CN108597424B - Display panel, display device and detection method - Google Patents
Display panel, display device and detection method Download PDFInfo
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- CN108597424B CN108597424B CN201810016374.0A CN201810016374A CN108597424B CN 108597424 B CN108597424 B CN 108597424B CN 201810016374 A CN201810016374 A CN 201810016374A CN 108597424 B CN108597424 B CN 108597424B
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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Abstract
The embodiment of the invention provides a display panel, a display device and a detection method. In the display panel, control terminals of first switches and second switches are coupled with signal terminals, a first terminal of each first switch is coupled with a first output terminal of a corresponding pressure detection sensor, a first terminal of each second switch is coupled with a second output terminal of a corresponding pressure detection sensor, a first sub-gate driving unit is coupled with a first terminal of a corresponding first switch, and a second terminal of each first switch is coupled with a gate on a row corresponding to the first sub-gate driving unit; the second sub-gate driving unit is coupled with the first end of the corresponding second switch, the second end of the second switch is coupled with the grid electrode on the corresponding row of the second sub-gate driving unit, and whether the pressure detection sensor which is broken is arranged in the display panel or not can be determined according to the condition of a dark line through one-time detection after the design is adopted, so that the detection efficiency of the display panel is improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel, a display device and a detection method.
Background
Before the display panel is manufactured, it is necessary to detect a circuit in the display panel, for example, to detect a pressure detection sensor, and when detecting the pressure detection sensor, it is necessary to input a voltage at a detection point, and then measure the output ends of the pressure detection sensors one by using a multimeter or an oscilloscope, so as to determine which pressure detection sensor has an open circuit, but the detection efficiency of the detection method is low.
Disclosure of Invention
The embodiment of the invention provides a display panel, a display device and a detection method, which are used for solving the problem of low detection efficiency of the detection method in the prior art.
In a first aspect, an embodiment of the present invention provides a display panel, where the display panel includes a display area and a non-display area, and the display panel further includes:
a plurality of pressure detection sensors, each of which includes a first input terminal, a second input terminal, a first output terminal, and a second output terminal, the first input terminal being electrically connected to the first detection terminal, the second input terminal being electrically connected to the second detection terminal;
the plurality of pressure detection sensors are positioned in the non-display area, the plurality of pressure detection sensors include a plurality of first pressure detection sensors and a plurality of second pressure detection sensors, and the plurality of first pressure detection sensors and the plurality of second pressure detection sensors are positioned on two opposite sides of the non-display area;
a plurality of first switches and a plurality of second switches, control terminals of the first switches and the second switches being coupled to a signal terminal, a first terminal of each first switch being coupled to a first output terminal of the corresponding pressure detection sensor, a first terminal of each second switch being coupled to a second output terminal of the corresponding pressure detection sensor, the plurality of first switches and the plurality of second switches being located in the non-display area, a control terminal of the first switch being turned on when a voltage of the control terminal of the first switch is higher than a voltage of the first terminal of the first switch, and a control terminal of the second switch being turned on when a voltage of the control terminal of the second switch is higher than a voltage of the first terminal of the second switch;
the plurality of gate driving units are positioned in the non-display area and comprise a first gate driving unit and a second gate driving unit, the first gate driving unit and the first pressure detection sensor are positioned at the same side, the second gate driving unit and the second pressure detection sensor are positioned at the same side, the plurality of first gate driving units are arranged along the column direction, the plurality of first gate driving units are electrically connected in a cascade manner, the plurality of second gate driving units are arranged along the column direction, the plurality of second gate driving units are electrically connected in a cascade manner, and the plurality of first gate driving units and the plurality of second gate driving units are alternately arranged along the column direction;
the plurality of first gate driving units comprise first sub-gate driving units and second sub-gate driving units, the first sub-gate driving units are coupled with the first ends of the corresponding first switches, and the second ends of the first switches are coupled with the gates on the corresponding rows of the first sub-gate driving units; the second sub-gate driving unit is coupled with a first end of the corresponding second switch, and a second end of the second switch is coupled with the gate on the row corresponding to the second sub-gate driving unit;
and each data line is coupled with one end of the source drain metal layer on the corresponding column.
In a second aspect, an embodiment of the present invention provides a display device, including the display panel described above.
In a third aspect, an embodiment of the present invention provides a detection method, applied to the display panel according to any one of claims 1 to 7, in a detection phase, where the first detection terminal inputs a first electrical signal, the second detection terminal inputs a ground signal, the signal terminal is used for providing a second electrical signal for turning on the first switch and the second switch, the first electrical signal corresponds to a voltage U1, the second electrical signal corresponds to a voltage U2, U1/2 < U2 < U1, and the method includes:
in the detection stage, the signal end outputs the second electrical signal, the first detection terminal outputs the first electrical signal, the plurality of gate driving units output scanning signals, and the plurality of data lines output data signals to one end of the source/drain metal layer on the corresponding row.
Any one of the above technical solutions has the following beneficial effects:
in the embodiment of the present invention, after the design according to the first aspect is adopted, when performing detection, the signal end outputs a second electrical signal, the first switch and the second switch are turned on, and after the first detection terminal outputs the first electrical signal, if the pressure detection sensor is turned off, the first output end is grounded, so as to pull down the voltage of the scanning signal output by the corresponding gate driving unit, and further, pixels on the corresponding row cannot emit light; or the voltage output by the first output end is higher than the voltage of the control end of the first switch, so that the first switch is turned off, the scanning signal output by the corresponding gate driving unit cannot be transmitted to the gate on the corresponding row, and the pixels on the corresponding row cannot emit light; or the second output end is grounded, so that the voltage of the scanning signal output by the corresponding gate drive unit is pulled down, and the pixels on the corresponding row cannot emit light; or the voltage output by the second output end is higher than the voltage of the control end of the second switch, so that the second switch is cut off, so that the scanning signal outputted by the corresponding gate driving unit cannot be transmitted to the gate on the corresponding row, and further the pixels on the corresponding row cannot emit light, when the pressure detection sensor is disconnected and the detection is carried out, the pixels on the corresponding row can not emit light, thereby causing the display panel to have a dark line, judging whether the pressure detection sensor is broken according to whether the display panel has the dark line, and can also judge which pressure detection sensor has broken circuit according to the position of the dark line, therefore after adopting the design, whether a pressure detection sensor which is broken or not exists in the display panel can be determined through one-time detection, so that the detection efficiency of the display panel is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic top view of a display panel according to an embodiment of the present invention;
FIG. 2 is an enlarged schematic view within the dashed box 8 of FIG. 1;
fig. 3 is a schematic cross-sectional view of a display panel according to an embodiment of the invention;
fig. 4 is a schematic structural diagram of a pressure sensor according to an embodiment of the present invention;
fig. 5 is a schematic display diagram of a display panel according to an embodiment of the present invention;
FIG. 6 is another enlarged schematic view within dashed box 8 of FIG. 1;
FIG. 7 is a schematic top view of another display panel according to an embodiment of the present invention;
fig. 8 is a schematic top view of a portion of a display panel according to an embodiment of the invention;
fig. 9 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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 the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be noted that the terms "upper", "lower", "left", "right", and the like used in the description of the embodiments of the present invention are used in the angle shown in the drawings, and should not be construed as limiting the embodiments of the present invention. In addition, in this context, it is also to be understood that when an element is referred to as being "on" or "under" another element, it can be directly formed on "or" under "the other element or be indirectly formed on" or "under" the other element through an intermediate element.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Fig. 1 is a schematic top view of a display panel according to an embodiment of the present invention, and fig. 2 is an enlarged schematic view of a dotted frame 8 in fig. 1, as shown in fig. 1 and fig. 2, the display panel includes a display area 1 and a non-display area 2, and the display panel further includes: a plurality of pressure detection sensors 3, each of the pressure detection sensors 3 including a first input terminal 31, a second input terminal 32, a first output terminal 33, and a second output terminal 34, the first input terminal 31 being electrically connected to the first detection terminal 41, the second input terminal 32 being electrically connected to the second detection terminal 42; the plurality of pressure detection sensors 3 are located in the non-display area 2, the plurality of pressure detection sensors 3 include a plurality of first pressure detection sensors 301 and a plurality of second pressure detection sensors 302, and the plurality of first pressure detection sensors 301 and the plurality of second pressure detection sensors 302 are located on opposite sides of the non-display area 2; a plurality of first switches 51 and a plurality of second switches 52, control terminals of the first switches 51 and the second switches 52 being coupled to the signal terminal 6, a first terminal of each first switch 51 being coupled to the first output terminal 33 of the corresponding pressure detection sensor 3, a first terminal of each second switch 52 being coupled to the second output terminal 34 of the corresponding pressure detection sensor 3, the plurality of first switches 51 and the plurality of second switches 52 being located in the non-display area 2.
Specifically, when the voltage of the control terminal of the first switch 51 is higher than the voltage of the first terminal of the first switch 51, the first switch 51 is turned on; when the voltage of the control terminal of the second switch 52 is higher than the voltage of the first terminal of the second switch 52, the second switch 52 is turned on; the plurality of gate driving units 7 are located in the non-display region 2, the plurality of gate driving units 7 include a first gate driving unit 71 and a second gate driving unit 72, the first gate driving unit 71 and the first pressure detection sensor 301 are located on the same side, the second gate driving unit 72 and the second pressure detection sensor 302 are located on the same side, the plurality of first gate driving units 71 are arranged in the column direction, the plurality of first gate driving units 71 are electrically connected in a cascade manner, the plurality of second gate driving units 72 are arranged in the column direction, the plurality of second gate driving units 72 are electrically connected in a cascade manner, and the plurality of first gate driving units 71 and the plurality of second gate driving units 72 are alternately arranged in the column direction; the first gate driving unit 71 and the second gate driving unit 72 each include a first sub-gate driving unit 711 and a second sub-gate driving unit 712, respectively, each gate driving unit 7 corresponds to a gate on a row of sub-pixel units, the first sub-gate driving unit 711 is coupled to a first end of the corresponding first switch 51, and a second end of the first switch 51 is coupled to a gate on a row of the first sub-gate driving unit 711; the second sub-gate driving unit 712 is coupled to a first end of the corresponding second switch 52, and a second end of the second switch 52 is coupled to the gate of the corresponding row of the second sub-gate driving unit 712; and a plurality of data lines 9, wherein each data line 9 is coupled with one end of the source drain metal layer on the corresponding column.
Specifically, as shown in fig. 1 and fig. 2, since the plurality of pressure detection sensors 3, the plurality of first switches 51, the plurality of second switches 52, and the plurality of gate driving units 7 are all located in the non-display region 2, the influence on the light transmittance of the display panel can be reduced, which is beneficial to improving the display effect of the display panel.
Fig. 3 is a schematic cross-sectional view of a display panel according to an embodiment of the present invention, as shown in fig. 3, the display panel includes a substrate 11, a semiconductor layer 12 located on the substrate 11, a gate insulating layer 13 located on a side of the semiconductor layer 12 away from the substrate, a gate 14 located on a side of the gate insulating layer 13 away from the substrate 11, an interlayer insulating layer 15 located on a side of the gate 14 away from the substrate 11, and a source-drain metal layer 16 located on a side of the interlayer insulating layer 15 away from the substrate 11, where the source-drain metal layer 16 is electrically connected to the semiconductor layer 12 through two via holes penetrating through the gate insulating layer 13 and the interlayer insulating layer 15, and as shown in fig. 2, a second end of the first switch 51 is coupled to the gate 14 on a row corresponding to the first sub-gate driving unit; a second terminal of the second switch 52 is coupled to the gate of the corresponding row of the second sub-gate driving unit 712; as shown in fig. 1, each data line 9 is coupled to one end of the source/drain metal layer 16 on the corresponding column. As shown in fig. 3, the gate electrode 14 makes the source-drain metal layer conductive by the scanning signal provided by the gate driving unit 7, and then the data signal provided by the data line 9 is conducted from one end of the source-drain metal layer 16 to the other end, so that the display panel displays an image.
As shown in fig. 1, a plurality of pressure detecting sensors 3 are uniformly distributed on opposite sides of the non-display area 2, that is, the first pressure detecting sensor 301 is disposed at one side of the non-display area 2, and the second pressure detecting sensor 302 is disposed at the opposite side thereof, since one pressure detecting sensor 3 has a certain detection range, the detection accuracy of the pressure detection sensor 3 in this detection range is relatively high, and after adopting the above-described design, it is possible to make the plurality of pressure detecting sensors 3 uniformly distributed around the display panel, and each pressure detecting sensor 3 is responsible for one detection range, and then can make the detection accuracy on each position on the display panel relatively accurate to can the detection range of a plurality of pressure detection sensors 3 can be as much as possible cover the display panel, be favorable to reducing the scope of the detection blind spot region of display panel.
As shown in fig. 1, the plurality of gate driving units 7 include a first gate driving unit 71 and a second gate driving unit 72, the first gate driving unit 71 is disposed on the same side as the first pressure detection sensor 301, the second gate driving unit 72 is disposed on the same side as the second pressure detection sensor 302, the first gate driving unit 71 forms a first gate driving circuit 701 in a cascade manner, the second gate driving unit 72 forms a second gate driving circuit 702 in a cascade manner, and when a display panel displays, the first gate driving circuit 701 and the second gate driving circuit 702 can provide scanning signals for the display panel to display. Each gate driving unit 7 at least corresponds to one row of sub-pixel units (not shown), when the plurality of first gate driving units 71 and the plurality of second gate driving units 72 are alternately arranged, the arrangement manner of the first gate driving units 71 and the second gate driving units 72 can be the same as that of the sub-pixel unit rows, and further the first gate driving units 71 and the second gate driving units 72 can be arranged corresponding to the corresponding sub-pixel unit rows, so that when the gate driving units 7 are connected with the corresponding sub-pixel unit rows, only cross-line connection needs to be performed, and designs such as wire winding are not needed, and further, the connection manner of the gate driving units 7 and the corresponding sub-pixel unit rows is relatively simple, and the difficulty in wiring is reduced.
As shown by the dotted line frame 8 in fig. 1 and fig. 2, in the detection, since the control terminal of the first switch 51 is turned on when the voltage is higher than the voltage of the first terminal of the first switch 51 (the voltage of the first output terminal 33), and the control terminal of the second switch 52 is turned on when the voltage is higher than the voltage of the first terminal of the second switch 52 (the voltage of the second output terminal 34), the first sub-gate driving unit 711 needs to turn on the first switch 51 when transmitting a signal to the corresponding sub-pixel cell row through the first switch 51, and the second sub-gate driving unit 712 needs to turn on the second switch 52 when transmitting a signal to the corresponding sub-pixel cell row through the second switch 52.
With respect to the detection circuit shown in fig. 2, an embodiment of the present invention provides a detection method, and the structure of the pressure detection sensor 3 in fig. 2 is shown in fig. 4, in which the resistances of the first resistor R1, the second resistor R2, the third resistor R3 and the fourth resistor R4 are all equal, as shown in fig. 2, the first detection terminal 41 inputs the first electrical signal, the second detection terminal 42 inputs the ground signal, the signal terminal 6 is used for providing the second electrical signal for turning on the first switch 51 and the second switch 52, the voltage corresponding to the first electrical signal is U1, the voltage corresponding to the second electrical signal is U2, since the voltage of the control terminal of the first switch 51 is higher than the voltage of the first terminal of the first switch 51, the voltage of the control terminal of the second switch 52 is higher than the voltage of the first terminal of the second switch 52, and therefore, in order to make the pressure detection sensor 3 not emit light after the circuit is broken, when the first switch 51 and/or the second switch 52 need to be turned off, the voltage at the first end of the first switch 51 needs to be higher than the voltage at the control end of the first switch 51, and/or the voltage at the first end of the second switch 52 needs to be higher than the voltage at the control end of the second switch 52, and since the voltage output by the first output terminal 31 and the second output terminal 32 after the pressure detection sensor 3 is turned off is 0V or U1, and the voltage output by the first output terminal 31 and the second output terminal 32 when the pressure detection sensor 3 is not turned off is U1/2, the first switch 51 or the second switch 52 needs to be turned off after the pressure detection sensor 3 is turned off, and when the pressure detection sensor 3 is not turned off, the first switch 51 or the second switch 52 needs to be turned on, so that U1/2 < U2 < U1.
For the detection circuit shown in fig. 2, the detection method comprises the following steps: in the detection stage, the signal terminal 6 outputs a second electrical signal, the first detection terminal 41 inputs a first electrical signal to the first input terminal 31, the second detection terminal 42 inputs a low-potential signal to the second input terminal 32, the plurality of gate driving units 7 output a scan signal, and the plurality of data lines 9 output a data signal to one end of the source-drain metal layer on the corresponding column.
Specifically, as shown in fig. 2, in the detection phase, the signal terminal 6 provides a second electrical signal to the control terminal of the first switch 51 and the control terminal of the second switch 52, so that the first switch 51 and the second switch 52 are turned on, the first detection terminal 41 provides a first electrical signal to the pressure detection sensor 3 through the first input terminal 31, so that the first output terminal 33 and the second output terminal 34 output electrical signals, if the pressure detection sensor 3 is not open, the voltage values corresponding to the electrical signals output by the first output terminal 33 and the second output terminal 34 are both U1/2, since the condition that the first switch 51 is turned on is that the voltage of the control terminal of the first switch 51 is higher than the voltage of the first terminal of the first switch 51, and since U1/2 < U2, the first switch 51 and the second switch 52 are both in the on state, the first sub-gate driving unit 711 and the second sub-gate driving unit 712 can both transmit the output signals to the corresponding sub-pixel unit row, and the corresponding sub-pixel unit is caused to emit light by the data signal supplied from the data line 9, thereby causing the display panel to display an image.
Exemplarily, fig. 4 is a schematic structural diagram of a pressure detection sensor according to an embodiment of the present invention, and as shown in fig. 4, the pressure detection sensor 3 further includes: the circuit comprises a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4 which are sequentially connected end to end; the first input terminal 31 is a connection terminal between the first resistor R1 and the second resistor R2, the second input terminal 32 is a connection terminal between the third resistor R3 and the fourth resistor R4, the first output terminal 33 is a connection terminal between the first resistor R1 and the third resistor R3, and the second output terminal 34 is a connection terminal between the second resistor R2 and the fourth resistor R4.
Specifically, the ratio of the first resistor R1 to the third resistor R3 is equal to the ratio of the second resistor R2 to the fourth resistor R4, when the display panel is subjected to an external pressure, the touch display panel deforms, then R1, R2, R3, and R4 arranged on the display panel deform, so that the resistance value of the touch display panel changes, the ratio of the first resistor R1 to the third resistor R3 is no longer equal to the ratio of the second resistor R2 to the fourth resistor R4, so that the first output end 33 and the second output end 34 output different electric signals, and the magnitude of the pressure value of the external to the display panel can be determined based on the electric signals output by the first output end 33 and the second output end 34. Referring to fig. 2, in the testing phase, the display panel is not subjected to the external pressure, so that the first output terminal 33 and the second output terminal 34 output the electrical signals with the same voltage, that is, the voltage values of the electrical signals output by the first output terminal 33 and the second output terminal 34 are both U1/2, since the first switch 51 is turned on if the voltage at the control terminal of the first switch 51 is higher than the voltage at the first terminal of the first switch 51, the second switch 52 is turned on if the voltage at the control terminal of the second switch 52 is higher than the voltage at the first terminal of the second switch 52, and since U1/2 < U2, the first switch 51 and the second switch 52 are both in the on state, the first sub-gate driving unit 711 and the second sub-gate driving unit 712 can both transmit the output signals to the corresponding sub-pixel unit rows, and under the action of the data signal provided by the data line 9, and enabling the corresponding sub-pixel unit to emit light, thereby enabling the display panel to display images.
As shown in fig. 2 and 4, if the pressure detecting sensor 3 is disconnected, taking the first resistor R1 as an example, after the signal terminal 6 provides the first electrical signal, the first switch 51 is turned on, and the second input terminal 32 is grounded through the second detecting terminal 42, so that the output terminal of the first sub-gate driving unit 711 is also grounded, and further the first sub-gate driving unit 711 cannot transmit the signal to the corresponding sub-pixel unit row, so that the corresponding sub-pixel unit row cannot emit light, fig. 5 is a display schematic diagram of a display panel according to an embodiment of the present invention, where, as shown in fig. 5, the first resistor R1 in the pressure detecting sensor 3011 is disconnected, and after the first resistor R1 of the pressure detecting sensor 301 is disconnected, the display effect of the display panel is as shown in fig. 5.
As shown in fig. 2 and 4, taking the third resistor R3 as an example of an open circuit, after the first electrical signal is provided at the signal terminal 6, the first switch 51 is turned on, and the third resistor R3 is turned off, so that the electrical signal output by the first output terminal 33 is U1, and U2 < U1, since the condition that the first switch 51 is turned on is that the voltage of the control terminal of the first switch 51 is higher than the voltage of the first terminal of the first switch 51, when U2 < U1, the first switch 51 is turned off, so that the first sub-gate driving unit 711 cannot output a signal to the corresponding sub-pixel unit row, and the corresponding sub-pixel unit row cannot emit light, and after the third resistor R3 of the pressure detection sensor 301 is turned off, the display effect of the display panel is as shown in fig. 5.
It should be noted that, when the second resistor R2 is disconnected, the principle is the same as that of the first resistor R1, and the description is omitted; when the fourth resistor R4 is open-circuited, the principle is the same as that of the third resistor R3, and thus the description is omitted; therefore, when the second resistor R2 is broken, reference may be made to the description of the first resistor R1, and when the fourth resistor R4 is broken, reference may be made to the description of the third resistor R3, which is not described in detail herein.
Further, after pressure detection sensor 3 breaks circuit, when detecting, the sub-pixel unit on the corresponding row can not emit light, other sub-pixel units on the display panel emit light under the effect of gate drive unit 7, and then make the display panel appear dark line, the concrete situation can refer to that shown in fig. 5, thereby can judge whether pressure detection sensor 3 breaks circuit according to whether the dark line appears on the display panel, and can also judge which pressure detection sensor 3 breaks circuit according to the position of dark line, consequently, after adopting the above design, can just can confirm whether there is the pressure detection sensor 3 that breaks circuit in the display panel through once detecting, thereby be favorable to improving display panel's detection efficiency.
To sum up, the voltage corresponding to the first electrical signal is U1, the voltage corresponding to the second electrical signal is U2, and when U1/2 < U2 < U1, the characteristic that the first switch 51 and the second switch 52 are turned on or off is utilized, so that after the pressure detection sensor 3 is disconnected, a dark line appears at the position corresponding to the display panel, which is beneficial to conveniently detecting whether the pressure detection sensor 3 is disconnected.
Alternatively, as shown in fig. 2, the first switch 51 and the second switch 52 are N-type thin film transistors.
Specifically, the N-type thin film transistor can be turned off when the voltage at one end is higher than the voltage at the control end, so that the first switch 51 and the second switch 52 are N-type thin film transistors, and when the pressure detection sensor 3 is turned off, the signal output by the gate driving unit 7 cannot be transmitted to the corresponding sub-pixel unit row, thereby achieving the purpose of determining whether the pressure detection sensor 3 with the turned-off state exists in the display panel.
It should be noted that, other types of switches may be used as the first switch 51 and the second switch 52, and are not limited in particular, and it is an object of the embodiment of the present invention that the first switch 51 and the second switch 52 are turned off when the pressure detection sensor 3 is disconnected, so that switches capable of implementing the above functions all belong to the protection scope of the embodiment of the present invention.
Alternatively, as shown in fig. 4, the resistance values of the first resistor R1, the second resistor R2, the third resistor R3 and the fourth resistor R4 are all equal, as shown in fig. 1, the voltage of the first electrical signal is U1, 12V < U1 < 16V, and the voltage of the signal terminal 6 is U2, 6V < U2 < 10V.
Specifically, the on-voltage of the sub-pixel unit in the display panel is 6V to 8V, as shown in fig. 4, the resistance values of the first resistor R1, the second resistor R2, the third resistor R3 and the fourth resistor R4 are all equal, as shown in fig. 1, when the voltage of the first electrical signal is U1, 12V < U1 < 16V, and the pressure detection sensor 3 is not turned off, the voltage of the electrical signals output by the first output terminal 33 and the second output terminal 34 is 6V to 8V, since the voltage of the control terminal of the first switch 51 is on when the voltage is higher than the voltage of the first terminal of the first switch 51, and the voltage of the control terminal of the second switch 52 is on when the voltage is higher than the voltage of the first terminal of the second switch 52, the voltage of the signal terminal 6 is U2, 6V < U2 < 10V, and when the voltage of the U2 is higher than the voltage of the electrical signals output by the first output terminal 33 and the second output terminal 34, the first switch 51 and the second switch 52 can be turned on, after the electrical signals output by the first output terminal 33 and the second output terminal 34 are transmitted to the corresponding sub-pixel unit row, the sub-pixel unit row can be turned on, and the corresponding sub-pixel unit emits light under the action of the data signal output by the corresponding data line 9, when the pressure detection sensor 3 is in an open circuit, the voltage of the electrical signal output by the first output terminal 33 and/or the second output terminal 34 is U1, the first switch 51 and/or the second switch 52 is turned off, or the corresponding gate driving unit 7 is grounded, the gate driving unit 7 cannot output a signal to the corresponding sub-pixel unit row (the specific principle is described in detail above, and will not be described in detail herein), and the corresponding sub-pixel unit row cannot be turned on, so that whether the pressure detection sensor 3 is in an open circuit can be determined according to whether a dark line appears on the display panel, and can also judge which pressure detection sensor 3 takes place the broken circuit according to the position of the dark line, therefore after adopting above-mentioned design, can confirm whether there is the pressure detection sensor 3 that takes place the broken circuit in the display panel through once detecting to be favorable to improving display panel's detection efficiency.
Alternatively, as shown in fig. 2, the control terminal of the first switch 51 and the control terminal of the second switch 52 are electrically connected to the same signal terminal 6.
Specifically, as shown in fig. 2, after the control terminal of the first switch 51 and the control terminal of the second switch 52 are connected to the same signal terminal 6, the first switch 51 and the second switch 52 can be simultaneously controlled by one signal terminal 6, so that the number of wires of the display panel can be reduced, which is beneficial to reducing the wiring complexity of the display panel, and the first switch 51 and the second switch 52 are simultaneously controlled by one signal terminal 6, which is beneficial to reducing the control difficulty of the first switch 51 and the second switch 52.
Alternatively, as shown in fig. 2, the first output terminal 33 multiplexes the first signal output line of the pressure detection sensor 3 to be coupled to the first terminal of the first switch 51; the second output terminal 34 is coupled to a second signal output line of the multiplexed pressure detection sensor 3 and a first terminal of the second switch 52.
Specifically, as shown in fig. 2, when the first output terminal 33 multiplexes the first signal output line of the pressure detection sensor 3 and is coupled to the first terminal of the first switch 51, and the second output terminal 34 multiplexes the second signal output line of the pressure detection sensor 3 and is coupled to the first terminal of the second switch 52, it is not necessary to separately provide wires between the first output terminal 33 and the first switch 51, and between the second output terminal 34 and the second switch 52, which can reduce the number of wires of the display panel, and is favorable for reducing the wiring complexity of the display panel, after the detection is completed, the wires between the first output terminal 33 and the first terminal of the first switch 51, the wires between the first output terminal 33 and the first sub-gate driving unit 711, the wires between the second output terminal 34 and the first terminal of the second switch 52, and the wires between the second output terminal 34 and the second gate driving unit 72 can be disconnected, thereby making the first signal output line and the second signal output line function normally.
Optionally, fig. 6 is another enlarged schematic view of the dotted frame 8 in fig. 1, and as shown in fig. 6, the display panel further includes a plurality of scan lines 10, and each scan line 10 is electrically connected to the gate electrodes on the corresponding row.
Specifically, as shown in fig. 6, the scan lines 10 are used to provide scan signals to corresponding sub-pixel unit rows, when the detection is completed and the display panel is in the display stage, the signal terminals 6 do not provide signals for turning on the first switches 51 and the second switches 52 any more, at this time, the first switches 51 and the second switches 52 are turned off, the gate driving unit 7 transmits the scan signals to the gates of the corresponding sub-pixel unit rows through the corresponding scan lines 10, so that the sub-pixel unit rows are in the on state, and then the corresponding sub-pixel units emit light under the action of the data signals provided by the data lines 9, so that the display panel displays images.
Alternatively, as shown in fig. 1, the first pressure detection sensors 301 and the second pressure detection sensors 302 are arranged alternately in the column direction.
Specifically, the first pressure detection sensor 301 is disposed on one side of the non-display area 2, the second pressure detection sensor 302 is disposed on one side corresponding to the non-display area 2, and the first pressure detection sensor 301 and the second pressure detection sensor 302 are disposed in a staggered manner in the column direction, after the above design is adopted, the detection ranges of the plurality of pressure detection sensors 3 can cover the display panel as much as possible, the overlapping area of the detection ranges corresponding to the plurality of pressure detection sensors 3 can be reduced, which is beneficial to improving the detection accuracy of the display panel, and the coverage area of the detection ranges of the plurality of pressure detection sensors 3 is further improved, so that the range of the detection blind spot area of the display panel can be further reduced.
Fig. 7 is a schematic top view of another display panel according to an embodiment of the present invention, as shown in fig. 7, the display panel includes a plurality of pressure detecting sensors 3, the pressure detecting sensors 3 are located on two opposite sides of the non-display area 2, and the pressure detecting sensors located on different sides are symmetrically arranged along a row direction, wherein reference may be made to the contents shown in fig. 1 to 6 for the working principle and detailed description of the pressure detecting sensors 3, which are not repeated herein.
Fig. 8 is a schematic top view of a portion of a display panel according to an embodiment of the present invention, as shown in fig. 8, the display panel includes a plurality of pressure detection sensors 3, each of the pressure detection sensors 3 corresponds to a first switch 51 and a second switch 52, the first switch 51 is coupled to gates of at least two rows of sub-pixel units, and the second switch 52 is coupled to gates of at least two rows of sub-pixel units, wherein reference may be made to the contents shown in fig. 1 to 6 for the working principle and detailed description of the pressure detection sensors 3, which are not repeated herein.
Fig. 9 is a schematic structural diagram of a display device according to an embodiment of the present invention, and as shown in fig. 9, the display device includes the display panel 100. The operation principle of the display panel 100 is described in detail above, and will not be described in detail herein.
It should be noted that the display device according to the embodiment of the present invention may include, but is not limited to, a Personal Computer (PC), a Personal Digital Assistant (PDA), a wireless handheld device, a Tablet Computer (Tablet Computer), a mobile phone, an MP3 player, an MP4 player, a smart watch, an in-vehicle display, and the like.
Claims (9)
1. A display panel, comprising a display region and a non-display region, the display panel further comprising:
a plurality of pressure detection sensors, each of which includes a first input terminal, a second input terminal, a first output terminal, and a second output terminal, the first input terminal being electrically connected to the first detection terminal, the second input terminal being electrically connected to the second detection terminal;
the plurality of pressure detection sensors are positioned in the non-display area, the plurality of pressure detection sensors include a plurality of first pressure detection sensors and a plurality of second pressure detection sensors, and the plurality of first pressure detection sensors and the plurality of second pressure detection sensors are positioned on two opposite sides of the non-display area;
a plurality of first switches and a plurality of second switches, control terminals of the first switches and the second switches being coupled to a signal terminal, a first terminal of each first switch being coupled to a first output terminal of the corresponding pressure detection sensor, a first terminal of each second switch being coupled to a second output terminal of the corresponding pressure detection sensor, the plurality of first switches and the plurality of second switches being located in the non-display area, a control terminal of the first switch being turned on when a voltage of the control terminal of the first switch is higher than a voltage of the first terminal of the first switch, and a control terminal of the second switch being turned on when a voltage of the control terminal of the second switch is higher than a voltage of the first terminal of the second switch;
the plurality of gate driving units are positioned in the non-display area and comprise a first gate driving unit and a second gate driving unit, the first gate driving unit and the first pressure detection sensor are positioned at the same side, the second gate driving unit and the second pressure detection sensor are positioned at the same side, the plurality of first gate driving units are arranged along the column direction, the plurality of first gate driving units are electrically connected in a cascade manner, the plurality of second gate driving units are arranged along the column direction, the plurality of second gate driving units are electrically connected in a cascade manner, and the plurality of first gate driving units and the plurality of second gate driving units are alternately arranged along the column direction;
the plurality of gate driving units comprise a first sub-gate driving unit and a second sub-gate driving unit, the first sub-gate driving unit is coupled with the first end of the corresponding first switch, and the second end of the first switch is coupled with the gate on the row corresponding to the first sub-gate driving unit; the second sub-gate driving unit is coupled with a first end of the corresponding second switch, and a second end of the second switch is coupled with the gate on the row corresponding to the second sub-gate driving unit;
and each data line is coupled with one end of the source drain metal layer on the corresponding column.
2. The display panel of claim 1, wherein the first switch and the second switch are N-type thin film transistors.
3. The display panel according to claim 1, wherein the first detection terminal inputs a first electric signal having a voltage of U1, 12V < U1 < 16V, and the signal terminal has a voltage of U2, 6V < U2 < 10V.
4. The display panel of claim 1, wherein the control terminal of the first switch and the control terminal of the second switch are electrically connected to the same signal terminal.
5. The display panel according to claim 1, wherein the first output terminal multiplexes a first signal output line of the pressure detection sensor to be coupled to a first terminal of the first switch; the second output terminal is coupled with a second signal output line of the pressure detection sensor and a first terminal of the second switch in a multiplexing mode.
6. The display panel of claim 1, further comprising a plurality of scan lines, each scan line electrically connected to a gate electrode on a corresponding row.
7. The display panel according to claim 1, wherein the first pressure detection sensors and the second pressure detection sensors are arranged alternately in the column direction.
8. A display device characterized by comprising the display panel according to any one of claims 1 to 7.
9. A testing method applied to the display panel as claimed in any one of claims 1 to 7, wherein during a testing phase, the first testing terminal inputs a first electrical signal, the second testing terminal inputs a ground signal, the signal terminal is used for providing a second electrical signal for turning on the first switch and the second switch, the first electrical signal corresponds to a voltage of U1, the second electrical signal corresponds to a voltage of U2, U1/2 < U2 < U1, the method comprises:
in the detection stage, the signal end outputs the second electrical signal, the first detection terminal outputs the first electrical signal, the plurality of gate driving units output scanning signals, and the plurality of data lines output data signals to one end of the source/drain metal layer on the corresponding row.
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| US10977972B2 (en) | 2018-11-09 | 2021-04-13 | HKC Corporation Limited | Signal measurement circuit and measurement method therefor |
| CN109360519B (en) * | 2018-11-09 | 2020-08-11 | 惠科股份有限公司 | Signal measuring circuit and measuring method thereof |
| CN109933242B (en) * | 2019-03-19 | 2022-10-14 | 京东方科技集团股份有限公司 | Touch panel, display device and control method thereof |
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