WO2022047903A1 - 差分信号接口及采用该差分信号接口的显示装置 - Google Patents

差分信号接口及采用该差分信号接口的显示装置 Download PDF

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Publication number
WO2022047903A1
WO2022047903A1 PCT/CN2020/121918 CN2020121918W WO2022047903A1 WO 2022047903 A1 WO2022047903 A1 WO 2022047903A1 CN 2020121918 W CN2020121918 W CN 2020121918W WO 2022047903 A1 WO2022047903 A1 WO 2022047903A1
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WO
WIPO (PCT)
Prior art keywords
impedance
receiving end
adjustable
transmitting end
differential pair
Prior art date
Application number
PCT/CN2020/121918
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English (en)
French (fr)
Inventor
刘汉先
Original Assignee
Tcl华星光电技术有限公司
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Publication date
Application filed by Tcl华星光电技术有限公司 filed Critical Tcl华星光电技术有限公司
Priority to US16/972,610 priority Critical patent/US11705049B2/en
Publication of WO2022047903A1 publication Critical patent/WO2022047903A1/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
    • G09G3/2092—Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • G09G3/2096—Details of the interface to the display terminal specific for a flat panel
    • 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
    • G09G3/2092—Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0693—Calibration of display systems
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2370/00—Aspects of data communication
    • G09G2370/08—Details of image data interface between the display device controller and the data line driver circuit
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2370/00—Aspects of data communication
    • G09G2370/16—Use of wireless transmission of display information
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
    • H03K19/0175—Coupling arrangements; Interface arrangements
    • H03K19/017545—Coupling arrangements; Impedance matching circuits

Definitions

  • the present application relates to the field of display technology, and in particular, to a differential signal interface and a display device using the differential signal interface.
  • the mini-LVDS interface is often used to transmit signals between the timing control board and the display panel of the display device, and the quality of the transmitted signal is usually measured by the eye diagram.
  • the mini-LVDS interface cannot adjust the eye diagram of each received signal, the signal sent from the same end is due to the different input and output impedance matching between the sending end or the receiving end and the transmission line, resulting in the transmission signal being generated at the sending end or the receiving end. reflections, so that there are differences between the eye diagrams of the signals received at different receivers.
  • the eye diagrams of some transmission signals cannot meet the requirements of the specification, and the eye diagrams of poor quality often lead to abnormal display, such as blurred screen, no image, color spots, etc., which affect the display effect.
  • the existing methods of adjusting the eye diagram of the transmission signal are to adjust the amplitude of the mini-LVDS differential signal, or to pre-emphasize the transition bit to compensate for the loss of the high-frequency component caused by the signal transition on the transmission line, but these methods have May cause electromagnetic interference (Electromagnetic Interference, EMI) problem.
  • EMI Electromagnetic Interference
  • the present application provides a differential signal interface and a display device using the differential signal interface.
  • the present application provides a differential signal interface
  • the differential signal interface includes a transmitting end and a receiving end arranged oppositely, the transmitting end transmits a differential signal to the receiving end through a plurality of differential pairs, and the differential signal interface It also includes a plurality of adjustment modules, each of which is arranged between the transmitting end and the receiving end and is connected to the corresponding differential pair; each of the adjusting modules is used to adjust the transmitting end and the receiving end. /or the impedance of the receiving end, so that the impedance of the transmitting end and/or the receiving end matches the corresponding impedance of the differential pair.
  • the adjustment module is disposed close to the sending end and/or the receiving end, the adjustment module includes a detection unit, a comparison unit and an adjustment unit connected in sequence, wherein the detection unit is used for detecting The impedance of the transmitting end and/or the receiving end and the corresponding impedance of the differential pair; the comparison unit is used to compare the impedance of the transmitting end and/or the receiving end and the corresponding impedance of the differential pair. The matching relationship between them; the adjusting unit is configured to adjust the impedance of the transmitting end and/or the receiving end according to the matching relationship.
  • the "adjusting the impedance of the transmitting end and/or the receiving end according to the matching relationship" specifically includes:
  • the matching relationship is that the impedance of the transmitting end and/or the receiving end is greater than the impedance of the corresponding differential pair, the impedance of the transmitting end and/or the receiving end is increased to the corresponding differential pair. right impedance.
  • the matching relationship is that the impedance of the transmitting end and/or the receiving end is smaller than the impedance of the corresponding differential pair, reducing the impedance of the transmitting end and/or the receiving end to the corresponding differential pair right impedance.
  • each of the differential pairs includes a first signal line and a second signal line arranged in parallel, and the adjustment unit includes two first adjustable resistors and two second adjustable resistors.
  • One of the two first adjustable resistors is connected in series with the first signal line, and the other first adjustable resistor is connected in series with the second signal line; two The first adjustable resistance is used to increase the impedance of the transmitting end and/or the receiving end.
  • the first end of the second adjustable resistor is connected to the first signal line, and the first end of the other second adjustable resistor is connected to the second adjustable resistor.
  • the signal lines are connected, and the second ends of the two second adjustable resistors are both grounded; the two second adjustable resistors are used to reduce the impedance of the transmitting end and/or the receiving end.
  • the "increasing the impedance of the transmitting end and/or the receiving end to the corresponding impedance of the differential pair” specifically includes: according to the impedance of the transmitting end and/or the receiving end The difference between the impedance and the corresponding impedance of the differential pair increases the resistance values of the two first adjustable resistors, so that the impedance of the transmitting end and/or the receiving end is increased to the corresponding impedance of the differential pair.
  • the "reducing the impedance of the transmitting end and/or the receiving end to the corresponding impedance of the differential pair” specifically includes: according to the impedance of the transmitting end and/or the receiving end and the corresponding impedance of the differential pair.
  • the difference between the impedances of the differential pair increases the resistance values of the two second adjustable resistors, so that the impedance of the transmitting end and/or the receiving end is reduced to the corresponding impedance of the differential pair .
  • the adjustment unit further includes a third adjustable resistor, a first end of the third adjustable resistor is connected to the first signal line, and a second end of the third adjustable resistor is connected to the first signal line.
  • the second signal line is connected.
  • the third adjustable resistor is disposed close to the transmitting end and/or the receiving end.
  • the adjustment unit further includes a programmable potentiometer, the programmable potentiometer is respectively connected with the first adjustable resistance, the second adjustable resistance and the third adjustable resistance, so as to use for adjusting the resistance values of the first adjustable resistor, the second adjustable resistor and the third adjustable resistor.
  • the programmable potentiometer adjusts the resistance values of the first adjustable resistor, the second adjustable resistor and the third adjustable resistor by means of register setting or external signal assignment.
  • the differential signal interface is any one of a low-voltage differential signal interface, a miniature low-voltage differential signal interface, and a VBO interface.
  • the present application further provides a display device, the display device includes a timing controller, a display panel and the above-mentioned differential signal interface, the display panel is provided with a source driver in a non-display area; the differential signal The transmitting end of the interface is connected to the timing controller, and the receiving end of the differential signal interface is connected to the source driver of the display panel;
  • the differential signal interface includes a sending end and a receiving end arranged oppositely, and the sending end transmits a differential signal to the receiving end through a plurality of differential pairs;
  • the differential signal interface further includes a plurality of adjustment modules, each of the adjustment modules is disposed between the transmitting end and the receiving end and is connected to the corresponding differential pair;
  • Each of the adjustment modules is configured to adjust the impedance of the transmitting end and/or the receiving end, so that the impedance of the transmitting end and/or the receiving end matches the impedance of the corresponding differential pair.
  • the adjustment module is disposed close to the sending end and/or the receiving end, and the adjustment module includes a detection unit, a comparison unit and an adjustment unit connected in sequence, wherein,
  • the detection unit is configured to detect the impedance of the transmitting end and/or the receiving end and the corresponding impedance of the differential pair;
  • the comparing unit is configured to compare the matching relationship between the transmitting end and/or the receiving end and the impedance of the corresponding differential pair;
  • the adjusting unit is configured to adjust the impedance of the transmitting end and/or the receiving end according to the matching relationship.
  • the "adjusting the impedance of the transmitting end and/or the receiving end according to the matching relationship" specifically includes:
  • the matching relationship is that the impedance of the transmitting end and/or the receiving end is greater than the impedance of the corresponding differential pair, the impedance of the transmitting end and/or the receiving end is increased to the corresponding differential pair. right impedance;
  • the matching relationship is that the impedance of the transmitting end and/or the receiving end is smaller than the impedance of the corresponding differential pair, reducing the impedance of the transmitting end and/or the receiving end to the corresponding differential pair right impedance.
  • each of the differential pairs includes a first signal line and a second signal line arranged in parallel, and the adjustment unit includes two first adjustable resistors and two second adjustable resistors;
  • One of the two first adjustable resistors is connected in series with the first signal line, and the other first adjustable resistor is connected in series with the second signal line; two The first adjustable resistance is used to increase the impedance of the transmitting end and/or the receiving end;
  • the first end of the second adjustable resistor is connected to the first signal line, and the first end of the other second adjustable resistor is connected to the second adjustable resistor.
  • the signal lines are connected, and the second ends of the two second adjustable resistors are both grounded; the two second adjustable resistors are used to reduce the impedance of the transmitting end and/or the receiving end.
  • the "increasing the impedance of the transmitting end and/or the receiving end to the corresponding impedance of the differential pair” specifically includes: according to the impedance of the transmitting end and/or the receiving end The difference between the impedance and the corresponding impedance of the differential pair increases the resistance values of the two first adjustable resistors, so that the impedance of the transmitting end and/or the receiving end is increased to the corresponding impedance of the differential pair.
  • the "reducing the impedance of the transmitting end and/or the receiving end to the corresponding impedance of the differential pair” specifically includes: according to the impedance of the transmitting end and/or the receiving end and the corresponding impedance of the differential pair.
  • the difference between the impedances of the differential pair increases the resistance values of the two second adjustable resistors, so that the impedance of the transmitting end and/or the receiving end is reduced to the corresponding impedance of the differential pair .
  • the adjustment unit further includes a third adjustable resistor, a first end of the third adjustable resistor is connected to the first signal line, and a second end of the third adjustable resistor is connected to the first signal line.
  • the second signal line is connected.
  • the third adjustable resistor is disposed close to the transmitting end and/or the receiving end.
  • the adjustment unit further includes a programmable potentiometer, the programmable potentiometer is respectively connected with the first adjustable resistance, the second adjustable resistance and the third adjustable resistance, so as to use for adjusting the resistance values of the first adjustable resistor, the second adjustable resistor and the third adjustable resistor.
  • the programmable potentiometer adjusts the resistance values of the first adjustable resistor, the second adjustable resistor and the third adjustable resistor by means of register setting or external signal assignment.
  • the differential signal interface is any one of a low-voltage differential signal interface, a miniature low-voltage differential signal interface, and a VBO interface.
  • differential signal interface In the differential signal interface provided by the present application and the display device using the differential signal interface, a plurality of different differential signals are transmitted between the transmitting end and the receiving end of the differential signal interface through a plurality of differential pairs.
  • a plurality of adjustment modules are arranged between, and each adjustment module is connected to the corresponding differential pair and is used to adjust the impedance of the transmitting end and/or the receiving end, so that the impedance of the transmitting end and/or the receiving end matches the impedance of the corresponding differential pair, Thereby, the eye diagram quality of the differential signal received by the receiving end is improved, and the transmission efficiency is improved.
  • Using the differential signal interface to connect the timing controller in the display device and the source controller of the display panel can improve the eye pattern quality of the display signal, prevent the display signal from being distorted, and improve the display quality of the display device.
  • FIG. 1 is a schematic structural diagram of a differential signal interface provided by an embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of an adjustment module of any differential pair of a differential signal interface provided by an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of a regulating unit of a regulating module provided by an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of a display device provided by an embodiment of the present application.
  • Impedance matching is mainly used on transmission lines, so that all high-frequency microwave signals can be transmitted to the load point, and almost no signal is reflected back to the source point, thereby improving transmission efficiency.
  • the internal resistance of the signal source and the characteristic impedance of the connected transmission line are equal in magnitude and phase, or the characteristic impedance of the transmission line and the connected load impedance are equal in magnitude and in the same phase, respectively called the input end or output end of the transmission line in an impedance matching state. referred to as impedance matching.
  • the method of impedance matching mainly includes series or parallel resistance at the signal source end or load end, where the series resistance is called series terminal matching.
  • series terminal matching when the driving ability of the signal source is not strong, the internal resistance of the signal source is lower than the characteristic impedance of the transmission line.
  • a resistor is connected in series between the signal source and the transmission line to match the output impedance of the signal source with the characteristic impedance of the transmission line to prevent the re-reflection of the signal reflected from the load end;
  • the parallel resistance is called parallel terminal matching, which is used in When the impedance of the signal source is very small, the input impedance of the load end is matched with the characteristic impedance of the transmission line by connecting a resistor in parallel with the load end, thereby eliminating the reflection at the load end.
  • the display device uses high-frequency signals. Because the high-frequency signal has high frequency and short wavelength, it is necessary to consider the reflection problem of the transmission line. When the wavelength is as short as the length of the transmission line, the reflected signal and the original signal will be superimposed and the shape of the original signal will be changed. . If the characteristic impedance of the transmission line is not equal to or does not match the impedance of the signal source or load, reflection will occur at the load end, which will affect the quality of the eye diagram of the transmitted signal and cause the transmitted signal to be distorted.
  • an embodiment of the present application provides a differential signal interface, in which the signal source is called the sending end, and the load is called the receiving end.
  • FIG. 1 is a schematic structural diagram of a differential signal interface provided by an embodiment of the application.
  • the differential signal interface 1 includes a sending end and a receiving end that are arranged oppositely.
  • the sending end transmits differential signals to the receiving end through a plurality of differential pairs.
  • the differential signal interface 1 further includes a plurality of adjustment modules 2, each adjustment module 2 is disposed between the transmitting end and the receiving end and is connected with a corresponding differential pair; each adjustment module 2 is used to adjust the impedance of the transmitting end and/or the receiving end , so that the impedance of the transmitting end and/or the receiving end matches the impedance of the corresponding differential pair.
  • the transmitting end of the differential signal interface 1 transmits differential signals to the receiving end through n differential pairs, where n is a positive integer, and each differential pair includes two signal lines.
  • the transmitting ends of the first differential pair are TX11 and TX12
  • the receiver corresponds to RX11 and RX12
  • the transmitter of the second differential pair is TX21 and TX22
  • the receiver corresponds to RX21 and RX22
  • the transmitter of the nth differential pair is TXn1 and TXn2
  • the receiver corresponds to RXn1 and RXn2.
  • Each differential signal is transmitted using two signal lines of a differential pair to improve anti-interference ability and redundancy.
  • the differential signal interface 1 is provided with an adjustment module 2 on each differential pair, and the adjustment module 2 is located between the transmitting end and the receiving end and is connected to the corresponding differential pair.
  • the impedance of the transmitter or receiver of any differential pair does not match the impedance of the corresponding differential pair, adjust the impedance of the transmitter or receiver through the adjustment module 2 connected to the differential pair, so that the impedance of the transmitter or receiver can match the impedance of the receiver.
  • the impedance of the corresponding differential pair is matched, so that the signal transmitted by the differential pair will not be reflected at the receiving end, so that different differential signals can be transmitted by adjusting the impedance of the sending end or the receiving end. compatibility.
  • the differential signal interface 1 provided by the embodiment of the present application transmits a plurality of different differential signals through a plurality of differential pairs between the transmitting end and the receiving end, and a plurality of adjustment modules 2 are arranged between the transmitting end and the receiving end, each The adjustment module 2 is connected to the corresponding differential pair and used to adjust the impedance of the transmitting end and/or the receiving end, so that the impedance of the transmitting end and/or the receiving end matches the impedance of the corresponding differential pair, thereby improving the differential signal received by the receiving end
  • the eye diagram quality is improved, and the transmission efficiency is improved.
  • FIG. 2 is a schematic structural diagram of the adjustment module 2 of any differential pair of the differential signal interface 1 provided in the embodiment of the application.
  • the adjustment module 2 is disposed close to the transmitting end and/or the receiving end, and the adjustment module 2 includes sequentially The connected detection unit 201, the comparison unit 202 and the adjustment unit 203, wherein the detection unit 201 is used to detect the impedance of the transmitting end and/or the receiving end and the impedance of the corresponding differential pair; the comparing unit 202 is used to compare the transmitting end and/or the receiving end The matching relationship between the impedance of the terminal and the impedance of the corresponding differential pair; the adjustment unit 203 is configured to adjust the impedance of the transmitting terminal and/or the receiving terminal according to the matching relationship between the impedance of the transmitting terminal and/or the receiving terminal and the impedance of the corresponding differential pair. impedance.
  • the adjusting module 2 in order to adjust the impedance of the transmitting end and the receiving end conveniently, the adjusting module 2 is arranged near the transmitting end or the receiving end, wherein the adjusting module 2 near the transmitting end is used to adjust the impedance of the transmitting end. , the adjustment module 2 close to the receiving end is used to adjust the impedance of the receiving end.
  • the adjustment module 2 may be provided only at the transmitting end or only the receiving end, or the adjusting module 2 may be provided at the transmitting end and the receiving end at the same time, so as to adjust the impedance of the transmitting end and the receiving end in a targeted manner.
  • each adjustment module 2 first uses the detection unit 201 to detect the impedance of the transmitting end or the receiving end and the impedance of the corresponding differential pair, and then uses the comparing unit 202 to compare the impedance of the transmitting end or the receiving end and the impedance of the corresponding differential pair. Matching relationship. Finally, the adjustment module 2 is used to adjust the impedance of the sending end or the receiving end according to the matching relationship between the impedance of the sending end or the receiving end and the impedance of the corresponding differential pair, so that the impedance of the sending end or the receiving end is equal to the impedance of the corresponding differential pair. match.
  • the adjusting unit 203 adjusts the impedance of the transmitting end or the receiving end according to the matching relationship between the impedance of the transmitting end or the receiving end and the impedance of the corresponding differential pair, and specifically includes:
  • the matching relationship is that the impedance of the transmitting end and/or the receiving end is greater than the impedance of the corresponding differential pair, the impedance of the transmitting end and/or the receiving end is increased to the impedance of the corresponding differential pair.
  • the matching relationship is that the impedance of the transmitting end and/or the receiving end is smaller than the impedance of the corresponding differential pair, the impedance of the transmitting end and/or the receiving end is reduced to the impedance of the corresponding differential pair.
  • each differential pair includes a first signal line and a second signal line arranged in parallel.
  • the first signal line is between the transmitting end TX11 and the receiving end RX11, and the connection between the transmitting end TX12 and the receiving end RX12 is the first signal line. It is the second signal line; the first signal line between the sending end TX21 and the receiving end RX21, the second signal line between the sending end TX22 and the receiving end RX22...
  • the second signal line is between the transmitting end TXn2 and the receiving end RXn2.
  • the adjustment unit 203 includes two first adjustable resistors R1 and two second adjustable resistors R2, wherein:
  • One of the two first adjustable resistors R1 is connected in series with the first signal line, and the other first adjustable resistor R1 is connected in series with the second signal line; the two first adjustable resistors R1 are used for to increase the impedance of the transmitter and/or receiver.
  • the first end of one of the two second adjustable resistors R2 is connected to the first signal line, and the first end of the other second adjustable resistor R2 is connected to the second signal line.
  • the second ends of the two adjustable resistors R2 are both grounded; the two second adjustable resistors R2 are used to reduce the impedance of the transmitting end and/or the receiving end.
  • one of the two first adjustable resistors R1 in each adjustment unit 203 is connected in series with the first signal line, and the other is connected in series with the second signal line, so as to increase the impedance of the transmitting end or the receiving end;
  • One of the second adjustable resistors R2 is connected in parallel with the first signal line and grounded, and the other is connected in parallel with the second signal line and grounded, so as to reduce the impedance of the transmitting end or the receiving end.
  • the impedance of the transmitting end or the receiving end is matched with the impedance of the differential pair connected to the adjusting module 2 where the adjusting unit 203 is located.
  • the two first adjustable resistors R1 are increased according to the difference between the impedance of the transmitting end and/or the receiving end and the impedance of the corresponding differential pair. , so that the impedance of the transmitting end and/or the receiving end increases to the impedance of the corresponding differential pair.
  • the two second adjustable resistors R2 are increased according to the difference between the impedance of the transmitting end and/or the receiving end and the impedance of the corresponding differential pair. , so that the impedance of the transmitting end and/or the receiving end is reduced to the impedance of the corresponding differential pair.
  • the adjustment unit 203 further includes a third adjustable resistor R3, the first end of the third adjustable resistor R3 is connected to the first signal line, and the second end of the third adjustable resistor R3 is connected to the first signal line.
  • the two signal lines are connected, and the third adjustable resistor R3 is arranged close to the transmitting end and/or the receiving end, which can further prevent the signal from being reflected at the transmitting end and/or the receiving end.
  • first adjustable resistor R1 the second adjustable resistor R2 and the third adjustable resistor R3 may actually be a combination of one or more of resistors, capacitors and inductors, and can be set according to requirements.
  • the adjustment unit 203 further includes a programmable potentiometer (not shown in the figure), and the programmable potentiometer is respectively connected with the first adjustable resistor R1 , the second adjustable resistor R2 and the third adjustable resistor R3 is connected to adjust the resistance values of the first adjustable resistor R1, the second adjustable resistor R2 and the third adjustable resistor R3.
  • the programmable potentiometer adjusts the resistance values of the first adjustable resistor R1 , the second adjustable resistor R2 and the third adjustable resistor R3 by means of register setting or external signal assignment.
  • differential signal interface may be any of differential signal interfaces such as a low-voltage differential signal (LVDS) interface, a mini-low-voltage differential signal (mini-LVDS) interface, and a V-by-one (VBO) interface.
  • LVDS low-voltage differential signal
  • mini-LVDS mini-low-voltage differential signal
  • VBO V-by-one
  • FIG. 4 is a schematic structural diagram of a display device provided by an embodiment of the present application. As shown in FIG. 4 , the present application further provides a display device 3 .
  • the display device 3 includes a timing controller 4 , a display panel 5 and the above differential signal interface 1 , the display panel 5 is provided with a source driver 6 in the non-display area; the transmitting end of the differential signal interface 1 is connected to the timing controller 4 , and the receiving end of the differential signal interface 1 is connected to the timing controller 4 of the display panel 5 .
  • the timing controller 4 of the display device 3 transmits to the receiving end through the transmitting end of the differential signal interface 1 , and then the receiving end transmits control signals and pixel data to the source driver 6 of the display panel 5 .
  • the differential signal interface 1 can greatly reduce the signal reflection and overshoot of the signal received by the receiving end, improve the signal transmission efficiency, and prevent the signal from occurring during the transmission process. distortion.
  • the display panel using the differential signal interface can be applied to differential signals of different frequencies and has a good display effect.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
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Abstract

一种差分信号接口（1）及采用该差分信号接口（1）的显示装置（3），该差分信号接口（1）的发送端和接收端之间通过多个差分对传输多个不同的差分信号，在发送端与接收端之间设置有多个调节模块（2），每个调节模块（2）与对应的差分对连接并用于调节发送端和/或接收端的阻抗，以使得发送端和/或接收端的阻抗与对应的差分对的阻抗相匹配。

Description

差分信号接口及采用该差分信号接口的显示装置 技术领域
本申请涉及显示技术领域，尤其涉及一种差分信号接口及采用该差分信号接口的显示装置。
 背景技术
目前，显示装置的时序控制板和显示面板之间常采用mini-LVDS接口传输信号，而传输信号的质量通常用眼图来衡量好坏。
由于mini-LVDS接口不能对接收的每个信号进行眼图调整，因此同一端发出的信号由于发送端或接收端与传输线之间的输入输出阻抗匹配不同，导致传输信号在发送端或接收端产生反射，从而使不同接收端接收到的信号的眼图之间存在差异。针对不同材质和长度的传输线，有的传输信号的眼图无法满足规格书的要求，而质量差的眼图往往会带来显示异常，如花屏、无像、彩斑等现象，影响显示效果。
 技术问题
现有的调整传输信号的眼图的方式为调整mini-LVDS差分信号的幅值，或对跳变位预加重处理补偿传输线上因信号跳变产生的针对高频分量的损耗，但是这些方式有可能带来电磁干扰 (Electromagnetic Interference，EMI)问题。
 技术解决方案
为了改善传输信号的眼图，本申请提供一种差分信号接口及采用该差分信号接口的显示装置。
第一方面，本申请提供一种差分信号接口，该差分信号接口包括相对设置的发送端和接收端，所述发送端通过多个差分对向所述接收端传输差分信号，所述差分信号接口还包括多个调节模块，每个所述调节模块设置于所述发送端与所述接收端之间且与对应的所述差分对连接；每个所述调节模块用于调节所述发送端和/或所述接收端的阻抗，以使得所述发送端和/或所述接收端的阻抗与对应的所述差分对的阻抗相匹配。
在一些实施例中，所述调节模块靠近所述发送端和/或所述接收端设置，所述调节模块包括依次连接的检测单元、比较单元和调节单元，其中，所述检测单元用于检测所述发送端和/或所述接收端的阻抗以及对应的所述差分对的阻抗；所述比较单元用于比较所述发送端和/或所述接收端与对应的所述差分对的阻抗之间的匹配关系；所述调节单元用于根据所述匹配关系，调节所述发送端和/或所述接收端的阻抗。
在一些实施例中，所述“根据所述匹配关系，调节所述发送端和/或所述接收端的阻抗”，具体包括：
若所述匹配关系为所述发送端和/或所述接收端的阻抗大于对应的所述差分对的阻抗，则将所述发送端和/或所述接收端的阻抗增大至对应的所述差分对的阻抗。
若所述匹配关系为所述发送端和/或所述接收端的阻抗小于对应的所述差分对的阻抗，则将所述发送端和/或所述接收端的阻抗减小至对应的所述差分对的阻抗。
在一些实施例中，每个所述差分对包括平行设置的第一信号线和第二信号线，所述调节单元包括两个第一可调电阻和两个第二可调电阻。
两个所述第一可调电阻中的一个所述第一可调电阻串联于所述第一信号线上，另一个所述第一可调电阻串联于所述第二信号线上；两个所述第一可调电阻用于增大所述发送端和/或所述接收端的阻抗。
两个所述第二可调电阻中的一个所述第二可调电阻的第一端与所述第一信号线连接，另一个所述第二可调电阻的第一端与所述第二信号线连接，两个所述第二可调电阻的第二端均接地；两个所述第二可调电阻用于减小所述发送端和/或所述接收端的阻抗。
在一些实施例中，所述“将所述发送端和/或所述接收端的阻抗增大至对应的所述差分对的阻抗”，具体包括：根据所述发送端和/或所述接收端的阻抗与对应的所述差分对的阻抗之间的差值，增大两个所述第一可调电阻的电阻值，以使得所述发送端和/或所述接收端的阻抗增大至对应的所述差分对的阻抗。
所述“将所述发送端和/或所述接收端的阻抗减小至对应的所述差分对的阻抗”，具体包括：根据所述发送端和/或所述接收端的阻抗与对应的所述差分对的阻抗之间的差值，增大两个所述第二可调电阻的电阻值，以使得所述发送端和/或所述接收端的阻抗减小至对应的所述差分对的阻抗。
在一些实施例中，所述调节单元还包括第三可调电阻，所述第三可调电阻的第一端与所述第一信号线连接，所述第三可调电阻的第二端与所述第二信号线连接。
在一些实施例中，所述第三可调电阻靠近所述发送端和/或所述接收端设置。
在一些实施例中，所述调节单元还包括可编程电位器，所述可编程电位器分别与所述第一可调电阻、所述第二可调电阻和第三可调电阻连接，以用于调节所述第一可调电阻、所述第二可调电阻和第三可调电阻的电阻值。
在一些实施例中，所述可编程电位器通过寄存器设置或外部信号赋值的方式调节所述第一可调电阻、所述第二可调电阻和所述第三可调电阻的电阻值。
在一些实施例中，所述差分信号接口为低压差分信号接口、微型低压差分信号接口和VBO接口中的任意一种。
第二方面，本申请还提供一种显示装置，该显示装置包括时序控制器、显示面板以及如上所述的差分信号接口，所述显示面板在非显示区设置有源极驱动器；所述差分信号接口的发送端连接所述时序控制器，所述差分信号接口的接收端连接所述显示面板的源极驱动器；
其中，所述差分信号接口包括相对设置的发送端和接收端，所述发送端通过多个差分对向所述接收端传输差分信号；
所述差分信号接口还包括多个调节模块，每个所述调节模块设置于所述发送端与所述接收端之间且与对应的所述差分对连接；
每个所述调节模块用于调节所述发送端和/或所述接收端的阻抗，以使得所述发送端和/或所述接收端的阻抗与对应的所述差分对的阻抗相匹配。
在一些实施例中，所述调节模块靠近所述发送端和/或所述接收端设置，所述调节模块包括依次连接的检测单元、比较单元和调节单元，其中，
所述检测单元用于检测所述发送端和/或所述接收端的阻抗以及对应的所述差分对的阻抗；
所述比较单元用于比较所述发送端和/或所述接收端与对应的所述差分对的阻抗之间的匹配关系；
所述调节单元用于根据所述匹配关系，调节所述发送端和/或所述接收端的阻抗。
在一些实施例中，所述“根据所述匹配关系，调节所述发送端和/或所述接收端的阻抗”，具体包括：
若所述匹配关系为所述发送端和/或所述接收端的阻抗大于对应的所述差分对的阻抗，则将所述发送端和/或所述接收端的阻抗增大至对应的所述差分对的阻抗；
若所述匹配关系为所述发送端和/或所述接收端的阻抗小于对应的所述差分对的阻抗，则将所述发送端和/或所述接收端的阻抗减小至对应的所述差分对的阻抗。
在一些实施例中，每个所述差分对包括平行设置的第一信号线和第二信号线，所述调节单元包括两个第一可调电阻和两个第二可调电阻；
两个所述第一可调电阻中的一个所述第一可调电阻串联于所述第一信号线上，另一个所述第一可调电阻串联于所述第二信号线上；两个所述第一可调电阻用于增大所述发送端和/或所述接收端的阻抗；
两个所述第二可调电阻中的一个所述第二可调电阻的第一端与所述第一信号线连接，另一个所述第二可调电阻的第一端与所述第二信号线连接，两个所述第二可调电阻的第二端均接地；两个所述第二可调电阻用于减小所述发送端和/或所述接收端的阻抗。
在一些实施例中，所述“将所述发送端和/或所述接收端的阻抗增大至对应的所述差分对的阻抗”，具体包括：根据所述发送端和/或所述接收端的阻抗与对应的所述差分对的阻抗之间的差值，增大两个所述第一可调电阻的电阻值，以使得所述发送端和/或所述接收端的阻抗增大至对应的所述差分对的阻抗。
所述“将所述发送端和/或所述接收端的阻抗减小至对应的所述差分对的阻抗”，具体包括：根据所述发送端和/或所述接收端的阻抗与对应的所述差分对的阻抗之间的差值，增大两个所述第二可调电阻的电阻值，以使得所述发送端和/或所述接收端的阻抗减小至对应的所述差分对的阻抗。
在一些实施例中，所述调节单元还包括第三可调电阻，所述第三可调电阻的第一端与所述第一信号线连接，所述第三可调电阻的第二端与所述第二信号线连接。
在一些实施例中，所述第三可调电阻靠近所述发送端和/或所述接收端设置。
在一些实施例中，所述调节单元还包括可编程电位器，所述可编程电位器分别与所述第一可调电阻、所述第二可调电阻和第三可调电阻连接，以用于调节所述第一可调电阻、所述第二可调电阻和第三可调电阻的电阻值。
在一些实施例中，所述可编程电位器通过寄存器设置或外部信号赋值的方式调节所述第一可调电阻、所述第二可调电阻和所述第三可调电阻的电阻值。
在一些实施例中，所述差分信号接口为低压差分信号接口、微型低压差分信号接口和VBO接口中的任意一种。
 有益效果
本申请提供的差分信号接口及采用该差分信号接口的显示装置中，该差分信号接口的发送端和接收端之间通过多个差分对传输多个不同的差分信号，在发送端与接收端之间设置有多个调节模块，每个调节模块与对应的差分对连接并用于调节发送端和/或接收端的阻抗，以使得发送端和/或接收端的阻抗与对应的差分对的阻抗相匹配，从而改善接收端接收到的差分信号的眼图质量，提高传输效率。将该差分信号接口用于连接显示装置中的时序控制器和显示面板的源极控制器，可以改善显示信号的眼图质量，防止显示信号发生畸变，提高显示装置的显示品质。
 附图说明
图1为本申请实施例提供的差分信号接口的结构示意图。
图2为本申请实施例提供的差分信号接口的任意一个差分对的调节模块的结构示意图。
图3为本申请实施例提供的调节模块的调节单元的结构示意图。
图4为本申请实施例提供的显示装置的结构示意图。
 本发明的实施方式
为使本申请的目的、技术方案及效果更加清楚、明确，以下参照附图并举实施例对本申请进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本申请，并不用于限定本申请。
阻抗匹配（impedance matching）主要用于传输线上，以此来达到所有高频的微波信号均能传递至负载点的目的，而且几乎不会有信号反射回来源点，从而提升传输效率。信号源的内阻与所接传输线的特性阻抗大小相等且相位相同，或传输线的特性阻抗与所接负载阻抗的大小相等且相位相同，分别称为传输线的输入端或输出端处于阻抗匹配状态，简称为阻抗匹配。
阻抗匹配的方法主要包括在信号源端或负载端串联或并联电阻，其中，串联电阻被称为串联终端匹配，例如在信号源的驱动能力不强，信号源的内阻低于传输线的特征阻抗时，在信号源和传输线之间串联一个电阻，使信号源的输出阻抗与传输线的特征阻抗相匹配，抑制从负载端反射回来的信号发生再次反射；并联电阻被称为并联终端匹配，是在信号源的阻抗很小时，通过在负载端并联电阻使负载端的输入阻抗与传输线的特征阻抗相匹配，从而消除负载端的反射。
显示设备采用高频信号，由于高频信号频率高、波长短，因此需要考虑传输线的反射问题，当波长短到与传输线的长度相当时，反射信号与原信号叠加后将会改变原信号的形状。如果传输线的特征阻抗与信号源或负载的阻抗不相等或不匹配时，在负载端就会产生反射，影响传输信号的眼图质量，使得传输信号发生畸变。
为了解决上述问题，本申请实施例提供一种差分信号接口，其中将信号源称为发送端，将负载称为接收端。
图1为本申请实施例提供的差分信号接口的结构示意图，如图1所示，差分信号接口1包括相对设置的发送端和接收端，发送端通过多个差分对向接收端传输差分信号，差分信号接口1还包括多个调节模块2，每个调节模块2设置于发送端与接收端之间且与对应的差分对连接；每个调节模块2用于调节发送端和/或接收端的阻抗，以使得发送端和/或接收端的阻抗与对应的差分对的阻抗相匹配。
具体地，差分信号接口1的发送端通过n个差分对向接收端传输差分信号，n为正整数，每个差分对包括两条信号线，例如，第一个差分对的发送端为TX11和TX12，接收端对应为RX11和RX12；第二个差分对的发送端为TX21和TX22，接收端对应为RX21和RX22……第n个差分对的发送端为TXn1和TXn2，接收端对应为RXn1和RXn2。每种差分信号采用一个差分对的两条信号线进行传递，以此提高抗干扰能力和冗余能力。
进一步地，差分信号接口1在每个差分对上都设置有调节模块2，调节模块2处于发送端和接收端之间且与对应的差分对连接。当任意一个差分对的发送端或接收端的阻抗与对应的差分对的阻抗不匹配时，通过与该差分对连接的调节模块2调节发送端或接收端的阻抗，使得发送端或接收端的阻抗能与对应的差分对的阻抗相匹配，从而使得该差分对传输的信号在接收端不会产生反射，使得不同的差分信号可以通过调整发送端或接收端的阻抗来实现传输，提高对不同的差分信号的兼容性。
本申请实施例提供的差分信号接口1在发送端与接收端之间通过多个差分对来传输多个不同的差分信号，在发送端与接收端之间设置有多个调节模块2，每个调节模块2与对应的差分对连接并用于调节发送端和/或接收端的阻抗，以使得发送端和/或接收端的阻抗与对应的差分对的阻抗相匹配，从而改善接收端接收到的差分信号的眼图质量，提高传输效率。
图2为本申请实施例提供的差分信号接口1的任意一个差分对的调节模块2的结构示意图，如图2所示，调节模块2靠近发送端和/或接收端设置，调节模块2包括依次连接的检测单元201、比较单元202和调节单元203，其中，检测单元201用于检测发送端和/或接收端的阻抗以及对应的差分对的阻抗；比较单元202用于比较发送端和/或接收端的阻抗与对应的差分对的阻抗之间的匹配关系；调节单元203用于根据发送端和/或接收端的阻抗与对应的差分对的阻抗之间的匹配关系，调节发送端和/或接收端的阻抗。
可以理解的是，在差分信号接口1中，为了方便调节发送端和接收端的阻抗，将调节模块2设置于靠近发送端或接收端的位置，其中，靠近发送端的调节模块2用于调节发送端的阻抗，靠近接收端的调节模块2用于调节接收端的阻抗。另外，既可以仅在发送端或仅在接收端设置调节模块2，也可以在发送端和接收端同时设置调节模块2，从而针对性地对发送端和接收端的阻抗进行调节。
具体地，每个调节模块2首先利用检测单元201检测发送端或接收端的阻抗以及对应的差分对的阻抗，然后利用比较单元202比较发送端或接收端的阻抗与对应的差分对的阻抗之间的匹配关系，最后利用调节模块2根据发送端或接收端的阻抗与对应的差分对的阻抗之间的匹配关系，调节发送端或接收端的阻抗，使得发送端或接收端的阻抗与对应的差分对的阻抗相匹配。
其中，调节单元203据发送端或接收端的阻抗与对应的差分对的阻抗之间的匹配关系，调节发送端或接收端的阻抗，具体包括：
若匹配关系为发送端和/或接收端的阻抗大于对应的差分对的阻抗，则将发送端和/或接收端的阻抗增大至对应的差分对的阻抗。
若匹配关系为发送端和/或接收端的阻抗小于对应的差分对的阻抗，则将发送端和/或接收端的阻抗减小至对应的差分对的阻抗。
如图1所示，每个差分对包括平行设置的第一信号线和第二信号线，例如，发送端TX11和接收端RX11之间为第一信号线，发送端TX12和接收端RX12之间为第二信号线；发送端TX21和接收端RX21之间为第一信号线，发送端TX22和接收端RX22之间为第二信号线……发送端TXn1和接收端RXn1之间为第一信号线，发送端TXn2和接收端RXn2之间为第二信号线。
图3为本申请实施例提供的调节模块的调节单元的结构示意图，如图3所示，调节单元203包括两个第一可调电阻R1和两个第二可调电阻R2，其中：
两个第一可调电阻R1中的一个第一可调电阻R1串联于第一信号线上，另一个第一可调电阻R1串联于第二信号线上；两个第一可调电阻R1用于增大发送端和/或接收端的阻抗。
两个第二可调电阻R2中的一个第二可调电阻R2的第一端与第一信号线连接，另一个第二可调电阻R2的第一端与第二信号线连接，两个第二可调电阻R2的第二端均接地；两个第二可调电阻R2用于减小发送端和/或接收端的阻抗。
具体地，每个调节单元203中的两个第一可调电阻R1中的其中一个与第一信号线串联，另一个与第二信号线串联，用于增大发送端或接收端的阻抗；两个第二可调电阻R2中的其中一个与第一信号线并联且接地，另一个与第二信号线并联且接地，用于减小发送端或接收端的阻抗。这样通过调整发送端或接收端的阻抗，从而使得发送端或接收端的阻抗与该调节单元203所在的调节模块2连接的差分对的阻抗相匹配。
若发送端和/或接收端的阻抗小于对应的差分对的阻抗，则根据发送端和/或接收端的阻抗与对应的差分对的阻抗之间的差值，增大两个第一可调电阻R1的电阻值，以使得发送端和/或接收端的阻抗增大至对应的差分对的阻抗。
若发送端和/或接收端的阻抗大于对应的差分对的阻抗，则根据发送端和/或接收端的阻抗与对应的差分对的阻抗之间的差值，增大两个第二可调电阻R2的电阻值，以使得发送端和/或接收端的阻抗减小至对应的差分对的阻抗。
进一步地，如图3所示，调节单元203还包括第三可调电阻R3，第三可调电阻R3的第一端与第一信号线连接，第三可调电阻R3的第二端与第二信号线连接，第三可调电阻R3靠近发送端和/或接收端设置，可进一步防止信号在发送端和/或接收端发生反射。
需要说明的是，第一可调电阻R1、第二可调电阻R2和第三可调电阻R3实际上可以是电阻、电容和电感中的一种或多种的组合，可根据需求自行设置。
在一些实施例中，调节单元203还包括可编程电位器（图中未示出），可编程电位器分别与所述第一可调电阻R1、第二可调电阻R2和第三可调电阻R3连接，用于调节第一可调电阻R1、第二可调电阻R2和第三可调电阻R3的电阻值。
具体地，可编程电位器通过寄存器设置或外部信号赋值的方式来调节第一可调电阻R1、第二可调电阻R2和第三可调电阻R3的电阻值。
可以理解的是，上述实施例提供的差分信号接口可以为低压差分信号（LVDS）接口、微型低压差分信号（mini-LVDS）接口和V-by-one（VBO）接口等差分信号接口中的任意一种。
图4为本申请实施例提供的显示装置的结构示意图，如图4所示，本申请还提供一种显示装置3，显示装置3包括时序控制器4、显示面板5以及如上的差分信号接口1，显示面板5在非显示区设置有源极驱动器6；用差分信号接口1的发送端连接时序控制器4，差分信号接口1的接收端连接显示面板5的时序控制器4。
具体地，显示装置3的时序控制器4通过差分信号接口1的发送端传输到接收端，再由接收端向显示面板5的源极驱动器6传输控制信号和像素数据。
经过对差分信号接口1的传输信号的眼图试验，可知差分信号接口1能使接收端接收的信号能大大减小信号反射及过冲现象，能提高信号传输效率，防止信号在传输过程中发生畸变。采用该差分信号接口的显示面板能适用于不同频率的差分信号，且显示效果良好。
可以理解的是，对本领域普通技术人员来说，可以根据本申请的技术方案及其发明构思加以等同替换或改变，而所有这些改变或替换都应属于本申请所附的权利要求的保护范围。

Claims (20)

  1. 一种差分信号接口，包括相对设置的发送端和接收端，所述发送端通过多个差分对向所述接收端传输差分信号，其中，所述差分信号接口还包括多个调节模块，每个所述调节模块设置于所述发送端与所述接收端之间且与对应的所述差分对连接；
    每个所述调节模块用于调节所述发送端和/或所述接收端的阻抗，以使得所述发送端和/或所述接收端的阻抗与对应的所述差分对的阻抗相匹配。
  2. 如权利要求1所述的差分信号接口，其中，所述调节模块靠近所述发送端和/或所述接收端设置，所述调节模块包括依次连接的检测单元、比较单元和调节单元；
    所述检测单元用于检测所述发送端和/或所述接收端的阻抗以及对应的所述差分对的阻抗；
    所述比较单元用于比较所述发送端和/或所述接收端与对应的所述差分对的阻抗之间的匹配关系；
    所述调节单元用于根据所述匹配关系，调节所述发送端和/或所述接收端的阻抗。
  3. 如权利要求2所述的差分信号接口，其中，所述“根据所述匹配关系，调节所述发送端和/或所述接收端的阻抗”，具体包括：
    若所述匹配关系为所述发送端和/或所述接收端的阻抗大于对应的所述差分对的阻抗，则将所述发送端和/或所述接收端的阻抗增大至对应的所述差分对的阻抗；
    若所述匹配关系为所述发送端和/或所述接收端的阻抗小于对应的所述差分对的阻抗，则将所述发送端和/或所述接收端的阻抗减小至对应的所述差分对的阻抗。
  4. 如权利要求3所述的差分信号接口，其中，每个所述差分对包括平行设置的第一信号线和第二信号线，所述调节单元包括两个第一可调电阻和两个第二可调电阻；
    两个所述第一可调电阻中的一个所述第一可调电阻串联于所述第一信号线上，另一个所述第一可调电阻串联于所述第二信号线上；两个所述第一可调电阻用于增大所述发送端和/或所述接收端的阻抗；
    两个所述第二可调电阻中的一个所述第二可调电阻的第一端与所述第一信号线连接，另一个所述第二可调电阻的第一端与所述第二信号线连接，两个所述第二可调电阻的第二端均接地；两个所述第二可调电阻用于减小所述发送端和/或所述接收端的阻抗。
  5. 如权利要求4所述的差分信号接口，其中，
    所述“将所述发送端和/或所述接收端的阻抗增大至对应的所述差分对的阻抗”，具体包括：根据所述发送端和/或所述接收端的阻抗与对应的所述差分对的阻抗之间的差值，增大两个所述第一可调电阻的电阻值，以使得所述发送端和/或所述接收端的阻抗增大至对应的所述差分对的阻抗；
    所述“将所述发送端和/或所述接收端的阻抗减小至对应的所述差分对的阻抗”，具体包括：根据所述发送端和/或所述接收端的阻抗与对应的所述差分对的阻抗之间的差值，增大两个所述第二可调电阻的电阻值，以使得所述发送端和/或所述接收端的阻抗减小至对应的所述差分对的阻抗。
  6. 如权利要求4所述的差分信号接口，其中，所述调节单元还包括第三可调电阻，所述第三可调电阻的第一端与所述第一信号线连接，所述第三可调电阻的第二端与所述第二信号线连接。
  7. 如权利要求6所述的差分信号接口，其中，所述第三可调电阻靠近所述发送端和/或所述接收端设置。
  8. 如权利要求4或6所述的差分信号接口，其中，所述调节单元还包括可编程电位器，所述可编程电位器分别与所述第一可调电阻、所述第二可调电阻和第三可调电阻连接，以用于调节所述第一可调电阻、所述第二可调电阻和第三可调电阻的电阻值。
  9. 如权利要求8所述的差分信号接口，其中，所述可编程电位器通过寄存器设置或外部信号赋值的方式调节所述第一可调电阻、所述第二可调电阻和所述第三可调电阻的电阻值。
  10. 如权利要求1所述的差分信号接口，其中，所述差分信号接口为低压差分信号接口、微型低压差分信号接口和VBO接口中的任意一种。
  11. 一种显示装置，其中，包括时序控制器、显示面板以及差分信号接口，所述显示面板在非显示区设置有源极驱动器；所述差分信号接口的发送端连接所述时序控制器，所述差分信号接口的接收端连接所述显示面板的源极驱动器；
    其中，所述差分信号接口包括相对设置的发送端和接收端，所述发送端通过多个差分对向所述接收端传输差分信号；
    所述差分信号接口还包括多个调节模块，每个所述调节模块设置于所述发送端与所述接收端之间且与对应的所述差分对连接；
    每个所述调节模块用于调节所述发送端和/或所述接收端的阻抗，以使得所述发送端和/或所述接收端的阻抗与对应的所述差分对的阻抗相匹配。
  12. 如权利要求11所述的显示装置，其中，所述调节模块靠近所述发送端和/或所述接收端设置，所述调节模块包括依次连接的检测单元、比较单元和调节单元；
    所述检测单元用于检测所述发送端和/或所述接收端的阻抗以及对应的所述差分对的阻抗；
    所述比较单元用于比较所述发送端和/或所述接收端与对应的所述差分对的阻抗之间的匹配关系；
    所述调节单元用于根据所述匹配关系，调节所述发送端和/或所述接收端的阻抗。
  13. 如权利要求12所述的显示装置，其中，所述“根据所述匹配关系，调节所述发送端和/或所述接收端的阻抗”，具体包括：
    若所述匹配关系为所述发送端和/或所述接收端的阻抗大于对应的所述差分对的阻抗，则将所述发送端和/或所述接收端的阻抗增大至对应的所述差分对的阻抗；
    若所述匹配关系为所述发送端和/或所述接收端的阻抗小于对应的所述差分对的阻抗，则将所述发送端和/或所述接收端的阻抗减小至对应的所述差分对的阻抗。
  14. 如权利要求13所述的显示装置，其中，每个所述差分对包括平行设置的第一信号线和第二信号线，所述调节单元包括两个第一可调电阻和两个第二可调电阻；
    两个所述第一可调电阻中的一个所述第一可调电阻串联于所述第一信号线上，另一个所述第一可调电阻串联于所述第二信号线上；两个所述第一可调电阻用于增大所述发送端和/或所述接收端的阻抗；
    两个所述第二可调电阻中的一个所述第二可调电阻的第一端与所述第一信号线连接，另一个所述第二可调电阻的第一端与所述第二信号线连接，两个所述第二可调电阻的第二端均接地；两个所述第二可调电阻用于减小所述发送端和/或所述接收端的阻抗。
  15. 如权利要求14所述的显示装置，其中，
    所述“将所述发送端和/或所述接收端的阻抗增大至对应的所述差分对的阻抗”，具体包括：根据所述发送端和/或所述接收端的阻抗与对应的所述差分对的阻抗之间的差值，增大两个所述第一可调电阻的电阻值，以使得所述发送端和/或所述接收端的阻抗增大至对应的所述差分对的阻抗；
    所述“将所述发送端和/或所述接收端的阻抗减小至对应的所述差分对的阻抗”，具体包括：根据所述发送端和/或所述接收端的阻抗与对应的所述差分对的阻抗之间的差值，增大两个所述第二可调电阻的电阻值，以使得所述发送端和/或所述接收端的阻抗减小至对应的所述差分对的阻抗。
  16. 如权利要求14所述的显示装置，其中，所述调节单元还包括第三可调电阻，所述第三可调电阻的第一端与所述第一信号线连接，所述第三可调电阻的第二端与所述第二信号线连接。
  17. 如权利要求16所述的显示装置，其中，所述第三可调电阻靠近所述发送端和/或所述接收端设置。
  18. 如权利要求14或16所述的显示装置，其中，所述调节单元还包括可编程电位器，所述可编程电位器分别与所述第一可调电阻、所述第二可调电阻和第三可调电阻连接，以用于调节所述第一可调电阻、所述第二可调电阻和第三可调电阻的电阻值。
  19. 如权利要求18所述的显示装置，其中，所述可编程电位器通过寄存器设置或外部信号赋值的方式调节所述第一可调电阻、所述第二可调电阻和所述第三可调电阻的电阻值。
  20. 如权利要求11所述的显示装置，其中，所述差分信号接口为低压差分信号接口、微型低压差分信号接口和VBO接口中的任意一种。
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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115547248B (zh) * 2022-01-18 2023-09-26 荣耀终端有限公司 显示驱动芯片、阻抗匹配方法及终端

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6545534B1 (en) * 2001-02-13 2003-04-08 Analog Devices, Inc. Low voltage variable gain amplifier with constant input impedance and adjustable one-pole filtering characteristic
CN101751902A (zh) * 2009-12-24 2010-06-23 北京时代民芯科技有限公司 一种带可调输入电阻的lvds接收电路
CN202931466U (zh) * 2012-11-01 2013-05-08 深圳Tcl新技术有限公司 Lvds输出调节装置及电视机
CN106604550A (zh) * 2016-12-16 2017-04-26 郑州云海信息技术有限公司 一种线路阻抗调节方法和系统
CN110827782A (zh) * 2019-11-27 2020-02-21 Tcl华星光电技术有限公司 一种驱动电路及液晶显示装置
CN111243552A (zh) * 2020-01-20 2020-06-05 Tcl华星光电技术有限公司 Vbo信号端口、控制板及电视机

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3828652B2 (ja) * 1998-01-09 2006-10-04 株式会社アドバンテスト 差動信号伝送回路
TW567459B (en) * 2002-10-22 2003-12-21 Hannstar Display Corp Driving chip, serial differential signal circuit, driving circuit of liquid crystal display, and method of receiving differential signal transmitted from bus
KR20080066107A (ko) * 2007-01-11 2008-07-16 삼성전자주식회사 표시 장치
KR100805510B1 (ko) * 2007-01-11 2008-02-20 삼성에스디아이 주식회사 차동 신호 전송 시스템 및 이를 구비한 평판표시장치
KR20080089868A (ko) * 2007-04-02 2008-10-08 삼성에스디아이 주식회사 차동 신호 전송 시스템 및 이를 구비한 평판표시장치
KR100846967B1 (ko) * 2007-04-02 2008-07-17 삼성에스디아이 주식회사 차동 신호 전송 시스템 및 이를 구비한 평판표시장치
JP2009122318A (ja) * 2007-11-14 2009-06-04 Hitachi Displays Ltd 表示装置
CN101527693A (zh) * 2008-03-05 2009-09-09 中兴通讯股份有限公司 差分传输线阻抗匹配及偏置补偿装置和方法
TWI603306B (zh) * 2016-11-11 2017-10-21 友達光電股份有限公司 面板驅動電路
CN108153694A (zh) * 2016-12-05 2018-06-12 电信科学技术研究院 差分接口电路的端接电阻匹配电路及端接电阻匹配方法
CN107045861B (zh) * 2017-03-24 2020-06-26 惠科股份有限公司 差分信号传输电路和显示装置
CN209374035U (zh) * 2019-02-22 2019-09-10 上海和辉光电有限公司 一种高速差动讯号电路和测试系统

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6545534B1 (en) * 2001-02-13 2003-04-08 Analog Devices, Inc. Low voltage variable gain amplifier with constant input impedance and adjustable one-pole filtering characteristic
CN101751902A (zh) * 2009-12-24 2010-06-23 北京时代民芯科技有限公司 一种带可调输入电阻的lvds接收电路
CN202931466U (zh) * 2012-11-01 2013-05-08 深圳Tcl新技术有限公司 Lvds输出调节装置及电视机
CN106604550A (zh) * 2016-12-16 2017-04-26 郑州云海信息技术有限公司 一种线路阻抗调节方法和系统
CN110827782A (zh) * 2019-11-27 2020-02-21 Tcl华星光电技术有限公司 一种驱动电路及液晶显示装置
CN111243552A (zh) * 2020-01-20 2020-06-05 Tcl华星光电技术有限公司 Vbo信号端口、控制板及电视机

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