CN108279519B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN108279519B CN108279519B CN201810245920.8A CN201810245920A CN108279519B CN 108279519 B CN108279519 B CN 108279519B CN 201810245920 A CN201810245920 A CN 201810245920A CN 108279519 B CN108279519 B CN 108279519B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/13338—Input devices, e.g. touch panels
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/40—OLEDs integrated with touch screens
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Abstract
The embodiment of the invention provides a display panel and a display device, relates to the technical field of display, and can reduce the space occupied by an output signal line of a pressure sensing sensor, so that the space utilization rate of the display panel is improved. The display panel includes: a plurality of pressure sensitive sensors; the plurality of scanning lines comprise multiplexed scanning lines corresponding to each pressure sensing sensor; the non-display area comprises at least one first dummy thin film transistor and at least one second dummy thin film transistor which are correspondingly connected with each multiplexing scanning line; a first input signal line and a second input signal line; the first input end of each pressure sensing sensor is connected to the first input signal line through at least one corresponding first dummy thin film transistor, and the second input end of each pressure sensing sensor is connected to the second input signal line through at least one corresponding second dummy thin film transistor.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel and a display device.
Background
In order to realize more various and flexible man-machine interaction modes, the current touch display panel can detect the size of pressing pressure on the panel besides the touch position. The pressure magnitude of pressing on the detection panel can be realized through adopting the forced induction sensor of wheatstone bridge principle, and under ideal state, the output signal of forced induction sensor is 0V, and when applying pressure to the panel, the panel takes place deformation, and the resistance of forced induction sensor changes, and the signal value that forced induction sensor output and panel deformation degree are relevant.
In order that the output end of the pressure-sensitive sensor is connected to the driving chip through a separate output signal line, the driving chip performs pressure detection according to the output signal of the pressure-sensitive sensor. However, since the display panel has many elements and a limited space, if the pressure-sensitive sensor is disposed in the display region, the pressure-sensitive sensor may be disposed by compressing the opening area of the pixel; if the pressure-sensitive sensor is disposed in the non-display area, the area of the non-display area is increased, which is not favorable for implementing a narrow bezel.
Disclosure of Invention
Embodiments of the present invention provide a display panel and a display device, which can reduce a space occupied by an output signal line of a pressure-sensitive sensor, thereby improving a space utilization rate of the display panel.
In one aspect, an embodiment of the present invention provides a display panel, including:
a display area and a non-display area surrounding the display area;
the display area comprises a plurality of sub-pixels defined by a plurality of scanning lines and a plurality of data lines in a crossed and insulated mode, the plurality of scanning lines are arranged along a first direction and extend along a second direction, and each scanning line extends from the display area to the non-display area;
the display panel further comprises a plurality of pressure-sensitive sensors;
the plurality of scan lines includes a multiplexed scan line corresponding to each of the pressure sensitive sensors;
the non-display area comprises at least one first dummy thin film transistor and at least one second dummy thin film transistor which are correspondingly connected with each multiplexing scanning line, and the control ends of the first dummy thin film transistor and the second dummy thin film transistor are connected with the corresponding multiplexing scanning line;
a first input signal line and a second input signal line;
a first input end of each pressure sensing sensor is connected to the first input signal line through the corresponding at least one first dummy thin film transistor, and a second input end of each pressure sensing sensor is connected to the second input signal line through the corresponding at least one second dummy thin film transistor;
the first output signal line is connected to a first output end of each pressure sensing sensor, and the second output signal line is connected to a second output end of each pressure sensing sensor.
Optionally, the display area includes a first display area and a second display area arranged along the first direction, and a width of the first display area in the second direction is smaller than a width of the second display area in the second direction;
the scanning lines corresponding to the first display area are the multiplexing scanning lines, and the scanning lines corresponding to the second display area are non-multiplexing scanning lines.
Optionally, the duration of the conducting level on each multiplexing scanning line is longer than the duration of the conducting level on each non-multiplexing scanning line.
Optionally, the duration of the conducting level on each multiplexing scanning line is X1, and X1 is less than or equal to 4.3 μ s and less than or equal to 100 μ s;
the duration of the conducting level on each non-multiplexing scanning line is X2, and X2 is more than or equal to 4.3 mu s and less than or equal to 12.9 mu s.
Optionally, the first display region comprises a plurality of rows of sub-pixels arranged along the first direction;
the second display region includes a plurality of rows of sub-pixels arranged in the first direction;
the number of any row of sub-pixels in the first display area is less than that of any row of sub-pixels in the second display area.
Optionally, in the second display area, the number of sub-pixels in any two rows is the same.
Optionally, the display area comprises two of the first display areas and one of the second display areas;
the second display area is positioned between the two first display areas;
for any one of the first display regions, the width of the first display region in the second direction gradually decreases in a direction away from the second display region.
Optionally, the display panel is a liquid crystal display panel, the liquid crystal display panel includes a display thin film transistor and a pixel electrode corresponding to each sub-pixel, a control end of the display thin film transistor is connected to the corresponding scan line, a first end of the display thin film transistor is connected to the corresponding data line, and a second end of the display thin film transistor is connected to the corresponding pixel electrode;
the impedance of the dummy thin film transistor is smaller than the impedance of the display thin film transistor.
Optionally, the width of the active layer of the dummy thin film transistor is greater than the width of the active layer of the display thin film transistor, and/or the thickness of the active layer of the dummy thin film transistor is greater than the thickness of the active layer of the display thin film transistor.
Optionally, each multiplexing scan line is connected to one first dummy thin film transistor and one second dummy thin film transistor.
Optionally, the non-display area includes a plurality of the first dummy thin film transistors and a plurality of the second dummy thin film transistors correspondingly connected to each of the multiplexing scan lines, the plurality of the first dummy thin film transistors are connected in parallel between the first input terminal of the corresponding pressure-sensitive sensor and the first input signal line, and the plurality of the second dummy thin film transistors are connected in parallel between the second input terminal of the corresponding pressure-sensitive sensor and the second input signal line.
Optionally, the forced induction sensor is wheatstone bridge type pressure sensor, wheatstone bridge type pressure sensor includes first input, second input, first output and second output, first input with it has second varistor to establish ties between the first output, first output with it has third varistor to establish ties between the second input, the second input with it has fourth varistor to establish ties between the second output, the second output with it has first varistor to establish ties between the first input.
Optionally, the pressure sensitive sensor is a silicon piezoresistive pressure sensor.
On the other hand, an embodiment of the present invention further provides a display device, including the display panel.
In the display panel and the display device in the embodiment of the invention, the pressure sensing sensors are connected with the input signal lines through the corresponding dummy thin film transistors, the pressure sensing sensors are connected with the same output signal line, and in the display process, the sub-pixels are charged through the scanning action of the scanning lines, and meanwhile, the scanning lines drive the corresponding dummy thin film transistors to be conducted in a time-sharing mode, so that the input signal lines provide bias voltages for different pressure sensing sensors in a time-sharing mode, the pressure sensing sensors work at different moments, the multiplexing of the output signal lines is realized, and an independent output signal line is not required to be arranged for each pressure sensing sensor, so that the number of the output signal lines is saved, namely, the space occupied by the output signal lines of the pressure sensing sensors is reduced, and the space utilization rate 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 structural diagram of a display panel according to an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of a portion of FIG. 1;
FIG. 3 is a schematic diagram of an equivalent circuit of the pressure sensor connection of FIG. 2;
FIG. 4 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 5 is an enlarged schematic view of a portion of the area of FIG. 4;
FIG. 6 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 7 is a schematic view of another enlarged structure of a portion of the area in FIG. 1;
FIG. 8 is a schematic diagram of an equivalent circuit of the pressure sensor connection of FIG. 7;
FIG. 9 is a schematic structural diagram of a pressure-sensitive sensor in accordance with an embodiment of the present invention;
FIG. 10 is a schematic diagram of another embodiment of a pressure sensitive sensor in accordance with the present invention;
fig. 11 is a schematic structural diagram of a display device according to an embodiment of the 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.
As shown in fig. 1, fig. 2 and fig. 3, fig. 1 is a schematic structural diagram of a display panel in an embodiment of the present invention, fig. 2 is an enlarged schematic structural diagram of a partial region in fig. 1, and fig. 3 is a schematic equivalent circuit diagram of a connection portion of a pressure-sensitive sensor in fig. 2, where an embodiment of the present invention provides a display panel, including: a display area 11 and a non-display area 12 surrounding the display area 11; the display region 11 includes a plurality of sub-pixels defined by a plurality of scan lines 21 and a plurality of data lines 22 crossing and insulated, the plurality of scan lines 21 being arranged in a first direction y and extending in a second direction x, each scan line 21 extending from the display region 11 to the non-display region 12; the display panel further comprises a plurality of pressure sensitive sensors 3; the plurality of scanning lines 21 include a multiplexed scanning line 211 corresponding to each pressure-sensitive sensor 3; the non-display area 12 includes at least one first dummy thin film transistor T1 and at least one second dummy thin film transistor T2 connected corresponding to each multiplexing scan line 211, and control terminals of the first dummy thin film transistor T1 and the second dummy thin film transistor T2 are connected to the corresponding multiplexing scan line 211; a first input signal line IL1 and a second input signal line IL 2; the first input terminal IN1 of each pressure-sensitive sensor 3 is connected to the first input signal line IL1 through a corresponding at least one first dummy thin film transistor T1, and the second input terminal IN2 of each pressure-sensitive sensor 3 is connected to the second input signal line IL2 through a corresponding at least one second dummy thin film transistor T2; a first output signal line OL1 and a second output signal line OL2, the first output signal line OL1 being connected to the first output terminal OUT1 of each pressure-sensitive sensor 3, the second output signal line OL2 being connected to the second output terminal OUT2 of each pressure-sensitive sensor 3.
Specifically, for example, in the liquid crystal display panel, in the display area 11, a pixel electrode 4 and a display thin film transistor M corresponding to each sub-pixel are provided, a first end of the display thin film transistor M is connected to a corresponding data line 22, a second end of the display thin film transistor M is connected to a corresponding pixel electrode 4, a gate of the display thin film transistor M is connected to a corresponding scan line 21, during the display process, a turn-on level is sequentially provided to the scan line 21, the display thin film transistor M is turned on under the control of the turn-on level, so that a data signal on the data line 22 is transmitted to the corresponding pixel electrode 4 through the corresponding display thin film transistor M, an electric field is formed between the pixel electrode 4 and a common electrode (not shown in the figure), and the liquid crystal is driven to deflect, so as to implement a normal display function. In the non-display area 12, a dummy thin film transistor corresponding to the multiplexing scanning line 211 may be disposed, a gate of the dummy thin film transistor is connected to the corresponding multiplexing scanning line 211, and the dummy thin film transistor is not used to implement a display function, and therefore, the dummy thin film transistor does not need to be connected to a data line or a pixel electrode, and in the embodiment of the present invention, the driving control of the pressure sensitive sensor 3 is implemented by the dummy thin film transistor. For example, the multiplexing scan line 211 is correspondingly disposed on the first row of sub-pixels, the gates of the display tfts corresponding to the first row of sub-pixels are connected to the multiplexing scan line 211, the multiplexing scan line 211 corresponding to the first row of sub-pixels corresponds to the first pressure-sensitive sensor 3, the first input terminal IN1 of the first pressure-sensitive sensor 3 is connected to the first input signal line IL1 through the first dummy tft T1 connected to the multiplexing scan line 211 corresponding to the first row of sub-pixels, and the second input terminal IN2 of the first pressure-sensitive sensor 3 is connected to the second input signal line IL2 through the second dummy tft T2 connected to the multiplexing scan line 211 corresponding to the first row of sub-pixels; the multiplexing scan line 211 is correspondingly disposed on the second row of sub-pixels, the gates of the display tfts corresponding to the second row of sub-pixels are connected to the multiplexing scan line 211, the multiplexing scan line 211 corresponding to the second row of sub-pixels corresponds to the second pressure-sensitive sensor 3, the first input terminal IN1 of the second pressure-sensitive sensor 3 is connected to the first input signal line IL1 through the first dummy tft T1 connected to the multiplexing scan line 211 corresponding to the second row of sub-pixels, and the second input terminal IN2 of the second pressure-sensitive sensor 3 is connected to the second input signal line IL2 through the second dummy tft T2 connected to the multiplexing scan line 211 corresponding to the second row of sub-pixels. In the display process, firstly, an on level is provided to the multiplexing scan line 211 corresponding to the first row of sub-pixels, and an off level is provided to the scan lines 21 corresponding to the other rows of sub-pixels, at this time, the display thin film transistors M corresponding to the first row of sub-pixels are all turned on, the data signals on the data lines 22 are transmitted to the corresponding pixel electrodes 4 through the corresponding display thin film transistors M, the first row of pixel electrodes 4 are charged, and at the same time, the first dummy thin film transistor T1 and the second dummy thin film transistor T2 corresponding to the first row of sub-pixels are turned on, so that the first input signal line IL1 and the second input signal line IL2 provide a bias voltage to the first pressure-sensing sensor 3 through the first dummy thin film transistor T1 and the second thin film transistor T2, the first pressure-sensing sensor 3 is driven to operate, the first pressure-sensing sensor 3 generates output signals at the first output terminal OUT1 and the second output terminal OUT2, the driving chip receives corresponding output signals through a first output signal line OL1 and a second output signal line OL2, and performs pressure detection according to the output signals, and meanwhile, because the scanning lines 21 except the first row of sub-pixels are all cut-off levels, the dummy thin film transistors corresponding to the sub-pixels in other rows are all cut off, that is, the pressure-sensitive sensors 3 except the first pressure-sensitive sensor 3 do not work; after the scanning of the sub-pixels in the first row is finished, the multiplexing scanning line 211 corresponding to the sub-pixels in the second row is provided with an on level, the scanning line 21 corresponding to the sub-pixels in the other row is provided with an off level, at this time, the display thin film transistors M corresponding to the sub-pixels in the second row are both turned on, the data signals on the data lines 22 are transmitted to the corresponding pixel electrodes 4 through the corresponding display thin film transistors M, the pixel electrodes 4 in the second row are charged, and at the same time, the first dummy thin film transistor T1 and the second dummy thin film transistor T2 corresponding to the sub-pixels in the second row are turned on, so that the first input signal line IL1 and the second input signal line IL2 provide a bias voltage to the second pressure-sensing sensor 3 through the first dummy thin film transistor T1 and the second dummy thin film transistor T2, the second pressure-sensing sensor 3 is driven to operate, and the second pressure-sensing sensor 3 generates output signals at the first output terminal 1 and the second output terminal 2, the driving chip receives corresponding output signals through a first output signal line OL1 and a second output signal line OL2, and performs pressure detection according to the output signals, and meanwhile, because the scanning lines 21 except the second row of sub-pixels are all cut-off levels, the dummy thin film transistors corresponding to the sub-pixels in other rows are all cut off, that is, the other pressure-sensitive sensors 3 except the second pressure-sensitive sensor 3 do not work; by analogy, the pressure detection of the plurality of pressure-sensitive sensors 3 in time sharing is realized while each row of sub-pixels is charged.
In the related art, a plurality of pressure-sensitive sensors share two output signal lines, but two output signal lines need to be separately provided for each pressure-sensitive sensor, that is, 2N +2 signal lines are required for N pressure-sensitive sensors. In the embodiment of the invention, no matter how many pressure sensing sensors are, only 4 signal lines are needed, so that the space occupied by the output signal lines of the pressure sensing sensors is reduced. It should be noted that, in the structure shown in fig. 1, the pressure-sensitive sensor 3 is located in the non-display area 12, but this is not limited in the embodiment of the present invention, and the pressure-sensitive sensor may be disposed in the display area or the non-display area, and when the pressure-sensitive sensor is disposed in the display area, because the space occupied by the output signal line of the pressure-sensitive sensor is reduced, a higher pixel aperture ratio is facilitated to be achieved, so as to improve the display effect; when the pressure sensing sensor is arranged in the non-display area, the space occupied by the output signal line of the pressure sensing sensor is reduced, so that the realization of a narrow frame is facilitated.
In the display panel in the embodiment of the invention, the pressure sensing sensors are connected with the input signal lines through the corresponding dummy thin film transistors, the pressure sensing sensors are connected with the same output signal line, and in the display process, the sub-pixels are charged through the scanning action of the scanning lines, and meanwhile, the scanning lines drive the corresponding dummy thin film transistors to be conducted in a time-sharing manner, so that the input signal lines provide bias voltages for different pressure sensing sensors in a time-sharing manner, the multiplexing of the output signal lines is realized by enabling the pressure sensing sensors to work at different moments, and an independent output signal line is not required to be arranged for each pressure sensing sensor, so that the number of the output signal lines is saved, namely, the space occupied by the output signal lines of the pressure sensing sensors is reduced, and the space utilization rate of the display panel is improved.
Alternatively, as shown in fig. 4 and fig. 5, fig. 4 is a schematic structural diagram of another display panel in an embodiment of the present invention, fig. 5 is an enlarged schematic structural diagram of a partial region in fig. 4, the display region 11 includes a first display region 111 and a second display region 112 arranged along a first direction y, and a width of the first display region 111 in the second direction x is smaller than a width of the second display region 112 in the second direction x; the scanning lines corresponding to the first display region 111 are multiplexed scanning lines 211, and the scanning lines corresponding to the second display region 112 are non-multiplexed scanning lines 212.
Specifically, in order to adapt to more application scenarios, besides the display panel with a rectangular display area, a special-shaped display panel appears, that is, the display area has an irregular shape, for example, the display panel shown in fig. 4, the top edge of the display area 11 is in an arc-shaped structure, the area corresponding to the arc-shaped structure is the first display area 111, the area below the first display area 111 is the rectangular display area, that is, the second display area 112, in the first display area 111, the width of the first display area 111 in the second direction x gradually increases from top to bottom, but is smaller than the width of the second display area 112 in the second direction x. The width of the first display region 111 in the second direction x is smaller than the width of the second display region 112 in the second direction x, that is, the number of sub-pixels for implementing a display function in any row of the first display region 111 is smaller than the number of sub-pixels for implementing a display function in any row of the second display region 112, and therefore, the number of display thin film transistors connected to each scan line in the first display region 111 is smaller than the number of display thin film transistors connected to each scan line in the second display region 112, and therefore, if the scan lines are not connected to the pressure sensitive sensors, the load of the scan lines in the first display region is smaller than that of the scan lines in the second display region, which may cause a difference between a charging effect of the sub-pixels in the first display region and a charging effect of the sub-pixels in the second display region, resulting in the same data signal, the sub-pixel brightness of the first display area is different from the sub-pixel brightness of the second display area, which causes poor display. In the display panel of the embodiment of the invention, the scanning line corresponding to the first display area 111 is the multiplexing scanning line 211, that is, in the process of scanning the sub-pixels in the first display area 111, the multiplexing scanning line 211 is not only used for driving the display thin film transistor, but also used for driving the dummy thin film transistor, and the dummy thin film transistor transmits the bias voltage to the corresponding pressure-sensitive sensor 3, so that the load of the multiplexing scanning line 211 is increased; meanwhile, since the scanning line corresponding to the second display region 112 is the non-multiplexed scanning line 212, that is, the scanning line corresponding to the second display region 112 is not used for driving the pressure-sensitive sensor 3. Therefore, according to the display panel of the embodiment of the invention, the load of the multiplexed scanning line 211 corresponding to the first display region 111 is closer to the load of the non-multiplexed scanning line 212 corresponding to the second display region 112, so that the difference between the luminance of the sub-pixel in the first display region 111 and the luminance of the sub-pixel in the second display region 112 is reduced, and the display effect is improved.
Optionally, the duration of the conducting level on each multiplexed scanning line 211 is greater than the duration of the conducting level on each non-multiplexed scanning line 212.
Specifically, the multiplexed scanning lines 211 are used for simultaneously driving the charging of the sub-pixels and the normal operation of the pressure-sensitive sensor 3, and the non-multiplexed scanning lines 212 are used only for driving the charging of the sub-pixels. The time required for charging the sub-pixels is short, and the time required for charging the pressure-sensitive sensors 3 is long, so that in order to ensure that the pressure-sensitive sensors 3 can normally work, the duration time of the conduction level on the multiplexing scanning lines 211 is set to be longer than the duration time of the conduction level on the non-multiplexing scanning lines 212, so that in the process of scanning the sub-pixels in the first display area 111, the dummy thin film transistors have long conduction time to ensure that the pressure-sensitive sensors 3 can normally work, and in the process of scanning the sub-pixels in the second display area 112, the scanning lines are only used for driving the sub-pixels to be charged, so that the display thin film transistors have short conduction time, and on the premise of ensuring that the sub-pixels can be fully charged, the scanning time is reduced as much as possible, and the refresh rate is improved.
Optionally, the duration of the conducting level on each multiplexing scanning line 211 is X1, and 4.3 μ s ≦ X1 ≦ 100 μ s; the duration of the conducting level on each non-multiplexing scanning line 212 is X2, and X2 is more than or equal to 4.3 mu s and less than or equal to 12.9 mu s.
Specifically, currently, the display panel is usually provided with 1920 rows of sub-pixels, the higher refresh frequency is 120Hz, i.e. 120 refreshes per second, the average charging time per row of sub-pixels is 4.3 μ s, the lower refresh frequency is 30Hz, i.e. 30 refreshes per second, and the average charging time per row of sub-pixels is 12.9 μ s, so that the conduction level duration of the non-multiplexed scanning line 212 used only for driving the sub-pixels for charging is between 4.3 μ s and 12.9 μ s, while the conduction level duration of the multiplexed scanning line 211 needs to be longer than that of the non-multiplexed scanning line 212, so that 4.3 μ s ≦ X1 is set, and on the other hand, for the present pressure-sensitive sensor 3, the driving time of 100 μ s is enough for the pressure-sensitive sensor 3 to operate normally, so that X1 ≦ 100 μ s is set.
Alternatively, the first display region 111 includes a plurality of rows of sub-pixels arranged in the first direction y; the second display region 112 includes a plurality of rows of sub-pixels arranged in the first direction y; the number of sub-pixels in any row in the first display region 11 is less than the number of sub-pixels in any row in the second display region 112.
Alternatively, in the second display area 112, the number of sub-pixels of any two rows is the same.
Alternatively, as shown in fig. 6, fig. 6 is a schematic structural diagram of another display panel in an embodiment of the present invention, and the display area 11 includes two first display areas 111 and one second display area 112; the second display region 112 is located between the two first display regions 111; for any one of the first display regions 111, the width of the first display region 111 in the second direction x gradually decreases in a direction away from the second display region 112.
Specifically, in the display panel structure shown in fig. 6, the number of sub-pixels in each row in the second display region 112 is the same, and the farther from the second display region 112, the smaller the number of sub-pixels in each row in the first display region 111, so that jaggies are formed at the edges, and the rectangular edges form approximately a circular display region, which can be used as a panel structure in a circular display device such as a wristwatch.
It should be noted that, the above embodiments only take the liquid crystal display panel as an example for description, but the embodiments of the present invention are not limited to the type of the display panel, and for example, in other realizable implementations, the display panel may also be an Organic Light-Emitting Diode (OLED) display panel.
Optionally, as shown in fig. 5, the display panel is a liquid crystal display panel, the liquid crystal display panel includes a display thin film transistor M and a pixel electrode 4 corresponding to each sub-pixel, a control end of the display thin film transistor M is connected to a corresponding scan line 21, a first end of the display thin film transistor M is connected to a corresponding data line 22, and a second end of the display thin film transistor M is connected to a corresponding pixel electrode 4; the impedance of the dummy thin film transistors (the first dummy thin film transistor T1 and the second dummy thin film transistor T2) is smaller than that of the display thin film transistor M.
Specifically, in the liquid crystal display panel, when the pressure-sensitive sensors 3 are driven simultaneously using the multiplexed scanning lines 211, the load of the multiplexed scanning lines 211 may exceed that of the non-multiplexed scanning lines 212 due to a large load of the pressure-sensitive sensors 3, which may further cause display defects, and therefore, in order to reduce the problem that the load of the multiplexed scanning lines 211 is large due to the pressure-sensitive sensors 3, the impedance of the dummy thin film transistors may be set smaller than that of the display thin film transistors M, thereby reducing the load of the multiplexed scanning lines 211.
Optionally, the width of the active layer of the dummy thin film transistor is greater than the width of the active layer of the display thin film transistor M, and/or the thickness of the active layer of the dummy thin film transistor is greater than the thickness of the active layer of the display thin film transistor M.
Specifically, according to the calculation formula of the impedance, the cross-sectional area of the active layer in the thin film transistor is related to the impedance of the thin film transistor, and therefore, by changing the width and/or the thickness of the active layer of the transistor, the impedance of the thin film transistor can be adjusted to reduce the impedance of the multiplexed scanning line 211, so that the impedance of the multiplexed scanning line 211 is closer to the impedance of the non-multiplexed scanning line 212.
Alternatively, each multiplexing scan line 211 is connected to one first dummy thin film transistor T1 and one second dummy thin film transistor T2, respectively.
Alternatively, as shown IN fig. 7 and 8, fig. 7 is another enlarged schematic structural diagram of a partial region IN fig. 1, fig. 8 is an equivalent circuit diagram of a connection portion of the pressure sensing sensor IN fig. 7, the non-display region 11 includes a plurality of first dummy thin film transistors T1 and a plurality of second dummy thin film transistors T2 connected corresponding to each multiplexing scan line 211, the plurality of first dummy thin film transistors T1 are connected IN parallel between the first input terminal IN1 of the corresponding pressure sensing sensor 3 and the first input signal line IL1, and the plurality of second dummy thin film transistors T2 are connected IN parallel between the second input terminal IN2 of the corresponding pressure sensing sensor 3 and the second input signal line IL 2.
Specifically, by connecting a plurality of dummy thin film transistors in parallel, the equivalent impedance of the dummy thin film transistors, that is, the load of the multiplexing scanning line 211 can be reduced as well.
Alternatively, as shown IN fig. 9, fig. 9 is a schematic structural diagram of a pressure-sensitive sensor according to an embodiment of the present invention, where the pressure-sensitive sensor is a wheatstone bridge type pressure sensor, the wheatstone bridge type pressure sensor includes a first input terminal IN1, a second input terminal IN2, a first output terminal OUT1 and a second output terminal OUT2, a second voltage-variable resistor R2 is connected IN series between the first input terminal IN1 and the first output terminal OUT1, a third voltage-variable resistor R3 is connected IN series between the first output terminal OUT1 and the second input terminal IN2, a fourth voltage-variable resistor R4 is connected IN series between the second input terminal IN2 and the second output terminal OUT3, and a first voltage-variable resistor R1 is connected IN series between the second output terminal OUT2 and the first input terminal IN 1.
Specifically, the shapes of the first voltage-variable resistor R1, the second voltage-variable resistor R2, the third voltage-variable resistor R3 and the fourth voltage-variable resistor R4 may be various, and for example, as shown in fig. 8, the pressure-sensitive sensor includes a first extending direction h1 and a second extending direction h2, the first extending direction h1 and the second extending direction h2 are arranged to intersect, a component of an extending length of the first voltage-variable resistor R1 from the first end a to the second end a 'in the first extending direction h1 is larger than a component in the second extending direction h2, a component of an extending length of the second voltage-variable resistor R2 from the first end b to the second end b' in the second extending direction h2 is larger than a component in the first extending direction h1, a component of an extending length of the third voltage-variable resistor R632 from the first end c to the second end c 'in the first extending direction h 8 is larger than a component in the second extending direction h2, and a component of the extending length of the fourth voltage-variable resistor R638 d from the first end c' to the second extending direction h2 A component in the first direction of extension h 1. The arrangement can not only enable the first voltage-variable resistor R1 and the third voltage-variable resistor R3 to sense the strain of the first extending direction h1, but also enable the second voltage-variable resistor R2 and the fourth voltage-variable resistor R4 to sense the strain of the second extending direction h2, and the area of the whole pressure sensing sensor is small, and the influence of temperature is small. When the display panel is not subjected to compressive stress perpendicular to the plane of the display panel, when the ratio of the resistance values of the first voltage-variable resistor R1 and the second voltage-variable resistor R2 is equal to the ratio of the resistance values of the fourth voltage-variable resistor R4 and the third voltage-variable resistor R3, the bridge reaches an equilibrium 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 is subjected to a compressive stress perpendicular to the plane of the display panel, the four resistors deform to cause the resistance values of the resistors to change, so that the bridge breaks the balance state, that is, the ratio of the resistance values of the first voltage-variable resistor R1 to the resistance value of the second voltage-variable resistor R2 is not equal to the ratio of the resistance values of the fourth voltage-variable resistor R4 to the resistance value of the third voltage-variable resistor R3, 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 has a corresponding relationship with 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.
Alternatively, as shown in fig. 10, fig. 10 is a schematic structural diagram of another pressure-sensitive sensor in the embodiment of the present invention, and the pressure-sensitive sensor 3 is a silicon piezoresistive pressure sensor.
Specifically, the silicon piezoresistive pressure sensor may have a quadrilateral structure, four sides of the sensor are respectively connected with the first input terminal IN1, the second input terminal IN2, the first output terminal OUT1 and the second output terminal OUT2, the first input terminal IN1 and the second input terminal IN2 are respectively connected to two opposite sides, and the first output terminal OUT1 and the second output terminal OUT2 are respectively connected to the other two opposite sides. The first input terminal IN1 and the second input terminal IN2 apply bias voltage to the silicon piezoresistive pressure sensor, when the display panel is subjected to compressive stress perpendicular to the plane of the display panel, the resistance value of the silicon piezoresistive pressure sensor changes, output signals of the first output terminal OUT1 and the second output terminal OUT2 change correspondingly, and the pressure applied to the silicon piezoresistive pressure sensor is detected through the change of the voltage on the first output terminal OUT1 and the second output terminal OUT 2.
As shown in fig. 11, fig. 11 is a schematic structural diagram of a display device according to an embodiment of the present invention, and the embodiment of the present invention further provides a display device including the display panel 100.
The specific structure and principle of the display panel 100 are the same as those of the above embodiments, and are not described herein again. The display device may be any electronic device with a display function, such as a touch display screen, a mobile phone, a tablet computer, a notebook computer, an electronic paper book, or a television.
In the display device in the embodiment of the invention, the pressure sensing sensors are connected to the input signal lines through the corresponding dummy thin film transistors, the pressure sensing sensors are connected to the same output signal line, and in the display process, the sub-pixels are charged through the scanning action of the scanning lines, and meanwhile, the scanning lines drive the corresponding dummy thin film transistors to be conducted in a time-sharing manner, so that the input signal lines provide bias voltages for different pressure sensing sensors in a time-sharing manner, the multiplexing of the output signal lines is realized by enabling the pressure sensing sensors to work at different moments, and an independent output signal line is not required to be arranged for each pressure sensing sensor, so that the number of the output signal lines is saved, namely, the space occupied by the output signal lines of the pressure sensing sensors is reduced, and the space utilization rate of the display panel is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
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 (14)
1. A display panel, comprising:
a display area and a non-display area surrounding the display area;
the display area comprises a plurality of sub-pixels defined by a plurality of scanning lines and a plurality of data lines in a crossed and insulated mode, the plurality of scanning lines are arranged along a first direction and extend along a second direction, each scanning line extends from the display area to the non-display area, and the first direction is perpendicular to the second direction;
the display panel further comprises a plurality of pressure-sensitive sensors;
the plurality of scan lines includes a multiplexed scan line corresponding to each of the pressure sensitive sensors;
the non-display area comprises at least one first dummy thin film transistor and at least one second dummy thin film transistor which are correspondingly connected with each multiplexing scanning line, and the control ends of the first dummy thin film transistor and the second dummy thin film transistor are connected with the corresponding multiplexing scanning line;
a first input signal line and a second input signal line;
a first input end of each pressure sensing sensor is connected to the first input signal line through the corresponding at least one first dummy thin film transistor, and a second input end of each pressure sensing sensor is connected to the second input signal line through the corresponding at least one second dummy thin film transistor;
the first output signal line is connected to a first output end of each pressure sensing sensor, and the second output signal line is connected to a second output end of each pressure sensing sensor.
2. The display panel according to claim 1,
the display area comprises a first display area and a second display area which are arranged along the first direction, and the width of the first display area in the second direction is smaller than that of the second display area in the second direction;
the scanning lines corresponding to the first display area are the multiplexing scanning lines, and the scanning lines corresponding to the second display area are non-multiplexing scanning lines.
3. The display panel according to claim 2,
and the duration of the conducting level on each multiplexing scanning line is longer than that on each non-multiplexing scanning line.
4. The display panel according to claim 3,
the duration time of the conducting level on each multiplexing scanning line is X1, and X1 is more than or equal to 4.3 mu s and less than or equal to 100 mu s;
the duration of the conducting level on each non-multiplexing scanning line is X2, and X2 is more than or equal to 4.3 mu s and less than or equal to 12.9 mu s.
5. The display panel according to claim 2,
the first display region includes a plurality of rows of sub-pixels arranged in the first direction;
the second display region includes a plurality of rows of sub-pixels arranged in the first direction;
the number of any row of sub-pixels in the first display area is less than that of any row of sub-pixels in the second display area.
6. The display panel according to claim 5,
in the second display area, the number of the sub-pixels in any two rows is the same.
7. The display panel according to claim 2,
the display areas comprise two first display areas and one second display area;
the second display area is positioned between the two first display areas;
for any one of the first display regions, the width of the first display region in the second direction gradually decreases in a direction away from the second display region.
8. The display panel according to claim 1,
the display panel is a liquid crystal display panel, the liquid crystal display panel comprises a display thin film transistor and a pixel electrode corresponding to each sub-pixel, the control end of the display thin film transistor is connected to the corresponding scanning line, the first end of the display thin film transistor is connected to the corresponding data line, and the second end of the display thin film transistor is connected to the corresponding pixel electrode;
the impedance of the dummy thin film transistor is smaller than the impedance of the display thin film transistor.
9. The display panel according to claim 8,
the width of the active layer of the dummy thin film transistor is greater than the width of the active layer of the display thin film transistor, and/or the thickness of the active layer of the dummy thin film transistor is greater than the thickness of the active layer of the display thin film transistor.
10. The display panel according to claim 1,
each multiplexing scanning line is correspondingly connected with one first dummy thin film transistor and one second dummy thin film transistor.
11. The display panel according to claim 1,
the non-display area includes a plurality of first dummy thin film transistors and a plurality of second dummy thin film transistors correspondingly connected to each of the multiplexing scan lines, the plurality of first dummy thin film transistors are connected in parallel between a first input terminal of a corresponding pressure-sensitive sensor and the first input signal line, and the plurality of second dummy thin film transistors are connected in parallel between a second input terminal of a corresponding pressure-sensitive sensor and the second input signal line.
12. The display panel according to claim 1,
pressure-sensitive sensor is Wheatstone bridge type pressure sensor, Wheatstone bridge type pressure sensor includes first input, second input, first output and second output, first input with it presses varistor to establish ties between the first output, first output with it has third to press varistor to establish ties between the second input, the second input with it has fourth to press varistor to establish ties between the second output, the second output with it has first to press varistor to establish ties between the first input.
13. The display panel according to claim 1,
the pressure sensor is a silicon piezoresistive pressure sensor.
14. A display device characterized by comprising the display panel according to any one of claims 1 to 13.
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| CN104238814A (en) * | 2014-09-03 | 2014-12-24 | 合肥鑫晟光电科技有限公司 | Color film substrate, manufacturing method thereof, and touch display device |
| CN107527600A (en) * | 2017-09-26 | 2017-12-29 | 厦门天马微电子有限公司 | A kind of display panel and display device |
| CN107797328A (en) * | 2017-11-30 | 2018-03-13 | 武汉天马微电子有限公司 | Display panel and display device |
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| US8325147B2 (en) * | 2008-12-19 | 2012-12-04 | Motorola Mobility Llc | Touch screen device and methods thereof configured for a plurality of resolutions |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104238814A (en) * | 2014-09-03 | 2014-12-24 | 合肥鑫晟光电科技有限公司 | Color film substrate, manufacturing method thereof, and touch display device |
| CN107527600A (en) * | 2017-09-26 | 2017-12-29 | 厦门天马微电子有限公司 | A kind of display panel and display device |
| CN107797328A (en) * | 2017-11-30 | 2018-03-13 | 武汉天马微电子有限公司 | Display panel and display device |
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