WO2019233025A1 - Display device - Google Patents

Display device Download PDF

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Publication number
WO2019233025A1
WO2019233025A1 PCT/CN2018/113277 CN2018113277W WO2019233025A1 WO 2019233025 A1 WO2019233025 A1 WO 2019233025A1 CN 2018113277 W CN2018113277 W CN 2018113277W WO 2019233025 A1 WO2019233025 A1 WO 2019233025A1
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WO
WIPO (PCT)
Prior art keywords
low
control signal
frequency control
bus
display device
Prior art date
Application number
PCT/CN2018/113277
Other languages
French (fr)
Chinese (zh)
Inventor
吕晓文
陈书志
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
Publication of WO2019233025A1 publication Critical patent/WO2019233025A1/en

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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
    • G09G3/3674—Details of drivers for scan electrodes
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3266—Details of drivers for scan electrodes

Definitions

  • the present invention relates to the field of display technology, and in particular, to a display device.
  • the display device includes at least an array substrate provided with a pixel array. Generally, a display area of the array substrate is provided with scan lines, data lines, and pixel electrodes located in the pixel area.
  • the display device also includes a gate driving circuit located in a peripheral area or a circuit board. And source drive circuit.
  • a gate driver Gate Driver On Array, GOA
  • the GOA circuit refers to a scan line driving circuit directly prepared on the array substrate.
  • the GOA circuit includes multi-level GOA units. Each GOA unit outputs a scanning signal to a scanning line and provides an opening signal to the next-level GOA unit, so that the GOA circuit as a whole can achieve the purpose of turning on the scanning line line by line.
  • GOA technology not only saves costs, but also eliminates the binding process in the gate direction, which is extremely beneficial for improvement and improves the integration of the display panel.
  • Each stage of the GOA circuit in the existing GOA circuit needs to access a clock signal, a first low-frequency control signal, and a second low-frequency control signal.
  • the clock signal, the first low-frequency control signal, and the second low-frequency control signal are all pulse signals.
  • the frequencies of a low-frequency control signal and the second low-frequency control signal are lower than the clock signal, and the phases of the first low-frequency control signal and the second low-frequency control signal are opposite.
  • the clock signal is used to generate a corresponding scanning signal, and the first low-frequency control signal and the second low-frequency control signal are used to control the node voltage in the GOA unit to maintain the power supply low voltage. Referring to FIG.
  • an existing liquid crystal display device in order to transmit a clock signal, a first low-frequency control signal, and a second low-frequency control signal, an existing liquid crystal display device includes two sets of low-frequency control signal bus groups 200 and a plurality of clock signal buses (not shown) on a substrate 100.
  • each low-frequency control signal bus group 200 includes a first low-frequency control signal bus 210 and a second low-frequency control signal bus 220.
  • One end of the first low-frequency control signal bus 210 is connected to the first low-frequency control signal LC1.
  • One end of the second low-frequency control signal bus 220 is connected to the second low-frequency control signal LC2, and one end of the clock signal bus is connected to a clock signal.
  • the current common practice is to set an overcurrent protection module 410 on the C Board 400 of the display device.
  • the second low-frequency control signal bus 220 and the clock signal bus are electrically connected.
  • the overcurrent protection and protection module 410 detects any of the low-frequency control signal bus 210, the second low-frequency control signal bus 220, and the clock signal bus, When the current reaches the preset protection current, overcurrent protection is activated to avoid causing an accident. In actual product design, the accuracy of the protection current selection is very high. If the protection current is set too large, it will easily cause the temperature of the display device to be too high, the overcurrent protection effect is poor, and the protection current is set too small. During the operation of the device, the device will generate a certain coupling effect, and it is easy to trigger overcurrent protection by mistake.
  • the general protection current setting method is: short-circuit two signal buses transmitting different signals at different positions of the display device, and when the display device reaches a predetermined maximum temperature, detect the current on the two signal buses as the protection current at this time . Because the first low-frequency control signal and the second low-frequency control signal are low-frequency reversed signals to each other, under the same current flow, the short-circuit of the first low-frequency signal control signal bus 210 and the second low-frequency control signal bus 220 is short compared to two. The duration of the short-circuit heating of the clock signal bus is longer and the heat generation is greater, which makes the temperature of the display device higher.
  • the temperature of the short-circuit current of the first low-frequency control signal bus and the second low-frequency control signal line is 45 mA, and the temperature will reach 45 ° C, and the temperature of the two clock signal buses will reach 45 ° C when the short-circuit current reaches 60 mA.
  • the preset maximum temperature is 45 ° C
  • 60mA is used as the protection current
  • the first low-frequency control signal bus and the second low-frequency control signal bus are short-circuited
  • the first low-frequency control signal bus and the second low-frequency control signal bus are Overcurrent protection will only be triggered when the current is 60mA, but at this time the heat generated by the short circuit between the first low-frequency control signal bus and the second low-frequency control signal bus causes the display device temperature to exceed 45 ° C, which has a greater impact on the product, but If the protection current is set to 45mA, the overcurrent protection may be triggered by mistake. How to increase the protection current as much as possible without affecting the temperature of the device has become an urgent problem.
  • the object of the present invention is to provide a display device, which can make the current on the low-frequency control signal bus always smaller than a preset protection current, which is beneficial to increase the protection current without affecting the temperature of the display device.
  • the present invention provides a display device including at least one bus group, at least one resistance unit, and an overcurrent protection module;
  • a resistor unit corresponds to a bus group; each bus group includes a first low-frequency control signal bus and a second low-frequency control signal bus; each resistor unit includes a first resistor and a second resistor; one end of the first resistor is connected The other end of the first low-frequency control signal is electrically connected to one end of the first low-frequency control signal bus corresponding to the bus group, one end of the second resistor is connected to the second low-frequency control signal, and the other end is electrically connected to the second corresponding to the bus group.
  • the first low frequency control signal and the second low frequency control signal are both pulse signals and have opposite phases; the sum of the resistances of the first resistance and the second resistance of each resistance unit is greater than the high potential and the low potential of the first low frequency control signal. The ratio of the difference to the preset protection current;
  • the overcurrent protection module is electrically connected to one end of the first low-frequency control signal bus and one end of the second low-frequency control signal bus of each bus group, and is configured to detect the first low-frequency control signal bus and Overcurrent protection is triggered when the current of the second low-frequency control signal bus is greater than a preset protection current;
  • the display device further includes multiple clock signal buses, and the overcurrent protection module is electrically connected to the multiple clock signal buses;
  • the first low-frequency control signal and the second low-frequency control signal have a duty ratio of 0.5 and a period of 3.34s.
  • the overcurrent protection module is electrically connected to one end of each first resistor and each second resistor so as to electrically connect one end of the first low-frequency control signal bus and the second low-frequency of each bus group. One end of the control signal bus.
  • the sum of the resistances of the first resistance and the second resistance of each resistance unit is greater than 1000 ⁇ .
  • the display device further includes a substrate, and the bus group is disposed on the substrate.
  • the display device includes at least a first circuit board bound to a substrate and a second circuit board bound to each first circuit board; a first circuit board corresponds to a resistance unit;
  • the overcurrent protection module is disposed on a second circuit board.
  • each resistance unit is disposed on a second circuit board; the other end of the first resistance of each resistance unit passes through the corresponding first circuit board and one end of the first low-frequency control signal bus of the corresponding bus group. Electrical connection; the other end of the second resistor of each resistance unit is electrically connected to one end of the second low-frequency control signal bus of the corresponding bus group via the corresponding first circuit board.
  • each resistance unit is disposed on a corresponding first circuit board.
  • the number of the bus groups is two.
  • the overcurrent protection module triggers overcurrent protection when it detects that the current of any one of the multiple clock signal buses is greater than a preset protection current.
  • the first low-frequency control signal and the second low-frequency control signal have a high potential of 28V and a low potential of -8V.
  • the present invention provides a display device including at least one bus group, at least one resistance unit, and an overcurrent protection module;
  • a resistor unit corresponds to a bus group; each bus group includes a first low-frequency control signal bus and a second low-frequency control signal bus; each resistor unit includes a first resistor and a second resistor; one end of the first resistor is connected The other end of the first low-frequency control signal is electrically connected to one end of the first low-frequency control signal bus corresponding to the bus group, one end of the second resistor is connected to the second low-frequency control signal, and the other end is electrically connected to the second corresponding to the bus group.
  • the first low frequency control signal and the second low frequency control signal are both pulse signals and have opposite phases; the sum of the resistances of the first resistance and the second resistance of each resistance unit is greater than the high potential and the low potential of the first low frequency control signal. The ratio of the difference to the preset protection current;
  • the overcurrent protection module is electrically connected to one end of the first low-frequency control signal bus and one end of the second low-frequency control signal bus of each bus group, and is configured to detect the first low-frequency control signal bus and When the current of the second low-frequency control signal bus is greater than a preset protection current, overcurrent protection is triggered.
  • the overcurrent protection module is electrically connected to one end of each first resistor and each second resistor so as to electrically connect one end of the first low-frequency control signal bus and the second low-frequency of each bus group. One end of the control signal bus.
  • the sum of the resistances of the first resistance and the second resistance of each resistance unit is greater than 1000 ⁇ .
  • the display device further includes a substrate, and the bus group is disposed on the substrate.
  • the display device includes at least a first circuit board bound to a substrate and a second circuit board bound to each first circuit board; a first circuit board corresponds to a resistance unit;
  • the overcurrent protection module is disposed on a second circuit board.
  • each resistance unit is disposed on a second circuit board; the other end of the first resistance of each resistance unit passes through the corresponding first circuit board and one end of the first low-frequency control signal bus of the corresponding bus group. Electrical connection; the other end of the second resistor of each resistance unit is electrically connected to one end of the second low-frequency control signal bus of the corresponding bus group via the corresponding first circuit board.
  • each resistance unit is disposed on a corresponding first circuit board.
  • the number of the bus groups is two.
  • the display device further includes a plurality of clock signal buses
  • the overcurrent protection module is electrically connected to multiple clock signal buses; the overcurrent protection module triggers overcurrent protection when it detects that the current of any one of the multiple clock signal buses is greater than a preset protection current.
  • the first low-frequency control signal and the second low-frequency control signal have a duty cycle of 0.5 and a period of 3.34s; the high potentials of the first low-frequency control signal and the second low-frequency control signal are both high. It is 28V and the low potential is -8V.
  • the display device of the present invention includes a bus group, a resistance unit, and an overcurrent protection module.
  • One end of a first resistance of the resistance unit is connected to a first low-frequency control signal, and the other end is electrically connected to one end corresponding to the first low-frequency control signal bus.
  • One end of the resistor is connected to the second low-frequency control signal, and the other end is electrically connected to one end of the second low-frequency control signal bus.
  • the sum of the resistances of the first and second resistors of each resistance unit is greater than
  • the ratio of the difference between the potential and the low potential to a preset protection current makes the currents of the first low-frequency control signal bus and the second low-frequency control signal bus no matter where the short circuit occurs in the first low-frequency control signal bus and the second low-frequency control signal bus. Both will be smaller than the protection current, which is beneficial to setting the protection current value higher without affecting the temperature of the display device.
  • FIG. 1 is a schematic structural diagram of a conventional display device.
  • FIG. 2 is a schematic structural diagram of a display device according to a preferred embodiment of the present invention.
  • FIG. 3 is a waveform diagram of a first low-frequency control signal and a second low-frequency control signal of a display device of the present invention.
  • the present invention provides a display device including at least one bus group 10, at least one resistance unit 20, and an overcurrent protection module 30.
  • a resistance unit 20 corresponds to a bus group 10.
  • Each bus group 10 includes a first low-frequency control signal bus 11 and a second low-frequency control signal bus 12.
  • Each resistor unit 20 includes a first resistor R1 and a second resistor R2.
  • One end of the first resistor R1 is connected to the first low frequency control signal LC1, the other end is electrically connected to one end of the first low frequency control signal bus 11 corresponding to the bus group 10, and one end of the second resistor R2 is connected to the second low frequency
  • the other end of the control signal LC2 is electrically connected to one end of the second low-frequency control signal bus 12 corresponding to the bus group 10.
  • the first low-frequency control signal LC1 and the second low-frequency control signal LC2 are both pulse signals and have opposite phases.
  • the sum of the resistances of the first resistance R1 and the second resistance R2 of each resistance unit 20 is greater than the ratio of the difference between the high potential and the low potential of the first low-frequency control signal LC1 to a preset protection current.
  • the overcurrent protection module 30 is electrically connected to the first low-frequency control signal bus 11 and the second low-frequency control signal bus 12 of each bus group 10, and is configured to detect the first low-frequency control signal bus of any bus group 10 When the current of 11 and the second low-frequency control signal bus 12 is greater than a preset protection current, overcurrent protection is triggered, and the display device is controlled to stop working.
  • the overcurrent protection module 30 is electrically connected to one end of each of the first resistors R1 and each of the second resistors R2 so as to be electrically connected to the first of each bus group 10.
  • the overcurrent protection module 30 may also be directly electrically connected to one end of the first low-frequency control signal bus 11 and one end of the second low-frequency control signal bus 12 of each bus group 10. This will not affect the realization of the present invention.
  • the number of the bus groups 10 is two, and the number of the resistance units 20 is also two.
  • the display device may also include only one bus group 10 and one resistance unit 20.
  • the sum of the resistances of the first resistance R1 and the second resistance R2 of each resistance unit 20 is greater than 1000 ⁇ .
  • the display device further includes a substrate 40 on which the bus group 10 is disposed.
  • the display device further includes at least a first circuit board 50 bound to the substrate 40 and a second circuit board 60 bound to each of the first circuit boards 50.
  • a first circuit board 50 corresponds to a resistance unit 20.
  • the display device shown includes two first circuit boards 50.
  • the second circuit board 60 is the C-board of the display device, and the first circuit board 50 is the X-board of the display device.
  • the overcurrent protection module 30 is disposed on the second circuit board 60, that is, the C board.
  • each resistance unit 20 is disposed on the second circuit board 60, that is, the C board.
  • the other end of the first resistor R1 of each resistance unit 20 is electrically connected to one end of the first low-frequency control signal bus 11 of the corresponding bus group 10 via the corresponding first circuit board 50.
  • the other end of the second resistor R2 of each resistance unit 20 is electrically connected to one end of the second low-frequency control signal bus 12 of the corresponding bus group 10 via the corresponding first circuit board 50.
  • each resistance unit 20 may also be set on the corresponding first circuit board 50, which does not affect the implementation of the present invention.
  • the display device further includes a plurality of clock signal buses 70.
  • the multiple clock signal buses 70 are used to access clock signals.
  • the over-current protection module 30 is electrically connected to a plurality of clock signal buses 70. The overcurrent protection module 30 triggers overcurrent protection when it detects that the current of any one of the multiple clock signal buses 70 is greater than a preset protection current.
  • the plurality of clock signals includes a first clock signal CK1, a second clock signal CK2, a third clock signal CK3, and a fourth clock signal CK4,
  • the plurality of clock signal buses 70 are divided into two groups.
  • Each group of clock signal buses 70 includes four clock signal buses 70.
  • the four clock signal buses 70 of each group of clock signal buses 70 are respectively connected to the first clock signal CK1, the first Two clock signals CK2, a third clock signal CK3, and a fourth clock signal CK4.
  • more clock signals may be provided, for example, eight clock signals, and the number of clock signal buses 70 may be correspondingly increased, which will not affect the implementation of the present invention.
  • the duty ratios of the first low-frequency control signal LC1 and the second low-frequency control signal LC2 are both 0.5 and the period is 3.34s; and the high potentials of the first low-frequency control signal LC1 and the second low-frequency control signal LC2 are high. Both are 28V and the low potential is -8V.
  • the first low-frequency control signal bus 11 and the second low-frequency control signal bus 12 of a bus group 10 are short-circuited at a certain position, the first low-frequency control signal bus 11 and the first The short circuit between the two low-frequency control signal buses 12 forms a loop with the first resistor R1 and the second resistor R2.
  • the protection current is appropriately increased without affecting the temperature of the display device.
  • the first low-frequency control signal LC1 and the second low-frequency control signal LC2 are input to the first low-frequency control signal bus 11 and the second low-frequency control signal bus 12 through the first resistor R1 and the second resistor R2, the first low-frequency control signal is affected.
  • the display device of the present invention includes a bus group, a resistance unit, and an overcurrent protection module.
  • One end of the first resistance of the resistance unit is connected to the first low-frequency control signal, and the other end is electrically connected to the first low-frequency control signal bus.
  • One end, one end of the second resistor is connected to the second low-frequency control signal, and the other end is electrically connected to one end corresponding to the second low-frequency control signal bus.
  • the sum of the resistances of the first resistance and the second resistance of each resistance unit is greater than the first resistance.
  • the ratio of the difference between the high potential and the low potential of the low-frequency control signal to the preset protection current makes the first low-frequency control signal bus and the second low-frequency control signal bus short-circuited no matter where they are.
  • the current of the control signal bus will be less than the protection current, which is conducive to setting the protection current value higher without affecting the temperature of the display device.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

A display device, comprising a bus assembly (10), a resistor unit (20) and an overcurrent protection module (30); an end of a first resistor (R1) of the resistor unit (20) accesses a first low frequency control signal (LC1), and the other end is electrically connected to an end of a corresponding first low frequency control signal bus (11); an end of a second resistor (R2) accesses a second low frequency control signal (LC2), and the other end is electrically connected to an end of a corresponding second low frequency control signal bus (12), the sum of the resistors for the first resistor (R1) and second resistor (R2) of each resistor unit being greater than the ratio between the difference between a high electric potential and low electric potential of the first low frequency control signal (LC1) and a preset protection current.

Description

显示装置Display device 技术领域Technical field
本发明涉及显示技术领域，尤其涉及一种显示装置。The present invention relates to the field of display technology, and in particular, to a display device.
背景技术Background technique
在显示技术领域，平板显示装置，如液晶显示器（Liquid Crystal Display，LCD）和有机电致发光显示器（Organic Light Emitting Display，OLED）因其具有轻、薄、低功耗、高亮度以及高画质等优点，在平板显示技术领域占据重要的地位。显示装置至少包括设置有像素阵列的阵列基板，一般地，阵列基板的显示区域设置有扫描线、数据线以及位于像素区域的像素电极等，还包括位于***区域或电路板上的栅极驱动电路和源极驱动电路。In the field of display technology, flat panel display devices, such as liquid crystal displays (LCDs) and organic electroluminescent displays (Organic Light Emitting Display (OLED) occupies an important position in the field of flat panel display technology due to its advantages such as lightness, thinness, low power consumption, high brightness, and high image quality. The display device includes at least an array substrate provided with a pixel array. Generally, a display area of the array substrate is provided with scan lines, data lines, and pixel electrodes located in the pixel area. The display device also includes a gate driving circuit located in a peripheral area or a circuit board. And source drive circuit.
目前一般采用在阵列基板上制备栅极驱动（Gate Driver On Array，GOA）技术制备显示基板，GOA电路是指直接制备在阵列基板上的扫描线驱动电路。GOA电路包括多级GOA单元，每个GOA单元向一条扫描线输出扫描信号，并为下一级GOA单元提供开启信号，从而GOA电路整体上可以实现扫描线逐行开启的目的。GOA技术相比于传统工艺，不仅节省了成本，同时由于可以省去栅极方向上的绑定工艺，对提升产生极为有利，并提高了显示面板的集成度。现有的GOA电路中每一级GOA单元均需要接入时钟信号、第一低频控制信号、第二低频控制信号，时钟信号、第一低频控制信号、第二低频控制信号均为脉冲信号，第一低频控制信号及第二低频控制信号的频率要低于时钟信号，且第一低频控制信号与第二低频控制信号的相位相反。时钟信号用于产生对应的扫描信号，第一低频控制信号及第二低频控制信号用于控制GOA单元中的节点电压维持在电源低电压。请参阅图1，为传输时钟信号、第一低频控制信号、第二低频控制信号，现有的液晶显示装置在衬底100上设置两组低频控制信号总线组200以及多条时钟信号总线（未图示），每一低频控制信号总线组200均包括一条第一低频控制信号总线210及一条第二低频控制信号总线220，第一低频控制信号总线210的一端接入第一低频控制信号LC1，第二低频控制信号总线220的一端接入第二低频控制信号LC2，时钟信号总线的一端接入时钟信号。实际工作过程中，传输不同信号的信号总线之间的压差较大，若有短路（Short）则容易产生大电流，造成线路温度升高，烧坏显示装置，对产品造成较大影响，为避免此类事故发生，请参阅图1，目前的通常做法是在显示装置的C板（C Board）400上设置过电流保护模块410，该过电流保护模块410与每一第一低频控制信号总线210、第二低频控制信号总线220、时钟信号总线均电性连接，当过电流保护保护模块410侦测到低频控制信号总线210、第二低频控制信号总线220、时钟信号总线中的任一个的电流达到预设的保护电流时启动过电流保护，避免造成事故。实际的产品设计中，保护电流的选取的准确性有很高的要求，保护电流设定过大，容易导致显示装置温度过高，过电流保护效果较差，保护电流设定过小，由于显示装置在运行过程中器件会产生一定的耦合作用，容易误触发过电流保护。一般保护电流的设定方法是：在显示装置的不同位置短路两条传输不同信号的信号总线，在显示装置达到预定的最高温度时，侦测此时该两条信号总线上的电流作为保护电流。由于第一低频控制信号与第二低频控制信号互为低频反相信号，因此在流过电流相同的情况下，第一低频信控制号总线210与第二低频控制信号总线220短路相比于两条时钟信号总线短路发热的持续时间更长，发热量更大，使得显示装置的温度更高。例如在实验中，第一低频控制信号总线与第二低频控制信号线短路的电流为45mA时温度会达到45℃，而两条时钟信号总线短路的电流要达到60mA时温度才会达到45℃，如果预设的最大温度为45℃，此时如果将60mA作为保护电流，那么当第一低频控制信号总线与第二低频控制信号总线短路使得第一低频控制信号总线与第二低频控制信号总线上的电流为60mA时才会触发过电流保护，但此时第一低频控制信号总线与第二低频控制信号总线短路产生的热量使显示装置温度早已超过45℃，对产品造成较大的影响，但若将保护电流设置为45mA，则又有可能导致过电流保护误触发。如何在不影响装置温度的前提下尽可能拉高保护电流成为目前亟需解决的问题。At present, a gate driver (Gate Driver On Array, GOA) technology is generally used to prepare a display substrate. The GOA circuit refers to a scan line driving circuit directly prepared on the array substrate. The GOA circuit includes multi-level GOA units. Each GOA unit outputs a scanning signal to a scanning line and provides an opening signal to the next-level GOA unit, so that the GOA circuit as a whole can achieve the purpose of turning on the scanning line line by line. Compared with the traditional process, GOA technology not only saves costs, but also eliminates the binding process in the gate direction, which is extremely beneficial for improvement and improves the integration of the display panel. Each stage of the GOA circuit in the existing GOA circuit needs to access a clock signal, a first low-frequency control signal, and a second low-frequency control signal. The clock signal, the first low-frequency control signal, and the second low-frequency control signal are all pulse signals. The frequencies of a low-frequency control signal and the second low-frequency control signal are lower than the clock signal, and the phases of the first low-frequency control signal and the second low-frequency control signal are opposite. The clock signal is used to generate a corresponding scanning signal, and the first low-frequency control signal and the second low-frequency control signal are used to control the node voltage in the GOA unit to maintain the power supply low voltage. Referring to FIG. 1, in order to transmit a clock signal, a first low-frequency control signal, and a second low-frequency control signal, an existing liquid crystal display device includes two sets of low-frequency control signal bus groups 200 and a plurality of clock signal buses (not shown) on a substrate 100. (Illustrated), each low-frequency control signal bus group 200 includes a first low-frequency control signal bus 210 and a second low-frequency control signal bus 220. One end of the first low-frequency control signal bus 210 is connected to the first low-frequency control signal LC1. One end of the second low-frequency control signal bus 220 is connected to the second low-frequency control signal LC2, and one end of the clock signal bus is connected to a clock signal. In the actual working process, the voltage difference between the signal buses transmitting different signals is large. If there is a short circuit, a large current is easily generated, which will cause the line temperature to rise, burn the display device, and cause a large impact on the product. To avoid such accidents, please refer to FIG. 1. The current common practice is to set an overcurrent protection module 410 on the C Board 400 of the display device. The overcurrent protection module 410 and each first low-frequency control signal bus 210. The second low-frequency control signal bus 220 and the clock signal bus are electrically connected. When the overcurrent protection and protection module 410 detects any of the low-frequency control signal bus 210, the second low-frequency control signal bus 220, and the clock signal bus, When the current reaches the preset protection current, overcurrent protection is activated to avoid causing an accident. In actual product design, the accuracy of the protection current selection is very high. If the protection current is set too large, it will easily cause the temperature of the display device to be too high, the overcurrent protection effect is poor, and the protection current is set too small. During the operation of the device, the device will generate a certain coupling effect, and it is easy to trigger overcurrent protection by mistake. The general protection current setting method is: short-circuit two signal buses transmitting different signals at different positions of the display device, and when the display device reaches a predetermined maximum temperature, detect the current on the two signal buses as the protection current at this time . Because the first low-frequency control signal and the second low-frequency control signal are low-frequency reversed signals to each other, under the same current flow, the short-circuit of the first low-frequency signal control signal bus 210 and the second low-frequency control signal bus 220 is short compared to two. The duration of the short-circuit heating of the clock signal bus is longer and the heat generation is greater, which makes the temperature of the display device higher. For example, in the experiment, the temperature of the short-circuit current of the first low-frequency control signal bus and the second low-frequency control signal line is 45 mA, and the temperature will reach 45 ° C, and the temperature of the two clock signal buses will reach 45 ° C when the short-circuit current reaches 60 mA. If the preset maximum temperature is 45 ° C, if 60mA is used as the protection current, then when the first low-frequency control signal bus and the second low-frequency control signal bus are short-circuited, the first low-frequency control signal bus and the second low-frequency control signal bus are Overcurrent protection will only be triggered when the current is 60mA, but at this time the heat generated by the short circuit between the first low-frequency control signal bus and the second low-frequency control signal bus causes the display device temperature to exceed 45 ° C, which has a greater impact on the product, but If the protection current is set to 45mA, the overcurrent protection may be triggered by mistake. How to increase the protection current as much as possible without affecting the temperature of the device has become an urgent problem.
技术问题technical problem
本发明的目的在于提供一种显示装置，能够使低频控制信号总线上的电流始终小于预设的保护电流，有利于在不影响显示装置温度的前提下提升保护电流。The object of the present invention is to provide a display device, which can make the current on the low-frequency control signal bus always smaller than a preset protection current, which is beneficial to increase the protection current without affecting the temperature of the display device.
技术解决方案Technical solutions
为实现上述目的，本发明提供一种显示装置，包括至少一个总线组、至少一个电阻单元以及过电流保护模块；To achieve the above object, the present invention provides a display device including at least one bus group, at least one resistance unit, and an overcurrent protection module;
一电阻单元与一总线组对应；每一总线组包括第一低频控制信号总线及第二低频控制信号总线；每一电阻单元包括第一电阻及第二电阻；所述第一电阻的一端接入第一低频控制信号，另一端电性连接对应总线组的第一低频控制信号总线的一端，所述第二电阻的一端接入第二低频控制信号，另一端电性连接对应总线组的第二低频控制信号总线的一端；A resistor unit corresponds to a bus group; each bus group includes a first low-frequency control signal bus and a second low-frequency control signal bus; each resistor unit includes a first resistor and a second resistor; one end of the first resistor is connected The other end of the first low-frequency control signal is electrically connected to one end of the first low-frequency control signal bus corresponding to the bus group, one end of the second resistor is connected to the second low-frequency control signal, and the other end is electrically connected to the second corresponding to the bus group. One end of the low-frequency control signal bus;
所述第一低频控制信号及第二低频控制信号均为脉冲信号且相位相反；每一电阻单元的第一电阻及第二电阻的电阻之和大于第一低频控制信号的高电位和低电位之差与预设的保护电流的比值；The first low frequency control signal and the second low frequency control signal are both pulse signals and have opposite phases; the sum of the resistances of the first resistance and the second resistance of each resistance unit is greater than the high potential and the low potential of the first low frequency control signal. The ratio of the difference to the preset protection current;
所述过电流保护模块电性连接每一总线组的第一低频控制信号总线的一端及第二低频控制信号总线的一端，用于在侦测到任意一总线组的第一低频控制信号总线及第二低频控制信号总线的电流大于预设的保护电流时触发过电流保护；The overcurrent protection module is electrically connected to one end of the first low-frequency control signal bus and one end of the second low-frequency control signal bus of each bus group, and is configured to detect the first low-frequency control signal bus and Overcurrent protection is triggered when the current of the second low-frequency control signal bus is greater than a preset protection current;
所述显示装置还包括多条时钟信号总线，所述过电流保护模块电性连接多条时钟信号总线；The display device further includes multiple clock signal buses, and the overcurrent protection module is electrically connected to the multiple clock signal buses;
所述第一低频控制信号及第二低频控制信号的占空比均为0.5，周期均为3.34s。The first low-frequency control signal and the second low-frequency control signal have a duty ratio of 0.5 and a period of 3.34s.
在一实施例中，所述过电流保护模块与每一第一电阻及每一第二电阻的一端电性连接从而电性连接每一总线组的第一低频控制信号总线的一端及第二低频控制信号总线的一端。In one embodiment, the overcurrent protection module is electrically connected to one end of each first resistor and each second resistor so as to electrically connect one end of the first low-frequency control signal bus and the second low-frequency of each bus group. One end of the control signal bus.
在一实施例中，每一电阻单元的第一电阻及第二电阻的电阻之和大于1000Ω。In one embodiment, the sum of the resistances of the first resistance and the second resistance of each resistance unit is greater than 1000Ω.
在一实施例中，所述显示装置还包括衬底，所述总线组设置在所述衬底上。In an embodiment, the display device further includes a substrate, and the bus group is disposed on the substrate.
在一实施例中，所述显示装置包括与衬底绑定的至少第一电路板及与每一第一电路板均绑定的第二电路板；一第一电路板与一电阻单元对应；In one embodiment, the display device includes at least a first circuit board bound to a substrate and a second circuit board bound to each first circuit board; a first circuit board corresponds to a resistance unit;
所述过电流保护模块设于第二电路板上。The overcurrent protection module is disposed on a second circuit board.
在一实施例中，每一电阻单元均设于第二电路板上；每一电阻单元的第一电阻的另一端经对应的第一电路板与对应总线组的第一低频控制信号总线的一端电性连接；每一电阻单元的第二电阻的另一端经对应的第一电路板与对应总线组的第二低频控制信号总线的一端电性连接。In one embodiment, each resistance unit is disposed on a second circuit board; the other end of the first resistance of each resistance unit passes through the corresponding first circuit board and one end of the first low-frequency control signal bus of the corresponding bus group. Electrical connection; the other end of the second resistor of each resistance unit is electrically connected to one end of the second low-frequency control signal bus of the corresponding bus group via the corresponding first circuit board.
在一实施例中，每一电阻单元均设于对应的第一电路板上。In one embodiment, each resistance unit is disposed on a corresponding first circuit board.
在一实施例中，所述总线组的数量为两个。In one embodiment, the number of the bus groups is two.
在一实施例中，所述过电流保护模块在侦测到多条时钟信号总线中任意一条的电流大于预设的保护电流时触发过电流保护。In one embodiment, the overcurrent protection module triggers overcurrent protection when it detects that the current of any one of the multiple clock signal buses is greater than a preset protection current.
在一实施例中，所述第一低频控制信号及第二低频控制信号的高电位均为28V，低电位均为-8V。In one embodiment, the first low-frequency control signal and the second low-frequency control signal have a high potential of 28V and a low potential of -8V.
为实现上述目的，本发明提供一种显示装置，包括至少一个总线组、至少一个电阻单元以及过电流保护模块；To achieve the above object, the present invention provides a display device including at least one bus group, at least one resistance unit, and an overcurrent protection module;
一电阻单元与一总线组对应；每一总线组包括第一低频控制信号总线及第二低频控制信号总线；每一电阻单元包括第一电阻及第二电阻；所述第一电阻的一端接入第一低频控制信号，另一端电性连接对应总线组的第一低频控制信号总线的一端，所述第二电阻的一端接入第二低频控制信号，另一端电性连接对应总线组的第二低频控制信号总线的一端；A resistor unit corresponds to a bus group; each bus group includes a first low-frequency control signal bus and a second low-frequency control signal bus; each resistor unit includes a first resistor and a second resistor; one end of the first resistor is connected The other end of the first low-frequency control signal is electrically connected to one end of the first low-frequency control signal bus corresponding to the bus group, one end of the second resistor is connected to the second low-frequency control signal, and the other end is electrically connected to the second corresponding to the bus group. One end of the low-frequency control signal bus;
所述第一低频控制信号及第二低频控制信号均为脉冲信号且相位相反；每一电阻单元的第一电阻及第二电阻的电阻之和大于第一低频控制信号的高电位和低电位之差与预设的保护电流的比值；The first low frequency control signal and the second low frequency control signal are both pulse signals and have opposite phases; the sum of the resistances of the first resistance and the second resistance of each resistance unit is greater than the high potential and the low potential of the first low frequency control signal. The ratio of the difference to the preset protection current;
所述过电流保护模块电性连接每一总线组的第一低频控制信号总线的一端及第二低频控制信号总线的一端，用于在侦测到任意一总线组的第一低频控制信号总线及第二低频控制信号总线的电流大于预设的保护电流时触发过电流保护。The overcurrent protection module is electrically connected to one end of the first low-frequency control signal bus and one end of the second low-frequency control signal bus of each bus group, and is configured to detect the first low-frequency control signal bus and When the current of the second low-frequency control signal bus is greater than a preset protection current, overcurrent protection is triggered.
在一实施例中，所述过电流保护模块与每一第一电阻及每一第二电阻的一端电性连接从而电性连接每一总线组的第一低频控制信号总线的一端及第二低频控制信号总线的一端。In one embodiment, the overcurrent protection module is electrically connected to one end of each first resistor and each second resistor so as to electrically connect one end of the first low-frequency control signal bus and the second low-frequency of each bus group. One end of the control signal bus.
在一实施例中，每一电阻单元的第一电阻及第二电阻的电阻之和大于1000Ω。In one embodiment, the sum of the resistances of the first resistance and the second resistance of each resistance unit is greater than 1000Ω.
在一实施例中，所述显示装置还包括衬底，所述总线组设置在所述衬底上。In an embodiment, the display device further includes a substrate, and the bus group is disposed on the substrate.
在一实施例中，所述显示装置包括与衬底绑定的至少第一电路板及与每一第一电路板均绑定的第二电路板；一第一电路板与一电阻单元对应；In one embodiment, the display device includes at least a first circuit board bound to a substrate and a second circuit board bound to each first circuit board; a first circuit board corresponds to a resistance unit;
所述过电流保护模块设于第二电路板上。The overcurrent protection module is disposed on a second circuit board.
在一实施例中，每一电阻单元均设于第二电路板上；每一电阻单元的第一电阻的另一端经对应的第一电路板与对应总线组的第一低频控制信号总线的一端电性连接；每一电阻单元的第二电阻的另一端经对应的第一电路板与对应总线组的第二低频控制信号总线的一端电性连接。In one embodiment, each resistance unit is disposed on a second circuit board; the other end of the first resistance of each resistance unit passes through the corresponding first circuit board and one end of the first low-frequency control signal bus of the corresponding bus group. Electrical connection; the other end of the second resistor of each resistance unit is electrically connected to one end of the second low-frequency control signal bus of the corresponding bus group via the corresponding first circuit board.
在一实施例中，每一电阻单元均设于对应的第一电路板上。In one embodiment, each resistance unit is disposed on a corresponding first circuit board.
在一实施例中，所述总线组的数量为两个。In one embodiment, the number of the bus groups is two.
在一实施例中，所述显示装置还包括多条时钟信号总线；In an embodiment, the display device further includes a plurality of clock signal buses;
所述过电流保护模块电性连接多条时钟信号总线；所述过电流保护模块在侦测到多条时钟信号总线中任意一条的电流大于预设的保护电流时触发过电流保护。The overcurrent protection module is electrically connected to multiple clock signal buses; the overcurrent protection module triggers overcurrent protection when it detects that the current of any one of the multiple clock signal buses is greater than a preset protection current.
在一实施例中，所述第一低频控制信号及第二低频控制信号的占空比均为0.5，周期均为3.34s；所述第一低频控制信号及第二低频控制信号的高电位均为28V，低电位均为-8V。In one embodiment, the first low-frequency control signal and the second low-frequency control signal have a duty cycle of 0.5 and a period of 3.34s; the high potentials of the first low-frequency control signal and the second low-frequency control signal are both high. It is 28V and the low potential is -8V.
有益效果Beneficial effect
本发明的显示装置包括总线组、电阻单元以及过电流保护模块，电阻单元的第一电阻的一端接入第一低频控制信号，另一端电性连接对应第一低频控制信号总线的一端，第二电阻的一端接入第二低频控制信号，另一端电性连接对应第二低频控制信号总线的一端，每一电阻单元的第一电阻及第二电阻的电阻之和大于第一低频控制信号的高电位和低电位之差与预设的保护电流的比值，使得第一低频控制信号总线及第二低频控制信号总线不论在何位置短路，第一低频控制信号总线及第二低频控制信号总线的电流均会小于保护电流，从而有利于在不影响显示装置温度的前提下将保护电流值设置得更高。The display device of the present invention includes a bus group, a resistance unit, and an overcurrent protection module. One end of a first resistance of the resistance unit is connected to a first low-frequency control signal, and the other end is electrically connected to one end corresponding to the first low-frequency control signal bus. One end of the resistor is connected to the second low-frequency control signal, and the other end is electrically connected to one end of the second low-frequency control signal bus. The sum of the resistances of the first and second resistors of each resistance unit is greater than The ratio of the difference between the potential and the low potential to a preset protection current makes the currents of the first low-frequency control signal bus and the second low-frequency control signal bus no matter where the short circuit occurs in the first low-frequency control signal bus and the second low-frequency control signal bus. Both will be smaller than the protection current, which is beneficial to setting the protection current value higher without affecting the temperature of the display device.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1为现有的一种显示装置的结构示意图。FIG. 1 is a schematic structural diagram of a conventional display device.
图2为本发明的显示装置的一优选实施例的结构示意图。FIG. 2 is a schematic structural diagram of a display device according to a preferred embodiment of the present invention.
图3为本发明的显示装置的第一低频控制信号及第二低频控制信号的波形图。3 is a waveform diagram of a first low-frequency control signal and a second low-frequency control signal of a display device of the present invention.
本发明的实施方式Embodiments of the invention
为更进一步阐述本发明所采取的技术手段及其效果，以下结合本发明的优选实施例及其附图进行详细描述。In order to further explain the technical means adopted by the present invention and its effects, the following describes in detail with reference to the preferred embodiments of the present invention and the accompanying drawings.
请参阅图2，本发明提供一种显示装置，包括至少一个总线组10、至少一个电阻单元20以及过电流保护模块30。Referring to FIG. 2, the present invention provides a display device including at least one bus group 10, at least one resistance unit 20, and an overcurrent protection module 30.
一电阻单元20与一总线组10对应。每一总线组10包括第一低频控制信号总线11及第二低频控制信号总线12。每一电阻单元20包括第一电阻R1及第二电阻R2。所述第一电阻R1的一端接入第一低频控制信号LC1，另一端电性连接对应总线组10的第一低频控制信号总线11的一端，所述第二电阻R2的一端接入第二低频控制信号LC2，另一端电性连接对应总线组10的第二低频控制信号总线12的一端。A resistance unit 20 corresponds to a bus group 10. Each bus group 10 includes a first low-frequency control signal bus 11 and a second low-frequency control signal bus 12. Each resistor unit 20 includes a first resistor R1 and a second resistor R2. One end of the first resistor R1 is connected to the first low frequency control signal LC1, the other end is electrically connected to one end of the first low frequency control signal bus 11 corresponding to the bus group 10, and one end of the second resistor R2 is connected to the second low frequency The other end of the control signal LC2 is electrically connected to one end of the second low-frequency control signal bus 12 corresponding to the bus group 10.
请参阅图3，所述第一低频控制信号LC1及第二低频控制信号LC2均为脉冲信号且相位相反。每一电阻单元20的第一电阻R1及第二电阻R2的电阻之和大于第一低频控制信号LC1的高电位和低电位之差与预设的保护电流的比值。Referring to FIG. 3, the first low-frequency control signal LC1 and the second low-frequency control signal LC2 are both pulse signals and have opposite phases. The sum of the resistances of the first resistance R1 and the second resistance R2 of each resistance unit 20 is greater than the ratio of the difference between the high potential and the low potential of the first low-frequency control signal LC1 to a preset protection current.
所述过电流保护模块30电性连接每一总线组10的第一低频控制信号总线11及第二低频控制信号总线12，用于在侦测到任意一总线组10的第一低频控制信号总线11及第二低频控制信号总线12的电流大于预设的保护电流时触发过电流保护，控制显示装置停止工作。The overcurrent protection module 30 is electrically connected to the first low-frequency control signal bus 11 and the second low-frequency control signal bus 12 of each bus group 10, and is configured to detect the first low-frequency control signal bus of any bus group 10 When the current of 11 and the second low-frequency control signal bus 12 is greater than a preset protection current, overcurrent protection is triggered, and the display device is controlled to stop working.
具体地，在图2所示的实施例中，所述过电流保护模块30与每一第一电阻R1及每一第二电阻R2的一端电性连接从而电性连接每一总线组10的第一低频控制信号总线11及第二低频控制信号总线12。当然，在本发明的其他实施例中，所述过电流保护模块30也可以直接与每一总线组10的第一低频控制信号总线11的一端及第二低频控制信号总线12的一端电性连接，这均不会影响本发明的实现。Specifically, in the embodiment shown in FIG. 2, the overcurrent protection module 30 is electrically connected to one end of each of the first resistors R1 and each of the second resistors R2 so as to be electrically connected to the first of each bus group 10. A low-frequency control signal bus 11 and a second low-frequency control signal bus 12. Of course, in other embodiments of the present invention, the overcurrent protection module 30 may also be directly electrically connected to one end of the first low-frequency control signal bus 11 and one end of the second low-frequency control signal bus 12 of each bus group 10. This will not affect the realization of the present invention.
具体地，在图2所示的实施例中，所述总线组10的数量为两个，电阻单元20的数量也为两个。当然，为了降低产品成本及结构的复杂程度，也可以使显示装置仅包括一个总线组10以及一个电阻单元20。Specifically, in the embodiment shown in FIG. 2, the number of the bus groups 10 is two, and the number of the resistance units 20 is also two. Of course, in order to reduce the cost of the product and the complexity of the structure, the display device may also include only one bus group 10 and one resistance unit 20.
优选地，每一电阻单元20的第一电阻R1及第二电阻R2的电阻之和大于1000Ω。Preferably, the sum of the resistances of the first resistance R1 and the second resistance R2 of each resistance unit 20 is greater than 1000Ω.
具体地，请参阅图2，所示显示装置还包括衬底40，所述总线组10设置在所述衬底40上。Specifically, referring to FIG. 2, the display device further includes a substrate 40 on which the bus group 10 is disposed.
进一步地，请参阅图2，所示显示装置还包括与衬底40绑定的至少第一电路板50及与每一第一电路板50均绑定的第二电路板60。一第一电路板50与一电阻单元20对应。在图2所示的实施例中，所示显示装置包括两个第一电路板50。该第二电路板60即为显示装置的C板，而第一电路板50即为显示装置的X板（X-board）。所述过电流保护模块30设于第二电路板60上也即C板上。Further, referring to FIG. 2, the display device further includes at least a first circuit board 50 bound to the substrate 40 and a second circuit board 60 bound to each of the first circuit boards 50. A first circuit board 50 corresponds to a resistance unit 20. In the embodiment shown in FIG. 2, the display device shown includes two first circuit boards 50. The second circuit board 60 is the C-board of the display device, and the first circuit board 50 is the X-board of the display device. The overcurrent protection module 30 is disposed on the second circuit board 60, that is, the C board.
具体地，在图2所示的实施例中，每一电阻单元20均设于第二电路板60上也即C板上。每一电阻单元20的第一电阻R1的另一端经对应的第一电路板50与对应总线组10的第一低频控制信号总线11的一端电性连接。每一电阻单元20的第二电阻R2的另一端经对应的第一电路板50与对应总线组10的第二低频控制信号总线12的一端电性连接。当然，在本发明的其他实施例中，还可以设置每一电阻单元20均设于对应的第一电路板50上，这并不会影响本发明的实现。Specifically, in the embodiment shown in FIG. 2, each resistance unit 20 is disposed on the second circuit board 60, that is, the C board. The other end of the first resistor R1 of each resistance unit 20 is electrically connected to one end of the first low-frequency control signal bus 11 of the corresponding bus group 10 via the corresponding first circuit board 50. The other end of the second resistor R2 of each resistance unit 20 is electrically connected to one end of the second low-frequency control signal bus 12 of the corresponding bus group 10 via the corresponding first circuit board 50. Of course, in other embodiments of the present invention, each resistance unit 20 may also be set on the corresponding first circuit board 50, which does not affect the implementation of the present invention.
具体地，请参阅图2，所示显示装置还包括多条时钟信号总线70。所述多条时钟信号总线70用于接入时钟信号。所述过电流保护模块30电性连接多条时钟信号总线70。所述过电流保护模块30在侦测到多条时钟信号总线70中任意一条的电流大于预设的保护电流时触发过电流保护。Specifically, referring to FIG. 2, the display device further includes a plurality of clock signal buses 70. The multiple clock signal buses 70 are used to access clock signals. The over-current protection module 30 is electrically connected to a plurality of clock signal buses 70. The overcurrent protection module 30 triggers overcurrent protection when it detects that the current of any one of the multiple clock signal buses 70 is greater than a preset protection current.
进一步地，在图2所示的实施例中，所述时钟信号多条时钟信号包括第一条时钟信号CK1、第二条时钟信号CK2、第三条时钟信号CK3、第四条时钟信号CK4，多条时钟信号总线70分为两组，每一组时钟信号总线70均包括四条时钟信号总线70，每一组时钟信号总线70的四条时钟信号总线70分别接入第一条时钟信号CK1、第二条时钟信号CK2、第三条时钟信号CK3、第四条时钟信号CK4。当然，在本发明的其他实施例中，还可设置更多条时钟信号，例如8条时钟信号，时钟信号总线70的数量也可以相应增加，这均不会影响本发明的实现。Further, in the embodiment shown in FIG. 2, the plurality of clock signals includes a first clock signal CK1, a second clock signal CK2, a third clock signal CK3, and a fourth clock signal CK4, The plurality of clock signal buses 70 are divided into two groups. Each group of clock signal buses 70 includes four clock signal buses 70. The four clock signal buses 70 of each group of clock signal buses 70 are respectively connected to the first clock signal CK1, the first Two clock signals CK2, a third clock signal CK3, and a fourth clock signal CK4. Of course, in other embodiments of the present invention, more clock signals may be provided, for example, eight clock signals, and the number of clock signal buses 70 may be correspondingly increased, which will not affect the implementation of the present invention.
优选地，所述第一低频控制信号LC1及第二低频控制信号LC2的占空比均为0.5，周期均为3.34s；所述第一低频控制信号LC1及第二低频控制信号LC2的高电位均为28V，低电位均为-8V。Preferably, the duty ratios of the first low-frequency control signal LC1 and the second low-frequency control signal LC2 are both 0.5 and the period is 3.34s; and the high potentials of the first low-frequency control signal LC1 and the second low-frequency control signal LC2 are high. Both are 28V and the low potential is -8V.
需要说明的是，本发明的显示装置中，当一总线组10的第一低频控制信号总线11与第二低频控制信号总线12在某一位置发生短路，该第一低频控制信号总线11与第二低频控制信号总线12短路的部分与第一电阻R1及第二电阻R2之间形成回路，此时流经该回路的电流I=U/(R1+R2+R)，其中，U为第一电阻R1一端与第二电阻R2一端之间的电压差，R为该第一低频控制信号总线11与第二低频控制信号总线12短路部分的电阻，流经该回路电流的最大值即为第一低频控制信号总线11与第二低频控制信号总线12短路部分的电阻为0时回路的电流I=U/(R1+R2)，由于第一低频控制信号LC1与第二低频控制信号LC2反相，因此任意时刻第一电阻R1一端与第二电阻R2一端之间的电压差均为第一低频控制信号LC1的高电位与低电位之差，而本发明通过设置每一电阻单元20的第一电阻R1及第二电阻R2的电阻之和大于第一低频控制信号LC1的高电位和低电位之差与预设的保护电流的比值，使得不论第一低频控制信号总线11与第二低频控制信号总线12在何处短路，流经第一低频控制信号总线11与第二低频控制信号总线12短路的部分与第一电阻R1及第二电阻R2之间形成回路的电流均小于预设的保护电流，从而可以以时钟信号总线70为依据将保护电流适当增加而不会影响显示装置的温度。此外，虽然第一低频控制信号LC1与第二低频控制信号LC2通过第一电阻R1及第二电阻R2输入第一低频控制信号总线11以及第二低频控制信号总线12中会影响第一低频控制信号总线11及第二低频控制信号总线12上电位下降及上升的时间，但由于第一低频控制信号LC1及第二低频控制信号LC2均为低频信号，且一般而言第一低频控制信号LC1及第二低频控制信号LC2均是在显示装置的消隐（Blanking）阶段发生电位切换，消隐阶段处于非显示阶段中，因此并不会对显示造成任何影响。It should be noted that in the display device of the present invention, when the first low-frequency control signal bus 11 and the second low-frequency control signal bus 12 of a bus group 10 are short-circuited at a certain position, the first low-frequency control signal bus 11 and the first The short circuit between the two low-frequency control signal buses 12 forms a loop with the first resistor R1 and the second resistor R2. At this time, the current flowing through the loop I = U / (R1 + R2 + R), where U is the first The voltage difference between one end of the resistor R1 and one end of the second resistor R2, R is the resistance of the short-circuit part of the first low-frequency control signal bus 11 and the second low-frequency control signal bus 12, and the maximum value of the current flowing through the loop is the first The current I = U / (R1 + R2) of the loop when the resistance of the short-circuited portion of the low-frequency control signal bus 11 and the second low-frequency control signal bus 12 is 0, because the first low-frequency control signal LC1 and the second low-frequency control signal LC2 are inverted, Therefore, the voltage difference between one end of the first resistor R1 and one end of the second resistor R2 at any time is the difference between the high potential and the low potential of the first low-frequency control signal LC1, and the present invention sets the first resistance of each resistance unit 20 Resistance of R1 and second resistor R2 The ratio of the difference between the high potential and the low potential of the first low-frequency control signal LC1 to the preset protection current is such that no matter where the first low-frequency control signal bus 11 and the second low-frequency control signal bus 12 are short-circuited, they flow through the first The current forming a loop between the low-frequency control signal bus 11 and the second low-frequency control signal bus 12 and the first resistor R1 and the second resistor R2 is smaller than a preset protection current, so that the clock signal bus 70 can be used as a basis. The protection current is appropriately increased without affecting the temperature of the display device. In addition, although the first low-frequency control signal LC1 and the second low-frequency control signal LC2 are input to the first low-frequency control signal bus 11 and the second low-frequency control signal bus 12 through the first resistor R1 and the second resistor R2, the first low-frequency control signal is affected. The time when the potentials on the bus 11 and the second low-frequency control signal bus 12 rise and fall, but because the first low-frequency control signal LC1 and the second low-frequency control signal LC2 are both low-frequency signals, and generally the first low-frequency control signal LC1 and the first The two low-frequency control signals LC2 both undergo potential switching during the blanking phase of the display device, and the blanking phase is in the non-display phase, so it will not affect the display.
综上所述，本发明的显示装置包括总线组、电阻单元以及过电流保护模块，电阻单元的第一电阻的一端接入第一低频控制信号，另一端电性连接对应第一低频控制信号总线的一端，第二电阻的一端接入第二低频控制信号，另一端电性连接对应第二低频控制信号总线的一端，每一电阻单元的第一电阻及第二电阻的电阻之和大于第一低频控制信号的高电位和低电位之差与预设的保护电流的比值，使得第一低频控制信号总线及第二低频控制信号总线不论在何位置短路，第一低频控制信号总线及第二低频控制信号总线的电流均会小于保护电流，从而有利于在不影响显示装置温度的前提下将保护电流值设置得更高。In summary, the display device of the present invention includes a bus group, a resistance unit, and an overcurrent protection module. One end of the first resistance of the resistance unit is connected to the first low-frequency control signal, and the other end is electrically connected to the first low-frequency control signal bus. One end, one end of the second resistor is connected to the second low-frequency control signal, and the other end is electrically connected to one end corresponding to the second low-frequency control signal bus. The sum of the resistances of the first resistance and the second resistance of each resistance unit is greater than the first resistance. The ratio of the difference between the high potential and the low potential of the low-frequency control signal to the preset protection current makes the first low-frequency control signal bus and the second low-frequency control signal bus short-circuited no matter where they are. The current of the control signal bus will be less than the protection current, which is conducive to setting the protection current value higher without affecting the temperature of the display device.
以上所述，对于本领域的普通技术人员来说，可以根据本发明的技术方案和技术构思作出其他各种相应的改变和变形，而所有这些改变和变形都应属于本发明权利要求的保护范围。As described above, for a person of ordinary skill in the art, various other corresponding changes and modifications can be made according to the technical solution and technical concept of the present invention, and all these changes and deformations should fall within the protection scope of the claims of the present invention. .

Claims (20)

  1. 一种显示装置，包括至少一个总线组、至少一个电阻单元以及过电流保护模块；A display device includes at least one bus group, at least one resistance unit, and an overcurrent protection module;
    一电阻单元与一总线组对应；每一总线组包括第一低频控制信号总线及第二低频控制信号总线；每一电阻单元包括第一电阻及第二电阻；所述第一电阻的一端接入第一低频控制信号，另一端电性连接对应总线组的第一低频控制信号总线的一端，所述第二电阻的一端接入第二低频控制信号，另一端电性连接对应总线组的第二低频控制信号总线的一端；A resistor unit corresponds to a bus group; each bus group includes a first low-frequency control signal bus and a second low-frequency control signal bus; each resistor unit includes a first resistor and a second resistor; one end of the first resistor is connected The other end of the first low-frequency control signal is electrically connected to one end of the first low-frequency control signal bus corresponding to the bus group, one end of the second resistor is connected to the second low-frequency control signal, and the other end is electrically connected to the second corresponding to the bus group. One end of the low-frequency control signal bus;
    所述第一低频控制信号及第二低频控制信号均为脉冲信号且相位相反；每一电阻单元的第一电阻及第二电阻的电阻之和大于第一低频控制信号的高电位和低电位之差与预设的保护电流的比值；The first low frequency control signal and the second low frequency control signal are both pulse signals and have opposite phases; the sum of the resistances of the first resistance and the second resistance of each resistance unit is greater than the high potential and the low potential of the first low frequency control signal. The ratio of the difference to the preset protection current;
    所述过电流保护模块电性连接每一总线组的第一低频控制信号总线的一端及第二低频控制信号总线的一端，用于在侦测到任意一总线组的第一低频控制信号总线及第二低频控制信号总线的电流大于预设的保护电流时触发过电流保护；The overcurrent protection module is electrically connected to one end of the first low-frequency control signal bus and one end of the second low-frequency control signal bus of each bus group, and is configured to detect the first low-frequency control signal bus and Overcurrent protection is triggered when the current of the second low-frequency control signal bus is greater than a preset protection current;
    所述显示装置还包括多条时钟信号总线，所述过电流保护模块电性连接多条时钟信号总线；The display device further includes multiple clock signal buses, and the overcurrent protection module is electrically connected to the multiple clock signal buses;
    所述第一低频控制信号及第二低频控制信号的占空比均为0.5，周期均为3.34s。The first low-frequency control signal and the second low-frequency control signal have a duty ratio of 0.5 and a period of 3.34s.
  2. 如权利要求1所述的显示装置，其中所述过电流保护模块与每一第一电阻及每一第二电阻的一端电性连接从而电性连接每一总线组的第一低频控制信号总线的一端及第二低频控制信号总线的一端。The display device of claim 1, wherein the overcurrent protection module is electrically connected to one end of each of the first resistors and each of the second resistors so as to be electrically connected to the first low-frequency control signal bus of each bus group. One end and one end of the second low-frequency control signal bus.
  3. 如权利要求1所述的显示装置，其中每一电阻单元的第一电阻及第二电阻的电阻之和大于1000Ω。The display device of claim 1, wherein a sum of the resistances of the first resistance and the second resistance of each resistance unit is greater than 1000Ω.
  4. 如权利要求1所述的显示装置，还包括衬底，所述总线组设置在所述衬底上。The display device according to claim 1, further comprising a substrate on which the bus group is disposed.
  5. 如权利要求4所述的显示装置，还包括与衬底绑定的至少第一电路板及与每一第一电路板均绑定的第二电路板；一第一电路板与一电阻单元对应；The display device according to claim 4, further comprising at least a first circuit board bound to the substrate and a second circuit board bound to each first circuit board; a first circuit board corresponding to a resistance unit ;
    所述过电流保护模块设于第二电路板上。The overcurrent protection module is disposed on a second circuit board.
  6. 如权利要求5所述的显示装置，其中每一电阻单元均设于第二电路板上；每一电阻单元的第一电阻的另一端经对应的第一电路板与对应总线组的第一低频控制信号总线的一端电性连接；每一电阻单元的第二电阻的另一端经对应的第一电路板与对应总线组的第二低频控制信号总线的一端电性连接。The display device according to claim 5, wherein each resistance unit is provided on a second circuit board; the other end of the first resistance of each resistance unit passes through the corresponding first circuit board and the first low frequency of the corresponding bus group One end of the control signal bus is electrically connected; the other end of the second resistor of each resistance unit is electrically connected to one end of the second low-frequency control signal bus of the corresponding bus group via the corresponding first circuit board.
  7. 如权利要求5所述的显示装置，其中每一电阻单元均设于对应的第一电路板上。The display device of claim 5, wherein each resistance unit is disposed on a corresponding first circuit board.
  8. 如权利要求1所述的显示装置，其中所述总线组的数量为两个。The display device according to claim 1, wherein the number of the bus groups is two.
  9. 如权利要求1所述的显示装置，其中所述过电流保护模块在侦测到多条时钟信号总线中任意一条的电流大于预设的保护电流时触发过电流保护。The display device of claim 1, wherein the overcurrent protection module triggers overcurrent protection when detecting that a current of any one of the plurality of clock signal buses is greater than a preset protection current.
  10. 如权利要求1所述的显示装置，其中所述第一低频控制信号及第二低频控制信号的高电位均为28V，低电位均为-8V。The display device according to claim 1, wherein a high potential of the first low-frequency control signal and a second low-frequency control signal are both 28V and a low potential are both -8V.
  11. 一种显示装置，包括至少一个总线组、至少一个电阻单元以及过电流保护模块；A display device includes at least one bus group, at least one resistance unit, and an overcurrent protection module;
    一电阻单元与一总线组对应；每一总线组包括第一低频控制信号总线及第二低频控制信号总线；每一电阻单元包括第一电阻及第二电阻；所述第一电阻的一端接入第一低频控制信号，另一端电性连接对应总线组的第一低频控制信号总线的一端，所述第二电阻的一端接入第二低频控制信号，另一端电性连接对应总线组的第二低频控制信号总线的一端；A resistor unit corresponds to a bus group; each bus group includes a first low-frequency control signal bus and a second low-frequency control signal bus; each resistor unit includes a first resistor and a second resistor; one end of the first resistor is connected The other end of the first low-frequency control signal is electrically connected to one end of the first low-frequency control signal bus corresponding to the bus group, one end of the second resistor is connected to the second low-frequency control signal, and the other end is electrically connected to the second corresponding to the bus group. One end of the low-frequency control signal bus;
    所述第一低频控制信号及第二低频控制信号均为脉冲信号且相位相反；每一电阻单元的第一电阻及第二电阻的电阻之和大于第一低频控制信号的高电位和低电位之差与预设的保护电流的比值；The first low frequency control signal and the second low frequency control signal are both pulse signals and have opposite phases; the sum of the resistances of the first resistance and the second resistance of each resistance unit is greater than the high potential and the low potential of the first low frequency control signal. The ratio of the difference to the preset protection current;
    所述过电流保护模块电性连接每一总线组的第一低频控制信号总线的一端及第二低频控制信号总线的一端，用于在侦测到任意一总线组的第一低频控制信号总线及第二低频控制信号总线的电流大于预设的保护电流时触发过电流保护。The overcurrent protection module is electrically connected to one end of the first low-frequency control signal bus and one end of the second low-frequency control signal bus of each bus group, and is configured to detect the first low-frequency control signal bus and When the current of the second low-frequency control signal bus is greater than a preset protection current, overcurrent protection is triggered.
  12. 如权利要求11所述的显示装置，其中所述过电流保护模块与每一第一电阻及每一第二电阻的一端电性连接从而电性连接每一总线组的第一低频控制信号总线的一端及第二低频控制信号总线的一端。The display device of claim 11, wherein the overcurrent protection module is electrically connected to one end of each of the first resistors and each of the second resistors so as to be electrically connected to the first low-frequency control signal bus of each bus group. One end and one end of the second low-frequency control signal bus.
  13. 如权利要求11所述的显示装置，其中每一电阻单元的第一电阻及第二电阻的电阻之和大于1000Ω。The display device of claim 11, wherein a sum of the resistances of the first resistance and the second resistance of each resistance unit is greater than 1000Ω.
  14. 如权利要求11所述的显示装置，还包括衬底，所述总线组设置在所述衬底上。The display device according to claim 11, further comprising a substrate on which the bus group is disposed.
  15. 如权利要求14所述的显示装置，还包括与衬底绑定的至少第一电路板及与每一第一电路板均绑定的第二电路板；一第一电路板与一电阻单元对应；The display device according to claim 14, further comprising at least a first circuit board bound to the substrate and a second circuit board bound to each first circuit board; a first circuit board corresponding to a resistance unit ;
    所述过电流保护模块设于第二电路板上。The overcurrent protection module is disposed on a second circuit board.
  16. 如权利要求15所述的显示装置，其中每一电阻单元均设于第二电路板上；每一电阻单元的第一电阻的另一端经对应的第一电路板与对应总线组的第一低频控制信号总线的一端电性连接；每一电阻单元的第二电阻的另一端经对应的第一电路板与对应总线组的第二低频控制信号总线的一端电性连接。The display device according to claim 15, wherein each resistance unit is disposed on a second circuit board; the other end of the first resistance of each resistance unit passes through the corresponding first circuit board and the first low frequency of the corresponding bus group One end of the control signal bus is electrically connected; the other end of the second resistor of each resistance unit is electrically connected to one end of the second low-frequency control signal bus of the corresponding bus group via the corresponding first circuit board.
  17. 如权利要求15所述的显示装置，其中每一电阻单元均设于对应的第一电路板上。The display device of claim 15, wherein each resistance unit is disposed on a corresponding first circuit board.
  18. 如权利要求11所述的显示装置，其中所述总线组的数量为两个。The display device according to claim 11, wherein the number of the bus groups is two.
  19. 如权利要求11所述的显示装置，还包括多条时钟信号总线；The display device according to claim 11, further comprising a plurality of clock signal buses;
    所述过电流保护模块电性连接多条时钟信号总线；所述过电流保护模块在侦测到多条时钟信号总线中任意一条的电流大于预设的保护电流时触发过电流保护。The overcurrent protection module is electrically connected to multiple clock signal buses; the overcurrent protection module triggers overcurrent protection when it detects that the current of any one of the multiple clock signal buses is greater than a preset protection current.
  20. 如权利要求11所述的显示装置，其中所述第一低频控制信号及第二低频控制信号的占空比均为0.5，周期均为3.34s；所述第一低频控制信号及第二低频控制信号的高电位均为28V，低电位均为-8V。The display device according to claim 11, wherein the first low-frequency control signal and the second low-frequency control signal have a duty ratio of 0.5 and a period of 3.34s; the first low-frequency control signal and the second low-frequency control signal The high potential of the signal is 28V and the low potential is -8V.
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