CN107340866B - Display panel, display device and acceleration detection method - Google Patents

Display panel, display device and acceleration detection method Download PDF

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CN107340866B
CN107340866B CN201710522397.4A CN201710522397A CN107340866B CN 107340866 B CN107340866 B CN 107340866B CN 201710522397 A CN201710522397 A CN 201710522397A CN 107340866 B CN107340866 B CN 107340866B
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display panel
acceleration
pressure sensor
sensing area
resistor
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CN107340866A (en
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周星耀
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Wuhan Tianma Microelectronics Co Ltd
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Wuhan Tianma Microelectronics Co Ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/011—Arrangements for interaction with the human body, e.g. for user immersion in virtual reality
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
    • G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
    • G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
    • G01P15/12—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values by alteration of electrical resistance
    • G01P15/122—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values by alteration of electrical resistance by metal resistance strain gauges, e.g. wire resistance strain gauges
    • 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
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04102—Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04105—Pressure sensors for measuring the pressure or force exerted on the touch surface without providing the touch position

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

The invention discloses a display panel, a display device and an acceleration detection method, wherein the display panel comprises a display area, an acceleration sensing area, a pressing structure, at least one pressure sensor and an operation circuit; the acceleration sensing area and the moving direction of the moving object where the display panel is located form a first included angle which is larger than 0 degree and smaller than 180 degrees; the pressure sensor is positioned in the acceleration sensing area; the pressing structure is arranged corresponding to the acceleration sensing area; the pressing structure comprises a fixed support, a pressing part and an elastic element, the fixed support is fixed on a moving object where the display panel is located, the pressing part is in contact with the acceleration sensing area of the display panel, one end of the elastic element is connected with the fixed support, and the other end of the elastic element is connected with the pressing part; the operation circuit detects the acceleration of the moving object where the display panel is located according to the pressure of the pressing part applied to the pressure sensor. By the technical scheme of the invention, on the basis of realizing acceleration detection, the problems of low yield and high cost of the acceleration sensor in the prior art are solved.

Description

Display panel, display device and acceleration detection method
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a display panel, a display device and an acceleration detection method.
Background
A Micro Electro Mechanical System (MEMS) acceleration sensor chip is an inertial measurement unit that is fabricated on a silicon wafer by a Micro-machining process. MEMS acceleration sensor chips can be classified into piezoresistive, piezoelectric, resonant, thermocouple, and capacitive types.
The manufacturing process of the MEMS acceleration sensor generally needs to hollow on a silicon substrate, a fixed electrode and a movable electrode are respectively arranged on two sides of a hollow hole, and a set capacitance value is arranged between the fixed electrode and the movable electrode. When the MEMS acceleration sensor is used for detecting the acceleration of a moving object, the position of the movable electrode moves under the action of force generated by the acceleration of the moving object, so that the capacitance value between the fixed electrode and the movable electrode of the MEMS acceleration sensor changes, the variation of the capacitance value between the fixed electrode and the movable electrode is converted into the variation of a voltage value, and the acceleration of the moving object where the MEMS acceleration sensor is located is obtained by detecting the variation of the voltage value.
However, in the manufacturing process of the MEMS acceleration sensor, a deep hole process is generally required on the silicon substrate, that is, a hole with a large depth needs to be dug on the silicon substrate, and the yield of the MEMS acceleration sensor is greatly reduced by the deep hole process. In addition, because the silicon substrate is relatively high in cost, the acceleration sensor is manufactured by adopting the silicon substrate independently, and the manufacturing cost of the acceleration sensor is increased.
Disclosure of Invention
In view of the above, the present invention provides a display panel, a display device and an acceleration detection method, which solve the problems of low yield of acceleration sensor manufacture and high cost of acceleration sensor manufacture by using silicon substrate on the basis of realizing the acceleration detection of a moving object in the prior art.
In a first aspect, an embodiment of the present invention provides a display panel, including:
a display area and an acceleration sensing area; the acceleration sensing area and the advancing direction of a moving object where the display panel is located form a first included angle, and the first included angle is larger than 0 degree and smaller than 180 degrees;
the pressing structure and the at least one pressure sensor are positioned in the acceleration sensing area; the pressing structure is arranged corresponding to the acceleration sensing area;
the pressing structure comprises a fixed support, a pressing part and an elastic element, the fixed support is fixed on a moving object where the display panel is located, the pressing part is in contact with the acceleration sensing area of the display panel, one end of the elastic element is connected with the fixed support, and the other end of the elastic element is connected with the pressing part;
and the operation circuit is used for detecting the acceleration of a moving object where the display panel is located according to the pressure of the pressure sensor on the pressing part.
In a second aspect, an embodiment of the present invention further provides a display device, including the display panel according to the first aspect.
In a third aspect, an embodiment of the present invention further provides an acceleration detection method based on the display panel in the first aspect, including:
acquiring the pressure applied to the pressure sensor;
and obtaining the acceleration of the moving object where the display panel is located according to the pressure applied to the pressure sensor and the mass of the pressing part.
The embodiment of the invention provides a display panel, a display device and an acceleration detection method, wherein a pressure sensor of the display panel is arranged in an acceleration sensing area of the display panel, a pressing structure is arranged corresponding to the acceleration sensing area and is in contact with the acceleration sensing area, meanwhile, the acceleration sensing area and the advancing direction of the object where the display panel is arranged have a first included angle which is larger than 0 degree and smaller than 180 degrees, so that when the object where the display panel is arranged moves to generate the acceleration from the acceleration sensing area to the pressing part, the pressing part can press an acceleration sensing area of the display panel, the pressure sensor arranged in the acceleration sensing area detects the pressure of the pressing part pressing the acceleration sensing area, and the operation circuit is arranged to detect the acceleration of a moving object where the display panel is located according to the pressure of the pressing part on the pressure sensor. In addition, compared with the prior art, the deep hole process in the manufacturing process of the acceleration sensor is avoided, and the problems that in the prior art, the manufacturing yield of the acceleration sensor is low and the manufacturing cost is high are solved.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 is a schematic side view of a display panel according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional structure diagram of a display panel according to an embodiment of the present invention;
FIG. 3 is a schematic side view of another display panel according to an embodiment of the present invention;
FIG. 4 is a schematic view of a geometric relationship of the pressure sensor detecting pressure when the first included angle is an acute angle;
FIG. 5 is a schematic side view of another display panel according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a pressure sensor according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of another pressure sensor provided in an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of another pressure sensor provided in accordance with an embodiment of the present invention;
FIG. 9 is a schematic structural diagram of another pressure sensor provided in accordance with an embodiment of the present invention;
FIG. 10 is a schematic structural diagram of another pressure sensor provided in accordance with an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a display device according to an embodiment of the present invention;
fig. 12 is a schematic flowchart of an acceleration detection method according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures. Throughout this specification, the same or similar reference numbers refer to the same or similar structures, elements, or processes. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The embodiment of the invention provides a display panel, which comprises a display area and an acceleration sensing area, wherein a first included angle is formed between the acceleration sensing area and the advancing direction of a moving object where the display panel is located, and the first included angle is larger than 0 degree and smaller than 180 degrees. The display panel comprises a pressing structure, at least one pressure sensor and an arithmetic circuit, wherein the pressure sensor is positioned in the acceleration sensing area; the pressing structure is arranged corresponding to the acceleration sensing area; the pressing structure comprises a fixed support, a pressing part and an elastic element, the fixed support is fixed on a moving object where the display panel is located, the pressing part is in contact with an acceleration sensing area of the display panel, one end of the elastic element is connected with the fixed support, and the other end of the elastic element is connected with the pressing part; the operation circuit is used for detecting the acceleration of a moving object where the display panel is located according to the pressure of the pressing part applied to the pressure sensor.
In the prior art, a deep hole is generally required to be dug in a silicon substrate in the manufacturing process of an MEMS acceleration sensor, a fixed electrode and a movable electrode are respectively arranged on two sides of the deep hole, and when the MEMS acceleration sensor is used for detecting the acceleration of a moving object, the acceleration of the moving object where the MEMS acceleration sensor is located is obtained through the change of a capacitance value or a voltage value between the fixed electrode and the movable electrode. However, the deep hole process greatly reduces the yield of the MEMS acceleration sensor. In addition, because the silicon substrate is relatively high in cost, the acceleration sensor is manufactured by adopting the silicon substrate independently, and the manufacturing cost of the acceleration sensor is increased.
According to the embodiment of the invention, the pressure sensor of the display panel is arranged in the acceleration sensing area of the display panel, the pressing structure is arranged corresponding to the acceleration sensing area, the pressing structure is arranged to be in contact with the acceleration sensing area, and the acceleration sensing area and the advancing direction of the object where the display panel is arranged have the first included angle of more than 0 degrees and less than 180 degrees, so that when the object where the display panel is arranged moves to generate the acceleration from the acceleration sensing area to the pressing part, the pressing part can press the acceleration sensing area of the display panel, the pressure sensor arranged in the acceleration sensing area detects the pressure of the pressing part pressing the acceleration sensing area, and the arithmetic circuit is arranged to detect the acceleration of the moving object where the display panel is arranged according to the pressure of the pressing part applied by the pressure sensor. In addition, compared with the prior art, the deep hole process in the manufacturing process of the acceleration sensor is avoided, and the problems that in the prior art, the manufacturing yield of the acceleration sensor is low and the manufacturing cost is high are solved.
The above is the core idea of the present invention, and the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.
Fig. 1 is a schematic side view of a display panel according to an embodiment of the present invention, and fig. 2 is a schematic cross-sectional view of the display panel according to the embodiment of the present invention. With reference to fig. 1 and fig. 2, the display panel includes a display area a1 and an acceleration sensing area a2, the acceleration sensing area a2 and the traveling direction (BB' direction in fig. 1) of the moving object where the display panel is located have a first included angle θ, the first included angle θ is greater than 0 ° and smaller than 180 °, and fig. 1 exemplarily sets the acceleration sensing area a2 to be perpendicular to the traveling direction of the object where the display panel is located, that is, the first included angle θ is 90 °. The display panel includes a pressing structure 10, at least one pressure sensor 20, and an arithmetic circuit (not shown), the pressure sensor 20 is located in the acceleration sensing area a2, and the pressing structure 10 is disposed corresponding to the acceleration sensing area a 2. The pressing structure 10 includes a fixing bracket 101, a pressing portion 102 and an elastic element 103, the fixing bracket 101 is fixed on a moving object where the display panel is located, the pressing portion 102 is in contact with an acceleration sensing area a2 of the display panel, one end of the elastic element 103 is connected to the fixing bracket 101, and the other end is connected to the pressing portion 102. The arithmetic circuit can detect the acceleration of the moving object on which the display panel is located, based on the pressure applied to the pressing portion 102 in the acceleration sensing area a2 in which the pressure sensor 20 is located. For example, the arithmetic circuit may be integrated in a driving chip for driving the display panel to display, or may be an independently arranged arithmetic chip.
Specifically, when the moving object on which the display panel is located moves in the direction BB ' in fig. 1, and the acceleration a11 of the moving object on which the display panel is located is also along the direction BB ', taking the moving object on which the display panel is located as an example of an automobile, that is, when the automobile is in a start-up acceleration state, due to inertia, the pressing portion 102 in contact with the acceleration sensing area a2 of the display panel presses the acceleration sensing area a2 of the display panel along the direction B ' B, and the pressing force is F, at this time, the pressing portion 102 has the acceleration a22 along the direction B ' B, and the moving object on which the display panel is located has the acceleration a11 along the direction BB '. Since the acceleration sensing area a2 is provided with the pressure sensor 20, the pressure sensor 20 detects the deformation of the pressing part 102 pressing the acceleration sensing area a2 of the display panel, and further determines the pressing force F of the pressing part 102 pressing the acceleration sensing area a2, and the computing circuit can obtain the acceleration a22 of the pressing part 102 according to the pressing force F of the pressing part 102 pressing the acceleration sensing area a2 detected by the pressure sensor 20 and the mass of the pressing part 102. When the first included angle θ between the acceleration sensing area a2 of the display panel and the moving direction of the moving object where the display panel is located is 90 °, the acceleration a11 of the moving object where the display panel is located is substantially opposite to the acceleration a22 of the pressing portion, and the acceleration a11 of the moving object where the display panel is located is obtained according to the acceleration a22 of the pressing portion 102.
Illustratively, the mass of pressing portion 102 is set to m, and pressure sensor 20 provided with acceleration sensing area a2 detects that the pressing portion 102 presses display panel acceleration sensing area a2, and the magnitude of pressure F is F0The acceleration a11 of the moving object on which the display panel is located has a magnitude a satisfying the following formula:
Figure BDA0001337817340000071
therefore, the acceleration of the moving object on which the display panel is positioned is detected by utilizing the pressure sensor 20 integrated in the display panel, and compared with the traditional MEMS acceleration sensor used in the prior art, the deep hole process in the manufacturing process of the acceleration sensor is avoided, and the problems that the manufacturing yield of the acceleration sensor is low in the prior art, and the manufacturing cost of the acceleration sensor is high due to the fact that a silicon substrate is used for manufacturing the acceleration sensor are solved.
Fig. 3 is a schematic side view of another display panel according to an embodiment of the invention. Referring to fig. 2 and 3, a first included angle θ shown in fig. 3 is exemplarily set between the acceleration sensing area a2 and the traveling direction (CC' direction in fig. 3) of the moving object where the display panel is located, and unlike the display panel shown in fig. 1 for detecting the acceleration of the moving object where the display panel is located, the pressure sensor 20 arranged in the acceleration sensing area a2 detects that the pressing part 102 vertically presses the acceleration sensing area a2 pressure F1, and the relationship with the acceleration a33 of the moving object where the display panel is located is shown in fig. 4, according to the geometric relationship shown in fig. 4, the mass of the pressing part 102 is set to m, and the pressure sensor 20 arranged in the acceleration sensing area a2 detects that the pressing part 102 vertically presses the pressure of the acceleration sensing area a2 of the display panel according to the geometric relationship shown in fig. 3Force F1 is F10The magnitude of the pressure F2 of the pressure sensor 20 provided with the acceleration sensing area A2, which detects that the pressing part 102 is parallel to the traveling direction of the moving object on which the display panel is located, is F20If the first angle between the acceleration sensing area a2 and the moving direction of the moving object (i.e. the direction CC' in fig. 3) is θ, the acceleration a33 of the moving object is equal to the magnitude a of the acceleration a330The following formula is satisfied:
Figure BDA0001337817340000081
it should be noted that, in the embodiment of the present invention, the size of the first included angle θ between the acceleration sensing area a2 and the moving direction of the moving object where the display panel is located is not limited, and the first included angle θ is greater than 0 ° and smaller than 180 °, and the first included angle θ is set to 90 °, so that the acceleration of the moving object where the display panel is located is obtained more easily.
Alternatively, the pressing portion 102 may be fixedly connected to the acceleration sensing area a2 of the display panel. Taking the structure of the display panel shown in fig. 1 as an example, when the pressing portion 102 is not fixedly connected to the acceleration sensing area a2 of the display panel, the pressing portion 102 can only press the acceleration sensing area a2 of the display panel along the B ' B direction (from right to left in fig. 1), i.e. the pressure sensor 20 integrated in the acceleration sensing area a2 of the display panel can only detect the pressure F along the B ' B direction, and further detect the acceleration a11 along the BB ' direction of the moving object where the display panel is located. When the moving object on which the display panel is located moves in the direction BB 'in fig. 1, and the acceleration a12 of the moving object on which the display panel is located is along the direction B' B, taking the moving object on which the display panel is located as an example of an automobile, that is, when the automobile is in a brake-on state, due to inertia, and the pressing portion 102 is fixedly connected to the acceleration sensing area a2 of the display panel, the pressing portion 102 can stretch the acceleration sensing area a2 of the display panel along the direction BB ', that is, the acceleration sensing area a2 of the display panel deforms along the direction BB', the pressure sensor 20 integrated in the acceleration sensing area a2 of the display panel can detect the tensile force F 'along the direction BB', at this time, the pressing portion 102 has the acceleration a23 along the direction BB ', and the moving object on which the display panel is located has the acceleration a12 along the direction B'. The pressure sensor 20 detects the deformation of the pressing portion 102 stretching the acceleration sensing area a2 of the display panel, and further determines the pulling force F 'of the pressing portion 102 stretching the acceleration sensing area a2, and the computing circuit obtains the acceleration a23 of the pressing portion 102 according to the pulling force F' of the pressing portion 102 stretching the acceleration sensing area a2 detected by the pressure sensor 20 and the mass of the pressing portion 102. When the first included angle θ between the acceleration sensing area a2 of the display panel and the moving direction of the moving object on which the display panel is located is 90 °, the acceleration a12 of the moving object on which the display panel is located is substantially opposite to the acceleration a23 of the pressing portion 102, and the acceleration a12 of the moving object on which the display panel is located is obtained according to the acceleration a23 of the pressing portion 102. By providing the pressing portion 102 in this manner and fixedly connecting the pressing portion to the acceleration sensing area a2 of the display panel, it is possible to detect the acceleration a11 of the vehicle in the BB 'direction and also detect the acceleration a12 of the vehicle in the B' B direction.
Optionally, the pressing portion 102 may be fixedly connected to the acceleration sensing area a2 of the display panel through an adhesive. For example, the adhesive for fixedly connecting the pressing portion 102 and the acceleration sensing area a2 of the display panel is preferably a rigid adhesive, such as a ring-shaped resin. If the adhesive with lower hardness is used, when the pressing portion 102 presses or stretches the acceleration sensing area a2 of the display panel, the adhesive with lower hardness has a buffering effect on the pressure and the pulling force of the pressing portion 102 acting on the acceleration sensing area a2 of the display panel, so that a larger error exists between the pressure detected by the pressure sensor 20 integrated in the acceleration sensing area a2 of the display panel and the actual pressure of the pressing portion 102 pressing the acceleration sensing area a2 caused by the acceleration, that is, a larger error exists between the acceleration of the moving object where the display panel is finally detected and the actual acceleration to be detected. The rigid glue with higher hardness can greatly reduce the error of the acceleration detection of the moving object where the display panel is located. It should be noted that, other ways may also be used to fixedly connect the pressing part 102 and the acceleration sensing area a2 of the display panel, which is not limited in the embodiment of the present invention.
Alternatively, the stretching direction of the elastic element 103 may be parallel to the traveling direction of the moving object on which the display panel is located. For example, referring to fig. 1, when the moving direction of the moving object on which the display panel is located is parallel to the BB ' direction, the elastic element 103 may extend along the B ' B direction or compress along the BB ' direction, so as to detect the acceleration of the moving object on which the display panel is located along the BB ' direction and the B ' B direction.
Optionally, as shown in fig. 2, the display panel may further include a plurality of thin film transistors 30, and in a direction away from the substrate 40, each thin film transistor 30 may include an active layer 301, a gate electrode 302, and a source electrode 303 and a drain electrode 304 that are fabricated in the same layer, and the material of the pressure sensor 20 integrated in the acceleration sensing area a2 of the display panel may be a semiconductor material such as amorphous silicon or polysilicon, or may be any metal material, so that the pressure sensor 20 and the active layer 301 of the thin film transistor 30 may be fabricated in the same layer, or the pressure sensor 20 and any metal layer in the thin film transistor 30 may be fabricated in the same layer, as shown in fig. 2, the pressure sensor 20 and the gate electrode 302 of the thin film transistor 30 are exemplarily disposed in the same layer, or may be fabricated in the same layer as the source. Therefore, the pressure sensor 20 is manufactured by utilizing the active layer 301 or any metal layer in the thin film transistor 30, the pressure sensor 20 is integrated in the display panel, and the pressure sensor 20 can be used for detecting the acceleration of a moving object where the display panel is located.
Alternatively, as shown in fig. 1 or fig. 3, the display panel may be a flexible display panel. Exemplarily, the moving object at which the display panel is located can be an automobile, and along with the increase of the demand of a user for the space amount in the automobile, the display panel is a flexible display panel through setting, namely the display panel is bendable, so that the space for setting the display panel in the automobile is greatly saved, and the space utilization rate in the automobile is improved.
For example, as shown in fig. 5, the display area a1 and the acceleration sensing area a2 of the display panel may be located in the same plane, and the pressing structure 10 is also disposed corresponding to the acceleration sensing area a1 of the display panel to detect the acceleration of the moving object in which the display panel is located, as also shown in fig. 1, a second included angle α is formed between the display area a1 and the acceleration sensing area a2 of the display panel, and the second included angle α may be greater than 0 ° and less than 180 °, and a second included angle greater than 0 ° and less than 180 ° may be formed between the display area a1 and the acceleration sensing area a2 of the display panel by using the flexible display panel, and when the moving object in which the display panel is located is an object such as an automobile that has a requirement for a space amount, the second included angle α greater than 0 ° and less than 180 ° may be disposed between the display area a1 of the display panel and the acceleration sensing area a2 of the display panel, so that the utilization rate of the space of the object such as an automobile is increased based on the detection.
Optionally, fig. 6 is a schematic structural diagram of a pressure sensor according to an embodiment of the present invention. With reference to fig. 1, 2, and 6, each pressure sensor 20 may include a first sense resistor R1, a second sense resistor R2, a third sense resistor R3, and a fourth sense resistor R4. The first end a1 of the first sensing resistor R1, the first end a4 of the fourth sensing resistor R4 and the first power input end Vcc1Electrically connected to the second end b1 of the first sensing resistor R1, the first end a2 of the second sensing resistor R2 and the first sensing signal measuring end V+Electrically connected to the second end b4 of the fourth sensing resistor R4, the first end a3 of the third sensing resistor R3 and the second sensing signal measuring end V-Electrically connected to the second end b2 of the second sensing resistor R2 and the second end b3 of the third sensing resistor R3 and the second power input terminal Vcc2And (6) electrically connecting. Illustratively, the first power supply input terminal Vcc1The input voltage may be, for example, a positive voltage, the second supply input terminal Vcc2The input voltage may be, for example, a negative voltage or a zero voltage, and for example, the second power supply input terminal V may be connected tocc2And (4) grounding.
Specifically, the pressure sensor 20 shown in fig. 6 is a wheatstone bridge structure, and the first sensing resistor R1, the second sensing resistor R2, the third sensing resistor R3 and the fourth sensing resistor R4 are connected to form a quadrilateralABCD, called the four arms of the bridge. A diagonal BD of the quadrilateral ABCD is connected with a galvanometer G, and two poles of the galvanometer G are a first induction signal measuring end V+And a second induction signal measuring terminal V-The diagonal lines AC of the quadrilateral ABCD are respectively connected with the first power supply input end Vcc1And a second power supply input terminal Vcc2. When the first power supply input terminal Vcc1And a second power supply input terminal Vcc2When the voltage on the bridge circuit has a certain difference value, all branches in the bridge circuit have current to pass through. The resistance values of the first sensing resistor R1, the second sensing resistor R2, the third sensing resistor R3 and the fourth sensing resistor R4 meet the requirement
Figure BDA0001337817340000111
When the potentials between the two points BD are equal, the current flowing through the galvanometer G is zero, the pointer of the galvanometer G indicates zero scale, the bridge is in a balanced state, and the balance is obtained
Figure BDA0001337817340000112
The bridge balance condition. When the resistance values of the first sensing resistor R1, the second sensing resistor R2, the third sensing resistor R3 and the fourth sensing resistor R4 do not satisfy the bridge balance condition, the potentials between the two points BD are not equal, the current flowing through the galvanometer G is not 0, the pointer of the galvanometer G deflects, and a corresponding signal value is output.
When the pressing portion 102 presses the acceleration sensing area a2 of the display panel under the effect of the acceleration of the moving object where the display panel is located, the acceleration sensing area a2 of the display panel deforms, the first sensing resistor R1, the second sensing resistor R2, the third sensing resistor R3 and the fourth sensing resistor R4 all deform to change the resistance of the first sensing resistor R1, the second sensing resistor R2, the third sensing resistor R3 and the fourth sensing resistor R4, which causes the bridge to lose balance, the galvanometer G outputs a corresponding signal value, the pressure applied to the pressure sensor 20 is detected according to the signal value output by the galvanometer G, and the arithmetic circuit further obtains the acceleration of the moving object where the display panel is located according to the pressure detected by the pressure sensor 20 and the quality of the pressing portion 102.
Optionally, fig. 7 is a schematic structural diagram of another pressure sensor provided in the embodiment of the present invention. In addition to the wheatstone bridge configuration of the pressure sensor shown in fig. 6, the display panel may include a first extending direction 100 and a second extending direction 200, and the first extending direction 100 and the second extending direction 200 are arranged to cross each other. A component of an extension length of the first sense resistor R1 from the first end a1 to the second end b1 in the first extending direction 100 may be greater than a component in the second extending direction 200, a component of an extension length of the second sense resistor R2 from the first end a2 to the second end b2 in the second extending direction 200 may be greater than a component in the first extending direction 100, a component of an extension length of the third sense resistor R3 from the first end a3 to the second end b3 in the first extending direction 100 may be greater than a component in the second extending direction 200, and a component of an extension length of the fourth sense resistor R4 from the first end a4 to the second end b4 in the second extending direction 200 may be greater than a component in the first extending direction 100.
Specifically, since the pressure sensor 20 shown in fig. 6 generally requires that the deformations sensed by the first sensing resistor R1, the second sensing resistor R2, the third sensing resistor R3 and the fourth sensing resistor R4 are different, for example, the first sensing resistor R1 and the third sensing resistor R3 sense compression deformation, and the second sensing resistor R2 and the fourth sensing resistor R4 sense extension deformation, the first sensing resistor R1 and the second sensing resistor R2, and the third sensing resistor R3 and the fourth sensing resistor R4 are spatially separated, when the local temperature changes, the first sensing resistor R1, the second sensing resistor R2, the third sensing resistor R3 and the fourth sensing resistor R8 are in different temperature environments, and the temperature affects the pressure sensor 20 with different accuracy, and further the accuracy of detecting the acceleration of the moving object where the display panel is located is reduced.
With reference to fig. 1, 2 and 7, the pressure sensor 20 shown in fig. 7 is configured to provide a first voltage input Vcc1And a second power supply input terminal Vcc2After electric signals are applied to the first sensing resistor R1, the second sensing resistor R2, the third sensing resistor R3 and the fourth sensing resistor R4, when no pressure is applied, the pressure sensing bridge meets the requirement of a bridge balance barMember in equilibrium with a first inductive-signal measuring terminal V+And a first induction signal measuring terminal V-The signal value of the output in between is zero; when the pressing portion 102 presses the acceleration sensing area a2 of the display panel under the acceleration of the moving object in which the display panel is located, the acceleration sensing area a2 of the display panel deforms, the first sensing resistor Rl and the third sensing resistor R3 sense the strain in the first extending direction 100, the corresponding resistance value of the first sensing resistor changes correspondingly, the second sensing resistor R2 and the fourth sensing resistor R4 sense the strain in the second extending direction 200, the corresponding resistance value of the second sensing resistor R2 changes correspondingly, the strain in the first extending direction 100 is different from that in the second extending direction 200, the resistance values of Rl and R2 and the resistance values of R3 and R4 are different, the pressure sensing bridge does not satisfy the balance condition, the first sensing signal measuring end V2 loses balance, and the first sensing signal measuring end V does not sense the balance condition+And a first induction signal measuring terminal V-The output signal value is not zero, the pressure applied to the pressure sensor 20 can be obtained according to the signal value, and the computing circuit further obtains the acceleration of the moving object where the display panel is located according to the pressure detected by the pressure sensor 20 and the quality of the pressing part 102.
With respect to the structure of the pressure sensor 20 shown in fig. 6, the pressure sensor 20 shown in fig. 7 senses the strain in the first extending direction 100 by arranging the first sensing resistor R1 and the third sensing resistor R3, and the second sensing resistor R2 and the fourth sensing resistor R4 sense the strain in the second extending direction 200, so that the first sensing resistor R1, the second sensing resistor R2, and the third sensing resistor R3 and the fourth sensing resistor R4 can be distributed in the same space or in a relatively small area. Therefore, the first sensing resistor R1, the second sensing resistor R2, the third sensing resistor R3 and the fourth sensing resistor R4 have synchronous temperature change, the influence of temperature difference is eliminated, the pressure sensing precision is improved, and the detection precision of the acceleration of a moving object where the display panel is located is further improved.
Alternatively, the pressure sensor may be in the form of a block made of a semiconductor material and having a shape of a polygon including at least four sides. The pressure sensor comprises a first connecting end, a second connecting end, a third connecting end and a fourth connecting end, wherein the first connecting end is electrically connected with the first power input end, the second connecting end is electrically connected with the second power input end, the third connecting end is electrically connected with the first induction signal measuring end, and the fourth connecting end is electrically connected with the second induction signal measuring end. The first connecting end, the second connecting end, the third connecting end and the fourth connecting end are respectively arranged on four polygonal edges, the edge where the first connecting end is located is not connected with the edge where the second connecting end is located, and the edge where the third connecting end is located is not connected with the edge where the fourth connecting end is located. For example, fig. 8 illustrates the pressure sensor as a quadrilateral, but the shape of the pressure sensor is not limited in the embodiment of the present invention.
Illustratively, in conjunction with fig. 1, 2 and 8, the pressure sensor 20 may have a quadrilateral shape, the first connection end 201, the second connection end 202, the third connection end 203 and the fourth connection end 204 may be a first side 221, a second side 222, a third side 223 and a fourth side 224 of the pressure sensor, respectively, the first side 221 and the second side 222 of the pressure sensor 20 are disposed opposite to each other, the third side 223 and the fourth side 224 are disposed opposite to each other, and the first connection end 201 is opposite to the first power input end Vcc1Electrically connected to the second terminal 202 and the second power input terminal Vcc2Electrically connected to the third connecting terminal 203 and the first sensing signal measuring terminal V+Electrically connected to the fourth connecting terminal 204 and the second sensing signal measuring terminal V-And (6) electrically connecting. In particular, the first power supply input terminal Vcc1And a second power supply input terminal Vcc2Bias voltage can be applied to the pressure sensor 20 through the first connection end 201 and the second connection end 202 of the pressure sensor 20, when the pressing portion 102 presses the acceleration sensing area a2 of the display panel under the action of the acceleration of the moving object in which the display panel is located, the acceleration sensing area a2 of the display panel deforms, the resistance value of the strain resistor disc 211 of the pressure sensor 20 changes, and the corresponding first sensing signal measurement end V changes+And a second induction signal measuring terminal V-When the output strain voltage changes accordingly, the pressure of the pressing portion 102 applied to the pressure sensor 20 can be detected by detecting the change in the voltage across the strain resistance disc 211, and the arithmetic circuit obtains and displays the pressure detected by the pressure sensor 20 and the quality of the pressing portion 102Acceleration of the moving object on which the panel is located.
Optionally, fig. 9 is a schematic structural diagram of another pressure sensor provided in the embodiment of the present invention. Unlike fig. 8, fig. 9 independently sets the first connection terminal 201, the second connection terminal 202, the third connection terminal 203, and the fourth connection terminal 204 as protrusions on four sides of the quadrangular pressure sensor 20, respectively. The first terminal 201 and the first power input terminal V are also arrangedcc1Electrically connected to the second terminal 202 and the second power input terminal Vcc2Electrically connected to the third connecting terminal 203 and the first sensing signal measuring terminal V+Electrically connected to the fourth connecting terminal 204 and the second sensing signal measuring terminal V-And (6) electrically connecting. The principle of pressure detection is the same as that of the pressure sensor 20 shown in fig. 8, and the description thereof is omitted. For example, the first connection end 201, the second connection end 202, the third connection end 203, and the fourth connection end 204 may be made of the same material as the strain resistor 211 of the pressure sensor 20, so that the schottky barrier between the first connection end 201, the second connection end 202, the third connection end 203, and the fourth connection end 204 and the strain resistor 211 of the pressure sensor 20 can be effectively reduced, and the detection accuracy of the pressure sensor 20 is further improved.
Optionally, fig. 10 is a schematic structural diagram of another pressure sensor provided in the embodiment of the present invention. Fig. 10 is based on the structure of the pressure sensor 20 shown in fig. 8, and a hollow area 212 may be provided on the pressure sensor 20. Since the strain resistor disc 211 in the pressure sensor 20 is a whole-chip resistor, the through area of the strain resistor disc 211 is reduced by the arrangement of the hollow area 212, that is, the resistance of the pressure sensor 20 is increased. Since the first power supply input terminal Vcc1A second power input terminal Vcc2First induction signal measuring terminal V+And a second induction signal measuring terminal V-The wires between the pressure sensor 20 have certain wire resistance, and the voltage division ratio of the pressure sensor 20 relative to the wires can be increased by arranging the hollow area 212 on the pressure sensor 20 to increase the resistance of the pressure sensor 20, that is, the voltage division ratio is at the first power input end Vcc1And a second power supply input terminal Vcc2Input ofUnder the condition that the bias voltages are the same, the strain voltage of the pressure sensor 20 can be increased, the detection accuracy of the pressure sensor 20 is increased, and the detection accuracy of the acceleration of the moving object where the display panel is located is further improved.
It should be noted that the drawings of the embodiments of the present invention only show the size of each element and the thickness of each film layer by way of example, and do not represent the actual size of each element and each film layer in the display panel.
The embodiment of the invention arranges the pressure sensor 20 of the display panel in the acceleration sensing area a2 of the display panel, arranges the pressing structure 10 corresponding to the acceleration sensing area a2, arranges the pressing structure 10 to contact with the acceleration sensing area a2, meanwhile, the acceleration sensing area A2 is arranged to form a first included angle larger than 0 degree and smaller than 180 degrees with the traveling direction of the object on which the display panel is arranged, so that when the object on which the display panel is arranged moves to generate the acceleration in the direction from the acceleration sensing area A2 to the pressing part 102, pressing part 102 can press acceleration sensing area a2 of the display panel, pressure sensor 20 provided with acceleration sensing area a2 detects the pressure of pressing part 102 pressing acceleration sensing area a2, and arithmetic circuit is provided to detect the acceleration of the moving object on which the display panel is located according to the pressure of pressing part 102 received by pressure sensor 20. In addition, compared with the prior art, the deep hole process in the manufacturing process of the acceleration sensor is avoided, and the problems that in the prior art, the manufacturing yield of the acceleration sensor is low and the manufacturing cost is high are solved.
The embodiment of the invention also provides a display device, and fig. 11 is a schematic structural diagram of the display device provided by the embodiment of the invention. As shown in fig. 11, the display device 6 includes the display panel 7 in the above embodiments, so that the display device 6 provided in the embodiment of the present invention also has the beneficial effects described in the above embodiments, and details are not repeated herein. For example, the display device 6 may be a vehicle-mounted display device, and the display panel 7 in the above embodiment may implement the detection of the acceleration of the vehicle.
Fig. 12 is a schematic flow chart of an acceleration detection method provided in an embodiment of the present invention, and the acceleration detection method may be applied to a scene in which an acceleration of a moving object needs to be detected, and may be executed by the display panel provided in the embodiment of the present invention. The method comprises the following steps:
and S110, acquiring the pressure applied to the pressure sensor.
With reference to fig. 1 and 2, when the moving object on which the display panel is located has an acceleration in the direction BB ', the pressing portion 102 presses the acceleration sensing area a2 of the display panel in the direction B' B, and the pressure sensor 20 disposed in the acceleration sensing area a2 can detect the pressure of the pressing portion 102 pressing the acceleration sensing area a 2.
And S120, acquiring the acceleration of the moving object where the display panel is located according to the pressure received by the pressure sensor and the quality of the pressing part.
With reference to fig. 1 and fig. 2, an arithmetic circuit disposed in the display panel, for example, the arithmetic circuit may integrate a driving chip for driving the display panel to display, acquire the pressure of the pressing portion 102 pressing the acceleration sensing area a2 of the display panel detected by the pressure sensor 20, and obtain the acceleration of the moving object where the display panel is located according to the acquired pressure and the mass of the pressing portion 102.
According to the embodiment of the invention, the pressure applied to the pressure sensor is obtained through the pressure sensor integrated in the acceleration sensing area of the display panel, and the acceleration of the moving object where the display panel is located is obtained according to the pressure applied to the pressure sensor and the quality of the pressing part, so that the acceleration of the moving object where the display panel is located is detected, and compared with the prior art, a deep hole process in the manufacturing process of the acceleration sensor is avoided, and the problems of low manufacturing yield and high manufacturing cost of the acceleration sensor in the prior art are solved.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (17)

1. A display panel, comprising:
a display area and an acceleration sensing area; the acceleration sensing area and the advancing direction of a moving object where the display panel is located form a first included angle, and the first included angle is larger than 0 degree and smaller than 180 degrees;
the pressing structure and the at least one pressure sensor are positioned in the acceleration sensing area; the pressing structure is arranged corresponding to the acceleration sensing area;
the pressing structure comprises a fixed support, a pressing part and an elastic element, the fixed support is fixed on a moving object where the display panel is located, the pressing part is in contact with the acceleration sensing area of the display panel, one end of the elastic element is connected with the fixed support, and the other end of the elastic element is connected with the pressing part;
and the operation circuit is used for detecting the acceleration of a moving object where the display panel is located according to the pressure of the pressure sensor on the pressing part.
2. The display panel according to claim 1, wherein the first included angle is 90 °.
3. The display panel according to claim 1, wherein the display area and the acceleration sensing area of the display panel are located in the same plane.
4. The display panel according to claim 1, wherein the display area and the acceleration sensing area of the display panel have a second included angle, and the second included angle is greater than 0 ° and smaller than 180 °.
5. The display panel according to claim 1, wherein the pressing portion is fixedly connected to the acceleration sensing area of the display panel.
6. The display panel according to claim 5, wherein the pressing portion is fixedly connected to the acceleration sensing area of the display panel through an adhesive.
7. The display panel of claim 6, wherein the adhesive is a rigid adhesive.
8. The display panel according to claim 1, wherein a stretching direction of the elastic element is parallel to a traveling direction of a moving object in which the display panel is located.
9. The display panel according to claim 1, wherein each of the pressure sensors comprises:
the device comprises a first induction resistor, a second induction resistor, a third induction resistor and a fourth induction resistor;
the first end of first sense resistor and the first end of fourth sense resistor is connected with first power input end electricity, the second end of first sense resistor and the first end of second sense resistor is connected with first sensing signal measurement end electricity, the second end of fourth sense resistor and the first end of third sense resistor is connected with second sensing signal measurement end electricity, the second end of second sense resistor and the second end of third sense resistor is connected with second power input end electricity.
10. The display panel according to claim 9,
the display panel comprises a first extending direction and a second extending direction, and the first extending direction and the second extending direction are arranged in a crossed mode;
the component of the extension length of the first sensing resistor from the first end to the second end in the first extension direction is larger than the component of the extension length of the second sensing resistor from the first end to the second end in the second extension direction, the component of the extension length of the third sensing resistor from the first end to the second end in the first extension direction is larger than the component of the extension length of the third sensing resistor in the second extension direction, and the component of the extension length of the fourth sensing resistor from the first end to the second end in the second extension direction is larger than the component of the extension length of the fourth sensing resistor in the first extension direction.
11. The display panel according to claim 1, wherein the pressure sensor is a block-shaped, made of a semiconductor material, having a shape of a polygon including at least four sides;
the pressure sensor comprises a first connecting end, a second connecting end, a third connecting end and a fourth connecting end; the first connecting end is electrically connected with the first power supply input end; the second connecting end is electrically connected with a second power supply input end; the third connecting end is electrically connected with the first induction signal measuring end; the fourth connecting end is electrically connected with the second induction signal measuring end; the first connecting end, the second connecting end, the third connecting end and the fourth connecting end are respectively arranged on four sides of the polygon, the side where the first connecting end is located is not connected with the side where the second connecting end is located, and the side where the third connecting end is located is not connected with the side where the fourth connecting end is located.
12. The display panel according to claim 11, wherein a hollow area is disposed on the pressure sensor.
13. The display panel according to claim 1, further comprising:
a plurality of thin film transistors, each of the thin film transistors including an active layer;
the pressure sensor and the active layer are manufactured in the same layer; or
The pressure sensor and any metal layer in the display panel are manufactured in the same layer.
14. The display panel according to claim 1, wherein the display panel is a flexible display panel.
15. A display device characterized by comprising the display panel according to any one of claims 1 to 14.
16. The display device according to claim 15, wherein the display device is an in-vehicle display device.
17. An acceleration detection method based on the display panel of any one of claims 1 to 14, comprising:
acquiring the pressure applied to the pressure sensor;
and obtaining the acceleration of the moving object where the display panel is located according to the pressure applied to the pressure sensor and the mass of the pressing part.
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