WO2022116309A1 - 时序控制驱动板、显示面板以及显示装置 - Google Patents

时序控制驱动板、显示面板以及显示装置 Download PDF

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Publication number
WO2022116309A1
WO2022116309A1 PCT/CN2020/138346 CN2020138346W WO2022116309A1 WO 2022116309 A1 WO2022116309 A1 WO 2022116309A1 CN 2020138346 W CN2020138346 W CN 2020138346W WO 2022116309 A1 WO2022116309 A1 WO 2022116309A1
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WO
WIPO (PCT)
Prior art keywords
fuse
circuit
timing control
protection circuit
overvoltage protection
Prior art date
Application number
PCT/CN2020/138346
Other languages
English (en)
French (fr)
Inventor
李新吉
Original Assignee
深圳市华星光电半导体显示技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市华星光电半导体显示技术有限公司 filed Critical 深圳市华星光电半导体显示技术有限公司
Priority to US17/270,876 priority Critical patent/US20230386423A1/en
Publication of WO2022116309A1 publication Critical patent/WO2022116309A1/zh

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Classifications

    • 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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/36—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 by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3696—Generation of voltages supplied to electrode drivers
    • 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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/36—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 by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/08—Details of timing specific for flat panels, other than clock recovery
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/04—Display protection

Definitions

  • the present invention relates to the field of display technology, in particular to a timing control driving board, a display panel and a display device.
  • timing control (TCON, timing controlle) driver board is what we often call the logic board, the central control board, the decompression board, and the decoding board. It is the key component for the LCD screen to display video image signals.
  • the function of the timing control driver board is to convert the LVDS image data input signal sent by the digital board to the LVDS signal that can drive the LCD screen after being processed by the timing control driver board, and then directly send it to the LVDS receiver chip of the LCD screen.
  • the clock signal is converted into a control signal that can be recognized by the screen, and the row and column signal RSDS controls the thin film transistor in the screen to work and control the twist of the liquid crystal molecules. Drive the LCD screen to display images.
  • the display power adapter directly provides the total power to the timing control driver board.
  • the existing design of the timing control driver board is 12v input, and uses a 13v transient diode (TVS, Transient Voltage Suppressor) to prevent excessive electrical stress (EOS, Electrical Over Stress).
  • TVS Transient Voltage Suppressor
  • EOS Electrical Over Stress
  • display universal adapters 12V and 19V. There is a risk of using the wrong adapter. If the wrong 19v adapter is used, it will damage the transient diode, cause the power supply to short-circuit and generate a large current, damage the power supply, and cause the display panel to go black and damage the display panel.
  • Embodiments of the present invention provide a timing control driver board, which aims to solve the problem of damage to the display panel in the prior art when the display panel is mismatched with power adapters.
  • the present invention provides a timing control driving board, which is applied to a display panel.
  • the timing control driving board includes a power supply circuit, a power management circuit, an overvoltage protection circuit and a transient diode.
  • the circuit is used to connect an external power adapter and provide an input voltage to the power management circuit, and the power management circuit is used to convert the input voltage into various voltages required for the operation of the display panel;
  • the first end of the power supply circuit is respectively connected to the first end of the transient diode and the first end of the power management circuit, and the second end of the power supply circuit is connected to the first end of the overvoltage protection circuit. terminal, the second terminal of the overvoltage protection circuit is respectively connected to the second terminal of the transient diode and the second terminal of the power management circuit, and the overvoltage protection circuit is connected to the first terminal when the input voltage is higher than the first terminal. It is disconnected at a preset voltage, wherein the power management circuit works normally when the input voltage is lower than the first preset voltage.
  • the timing control drive board further includes a first fuse, the first end of the first fuse is connected to the second end of the power supply circuit, and the second end of the first fuse is connected to the overvoltage protection the first end of the circuit.
  • the timing control driving board further includes a second fuse connected in series with the first fuse, the first end of the second fuse is connected with the second end of the first fuse, and the first end of the second fuse is connected to the second end of the first fuse. The two ends are connected to the first end of the overvoltage protection circuit.
  • the timing control driver board further includes an undervoltage protection circuit connected in series with the first fuse, and two ends of the undervoltage protection circuit are respectively connected to the second end of the first fuse and the second fuse The first end of the undervoltage protection circuit is disconnected when the input voltage is lower than a second preset voltage, so as to disconnect the first fuse and the second fuse.
  • the timing control driver board further includes a first capacitor, the first end of the first capacitor is connected to the first end of the overvoltage protection circuit, and the second ends of the first capacitor are respectively connected to the The first end of the transient diode and the first end of the power management circuit.
  • the timing control driving board further includes a second capacitor, the first end of the second capacitor is connected to the first end of the overvoltage protection circuit, and the second ends of the second capacitor are respectively connected to the The first end of the transient diode and the first end of the power management circuit.
  • the overvoltage protection circuit is a protection relay.
  • the first end of the power supply circuit is grounded.
  • the present invention provides a display panel, the display panel includes a timing control driving board, and the timing control driving board includes a power supply circuit, a power management circuit, an overvoltage protection circuit and a transient diode,
  • the power supply circuit is used to connect an external power adapter and provide an input voltage to the power management circuit, and the power management circuit is used to convert the input voltage into various voltages required for the operation of the display panel;
  • the first end of the power supply circuit is respectively connected to the first end of the transient diode and the first end of the power management circuit, and the second end of the power supply circuit is connected to the first end of the overvoltage protection circuit. terminal, the second terminal of the overvoltage protection circuit is respectively connected to the second terminal of the transient diode and the second terminal of the power management circuit, and the overvoltage protection circuit is connected to the first terminal when the input voltage is higher than the first terminal. It is disconnected at a preset voltage, wherein the power management circuit works normally when the input voltage is lower than the first preset voltage.
  • the timing control drive board further includes a first fuse, the first end of the first fuse is connected to the second end of the power supply circuit, and the second end of the first fuse is connected to the overvoltage protection the first end of the circuit.
  • the timing control driving board further includes a second fuse connected in series with the first fuse, the first end of the second fuse is connected with the second end of the first fuse, and the first end of the second fuse is connected to the second end of the first fuse. The two ends are connected to the first end of the overvoltage protection circuit.
  • the timing control driver board further includes an undervoltage protection circuit connected in series with the first fuse, and two ends of the undervoltage protection circuit are respectively connected to the second end of the first fuse and the second fuse The first end of the undervoltage protection circuit is disconnected when the input voltage is lower than a second preset voltage, so as to disconnect the first fuse and the second fuse.
  • the timing control driver board further includes a first capacitor, the first end of the first capacitor is connected to the first end of the overvoltage protection circuit, and the second ends of the first capacitor are respectively connected to the The first end of the transient diode and the first end of the power management circuit.
  • the timing control driving board further includes a second capacitor, the first end of the second capacitor is connected to the first end of the overvoltage protection circuit, and the second ends of the second capacitor are respectively connected to the The first end of the transient diode and the first end of the power management circuit.
  • the overvoltage protection circuit is a protection relay.
  • the first end of the power supply circuit is grounded.
  • the present invention provides a display device, the display device includes a display panel, the display panel includes a timing control driving board, and the timing control driving board includes a power supply circuit, a power management circuit, a a voltage protection circuit and a transient diode, the power supply circuit is used to connect an external power adapter and provide an input voltage to the power management circuit, and the power management circuit is used to convert the input voltage into the required power for the operation of the display panel various voltages;
  • the first end of the power supply circuit is respectively connected to the first end of the transient diode and the first end of the power management circuit, and the second end of the power supply circuit is connected to the first end of the overvoltage protection circuit. terminal, the second terminal of the overvoltage protection circuit is respectively connected to the second terminal of the transient diode and the second terminal of the power management circuit, and the overvoltage protection circuit is connected to the first terminal when the input voltage is higher than the first terminal. It is disconnected at a preset voltage, wherein the power management circuit works normally when the input voltage is lower than the first preset voltage.
  • the timing control drive board further includes a first fuse, the first end of the first fuse is connected to the second end of the power supply circuit, and the second end of the first fuse is connected to the overvoltage protection the first end of the circuit.
  • the timing control driving board further includes a second fuse connected in series with the first fuse, the first end of the second fuse is connected with the second end of the first fuse, and the first end of the second fuse is connected to the second end of the first fuse. The two ends are connected to the first end of the overvoltage protection circuit.
  • the timing control driver board further includes an undervoltage protection circuit connected in series with the first fuse, and two ends of the undervoltage protection circuit are respectively connected to the second end of the first fuse and the second fuse The first end of the undervoltage protection circuit is disconnected when the input voltage is lower than a second preset voltage, so as to disconnect the first fuse and the second fuse.
  • the present invention provides a timing control driving board, which is applied to a display panel, and the timing control driving board includes a power supply circuit, a power management circuit, an overvoltage protection circuit and a transient diode
  • the power supply circuit is used to connect the external power adapter and provide the input voltage to the power management circuit
  • the power management circuit is used to convert the input voltage into various voltages required for the operation of the display panel
  • the first ends of the power supply circuit are respectively connected to the transient diodes
  • the first end of the power management circuit, the second end of the power supply circuit is connected to the first end of the overvoltage protection circuit, and the second end of the overvoltage protection circuit is respectively connected to the second end of the transient diode, the power supply
  • the overvoltage protection circuit is disconnected when the input voltage is higher than the first preset voltage, wherein the power management circuit works normally when the input voltage is lower than the first preset voltage.
  • the connection between the power supply circuit and the power management circuit and the transient diode can be disconnected through the overvoltage protection circuit, so as to avoid the mismatch of the external power supply circuit.
  • the input voltage of the power adapter damages the power management circuit and the transient diode, which can prevent the display panel from being damaged when the power adapter mismatch occurs on the display panel.
  • FIG. 1 is a schematic structural diagram of an embodiment of a timing control driver board provided by an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of another embodiment of a timing control driver board provided by an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of another embodiment of a timing control driving board provided by an embodiment of the present invention.
  • first and second are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined as “first”, “second” may expressly or implicitly include one or more features. In the description of the present invention, “plurality” means two or more, unless otherwise expressly and specifically defined.
  • the word "exemplary” is used to mean “serving as an example, illustration or illustration”. Any embodiment of this disclosure described as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.
  • the following description is presented to enable any person skilled in the art to make and use the present invention. In the following description, details are set forth for the purpose of explanation. It will be understood by one of ordinary skill in the art that the present invention may be practiced without the use of these specific details. In other instances, well-known structures and procedures have not been described in detail so as not to obscure the description of the present invention with unnecessary detail. Thus, the present invention is not intended to be limited to the embodiments shown but is to be accorded the widest scope consistent with the principles and features disclosed herein.
  • An embodiment of the present invention provides a timing control driving board, which is applied to a display panel.
  • the timing control driving board includes a power supply circuit, a power management circuit, an overvoltage protection circuit and a transient diode.
  • the power supply circuit is used to connect an external power adapter and connect to the
  • the power management circuit provides the input voltage, and the power management circuit is used to convert the input voltage into various voltages required for the operation of the display panel; the first end of the power supply circuit is respectively connected to the first end of the transient diode and the first end of the power management circuit.
  • the second end of the power supply circuit is connected to the first end of the overvoltage protection circuit, and the second end of the overvoltage protection circuit is connected to the second end of the transient diode, the second end of the power management circuit, and the overvoltage protection circuit. Disconnect when the input voltage is higher than the first preset voltage, wherein the power management circuit works normally when the input voltage is lower than the first preset voltage.
  • the connection between the power supply circuit and the power management circuit and the transient diode can be disconnected through the overvoltage protection circuit, so as to avoid the mismatch of the external power supply circuit.
  • the input voltage of the power adapter damages the power management circuit and the transient diode, which can prevent the display panel from being damaged when the power adapter mismatch occurs on the display panel.
  • the timing control driving board of the embodiment of the present invention can be applied to various display panels. A detailed description will be given below.
  • FIG. 1 is a schematic structural diagram of an embodiment of a timing control driving board provided by an embodiment of the present invention.
  • the timing control driving board 10 is applied to a display panel.
  • the timing control driving board 10 includes a power supply circuit 11 , a power management circuit 14 , an overvoltage protection circuit 12 and a transient diode 13 .
  • the power supply circuit 11 is used to connect an external power adapter and provide an input voltage to the power management circuit 14, and the power management circuit 14 is used to convert the input voltage into various voltages required for the operation of the display panel; the first ends of the power supply circuit 11 are respectively connected to The first end of the transient diode 13, the first end of the power management circuit 14, the second end of the power supply circuit 11 are connected to the first end of the overvoltage protection circuit 12, and the second ends of the overvoltage protection circuit 12 are respectively connected to the The second end of the transient diode 13 and the second end of the power management circuit 14, the overvoltage protection circuit 12 is disconnected when the input voltage is higher than the first preset voltage, wherein the power management circuit 14 is when the voltage is lower than the first preset voltage. It works normally when the voltage is set. Further, the overvoltage protection circuit 12 is turned on when the input voltage is lower than the first preset voltage.
  • the transient diode 13 generally works in the reverse cut-off state in the circuit, and it does not affect any function of the circuit at this time. Under the specified reverse application conditions, when a large transient interference voltage or pulse current occurs in the circuit due to lightning and various electrical interference, the transient diode 13 quickly turns into a reverse conduction state in a very short time. , and clamp the voltage of the circuit to the required safety value, so as to effectively protect the precision components in the electronic circuit from damage. After the disturbance pulse has passed, the transient diode 13 is turned into a reverse cut-off state again. Since its clamping voltage is lower than the highest withstand voltage of other devices in the circuit during reverse conduction, it protects other components.
  • the power management circuit 14 is a power management chip.
  • a power management chip (PMIC, Power Management Integrated Circuits) is a chip that is responsible for power conversion, distribution, detection and other power management in the display panel. It is mainly responsible for identifying the CPU power supply amplitude, generating the corresponding short-moment wave, and promoting the power output of the subsequent circuit. Commonly used power management chips are HIP6301, IS6537, RT9237, ADP3168, KA7500, TL494, etc.
  • the power management circuit 14 converts the input voltage into voltages required for the operation of the display panel, such as VGH, VGL, VgoffL, VgoffH, and VCOM.
  • VGH refers to the high potential of the gate, which is the voltage at which the gate is turned on.
  • VGL is the low potential of the gate, which is the voltage that turns off the gate.
  • VCOM is the liquid crystal deflection reference voltage.
  • VDDA will divide 10 ⁇ 14 groups of voltages through the voltage divider circuit, which is used as the reference voltage of the output VGMA when the internal DAC of the power management chip is used. Through the voltage divider circuit of the PCB, multiple groups of reference voltages are generated. The voltage can reduce the voltage divider circuit inside the power management chip.
  • the first preset voltage is 13.2V, that is, the overvoltage protection circuit 12 turns on the overvoltage protection when the input voltage reaches 13.2V.
  • the maximum reverse working voltage of the transient diode 13 is 13.2V.
  • the maximum reverse working voltage is the maximum reverse voltage allowed to be applied when the diode is working. When this value is exceeded, the diode may be damaged due to reverse breakdown, usually a breakdown. half of the breakdown voltage.
  • the external power adapter can be a 12V or 19V power adapter.
  • the normal operating voltage of the power management circuit 14 is 12V.
  • the power supply circuit 11 provides an input voltage of 12V to the power management circuit 14, and the power management circuit 14 works normally.
  • the external power adapter is a 19V power adapter
  • the power supply circuit 11 provides the power management circuit 14 with With an input voltage of 19V, the power management circuit 14 is overloaded.
  • the overvoltage protection circuit 12 is a protection relay.
  • a protection relay is an electrical control device, which is an electrical appliance that makes a predetermined step change of the controlled quantity in the electrical output circuit when the change of the input quantity meets the specified requirements. It has the interactive relationship between the control system and the controlled system. Usually used in automated control circuits, it is actually an "automatic switch" that uses a small current to control the operation of a large current. Therefore, it plays the role of automatic adjustment, safety protection, and conversion circuit in the circuit.
  • the power management circuit 14 when the input voltage exceeds 13.2V, the power management circuit 14 is overloaded, and the large current in the protection relay causes it to overheat and deform and disconnect the contacts, thereby cutting off the circuit to prevent the failure from expanding. After cooling for a period of time, its deformation will slowly reset, and the protection relay will be turned on. Therefore, even if the display cannot be used temporarily when the adapter is mismatched, it can continue to be used after the adapter is unplugged without damaging the power supply circuit 11 and the display panel.
  • the power adapter When the external power adapter is 12V, the power adapter is properly adapted, the input voltage does not exceed the first preset voltage, and the overvoltage protection circuit 12 does not work; the voltage across the transient diode 13 does not exceed the maximum voltage of the transient diode 13. Therefore, the transient diode 13 is in a reverse cut-off state. At this time, the power management circuit 14 works normally, the entire protection circuit does not work, and does not cause interference to the power management circuit 14 .
  • the power adapter When the external power adapter is 19V, the power adapter is adapted incorrectly, the input voltage does not exceed the first preset voltage, and the overvoltage protection circuit 12 is disconnected; the transient diode 13 is still in the reverse cut-off state, which will not damage the transient Diode, the power supply circuit 11 will not be short-circuited, thereby avoiding damage to the display panel power supply circuit 11 and the transient diode 13, and preventing damage to the display panel.
  • the input voltage instantly rises to a larger value, the transient diode 13 quickly switches to the reverse direction in a very short time. ON state and clamps the voltage of the circuit to the required safe value. After the input voltage is released, the transient diode 13 turns into a reverse cut-off state to continue to ensure the normal operation of the power management circuit 14 .
  • FIG. 2 is a schematic structural diagram of another embodiment of a timing control driving board provided by an embodiment of the present invention.
  • the timing control driving board 10 further includes a first fuse F1, the first end of the first fuse F1 is connected to the second end of the power supply circuit 11, and the second end of the first fuse F1 is connected to the overvoltage protection circuit 12's first end.
  • Fuses are also called current fuses, and the IEC127 standard defines them as fuse links. It mainly plays the role of overload protection. If the fuse is properly placed in the circuit, the fuse will cut off the current when the current abnormally rises to a certain height and heat, thus protecting the safe operation of the circuit.
  • the first fuse F1 may be disconnected when the power management circuit 14 operates under a high voltage for a certain period of time, so as to protect the power management circuit 14 .
  • the timing control driving board 10 further includes a first capacitor C1, the first end of the first capacitor C1 is connected to the first end of the overvoltage protection circuit 12, and the second end of the first capacitor C1 is respectively connected to the instantaneous The first end of the state diode 13 and the first end of the power management circuit 14 .
  • the first capacitor C1 By connecting the first capacitor C1 in parallel, it can play the role of voltage stabilization and filtering.
  • the timing control driving board 10 further includes a second capacitor C2, the first end of the second capacitor C2 is connected to the first end of the overvoltage protection circuit 12, and the second ends of the second capacitor C2 are respectively connected to the instantaneous The first end of the state diode 13 and the first end of the power management circuit 14 .
  • the first capacitor C1 and the second capacitor C2 in parallel, the function of voltage stabilization and filtering can be further achieved.
  • 3, 4, 5 or more capacitors can be connected in parallel, which is not covered by the present invention. limited.
  • the first end of the power supply circuit 11 is grounded.
  • FIG. 3 is a schematic structural diagram of another embodiment of a timing control driving board provided by an embodiment of the present invention.
  • the timing control drive board 10 further includes a second fuse F2 connected in series with the first fuse F1, the first end of the second fuse F2 is connected to the second end of the first fuse F1, and the second end of the second fuse F2 is connected to the second end of the first fuse F1.
  • the two terminals are connected to the first terminal of the overvoltage protection circuit 12 .
  • the timing control driving board 10 further includes an undervoltage protection circuit 15 connected in series with the first fuse F1, and both ends of the undervoltage protection circuit 15 are respectively connected to the second end of the first fuse F1 and the second fuse F2
  • the first end of the under-voltage protection circuit 15 is disconnected when the input voltage is lower than the second preset voltage, so as to disconnect the first fuse F1 and the second fuse F2.
  • the second preset voltage may be 10V-11V.
  • the under-voltage protection circuit 15 can be a voltage-loss trip circuit breaker.
  • the voltage-loss trip circuit breaker itself has a voltage-loss release device. At a certain specified value, the suction force of the electromagnet of the loss-of-voltage release becomes smaller, so the lever rotation is used for the release mechanism to disconnect the circuit breaker.
  • the present invention also provides a display panel, the display panel includes any one of the above timing control driving boards.
  • the present invention also provides a display device, the display device includes any one of the above display panels.
  • the present invention provides a timing control driving board, which is applied to a display panel, and the timing control driving board includes a power supply circuit, a power management circuit, an overvoltage protection circuit and a transient diode
  • the power supply circuit is used to connect the external power adapter and provide the input voltage to the power management circuit
  • the power management circuit is used to convert the input voltage into various voltages required for the operation of the display panel
  • the first ends of the power supply circuit are respectively connected to the transient diodes
  • the first end of the power management circuit, the second end of the power supply circuit is connected to the first end of the overvoltage protection circuit, and the second end of the overvoltage protection circuit is respectively connected to the second end of the transient diode, the power supply
  • the overvoltage protection circuit is disconnected when the input voltage is higher than the first preset voltage, wherein the power management circuit works normally when the input voltage is lower than the first preset voltage.
  • the connection between the power supply circuit and the power management circuit and the transient diode can be disconnected through the overvoltage protection circuit, so as to avoid the mismatch of the external power supply circuit.
  • the input voltage of the power adapter damages the power management circuit and the transient diode, which can prevent the display panel from being damaged when the power adapter mismatch occurs on the display panel.
  • the display panels of the embodiments of the present invention may also include any other necessary structures as required. Specifically, here Not limited.
  • the above units or structures can be implemented as independent entities, or can be arbitrarily combined to be implemented as the same or several entities.
  • a timing control driving board, a display panel, and a display device provided by the embodiments of the present invention have been described above in detail.
  • the principles and embodiments of the present invention are described with specific examples. The descriptions of the above embodiments are only used for In order to help understand the method of the present invention and its core idea; at the same time, for those skilled in the art, according to the idea of the present invention, there will be changes in specific embodiments and application scope. It is construed as a limitation of the present invention.

Abstract

一种时序控制驱动板（10）、显示面板以及显示装置，时序控制驱动板（10）包括供电电路（11）、电源管理电路（14）、过压保护电路（12）以及瞬态二极管（13），供电电路（11）的第二端连接于过压保护电路（12）的第一端，过压保护电路（12）的第二端分别连接于瞬态二极管（13）的第二端、电源管理电路（14）的第二端，过压保护电路（12）在输入电压高于第一预设电压时断开。

Description

时序控制驱动板、显示面板以及显示装置 技术领域
本发明涉及显示技术领域，具体涉及一种时序控制驱动板、显示面板以及显示装置。
 背景技术
目前，液晶显示装置作为电子设备的显示部件已经广泛的应用于各种电子产品中。时序控制（TCON，timing controlle）驱动板就是我们常说的逻辑板、中控板、解压板、解码板，是液晶屏显示视频图像信号的关键部件。时序控制驱动板的作用是把数字板送来的LVDS图像数据输入信号通过时序控制驱动板处理后，转换成能驱动液晶屏的LVDS信号，再直接送往液晶屏的LVDS接收芯片。通过处理移位寄存器存储将图像数据信号，时钟信号转换成屏能够识别的控制信号，行列信号RSDS控制屏内的薄膜晶体管工作而控制液晶分子的扭曲度。驱动液晶屏显示图像。
显示器电源适配器直接通过给时序控制驱动板提供总电源。时序控制驱动板现有设计是12v输入，并使用13v的瞬态二极管（TVS，Transient Voltage Suppressor）防过度电性应力(EOS，Electrical Over Stress）。但显示器通用适配器有12V和19V两种，存在错用适配器的风险，如用错19v适配器会导致损坏瞬态二极管，引起电源短路产生大电流，损坏电源，导致显示面板黑屏，损坏显示面板。
即，现有技术中，当显示面板发生电源适配器错配时会损坏显示面板。
 技术问题
本发明实施例提供一种时序控制驱动板，旨在解决现有技术中当显示面板发生电源适配器错配时损坏显示面板的问题。
 技术解决方案
为解决上述问题，第一方面，本发明提供一种时序控制驱动板，应用于显示面板，所述时序控制驱动板包括供电电路、电源管理电路、过压保护电路以及瞬态二极管，所述供电电路用于连接外部电源适配器，并向所述电源管理电路提供输入电压，所述电源管理电路用于将所述输入电压转换成显示面板工作所需的各种电压；
所述供电电路的第一端分别连接于所述瞬态二极管的第一端、所述电源管理电路的第一端，所述供电电路的第二端连接于所述过压保护电路的第一端，所述过压保护电路的第二端分别连接于所述瞬态二极管的第二端、所述电源管理电路的第二端，所述过压保护电路在所述输入电压高于第一预设电压时断开，其中，所述电源管理电路在所述输入电压低于所述第一预设电压时正常工作。
其中，所述时序控制驱动板还包括第一保险丝，所述第一保险丝的第一端连接于所述供电电路的第二端，所述第一保险丝的第二端连接于所述过压保护电路的第一端。
其中，所述时序控制驱动板还包括与所述第一保险丝串联的第二保险丝，所述第二保险丝的第一端与所述第一保险丝的第二端连接，所述第二保险丝的第二端连接于所述过压保护电路的第一端。
其中，所述时序控制驱动板还包括与所述第一保险丝串联的欠压保护电路，所述欠压保护电路的两端分别连接于所述第一保险丝的第二端和所述第二保险丝的第一端，所述欠压保护电路在所述输入电压低于第二预设电压时断开，以断开所述第一保险丝和所述第二保险丝。
其中，所述时序控制驱动板还包括第一电容，所述第一电容的第一端连接于所述过压保护电路的第一端，所述第一电容的第二端分别连接于所述瞬态二极管的第一端、所述电源管理电路的第一端。
其中，所述时序控制驱动板还包括第二电容，所述第二电容的第一端连接于所述过压保护电路的第一端，所述第二电容的第二端分别连接于所述瞬态二极管的第一端、所述电源管理电路的第一端。
其中，所述过压保护电路为保护继电器。
其中，所述供电电路的第一端接地。
为解决上述问题，第二方面，本发明提供一种显示面板，所述显示面板包括时序控制驱动板，所述时序控制驱动板包括供电电路、电源管理电路、过压保护电路以及瞬态二极管，所述供电电路用于连接外部电源适配器，并向所述电源管理电路提供输入电压，所述电源管理电路用于将所述输入电压转换成显示面板工作所需的各种电压；
所述供电电路的第一端分别连接于所述瞬态二极管的第一端、所述电源管理电路的第一端，所述供电电路的第二端连接于所述过压保护电路的第一端，所述过压保护电路的第二端分别连接于所述瞬态二极管的第二端、所述电源管理电路的第二端，所述过压保护电路在所述输入电压高于第一预设电压时断开，其中，所述电源管理电路在所述输入电压低于所述第一预设电压时正常工作。
其中，所述时序控制驱动板还包括第一保险丝，所述第一保险丝的第一端连接于所述供电电路的第二端，所述第一保险丝的第二端连接于所述过压保护电路的第一端。
其中，所述时序控制驱动板还包括与所述第一保险丝串联的第二保险丝，所述第二保险丝的第一端与所述第一保险丝的第二端连接，所述第二保险丝的第二端连接于所述过压保护电路的第一端。
其中，所述时序控制驱动板还包括与所述第一保险丝串联的欠压保护电路，所述欠压保护电路的两端分别连接于所述第一保险丝的第二端和所述第二保险丝的第一端，所述欠压保护电路在所述输入电压低于第二预设电压时断开，以断开所述第一保险丝和所述第二保险丝。
其中，所述时序控制驱动板还包括第一电容，所述第一电容的第一端连接于所述过压保护电路的第一端，所述第一电容的第二端分别连接于所述瞬态二极管的第一端、所述电源管理电路的第一端。
其中，所述时序控制驱动板还包括第二电容，所述第二电容的第一端连接于所述过压保护电路的第一端，所述第二电容的第二端分别连接于所述瞬态二极管的第一端、所述电源管理电路的第一端。
其中，所述过压保护电路为保护继电器。
其中，所述供电电路的第一端接地。
为解决上述问题，第三方面，本发明提供一种显示装置，所述显示装置包括显示面板，所述显示面板包括时序控制驱动板，所述时序控制驱动板包括供电电路、电源管理电路、过压保护电路以及瞬态二极管，所述供电电路用于连接外部电源适配器，并向所述电源管理电路提供输入电压，所述电源管理电路用于将所述输入电压转换成显示面板工作所需的各种电压；
所述供电电路的第一端分别连接于所述瞬态二极管的第一端、所述电源管理电路的第一端，所述供电电路的第二端连接于所述过压保护电路的第一端，所述过压保护电路的第二端分别连接于所述瞬态二极管的第二端、所述电源管理电路的第二端，所述过压保护电路在所述输入电压高于第一预设电压时断开，其中，所述电源管理电路在所述输入电压低于所述第一预设电压时正常工作。
其中，所述时序控制驱动板还包括第一保险丝，所述第一保险丝的第一端连接于所述供电电路的第二端，所述第一保险丝的第二端连接于所述过压保护电路的第一端。
其中，所述时序控制驱动板还包括与所述第一保险丝串联的第二保险丝，所述第二保险丝的第一端与所述第一保险丝的第二端连接，所述第二保险丝的第二端连接于所述过压保护电路的第一端。
其中，所述时序控制驱动板还包括与所述第一保险丝串联的欠压保护电路，所述欠压保护电路的两端分别连接于所述第一保险丝的第二端和所述第二保险丝的第一端，所述欠压保护电路在所述输入电压低于第二预设电压时断开，以断开所述第一保险丝和所述第二保险丝。
 有益效果
本发明的有益效果是：区别于现有技术，本发明提供一种时序控制驱动板，应用于显示面板，该时序控制驱动板包括供电电路、电源管理电路、过压保护电路以及瞬态二极管，供电电路用于连接外部电源适配器，并向电源管理电路提供输入电压，电源管理电路用于将输入电压转换成显示面板工作所需的各种电压；供电电路的第一端分别连接于瞬态二极管的第一端、电源管理电路的第一端，供电电路的第二端连接于过压保护电路的第一端，过压保护电路的第二端分别连接于瞬态二极管的第二端、电源管理电路的第二端，过压保护电路在输入电压高于第一预设电压时断开，其中，电源管理电路在输入电压低于第一预设电压时正常工作。本发明在外部电源适配器错配导致供电电路提供的输入电压高于电源管理电路的工作电压时，通过过压保护电路断开供电电路与电源管理电路及瞬态二极管的连接，可以避免错配外部电源适配器的输入电压损坏电源管理电路及瞬态二极管，可以避免当显示面板发生电源适配器错配时损坏显示面板。
 附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本发明实施例提供的一种时序控制驱动板一实施例结构示意图；
图2是本发明实施例提供的一种时序控制驱动板另一实施例结构示意图；
图3是本发明实施例提供的一种时序控制驱动板又一实施例结构示意图。
 本发明的实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
在本发明的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个特征。在本发明的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
在本发明中，“示例性”一词用来表示“用作例子、例证或说明”。本发明中被描述为“示例性”的任何实施例不一定被解释为比其它实施例更优选或更具优势。为了使本领域任何技术人员能够实现和使用本发明，给出了以下描述。在以下描述中，为了解释的目的而列出了细节。应当明白的是，本领域普通技术人员可以认识到，在不使用这些特定细节的情况下也可以实现本发明。在其它实例中，不会对公知的结构和过程进行详细阐述，以避免不必要的细节使本发明的描述变得晦涩。因此，本发明并非旨在限于所示的实施例，而是与符合本发明所公开的原理和特征的最广范围相一致。
本发明实施例提供一种时序控制驱动板，应用于显示面板，该时序控制驱动板包括供电电路、电源管理电路、过压保护电路以及瞬态二极管，供电电路用于连接外部电源适配器，并向电源管理电路提供输入电压，电源管理电路用于将输入电压转换成显示面板工作所需的各种电压；供电电路的第一端分别连接于瞬态二极管的第一端、电源管理电路的第一端，供电电路的第二端连接于过压保护电路的第一端，过压保护电路的第二端分别连接于瞬态二极管的第二端、电源管理电路的第二端，过压保护电路在输入电压高于第一预设电压时断开，其中，电源管理电路在输入电压低于第一预设电压时正常工作。本发明在外部电源适配器错配导致供电电路提供的输入电压高于电源管理电路的工作电压时，通过过压保护电路断开供电电路与电源管理电路及瞬态二极管的连接，可以避免错配外部电源适配器的输入电压损坏电源管理电路及瞬态二极管，可以避免当显示面板发生电源适配器错配时损坏显示面板。本发明实施例的时序控制驱动板可以应用于各种显示面板中。以下进行详细说明。
请参阅图1，图1是本发明实施例提供的一种时序控制驱动板一实施例结构示意图。
如图1所示，本发明实施例中，该时序控制驱动板10应用于显示面板，该时序控制驱动板10包括供电电路11、电源管理电路14、过压保护电路12以及瞬态二极管13。
供电电路11用于连接外部电源适配器，并向电源管理电路14提供输入电压，电源管理电路14用于将输入电压转换成显示面板工作所需的各种电压；供电电路11的第一端分别连接于瞬态二极管13的第一端、电源管理电路14的第一端，供电电路11的第二端连接于过压保护电路12的第一端，过压保护电路12的第二端分别连接于瞬态二极管13的第二端、电源管理电路14的第二端，过压保护电路12在输入电压高于第一预设电压时断开，其中，电源管理电路14在电压低于第一预设电压时正常工作。进一步的，过压保护电路12在输入电压低于第一预设电压时导通。
瞬态二极管13在电路中一般工作于反向截止状态，此时它不影响电路的任何功能。瞬态二极管13在规定的反向应用条件下，当电路中由于雷电、各种电器干扰出现大幅度的瞬态干扰电压或脉冲电流时，它在极短的时间内迅速转入反向导通状态，并将电路的电压箝位在所要求的安全数值上，从而有效的保护电子线路中精密元器件免受损坏。干扰脉冲过去后，瞬态二极管13又转入反向截止状态。由于在反向导通时，其箝位电压低于电路中其它器件的最高耐压，因此起到了对其它元器件的保护作用。
其中，电源管理电路14为电源管理芯片。电源管理芯片（PMIC，Power Management Integrated Circuits）是在显示面板中担负起对电能的变换、分配、检测及其他电能管理的职责的芯片。主要负责识别CPU供电幅值，产生相应的短矩波，推动后级电路进行功率输出。常用电源管理芯片有HIP6301、IS6537、RT9237、ADP3168、KA7500、TL494等。电源管理电路14把输入电压转换成显示面板工作所需的电压，例如VGH、VGL、VgoffL、VgoffH以及VCOM等。
VGH是指栅极的高电位，也就是打开栅极的电压。VGL是栅极的低电位，也就是关闭栅极的电压。VCOM是液晶偏转基准电压，在PCB上VDDA会通过分压的回路分出10~14组电压，作为电源管理芯片内部DAC时的输出VGMA的基准电压，通过PCB的分压电路，产生多组参考电压,可以减少电源管理芯片内部的分压电路。
在一个具体的实施例中，第一预设电压为13.2V，即过压保护电路12在输入电压达到13.2V时开启过压保护。瞬态二极管13的最高反向工作电压为13.2V，最高反向工作电压是二极管工作时允许外加的最大反向电压，超过此值时，二极管有可能因为反向击穿而损坏，通常为击穿电压的一半。外部电源适配器可以是12V或19V的电源适配器。电源管理电路14的正常工作电压为12V。当外部电源适配器为12V的电源适配器，供电电路11向电源管理电路14提供12V的输入电压，电源管理电路14正常工作，当外部电源适配器为19V的电源适配器，供电电路11向电源管理电路14提供19V的输入电压，电源管理电路14过载。
在一个具体的实施例中，过压保护电路12为保护继电器。保护继电器是一种电控制器件，是当输入量的变化达到规定要求时，在电气输出电路中使被控量发生预定的阶跃变化的一种电器。它具有控制系统和被控制系统之间的互动关系。通常应用于自动化的控制电路中，它实际上是用小电流去控制大电流运作的一种“自动开关”。故在电路中起着自动调节、安全保护、转换电路等作用。例如，以保护继电器常见的热继电器为例，当输入电压超过13.2V时，电源管理电路14过载，保护继电器里的大电流使自身过热发生形变而断开触点，从而切断电路防止故障扩大，当冷却一段时间后，自身形变会慢慢复位，保护继电器导通。因此，即使显示器在错配适配器时暂时无法使用，也可以在拔掉适配器之后继续使用，不会损坏供电电路11，也不会损坏显示面板。
当外部电源适配器为12V时，此时电源适配器适配正确，输入电压没有超过第一预设电压，过压保护电路12不工作；瞬态二极管13两端的电压不超过瞬态二极管13的最高反向工作电压，因此，瞬态二极管13处于反向截止状态，此时电源管理电路14正常工作，整个保护电路不起作用，不对电源管理电路14造成干扰。
当外部电源适配器为19V时，此时电源适配器适配错误，输入电压没有超过第一预设电压，过压保护电路12断开；瞬态二极管13仍然处于反向截止状态，不会损坏瞬态二级管，供电电路11不会短路，从而避免了显示面板供电电路11和瞬态二极管13损坏，避免显示面板损坏。
当供电电路11发生ESD （静电放电，Electro-Static Discharge）、漏电、雷电、各种电器干扰导致输入电压瞬间提升至较大值时，瞬态二极管13在极短的时间内迅速转入反向导通状态，并将电路的电压箝位在所要求的安全数值上。在输入电压释放后，瞬态二极管13转入反向截止状态，继续保证电源管理电路14正常工作。
进一步的，参阅图2，图2是本发明实施例提供的一种时序控制驱动板另一实施例结构示意图。
本发明实施例中，时序控制驱动板10还包括第一保险丝F1，第一保险丝F1的第一端连接于供电电路11的第二端，第一保险丝F1的第二端连接于过压保护电路12的第一端。保险丝也被称为电流保险丝，IEC127标准将它定义为熔断体。其主要是起过载保护作用。电路中正确安置保险丝，保险丝就会在电流异常升高到一定的高度和热度的时候，自身熔断切断电流，保护了电路安全运行。第一保险丝F1可以在电源管理电路14持续一定时间在高压下工作时断开，以保护电源管理电路14。
本发明实施例中，时序控制驱动板10还包括第一电容C1，第一电容C1的第一端连接于过压保护电路12的第一端，第一电容C1的第二端分别连接于瞬态二极管13的第一端、电源管理电路14的第一端。通过并联第一电容C1可以起到稳压滤波作用。
本发明实施例中，时序控制驱动板10还包括第二电容C2，第二电容C2的第一端连接于过压保护电路12的第一端，第二电容C2的第二端分别连接于瞬态二极管13的第一端、电源管理电路14的第一端。通过并联第一电容C1和第二电容C2可以进一步起到稳压滤波作用，当然，在其他实施例中，还可以并联3个、4个、5个或者更多个电容，本发明对此不作限定。
本发明实施例中，供电电路11的第一端接地。
进一步的，参阅图3，图3是本发明实施例提供的一种时序控制驱动板又一实施例结构示意图。
本发明实施例中，时序控制驱动板10还包括与第一保险丝F1串联的第二保险丝F2，第二保险丝F2的第一端与第一保险丝F1的第二端连接，第二保险丝F2的第二端连接于过压保护电路12的第一端。串联设置两个保险丝，能够避免单个保险丝无法及时熔断导致电源管理电路14损坏，提高电路稳定性。当然，在其他实施例中，还可以串联3个、4个、5个或者更多个保险丝，本发明对此不作限定。
本发明实施例中，时序控制驱动板10还包括与第一保险丝F1串联的欠压保护电路15，欠压保护电路15的两端分别连接于第一保险丝F1的第二端和第二保险丝F2的第一端，欠压保护电路15在输入电压低于第二预设电压时断开，以断开第一保险丝F1和第二保险丝F2。其中，第二预设电压可以是10V-11V。欠压保护电路15可以是失压脱扣断路器，失压脱扣断路器本身具备失压脱扣装置，失压脱扣器的线圈经按钮和联动接点接于相间电压，当输入电压降低到某一规定值时，失压脱扣器的电磁铁的吸力变小，因此杠杆转动作用于脱扣机构，使断路器断开。
进一步的，本发明还提供一种显示面板，显示面板包括以上任意一项的时序控制驱动板。
进一步的，本发明还提供一种显示装置，显示装置包括以上任意一项的显示面板。
本发明的有益效果是：区别于现有技术，本发明提供一种时序控制驱动板，应用于显示面板，该时序控制驱动板包括供电电路、电源管理电路、过压保护电路以及瞬态二极管，供电电路用于连接外部电源适配器，并向电源管理电路提供输入电压，电源管理电路用于将输入电压转换成显示面板工作所需的各种电压；供电电路的第一端分别连接于瞬态二极管的第一端、电源管理电路的第一端，供电电路的第二端连接于过压保护电路的第一端，过压保护电路的第二端分别连接于瞬态二极管的第二端、电源管理电路的第二端，过压保护电路在输入电压高于第一预设电压时断开，其中，电源管理电路在输入电压低于第一预设电压时正常工作。本发明在外部电源适配器错配导致供电电路提供的输入电压高于电源管理电路的工作电压时，通过过压保护电路断开供电电路与电源管理电路及瞬态二极管的连接，可以避免错配外部电源适配器的输入电压损坏电源管理电路及瞬态二极管，可以避免当显示面板发生电源适配器错配时损坏显示面板。
需要说明的是，上述显示面板实施例中仅描述了上述结构，可以理解的是，除了上述结构之外，本发明实施例显示面板中，还可以根据需要包括任何其他的必要结构，具体此处不作限定。
具体实施时，以上各个单元或结构可以作为独立的实体来实现，也可以进行任意组合，作为同一或若干个实体来实现，以上各个单元或结构的具体实施可参见前面的方法实施例，在此不再赘述。
以上对本发明实施例所提供的一种时序控制驱动板、显示面板以及显示装置进行了详细介绍，本文中应用了具体个例对本发明的原理及实施例进行了阐述，以上实施例的说明只是用于帮助理解本发明的方法及其核心思想；同时，对于本领域的技术人员，依据本发明的思想，在具体实施例及应用范围上均会有改变之处，综上，本说明书内容不应理解为对本发明的限制。

Claims (20)

  1. 一种时序控制驱动板，其中，应用于显示面板，所述时序控制驱动板包括供电电路、电源管理电路、过压保护电路以及瞬态二极管，所述供电电路用于连接外部电源适配器，并向所述电源管理电路提供输入电压，所述电源管理电路用于将所述输入电压转换成显示面板工作所需的各种电压；
    所述供电电路的第一端分别连接于所述瞬态二极管的第一端、所述电源管理电路的第一端，所述供电电路的第二端连接于所述过压保护电路的第一端，所述过压保护电路的第二端分别连接于所述瞬态二极管的第二端、所述电源管理电路的第二端，所述过压保护电路在所述输入电压高于第一预设电压时断开，其中，所述电源管理电路在所述输入电压低于所述第一预设电压时正常工作。
  2. 根据权利要求1所述的时序控制驱动板，其中，所述时序控制驱动板还包括第一保险丝，所述第一保险丝的第一端连接于所述供电电路的第二端，所述第一保险丝的第二端连接于所述过压保护电路的第一端。
  3. 根据权利要求2所述的时序控制驱动板，其中，所述时序控制驱动板还包括与所述第一保险丝串联的第二保险丝，所述第二保险丝的第一端与所述第一保险丝的第二端连接，所述第二保险丝的第二端连接于所述过压保护电路的第一端。
  4. 根据权利要求3所述的时序控制驱动板，其中，所述时序控制驱动板还包括与所述第一保险丝串联的欠压保护电路，所述欠压保护电路的两端分别连接于所述第一保险丝的第二端和所述第二保险丝的第一端，所述欠压保护电路在所述输入电压低于第二预设电压时断开，以断开所述第一保险丝和所述第二保险丝。
  5. 根据权利要求1所述的时序控制驱动板，其中，所述时序控制驱动板还包括第一电容，所述第一电容的第一端连接于所述过压保护电路的第一端，所述第一电容的第二端分别连接于所述瞬态二极管的第一端、所述电源管理电路的第一端。
  6. 根据权利要求5所述的时序控制驱动板，其中，所述时序控制驱动板还包括第二电容，所述第二电容的第一端连接于所述过压保护电路的第一端，所述第二电容的第二端分别连接于所述瞬态二极管的第一端、所述电源管理电路的第一端。
  7. 根据权利要求1所述的时序控制驱动板，其中，所述过压保护电路为保护继电器。
  8. 根据权利要求1所述的时序控制驱动板，其中，所述供电电路的第一端接地。
  9. 一种显示面板，其中，所述显示面板包括时序控制驱动板，所述时序控制驱动板包括供电电路、电源管理电路、过压保护电路以及瞬态二极管，所述供电电路用于连接外部电源适配器，并向所述电源管理电路提供输入电压，所述电源管理电路用于将所述输入电压转换成显示面板工作所需的各种电压；
    所述供电电路的第一端分别连接于所述瞬态二极管的第一端、所述电源管理电路的第一端，所述供电电路的第二端连接于所述过压保护电路的第一端，所述过压保护电路的第二端分别连接于所述瞬态二极管的第二端、所述电源管理电路的第二端，所述过压保护电路在所述输入电压高于第一预设电压时断开，其中，所述电源管理电路在所述输入电压低于所述第一预设电压时正常工作。
  10. 根据权利要求9所述的显示面板，其中，所述时序控制驱动板还包括第一保险丝，所述第一保险丝的第一端连接于所述供电电路的第二端，所述第一保险丝的第二端连接于所述过压保护电路的第一端。
  11. 根据权利要求10所述的显示面板，其中，所述时序控制驱动板还包括与所述第一保险丝串联的第二保险丝，所述第二保险丝的第一端与所述第一保险丝的第二端连接，所述第二保险丝的第二端连接于所述过压保护电路的第一端。
  12. 根据权利要求11所述的显示面板，其中，所述时序控制驱动板还包括与所述第一保险丝串联的欠压保护电路，所述欠压保护电路的两端分别连接于所述第一保险丝的第二端和所述第二保险丝的第一端，所述欠压保护电路在所述输入电压低于第二预设电压时断开，以断开所述第一保险丝和所述第二保险丝。
  13. 根据权利要求9所述的显示面板，其中，所述时序控制驱动板还包括第一电容，所述第一电容的第一端连接于所述过压保护电路的第一端，所述第一电容的第二端分别连接于所述瞬态二极管的第一端、所述电源管理电路的第一端。
  14. 根据权利要求13所述的显示面板，其中，所述时序控制驱动板还包括第二电容，所述第二电容的第一端连接于所述过压保护电路的第一端，所述第二电容的第二端分别连接于所述瞬态二极管的第一端、所述电源管理电路的第一端。
  15. 根据权利要求9所述的显示面板，其中，所述过压保护电路为保护继电器。
  16. 根据权利要求9所述的显示面板，其中，所述供电电路的第一端接地。
  17. 一种显示装置，其中，所述显示装置包括显示面板，所述显示面板包括时序控制驱动板，所述时序控制驱动板包括供电电路、电源管理电路、过压保护电路以及瞬态二极管，所述供电电路用于连接外部电源适配器，并向所述电源管理电路提供输入电压，所述电源管理电路用于将所述输入电压转换成显示面板工作所需的各种电压；
    所述供电电路的第一端分别连接于所述瞬态二极管的第一端、所述电源管理电路的第一端，所述供电电路的第二端连接于所述过压保护电路的第一端，所述过压保护电路的第二端分别连接于所述瞬态二极管的第二端、所述电源管理电路的第二端，所述过压保护电路在所述输入电压高于第一预设电压时断开，其中，所述电源管理电路在所述输入电压低于所述第一预设电压时正常工作。
  18. 根据权利要求17所述的显示装置，其中，所述时序控制驱动板还包括第一保险丝，所述第一保险丝的第一端连接于所述供电电路的第二端，所述第一保险丝的第二端连接于所述过压保护电路的第一端。
  19. 根据权利要求18所述的显示装置，其中，所述时序控制驱动板还包括与所述第一保险丝串联的第二保险丝，所述第二保险丝的第一端与所述第一保险丝的第二端连接，所述第二保险丝的第二端连接于所述过压保护电路的第一端。
  20. 根据权利要求19所述的显示装置，其中，所述时序控制驱动板还包括与所述第一保险丝串联的欠压保护电路，所述欠压保护电路的两端分别连接于所述第一保险丝的第二端和所述第二保险丝的第一端，所述欠压保护电路在所述输入电压低于第二预设电压时断开，以断开所述第一保险丝和所述第二保险丝。
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