CN107632734B - Display panel, display device and display panel control method - Google Patents
Display panel, display device and display panel control method Download PDFInfo
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- CN107632734B CN107632734B CN201710860766.0A CN201710860766A CN107632734B CN 107632734 B CN107632734 B CN 107632734B CN 201710860766 A CN201710860766 A CN 201710860766A CN 107632734 B CN107632734 B CN 107632734B
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Abstract
The embodiment of the invention provides a display panel, a display device and a display panel control method, relates to the technical field of display, and can reduce the power consumption and the generated heat of a pressure sensing unit in the display panel. In one aspect, a display panel provided in an embodiment of the present invention includes: a first power supply output terminal; a first power line connected to the first power output terminal; the first input ends of the n pressure sensing units are sequentially connected to the same first power line, and n is an integer greater than 1; in the direction far away from the first power supply output end, a first switch unit is connected in series on a first power supply line between the first input end of the ith pressure sensing unit and the first input end of the (i + 1) th pressure sensing unit; wherein i is an integer greater than or equal to 1 and less than n.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of display, in particular to a display panel, a display device and a display panel control method.
[ background of the invention ]
Along with the development of the touch display technology, the touch display technology can detect the size of pressing pressure during touch besides the touch position, and interaction between equipment and a user can be conveniently and quickly realized by detecting the size of the pressing pressure and the touch position. Wherein, the important device for realizing the human-computer interaction is a pressure sensing unit.
Usually integrated in the display panel has a plurality of forced induction units, and these forced induction units share two power cords, and at the demonstration in-process, the output of these two power cords has voltage output always, and all forced induction units are in operating condition in the display panel, and this will cause the power consumptive gauge height of display panel, and the display panel high power consumption can make display panel heat production gauge height.
[ summary of the invention ]
In view of this, embodiments of the present invention provide a display panel, a display device, and a display panel control method, which reduce power consumption and heat generated by a pressure sensing unit in the display panel.
In one aspect, an embodiment of the present invention provides a display panel, including:
a first power supply output terminal;
a first power line connected to the first power output terminal;
the first input ends of the n pressure sensing units are sequentially connected to the same first power line, and n is an integer greater than 1;
in the direction far away from the first power supply output end, a first switch unit is connected in series on a first power supply line between the first input end of the ith pressure sensing unit and the first input end of the (i + 1) th pressure sensing unit; wherein i is an integer greater than or equal to 1 and less than n.
The above-described aspects and any possible implementation further provide an implementation, further including:
the second power supply output end and the first power supply output end are positioned on the same side of the n pressure sensing units;
a second power line connected to the second power output terminal;
each pressure sensing unit further comprises a second input end, and the second input ends of the n pressure sensing units are sequentially connected to the same second power line;
and in the direction far away from the second power supply output end, a second switch unit is connected in series on a second power supply line between the second input end of the ith pressure sensing unit and the second input end of the (i + 1) th pressure sensing unit.
The above-described aspects and any possible implementation further provide an implementation, further including:
the second power supply output end and the first power supply output end are positioned on the same side of the n pressure sensing units;
a second power line connected to the second power output terminal;
each pressure sensing unit further comprises a second input end, and the second input ends of the n pressure sensing units are sequentially connected to the same second power line;
and in the direction far away from the second power output end, a third switching unit is connected in series on a second power line between the second input end of the p-th pressure sensing unit and the second input end of the p + 1-th pressure sensing unit, wherein p is an integer which is greater than or equal to 1 and less than n, and p is not equal to i.
The above-described aspects and any possible implementations further provide an implementation where i ═ 1.
The above aspects, and any possible implementations, further provide an implementation,
the pressure sensing unit is a Wheatstone bridge type pressure sensor;
the Wheatstone bridge type pressure sensor comprises a first input end, a second input end, a first output end, a second output end, a first strain pressure sensor, a second strain pressure sensor, a third strain pressure sensor and a fourth strain pressure sensor;
the first strain pressure sensor is connected in series between the first input end and the first output end, the second strain pressure sensor is connected in series between the second input end and the second output end, the third strain pressure sensor is connected in series between the second input end and the first output end, and the fourth strain pressure sensor is connected in series between the first input end and the second output end.
The above aspects, and any possible implementations, further provide an implementation,
the pressure sensing unit is a silicon piezoresistive pressure sensor.
In another aspect, an embodiment of the present invention provides a display device, which includes any one of the display panels described above.
In still another aspect, an embodiment of the present invention provides a display panel control method,
the display panel includes:
a first power supply output terminal;
a first power line connected to the first power output terminal;
the first input ends of the n pressure sensing units are sequentially connected to the same first power line, and n is an integer greater than 1;
in the direction far away from the first power supply output end, a first switch unit is connected in series on a first power supply line between the first input end of the ith pressure sensing unit and the first input end of the (i + 1) th pressure sensing unit; wherein i is an integer greater than or equal to 1 and less than n;
the method comprises the following steps:
in the initial stage of touch detection, the first switch unit is controlled to be cut off, so that the 1 st to ith pressure sensing units are started and the (i + 1) th to nth pressure sensing units are closed in the direction away from the first power output end;
a touch detection judging stage, namely judging whether the output signals of the 1 st to the ith pressure sensing units meet a first preset condition or not;
in a first touch detection working stage, when the output signals of the 1 st to ith pressure sensing units meet a first preset condition, the first switch unit is controlled to be switched on so as to start the n pressure sensing units.
The above aspects, and any possible implementations, further provide an implementation,
the display panel further includes:
the second power supply output end and the first power supply output end are positioned on the same side of the n pressure sensing units;
a second power line connected to the second power output terminal;
each pressure sensing unit further comprises a second input end, and the second input ends of the n pressure sensing units are sequentially connected to the same second power line;
in the direction far away from the second power supply output end, a second switch unit is connected in series on a second power supply line between the second input end of the ith pressure sensing unit and the second input end of the (i + 1) th pressure sensing unit;
the method specifically comprises the following steps:
at the initial stage of touch detection, the first switch unit and the second switch unit are controlled to be cut off, so that the 1 st to ith pressure sensing units are turned on and the (i + 1) th to nth pressure sensing units are turned off in the direction away from the first power output end;
in the touch detection judging stage, judging whether the output signals of the 1 st to ith pressure sensing units meet a first preset condition or not;
in the first touch detection working stage, when the output signals of the 1 st to ith pressure sensing units meet a first preset condition, the first switch unit and the second switch unit are controlled to be conducted, and the pressure detection stage is started, so that the n pressure sensing units are started.
The above aspects, and any possible implementations, further provide an implementation,
the second power supply output end and the first power supply output end are positioned on the same side of the n pressure sensing units;
a second power line connected to the second power output terminal;
each pressure sensing unit further comprises a second input end, and the second input ends of the n pressure sensing units are sequentially connected to the same second power line;
a third switching unit is connected in series on a second power line between the second input end of the p-th pressure sensing unit and the second input end of the p + 1-th pressure sensing unit in the direction far away from the second power output end, wherein p is an integer greater than or equal to 1 and less than n, and p is not equal to i
When the p is smaller than the i,
at the initial stage of touch detection, controlling the first switch unit to be turned off, so that the 1 st to ith pressure sensing units are turned on and the (i + 1) th to nth pressure sensing units are turned off in the direction away from the first power output end;
in the touch detection judging stage, judging whether the output signals of the 1 st to ith pressure sensing units meet a first preset condition or not;
in the first touch detection working stage, when the output signals of the 1 st to ith pressure sensing units meet a first preset condition, controlling the first switch unit to be switched on, controlling the second switch unit to be switched off, and entering a pressure detection stage to enable the 1 st to pth pressure sensing units to be switched on;
judging whether the output signals of the 1 st to the p-th pressure sensing units meet a second preset condition or not at the first touch detection work judgment stage;
and in a second touch detection working stage, when the output signals of the 1 st to the p-th pressure sensing units meet a second preset condition, the first switch unit and the third switch unit are controlled to be conducted, so that the n pressure sensing units are started.
The above-described aspects and any possible implementations further provide an implementation where i ═ 1.
The above aspects, and any possible implementations, further provide an implementation,
the pressure sensing unit is a Wheatstone bridge type pressure sensor;
the Wheatstone bridge type pressure sensor comprises a first input end, a second input end, a first output end, a second output end, a first strain pressure sensor, a second strain pressure sensor, a third strain pressure sensor and a fourth strain pressure sensor;
the first strain pressure sensor is connected in series between the first input end and the first output end, the second strain pressure sensor is connected in series between the second input end and the second output end, the third strain pressure sensor is connected in series between the second input end and the first output end, and the fourth strain pressure sensor is connected in series between the first input end and the second output end.
The above aspects, and any possible implementations, further provide an implementation,
the pressure sensing unit is a silicon piezoresistive pressure sensor.
According to the display panel, the display device and the display panel control method provided by the embodiment of the invention, the control switch unit is arranged between the ith pressure sensing unit and the (i + 1) th pressure sensing unit in the direction far away from the first power output end, and when a touch signal is detected, the switch unit is cut off, so that the (1) th to (i) th pressure sensing units in the direction far away from the first power output end are controlled to work, and the (i + 1) th to (n) th pressure sensing units are closed; when at least one pressure sensing unit in the 1 st to i th pressure sensing units detects a touch signal, the switch unit is closed, the n pressure sensing units are controlled to work, and the position and/or the pressure size of the pressure touch are/is determined. The quantity of the pressure sensing units working in the display panel is controlled by utilizing the on-off state of the switch units arranged between the pressure sensing units under different states. Because the pressure sensing units in the display panel have impedance, each pressure sensing unit consumes energy, and the impedance in the pressure sensing unit generates heat during operation. Therefore, compared with the prior art that all the pressure sensing units arranged in the display panel are always in the open state, the technical scheme provided by the invention saves the power consumption of the display panel and reduces the accumulation of the heat generation quantity of the display panel.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of 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 to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a display panel control method provided by the display panel shown in FIG. 1 according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of another display panel according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of another display panel according to an embodiment of the present invention;
FIG. 5 is a flowchart illustrating another display panel control method provided by the display panel shown in FIG. 4 according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of another display panel according to an embodiment of the present invention;
FIG. 7 is a flowchart illustrating another display panel control method provided in conjunction with the display panel shown in FIG. 6 according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a pressure sensing unit according to an embodiment of the present invention;
FIG. 9 is a schematic structural diagram of another pressure sensing unit according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a display device according to an embodiment of the present invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all 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.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that although the terms first, second, third, etc. may be used to describe the switching units in the embodiments of the present invention, the switching units should not be limited to these terms. These terms are only used to distinguish the switch cells from each other. For example, the first switching unit may also be referred to as the second switching unit, and similarly, the second switching unit may also be referred to as the first switching unit, without departing from the scope of embodiments of the present invention.
As shown in fig. 1, fig. 1 is a display panel provided in an embodiment of the present invention, and the display panel provided in the embodiment of the present invention includes:
a first power supply output terminal Vout 1; a first power line L1 connected to the first power output terminal Vout 1; the pressure sensing units F comprise first input ends IN1, the first input ends IN1 of the pressure sensing units F are sequentially connected to the same first power line L1, and n is an integer greater than 1; a first switching unit S is connected IN series to a first power line L1 between the first input terminal IN1 of the i-th pressure sensing unit F and the first input terminal IN1 of the i + 1-th pressure sensing unit F IN a direction away from the first power output terminal Vout 1; wherein i is an integer greater than or equal to 1 and less than n.
The first switch unit S controls the number of the operating pressure sensing units F by using the on or off state of the first switch unit S, and the process of controlling the number of the operating pressure sensing units F by the first switch unit S will be described in detail with reference to the display panel structure shown in fig. 1. When the first switch unit S is in an off state, in a direction away from the first power output terminal Vout1, the voltage output by the first power output terminal Vout1 provides operating voltages for the 1 st to i-th pressure sensing units F through the first power line L1, respectively, to detect whether there is touch on the display panel, and since the first switch unit S is off, the voltage of the first power output terminal Vout1 cannot be transmitted to the i +1 th to n-th pressure sensing units F, so that the i + 1-th to n-th pressure sensing units F do not operate; when the first switch unit S is in the on state, the voltage outputted from the first power output terminal Vout1 provides the working voltage to the 1 st to nth pressure sensing units F through the first power line L1 in the direction away from the first power output terminal Vout1, respectively, so as to accurately detect the position and/or magnitude of the touch pressure in the display panel.
Based on the structure of the display panel shown in fig. 1, an embodiment of the invention provides a display panel control method, and the flow chart of the display panel control method is shown in fig. 2. In the initial stage of touch detection, the first switch unit S in the display panel structure shown in fig. 1 is in an off state: the first touch detection working stage corresponds to the state that the first switch S in the display panel structure shown in fig. 1 is turned on; the touch detection judging stage is to trigger the first switch unit S to be switched from a cut-off state to a conducting state. Wherein, the three phases of specific operations comprise:
101. in the initial stage of touch detection, the first switch unit is controlled to be turned off, so that the 1 st to ith pressure sensing units are turned on and the (i + 1) th to nth pressure sensing units are turned off in the direction away from the first power output end.
102. And a touch detection judging stage, judging whether the output signals of the 1 st to ith pressure sensing units meet a first preset condition.
The method comprises the steps of judging whether output end signals of 1 st to ith pressure induction units meet first preset conditions or not, determining whether touch signals exist in a display panel or not, triggering a first switch to be conducted when the touch signals exist, and enabling the display panel to enter a first touch detection working stage.
103. In a first touch detection working stage, when the output signals of the 1 st to ith pressure sensing units meet a first preset condition, the first switch unit is controlled to be switched on so as to start the n pressure sensing units.
According to the display panel provided by the embodiment of the invention, the control switch unit is arranged between the ith pressure sensing unit and the (i + 1) th pressure sensing unit in the direction far away from the first power output end, and when a touch signal is detected, the switch unit is turned off, so that the (1) th to the i) th pressure sensing units in the direction far away from the first power output end are controlled to work, and the (i + 1) th to the nth pressure sensing units are turned off; when at least one pressure sensing unit in the 1 st to i th pressure sensing units detects a touch signal, the switch unit is closed, the n pressure sensing units are controlled to work, and the position and/or the pressure size of the pressure touch are/is determined. The quantity of the pressure sensing units working in the display panel is controlled by utilizing the on-off state of the switch units arranged between the pressure sensing units under different states. Because the pressure sensing units in the display panel have impedance, each pressure sensing unit consumes energy, and the impedance in the pressure sensing unit generates heat during operation. Therefore, compared with the prior art that the pressure sensing unit arranged in the display panel is always in the open state, the technical scheme provided by the invention saves the power consumption of the display panel and reduces the accumulation of the heat generated by the display panel. In addition, it should be noted that heat generated in the display panel may also affect the working performance and the service life of electronic devices in the display panel, and further cause abnormal operation of the display panel, for example, in a liquid crystal display panel, after the heat of the display panel is accumulated to a certain value, liquid crystal in the display panel is lost, so that a light source in the display panel cannot irradiate a color film substrate, and the display panel is abnormal in operation. Therefore, according to the technical scheme provided by the embodiment of the invention, the heat accumulation of the display panel is reduced to a certain extent, and the working stability and the service life of the display panel are improved to a certain extent.
Alternatively, IN conjunction with the display panel shown IN fig. 1, an embodiment of the present invention provides another display panel structure, where the structure of the display panel is as shown IN fig. 3, IN which i ═ 1, that is, the first switch unit S is connected IN series to the first power line L1 between the first input terminal IN1 of the 1 st pressure sensing unit F and the first input terminal IN1 of the 2 nd pressure sensing unit F. In the display panel, when the first switch unit S is in an off state, it can also be understood that, when the display panel is in a touch detection initial state, only the 1 st pressure sensing control unit F in the display panel is turned on to detect whether there is a touch signal in the display panel, and after it is determined that the touch signal is detected, the first switch unit S is in an on state, that is, the display panel enters a first touch detection working stage, and the pressure sensing units F in the display panel are all turned on.
It should be noted that, since the first switch unit S is connected IN series to the first power line L1 between the first input terminal IN1 of the 1 st pressure sensing unit F and the first input terminal IN1 of the 2 nd pressure sensing unit F, when the first switch unit S is turned off, only one pressure sensing unit F is operated, and compared to the case where the first switch unit S is disposed at another position on the first power line L1, the arrangement is more power-saving and reduces heat generation.
As shown in fig. 4, fig. 4 is another display panel provided in an embodiment of the present invention, and in combination with the structure of the display panel in fig. 1, the display panel further includes: a second power output terminal Vout2, wherein the second power output terminal Vout2 and the first power output terminal Vout1 are located on the same side of the n pressure sensing units F; a second power line L2 connected to the second power output terminal Vout 2; each pressure sensing unit F further includes a second input terminal IN2, and the second input terminals IN2 of the n pressure sensing units F are sequentially connected to the same second power line L2; IN a direction away from the second power output terminal Vout2, a second switching unit T is connected IN series to a second power line L2 between the second input terminal IN2 of the i-th pressure-sensing unit F and the second input terminal IN2 of the i + 1-th pressure-sensing unit F.
Among them, the switching units (e.g., the first switching unit S, the second switching unit T, etc.) involved in the display panel may be thin film transistors.
The display panel and the display panel shown in fig. 1 both use the on-off state of the switch unit to control the number of the pressure sensing units F, and the difference is that the display panel shown in fig. 4 needs to turn on the n pressure sensing units F in the display panel only when the first switch unit S and the second switch unit T are in the on-state at the same time. Therefore, based on the display panel shown in fig. 4, an embodiment of the present invention provides another display panel control method, a flowchart of which is shown in fig. 5, the method also includes three stages, namely, a touch detection initial stage, a touch detection judgment stage and a first touch detection working stage, and the process of executing the method includes:
201. and in the initial stage of touch detection, the first switch unit and the second switch unit are controlled to be cut off, so that the 1 st to ith pressure sensing units are started and the (i + 1) th to nth pressure sensing units are closed in the direction away from the first power output end.
202. And in the touch detection and judgment stage, judging whether the output signals of the 1 st to ith pressure sensing units meet a first preset condition.
203. In a first touch detection working stage, when the output signals of the 1 st to ith pressure sensing units meet a first preset condition, the first switch unit and the second switch unit are controlled to be conducted, and a pressure detection stage is started, so that the n pressure sensing units are started.
It should be noted that, in addition to the technical effects of the display panel shown in fig. 1, the display panel shown in fig. 4 also has the function of preventing static electricity from flowing into the closed pressure sensing unit F through the second power line L2, so as to suppress the damage of the static electricity to the pressure sensing unit F in the display panel to some extent.
As shown in fig. 6, fig. 6 is another display panel provided in an embodiment of the present invention, and in combination with the structure of the display panel in fig. 1, the display panel further includes: a second power output terminal Vout2, the second power output terminal Vout2 and the first power output terminal Vout1 being located on the same side of the n pressure sensing cells F; a second power line L2 connected to the second power output terminal Vout 2; each pressure sensing unit F further includes a second input terminal IN2, and the second input terminals IN2 of the n pressure sensing units F are sequentially connected to the same second power line L2; IN the direction away from the second power output terminal Vout2, a third switching unit K is connected IN series to the second power line L2 between the second input terminal IN2 of the p-th pressure-sensing unit F and the second input terminal IN2 of the p + 1-th pressure-sensing unit F, where p is an integer greater than or equal to 1 and less than n, and p is not equal to i.
In the display panel illustrated in fig. 6, when p is greater than i, the number of the pressure sensing units F operating in the display panel can be divided into three cases; firstly, when the first switch unit S is in an off state, only the 1 st to ith pressure sensing units F are turned on in the display panel; secondly, when the first switch unit S is in a conducting state and the third switch unit K is in a stopping state, the 1 st to the p-th pressure sensing units F are turned on in the display panel; thirdly, when the first switch unit S is in a conducting state and the third switch unit K is in a conducting state, the 1 st to nth pressure sensing units F are turned on in the display panel.
Based on the structure of the display panel shown in fig. 6, an embodiment of the invention provides another display panel control method, a flowchart of which is shown in fig. 7, and the method may include five stages, i.e., an initial touch detection stage, a touch detection judgment stage, a first touch detection working judgment stage, and a second touch detection working stage. In the initial stage of touch detection, the first switch unit S and the third switch unit K in the display panel structure shown in fig. 6 are both in the off state: the first touch detection working stage corresponds to the display panel structure shown in fig. 6 where the first switch S is in a conducting state and the third switch unit K is in a blocking state; the second touch detection working stage corresponds to the first switch unit S and the third switch unit in the display panel being in the cut-off state, and the touch detection judging stage is to trigger only the first switch unit S to be switched from the cut-off state to the conducting state; the first touch detection work judging stage is a stage of switching the third switch unit K from an off state to an on state under the condition that the first switch unit S is turned on. The five stages of specific operations comprise:
301. in the initial stage of touch detection, the first switch unit is controlled to be turned off, so that the 1 st to ith pressure sensing units are turned on and the (i + 1) th to nth pressure sensing units are turned off in the direction away from the first power output end.
302. And in the touch detection and judgment stage, judging whether the output signals of the 1 st to ith pressure sensing units meet a first preset condition.
303. And in the first touch detection working stage, when the output signals of the 1 st to ith pressure sensing units meet a first preset condition, the first switch unit is controlled to be switched on, the second switch unit is controlled to be switched off, and the pressure detection stage is started, so that the 1 st to the pth pressure sensing units are started.
304. And a first touch detection work judgment stage for judging whether the output signals of the 1 st to the p-th pressure sensing units meet a second preset condition.
305. And in a second touch detection working stage, when the output signals of the 1 st to the p-th pressure sensing units meet a second preset condition, the first switch unit and the third switch unit are controlled to be conducted so as to start the n pressure sensing units.
It should be noted that, the display panel is provided with the third switch unit K on the second power line, and in the process that the display panel detects the touch pressure in the display panel, the display panel is further controlled to operate by controlling the on/off state of the third switch unit K in the process of detecting the touch pressure, and compared with a display panel in which all the pressure sensing units in the display panel are directly controlled to be on when the touch pressure is detected, the display panel provided in fig. 6 further saves power consumption and reduces heat generation.
Alternatively, as shown in fig. 8, fig. 8 is a schematic structural diagram of a pressure sensing unit according to an embodiment of the present invention, where the pressure sensing unit F is a wheatstone bridge type pressure sensor; the wheatstone bridge type pressure sensor comprises a first input terminal IN1, a second input terminal IN2, a first output terminal OUT1, a second output terminal OUT2, a first strain pressure sensor Y1, a second strain pressure sensor Y2, a third strain pressure sensor Y3 and a fourth strain pressure sensor Y4; IN each pressure sensing unit F, a first strain pressure sensor M1 is connected IN series between the first input terminal IN1 and the first output terminal OUT1, the second strain pressure sensor Y2 is connected IN series between the second input terminal IN2 and the second output terminal OUT2, the third strain pressure sensor Y3 is connected IN series between the second input terminal IN2 and the first output terminal OUT1, and the fourth strain pressure sensor Y4 is connected IN series between the first input terminal IN1 and the second output terminal OUT 2.
Alternatively, as shown in fig. 9, fig. 9 is a schematic structural diagram of another pressure sensing unit according to an embodiment of the present invention, where the pressure sensing unit F is a silicon piezoresistive pressure sensor. The silicon piezoresistive pressure sensor may have a quadrilateral structure, four sides of the silicon piezoresistive pressure sensor are respectively connected with the first input end IN1, the second input end IN2, the first output end OUT1 and the second output end OUT2, the first input end IN1 and the second input end IN2 are respectively connected to two opposite sides, and the first output end OUT1 and the second output end OUT2 are respectively connected to the other two opposite sides.
It should be noted that, regardless of the pressure sensing unit structure of the wheatstone bridge type pressure sensor IN fig. 8 or the pressure sensing unit structure of the silicon piezoresistive pressure sensor IN fig. 9, the pressure sensing unit structure can be equivalent to a bridge including a first bridge arm, a second bridge arm, a third bridge arm and a fourth bridge arm which are sequentially connected end to end, a connection point of the first bridge arm and the fourth bridge arm is a first input end IN1, a connection point of the second bridge arm and the third bridge arm is a second input end IN2, a connection point of the first bridge arm and the second bridge arm is a first output end OUT1, and a connection point of the third bridge arm and the fourth bridge arm is a second output end OUT 2. When the display panel is not deformed, and the resistance ratio of the first bridge arm to the second bridge arm is equal to the resistance ratio of the fourth bridge arm to the third bridge arm, the bridge reaches a balanced state, and the voltage value at the first output end OUT1 is equal to the voltage value at the second output end OUT 2; when the display panel deforms, the four bridge arms deform, so that the resistance values of the bridge arms change, the bridge breaks a balance state, namely the ratio of the resistance values of the first bridge arm to the second bridge arm is not equal to the ratio of the resistance values of the fourth bridge arm to the third bridge arm, the voltage value at the first output end OUT1 is not equal to the voltage value at the second output end OUT2, the difference between the voltage value at the first output end OUT1 and the voltage value at the second output end OUT2 corresponds to the pressure value applied to the display panel, and in the pressure detection process, the corresponding pressure value can be obtained by obtaining the voltage value at the first output end OUT1 and the voltage value at the second output end OUT 2.
It should be noted that, since the material of the silicon piezoresistive sensor is mainly monocrystalline silicon, compared with other metal type pressure sensors, the silicon piezoresistive sensor has higher sensitivity and can detect even a smaller touch pressure, and therefore, even if only the 1 st to i th pressure sensing units work, the silicon piezoresistive sensor can detect a touch action far away from the output end of the power line, so as to trigger the start of more pressure sensing units, and further accurately detect the position and/or the magnitude of the pressure.
As shown in fig. 10, fig. 10 is a schematic structural diagram of a display device according to an embodiment of the present invention, where the display device includes the display panel 100.
The display device can be any electronic equipment with a display touch function, such as a mobile phone, a tablet computer, a notebook computer or a television.
According to the display device provided by the embodiment of the invention, the control switch unit is arranged between the ith pressure sensing unit and the (i + 1) th pressure sensing unit in the direction far away from the first power output end, and when a touch signal is detected, the switch unit is turned off, so that the (1) th to the i) th pressure sensing units in the direction far away from the first power output end are controlled to work, and the (i + 1) th to the nth pressure sensing units are turned off; when at least one of the 1 st to ith pressure sensing units detects a touch signal, the switch unit is closed, the n pressure sensing units are controlled to work, and the position and/or the pressure size of the pressure touch are/is determined. The quantity of the pressure sensing units working in the display panel is controlled by utilizing the on-off state of the switch units arranged between the pressure sensing units under different states. Because the pressure sensing units in the display panel have impedance, each pressure sensing unit consumes energy, and the impedance in the pressure sensing unit generates heat during operation. Therefore, compared with the prior art that the pressure sensing unit arranged in the display panel is always in the open state, the technical scheme provided by the invention saves the power consumption of the display panel and reduces the accumulation of the heat generated by the display panel. In addition, it should be noted that heat generated in the display panel may also affect the working performance and the service life of electronic devices in the display panel, and further cause abnormal operation of the display panel, for example, in a liquid crystal display panel, after the heat of the display panel is accumulated to a certain value, liquid crystal in the display panel is lost, so that a light source in the display panel cannot irradiate a color film substrate, and the display panel is abnormal in operation. Therefore, according to the technical scheme provided by the embodiment of the invention, the heat accumulation of the display panel is reduced, and the working stability and the service life of the display panel are improved to a certain extent.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (13)
1. A display panel, comprising:
a first power supply output terminal;
a first power line connected to the first power output terminal;
the first input ends of the n pressure sensing units are sequentially connected to the same first power line, and n is an integer greater than 1;
in the direction far away from the first power supply output end, a first switch unit is connected in series on a first power supply line between the first input end of the ith pressure sensing unit and the first input end of the (i + 1) th pressure sensing unit; wherein i is an integer greater than or equal to 1 and less than n;
the first switch unit is used for controlling the number of the pressure sensing units which operate by utilizing the on state or the off state of the first switch unit: when the first switch unit is in a cut-off state, in a direction away from the first power output end, the voltage output by the first power output end provides working voltage for the 1 st to the ith pressure sensing units through the first power line, so that the 1 st to the ith pressure sensing units are used for detecting whether touch is on the display panel, and the (i + 1) th to the nth pressure sensing units do not work; when the first switch unit is in a conducting state, in a direction far away from the first power output end, the voltage output by the first power output end provides working voltage for the 1 st to nth pressure sensing units through the first power line, so that the 1 st to nth pressure sensing units are used for accurately detecting the position and/or size of touch pressure in the display panel; when the output signals of the 1 st to ith pressure sensing units meet a first preset condition, the first switch unit is changed from an off state to an on state.
2. The display panel according to claim 1, further comprising:
the second power supply output end and the first power supply output end are positioned on the same side of the n pressure sensing units;
a second power line connected to the second power output terminal;
each pressure sensing unit further comprises a second input end, and the second input ends of the n pressure sensing units are sequentially connected to the same second power line;
and in the direction far away from the second power supply output end, a second switch unit is connected in series on a second power supply line between the second input end of the ith pressure sensing unit and the second input end of the (i + 1) th pressure sensing unit.
3. The display panel according to claim 1, further comprising:
the second power supply output end and the first power supply output end are positioned on the same side of the n pressure sensing units;
a second power line connected to the second power output terminal;
each pressure sensing unit further comprises a second input end, and the second input ends of the n pressure sensing units are sequentially connected to the same second power line;
and in the direction far away from the second power output end, a third switching unit is connected in series on a second power line between the second input end of the p-th pressure sensing unit and the second input end of the p + 1-th pressure sensing unit, wherein p is an integer which is greater than or equal to 1 and less than n, and p is not equal to i.
4. The display panel according to claim 1, wherein i is 1.
5. The display panel according to any one of claims 1 to 3,
the pressure sensing unit is a Wheatstone bridge type pressure sensor;
the Wheatstone bridge type pressure sensor comprises a first input end, a second input end, a first output end, a second output end, a first strain pressure sensor, a second strain pressure sensor, a third strain pressure sensor and a fourth strain pressure sensor;
the first strain pressure sensor is connected in series between the first input end and the first output end, the second strain pressure sensor is connected in series between the second input end and the second output end, the third strain pressure sensor is connected in series between the second input end and the first output end, and the fourth strain pressure sensor is connected in series between the first input end and the second output end.
6. The display panel according to any one of claims 1 to 3,
the pressure sensing unit is a silicon piezoresistive pressure sensor.
7. A display device, characterized in that it comprises a display panel according to any one of the preceding claims 1 to 6.
8. A control method of a display panel is characterized in that,
the display panel includes:
a first power supply output terminal;
a first power line connected to the first power output terminal;
the first input ends of the n pressure sensing units are sequentially connected to the same first power line, and n is an integer greater than 1;
in the direction far away from the first power supply output end, a first switch unit is connected in series on a first power supply line between the first input end of the ith pressure sensing unit and the first input end of the (i + 1) th pressure sensing unit; wherein i is an integer greater than or equal to 1 and less than n;
the method comprises the following steps:
in the initial stage of touch detection, the first switch unit is controlled to be cut off, so that the 1 st to ith pressure sensing units are started and the (i + 1) th to nth pressure sensing units are closed in the direction away from the first power output end;
a touch detection judging stage, namely judging whether the output signals of the 1 st to the ith pressure sensing units meet a first preset condition or not;
in a first touch detection working stage, when the output signals of the 1 st to ith pressure sensing units meet a first preset condition, the first switch unit is controlled to be switched on so as to start the n pressure sensing units.
9. The method of claim 8,
the display panel further includes:
the second power supply output end and the first power supply output end are positioned on the same side of the n pressure sensing units;
a second power line connected to the second power output terminal;
each pressure sensing unit further comprises a second input end, and the second input ends of the n pressure sensing units are sequentially connected to the same second power line;
in the direction far away from the second power supply output end, a second switch unit is connected in series on a second power supply line between the second input end of the ith pressure sensing unit and the second input end of the (i + 1) th pressure sensing unit;
the method specifically comprises the following steps:
at the initial stage of touch detection, the first switch unit and the second switch unit are controlled to be cut off, so that the 1 st to ith pressure sensing units are turned on and the (i + 1) th to nth pressure sensing units are turned off in the direction away from the first power output end;
in the touch detection judging stage, judging whether the output signals of the 1 st to ith pressure sensing units meet a first preset condition or not;
in the first touch detection working stage, when the output signals of the 1 st to ith pressure sensing units meet a first preset condition, the first switch unit and the second switch unit are controlled to be conducted, and the pressure detection stage is started, so that the n pressure sensing units are started.
10. The method of claim 8,
the second power supply output end and the first power supply output end are positioned on the same side of the n pressure sensing units;
a second power line connected to the second power output terminal;
each pressure sensing unit further comprises a second input end, and the second input ends of the n pressure sensing units are sequentially connected to the same second power line;
a third switching unit is connected in series on a second power line between the second input end of the p-th pressure sensing unit and the second input end of the p + 1-th pressure sensing unit in the direction far away from the second power output end, wherein p is an integer greater than or equal to 1 and less than n, and p is not equal to i
When the p is smaller than the i,
at the initial stage of touch detection, controlling the first switch unit to be turned off, so that the 1 st to ith pressure sensing units are turned on and the (i + 1) th to nth pressure sensing units are turned off in the direction away from the first power output end;
in the touch detection judging stage, judging whether the output signals of the 1 st to ith pressure sensing units meet a first preset condition or not;
in the first touch detection working stage, when the output signals of the 1 st to ith pressure sensing units meet a first preset condition, controlling the first switch unit to be switched on, controlling the second switch unit to be switched off, and entering a pressure detection stage to enable the 1 st to pth pressure sensing units to be switched on;
judging whether the output signals of the 1 st to the p-th pressure sensing units meet a second preset condition or not at the first touch detection work judgment stage;
and in a second touch detection working stage, when the output signals of the 1 st to the p-th pressure sensing units meet a second preset condition, the first switch unit and the third switch unit are controlled to be conducted, so that the n pressure sensing units are started.
11. The method of claim 8, wherein i-1.
12. The method according to any one of claims 8 to 10,
the pressure sensing unit is a Wheatstone bridge type pressure sensor;
the Wheatstone bridge type pressure sensor comprises a first input end, a second input end, a first output end, a second output end, a first strain pressure sensor, a second strain pressure sensor, a third strain pressure sensor and a fourth strain pressure sensor;
the first strain pressure sensor is connected in series between the first input end and the first output end, the second strain pressure sensor is connected in series between the second input end and the second output end, the third strain pressure sensor is connected in series between the second input end and the first output end, and the fourth strain pressure sensor is connected in series between the first input end and the second output end.
13. The method according to any one of claims 8 to 10,
the pressure sensing unit is a silicon piezoresistive pressure sensor.
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| US20170068374A1 (en) * | 2015-09-09 | 2017-03-09 | Microsoft Technology Licensing, Llc | Changing an interaction layer on a graphical user interface |
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| CN104793829A (en) * | 2015-05-08 | 2015-07-22 | 厦门天马微电子有限公司 | Touch control device, driving method, array substrate and liquid crystal display panel |
| CN105301822A (en) * | 2015-12-11 | 2016-02-03 | 上海中航光电子有限公司 | Array substrate, display panel and display device |
| CN107092119A (en) * | 2017-06-30 | 2017-08-25 | 上海天马微电子有限公司 | Display base plate and display panel |
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