CN114093268A - Curved surface display substrate, and driving method and device thereof - Google Patents
Curved surface display substrate, and driving method and device thereof Download PDFInfo
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- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
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- G—PHYSICS
- 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
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- Electroluminescent Light Sources (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The invention provides a curved surface display substrate, a driving method and a device thereof, wherein the curved surface display substrate comprises: the substrate comprises a substrate base plate, a first substrate and a second substrate, wherein the substrate base plate is divided into a plane display area and at least one curved surface display area, and the curved surface display area is bent by a preset angle compared with the plane display area; the curved surface display area comprises at least one pressure-sensitive capacitor structure and a conversion circuit coupled with the at least one pressure-sensitive capacitor structure, and the at least one pressure-sensitive capacitor structure and the conversion circuit form a virtual key module. The method is used for integrating the keys on the screen and improving the visual effect of the curved surface display device.
Description
Technical Field
The invention relates to the technical field of display, in particular to a curved surface display substrate, and a driving method and a driving device thereof.
Background
Currently, an Organic Light-Emitting Diode (OLED) screen of a three-dimensional (3D) cover plate is accepted by the public due to its high duty ratio and superior display effect without a frame on the front side.
However, since the 3D flexible screen is bent downward to cover the side of the terminal device, the buttons originally placed on the side, such as power supply, volume, and lock screen, are pressed and placed in the space left by the non-screen area on the side, and the overall visual effect is poor.
How to improve the visual effect of the curved surface display device becomes a technical problem which needs to be solved urgently.
Disclosure of Invention
The invention provides a curved surface display substrate, a driving method and a device thereof, which are used for integrating keys on a screen and improving the visual effect of a curved surface display device.
In a first aspect, an embodiment of the present invention provides a curved display substrate, including:
the substrate comprises a substrate base plate, a first substrate and a second substrate, wherein the substrate base plate is divided into a plane display area and at least one curved surface display area, and the curved surface display area is bent by a preset angle compared with the plane display area;
the curved surface display area comprises at least one pressure-sensitive capacitor structure and a conversion circuit coupled with the at least one pressure-sensitive capacitor structure, and the at least one pressure-sensitive capacitor structure and the conversion circuit form a virtual key module.
In a possible implementation manner, one pressure-sensitive capacitor structure comprises a sensing electrode and a common electrode which are sequentially away from the substrate base plate, and a distance capable of bearing a certain deformation amount is arranged between the sensing electrode and the common electrode.
In a possible implementation manner, the at least one voltage-sensitive capacitor structure is a plurality of capacitor structures with different capacitance values connected in parallel, and the virtual key module is divided into a plurality of virtual key regions corresponding to the voltage-sensitive capacitor structures.
In a possible implementation manner, the common electrode corresponding to each of the voltage-sensitive capacitor structures is an integral structure, the sensing electrodes corresponding to each of the voltage-sensitive capacitor structures are structures separated from each other, and sizes of orthographic projection areas on the substrate are different from each other.
In a possible implementation manner, the curved display substrate includes a light emitting functional layer and a driving circuit layer, and the sensing electrode and a gate electrode or a source/drain electrode in the driving circuit layer are disposed on the same layer.
In a possible implementation manner, the curved display substrate further includes an encapsulation layer disposed on the light-emitting functional layer, and a touch functional layer disposed on a side of the encapsulation layer away from the light-emitting functional layer, and the common electrode and one of the touch electrodes in the touch functional layer are disposed on the same layer, where an orthographic projection of the encapsulation layer on the substrate and an orthographic projection of the at least one voltage-sensitive capacitor structure on the substrate do not overlap with each other.
In a possible implementation manner, a transparent optical adhesive is further disposed between the encapsulation layer and the touch functional layer, a total thickness of the transparent optical adhesive and the encapsulation layer ranges from 20 μm to 40 μm, and an orthogonal projection of the transparent optical adhesive on the substrate base plate and an orthogonal projection of the at least one pressure-sensitive capacitor structure on the substrate base plate are not overlapped with each other.
In one possible implementation, the conversion circuit includes a reset circuit, a storage capacitor, a compensation circuit, a driving transistor, and an output circuit; wherein:
the reset circuit is coupled with the grid electrode of the driving transistor and is used for loading a common voltage signal provided by the common electrode to the grid electrode of the driving transistor under the control of a first control end;
the storage capacitor is coupled between a constant voltage power supply end and the grid electrode of the driving transistor;
the compensation circuit is coupled between the grid electrode and the first electrode of the driving transistor and is used for writing the threshold voltage of the driving transistor and the common voltage signal into the storage capacitor;
the output circuit is coupled between the output end and the first pole of the driving transistor and is used for conducting under the control of the second control end;
and the second pole of the driving transistor is coupled with the constant voltage power supply end and used for outputting an electric signal corresponding to capacitance change generated by the pressure-sensitive capacitor structure through the conducted output circuit and the output end when an external force acts on the virtual key module, wherein each sensing electrode is coupled with the grid electrode of the driving transistor.
In one possible implementation, the reset circuit includes a reset transistor, a gate of the reset transistor is coupled to the first control terminal, a first pole of the reset transistor is coupled to the gate of the driving transistor, and a second pole of the reset transistor is coupled to the common electrode;
the compensation circuit comprises a compensation transistor, wherein the grid electrode of the compensation transistor is coupled with the third control end, the first pole of the compensation transistor is coupled with the grid electrode of the driving transistor, and the second pole of the compensation transistor is coupled with the first pole of the driving transistor;
the output circuit comprises an output transistor, wherein the grid electrode of the output transistor is coupled with the second control end, the first pole of the output transistor is coupled with the first pole of the driving transistor, and the second pole of the output transistor is coupled with the output end.
In a second aspect, an embodiment of the present invention provides a curved surface display device, including:
the curved display substrate as described in any of the above, and a control circuit connected to the curved display substrate via a flexible circuit board;
when external force acts on the virtual key module, the control circuit is used for receiving the electric signal change corresponding to the capacitance change generated by the pressure-sensitive capacitor structure and controlling the curved surface display substrate to execute screen display related actions according to the electric signal change.
In a third aspect, an embodiment of the present invention provides a method for driving a curved display substrate, including:
when external force acts on the virtual key module, capacitance change generated by the pressure-sensitive capacitor structure is obtained through the conversion circuit;
converting the capacitance change into an electrical signal change.
In one possible implementation, the capacitance of the voltage-sensitive capacitor structure isChange by C1Increase to (C)1+ Δ C), said converting said capacitance change into an electrical signal change, comprising:
converting the capacitance change into an electrical signal change according to the following formula:
wherein, V1Indicating a voltage signal, V, applied to a constant voltage supply terminalthRepresenting the threshold voltage of the drive transistor, C0Representing the capacitance value, V, of a storage capacitor in said conversion circuitcomRepresenting a common voltage signal, Δ V, applied to said common electrodeARepresenting the electrical signal change.
In one possible implementation manner, before the external force acts on the virtual key module, the method further includes:
in the first stage, under the control of a first control end to a reset circuit in the conversion circuit, a common voltage signal provided by the common electrode is loaded to a grid electrode of a driving transistor in the conversion circuit;
in a second stage, writing the threshold voltage of the driving transistor and the common voltage signal into a storage capacitor in the conversion circuit;
and in the third stage, the output circuit in the conversion circuit is conducted under the control of the second control end.
The invention has the following beneficial effects:
the embodiment of the invention provides a curved surface display substrate, a driving method and a device thereof, wherein the curved surface display substrate comprises a substrate, the substrate is divided into a plane display area and at least one curved surface display area, the curved surface display area is bent by a preset angle compared with the plane display area, the curved surface display area comprises at least one voltage-sensitive capacitor structure and a conversion circuit coupled with the at least one voltage-sensitive capacitor structure, and the at least one voltage-sensitive capacitor structure and the conversion circuit form a virtual key module.
Drawings
FIG. 1 is a schematic diagram illustrating a location of a physical key in the related art;
fig. 2 is a schematic structural diagram of a curved display substrate according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a curved display substrate according to an embodiment of the present invention;
fig. 4 is a top view structural diagram of a curved display substrate according to an embodiment of the present invention;
FIG. 5 is a schematic view of one of the cross-sectional structures along the MM direction in FIG. 4;
FIG. 6 is a schematic structural diagram of a curved display substrate according to an embodiment of the present invention;
FIG. 7 is a cross-sectional view taken along the MM direction in FIG. 4;
FIG. 8 is a schematic diagram of a circuit structure of a conversion circuit in a curved display substrate according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a curved-surface display device according to an embodiment of the present invention;
FIG. 10 is a flowchart of a method for driving a curved display substrate according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of deformation of a curved display substrate according to an embodiment of the present invention;
FIG. 12 is a flowchart illustrating another method for driving a curved display substrate according to an embodiment of the present invention;
fig. 13 is a timing diagram of one of the conversion circuits shown in fig. 8.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. And the embodiments and features of the embodiments may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of the word "comprise" or "comprises", and the like, in the context of this application, is intended to mean that the elements or items listed before that word, in addition to those listed after that word, do not exclude other elements or items.
It should be noted that the sizes and shapes of the figures in the drawings are not to be considered true scale, but are merely intended to schematically illustrate the present invention. And the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.
In the prior art, as shown in fig. 1, the physical key 01 is disposed in a non-screen area on a side surface of the display device, so that the overall visual effect is poor. At present, the stress sensor is attached to the back of the OLED, pressure deformation on the screen is sensed by monitoring the resistance on the stress sensor, quantification is carried out through a special bridge circuit, and the resistance change is converted into a voltage signal.
In view of this, embodiments of the present invention provide a curved display substrate, a driving method thereof and a device thereof, which are used for integrating keys on a screen to improve a visual effect of a curved display device.
Referring to fig. 2 and fig. 3, an embodiment of the invention provides a curved display substrate, which includes:
a substrate base plate 1, the substrate base plate 1 being divided into a flat display area a1 and at least one curved display area a2, the curved display area a2 being bent at a preset angle compared to the flat display area a 1;
the curved surface display area a2 includes at least one voltage-sensitive capacitor structure 2 and a conversion circuit 3 coupled to the at least one voltage-sensitive capacitor structure 2, and the at least one voltage-sensitive capacitor structure 2 and the conversion circuit 3 form a virtual key module 4.
In a specific implementation process, the substrate 1 may be a flexible substrate, and may also be a rigid substrate, which is not limited herein. The substrate base plate 1 is divided into a planar display area a1 and at least one curved display area a2, and the at least one curved display area a2 may be one or more, which is not limited herein. The distribution of the flat display area a1 and the at least one curved display area a2 may be as shown in fig. 4, and the flat display area a1 and the at least one curved display area a2 may also be laid out according to the actual application requirement, which is not limited herein. The curved display area a2 is bent by a predetermined angle compared to the flat display area a1, the predetermined angle is preset according to the actual application, and the predetermined angle can be used to represent the bending degree of the curved display substrate.
Still referring to fig. 3, the curved display area a2 includes at least one voltage-sensitive capacitor structure 2 and a conversion circuit 3 coupled to the at least one voltage-sensitive capacitor structure 2, where the number of the at least one voltage-sensitive capacitor structure 2 may be one or multiple, and may be specifically set according to the actual application requirement, and is not limited herein. The pressure deformation of the curved display substrate induced by the capacitance of the at least one pressure-sensitive capacitor structure 2 can be monitored, and the capacitance change induced by the at least one pressure-sensitive capacitor structure 2 can be converted into an electrical signal change through the conversion circuit 3, wherein the electrical signal change can be a voltage change or a current change, which is not limited herein. Therefore, the virtual key module 4 can be formed by the at least one voltage-sensitive capacitor structure 2 and the conversion circuit 3 which are arranged on the curved surface display substrate, and the virtual key module 4 can realize equivalent replacement of the entity keys in the prior art, so that the keys are effectively integrated on the screen, and the visual effect of the curved surface display device is improved.
In the embodiment of the invention, one pressure-sensitive capacitor structure 2 comprises a sensing electrode 5 and a common electrode 6 which are sequentially away from the substrate base plate 1, and a distance capable of bearing a certain deformation amount is arranged between the sensing electrode 5 and the common electrode 6.
In a specific implementation, as shown in fig. 5, which is a schematic cross-sectional view along the MM direction in fig. 4, one of the voltage-sensitive capacitor structures 2 includes a sensing electrode 5 and a common electrode 6 that are sequentially away from the substrate 1, that is, one of the voltage-sensitive capacitor structures 2 can be formed by the sensing electrode 5 and the common electrode 6. The sensing electrode 5 and the common electrode 6 are spaced apart from each other by a distance capable of bearing a certain deformation amount, so that when an external force acts on the pressure-sensitive capacitor structure 2, the sensing electrode 5 and the common electrode 6 can deform to a certain extent, and accordingly a corresponding capacitance change is generated, and the sensing of the external force is realized through the pressure-sensitive capacitor structure 2. In addition, the distance between the sensing electrode 5 and the common electrode 6, which can bear a certain deformation amount when the curved display substrate is in the non-pressed state, may be set according to the actual application requirement, and is not limited herein.
In the embodiment of the present invention, the at least one voltage-sensitive capacitor structure 2 is a plurality of capacitor structures with different capacitance values connected in parallel, and the virtual key module 4 is divided into a plurality of virtual key regions corresponding to the voltage-sensitive capacitor structures 2.
In a specific implementation process, the at least one pressure-sensitive capacitor structure 2 may be a plurality of pressure-sensitive capacitor structures, and accordingly, the at least one pressure-sensitive capacitor structure 2 may be a plurality of capacitor structures with different capacitance values connected in parallel, as shown in fig. 6, the at least one pressure-sensitive capacitor structure 2 may include five pressure-sensitive capacitor structures 2 including a to e, the pressure-sensitive capacitor structures 2 are connected in parallel, and the capacitance values of the pressure-sensitive capacitor structures are different from each other, so that when an external force acts on the virtual key module 4, the pressure-sensitive capacitor structure 2 at a corresponding position may be determined to be pressed according to a change in capacitance, and since the capacitance values of the pressure-sensitive capacitor structures 2 are different from each other, accuracy of external force sensing of the virtual key module 4 is improved. In addition, the virtual key module 4 can be divided into a plurality of virtual key areas corresponding to the pressure-sensitive capacitor structures 2, and each virtual key area can realize key control of corresponding functions of the curved-surface display substrate, so that the use performance of the curved-surface display substrate is improved.
In the embodiment of the present invention, the common electrode 6 corresponding to each of the voltage-sensitive capacitor structures 2 is an integral structure, the sensing electrodes 5 corresponding to each of the voltage-sensitive capacitor structures 2 are separated from each other, and the sizes of the orthographic projection areas on the substrate 1 are different from each other.
Still referring to fig. 6, the common electrode 6 corresponding to each voltage-sensitive capacitor structure 2 is an integral structure, in a specific implementation process, the common electrode 6 may be a metal grid structure covering the entire virtual key module 4 area, and the voltage applied to the common electrode 6 may be a reference voltage, and may be a direct current. The sensing electrodes 5 corresponding to the pressure-sensitive capacitor structures 2 may be separate structures, so that the sensing electrodes 5 do not affect each other, and the virtual key areas corresponding to the virtual key modules 4 may be divided by the sensing electrodes 5, for example, the virtual key areas corresponding to the sensing electrodes 5 may implement corresponding functions, and the functions implemented by the virtual key areas corresponding to different sensing electrodes 5 are different. In addition, the sensing electrodes 5 corresponding to the pressure-sensitive capacitor structures 2 have different orthographic projection areas on the substrate base plate 1, so that the capacitance values of the pressure-sensitive capacitor structures 2 corresponding to the sensing electrodes 5 can be ensured to be different, and the accuracy of external force sensing of the virtual key module 4 is improved.
In the embodiment of the present invention, the curved display substrate includes a light emitting functional layer and a driving circuit layer, and the sensing electrode 5 and a gate electrode or a source/drain electrode in the driving circuit layer are disposed in the same layer.
In a specific implementation process, the light-emitting functional layer may include an anode, a pixel defining layer, an organic light-emitting layer, and a cathode, the anode is disposed on the flat layer and connected to the source/drain electrodes through via holes formed in the flat layer, the pixel defining layer is disposed on the anode and the flat layer and provided with pixel openings, the pixel openings expose the anode, the organic light-emitting layer is disposed in the pixel openings, the cathode is disposed on the organic light-emitting layer, and the organic light-emitting layer emits light of corresponding color under the action of voltage applied to the anode and the cathode. The light emitting function layer includes a plurality of pixel units regularly arranged, and each pixel unit may include three sub-pixels of a red (R) sub-pixel, a green (G) sub-pixel, and a blue (B) sub-pixel. In addition, each pixel unit may further include four sub-pixels, for example, each pixel unit includes a red sub-pixel, a green sub-pixel, a blue sub-pixel, and a white sub-pixel, or each pixel unit includes a red sub-pixel, two green sub-pixels, and a blue sub-pixel. In the embodiment of the present invention, the number and arrangement of the sub-pixels in each pixel unit are not limited.
In a specific implementation, the driving circuit layer may include a transistor and a storage capacitor C0 that form a pixel driving circuit, and taking an example that each sub-pixel includes a transistor and a storage capacitor C0, the driving circuit layer of each sub-pixel may include: the structure comprises a buffer layer arranged on a substrate base plate 1, an active layer arranged on the buffer layer, a first grid insulating layer covered with the active layer, a gate electrode and a first capacitance electrode arranged on the first grid insulating layer, a second grid insulating layer covered with the gate electrode and the first capacitance electrode, a second capacitance electrode arranged on the second grid insulating layer, and an interlayer insulating layer covered with the second capacitance electrode, wherein a via hole is formed in the interlayer insulating layer, the via hole exposes the active layer, and a source electrode and a drain electrode arranged on the interlayer insulating layer are respectively connected with the active layer through the via hole and cover the flat layer with the structure. The active layer, the gate electrode, the source electrode, and the drain electrode constitute a transistor, and the first capacitor electrode and the second capacitor electrode constitute a storage capacitor C0. The buffer layer, the first gate insulating layer, the second gate insulating layer, and the interlayer insulating layer may be any one or more of silicon oxide (SiOx), silicon nitride (SiNx), and silicon oxynitride (SiON), and may be a single layer, a multilayer, or a composite layer. The active layer thin film can be made of amorphous indium gallium zinc Oxide (a-IGZO), zinc oxynitride (ZnON), Indium Zinc Tin Oxide (IZTO), amorphous silicon (a-Si), polycrystalline silicon (p-Si), hexathiophene or polythiophene, and the like, i.e., the embodiment of the invention is suitable for transistors manufactured based on Oxide (Oxide) technology, silicon technology or organic matter technology.
In a specific implementation process, the sensing electrode 5 and the gate electrode or the source/drain electrode in the driving circuit layer may be arranged in the same layer, so that the manufacturing process of the curved display substrate is simplified while external force sensing is realized. It should be noted that, for the specific manufacturing process of the light emitting function layer and the driving circuit layer, reference may be made to implementation in the related art, and details are not described herein.
In an embodiment of the present invention, as shown in fig. 7, the curved display substrate further includes an encapsulation layer 7 disposed on the light-emitting functional layer, and a touch functional layer 8 disposed on a side of the encapsulation layer 7 away from the light-emitting functional layer, and the common electrode 6 and one of the touch electrodes in the touch functional layer 8 are disposed on the same layer, where an orthographic projection of the encapsulation layer 7 on the substrate 1 and an orthographic projection of the at least one voltage-sensitive capacitor structure 2 on the substrate 1 are not overlapped with each other.
Still referring to fig. 7, the curved display substrate further includes an encapsulation layer 7 disposed on the light-emitting functional layer, and a touch functional layer 8 disposed on a side of the encapsulation layer 7 away from the light-emitting functional layer, where the touch functional layer 8 includes a bridge layer, an insulating layer, and a touch layer sequentially away from the light-emitting functional layer, and the touch layer includes a plurality of first touch electrodes and a plurality of second touch electrodes. Wherein the first touch electrode may be a driving electrode (Tx), the second touch electrode may be a sensing electrode (Rx), the first touch electrode may be a sensing electrode (Rx), and the second touch electrode may be a driving electrode (Tx). The common electrode 6 may be disposed on the same layer as one of the touch electrodes in the touch functional layer 8, for example, the common electrode 6 may be disposed on the same layer as a first touch electrode in the touch functional layer 8, and the common electrode 6 may also be disposed on the same layer as a second touch electrode in the touch functional layer 8, so that the manufacturing process of the curved display substrate is simplified while external force sensing is achieved.
In addition, encapsulation layer 7 can include deviating from in proper order first inorganic layer, organic layer and the inorganic layer of second of luminous functional layer, through encapsulation layer 7 can prevent that external steam from getting into luminous functional layer has improved curved surface display substrate's performance. The touch control functional layer 8 is arranged on the packaging layer 7, is far away from a backboard and a metal layer in the vapor deposition coating layer, has small parasitic capacitance, avoids the influence on the circuit speed and the signal loss, and improves the touch control precision of the curved surface display substrate while ensuring the external force sensing.
In the embodiment of the present invention, as shown in fig. 7, a transparent optical adhesive 9 is further disposed between the encapsulation layer 7 and the touch functional layer 8, a total thickness of the transparent optical adhesive 9 and the encapsulation layer 7 ranges from 20 μm to 40 μm, wherein an orthographic projection of the transparent optical adhesive 9 on the substrate base 1 and an orthographic projection of the at least one pressure-sensitive capacitor structure 2 on the substrate base 1 do not overlap with each other.
Still referring to fig. 7, a transparent optical Adhesive 9 (OCA) is further disposed between the encapsulation layer 7 and the touch functional layer 8, a total thickness of the transparent optical Adhesive 9 and the encapsulation layer 7 ranges from 20 μm to 40 μm, and a thickness of the transparent optical Adhesive 9 and a thickness of the encapsulation layer 7 may be set according to actual application requirements. Therefore, a certain distance capable of bearing certain deformation is ensured between the sensing electrode 5 and the common electrode 6 through the transparent optical cement 9 and the packaging layer 7 with certain thicknesses. In addition, the orthographic projection of the transparent optical adhesive 9 on the substrate base plate 1 and the orthographic projection of the at least one pressure-sensitive capacitor structure 2 on the substrate base plate 1 are not overlapped, the orthographic projection of the packaging layer 7 on the substrate base plate 1 and the orthographic projection of the at least one pressure-sensitive capacitor structure 2 on the substrate base plate 1 are not overlapped, the sensing electrode 5 and the common electrode 6 are guaranteed to have a certain deformation-bearing distance, meanwhile, the packaging layer 7 and the transparent optical adhesive 9 are prevented from influencing the at least one pressure-sensitive capacitor structure 2, and the sensing precision of the virtual key module 4 on external force is improved.
It should be noted that, in the specific implementation process, the curved display substrate may further include an amplifying circuit and a denoising circuit coupled to the conversion circuit 3, and the amplifying circuit may amplify the change of the electrical signal output by the conversion circuit 3, so as to avoid noise interference. In addition, noise in the sensor can be removed through the denoising circuit, and therefore sensing accuracy of the external force is guaranteed. Of course, other circuits coupled to the conversion circuit 3 may be provided according to the actual application requirement to improve the quality of the electrical signal variation, and will not be described in detail herein.
In the embodiment of the present invention, as shown in fig. 8, the conversion circuit 3 includes a reset circuit 10, a storage capacitor C0, a compensation circuit 20, a driving transistor DT, and an output circuit 30; wherein:
the reset circuit 10 is coupled to the gate of the driving transistor DT and is configured to apply the common voltage signal Vcom provided by the common electrode 6 to the gate of the driving transistor DT under the control of the first control terminal S1;
the storage capacitor C0 is coupled between a constant voltage power source terminal VD and the gate of the driving transistor DT;
the compensation circuit 20 is coupled between the gate and the first pole of the driving transistor DT, and is used for writing the threshold voltage of the driving transistor DT and the common voltage signal Vcom into the storage capacitor C0;
the output circuit 30 is coupled between the output terminal Vout and the first pole of the driving transistor DT, and is controlled by a second control terminal S2 to be turned on;
the second pole of the driving transistor DT is coupled to the constant voltage power source VD, and is configured to output an electrical signal corresponding to a capacitance change generated by the voltage-sensitive capacitor structure 2 through the turned-on output circuit 30 and the turned-on output terminal Vout when an external force is applied to the virtual key module 4, wherein each of the sensing electrodes 5 is coupled to the gate of the driving transistor DT.
Still referring to fig. 8, the reset circuit 10 coupled to the gate of the driving transistor DT can apply the common voltage signal Vcom provided by the common electrode 6 to the gate of the driving transistor DT (as shown in fig. 8 at point a) under the control of the first control terminal S1, so that the reset circuit 10 can reset the gate voltage of the driving transistor DT. The conversion circuit 3 further includes a storage capacitor C0 coupled between a constant voltage power source terminal VD and the gate of the driving transistor DT, and the compensation circuit 20 coupled between the gate and the first pole of the driving transistor DT. The constant voltage power supply terminal VD may be a high potential power supply terminal and may provide a constant high potential signal. After the compensation circuit 20 and the driving transistor DT are both turned on, the gate of the driving transistor DT may be charged according to the voltage signal V1 provided from the constant voltage power source terminal VD, and the threshold voltage of the driving transistor DT and the voltage signal V1 are written into the gate of the driving transistor DT so that the voltage of the gate of the driving transistor DT becomes (V1+ Vth); wherein Vth represents a threshold voltage of the driving transistor DT, and V1 represents a voltage signal supplied from the constant voltage power source terminal VD. The signal written to the gate of the driving transistor DT may also be stored in the storage capacitor C0. The output circuit 30 coupled between the output terminal Vout and the first pole of the driving transistor DT may be turned on under the control of the second control terminal S2. The second pole of the driving transistor DT is coupled to the constant voltage power source terminal VD, and when an external force acts on the virtual key module 4, the driving transistor DT can couple an electrical signal corresponding to a capacitance change generated by the corresponding voltage-sensitive capacitor structure 2 to the output circuit 30 and the output terminal Vout. Further, after the current path of the driving transistor DT and the output circuit 30 is formed, the driving transistor DT generates a driving current by the action of the storage capacitor C0 and the pressure sensitive capacitor structure 2 releasing the written signal, thereby outputting an electric signal. In this way, the capacitance change generated by the pressure-sensitive capacitor structure 2 acting on the virtual key module 4 by the external force is converted into an electrical signal change by the conversion circuit 3. It should be noted that "C1" in fig. 8 is a capacitance structure formed by at least one pressure-sensitive capacitance structure 2, and the capacitance structure formed by the pressure-sensitive capacitance structure is similar to a variable capacitor because it can have different capacitance values during the pressing process.
In the embodiment of the present invention, still referring to fig. 8, the reset circuit 10 includes a reset transistor T1, the gate of the reset transistor T1 is coupled to the first control terminal S1, the first pole of the reset transistor T1 is coupled to the gate of the driving transistor DT, and the second pole of the reset transistor T1 is coupled to the common electrode 6;
the compensation circuit 20 includes a compensation transistor T2, a gate of the compensation transistor T2 is coupled to the third control terminal S3, a first pole of the compensation transistor T2 is coupled to the gate of the driving transistor DT, and a second pole of the compensation transistor T2 is coupled to the first pole of the driving transistor DT;
the output circuit 30 includes an output transistor T3, a gate of the output transistor T3 is coupled to the second control terminal S2, a first pole of the output transistor T3 is coupled to the first pole of the driving transistor DT, and a second pole of the output transistor T3 is coupled to the output terminal Vout.
In a specific implementation process, the transistors mentioned above may be all P-type transistors, and may also be all N-type transistors, which is not limited herein. When any transistor is a P-type transistor, the transistor is turned off when the control signal loaded to the transistor is at a high level, and the transistor is turned on when the control signal loaded to the transistor is at a low level; when any one of the transistors is an N-type transistor, the transistor is turned on when the control signal applied to the transistor is at a high level, and the transistor is turned off when the control signal applied to the transistor is at a low level.
It should be noted that the first pole and the second pole of each transistor mentioned above may have their functions interchanged according to the corresponding type and the signal at the signal terminal. For example, the first electrode may be a source, and the second electrode may be a drain, and for example, the first electrode may be a drain, and the second electrode may be a source, which is not limited herein.
The specific structure of each circuit in the driving circuit provided in the embodiment of the present invention is merely illustrated, and in implementation, the specific structure of the circuit is not limited to the structure provided in the embodiment of the present invention, and may be other structures known to those skilled in the art, which are within the protection scope of the present invention, and are not limited herein. For the structure of the uncommitted film layer in the curved display substrate, such as the cover plate, the electromagnetic shielding film, etc., other structures known to those skilled in the art may also be adopted, which are within the scope of the present invention and are not limited herein.
Based on the same inventive concept, as shown in fig. 9, an embodiment of the present invention further provides a curved surface display device, including:
the curved display substrate 100 as described in any of the above, and a control circuit 300 connected to the curved display substrate 100 through a flexible circuit board 200;
when an external force acts on the virtual key module 4, the control circuit 300 is configured to receive an electrical signal change corresponding to a capacitance change occurring in the pressure-sensitive capacitor structure 2, and control the curved display substrate 100 to execute a screen display related action according to the electrical signal change.
Still referring to fig. 9, the control circuit 300 is coupled to the conversion circuit 3, when an external force acts on the virtual key module 4, the pressure-sensitive capacitor structure 2 generates a capacitance change, the conversion circuit 3 converts the capacitance change into an electrical signal change, and sends the electrical signal change to the control circuit 300, and the control circuit 300 may control the curved surface display substrate 100 to execute screen display related actions, such as volume adjustment, power on/off adjustment, and the like, according to the electrical signal change, which is not limited herein.
The principle of solving the problems of the curved display device is similar to that of the curved display substrate 100, so the implementation of the curved display device can be referred to the implementation of the curved display substrate 100, and repeated descriptions are omitted.
In a specific implementation process, the curved surface display device provided by the embodiment of the invention can be a mobile phone, and can also be any product or component with a display function, such as a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. Other essential components of the curved display device are understood by those skilled in the art, and are not described herein again, nor should they be construed as limiting the present invention.
Based on the same inventive concept, as shown in fig. 10, an embodiment of the present invention further provides a method for driving a curved display substrate, including:
s101: when external force acts on the virtual key module, capacitance change generated by the pressure-sensitive capacitor structure is obtained through the conversion circuit;
s102: converting the capacitance change into an electrical signal change.
In the specific implementation process, the specific implementation process from step S101 to step S102 is as follows:
when an external force acts on the virtual key module 4, that is, when the external force presses the virtual key module 4, the pressure-sensitive capacitor structure 2 at the corresponding position is deformed as shown in fig. 11, a direction indicated by an arrow X in fig. 11 is a direction in which the virtual key module 4 is pressed by the external force, accordingly, a distance between the sensing electrode 5 and the common electrode 6 corresponding to the pressure-sensitive capacitor structure 2 is shortened, and a capacitance value corresponding to the pressure-sensitive capacitor structure 2 is increased; for example, on the premise that the total amount of charges charged into the voltage-sensitive capacitor structure 2 is determined, the potential difference between the sensing electrode 5 and the common electrode 6 is reduced; for another example, on the premise that the potential difference between the sensing electrode 5 and the common electrode 6 corresponding to the voltage-sensitive capacitor structure 2 is not changed, the total amount of charges on the voltage-sensitive capacitor structure 2 is increased. In this way, a current can be generated on the wire connected to the sensing electrode 5. The voltage difference caused by the deformation of the pressure-sensitive capacitor structure 2 or the voltage drop and other electrical signal changes generated by the current can be distinguished by the conversion circuit 3, the capacitance changes caused by the pressure-sensitive capacitor structure 2 are converted into electrical signal changes through the conversion circuit 3, and the electrical signal changes are subsequently amplified, de-noised and the like, and then conducted to a control circuit through related metal wires in the curved surface display substrate and a flexible circuit board, so that actions such as screen locking and unlocking, volume adjustment and the like are triggered.
In the embodiment of the invention, if the capacitance change of the voltage-sensitive capacitor structure 2 is changed by C1Increase to (C)1+ Δ C), said converting said capacitance change into an electrical signal change, comprising:
converting the capacitance change into an electrical signal change according to the following formula:
wherein, V1Representing a voltage signal, V, applied to a constant voltage supply terminal VDthRepresents the threshold voltage of the driving transistor DT, C0Represents the capacitance value, V, of the storage capacitor C0 in the conversion circuit 3comRepresenting a common voltage signal, Δ V, applied to said common electrode 6ARepresenting the electrical signal change.
In an embodiment of the present invention, as shown in fig. 12, before the external force acts on the virtual key module 4, that is, when the external force does not press the virtual case module, the method further includes:
s201: in the first stage, under the control of a first control end to a reset circuit in the conversion circuit, a common voltage signal provided by the common electrode is loaded to a grid electrode of a driving transistor in the conversion circuit;
s202: in a second stage, writing the threshold voltage of the driving transistor and the common voltage signal into a storage capacitor in the conversion circuit;
s203: and in the third stage, the output circuit in the conversion circuit is conducted under the control of the second control end.
For the specific implementation of steps S201 to S203, the following description is made in conjunction with the conversion circuit 3 shown in fig. 8 and the timing chart shown in fig. 13, where "0" represents low potential and "1" represents high potential:
first stage t 1: s1 ═ 0; s2 ═ 1; s3 ═ 1;
in the first phase T1, under the control of the low potential signal loaded by the first control terminal S1, the reset transistor T1 is turned on, the compensation transistor T2 and the output transistor T3 are turned off, and the common voltage signal Vcom provided by the common electrode is loaded to the gate of the driving transistor DT, so that the a-point potential is reset to Vcom;
second stage t 2: s1 ═ 1; s2 ═ 1; s3 ═ 0;
in the second stage T2, under the control of the low-potential signal loaded at the third control terminal S3, the compensation transistor T2 is turned on, the driving transistor DT is in a diode connection state, the driving transistor DT and the common voltage signal Vcom are written into the storage capacitor C0 in the conversion circuit, the potential at the point a is gradually increased to V1+ Vth, and at this time, no current flows through the driving transistor DT;
third stage t 3: s1 ═ 1; s2 ═ 0; s3 ═ 1;
in the third stage T3, under the control of the low-potential signal applied to the second control terminal S2, the output transistor T3 is turned on, at this time, Vgs of the driving transistor becomes Vth, and the driving transistor DT does not flow current.
In the specific implementation process, when the virtual key module 4 is pressed by external force, if the capacitance change of the pressure-sensitive capacitor structure 2 is changed from C1Increase to (C)1+ Δ C), i.e. C1Increase by aC, in this case, the potential at the point A is:
thus, the electrical signal at point a changes as:
it can be seen that Vgs of the drive transistor DT decreases, a through current I is generated on the drive transistor DTDTAs shown in fig. 13, the magnitude of the current is related to the capacitance change, so that the recognition of different external pressing forces can be realized.
The embodiment of the invention provides a curved surface display substrate, a driving method and a device thereof, wherein the curved surface display substrate comprises a substrate base plate 1, the substrate base plate 1 is divided into a flat display area a1 and at least one curved display area a2, the curved display area a2 is bent at a predetermined angle compared to the flat display area a1, the curved display area a2 includes at least one voltage-dependent capacitor structure 2 and a conversion circuit 3 coupled to the at least one voltage-dependent capacitor structure 2, the at least one pressure-sensitive capacitor structure 2 and the conversion circuit 3 form a virtual key module 4, that is, the virtual key module 4 formed by at least one pressure-sensitive capacitor structure 2 and a conversion circuit 3 arranged on the curved surface display substrate realizes the equivalent replacement of the entity key, therefore, the keys are effectively integrated on the screen, and the visual effect of the curved surface display device is improved.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (13)
1. A curved display substrate, comprising:
the substrate comprises a substrate base plate, a first substrate and a second substrate, wherein the substrate base plate is divided into a plane display area and at least one curved surface display area, and the curved surface display area is bent by a preset angle compared with the plane display area;
the curved surface display area comprises at least one pressure-sensitive capacitor structure and a conversion circuit coupled with the at least one pressure-sensitive capacitor structure, and the at least one pressure-sensitive capacitor structure and the conversion circuit form a virtual key module.
2. The curved display substrate of claim 1, wherein one of said voltage-sensitive capacitor structures comprises a sensing electrode and a common electrode facing away from said substrate in sequence, said sensing electrode and said common electrode having a spacing therebetween capable of withstanding a certain amount of deformation.
3. The curved display substrate of claim 2, wherein the at least one voltage-sensitive capacitor structure is a plurality of capacitor structures with different capacitance values connected in parallel, and the virtual key module is divided into a plurality of virtual key regions corresponding to the voltage-sensitive capacitor structures.
4. The curved display substrate according to claim 3, wherein the common electrode corresponding to each of the voltage-sensitive capacitor structures is an integral structure, the sensing electrodes corresponding to each of the voltage-sensitive capacitor structures are separate structures, and the sizes of the orthographic projection areas on the substrate are different from each other.
5. The curved display substrate according to any one of claims 2 to 4, wherein the curved display substrate comprises a light emitting functional layer and a driving circuit layer, and the sensing electrode is disposed in the same layer as a gate electrode or a source/drain electrode in the driving circuit layer.
6. The curved display substrate of claim 5, wherein the curved display substrate further comprises an encapsulation layer disposed on the light-emitting functional layer, and a touch functional layer disposed on a side of the encapsulation layer facing away from the light-emitting functional layer, and the common electrode and one of the touch electrodes in the touch functional layer are disposed in the same layer, wherein an orthographic projection of the encapsulation layer on the substrate and an orthographic projection of the at least one pressure-sensitive capacitor structure on the substrate do not overlap with each other.
7. The curved display substrate according to claim 6, wherein a transparent optical adhesive is further disposed between the encapsulation layer and the touch functional layer, and a total thickness of the transparent optical adhesive and the encapsulation layer ranges from 20 μm to 40 μm, wherein an orthographic projection of the transparent optical adhesive on the substrate and an orthographic projection of the at least one pressure-sensitive capacitor structure on the substrate do not overlap each other.
8. The curved display substrate of claim 7, wherein the conversion circuit comprises a reset circuit, a storage capacitor, a compensation circuit, a driving transistor, and an output circuit; wherein:
the reset circuit is coupled with the grid electrode of the driving transistor and is used for loading a common voltage signal provided by the common electrode to the grid electrode of the driving transistor under the control of a first control end;
the storage capacitor is coupled between a constant voltage power supply end and the grid electrode of the driving transistor;
the compensation circuit is coupled between the grid electrode and the first electrode of the driving transistor and is used for writing the threshold voltage of the driving transistor and the common voltage signal into the storage capacitor;
the output circuit is coupled between the output end and the first pole of the driving transistor and is used for conducting under the control of the second control end;
and the second pole of the driving transistor is coupled with the constant voltage power supply end and used for outputting an electric signal corresponding to capacitance change generated by the pressure-sensitive capacitor structure through the conducted output circuit and the output end when an external force acts on the virtual key module, wherein each sensing electrode is coupled with the grid electrode of the driving transistor.
9. The curved display substrate of claim 8, wherein the reset circuit comprises a reset transistor having a gate coupled to the first control terminal, a first pole coupled to the gate of the drive transistor, and a second pole coupled to the common electrode;
the compensation circuit comprises a compensation transistor, wherein the grid electrode of the compensation transistor is coupled with the third control end, the first pole of the compensation transistor is coupled with the grid electrode of the driving transistor, and the second pole of the compensation transistor is coupled with the first pole of the driving transistor;
the output circuit comprises an output transistor, wherein the grid electrode of the output transistor is coupled with the second control end, the first pole of the output transistor is coupled with the first pole of the driving transistor, and the second pole of the output transistor is coupled with the output end.
10. A curved surface display device, comprising:
the curved display substrate according to any one of claims 1-9, and a control circuit connected to the curved display substrate via a flexible circuit board;
when external force acts on the virtual key module, the control circuit is used for receiving the electric signal change corresponding to the capacitance change generated by the pressure-sensitive capacitor structure and controlling the curved surface display substrate to execute screen display related actions according to the electric signal change.
11. A method for driving a curved display substrate according to any one of claims 1 to 9, comprising:
when external force acts on the virtual key module, capacitance change generated by the pressure-sensitive capacitor structure is obtained through the conversion circuit;
converting the capacitance change into an electrical signal change.
12. The driving method as claimed in claim 11, wherein if the capacitance change of the voltage-sensitive capacitance structure is changed by C1Increase to (C)1+ Δ C), said converting said capacitance change into an electrical signal change, comprising:
converting the capacitance change into an electrical signal change according to the following formula:
wherein, V1Indicating a voltage signal, V, applied to a constant voltage supply terminalthRepresenting the threshold voltage of the drive transistor, C0Representing the capacitance value, V, of a storage capacitor in said conversion circuitcomRepresenting a common voltage signal, Δ V, applied to said common electrodeARepresenting the electrical signal change.
13. The driving method according to claim 11, wherein before the external force acts on the virtual key module, the method further comprises:
in the first stage, under the control of a first control end to a reset circuit in the conversion circuit, a common voltage signal provided by the common electrode is loaded to a grid electrode of a driving transistor in the conversion circuit;
in a second stage, writing the threshold voltage of the driving transistor and the common voltage signal into a storage capacitor in the conversion circuit;
and in the third stage, the output circuit in the conversion circuit is conducted under the control of the second control end.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1067827A2 (en) * | 1999-06-21 | 2001-01-10 | Denso Corporation | High voltage discharge lamp apparatus for vehicles |
| RU2162239C1 (en) * | 1999-08-25 | 2001-01-20 | ООО предприятие "МЕТЕО" | Aerological radiosonde |
| KR100654358B1 (en) * | 2005-08-10 | 2006-12-08 | 삼성전자주식회사 | Semiconductor integrated circuit device and fabrication method for the same |
| US20110221676A1 (en) * | 2010-03-11 | 2011-09-15 | Sunrex Technology Corp. | Optical mouse with touch sensitive top |
| CN103293785A (en) * | 2012-12-24 | 2013-09-11 | 上海天马微电子有限公司 | TN (Twisted Nematic) LCD device and touch-control method thereof |
| US20140104507A1 (en) * | 2012-10-12 | 2014-04-17 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device and touch panel |
| CN107229375A (en) * | 2017-07-28 | 2017-10-03 | 京东方科技集团股份有限公司 | A kind of touch screen and display device |
| CN110162224A (en) * | 2018-05-31 | 2019-08-23 | 京东方科技集团股份有限公司 | Touch display substrate and its driving method, display device |
| CN112527230A (en) * | 2019-09-17 | 2021-03-19 | 华为技术有限公司 | Parameter adjusting method and electronic equipment |
-
2021
- 2021-11-29 CN CN202111428815.6A patent/CN114093268B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1067827A2 (en) * | 1999-06-21 | 2001-01-10 | Denso Corporation | High voltage discharge lamp apparatus for vehicles |
| RU2162239C1 (en) * | 1999-08-25 | 2001-01-20 | ООО предприятие "МЕТЕО" | Aerological radiosonde |
| KR100654358B1 (en) * | 2005-08-10 | 2006-12-08 | 삼성전자주식회사 | Semiconductor integrated circuit device and fabrication method for the same |
| US20110221676A1 (en) * | 2010-03-11 | 2011-09-15 | Sunrex Technology Corp. | Optical mouse with touch sensitive top |
| US20140104507A1 (en) * | 2012-10-12 | 2014-04-17 | Semiconductor Energy Laboratory Co., Ltd. | Liquid crystal display device and touch panel |
| CN103293785A (en) * | 2012-12-24 | 2013-09-11 | 上海天马微电子有限公司 | TN (Twisted Nematic) LCD device and touch-control method thereof |
| CN107229375A (en) * | 2017-07-28 | 2017-10-03 | 京东方科技集团股份有限公司 | A kind of touch screen and display device |
| CN110162224A (en) * | 2018-05-31 | 2019-08-23 | 京东方科技集团股份有限公司 | Touch display substrate and its driving method, display device |
| CN112527230A (en) * | 2019-09-17 | 2021-03-19 | 华为技术有限公司 | Parameter adjusting method and electronic equipment |
Non-Patent Citations (2)
| Title |
|---|
| ，钟龙杰: "飞法级MEMS电容型传感器读出技术研究", 《中国优秀硕士学位论文全文数据库（电子期刊）信息科技辑》, pages 140 - 24 * |
| 古铖: "新型压力传感器件及基于薄膜晶体管集成的研究", 《中国优秀硕士学位论文全文数据库（电子期刊）信息科技辑》, pages 140 - 201 * |
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