CN108062189B - Capacitance compensation module, method and touch display device - Google Patents

Capacitance compensation module, method and touch display device Download PDF

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Publication number
CN108062189B
CN108062189B CN201810060125.1A CN201810060125A CN108062189B CN 108062189 B CN108062189 B CN 108062189B CN 201810060125 A CN201810060125 A CN 201810060125A CN 108062189 B CN108062189 B CN 108062189B
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circuit
resistor
compensation
touch electrode
touch
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CN108062189A (en
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宗少雷
孙伟
孙继刚
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BOE Technology Group Co Ltd
Ordos Yuansheng Optoelectronics Co Ltd
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BOE Technology Group Co Ltd
Ordos Yuansheng Optoelectronics Co Ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)

Abstract

The invention provides a capacitance compensation module, a capacitance compensation method and a touch display device. The capacitance compensation module comprises a conversion circuit, a comparison circuit and a compensation circuit; the conversion circuit comprises a thermoelectric conversion sub-circuit, the comparison circuit comprises a thermoelectric voltage conversion sub-circuit, and the compensation circuit comprises a first compensation sub-circuit; and/or the conversion circuit comprises a photoelectric conversion sub-circuit, the comparison circuit comprises a photoelectric conversion sub-circuit, and the compensation circuit comprises a second compensation sub-circuit. The invention improves the phenomenon that the capacitance value of the touch electrode included in the touch display device is influenced by the ambient temperature and the illumination of the received light to deviate, and the performance of the touch electrode is reduced due to the change of the capacitance value.

Description

Capacitance compensation module, method and touch display device
Technical Field
The present invention relates to the field of capacitance compensation technologies, and in particular, to a capacitance compensation module, a capacitance compensation method, and a touch display device.
Background
As the use time increases, the temperature of the touch display device inevitably increases, and the illuminance of the light received by the touch display device is also different, which makes the actual use environment of the touch display device deviate from the standard environment. The change of the actual ambient temperature of the touch electrode and the illuminance of the received light of the touch display device inevitably causes the capacitance value of the touch electrode to deviate (when the actual ambient temperature of the touch electrode and the illuminance of the received light become high, the leakage current of the capacitance of the touch electrode becomes large, the capacitance value of the touch electrode is reduced, and when the actual ambient temperature of the touch electrode and the illuminance of the received light become low, the leakage current of the capacitance of the touch electrode becomes small, the capacitance value of the touch electrode is increased), so that the performance of the touch electrode is reduced, and the touch display device works in a non-ideal state.
Disclosure of Invention
The invention mainly aims to provide a capacitance compensation module, a capacitance compensation method and a touch display device, which solve the problem that in the prior art, the capacitance value of a touch electrode included in the touch display device is influenced by the ambient temperature and the illuminance of received light to deviate, and the performance of the touch electrode is reduced due to the change of the capacitance value.
In order to achieve the above objective, the present invention provides a capacitance compensation module applied to a touch display device, the capacitance compensation module includes a conversion circuit, a comparison circuit and a compensation circuit;
The conversion circuit comprises a thermoelectric conversion sub-circuit, the comparison circuit comprises a thermoelectric voltage conversion sub-circuit, and the compensation circuit comprises a first compensation sub-circuit; and/or the conversion circuit comprises a photoelectric conversion sub-circuit, the comparison circuit comprises a photoelectric conversion sub-circuit, and the compensation circuit comprises a second compensation sub-circuit;
the thermoelectric conversion sub-circuit is used for converting the actual ambient temperature of a touch electrode layer included in a touch display panel in the touch display device into corresponding actual thermal voltage;
the thermal voltage conversion sub-circuit is connected with the thermal voltage conversion sub-circuit and is used for comparing the actual thermal voltage with a preset standard thermal voltage so as to generate a first compensation control signal;
The first compensation sub-circuit is connected with the thermal voltage conversion sub-circuit and is used for adjusting the voltage value of a touch scanning voltage signal transmitted to a touch electrode included in the touch electrode layer according to the first compensation control signal so as to adjust the capacitance value of the touch electrode;
The photoelectric conversion sub-circuit is used for converting the actual illuminance of the light received by the touch electrode layer included in the touch display panel into corresponding actual photovoltage;
the photoelectric conversion sub-circuit is connected with the photoelectric conversion sub-circuit and is used for comparing the actual photoelectric voltage with a preset standard photoelectric voltage so as to generate a second compensation control signal;
The second compensation sub-circuit is connected with the photovoltage conversion sub-circuit and is used for adjusting the voltage value of a touch scanning voltage signal transmitted to the touch electrode included in the touch electrode layer according to the second compensation control signal so as to adjust the capacitance value of the touch electrode.
In practice, the thermoelectric conversion sub-circuit comprises a thermistor and a first thermoelectric resistor; the thermoelectric comparison sub-circuit comprises a first subtractor;
the first end of the thermistor is connected with the ground, and the second end of the thermistor is connected with the inverting input end of the first subtracter; the first end of the first thermoelectric resistor is connected with the second end of the thermistor, and the second end of the first thermoelectric resistor is connected with a power supply voltage;
The non-inverting input end of the first subtracter is connected with the standard thermal voltage; the output end of the first subtracter is connected with the first compensation sub-circuit; the first subtracter outputs the first compensation control signal through an output end of the first subtracter;
The thermistor, the first thermoelectric resistor and the first subtracter are arranged on a display substrate included in the touch display panel, and the thermistor is arranged corresponding to at least one touch electrode included in the touch electrode layer; or the thermistor, the first thermoelectric resistor and the first subtracter are arranged on a driving circuit board included in the touch display device, and the driving circuit board is arranged on the side edge of the touch display panel;
The first compensation sub-circuit is arranged on the driving circuit board.
In practice, the first subtractor comprises a first operational amplifier, a second thermoelectric resistor, a third thermoelectric resistor, a fourth thermoelectric resistor and a fifth thermoelectric resistor, wherein,
The non-inverting input end of the first operational amplifier is respectively connected with the first end of the second thermoelectric resistor and the first end of the third thermoelectric resistor; the second end of the second thermoelectric resistor is connected with the ground end, and the second end of the third thermoelectric resistor is connected with the standard thermal voltage;
the inverting input end of the first operational amplifier is respectively connected with the first end of the fourth thermoelectric resistor and the first end of the fifth thermoelectric resistor; the second end of the fourth thermoelectric resistor is connected with the second end of the thermistor, and the second end of the fifth thermoelectric resistor is connected with the output end of the first operational amplifier; the output end of the first operational amplifier is the output end of the first subtracter;
The resistance value of the second thermoelectric resistor is equal to the resistance value of the third thermoelectric resistor, and the resistance value of the fourth thermoelectric resistor is equal to the resistance value of the fifth thermoelectric resistor.
In implementation, the photoelectric conversion sub-circuit comprises a photoresistor and a first photoelectric resistor; the photoelectric comparison sub-circuit comprises a second subtracter;
The first end of the photoresistor is connected with the ground, and the second end of the photoresistor is connected with the inverting input end of the second subtracter; the first end of the first photoelectric resistor is connected with the second end of the photosensitive resistor, and the second end of the first photoelectric resistor is connected with a power supply voltage;
the non-inverting input end of the second subtracter is connected with the standard photovoltage;
the output end of the second subtracter is connected with the second compensation sub-circuit; the second subtracter outputs the second compensation control signal through an output end of the second subtracter;
the photoresistor, the first photoelectric resistor and the second subtracter are arranged on a display substrate included in the touch display panel, and the photoresistor is arranged corresponding to at least one touch electrode included in the touch electrode layer; or the photoresistor, the first photoelectric resistor and the second subtracter are arranged on a driving circuit board included in the touch display device, and the driving circuit board is arranged on the side edge of the touch display panel;
the second compensation sub-circuit is arranged on the driving circuit board.
In practice, the second subtractor comprises a second operational amplifier, a second photoelectric resistor, a third photoelectric resistor, a fourth photoelectric resistor and a fifth photoelectric resistor, wherein,
The non-inverting input end of the second operational amplifier is respectively connected with the first end of the second photoelectric resistor and the first end of the third photoelectric resistor; the second end of the second photoelectric resistor is connected with the ground end, and the second end of the third photoelectric resistor is connected with the standard photovoltage;
The inverting input end of the second operational amplifier is respectively connected with the first end of the fourth photoelectric resistor and the first end of the fifth photoelectric resistor; the second end of the fourth photoelectric resistor is connected with the second end of the photosensitive resistor, and the second end of the fifth photoelectric resistor is connected with the output end of the second operational amplifier; the output end of the second operational amplifier is the output end of the second subtracter;
the resistance value of the second photoelectric resistor is equal to the resistance value of the third photoelectric resistor, and the resistance value of the fourth photoelectric resistor is equal to the resistance value of the fifth photoelectric resistor.
The invention also provides a capacitance compensation method which is applied to the capacitance compensation module and comprises the following steps: performing a first compensation step; and/or performing a second compensation step;
the first compensation step includes:
The thermoelectric conversion sub-circuit is used for converting the actual ambient temperature of a touch electrode layer included in a touch display panel in the touch display device into corresponding actual thermal voltage;
the thermal voltage conversion sub-circuit compares the actual thermal voltage with a preset standard thermal voltage to generate a first compensation control signal;
the first compensation sub-circuit adjusts the voltage value of a touch scanning voltage signal transmitted to a touch electrode included in the touch electrode layer according to the first compensation control signal so as to adjust the capacitance value of the touch electrode;
The second compensation step includes:
The photoelectric conversion sub-circuit converts the actual illuminance of the light received by the touch electrode layer included in the touch display panel into corresponding actual light voltage;
The photovoltage conversion sub-circuit compares the actual photovoltage with a preset standard photovoltage to generate a second compensation control signal;
the second compensation sub-circuit adjusts the voltage value of the touch scanning voltage signal transmitted to the touch electrode included in the touch electrode layer according to the second compensation control signal so as to adjust the capacitance value of the touch electrode.
In implementation, the step of adjusting, by the first compensation sub-circuit, the voltage value of the touch scan voltage signal transmitted to the touch electrode included in the touch electrode layer according to the first compensation control signal includes:
when the first compensation control signal indicates that the actual thermal voltage is smaller than the standard thermal voltage, the first compensation sub-circuit controls to increase the voltage value of the touch scanning voltage signal;
when the first compensation control signal indicates that the actual thermal voltage is larger than the standard thermal voltage, the first compensation sub-circuit controls to reduce the voltage value of the touch scanning voltage signal;
The step of adjusting the voltage value of the touch scanning voltage signal transmitted to the touch electrode included in the touch electrode layer by the second compensation sub-circuit according to the second compensation control signal includes:
When the second compensation control signal indicates that the actual photovoltage is smaller than the standard photovoltage, the second compensation sub-circuit controls the voltage value of the touch scanning voltage signal to be adjusted;
When the second compensation control signal indicates that the actual photovoltage is greater than the standard photovoltage, the second compensation sub-circuit controls to reduce the voltage value of the touch scanning voltage signal.
The invention also provides a touch display device, which comprises a touch display panel and the capacitance compensation module;
The capacitance compensation module is used for adjusting the capacitance value of the touch electrode included in the touch electrode layer according to the actual ambient temperature of the touch electrode layer included in the touch display panel and/or the actual illuminance of the light received by the touch electrode layer.
When the touch display device is implemented, the touch display device further comprises a driving circuit board, wherein the driving circuit board is arranged on the side edge of the touch display panel;
The capacitance compensation module comprises a thermoelectric conversion sub-circuit, wherein the thermoelectric conversion sub-circuit comprises a thermistor and a first thermoelectric resistor; the thermoelectric conversion sub-circuit includes a first subtractor; the compensation circuit in the capacitance compensation module comprises a first compensation sub-circuit arranged on the driving circuit board; the thermistor, the first thermoelectric resistor and the first subtracter are arranged on a display substrate included in the touch display panel, and the thermistor is arranged corresponding to at least one touch electrode included in the touch electrode layer; or the thermistor, the first thermoelectric resistor and the first subtracter are arranged on the driving circuit board; and/or the number of the groups of groups,
The capacitance compensation module comprises a photoelectric conversion sub-circuit, wherein the photoelectric conversion sub-circuit comprises a photoresistor and a first photoelectric resistor; the photoelectric conversion sub-circuit includes a second subtractor; the compensation circuit in the capacitance compensation module comprises a second compensation sub-circuit arranged on the driving circuit board; the photoresistor, the first photoelectric resistor and the second subtracter are arranged on a display substrate included in the touch display panel, and the photoresistor is arranged corresponding to at least one touch electrode included in the touch electrode layer; or the photoresistor, the first photoelectric resistor and the second subtracter are arranged on the driving circuit board.
When in implementation, the touch display panel comprises a backlight source, a driving array layer and a touch electrode layer which are arranged on the display substrate;
The thermistor, the first thermoelectric resistor and the first subtracter are specifically arranged on the surface of the touch display panel; the thermistor, the first thermoelectric resistor and the first subtracter are specifically arranged between the backlight source and the driving array layer; or the thermistor, the first thermoelectric resistor and the first subtracter are specifically arranged on the surface of the touch electrode layer;
The photoresistor, the first photoelectric resistor and the second subtracter are specifically arranged on the surface of the touch display panel; the photoresistor, the first photoelectric resistor and the second subtracter are specifically arranged between the backlight source and the driving array layer; or the photoresistor, the first photoelectric resistor and the second subtracter are specifically arranged on the surface of the touch electrode layer.
Compared with the prior art, the capacitance compensation module, the method and the touch display device can convert the actual ambient temperature of the touch electrode layer and/or the actual illuminance of light received by the touch electrode layer into corresponding voltages, then compare the voltages with standard voltages, and adjust the voltage value of a touch scanning voltage signal transmitted to the touch electrode included in the touch electrode layer according to the comparison result so as to adjust the capacitance value of the touch electrode, so that capacitance compensation of the touch electrode can be realized, offset of the capacitance value due to the influence of ambient temperature and illuminance of received light is avoided, and the phenomenon of performance degradation of the touch electrode due to capacitance value change is improved, so that the touch electrode works in an ideal state.
Drawings
FIG. 1 is a block diagram of a first embodiment of a capacitive compensation module according to the present invention;
FIG. 2 is a block diagram of a second embodiment of a capacitive compensation module according to the present invention;
FIG. 3 is a block diagram of a third embodiment of a capacitance compensation module according to the present invention;
FIG. 4 is a block diagram of a fourth embodiment of a capacitive compensation module according to the present invention;
FIG. 5 is a block diagram of a fifth embodiment of a capacitance compensation module according to the present invention;
Fig. 6 is a circuit diagram of a sixth embodiment of the capacitance compensation module according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The capacitance compensation module provided by the embodiment of the invention is applied to a touch display device, and comprises a conversion circuit, a comparison circuit and a compensation circuit;
The conversion circuit comprises a thermoelectric conversion sub-circuit, the comparison circuit comprises a thermoelectric voltage conversion sub-circuit, and the compensation circuit comprises a first compensation sub-circuit; and/or the conversion circuit comprises a photoelectric conversion sub-circuit, the comparison circuit comprises a photoelectric conversion sub-circuit, and the compensation circuit comprises a second compensation sub-circuit;
the thermoelectric conversion sub-circuit is used for converting the actual ambient temperature of a touch electrode layer included in a touch display panel in the touch display device into corresponding actual thermal voltage;
the thermal voltage conversion sub-circuit is connected with the thermal voltage conversion sub-circuit and is used for comparing the actual thermal voltage with a preset standard thermal voltage so as to generate a first compensation control signal;
The first compensation sub-circuit is connected with the thermal voltage conversion sub-circuit and is used for adjusting the voltage value of a touch scanning voltage signal transmitted to a touch electrode included in the touch electrode layer according to the first compensation control signal so as to adjust the capacitance value of the touch electrode;
The photoelectric conversion sub-circuit is used for converting the actual illuminance of the light received by the touch electrode layer included in the touch display panel into corresponding actual photovoltage;
the photoelectric conversion sub-circuit is connected with the photoelectric conversion sub-circuit and is used for comparing the actual photoelectric voltage with a preset standard photoelectric voltage so as to generate a second compensation control signal;
The second compensation sub-circuit is connected with the photovoltage conversion sub-circuit and is used for adjusting the voltage value of a touch scanning voltage signal transmitted to the touch electrode included in the touch electrode layer according to the second compensation control signal so as to adjust the capacitance value of the touch electrode.
The capacitance compensation module comprises a conversion circuit, a comparison circuit and a compensation circuit, wherein the conversion circuit comprises a thermoelectric conversion sub-circuit and/or a photoelectric conversion sub-circuit, the comparison circuit comprises a thermoelectric conversion sub-circuit and/or a photoelectric conversion sub-circuit, and the compensation circuit comprises a first compensation sub-circuit and/or a second compensation sub-circuit.
In particular implementations, the standard thermal voltage corresponds to a predetermined set standard ambient temperature; the standard thermal voltage is equal to the voltage obtained by the thermoelectric conversion sub-circuit according to the standard ambient temperature; the standard ambient temperature can be selected according to actual conditions, and the working performance of the touch electrode is good under the standard ambient temperature.
In specific implementation, the standard photovoltage corresponds to preset standard illuminance; the standard light voltage is equal to the voltage obtained by the photoelectric conversion sub-circuit according to the standard illumination, the standard illumination can be selected according to actual conditions, and when the illumination of the light received by the touch electrode layer is equal to the standard illumination, the working performance of the touch electrode is good.
As shown in fig. 1, a first embodiment of the capacitive compensation module according to the present invention is applied to a touch display device, and the first embodiment of the capacitive compensation module according to the present invention includes a conversion circuit, a comparison circuit and a compensation circuit;
The conversion circuit comprises a thermoelectric conversion sub-circuit 11, the comparison circuit comprises a thermoelectric voltage conversion sub-circuit 21, and the compensation circuit comprises a first compensation sub-circuit 31;
the thermoelectric conversion sub-circuit 11 is configured to convert an actual ambient temperature of a touch electrode layer included in a touch display panel in the touch display device into a corresponding actual thermal voltage V1;
The thermal voltage conversion sub-circuit 21 is connected to the thermal voltage conversion sub-circuit 11, and is configured to compare the actual thermal voltage V1 with a preset standard thermal voltage Vf1 to generate a first compensation control signal S1;
the first compensation sub-circuit 31 is configured to adjust a voltage value of a touch scan voltage signal transmitted to a touch electrode (not shown in fig. 1) included in the touch electrode layer according to the first compensation control signal S1, so as to adjust a capacitance value of the touch electrode.
The first embodiment of the capacitance compensation module shown in fig. 1 includes a thermoelectric conversion sub-circuit 11, a thermoelectric voltage conversion sub-circuit 21 and a first compensation sub-circuit 31, and adjusts the voltage value of the touch scan voltage signal transmitted to the touch electrode according to the actual ambient temperature of the touch electrode layer, so as to adjust the capacitance value of the touch electrode.
As shown in fig. 2, a second embodiment of the capacitance compensation module according to the present invention is applied to a touch display device, and the second embodiment of the capacitance compensation module according to the present invention includes a conversion circuit, a comparison circuit and a compensation circuit;
the conversion circuit comprises a photoelectric conversion sub-circuit 12, the comparison circuit comprises a photoelectric conversion sub-circuit 22, and the compensation circuit comprises a second compensation sub-circuit 32;
The photoelectric conversion sub-circuit 12 is configured to convert an actual illuminance of light received by a touch electrode layer included in a touch display panel in the touch display device into a corresponding actual photovoltage V2;
The photovoltage conversion sub-circuit 22 is connected to the photoelectric conversion sub-circuit 12, and is configured to compare the actual photovoltage V2 with a preset standard photovoltage Vf2 to generate a second compensation control signal S2;
The second compensation sub-circuit 32 is configured to adjust a voltage value of a touch scan voltage signal transmitted to a touch electrode (not shown in fig. 2) included in the touch electrode layer according to the second compensation control signal S2, so as to adjust a capacitance value of the touch electrode.
The second embodiment of the capacitance compensation module shown in fig. 2 includes a photoelectric conversion sub-circuit 12, a photovoltaic conversion sub-circuit 22 and a second compensation sub-circuit 32, and adjusts the voltage value of the touch scan voltage signal transmitted to the touch electrode according to the actual illuminance of the light received by the touch electrode layer, so as to adjust the capacitance value of the touch electrode.
As shown in fig. 3, a third embodiment of the capacitance compensation module according to the present invention is applied to a touch display device, and the third embodiment of the capacitance compensation module according to the present invention includes a conversion circuit 10, a comparison circuit 20 and a compensation circuit 30;
the conversion circuit 10 includes a thermoelectric conversion sub-circuit 11 and a photoelectric conversion sub-circuit 21, the comparison circuit 20 includes a thermoelectric voltage conversion sub-circuit 21 and a photoelectric conversion sub-circuit 22, and the compensation circuit 30 includes a first compensation sub-circuit 31 and a second compensation sub-circuit 32;
the thermoelectric conversion sub-circuit 11 is configured to convert an actual ambient temperature of a touch electrode layer included in a touch display panel in the touch display device into a corresponding actual thermal voltage V1;
The photoelectric conversion sub-circuit 12 is configured to convert an actual illuminance of light received by a touch electrode layer included in a touch display panel in the touch display device into a corresponding actual photovoltage V2;
The thermal voltage conversion sub-circuit 21 is connected to the thermal voltage conversion sub-circuit 11, and is configured to compare the actual thermal voltage V1 with a preset standard thermal voltage Vf1 to generate a first compensation control signal S1;
The photovoltage conversion sub-circuit 22 is connected to the photoelectric conversion sub-circuit 12, and is configured to compare the actual photovoltage V2 with a preset standard photovoltage Vf2 to generate a second compensation control signal S2;
the first compensation sub-circuit 31 is configured to adjust a voltage value of a touch scan voltage signal transmitted to a touch electrode (not shown in fig. 3) included in the touch electrode layer according to the first compensation control signal S1, so as to adjust a capacitance value of the touch electrode;
the second compensation sub-circuit 32 is configured to adjust a voltage value of a touch scan voltage signal transmitted to a touch electrode (not shown in fig. 3) included in the touch electrode layer according to the second compensation control signal S2, so as to adjust a capacitance value of the touch electrode.
In a third embodiment of the capacitance compensation module shown in fig. 3, the compensation circuit is configured to adjust a voltage value of a touch scan voltage signal transmitted to a touch electrode (not shown in fig. 3) included in the touch electrode layer according to the first compensation control signal and the second compensation control signal.
The third embodiment of the capacitance compensation module shown in fig. 3 includes a thermoelectric conversion sub-circuit 11, a thermoelectric voltage conversion sub-circuit 21, a first compensation sub-circuit 31, a photoelectric conversion sub-circuit 12, a photovoltaic conversion sub-circuit 22, and a second compensation sub-circuit 32, and adjusts the voltage value of a touch scanning voltage signal transmitted to the touch electrode according to the actual ambient temperature of the touch electrode layer and the actual illuminance of the light received by the touch electrode layer, so as to adjust the capacitance value of the touch electrode.
Specifically, in a fourth embodiment of the capacitance compensation module according to the present invention, as shown in fig. 4, based on the first embodiment of the capacitance compensation module shown in fig. 1, the thermoelectric conversion sub-circuit 11 may include a thermistor Rt and a first thermistor Rth1; the thermoelectric comparison Sub-circuit 21 includes a first subtractor Sub1;
A first end of the thermistor Rt is connected with a ground end GND, and a second end of the thermistor Rt is connected with an inverting input end of the first subtracter Sub 1; a first end of the first thermoelectric resistor Rth1 is connected with a second end of the thermistor Rt1, and a second end of the first thermoelectric resistor Rth1 is connected with a power supply voltage VCC; in actual operation, the power supply voltage VCC may be a positive voltage, but is not limited thereto;
the non-inverting input end of the first subtracter Sub1 is connected with the standard thermal voltage Vf1;
The output end of the first subtracter Sub1 is connected with the first compensation Sub-circuit 31; the first subtracter Sub1 outputs a first compensation control signal through an output end thereof;
The thermistor Rt, the first thermoelectric resistor Rth1 and the first subtractor Sub1 may be disposed on a display substrate included in the touch display panel, where the thermistor Rt is disposed corresponding to at least one touch electrode included in the touch electrode layer; or the thermistor Rt, the first thermoelectric resistor Rth1 and the first subtracter Sub1 are arranged on a driving circuit board included in the touch display device, and the driving circuit board is arranged on the side edge of the touch display panel;
the first compensation sub-circuit 31 may be disposed on the driving circuit board.
In a fourth embodiment of the capacitance compensation module shown in fig. 4, the resistance value of the thermistor Rt varies with the temperature of Rt; when the temperature becomes high, the resistance of Rt becomes small; when the temperature becomes low, the resistance of Rt becomes large;
Assuming that the standard ambient temperature is T0 and the resistance value of Rt at the standard ambient temperature T0 is equal to r01, vf1 is equal to (r01×vcc)/(r01+r11), where r11 is the resistance value of Rth 1.
In operation, according to a fourth embodiment of the capacitance compensation module shown in fig. 4, a voltage value of a voltage signal output by an output end of the first subtractor Sub1 is equal to Vf1-V1, and the voltage signal output by the first subtractor Sub1 is a first compensation control signal; when the voltage value is smaller than 0, the first compensation control signal indicates that the actual ambient temperature of the touch electrode layer is smaller than the standard ambient temperature (if the capacitance value of the touch electrode is not compensated, the capacitance value of the touch electrode will be larger than the ideal capacitance value), and the first compensation sub-circuit 31 controls to reduce the voltage value of the touch scanning voltage signal output to the touch electrode so as to reduce the capacitance value of the touch electrode;
When the voltage value is greater than 0, the first compensation control signal indicates that the actual ambient temperature of the touch electrode layer is greater than the standard ambient temperature (if the capacitance value of the touch electrode is not compensated, the capacitance value of the touch electrode will be smaller than the ideal capacitance value at this time), and the first compensation sub-circuit 31 controls to increase the voltage value of the touch scan voltage signal output to the touch electrode so as to increase the capacitance value of the touch electrode.
In actual operation, when the actual ambient temperature of the touch electrode is less than the standard ambient temperature, the leakage current of the capacitance of the touch electrode is reduced, the capacitance value of the touch electrode is larger than the ideal capacitance value of the touch electrode, and the first compensation sub-circuit 31 needs to control to reduce the voltage value of the touch scanning voltage signal output to the touch electrode so as to reduce the capacitance value of the touch electrode;
When the actual ambient temperature of the touch electrode is greater than the standard ambient temperature, the leakage current of the capacitance of the touch electrode increases, the capacitance value of the touch electrode is smaller than the ideal capacitance value of the touch electrode, and the compensation sub-circuit 31 needs to control to increase the voltage value of the touch scanning voltage signal output to the touch electrode so as to increase the capacitance value of the touch electrode.
According to a specific embodiment, the first subtractor may include a first operational amplifier, a second thermoelectric resistor, a third thermoelectric resistor, a fourth thermoelectric resistor, and a fifth thermoelectric resistor, wherein,
The non-inverting input end of the first operational amplifier is respectively connected with the first end of the second thermoelectric resistor and the first end of the third thermoelectric resistor; the second end of the second thermoelectric resistor is connected with the ground end, and the second end of the third thermoelectric resistor is connected with the standard thermal voltage; the resistance value of the second thermoelectric resistor is equal to the resistance value of the third thermoelectric resistor;
The inverting input end of the first operational amplifier is respectively connected with the first end of the fourth thermoelectric resistor and the first end of the fifth thermoelectric resistor; the second end of the fourth thermoelectric resistor is connected with the second end of the thermistor, and the second end of the fifth thermoelectric resistor is connected with the output end of the first operational amplifier; the resistance value of the fourth thermoelectric resistor is equal to the resistance value of the third thermoelectric resistor;
The output end of the first operational amplifier is the output end of the first subtracter.
Specifically, in a fifth embodiment of the capacitance compensation module according to the present invention, as shown in fig. 5, based on the first embodiment of the capacitance compensation module shown in fig. 2, the photoelectric conversion sub-circuit 21 includes a photo resistor Rp and a first photo resistor Rph1; the photoelectric comparison Sub-circuit 22 includes a second subtractor Sub2;
the first end of the photo resistor Rp is connected with the ground end GND, and the second end of the photo resistor Rp is connected with the inverting input end of the second subtracter Sub; a first end of the first photo resistor Rph is connected to a second end of the photo resistor Rp, and a second end of the first photo resistor Rph is connected to a power supply voltage VCC; in actual operation, VCC may be a positive voltage, but is not limited thereto;
The non-inverting input end of the second subtracter Sub2 is connected with the standard light voltage Vf2;
The photo resistor Rp, the first photo resistor Rph and the second subtractor Sub2 are disposed on a display substrate included in the touch display panel, where the photo resistor Rp is disposed corresponding to at least one touch electrode included in the touch electrode layer; or the photo resistor Rp, the first photo resistor Rph and the second subtractor Sub2 are arranged on a driving circuit board included in the touch display device, and the driving circuit board is arranged on the side edge of the touch display panel;
the second compensation sub-circuit 32 may be disposed on the driving circuit board.
In a fifth embodiment of the capacitance compensation module shown in fig. 5, the resistance value of the photo resistor Rp changes with the illuminance of the light received by Rp; when the illuminance becomes high, the resistance of Rp becomes small; when the illuminance becomes low, the resistance of Rp becomes large;
Assuming that the standard illuminance is Lum0 and the resistance value of Rp when the illuminance of the received light is the standard illuminance Lum0 is equal to r02, vf2 is equal to (r02×vcc)/(r02+r21), where r21 is the resistance value of Rph.
In operation, according to a fifth embodiment of the capacitance compensation module shown in fig. 5, the voltage value of the voltage signal output by the output end of the second subtracter Sub2 is equal to Vf2-V2, and the voltage signal output by the second subtracter Sub2 is the second compensation control signal; when the voltage value is smaller than 0, the second compensation control signal indicates that the actual illuminance of the light received by the touch electrode layer is smaller than the standard illuminance (if the capacitance value of the touch electrode is not compensated, the capacitance value of the touch electrode will be larger than the ideal capacitance value at this time), and the second compensation sub-circuit 32 controls to reduce the voltage value of the touch scanning voltage signal output to the touch electrode so as to reduce the capacitance value of the touch electrode;
When the voltage value is greater than 0, the second compensation control signal indicates that the actual illuminance of the light received by the touch electrode layer is greater than the standard illuminance (if the capacitance value of the touch electrode is not compensated, the capacitance value of the touch electrode will be smaller than the ideal capacitance value at this time), and the second compensation sub-circuit 32 controls to increase the voltage value of the touch scan voltage signal output to the touch electrode so as to increase the capacitance value of the touch electrode.
In actual operation, when the actual illuminance of the light received by the touch electrode layer is smaller than the standard illuminance, the leakage current of the touch electrode capacitor is reduced, the capacitance value of the touch electrode is larger than the ideal touch electrode capacitance value, and the second compensation sub-circuit 32 needs to control to reduce the voltage value of the touch scanning voltage signal output to the touch electrode so as to reduce the capacitance value of the touch electrode;
When the actual illuminance of the light received by the touch electrode layer is greater than the leakage current of the capacitance of the touch electrode with standard illuminance, the capacitance value of the touch electrode is smaller than the ideal capacitance value of the touch electrode, and the second compensation sub-circuit 32 needs to control to increase the voltage value of the touch scanning voltage signal output to the touch electrode so as to increase the capacitance value of the touch electrode.
According to a specific embodiment, the second subtractor may include a second operational amplifier, a second photo resistor, a third photo resistor, a fourth photo resistor, and a fifth photo resistor, wherein,
The non-inverting input end of the second operational amplifier is respectively connected with the first end of the second photoelectric resistor and the first end of the third photoelectric resistor; the second end of the second photoelectric resistor is connected with the ground end, and the second end of the third photoelectric resistor is connected with the standard photovoltage; the resistance value of the second photoelectric resistor is equal to the resistance value of the third photoelectric resistor;
The inverting input end of the second operational amplifier is respectively connected with the first end of the fourth photoelectric resistor and the first end of the fifth photoelectric resistor; the second end of the fourth photoelectric resistor is connected with the second end of the photosensitive resistor, and the second end of the fifth photoelectric resistor is connected with the output end of the second operational amplifier; the resistance value of the fourth photoelectric resistor is equal to the resistance value of the fifth photoelectric resistor;
The output end of the second operational amplifier is the output end of the second subtracter.
As shown in fig. 6, a sixth embodiment of the capacitance compensation module according to the present invention is applied to a touch display device, and the sixth embodiment of the capacitance compensation module according to the present invention includes a conversion circuit, a comparison circuit and a compensation circuit;
The conversion circuit includes a thermoelectric conversion sub-circuit 11 and a photoelectric conversion sub-circuit 12, the comparison circuit includes a thermoelectric voltage conversion sub-circuit 21 and a photoelectric voltage conversion sub-circuit 22, and the compensation circuit includes a first compensation sub-circuit 31 and a second compensation sub-circuit 32;
The thermoelectric conversion sub-circuit 11 includes a thermistor Rt and a first thermistor Rth1; the thermoelectric comparison Sub-circuit comprises a first subtracter Sub1; the first subtracter Sub1 comprises a first operational amplifier OP1, a second thermoelectric resistor Rth2, a third thermoelectric resistor Rth3, a fourth thermoelectric resistor Rth4 and a fifth thermoelectric resistor Rth5;
The first end of the thermistor Rt is connected with the ground end GND; a first end of the first thermoelectric resistor Rth1 is connected with a second end of the thermistor Rt, and a second end of the first thermoelectric resistor Rth1 is connected with a power supply voltage VCC;
the first subtractor Sub1 includes a first operational amplifier Op1, a second thermistor Rth2, a third thermistor Rth3, a fourth thermistor Rth4, and a fifth thermistor Rth5, wherein,
The non-inverting input end of the first operational amplifier OP1 is respectively connected with the first end of the second thermoelectric resistor Rth2 and the first end of the third thermoelectric resistor Rth 3; the second end of the second thermoelectric resistor Rth2 is connected with the ground end GND, and the second end of the third thermoelectric resistor Rth3 is connected to the standard thermal voltage Vf1;
The inverting input end of the first operational amplifier OP1 is connected to the first end of the fourth thermistor Rth4 and the first end of the fifth thermistor Rth5 respectively; a second end of the fourth thermoelectric resistor Rth4 is connected with a second end of the thermistor Rt, and a second end of the fifth thermoelectric resistor Rth5 is connected with an output end of the first operational amplifier OP 1; the voltage of the second end of the thermistor Rt is the actual thermal voltage V1;
the resistance value of the second thermoelectric resistor Rth2 is equal to the resistance value of the third thermoelectric resistor Rth3, and the resistance value of the fourth thermoelectric resistor Rth4 is equal to the resistance value of the fifth thermoelectric resistor Rth 5;
The voltage value of the voltage signal output by the output end of the first operational amplifier OP1 is equal to delta V1, and delta V1 is equal to Vf1-V1; the voltage signal is a first compensation control signal;
The first compensation sub-circuit 31 is connected to the output end of the first operational amplifier OP1, and is configured to adjust a voltage value of a touch scan voltage signal transmitted to a touch electrode included in the touch electrode layer according to the first compensation control signal, so as to adjust a capacitance value of the touch electrode;
In the specific implementation, the capacitance offset DeltaF 1 of the touch electrode corresponding to different DeltaV 1 can be actually tested at the touch display panel end, and the offset DeltaF 1 is processed and stored, so that the voltage value of the touch scanning voltage signal transmitted to the touch electrode can be adjusted according to DeltaV 1, and the capacitance value of the touch electrode can be further adjusted;
Specifically, when the voltage value of the touch scanning voltage signal is adjusted to be high, the capacitance value of the touch electrode is increased, and when the voltage value of the touch scanning voltage signal is adjusted to be low, the capacitance value of the touch electrode is reduced;
the photoelectric conversion sub-circuit 12 includes a photo resistor Rp and a first photo resistor Rph1; the photoelectric comparison Sub-circuit 22 includes a second subtractor Sub2;
The first end of the photoresistor Rp is connected with the ground GND; a first end of the first photo resistor Rph is connected to a second end of the photo resistor Rp, and a second end of the first photo resistor Rph is connected to a power supply voltage VCC; the power supply voltage may be a positive voltage, but is not limited in sequence;
The second subtractor Sub2 includes a second operational amplifier OP2, a second photo resistor Rph, a third photo resistor Rph3, a fourth photo resistor Rph, and a fifth photo resistor Rph, wherein,
The non-inverting input end of the second operational amplifier OP2 is connected to the first end of the second photo resistor Rph and the first end of the third photo resistor Rph respectively; the second end of the second photo resistor Rph is connected with the ground GND, and the second end of the third photo resistor Rph3 is connected to the standard light voltage Vf2;
The inverting input terminal of the second operational amplifier OP2 is connected to the first terminal of the fourth photo resistor Rph and the first terminal of the fifth photo resistor Rph, respectively; a second end of the fourth photo resistor Rph is connected to the second end of the light sensing resistor Rp, and a second end of the fifth photo resistor Rph5 is connected to the output end of the second operational amplifier OP 2; the voltage of the second end of the photoresistor Rp is the actual photovoltage V2;
The voltage value of the voltage signal output by the output end of the second operational amplifier OP2 is equal to delta V2, and delta V2 is equal to Vf2-V2; the voltage signal is a second compensation control signal;
The resistance value of the second photo resistor Rph is equal to the resistance value of the third photo resistor Rph3, and the resistance value of the fourth photo resistor Rph4 is equal to the resistance value of the fifth photo resistor Rph.
The second compensation sub-circuit 32 is connected to the output end of the second operational amplifier OP2, and is configured to adjust a voltage value of a touch scan voltage signal transmitted to a touch electrode included in the touch electrode layer according to the second compensation control signal, so as to adjust a capacitance value of the touch electrode;
In the specific implementation, the capacitance offset DeltaF 2 of the touch electrode corresponding to different DeltaV 2 can be actually tested at the touch display panel end, and the offset DeltaF 2 is processed and stored, so that the voltage value of the touch scanning voltage signal transmitted to the touch electrode can be adjusted according to DeltaV 2, and the capacitance value of the touch electrode can be further adjusted; specifically, when the voltage value of the touch scanning voltage signal is adjusted to be high, the capacitance value of the touch electrode is increased, and when the voltage value of the touch scanning voltage signal is adjusted to be low, the capacitance value of the touch electrode is reduced.
In fig. 6, the positive power supply terminal of OP1 is connected to +15v voltage signal, and the negative power supply terminal of OP1 is connected to-15V voltage signal; the positive power end of the OP2 is connected with a +15V voltage signal, and the negative power end of the OP2 is connected with a-15V voltage signal.
The sixth embodiment of the capacitance compensation module shown in fig. 6 can compensate the capacitance value of the touch electrode in real time, so that the capacitance value of the touch electrode in the touch display panel can be kept stable under different temperature and illuminance environments.
The thermistor Rt, the first thermoelectric resistor Rth1 and the first subtractor Sub1 may be disposed on a display substrate included in the touch display panel, where the thermistor Rt is disposed corresponding to at least one touch electrode included in the touch electrode layer; or the thermistor Rt, the first thermoelectric resistor th1 and the first subtractor Sub1 may be disposed on a driving circuit board included in the touch display device, where the driving circuit board is disposed on a side of the touch display panel;
the first compensation sub-circuit 31 may be disposed on the driving circuit board;
The photo resistor Rp, the first photo resistor Rph and the second subtractor Sub2 may be disposed on a display substrate included in the touch display panel, where the photo resistor Rp is disposed corresponding to at least one touch electrode included in the touch electrode layer; or the photo resistor Rp, the first photo resistor Rph and the second subtractor Sub2 may be disposed on a driving circuit board included in the touch display device, where the driving circuit board is disposed on a side of the touch display panel;
the second compensation sub-circuit 32 may be disposed on the driving circuit board.
In actual operation, when the conversion circuit and the comparison circuit included in the capacitance compensation module are disposed on the display substrate included in the touch display panel, and when the number of conversion comparison units included in the capacitance compensation module is one, the conversion comparison unit may be disposed in the middle of the display substrate (one conversion comparison unit includes one conversion circuit and one comparison circuit); when the capacitance compensation module comprises a plurality of conversion comparison units, the conversion comparison units can be uniformly arranged on the display substrate.
The capacitance compensation method provided by the embodiment of the invention is applied to the capacitance compensation module, and comprises the following steps: performing a first compensation step; and/or performing a second compensation step;
the first compensation step includes:
The thermoelectric conversion sub-circuit is used for converting the actual ambient temperature of a touch electrode layer included in a touch display panel in the touch display device into corresponding actual thermal voltage;
the thermal voltage conversion sub-circuit compares the actual thermal voltage with a preset standard thermal voltage to generate a first compensation control signal;
the first compensation sub-circuit adjusts the voltage value of a touch scanning voltage signal transmitted to a touch electrode included in the touch electrode layer according to the first compensation control signal so as to adjust the capacitance value of the touch electrode;
The second compensation step includes:
The photoelectric conversion sub-circuit converts the actual illuminance of the light received by the touch electrode layer included in the touch display panel into corresponding actual light voltage;
The photovoltage conversion sub-circuit compares the actual photovoltage with a preset standard photovoltage to generate a second compensation control signal;
the second compensation sub-circuit adjusts the voltage value of the touch scanning voltage signal transmitted to the touch electrode included in the touch electrode layer according to the second compensation control signal so as to adjust the capacitance value of the touch electrode.
According to the capacitance compensation method disclosed by the embodiment of the invention, the actual ambient temperature of the touch electrode layer included in the touch display panel in the touch display device and/or the actual illuminance of the light received by the touch electrode layer can be converted into corresponding voltages, the voltages are compared with standard voltages, the voltage value of the touch scanning voltage signal transmitted to the touch electrode included in the touch electrode layer is regulated according to the comparison result, so that the capacitance value of the touch electrode is regulated, capacitance value compensation of the touch electrode can be realized, the influence of the temperature received by the capacitance value and the illuminance of the received light is prevented from being offset, the phenomenon of performance degradation of the touch electrode caused by the change of the capacitance value is improved, and the touch electrode works in an ideal state.
Specifically, the step of adjusting, by the first compensation sub-circuit, the voltage value of the touch scan voltage signal transmitted to the touch electrode included in the touch electrode layer according to the first compensation control signal may include:
when the first compensation control signal indicates that the actual thermal voltage is smaller than the standard thermal voltage, the first compensation sub-circuit controls to increase the voltage value of the touch scanning voltage signal;
when the first compensation control signal indicates that the actual thermal voltage is larger than the standard thermal voltage, the first compensation sub-circuit controls to reduce the voltage value of the touch scanning voltage signal;
The step of adjusting, by the second compensation sub-circuit, the voltage value of the touch scan voltage signal transmitted to the touch electrode included in the touch electrode layer according to the second compensation control signal may include:
When the second compensation control signal indicates that the actual photovoltage is smaller than the standard photovoltage, the second compensation sub-circuit controls the voltage value of the touch scanning voltage signal to be adjusted;
When the second compensation control signal indicates that the actual photovoltage is greater than the standard photovoltage, the second compensation sub-circuit controls to reduce the voltage value of the touch scanning voltage signal.
In actual operation, when the first compensation control signal indicates that the actual thermal voltage is smaller than the standard thermal voltage, the actual ambient temperature of the touch electrode is larger than the standard ambient temperature, the actual capacitance value of the touch electrode is smaller than the ideal capacitance value of the touch electrode, and the capacitance value of the touch electrode needs to be increased, at this time, the first compensation sub-circuit controls to increase the voltage value of the touch scanning voltage signal transmitted to the touch electrode so as to increase the capacitance value of the touch electrode;
When the first compensation control signal indicates that the actual thermal voltage is larger than the standard thermal voltage, the actual ambient temperature of the touch electrode is smaller than the standard ambient temperature, the actual capacitance value of the touch electrode is larger than the ideal capacitance value of the touch electrode, the capacitance value of the touch electrode needs to be regulated down, and at the moment, the first compensation sub-circuit controls the voltage value of the touch scanning voltage signal transmitted to the touch electrode to be regulated down so as to regulate down the capacitance value of the touch electrode;
when the second compensation control signal indicates that the actual photovoltage is smaller than the standard photovoltage, the actual illuminance of the light received by the touch electrode layer is marked to be larger than the standard illuminance, the actual capacitance value of the touch function electrode is smaller than the ideal touch electrode capacitance value, and the capacitance value of the touch electrode needs to be increased, at the moment, the second compensation sub-circuit controls the voltage value of the touch scanning voltage signal transmitted to the touch electrode to be increased so as to increase the capacitance value of the touch electrode;
When the second compensation control signal indicates that the actual photovoltage is greater than the standard photovoltage, the actual illuminance of the light received by the touch electrode layer is marked to be smaller than the standard illuminance, the actual capacitance value of the touch function electrode is greater than the ideal touch electrode capacitance value, and the capacitance value of the touch electrode needs to be reduced, and at the moment, the second compensation subcircuit controls the voltage value of the touch scanning voltage signal to be reduced so as to reduce the capacitance value of the touch electrode.
The touch display device comprises a touch display panel and the capacitance compensation module;
The capacitance compensation module is used for adjusting the capacitance value of the touch electrode included in the touch electrode layer according to the actual ambient temperature of the touch electrode layer included in the touch display panel and/or the actual illuminance of the light received by the touch electrode layer.
Specifically, the touch display device of the present invention further includes a driving circuit board, where the driving circuit board is disposed at a side of the touch display panel;
The capacitance compensation module comprises a thermoelectric conversion sub-circuit, wherein the thermoelectric conversion sub-circuit comprises a thermistor and a first thermoelectric resistor; the thermoelectric conversion sub-circuit includes a first subtractor; the compensation circuit in the capacitance compensation module comprises a first compensation sub-circuit arranged on the driving circuit board; the thermistor, the first thermoelectric resistor and the first subtracter are arranged on a display substrate included in the touch display panel, and the thermistor is arranged corresponding to at least one touch electrode included in the touch electrode layer; or the thermistor, the first thermoelectric resistor and the first subtracter are arranged on the driving circuit board; and/or the number of the groups of groups,
The capacitance compensation module comprises a photoelectric conversion sub-circuit, wherein the photoelectric conversion sub-circuit comprises a photoresistor and a first photoelectric resistor; the photoelectric conversion sub-circuit includes a second subtractor; the compensation circuit in the capacitance compensation module comprises a second compensation sub-circuit arranged on the driving circuit board; the photoresistor, the first photoelectric resistor and the second subtracter are arranged on a display substrate included in the touch display panel, and the photoresistor is arranged corresponding to at least one touch electrode included in the touch electrode layer; or the photoresistor, the first photoelectric resistor and the second subtracter are arranged on the driving circuit board.
In a specific implementation, the touch display panel includes a backlight source, a driving array layer and a touch electrode layer, which are disposed on the display substrate;
when the thermistor, the first thermoelectric resistor and the first subtracter are arranged on a display substrate included in the touch display panel, the thermistor, the first thermoelectric resistor and the first subtracter may be specifically arranged on the surface of the touch display panel; the thermistor, the first thermoelectric resistor and the first subtractor may be specifically disposed between the backlight source and the driving array layer; or the thermistor, the first thermoelectric resistor and the first subtracter may be specifically disposed on the surface of the touch electrode layer;
when the photoresistor, the first photoelectric resistor and the second subtracter are arranged on a display substrate included in the touch display panel, the photoresistor, the first photoelectric resistor and the second subtracter can be specifically arranged on the surface of the touch display panel; the photoresistor, the first photoresistor and the second subtracter may be specifically disposed between the backlight source and the driving array layer; or the photoresistor, the first photoelectric resistor and the second subtracter may be specifically disposed on the surface of the touch electrode layer.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.

Claims (10)

1. The capacitive compensation module is applied to a touch display device and is characterized by comprising a conversion circuit, a comparison circuit and a compensation circuit;
The conversion circuit comprises a thermoelectric conversion sub-circuit, the comparison circuit comprises a thermoelectric voltage conversion sub-circuit, and the compensation circuit comprises a first compensation sub-circuit; and/or the conversion circuit comprises a photoelectric conversion sub-circuit, the comparison circuit comprises a photoelectric conversion sub-circuit, and the compensation circuit comprises a second compensation sub-circuit;
the thermoelectric conversion sub-circuit is used for converting the actual ambient temperature of a touch electrode layer included in a touch display panel in the touch display device into corresponding actual thermal voltage;
the thermal voltage conversion sub-circuit is connected with the thermal voltage conversion sub-circuit and is used for comparing the actual thermal voltage with a preset standard thermal voltage so as to generate a first compensation control signal;
The first compensation sub-circuit is connected with the thermal voltage conversion sub-circuit and is used for adjusting the voltage value of a touch scanning voltage signal transmitted to a touch electrode included in the touch electrode layer according to the first compensation control signal so as to adjust the capacitance value of the touch electrode;
The photoelectric conversion sub-circuit is used for converting the actual illuminance of the light received by the touch electrode layer included in the touch display panel into corresponding actual photovoltage;
the photoelectric conversion sub-circuit is connected with the photoelectric conversion sub-circuit and is used for comparing the actual photoelectric voltage with a preset standard photoelectric voltage so as to generate a second compensation control signal;
The second compensation sub-circuit is connected with the photovoltage conversion sub-circuit and is used for adjusting the voltage value of a touch scanning voltage signal transmitted to the touch electrode included in the touch electrode layer according to the second compensation control signal so as to adjust the capacitance value of the touch electrode.
2. The capacitance compensation module according to claim 1, wherein the thermoelectric conversion sub-circuit comprises a thermistor and a first thermistor; the thermoelectric comparison sub-circuit comprises a first subtractor;
the first end of the thermistor is connected with the ground, and the second end of the thermistor is connected with the inverting input end of the first subtracter; the first end of the first thermoelectric resistor is connected with the second end of the thermistor, and the second end of the first thermoelectric resistor is connected with a power supply voltage;
The non-inverting input end of the first subtracter is connected with the standard thermal voltage; the output end of the first subtracter is connected with the first compensation sub-circuit; the first subtracter outputs the first compensation control signal through an output end of the first subtracter;
The thermistor, the first thermoelectric resistor and the first subtracter are arranged on a display substrate included in the touch display panel, and the thermistor is arranged corresponding to at least one touch electrode included in the touch electrode layer; or the thermistor, the first thermoelectric resistor and the first subtracter are arranged on a driving circuit board included in the touch display device, and the driving circuit board is arranged on the side edge of the touch display panel;
The first compensation sub-circuit is arranged on the driving circuit board.
3. The capacitance compensation module according to claim 2, wherein the first subtractor comprises a first operational amplifier, a second thermoelectric resistor, a third thermoelectric resistor, a fourth thermoelectric resistor, and a fifth thermoelectric resistor, wherein,
The non-inverting input end of the first operational amplifier is respectively connected with the first end of the second thermoelectric resistor and the first end of the third thermoelectric resistor; the second end of the second thermoelectric resistor is connected with the ground end, and the second end of the third thermoelectric resistor is connected with the standard thermal voltage;
the inverting input end of the first operational amplifier is respectively connected with the first end of the fourth thermoelectric resistor and the first end of the fifth thermoelectric resistor; the second end of the fourth thermoelectric resistor is connected with the second end of the thermistor, and the second end of the fifth thermoelectric resistor is connected with the output end of the first operational amplifier; the output end of the first operational amplifier is the output end of the first subtracter;
The resistance value of the second thermoelectric resistor is equal to the resistance value of the third thermoelectric resistor, and the resistance value of the fourth thermoelectric resistor is equal to the resistance value of the fifth thermoelectric resistor.
4. A capacitance compensation module according to any one of claims 1 to 3 wherein the photoelectric conversion sub-circuit comprises a photoresistor and a first photoresistor; the photoelectric comparison sub-circuit comprises a second subtracter;
The first end of the photoresistor is connected with the ground, and the second end of the photoresistor is connected with the inverting input end of the second subtracter; the first end of the first photoelectric resistor is connected with the second end of the photosensitive resistor, and the second end of the first photoelectric resistor is connected with a power supply voltage;
the non-inverting input end of the second subtracter is connected with the standard photovoltage;
the output end of the second subtracter is connected with the second compensation sub-circuit; the second subtracter outputs the second compensation control signal through an output end of the second subtracter;
the photoresistor, the first photoelectric resistor and the second subtracter are arranged on a display substrate included in the touch display panel, and the photoresistor is arranged corresponding to at least one touch electrode included in the touch electrode layer; or the photoresistor, the first photoelectric resistor and the second subtracter are arranged on a driving circuit board included in the touch display device, and the driving circuit board is arranged on the side edge of the touch display panel;
the second compensation sub-circuit is arranged on the driving circuit board.
5. The capacitance compensation module according to claim 4, wherein the second subtractor comprises a second operational amplifier, a second photo resistor, a third photo resistor, a fourth photo resistor and a fifth photo resistor, wherein,
The non-inverting input end of the second operational amplifier is respectively connected with the first end of the second photoelectric resistor and the first end of the third photoelectric resistor; the second end of the second photoelectric resistor is connected with the ground end, and the second end of the third photoelectric resistor is connected with the standard photovoltage;
The inverting input end of the second operational amplifier is respectively connected with the first end of the fourth photoelectric resistor and the first end of the fifth photoelectric resistor; the second end of the fourth photoelectric resistor is connected with the second end of the photosensitive resistor, and the second end of the fifth photoelectric resistor is connected with the output end of the second operational amplifier; the output end of the second operational amplifier is the output end of the second subtracter;
the resistance value of the second photoelectric resistor is equal to the resistance value of the third photoelectric resistor, and the resistance value of the fourth photoelectric resistor is equal to the resistance value of the fifth photoelectric resistor.
6. A capacitance compensation method applied to the capacitance compensation module according to any one of claims 1 to 5, wherein the capacitance compensation method comprises: performing a first compensation step; and/or performing a second compensation step;
the first compensation step includes:
The thermoelectric conversion sub-circuit is used for converting the actual ambient temperature of a touch electrode layer included in a touch display panel in the touch display device into corresponding actual thermal voltage;
the thermal voltage conversion sub-circuit compares the actual thermal voltage with a preset standard thermal voltage to generate a first compensation control signal;
the first compensation sub-circuit adjusts the voltage value of a touch scanning voltage signal transmitted to a touch electrode included in the touch electrode layer according to the first compensation control signal so as to adjust the capacitance value of the touch electrode;
The second compensation step includes:
The photoelectric conversion sub-circuit converts the actual illuminance of the light received by the touch electrode layer included in the touch display panel into corresponding actual light voltage;
The photovoltage conversion sub-circuit compares the actual photovoltage with a preset standard photovoltage to generate a second compensation control signal;
the second compensation sub-circuit adjusts the voltage value of the touch scanning voltage signal transmitted to the touch electrode included in the touch electrode layer according to the second compensation control signal so as to adjust the capacitance value of the touch electrode.
7. The method of claim 6, wherein the step of adjusting the voltage value of the touch scan voltage signal transmitted to the touch electrode included in the touch electrode layer by the first compensation sub-circuit according to the first compensation control signal comprises:
when the first compensation control signal indicates that the actual thermal voltage is smaller than the standard thermal voltage, the first compensation sub-circuit controls to increase the voltage value of the touch scanning voltage signal;
when the first compensation control signal indicates that the actual thermal voltage is larger than the standard thermal voltage, the first compensation sub-circuit controls to reduce the voltage value of the touch scanning voltage signal;
The step of adjusting the voltage value of the touch scanning voltage signal transmitted to the touch electrode included in the touch electrode layer by the second compensation sub-circuit according to the second compensation control signal includes:
When the second compensation control signal indicates that the actual photovoltage is smaller than the standard photovoltage, the second compensation sub-circuit controls the voltage value of the touch scanning voltage signal to be adjusted;
When the second compensation control signal indicates that the actual photovoltage is greater than the standard photovoltage, the second compensation sub-circuit controls to reduce the voltage value of the touch scanning voltage signal.
8. A touch display device, comprising a touch display panel, and further comprising the capacitance compensation module according to any one of claims 1 to 5;
The capacitance compensation module is used for adjusting the capacitance value of the touch electrode included in the touch electrode layer according to the actual ambient temperature of the touch electrode layer included in the touch display panel and/or the actual illuminance of the light received by the touch electrode layer.
9. The touch display device of claim 8, further comprising a driving circuit board disposed on a side of the touch display panel;
The capacitance compensation module comprises a thermoelectric conversion sub-circuit, wherein the thermoelectric conversion sub-circuit comprises a thermistor and a first thermoelectric resistor; the thermoelectric conversion sub-circuit includes a first subtractor; the compensation circuit in the capacitance compensation module comprises a first compensation sub-circuit arranged on the driving circuit board; the thermistor, the first thermoelectric resistor and the first subtracter are arranged on a display substrate included in the touch display panel, and the thermistor is arranged corresponding to at least one touch electrode included in the touch electrode layer; or the thermistor, the first thermoelectric resistor and the first subtracter are arranged on the driving circuit board; and/or the number of the groups of groups,
The capacitance compensation module comprises a photoelectric conversion sub-circuit, wherein the photoelectric conversion sub-circuit comprises a photoresistor and a first photoelectric resistor; the photoelectric conversion sub-circuit includes a second subtractor; the compensation circuit in the capacitance compensation module comprises a second compensation sub-circuit arranged on the driving circuit board; the photoresistor, the first photoelectric resistor and the second subtracter are arranged on a display substrate included in the touch display panel, and the photoresistor is arranged corresponding to at least one touch electrode included in the touch electrode layer; or the photoresistor, the first photoelectric resistor and the second subtracter are arranged on the driving circuit board.
10. The touch display device of claim 9, wherein the touch display panel comprises a backlight, a driving array layer, and a touch electrode layer disposed on the display substrate;
The thermistor, the first thermoelectric resistor and the first subtracter are specifically arranged on the surface of the touch display panel; the thermistor, the first thermoelectric resistor and the first subtracter are specifically arranged between the backlight source and the driving array layer; or the thermistor, the first thermoelectric resistor and the first subtracter are specifically arranged on the surface of the touch electrode layer;
The photoresistor, the first photoelectric resistor and the second subtracter are specifically arranged on the surface of the touch display panel; the photoresistor, the first photoelectric resistor and the second subtracter are specifically arranged between the backlight source and the driving array layer; or the photoresistor, the first photoelectric resistor and the second subtracter are specifically arranged on the surface of the touch electrode layer.
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US20240264699A1 (en) * 2022-06-29 2024-08-08 Chengdu Boe Optoelectronics Technology Co., Ltd. Electronic apparatus and method of detecting a gesture input on electronic apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103135864A (en) * 2011-11-28 2013-06-05 天津富纳源创科技有限公司 Capacitive touch panel and driving method for preventing current leakage thereof
CN104050926A (en) * 2014-07-07 2014-09-17 中南大学 OLED data driving circuit, active TFT OLED panel based on OLED data driving circuit and driving method of active TFT OLED panel based on OLED data driving circuit
CN104361874A (en) * 2014-11-20 2015-02-18 京东方科技集团股份有限公司 Temperature compensating circuit and method and liquid crystal display
CN107219961A (en) * 2017-07-17 2017-09-29 京东方科技集团股份有限公司 Capacitance compensation module, method, self-tolerant touch-control display panel and device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103135864A (en) * 2011-11-28 2013-06-05 天津富纳源创科技有限公司 Capacitive touch panel and driving method for preventing current leakage thereof
CN104050926A (en) * 2014-07-07 2014-09-17 中南大学 OLED data driving circuit, active TFT OLED panel based on OLED data driving circuit and driving method of active TFT OLED panel based on OLED data driving circuit
CN104361874A (en) * 2014-11-20 2015-02-18 京东方科技集团股份有限公司 Temperature compensating circuit and method and liquid crystal display
CN107219961A (en) * 2017-07-17 2017-09-29 京东方科技集团股份有限公司 Capacitance compensation module, method, self-tolerant touch-control display panel and device

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