 according to the coordinates of all target pixels P1 in the touch unit 21 and the variation of the electrical parameter of the light-emitting display device 11 corresponding to each target pixel P1.
Wherein, assuming that the coordinates of the bending center position C1 are (Xc1, Yc1), the processor 3 calculates the formula according to the X coordinate:
calculating the X coordinate Xc1 of the bending center position C1, wherein XpRefers to an X coordinate of a pth target pixel point P1 in the touch unit 21, and Δ Ep refers to an electrical parameter variation of the light emitting display device 11 corresponding to the pth target pixel point P1.
The processor 3 calculates a formula according to the Y coordinate:
calculating the Y coordinate Yc1 of the bending center position C1, wherein YpThe Y coordinate of the pth target pixel point P1 in the touch unit 21 is referred to, and Δ Ep refers to the electrical parameter variation of the light emitting display device 11 corresponding to the pth target pixel point P1.
In this application, the flexible touch display device 100 may set the vertex of the lower left corner of the flexible touch display device 100 as the origin, set the long side connected to the vertex of the lower left corner as the X axis, set the wide side connected to the vertex of the lower left corner as the Y axis, and establish a rectangular coordinate system, so as to determine the positions of the pixel point P1/the target pixel point P1 and the position of the touch unit 21.
Fig. 6 is a schematic diagram of a bending center position C1 of one touch unit 21 according to an embodiment. As shown in fig. 6, the touch unit 21 includes four touch nodes J1a, J1b, J1C, and J1d, and if the calculated bending center position C1 is smaller than the preset distance from the touch nodes J1a and J1b, and the calculated bending center position C1 is larger than the preset distance from the touch nodes J1C and J1d, the processor 3 controls touch compensation to the touch nodes J1a and J1b of the touch unit 21.
Fig. 7 is a schematic diagram of a bending center position C1 of a touch unit 21 according to another embodiment. In another embodiment, if the calculated bending center position C1 is less than the preset distance from the touch nodes J1b, J1C and the calculated bending center position C1 is greater than the preset distance from the touch nodes J1a, J1d, the processor 3 controls the touch compensation to the touch nodes J1b, J1C of the touch unit 21.
Fig. 8 is a schematic diagram of a bending center position C1 of a touch unit 21 according to still another embodiment. In other embodiments, if the calculated bending center position C1 is only located at a distance from the touch node J1b that is less than the preset distance and is located at a distance from the touch nodes J1ca, J1C, and J1d that is greater than the preset distance, the processor 3 only controls the touch compensation on the touch node J1b of the touch unit 21. Wherein, the processor 3 performs the touch compensation on the touch node J1 of the touch unit 21 to compensate the touch parameter of the touch node J1 according to a preset compensation factor. The compensation factor can be determined in advance according to the touch parameter needing to be compensated when the touch panel is bent. The touch parameters include touch sensitivity, touch location, and the like.
Referring back to fig. 2, as shown in fig. 2, the flexible display panel 1 further includes a plurality of driving units 13, and each driving unit 13 is electrically connected to a light emitting display device 11 and is configured to drive the light emitting display unit 11 to display.
The processor 3 is connected to the plurality of driving units 13, and is configured to apply corresponding driving signals to the corresponding driving units 13 according to display data of a current display image, so as to drive the corresponding light-emitting display devices 11 to emit light through the corresponding driving units 13, where the plurality of light-emitting display devices 11 arranged in an array emit corresponding light to form a corresponding display image.
Fig. 9 is a schematic structural diagram of the driving unit 13 and the detecting unit 12 in an embodiment.
In some embodiments, each driving unit 13 includes a scan switch transistor T1 and a driving switch transistor T2. The driving switch transistor T2 is electrically connected between a driving power supply Vpos, the scanning switch transistor T1 and the corresponding light emitting display device 2. The scan switch tube T1 is also electrically connected to the processor 3, and the processor 3 applies the driving signal through the scan switch tube T1.
In some embodiments, the scan switch transistor T1 and the driving switch transistor T2 are MOS transistors, the Light Emitting display device 2 includes an Organic Light Emitting Diode (OLED) D1, and the electrical parameter of the Light Emitting display device 11 is a voltage or a current of the anode V + of the Organic Light Emitting Diode D1. The source of the driving switch transistor T2 is connected to the driving power supply Vpos, the drain is connected to the positive electrode V + of the organic light emitting diode D1, the gate of the driving switch transistor T2 is connected to the drain of the scan switch transistor T1, and the source and gate of the scan switch transistor T1 are connected to the processor 3. The cathode V-of the organic light emitting diode D1 is grounded.
As shown in fig. 9, the light emitting display device 2 includes only one organic light emitting diode D1, and it is apparent that in other embodiments, the light emitting display device 2 may include a plurality of organic light emitting diodes D1 connected in series or in parallel.
The processor 3 outputs a scan signal Gn to the gate of the corresponding scan switch transistor T1 to control the scan switch transistor T1 to be turned on, and outputs a data signal Dn to the source of the turned-on scan switch transistor T1 to transmit the data signal Dn to the gate of the drive switch transistor T2 through the turned-on scan switch transistor T1, so as to control the on-state and on-state of the drive switch transistor T2, i.e. to make the drive switch transistor T2 be turned on at a certain on-state, so that the drive power supply Vpos can apply a corresponding drive voltage to the light emitting display device 2/oled D1 to control the light emitting display device 2/oled D1 to emit light.
An energy storage capacitor C2 is also connected between the source and the gate of the driving switch tube T2.
When the flexible touch display device 100 is bent, the capacitance value of the energy storage capacitor C2 changes, for example, the facing area of the energy storage capacitor C2 changes, which results in a change in the capacitance value of the energy storage capacitor C2. At this time, the change of the capacitance value of the energy storage capacitor C2 will cause the change of electrical parameters such as the voltage and/or current of the anode V + of the organic light emitting diode D1 connected to the driving switch tube T2.
As shown in fig. 9, the detecting unit 12 includes a detecting switch T3. In some embodiments, the detecting switch T3 is also a MOS transistor. The source of the detection switch tube T3 is electrically connected to the anode V + of the organic light emitting diode D1, the drain of the detection switch tube T3 forms a detection terminal T _ test, the gate of the detection switch tube T3 forms a scan terminal T _ scan, and the detection terminal T _ test and the scan terminal T _ scan are electrically connected to the processor 3.
The detecting unit 12 detects an electrical parameter of the light emitting display device 11 to generate a corresponding detecting signal, which specifically includes: the processor 3 controls the detection switch tube T3 to be turned on or off synchronously with the display maintaining stage and the display switching stage of the display screen according to the refresh frequency of the display screen, and the detection switch tube T3 sends a detection signal including the electrical parameter values of the light emitting display device 11/the organic light emitting diode D1 to the processor 3 when turned on. That is to say, the processor 3 controls the detecting unit 12 to enable and disable correspondingly according to the refresh frequency of the display frame and the display maintaining stage and the display switching stage of the display frame, so that the detecting unit 12 detects the electrical parameter of the corresponding light-emitting display device 11 in the display maintaining stage of the display frame, and does not detect the electrical parameter of the corresponding light-emitting display device 11 in the display switching stage of the display frame.
Specifically, the processor 3 controls to apply a conduction signal to the scan terminal T _ scan within the display sustain time of one frame of the display image to control the detection switch tube T3 to be continuously conducted, so as to obtain the detected detection signal through the detection terminal T _ test of the conducted detection switch tube T3. The processor 3 controls the detecting switch tube T3 to be turned off and not to detect within the switching time of the display frames, i.e. the time period from the end of one frame of display frame to the beginning of the display of the next frame of display frame.
Since the data signal for driving the oled D1 to display is generally kept unchanged during the display period of one frame of the display image, if there is no kink, the electrical parameter of the oled D1 will not change, and at this time, it can be effectively detected whether there is kink by detecting the change of the electrical parameter of the oled D1. When the display frame is switched, i.e. when the display frame is switched from one frame to another frame, the data signal for driving the oled D1 to display will also have a large change following the change of the display frame, and the detection will cause the inaccuracy.
Therefore, in the application, the switching time of the display picture is not detected, so that the misdetection can be effectively avoided, and the switching time of the display picture is very short relative to the continuous display time of the display picture, so that the misdetection can be equivalently always detected. And because the duration of the bending event is far longer than that of one frame of display picture, the bending event is ensured to be detected inevitably.
Therefore, in the present application, whether bending occurs is determined by detecting a change in an electrical parameter of the light emitting display device 11, and the touch unit 21 in the bending region that needs to be compensated can be accurately known, so that the corresponding touch unit 21 is compensated, and the touch performance of the bending region is improved.
As shown in fig. 10, which is a block diagram of a processor 3 in an embodiment, in some embodiments, the processor 3 includes a display controller 31 and a touch controller 32, the display controller 31 is connected to the scan switch T1 of each driving unit 13, and is configured to apply a corresponding driving signal to the corresponding scan switch T1 according to the display data of the current display frame, so as to drive the corresponding light-emitting display device 11 to emit light through the scan switch T1 and the driving switch T2 of the driving unit 13.
The display controller 31 is electrically connected to the scan terminal T _ scan formed by the gate of the detection switch tube T3 of each detection unit 12 and the detection terminal T _ test formed by the drain, and is configured to control the detection switch tube T3 to be turned on synchronously with the application of the scan signal Gn, and obtain the detection signal through the detection terminal T _ test to determine whether the variation of the electrical parameter meets a preset condition, and determine whether to bend, and when bending is determined, determine the coordinate position where bending occurs, and send the coordinate position where bending occurs to the touch controller 32, so that the touch controller 32 performs touch compensation on the corresponding touch unit 21.
In some embodiments, the display controller 31 and the touch controller 32 are two separate chips. The display controller 31 may be a display driving chip, and the touch controller 32 may be a touch control chip.
Obviously, in other embodiments, the processor 3 may also be an integrated chip, and has both the functions of the display controller 31 and the touch controller 32.
Referring back to fig. 2, the flexible touch display device 100 further includes a memory 4, and the memory 4 stores the display data of the image to be displayed, the first preset threshold, the second preset threshold, and the like.
The processor 3 may be a central processing unit, a microcontroller, a microprocessor, a single chip, a digital signal processor, etc., which are integrated with display control and touch control functions.
The memory 4 may be a memory card, a solid-state memory, a micro hard disk, an optical disk, or other computer-readable storage media. In some embodiments, the memory 4 stores program instructions that can be called by the processor 3 to perform the aforementioned functions.
The flexible touch display device 100 may be an AMOLED flexible display screen, a bendable mobile phone including the AMOLED flexible display screen, a tablet computer, a television, or the like.
Please refer to fig. 11, which is a flowchart illustrating a touch compensation method according to an embodiment of the invention. The touch compensation method is applied to the flexible touch display device 100, and the execution sequence of the method is not limited to the sequence shown in fig. 10. As mentioned above, the flexible touch display device 100 includes a plurality of light emitting display devices 11 arranged in an array, and a plurality of detecting units 12, and each detecting unit 12 is correspondingly connected to one of the light emitting display devices 11. The method comprises the following steps:
the electrical parameters of each light emitting display device 11 of the flexible touch display device 100 are detected by the detecting units 12 to generate corresponding detecting signals (S91). In some embodiments, the detecting units 12 are respectively enabled and disabled following the display maintaining phase and the display switching phase of the display frame, and detect the electrical parameters of the corresponding light emitting display device 11 in the display maintaining phase of the display frame, and do not detect the electrical parameters of the corresponding light emitting display device 11 in the display switching phase of the display frame.
Whether the electrical parameter of each light emitting display device 11 changes and whether the variation satisfies a predetermined condition are determined according to the detection signal generated by each detection unit 12 (S93). In some embodiments, the preset condition is that the variation is greater than a first preset threshold and smaller than a second preset threshold, and the determining whether the variation satisfies the preset condition includes: and judging whether the variation is larger than a first preset threshold and smaller than a preset threshold, if so, determining that the preset condition is met, and if not, determining that the preset condition is not met.
When the variation of the electrical parameter of the at least one light emitting display device 11 satisfies the preset condition, the at least one target pixel point P1 corresponding to the at least one light emitting display device 11 whose variation of the electrical parameter satisfies the preset condition is determined, and the at least one target touch unit 21 requiring compensation is determined according to the at least one target pixel point P1 (S95). Each pixel point P1 corresponds to a coordinate value, each touch unit 21 corresponds to a coordinate set, and the step S95 specifically includes: after the target pixel point P1 is determined, the touch unit 21 corresponding to the target pixel point P1 is determined to be a target touch unit according to the coordinate set to which the coordinate corresponding to the target pixel point P1 belongs.
Touch compensation is performed on the at least one target touch unit 21 (S97).
Please refer to fig. 12, which is a sub-flowchart of step S97 in some embodiments. In some embodiments, the step S97 includes the following steps.
A ratio of the number of the target pixel points P1 included in each touch unit 21 to the number of all the pixel points P1 in the touch unit 21 is determined (S971). In some embodiments, the step S971 includes: and determining the proportion of the number of the target pixel points P1 included in each touch unit 21 to the number of all the pixel points P1 in the touch unit 21 according to the proportion of the number of the coordinates of the target pixel points P1 included in each touch unit 21 to the number of the coordinates in the coordinate set corresponding to the touch unit 21.
Touch compensation is performed for each touch unit 21 according to the ratio (S972).
In some embodiments, each touch unit 21 is an area surrounded by two adjacent touch nodes J1, where the step S972 specifically includes: when the proportion of the area of a target pixel point P1 included in a certain touch unit 21 in the touch unit 21 exceeds a preset proportion, controlling to perform touch compensation on all touch nodes J1 of the touch unit 21; and when the proportion of the area of the target pixel point P1 included in a certain touch unit 21 in the touch unit 21 is smaller than the preset proportion, determining the bending center position of the touch unit 21, and compensating the touch node J1 of the touch unit 21 close to the bending center position.
Specifically, the "determining the bending center position of the touch unit 21" includes: and determining the bending center position of the touch unit 21 according to the coordinates of all target pixel points P1 in the touch unit 21 and the variation of the electrical parameter of the light-emitting display device 11 corresponding to each target pixel point P1.
Wherein, assuming that the coordinates of the bending center position C1 are (Xc1, Yc1), the processor 3 calculates the formula according to the X coordinate:
calculating the bending center positionX coordinate Xc1 of C1, wherein XpRefers to an X coordinate of a pth target pixel point P1 in the touch unit 21, and Δ Ep refers to an electrical parameter variation of the light emitting display device 11 corresponding to the pth target pixel point P1.
The processor 3 calculates a formula according to the Y coordinate:
calculating the Y coordinate Yc1 of the bending center position C1, wherein YpThe Y coordinate of the pth target pixel point P1 in the touch unit 21 is referred to, and Δ Ep refers to the electrical parameter variation of the light emitting display device 11 corresponding to the pth target pixel point P1.
The present invention may also provide a computer readable storage medium for storing program instructions for being called by the processor 3 to execute the steps of any of the aforementioned methods.
The computer readable storage medium is the aforementioned memory 4.
Therefore, according to the flexible touch display device 100 and the touch compensation method, the target pixel point P1 in the bending area is determined by detecting the change of the electrical parameter of the light-emitting display device 11, and the target touch unit 21 in the bending area and needing compensation is further determined according to the target touch unit 21 corresponding to the target pixel point P1 to compensate the target touch unit, so that the touch at any bending position can be well compensated, and the touch performance of the flexible touch display device 100 in the bending scene is improved.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (18)
1. A flexible touch display device, comprising:
the flexible display panel comprises a plurality of light-emitting display devices arranged in an array and a plurality of detection units, wherein each light-emitting display device is correspondingly and electrically connected with one detection unit, each light-emitting display device correspondingly forms a pixel point, and each detection unit is used for detecting the electrical parameters of the light-emitting display devices to generate corresponding detection signals;
the flexible touch panel is overlaid on the flexible display panel and comprises a plurality of touch units, and each touch unit corresponds to a plurality of pixel points; and
the processor is electrically connected with the plurality of detection units and the plurality of touch units and is used for receiving the detection signals generated by each detection unit, judging whether the electrical parameters of each light-emitting display device change or not and whether the variation quantity meets a preset condition or not according to the detection signals generated by each detection unit, determining at least one target pixel point corresponding to at least one light-emitting display device of which the variation quantity of the electrical parameters meets the preset condition when the variation quantity of the electrical parameters of at least one light-emitting display device meets the preset condition, determining a target touch unit needing compensation according to the at least one target pixel point and performing touch compensation on the target touch unit;
the processor performing touch compensation on the target touch unit comprises:
determining the proportion of the number of target pixel points included in each touch unit to the number of all pixel points included in the touch unit, and performing touch compensation on each touch unit according to the proportion.
2. The flexible touch display device according to claim 1, wherein each touch unit is an area defined by a plurality of adjacent touch nodes connected in pairs, and the processor is configured to control touch compensation to all touch nodes of a touch unit when a ratio of a number of target pixel points included in the touch unit to a number of all pixel points included in the touch unit exceeds a preset ratio; and when the ratio of the number of target pixel points included by a certain touch unit to the number of all pixel points included by the touch unit is smaller than the preset ratio, determining the bending center position of the touch unit, and compensating the touch nodes of the touch unit, the distance between which and the bending center position is smaller than the preset distance.
3. The flexible touch display device according to claim 2, wherein the processor determines the bending center position of the touch unit according to coordinates of all target pixel points in the touch unit and an electrical parameter variation of the light emitting display device corresponding to each target pixel point.
4. The flexible touch display device according to claim 1, wherein each pixel point corresponds to a coordinate value, each touch unit corresponds to a coordinate set, and after the processor determines a target pixel point, the processor determines the touch unit corresponding to the target pixel point as the target touch unit according to the coordinate set to which the coordinate corresponding to the target pixel point belongs.
5. The flexible touch display device according to claim 1, wherein the predetermined condition is that the variation is greater than a first predetermined threshold and less than a second predetermined threshold, the processor determines that the predetermined condition is satisfied when the processor determines that the variation is greater than the first predetermined threshold and less than the second predetermined threshold, and the processor determines that the predetermined condition is not satisfied when the processor determines that the variation is less than the first predetermined threshold or greater than the second predetermined threshold.
6. The flexible touch display device according to claim 1, wherein the flexible display panel further comprises a plurality of driving units, each driving unit is electrically connected to a light emitting display device and configured to drive the light emitting display device to display, the processor is connected to each of the plurality of driving units and configured to apply a corresponding driving signal to the corresponding driving unit according to display data of a current display image so as to drive the corresponding light emitting display device to emit light through the corresponding driving unit, and the plurality of light emitting display devices arranged in an array emit corresponding light to form a corresponding display image.
7. The flexible touch display device according to claim 6, wherein each driving unit comprises a scan switch and a driving switch, the driving switch is electrically connected between a driving power source, the scan switch and the corresponding light emitting display device, an energy storage capacitor is connected between a source and a gate of the driving switch, and the processor is electrically connected to the scan switch to apply the driving signal through the scan switch.
8. The flexible touch display device according to claim 7, wherein the light emitting display device comprises an organic light emitting diode, the detection unit comprises a detection switch tube, a source electrode of the detection switch tube is electrically connected to an anode of the organic light emitting diode, a drain electrode of the detection switch tube forms a detection terminal, a gate electrode of the detection switch tube forms a scanning terminal, the detection terminal and the scanning terminal are electrically connected to the processor, the processor controls the detection switch tube to be turned on or off synchronously with a display maintaining stage and a display switching stage of a display screen according to a refresh frequency of the display screen, and the detection switch tube transmits a detection signal including an electrical parameter value of the light emitting display device to the processor when the detection switch tube is turned on.
9. The flexible touch display device according to claim 8, wherein the processor controls the scanning end to apply a conduction signal to control the detection switch tube to be continuously conducted during a display sustain time of a frame of display image, so as to obtain the detected detection signal through the detection end of the conducted detection switch tube; and the processor controls the detection switch tube to be cut off within the switching time of the display picture, and does not carry out detection.
10. The flexible touch display device according to claim 1, wherein each pixel point corresponds to a coordinate value, each touch unit corresponds to a coordinate set, and the processor determines a ratio of the number of target pixel points included in each touch unit to the number of all pixel points included in the touch unit according to a ratio of the number of coordinates of a target pixel point included in each touch unit to the number of coordinates in the coordinate set corresponding to the touch unit.
11. A touch compensation method is applied to a flexible touch display device and is characterized in that the flexible touch display device comprises a plurality of luminous display devices arranged in an array and a plurality of detection units, and each detection unit is correspondingly connected with one luminous display device; the touch compensation method includes the steps of:
respectively detecting the electrical parameters of each light-emitting display device of the flexible touch display device through a plurality of detection units to generate corresponding detection signals; and
judging whether the electrical parameter of each light-emitting display device changes or not according to the detection signal generated by each detection unit and judging whether the variable quantity meets a preset condition or not;
when the variable quantity of the electrical parameter of at least one light-emitting display device is determined to meet a preset condition, determining at least one target pixel point corresponding to the at least one light-emitting display device with the variable quantity of the electrical parameter meeting the preset condition, and determining at least one target touch unit needing compensation according to the at least one target pixel point;
performing touch compensation on the at least one target touch unit;
the "touch compensating the at least one target touch unit" includes:
determining the proportion of the number of target pixel points included in each touch unit to the number of all pixel points included in the touch unit; and
and performing touch compensation on each touch unit according to the proportion.
12. The touch compensation method of claim 11, wherein each touch unit is an area surrounded by a plurality of adjacent touch nodes connected in pairs, and the "performing touch compensation on each touch unit according to the ratio" comprises:
when the ratio of the number of target pixel points included in a certain touch unit to the number of all pixel points included in the touch unit exceeds a preset ratio, controlling to perform touch compensation on all touch nodes of the touch unit; and
when the proportion of the number of target pixel points included by a certain touch unit to the number of all pixel points included by the touch unit is smaller than the preset proportion, determining the bending center position of the touch unit, and compensating the touch nodes of the touch unit, the distance between which and the bending center position is smaller than the preset distance.
13. The touch compensation method of claim 12, wherein the determining the bending center position of the touch unit comprises:
and determining the bending center position of the touch unit according to the coordinates of all target pixel points in the touch unit and the electrical parameter variation of the light-emitting display device corresponding to each target pixel point.
14. The touch compensation method of claim 13, wherein the step of determining the bending center position of the touch unit according to the coordinates of all target pixel points in the touch unit and the variation of the electrical parameter of the light emitting display device corresponding to each target pixel point comprises:
according to the X coordinate calculation formula:
calculating the X coordinate Xc1 of the bending center position, and according to the Y coordinate calculation formula:
and calculating a Y coordinate Yc1 of the bending center position, wherein xp is an X coordinate of a pth target pixel point in the touch unit 21, yp is a Y coordinate of a pth target pixel point in the touch unit, and Δ Ep is an electrical parameter variation of the light-emitting display device corresponding to the pth target pixel point.
15. The touch compensation method of claim 11, wherein the step of generating the corresponding detection signal by respectively detecting an electrical parameter of each light emitting display device of the flexible touch display device through a plurality of detection units comprises;
the detection units are correspondingly enabled and disabled along with the display maintaining stage and the display switching stage of the display picture, detect the electrical parameters of the corresponding light-emitting display device in the display maintaining stage of the display picture, and do not detect the electrical parameters of the corresponding light-emitting display device in the display switching stage of the display picture.
16. The touch compensation method of claim 11, wherein each pixel point corresponds to a coordinate value, each touch unit corresponds to a coordinate set, and the determining at least one target touch unit that needs to be compensated according to the at least one target pixel point comprises:
and after the target pixel point is determined, determining the touch unit corresponding to the target pixel point as a target touch unit according to the coordinate set to which the coordinate corresponding to the target pixel point belongs.
17. The touch compensation method of claim 11, wherein the preset condition is that the variation is greater than a first preset threshold and less than a second preset threshold, and the determining whether the variation satisfies the preset condition includes:
and judging whether the variation is larger than a first preset threshold and smaller than a preset threshold, if so, determining that the preset condition is met, and if not, determining that the preset condition is not met.
18. The touch compensation method of claim 11, wherein each pixel point corresponds to a coordinate value, each touch unit corresponds to a coordinate set, and the determining the ratio of the number of target pixels included in each touch unit to the number of all pixels included in the touch unit comprises:
and determining the proportion of the number of the target pixel points included in each touch unit to the number of all the pixel points included in the touch unit according to the proportion of the number of the coordinates of the target pixel points included in each touch unit to the number of the coordinates in the coordinate set corresponding to the touch unit.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2017/115886 WO2019113824A1 (en) | 2017-12-13 | 2017-12-13 | Flexible touch display device and touch compensation method |
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| CN111433835A CN111433835A (en) | 2020-07-17 |
| CN111433835B true CN111433835B (en) | 2022-03-29 |
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| CN201780097434.XA Active CN111433835B (en) | 2017-12-13 | 2017-12-13 | Flexible touch display device and touch compensation method |
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| CN (1) | CN111433835B (en) |
| TW (1) | TW201928636A (en) |
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| Publication number | Publication date |
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| WO2019113824A1 (en) | 2019-06-20 |
| CN111433835A (en) | 2020-07-17 |
| TW201928636A (en) | 2019-07-16 |
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