A foolproof circuit, connector and display device

Abstract

The embodiments of the present application provide a fool-proof circuit, a connector, and a display device, which are connected to the input port of the connector through a comparison module, accept multiple input signals of the connector, and output a control signal according to the multiple input signals, so as to generate a voltage-dividing signal for controlling the conduction or shutoff of a power signal through the conduction or shutoff of a first switch module, so that the output of the power signal is promptly shut off when the connector is incorrectly plugged in, thereby avoiding the problem of the panel being unable to be used normally due to the burning of electronic components caused by the incorrect insertion of the connector.

Description

Technical Field

[0001] The embodiments of the present application belong to the field of display technology, and in particular, relate to a fool-proof circuit, a connector, and a display device. Background Art

[0002] As a basic component, the connector is used to transmit current between devices, components, and systems, so that the electronic system can work properly. Usually, the connector includes a socket and a plug, which can be plugged into each other as a whole, wherein a plurality of docking holes are provided on the socket, and a conductive electrode is provided in each docking hole, and each conductive electrode can receive and transmit current of different voltages, so that different currents can be transmitted to different electronic components through the connector, so that each electronic component can work properly.

[0003] For example, in a display, a flexible flat cable with a large number of pins is usually used as the wire of the connector, which is used to connect the display panel and the screen driver board so that the screen driver board drives the display panel to display normally.

[0004] However, during the production and use process, due to the small pin spacing of the connector, the electronic components often burn out due to the wrong insertion of the connector, resulting in the panel being unable to be used normally. Summary of the invention

[0005] The embodiments of the present application provide a fool-proof circuit, a connector, and a display device, which are intended to solve the problem that the panel cannot be used normally due to the burning of electronic components caused by the incorrect insertion of the connector due to the small pin spacing of the connector.

[0006] The present application provides a foolproof circuit, comprising:

[0007] A comparison module, connected to the input port of the connector, configured to receive a plurality of input signals of the connector and output a control signal according to the plurality of input signals;

[0008] A first switch module, connected to the comparison module, and configured to be turned on or off according to the control signal;

[0009] A voltage dividing module, connected to the power line and the first switch module respectively, for receiving a power signal on the power line and outputting a corresponding voltage dividing signal according to the on or off state of the first switch module;

[0010] The second switch module is connected to the power line and the voltage divider module respectively, and is used to receive the power signal and the voltage divider signal, and control the on and off of the power signal according to the voltage divider signal.

[0011] Optionally, the comparison module includes an AND gate, and the AND gate includes at least one input terminal;

[0012] The input end of the AND gate serves as the input end of the comparison module, and the output end of the AND gate serves as the output end of the comparison module.

[0013] Optionally, the comparison module includes:

[0014] a first input terminal connected to a first pin of the connector, the first pin being located at a first side of the connector; and

[0015] A second input terminal is connected to a second pin of the connector, and the second pin is located at a second side of the connector.

[0016] Optionally, the first switch module includes a first electronic switch tube, the control end of the first electronic switch tube is connected to the output end of the comparison module as the control end of the first switch module, the current output end of the first electronic switch tube is grounded as the output end of the first switch module, and the current input end of the first electronic switch tube is connected to the current output end of the voltage divider module as the input end of the first switch module.

[0017] Optionally, the voltage division module includes:

[0018] a first resistance unit, wherein a first end of the first resistance unit is connected to an input end of the first switch module as a current output end of the voltage divider module; and

[0019] A second resistor unit, wherein the first end of the second resistor unit is connected to the second end of the first resistor unit, serving as the voltage division signal output end of the voltage division module connected to the control end of the second switch module, and the second end of the second resistor unit is connected to the power line.

[0020] Optionally, the second switch module includes a second electronic switch tube, the control end of the second electronic switch tube serves as the control end of the second switch module and is connected to the voltage divider signal output end of the voltage divider module, the current input end of the second electronic switch tube serves as the input end of the second switch module and is connected to the power line, and the current output end of the second electronic switch tube serves as the output end of the second switch module.

[0021] Optionally, the second electronic switch tube is any one of a P-type metal oxide semiconductor field effect transistor, a polycrystalline silicon thin film transistor, an amorphous silicon thin film transistor, a zinc oxide-based thin film transistor or an organic thin film transistor.

[0022] An embodiment of the present application further provides a connector, which includes an anti-foolproof circuit as described in any one of the above embodiments, and is used to connect a display panel and a screen driving board.

[0023] Optionally, the wire material of the connector is a flexible flat cable.

[0024] The present application also provides a display device, including:

[0025] Display panel;

[0026] Screen driver board; and

[0027] The connector described in the above embodiments.

[0028] The embodiments of the present application provide a fool-proof circuit, a connector, and a display device, which are connected to the input port of the connector through a comparison module, accept multiple input signals of the connector, and output a control signal according to the multiple input signals, so as to generate a voltage-dividing signal for controlling the conduction or shutoff of a power signal through the conduction or shutoff of a first switch module, so that the output of the power signal is promptly shut off when the connector is incorrectly plugged in, thereby avoiding the problem of the panel being unable to be used normally due to the burning of electronic components caused by the incorrect insertion of the connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 A schematic diagram of the structure of a fool-proof circuit provided in one embodiment of the present application;

[0031] Figure 2 A schematic diagram of the structure of a fool-proof circuit provided in another embodiment of the present application;

[0032] Figure 3 It is a schematic diagram of the structure of a display device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application.

[0034] The term "comprising" and any variations thereof in the specification and claims of the present application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method or system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. In addition, the terms "first", "second" and "third" etc. are used to distinguish different objects, rather than to describe a specific order.

[0035] Figure 1 A schematic diagram of the structure of a fool-proof circuit provided for one embodiment of the present application.

[0036] like Figure 1 As shown, the foolproof circuit in this embodiment includes:

[0037] The comparison module 10 is connected to the input port of the connector, and is used to receive a plurality of input signals of the connector, and output a control signal according to the plurality of input signals;

[0038] A first switch module 20, connected to the comparison module 10, and configured to be turned on or off according to a control signal;

[0039] The voltage dividing module 30 is connected to the power line VDD and the first switch module 20 respectively, and is used to receive the power signal on the power line VDD and output a corresponding voltage dividing signal according to the on or off of the first switch module 20;

[0040] The second switch module 40 is connected to the power line VDD and the voltage dividing module 30 respectively, and is used for receiving the power signal and the voltage dividing signal, and controlling the on and off of the power signal according to the voltage dividing signal.

[0041] In one embodiment, the comparison module 10 receives signals from multiple pins in the connector. When the pins in the connector are normally plugged in, the voltage signals received by the comparison module 10 are all high level. At this time, the control signal output by the comparison module 10 is also high level. At this time, the first switch module 20 is turned on, the voltage divider module 30 receives the power signal provided by the power line VDD, and outputs the corresponding voltage divider signal. The second switch module 40 is turned on after receiving the voltage divider signal, and the power signal can be directly turned on in the connector.

[0042] In one embodiment, when the pin in the connector is abnormally plugged in, a low level appears in the voltage signal received by the comparison module 10. At this time, the control signal output by the comparison module is also a low level, the first switch module 20 is turned off, the voltage divider module 30 receives the power signal provided by the power line VDD, and outputs a corresponding voltage divider signal, the second switch module 40 is turned off after receiving the voltage divider signal, and the power signal stops being output, thereby avoiding failure of the back-end circuit due to signal abnormality.

[0043] Figure 2 This is a schematic diagram of a foolproof circuit provided by another embodiment of the present application. Figure 2 , in one embodiment, the comparison module 10 includes an AND gate D1, and the AND gate D1 includes at least one input terminal;

[0044] The input end of the AND gate D1 serves as the input end of the comparison module 10 , and the output end of the AND gate D1 serves as the output end of the comparison module 10 .

[0045] The pin signal in the connector is processed by AND gate D1. If the levels of the pin signals in the connector are inconsistent, the AND gate D1 outputs a low-level signal. If the levels of the pin signals in the connector are consistent, the AND gate D1 outputs a high-level signal. When the pin signals in the connector are inconsistent, the AND gate D1 outputs a low-level signal and cuts off the output of the power signal. This can effectively avoid the abnormal power signal caused by the crooked insertion of the connector, which may lead to the burning of the back-end circuit.

[0046] See also Figure 2 In one embodiment, the comparison module 10 comprises:

[0047] A first input terminal connected to a first pin of the connector, the first pin being located at a first side of the connector; and

[0048] The second input end is connected to a second pin of the connector, and the second pin is located at a second side of the connector.

[0049] See also Figure 2 In one embodiment, the first switch module 20 includes a first electronic switch tube M1, the control end of the first electronic switch tube M1 is connected to the output end of the comparison module 10 as the control end of the first switch module 20, the current output end of the first electronic switch tube M1 is grounded as the output end of the first switch module 20, and the current input end of the first electronic switch tube M1 is connected to the current output end of the voltage divider module 30 as the input end of the first switch module 20.

[0050] In one embodiment, the first electronic switch tube M1 is an N-type MOS tube, the drain of the N-type MOS tube serves as the current input end of the first electronic switch tube M1, the source of the N-type MOS tube serves as the current output end of the first electronic switch tube M1, and the gate of the N-type MOS tube serves as the current output end of the first electronic switch tube M1.

[0051] When the connector is plugged in normally, the signals of the pins in the connector are consistent. At this time, the AND gate D1 outputs a high level signal, the first electronic switch tube M1 is turned on, and the voltage division signal output by the voltage division module 30 turns on the second switch module 40, and the power line VDD is powered normally.

[0052] When the connector is plugged in abnormally, the signals of the pins in the connector are inconsistent. At this time, the AND gate D1 outputs a low-level signal, the first electronic switch tube M1 is disconnected, and the voltage of the voltage-dividing signal output by the voltage-dividing module 30 rises. At this time, the switch module 40 is disconnected and the power line VDD is disconnected.

[0053] See also Figure 2 In one embodiment, the voltage dividing module 30 includes:

[0054] A first resistance unit, wherein a first end of the first resistance unit is connected to an input end of the first switch module 20 as a current output end of the voltage divider module 30; and

[0055] The second resistor unit, the first end of the second resistor unit is connected to the second end of the first resistor unit, the voltage division signal output end of the voltage division module 30 is connected to the control end of the second switch module 40, and the second end of the second resistor unit is connected to the power line VDD.

[0056] In one embodiment, the first resistance unit includes a first resistor R1 , a first end of the first resistor R1 serves as a first end of the first resistance unit, and a second end of the first resistor R1 serves as a second end of the first resistance unit.

[0057] In one embodiment, the first resistance unit can be a plurality of resistors connected in series or in parallel, wherein the first end of the plurality of resistors connected in series or in parallel serves as the first end of the first resistance unit, and the second end of the plurality of resistors connected in series or in parallel serves as the second end of the first resistance unit.

[0058] In one embodiment, the second resistance unit includes a second resistor R2, a first end of the second resistor R2 serves as a first end of the second resistance unit, and a second end of the second resistor R2 serves as a second end of the second resistance unit.

[0059] When the first switch module 20 is turned on, the second resistor R2 is grounded, and the voltage division signal output by the voltage division module 30 is a low-level signal. At this time, the low-level signal can turn on the second switch module 40. When the first switch module 20 is turned off, the voltage between the second resistor R2 and the first resistor R1 is a high level, and the voltage division signal output by the voltage division module 30 is a high-level signal. At this time, the high-level signal can turn off the second switch module 40 and disconnect the power line VDD.

[0060] See also Figure 2 In one embodiment, the second switch module 40 includes a second electronic switch tube M2, the control end of the second electronic switch tube M2 is connected to the voltage division signal output end of the voltage division module 30 as the control end of the second switch module 40, the current input end of the second electronic switch tube M2 is connected to the power line as the input end of the second switch module 40, and the current output end of the second electronic switch tube M2 is used as the output end of the second switch module 40.

[0061] In one embodiment, the second electronic switch tube M2 is any one of a P-type metal oxide semiconductor field effect transistor, a polysilicon thin film transistor, an amorphous silicon thin film transistor, a zinc oxide-based thin film transistor or an organic thin film transistor.

[0062] In one embodiment, the second electronic switch tube M2 is a P-type MOS tube, the drain of the P-type MOS tube serves as the current output end of the second electronic switch tube M2, the source of the P-type MOS tube serves as the current input end of the second electronic switch tube M2, and the gate of the P-type MOS tube serves as the control end of the second electronic switch tube M2.

[0063] When the control end of the second electronic switch tube M2 is a low level signal, the second electronic switch tube M2 is turned on, and when the control end of the second electronic switch tube M2 is a high level signal, the second electronic switch tube M2 is turned off.

[0064] An embodiment of the present application further provides a connector, which includes an anti-foolproof circuit as in any of the above embodiments, and is used to connect a display panel and a screen driving board.

[0065] In one embodiment, the wire material of the connector is a flexible flat cable (FCC).

[0066] In one embodiment, see Figure 2 The input end of the comparison module 10 is used to receive the driving voltage signal output by the screen driving board (Tcon Board). In this embodiment, the input end of the comparison module 10 takes a pin from the first side and the second side of the connector as the input end of the anti-fool circuit. This embodiment takes the first pin Enable1 and the second pin Enable2 in the connector wire as an example.

[0067] In one embodiment, the voltage of the driving voltage signal output by the screen driver board is 3.3V, and the X Board connected to the back end of the foolproof circuit is low by default. When the connector is connected normally, the pin in the X Board is pulled up to a high level. In this embodiment, when the FFC cable is connected normally, the voltage signals of the first pin Enable1 and the second pin Enable2 are both high, and the logic judgment of the AND gate D1 is high, the first electronic switch tube M1 is turned on, and the voltage at the control end of the second electronic switch tube M2 is reduced due to the voltage division of the resistor R1 and the resistor R2, so that the second electronic switch tube M2 is turned on, and the power signal provided by the power line can be input to the X Board;

[0068] In one embodiment, when the FFC is not connected properly, when the voltage signal of any one of the first pin Enable1 and the second pin Enable2 in the wire of the connector is at a low level, the logic judgment output of the AND gate D1 is at a low level, and the first electronic switch tube M1 is in an off state, and the control end of the second electronic switch tube M2 is connected to the power line because the pull-up resistor R1 is connected to the power line, so that the second electronic switch tube M2 is turned off, resulting in the power signal in the power line VDD failing to be input to the X Board, thereby protecting the electronic components on the X Board when the FFC is not connected properly;

[0069] In this embodiment, electrical anti-mismatching is used, so there is no need to make structural changes to the connector. For example, making mechanical anti-mismatching components will increase the size of the connector, and conventional connectors on the market can continue to be used, thereby improving the versatility of the connector.

[0070] Figure 3 It is a schematic diagram of the structure of a display device provided by an embodiment of the present application.

[0071] like Figure 3 As shown, the display device 60 in this embodiment includes:

[0072] Display panel 63;

[0073] A screen driving board 62; and

[0074] The connector 61 in the above embodiment.

[0075] In one embodiment, the display device 60 can be any type of display device provided with the above-mentioned connector 61, such as a liquid crystal display device (Liquid Crystal Display, LCD), an organic electroluminesence display (Organic Electroluminesence Display, OLED) display device, a quantum dot light emitting diode (Quantum Dot Light Emitting Diodes, QLED) display device or a curved display device, etc.

[0076] In one embodiment, the display panel 63 includes a pixel array consisting of a plurality of rows and columns of pixels.

[0077] The embodiments of the present application provide a fool-proof circuit, a connector, and a display device, which are connected to the input port of the connector through a comparison module, accept multiple input signals of the connector, and output a control signal according to the multiple input signals, so as to generate a voltage divider signal for controlling the conduction or shutoff of a power signal through the conduction or shutoff of a first switch module, so that the output of the power signal is promptly shut off when the connector is incorrectly plugged in, thereby avoiding the problem of the panel being unable to be used normally due to the burning of electronic components caused by the incorrect insertion of the connector.

[0078] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A foolproof circuit, characterized in that: include: A comparison module, connected to the input port of the connector, configured to receive a plurality of input signals of the connector and output a control signal according to the plurality of input signals; A first switch module, connected to the comparison module, and configured to be turned on or off according to the control signal; A voltage dividing module, connected to the power line and the first switch module respectively, for receiving a power signal on the power line and outputting a corresponding voltage dividing signal according to the on or off state of the first switch module; A second switch module, connected to the power line and the voltage divider module respectively, for receiving the power signal and the voltage divider signal, and controlling the on and off of the power signal according to the voltage divider signal; The comparison module includes an AND gate, and the AND gate includes at least one input terminal; The input end of the AND gate serves as the input end of the comparison module, and the output end of the AND gate serves as the output end of the comparison module; When the pins in the connector are abnormally plugged, a low level appears in the voltage signal received by the comparison module, and the control signal output by the comparison module is also a low level, the first switch module is turned off, the voltage divider module receives the power signal provided by the power line, and outputs a corresponding voltage divider signal, the second switch module is turned off after receiving the voltage divider signal, and the power signal stops being output; The pin signal in the connector is processed by the AND gate. If the levels of the pin signal in the connector are inconsistent, the AND gate outputs a low-level signal. If the levels of the pin signal in the connector are consistent, the AND gate outputs a high-level signal. When the pin signal in the connector is inconsistent, the AND gate performs AND processing to output a low-level signal, thereby cutting off the output of the power signal.

2. The foolproof circuit according to claim 1, characterized in that: The comparison module comprises: a first input terminal connected to a first pin of the connector, the first pin being located at a first side of the connector; and A second input terminal is connected to a second pin of the connector, and the second pin is located at a second side of the connector.

3. The foolproof circuit according to claim 1, characterized in that: The first switch module includes a first electronic switch tube, a control end of the first electronic switch tube being connected to the output end of the comparison module as the control end of the first switch module, a current output end of the first electronic switch tube being grounded as the output end of the first switch module, and a current input end of the first electronic switch tube being connected to the current output end of the voltage divider module as the input end of the first switch module.

4. The foolproof circuit according to claim 1, characterized in that: The voltage divider module comprises: a first resistance unit, wherein a first end of the first resistance unit is connected to an input end of the first switch module as a current output end of the voltage divider module; and A second resistor unit, wherein the first end of the second resistor unit is connected to the second end of the first resistor unit, serving as the voltage division signal output end of the voltage division module connected to the control end of the second switch module, and the second end of the second resistor unit is connected to the power line.

5. The foolproof circuit according to claim 1, characterized in that: The second switch module includes a second electronic switch tube, the control end of the second electronic switch tube is connected to the voltage divider signal output end of the voltage divider module as the control end of the second switch module, the current input end of the second electronic switch tube is connected to the power line as the input end of the second switch module, and the current output end of the second electronic switch tube is used as the output end of the second switch module.

6. The foolproof circuit according to claim 5, characterized in that: The second electronic switch tube is any one of a P-type metal oxide semiconductor field effect tube, a polycrystalline silicon thin film transistor, an amorphous silicon thin film transistor, a zinc oxide-based thin film transistor or an organic thin film transistor.

7. A connector, characterized in that: The connector includes an anti-foolproof circuit as described in any one of claims 1 to 6, and is used to connect the display panel and the screen driving board.

8. The connector according to claim 7, wherein: The wire material of the connector is a flexible flat cable.

9. A display device, characterized in that: include: Display panel; Screen driver board; as well as The connector according to claim 7.

Images