WO2013159421A1 - 液晶显示模组差分信号接收终端异常的检测方法及装置 - Google Patents

液晶显示模组差分信号接收终端异常的检测方法及装置 Download PDF

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Publication number
WO2013159421A1
WO2013159421A1 PCT/CN2012/076088 CN2012076088W WO2013159421A1 WO 2013159421 A1 WO2013159421 A1 WO 2013159421A1 CN 2012076088 W CN2012076088 W CN 2012076088W WO 2013159421 A1 WO2013159421 A1 WO 2013159421A1
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Prior art keywords
differential signal
signal lines
group
signal line
high level
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PCT/CN2012/076088
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English (en)
French (fr)
Inventor
谭小平
王念茂
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深圳市华星光电技术有限公司
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Priority to US13/574,845 priority Critical patent/US8907695B2/en
Publication of WO2013159421A1 publication Critical patent/WO2013159421A1/zh

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    • 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
    • G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections

Definitions

  • the present invention relates to the field of liquid crystal display technology, and in particular, to a method and a device for detecting an abnormality of a differential signal receiving terminal of a liquid crystal display module.
  • Liquid crystal display (Liquid Crystal Display, LCD) is a flat panel display device that uses the characteristics of liquid crystal materials to display images (Flat Panel) Display, FPD), which has the advantages of light weight, low driving voltage and low power consumption compared to other display devices, has become the mainstream product in the entire consumer market.
  • the liquid crystal panel determines the brightness, contrast, color, and viewing angle of the liquid crystal display to a large extent.
  • the quality of all liquid crystal panels directly affects the quality of the liquid crystal display.
  • the differential signal generator In the conventional driving method of the liquid crystal panel, the differential signal generator generally transmits a differential signal to the liquid crystal panel through the cable.
  • the liquid crystal module control substrate has the following problems in the production of the patch or in the assembly test of the liquid crystal module: the differential termination resistor is open, the differential signals are shorted to each other, and the abnormal power is transmitted. Timing causes the differential signal to short to ground or to a short to the power supply.
  • the main object of the present invention is to provide a method for detecting an abnormality of a differential signal receiving terminal of a liquid crystal display module, which aims to quickly detect an abnormal condition of a differential signal receiving terminal.
  • the present invention provides a method for detecting an abnormality of a differential signal receiving terminal of a liquid crystal display module, the receiving terminal comprising a first set of differential signal lines LVDS0+, LVDS0- and a second set of differential signal lines LVDS1+, LVDS1-, the detecting method includes :
  • the LVDS0+, LVDS0-, LVDS1+, and LVDS1- input high levels are sequentially input, and only one differential signal line is input to a high level at a time, and the remaining differential signal line inputs are in a high impedance state;
  • the abnormality includes open circuit of the differential signal line, open circuit between the two sets of differential signal lines, and abnormal power transmission timing to cause difference
  • the signal line is shorted to ground or shorted to the power supply.
  • the feedback signals received after the LVDS0+, LVDS0-, LVDS1+, and LVDS1- input high levels are sequentially HHHH, HHHH, HHHH, and HHHH, it is determined that the abnormal condition is that the two adjacent differential signal lines are short-circuited with each other. ;
  • the feedback signals received after sequentially inputting the LVDS0+, LVDS0-, LVDS1+, and LVDS1-levels are LLLL, LLLL, LLHH, and LLHH, it is determined that the abnormal condition is that the first group of differential signal lines are short-circuited to the ground;
  • the feedback signals received after the LVDS0+, LVDS0-, LVDS1+, and LVDS1- input high levels are sequentially HHLL, HHLL, HHHH, and HHHH, it is determined that the abnormality is that the first group of differential signal lines are short-circuited to the power supply.
  • the feedback signals received after sequentially inputting LVDS0+, LVDS0-, LVDS1+, and LVDS1-level to high level are HLLL, LHLL, LLHH, and LLHH, it is determined that the abnormal condition is that the first group of differential signal line termination resistors are open.
  • the feedback signals received after the LVDS0+, LVDS0-, LVDS1+, and LVDS1- input high levels are sequentially HHHH, LHHH, LHHH, and LHHH, it is determined that the abnormal condition is that the two adjacent differential signal lines are short-circuited with each other.
  • the first group of differential signal line termination resistors open and the first group of differential signal lines are shorted to the power supply.
  • the feedback signals received after the LVDS0+, LVDS0-, LVDS1+, and LVDS1- input high levels are sequentially LLLL, LLLL, LLLL, and LLLL, it is determined that the abnormal condition is that the two adjacent differential signal lines are short-circuited with each other. And the first set of differential signal lines are shorted to ground.
  • the abnormal condition is determined as the first group of differential signal line termination resistors open and the first The group differential signal line is shorted to the power supply;
  • the abnormal condition is determined as the first group of differential signal line termination resistors and the first group of differential signals.
  • the line is shorted to ground.
  • the feedback signals received after sequentially inputting LVDS0+, LVDS0-, LVDS1+, and LVDS1-levels are HLLL, LHHH, LHHH, and LHHH, it is determined that the abnormal condition is that the two adjacent differential signal lines are short-circuited with each other. And the first group of differential signal line termination resistors are open.
  • the abnormal condition is that the two adjacent differential signal lines are short-circuited with each other.
  • the first group of differential signal line termination resistors are open and the first group of differential signal lines are shorted to ground.
  • the invention also provides a method for detecting an abnormality of a differential signal receiving terminal of a liquid crystal display module, comprising the following steps:
  • Two sets of adjacent differential signal lines are used as detection units, and all differential signal lines in the detection unit are sequentially input with a high level, and only one differential signal line is input with a high level at a time, and the remaining differential signal lines are input high. Resistance state
  • the step of determining, according to the feedback signal, whether the differential signal line of the detecting unit is abnormal comprises:
  • the positive differential signal line of the first differential signal line is input to the high level, and the remaining differential signal line inputs are in the high impedance state, the feedback signals of all the differential signal lines received are high level, then it is judged that The negative differential signal line of the first differential signal line is input to a high level, and when the remaining differential signal line inputs are in a high impedance state, whether the feedback signals of all the differential signal lines received are high level;
  • the abnormal situation is that the two adjacent differential signal lines are short-circuited with each other, the first group of differential signal line termination resistors are open, and the first group of differential signal lines are short-circuited to the power source.
  • the step of determining, according to the feedback signal, whether the differential signal line of the detecting unit is abnormal comprises:
  • the positive differential signal line of the first differential signal line is input to the high level, and the remaining differential signal line inputs are in the high impedance state, the received feedback signal is all low level, then it is judged that the second group difference is sequentially given.
  • the positive and negative differential signal lines of the signal line are input to a high level, and when the remaining differential signal line inputs are in a high impedance state, whether the feedback signals of the received positive differential signal lines of the second group are both at a high level;
  • the abnormal situation is that the two adjacent differential signal lines are short-circuited to each other and the first group of differential signal lines are short-circuited to the ground.
  • the step of determining, according to the feedback signal, whether the differential signal line of the detecting unit is abnormal comprises:
  • the feedback signals of the received first differential signal line are both high level and second.
  • the feedback signals of the differential signal lines of the group are all low level, it is judged that the positive and negative differential signal lines of the second group of differential signal lines are sequentially input to the high level, and the remaining differential signal lines are input in the high impedance state, and the received signals are received. Whether the feedback signals of all differential signal lines are high level;
  • the abnormal condition is determined to include the first set of differential signal line termination resistors open and the first set of differential signal lines shorted to the power supply.
  • the step of determining, according to the feedback signal, whether the differential signal line receiving terminal of the detecting unit is abnormal is specifically:
  • the feedback signal of the positive differential signal line of the received first differential signal line is high.
  • the feedback signals of the flat and remaining differential signal lines are all low level, it is judged that when the negative differential signal line of the first group of differential signal lines is input to a high level, and the remaining differential signal line inputs are in a high impedance state,
  • the abnormal condition is that the first group of differential signal line terminal resistances are open;
  • the feedback signal of the positive differential signal line of the first group of differential signal lines is low level, and the feedback signals of the remaining differential signal lines are all high level, it is determined that the abnormal situation is that the two adjacent differential signal lines are short-circuited with each other and The first set of differential signal line termination resistors are open;
  • the received signals are received.
  • the feedback signal of the positive differential signal line of the second group of differential signal lines is at a high level, it is determined that the abnormal condition is that the first group of differential signal line termination resistors are open and the first group of differential signal lines are shorted to ground;
  • the received signals are received.
  • the abnormal condition is determined as short circuit between two adjacent differential signal lines, the first group of differential signal line terminal resistance open circuits and the first group The differential signal line is shorted to ground.
  • the invention further provides a detecting device for abnormality of a differential signal receiving terminal of a liquid crystal display module, comprising:
  • the signal issuance module takes two sets of adjacent differential signal lines as detection units, sequentially inputs high levels to all differential signal lines in the detection unit, and inputs a high level to only one differential signal line at a time, and the remaining differential signals
  • the line input is in a high impedance state
  • the abnormality determining module receives the feedback signals of all the differential signal lines, and determines whether the differential signal lines of the detecting unit are abnormal according to the feedback signals.
  • the abnormality determining module specifically includes:
  • the first determining unit if a high level is input to the positive differential signal line of the first group of differential signal lines, and the remaining differential signal lines are in a high impedance state, the feedback signals of all the differential signal lines received are high level , it is judged that when the negative differential signal line of the first group of differential signal lines is input to a high level, and the remaining differential signal line inputs are in a high resistance state, whether the feedback signals of all the differential signal lines received are high level;
  • the abnormal situation is that the two adjacent differential signal lines are short-circuited with each other, the first group of differential signal line termination resistors are open, and the first group of differential signal lines are short-circuited to the power source.
  • the abnormality determining module further includes:
  • the second judging unit if a high level is input to the positive differential signal line of the first group of differential signal lines, and the remaining differential signal lines are in a high impedance state, the received feedback signals are all low level, then the judgment is in turn When the positive and negative differential signal lines of the second group of differential signal lines are input to a high level, and the remaining differential signal line inputs are in a high impedance state, whether the feedback signals of the received second positive differential signal lines are at a high level ;
  • the abnormal situation is that the two adjacent differential signal lines are short-circuited to each other and the first group of differential signal lines are short-circuited to the ground.
  • the abnormality determining module further includes:
  • the third determining unit if the high-resistance state is input to the positive differential signal line of the first differential signal line, and the feedback signals of the first differential signal line received are high The level and the feedback signals of the second group of differential signal lines are all low level, then it is determined that the positive and negative differential signal lines of the second group of differential signal lines are sequentially input to the high level, and the remaining differential signal line inputs are high impedance. In the state, whether the feedback signals of all the differential signal lines received are high level;
  • the abnormal condition is determined to include the first set of differential signal line termination resistors open and the first set of differential signal lines shorted to the power supply.
  • the abnormality determining module further includes:
  • the fourth determining unit if the positive differential signal line of the first group of differential signal lines is input to a high level, and the remaining differential signal line inputs are in a high impedance state, the positive differential signal lines of the received first group of differential signal lines are When the feedback signal is high level and the feedback signals of the remaining differential signal lines are all low level, it is judged that the negative differential signal line of the first group of differential signal lines is input with a high level, and the remaining differential signal line inputs are in a high impedance state. Time,
  • the abnormal condition is that the first group of differential signal line terminal resistances are open;
  • the feedback signal of the positive differential signal line of the first group of differential signal lines is low level, and the feedback signals of the remaining differential signal lines are all high level, it is determined that the abnormal situation is that the two adjacent differential signal lines are short-circuited with each other and The first set of differential signal line termination resistors are open;
  • the received signals are received.
  • the feedback signal of the positive differential signal line of the second group of differential signal lines is at a high level, it is determined that the abnormal condition is that the first group of differential signal line termination resistors are open and the first group of differential signal lines are shorted to ground;
  • the received signals are received.
  • the abnormal condition is determined as short circuit between two adjacent differential signal lines, the first group of differential signal line terminal resistance open circuits and the first group The differential signal line is shorted to ground.
  • the invention sequentially inputs the high level to the differential signal line, and then receives the feedback signal of each differential signal line, so that the abnormality of the differential signal line receiving terminal of the liquid crystal display module can be quickly detected according to the feedback signal, without Need to manually detect, which not only saves labor costs and time costs, but also further improves the detection efficiency of abnormalities.
  • FIG. 1 is a schematic flow chart of a preferred embodiment of a method for detecting an abnormality of a differential signal receiving terminal of a liquid crystal display module of the present invention
  • FIG. 2 is a schematic flow chart of the first embodiment of the abnormality determination according to the feedback signal in the method for detecting an abnormality of the differential signal receiving terminal of the liquid crystal display module of the present invention
  • FIG. 3 is a schematic diagram showing the detection result of the differential signal receiving terminal of the liquid crystal display module of the present invention as a short circuit between two adjacent differential signal lines;
  • FIG. 4 is a diagram showing the abnormality of the differential signal receiving terminal of the liquid crystal display module of the present invention, the mutual short circuit between two sets of adjacent differential signal lines, the open circuit of the first group of differential signal lines, and the short circuit of the first group of differential signal lines. Summary of results;
  • FIG. 5 is a schematic flow chart of a second embodiment of abnormality determination according to a feedback signal in a method for detecting an abnormality of a differential signal receiving terminal of a liquid crystal display module of the present invention
  • FIG. 6 is a schematic diagram showing the detection result of the differential signal receiving terminal of the liquid crystal display module of the present invention being the short circuit of the first group of differential signal lines to the ground;
  • FIG. 7 is a schematic diagram showing the detection result of the differential signal receiving terminal of the liquid crystal display module of the present invention as a short circuit between two adjacent differential signal lines and a short circuit of the first group of differential signal lines to the ground;
  • FIG. 8 is a schematic flow chart of a third embodiment of abnormality determination according to a feedback signal in a method for detecting an abnormality of a differential signal receiving terminal of a liquid crystal display module according to the present invention
  • FIG. 9 is a schematic diagram showing the detection result of the differential signal receiving terminal of the liquid crystal display module of the present invention as a result of short-circuiting the first group of differential signal lines to the power supply;
  • FIG. 10 is a schematic diagram showing the detection result of the differential signal receiving terminal of the liquid crystal display module of the present invention as the first group of differential signal line terminal resistance open circuit and the first group of differential signal line short circuit power supply;
  • FIG. 11 is a schematic flow chart of a fourth embodiment of abnormality determination according to a feedback signal in a method for detecting an abnormality of a differential signal receiving terminal of a liquid crystal display module according to the present invention
  • FIG. 12 is a schematic diagram showing the detection result of the differential signal receiving terminal of the liquid crystal display module of the present invention as an open circuit of the first group of differential signal line terminals;
  • FIG. 13 is a schematic diagram showing the abnormality of the differential signal receiving terminal of the liquid crystal display module of the present invention as a result of short circuit between two adjacent differential signal lines and open circuit of the first group of differential signal lines;
  • FIG. 14 is a schematic diagram showing the detection result of the differential signal receiving terminal of the liquid crystal display module of the present invention as a first group of differential signal line termination resistance open circuit and the first group of differential signal line short to ground;
  • 15 is a diagram showing that the abnormality of the differential signal receiving terminal of the liquid crystal display module of the present invention is that the two sets of adjacent differential signal lines are short-circuited with each other, the first group of differential signal line terminations are open, and the first group of differential signal lines are shorted to ground. Summary of results;
  • 16 is a schematic structural diagram of a preferred embodiment of a device for detecting an abnormality of a differential signal line receiving terminal of a liquid crystal display module of the present invention
  • FIG. 17 is a schematic structural diagram of a first embodiment of an abnormality determining module in a detecting device for an abnormality of a differential signal receiving terminal of a liquid crystal display module of the present invention
  • FIG. 18 is a schematic structural diagram of a second embodiment of an abnormality determining module in a detecting device for an abnormality of a differential signal receiving terminal of a liquid crystal display module of the present invention
  • FIG. 19 is a schematic structural diagram of a third embodiment of an abnormality determining module in a detecting device for an abnormality of a differential signal receiving terminal of a liquid crystal display module according to the present invention.
  • Fig. 20 is a block diagram showing the fourth embodiment of the abnormality determining module in the detecting device for the abnormality of the differential signal receiving terminal of the liquid crystal display module of the present invention.
  • the differential signal receiving terminal of the liquid crystal display module includes a plurality of sets of differential signal receiving ends, and can receive multiple differential signals at the same time. In this embodiment, only two sets of differential signal receiving ends are taken as an example.
  • a method for detecting an abnormality of a differential signal receiving terminal of a liquid crystal display module includes the following steps:
  • Step S01 sequentially inputting a high level to all the differential signal lines, and inputting a high level to only one differential signal line at a time, and the remaining differential signal line inputs are in a high impedance state;
  • Step S02 Receive feedback signals of all differential signal lines, and determine, according to the feedback signal, whether the differential signal line receiving terminal is abnormal.
  • the differential signal receiving terminal of the liquid crystal display module comprises a first set of differential signal lines LVDS0 and a second set of differential signal lines LVDS1, wherein the first set of differential signal lines LVDS0 comprises a positive differential signal line LVDS0+ and a negative differential signal line LVDS0-, similarly
  • the second group of differential signal lines LVDS1 includes a positive differential signal line LVDS1+ and a negative differential signal line LVDS1-.
  • the abnormality of the receiving terminal mainly includes the open circuit of the differential signal line, the short circuit between the two sets of differential signal lines, the abnormal power transmission timing, the short circuit of the differential signal line to the ground or the short circuit of the power supply.
  • two sets of differential signal lines have only one set of differential signal lines, and there is a differential signal line termination resistance open circuit, and an abnormal power transmission timing causes the differential signal line to be shorted to the ground or shorted to the power supply. Case. The feedback signals received in these cases are described below.
  • step S02 specifically includes:
  • Step S021a If a positive signal is input to the positive differential signal line of the first differential signal line, and the remaining differential signal lines are in a high impedance state, the feedback signals of all the differential signal lines received are high level. It is judged that when the negative differential signal line of the first group of differential signal lines is input to a high level, and the remaining differential signal line inputs are in a high impedance state, whether the feedback signals of all the differential signal lines received are high level; if yes, then Step S022a is performed; if not, step S023a is performed;
  • Step S022a determining that the abnormal condition is that the two adjacent differential signal lines are short-circuited with each other;
  • FIG. 3 it is a schematic diagram of the detection result of the differential signal receiving terminal of the liquid crystal display module being short-circuited between two adjacent differential signal lines.
  • the detecting device comprises a positive differential signal line output end of the first group of differential signal lines, a feedback end, a negative differential signal line output end of the first group of differential signal lines, a feedback end, and a positive differential signal line output end of the second group of differential signal lines. And the feedback end, the negative differential signal line output end and the feedback end of the second group of differential signal lines.
  • the positive and negative differential signal line output ends of the first group of differential signal lines of the detecting device are corresponding to the input signals of the differential signal line input terminals of the differential signal receiving terminal.
  • the positive and negative differential signal line feedback ends of the first group of differential signal lines of the detecting device are corresponding to the signals fed back by the differential signal receiving terminal.
  • the detection results are as follows: (where H represents a high level, L represents a low level, and Z represents a high resistance state)
  • the feedback signal received by the detecting device is HHHH;
  • the feedback signal received by the detecting device is HHHH;
  • the feedback signal received by the detecting device is HHHH;
  • the feedback signal received by the detection device is HHHH.
  • the abnormality can be determined first.
  • the two sets of differential signal lines are short-circuited to each other, and after the short-circuit abnormality is eliminated, it is detected whether there is a short circuit of the power supply.
  • Step S023a determining an abnormality that the two sets of adjacent differential signal lines are short-circuited with each other, the first group of differential signal line terminating resistors are open, and the first group of differential signal lines are short-circuited to the power source.
  • the abnormal condition of the differential signal receiving terminal of the liquid crystal display module is that the two adjacent differential signal lines are short-circuited with each other, the first group of differential signal line termination resistors are open, and the first group of differential signal lines are short-circuited to the power source.
  • the feedback signal received by the detecting device is HHHH;
  • the feedback signal received by the detecting device is LHHH;
  • the feedback signal received by the detecting device is LHHH;
  • the feedback signal received by the detection device is LHHH.
  • FIG. 5 it is a schematic flowchart of a second embodiment of abnormality determination according to a feedback signal in a method for detecting an abnormality of a differential signal receiving terminal of a liquid crystal display module according to the present invention.
  • the above step S02 specifically includes:
  • Step S021b If a positive level is input to the positive differential signal line of the first group of differential signal lines, and the remaining differential signal lines are in a high impedance state, the received feedback signals are all at a low level, and then the judgment is given to The positive and negative differential signal lines of the two sets of differential signal lines are input to a high level, and when the remaining differential signal line inputs are in a high impedance state, whether the feedback signals of the received positive differential signal lines of the second group are both at a high level; , step S022b is performed; if not, step S023b is performed;
  • Step S022b determining that the abnormal condition is that the first group of differential signal lines are short-circuited to the ground;
  • FIG. 6 it is a schematic diagram of the detection result of the differential signal receiving terminal of the liquid crystal display module being the short circuit of the first group of differential signal lines to the ground.
  • the test results are as follows:
  • the feedback signal received by the detecting device is LLLL;
  • the feedback signal received by the detecting device is LLLL;
  • the feedback signal received by the detecting device is LLHH;
  • the feedback signal received by the detection device is LLHH.
  • Step S023b determining that the abnormal condition is that the two adjacent differential signal lines are short-circuited with each other and the first group of differential signal lines are short-circuited to the ground.
  • FIG. 7 it is a schematic diagram of the abnormality of the differential signal receiving terminal of the liquid crystal display module, which is a short circuit between two adjacent differential signal lines and a short circuit of the first group of differential signal lines.
  • the test results are as follows:
  • the feedback signal received by the detecting device is LLLL;
  • the feedback signal received by the detecting device is LLLL;
  • the feedback signal received by the detecting device is LLLL;
  • the feedback signal received by the detecting device is LLLL.
  • FIG. 8 it is a schematic flowchart of a third embodiment of abnormality determination according to a feedback signal in a method for detecting an abnormality of a differential signal receiving terminal of a liquid crystal display module according to the present invention.
  • the above step S02 specifically includes:
  • Step S021c If a high level is input to the positive differential signal line of the first group of differential signal lines, and the remaining differential signal line inputs are in a high impedance state, the received feedback signals of the first group of differential signal lines are both high level.
  • the feedback signals of the second group of differential signal lines are all low level, then it is determined that the positive and negative differential signal lines of the second group of differential signal lines are sequentially input to the high level, and the remaining differential signal lines are input with high impedance. Whether the feedback signals of all the differential signal lines received are high level; if yes, step S022c is performed; if not, step S023c is performed;
  • Step S022c determining that the abnormal condition is that the first group of differential signal lines are short-circuited to the power source;
  • FIG. 9 it is a schematic diagram of a detection result of a differential signal receiving terminal of a liquid crystal display module being a short circuit of a first group of differential signal lines to a power supply.
  • the test results are as follows:
  • the feedback signal received by the detecting device is HHLL;
  • the feedback signal received by the detecting device is HHLL;
  • the feedback signal received by the detecting device is HHHH;
  • the feedback signal received by the detection device is HHHH.
  • Step S023c determining that the abnormal condition is that the first group of differential signal line termination resistors are open and the first group of differential signal lines are shorted to the power source.
  • FIG. 10 it is a schematic diagram of a detection result of a differential signal receiving terminal of a liquid crystal display module being a first group of differential signal line termination resistance open circuits and a first group of differential signal lines short circuit power supply.
  • the test results are as follows:
  • the feedback signal received by the detecting device is HHLL;
  • the feedback signal received by the detecting device is LHLL
  • the feedback signal received by the detecting device is LHHH;
  • the feedback signal received by the detection device is LHHH.
  • FIG. 11 is a flow chart showing a fourth embodiment of abnormality determination according to a feedback signal in a method for detecting an abnormality of a differential signal receiving terminal of a liquid crystal display module according to the present invention.
  • the above step S02 specifically includes:
  • Step S021d If a positive signal is input to the positive differential signal line of the first differential signal line, and the remaining differential signal lines are in a high impedance state, the feedback signal of the positive differential signal line of the received first differential signal line is received. When the feedback signal of the other differential signal lines is at a high level, it is determined that when the negative differential signal line of the first group of differential signal lines is input to a high level, and the remaining differential signal line inputs are in a high impedance state,
  • Step S022d If the feedback signal of the negative differential signal line of the first group of differential signal lines is at a high level, and the feedback signals of the remaining differential signal lines are all at a low level, the abnormal condition is determined as a first group of differential signal line termination resistors. open circuit;
  • FIG. 12 it is a schematic diagram of the detection result of the differential signal receiving terminal of the liquid crystal display module being the open circuit of the first group of differential signal line terminals.
  • the test results are as follows:
  • the feedback signal received by the detecting device is HLLL;
  • the feedback signal received by the detecting device is LHLL
  • the feedback signal received by the detecting device is LLHH;
  • the feedback signal received by the detection device is LLHH.
  • Step S023d If the feedback signal of the positive differential signal line of the first group of differential signal lines is low level, and the feedback signals of the remaining differential signal lines are all high level, the abnormal condition is determined as two sets of adjacent differential signal lines. Short circuit between each other and open circuit of the first group of differential signal lines;
  • FIG. 13 it is a schematic diagram of a detection result of a differential signal receiving terminal of a liquid crystal display module as a short circuit between two adjacent differential signal lines and an open circuit of a first group of differential signal line terminals.
  • the test results are as follows:
  • the feedback signal received by the detecting device is HLLL;
  • the feedback signal received by the detecting device is LHHH;
  • the feedback signal received by the detecting device is LHHH;
  • the feedback signal received by the detection device is LHHH.
  • Step S024d If all the feedback signals are at a low level, and the positive and negative differential signal lines of the second group of differential signal lines are sequentially input to a high level, and the remaining differential signal lines are input in a high impedance state, the received signals are received.
  • the feedback signal of the positive differential signal line of the second group of differential signal lines is at a high level, it is determined that the abnormal condition is that the first group of differential signal line termination resistors are open and the first group of differential signal lines are shorted to ground;
  • FIG. 14 it is a schematic diagram of the detection result of the differential signal receiving terminal of the liquid crystal display module being the open circuit of the first group of differential signal lines and the short circuit of the first group of differential signal lines.
  • the test results are as follows:
  • the feedback signal received by the detecting device is HLLL;
  • the feedback signal received by the detecting device is LLLL;
  • the feedback signal received by the detecting device is LLHH;
  • the feedback signal received by the detection device is LLHH.
  • Step S025d If the feedback signals of all the differential signal lines are all low level, and the positive and negative differential signal lines of the second group of differential signal lines are sequentially input to the high level, and the remaining differential signal line inputs are in a high impedance state.
  • the feedback signal of the positive differential signal line of the received second group of differential signal lines is a low level, and the abnormal condition is determined as a short circuit between two adjacent differential signal lines, and the first group of differential signal line termination resistors are open and The first set of differential signal lines are shorted to ground.
  • the abnormal condition of the differential signal receiving terminal of the liquid crystal display module is that the two sets of adjacent differential signal lines are short-circuited with each other, the first group of differential signal line termination resistors are open, and the first group of differential signal lines are short-circuited to the ground.
  • the feedback signal received by the detecting device is HLLL;
  • the feedback signal received by the detecting device is LLLL;
  • the feedback signal received by the detecting device is LLLL;
  • the feedback signal received by the detecting device is LLLL.
  • the invention sequentially inputs the high level to the differential signal line, and then receives the feedback signal of each differential signal line, so that the abnormality of the differential signal line receiving terminal of the liquid crystal display module can be quickly detected according to the feedback signal, without Need to manually detect, which not only saves labor costs and time costs, but also further improves the detection efficiency of abnormalities.
  • the same method can be used. Moreover, by the above method, the abnormal position of the differential signal line can also be detected, thereby making the processing of the abnormality more convenient.
  • the liquid crystal display module differential signal line receiving terminal includes a plurality of sets of differential signal lines, for example, three groups.
  • the first group and the second group of differential signal lines may be used as the detecting unit, and the differential signal line receiving terminal of the detecting unit is detected to be abnormal by referring to the above method; and then the second group of differential signal lines and the third group of differential signals are further detected.
  • the line is a detecting unit, and the differential signal line receiving terminal of the detecting unit is further detected by referring to the above method. In this way, it is possible to detect differential signal lines of all liquid crystal display modules.
  • FIG. 16 is a schematic structural diagram of a preferred embodiment of a device for detecting an abnormality of a differential signal receiving terminal of a liquid crystal display module according to the present invention.
  • the apparatus for detecting abnormality of the differential signal receiving terminal of the liquid crystal display module of the embodiment further includes:
  • the signal issuing module 10 uses two sets of adjacent differential signal lines as detection units, sequentially inputs high levels to all differential signal lines in the detecting unit, and inputs a high level to only one differential signal line at a time, and the remaining differences are
  • the signal line input is in a high impedance state;
  • the abnormality determining module 20 receives the feedback signals of all the differential signal lines, and determines whether the differential signal lines of the detecting unit are abnormal according to the feedback signals.
  • the information sending module 10 may be a signal generator, for example, generating four signals, wherein each signal generates only one high level, and the remaining signals are in a high impedance state.
  • the signal issuing module 10 is connected to the liquid crystal display module differential signal line receiving terminal.
  • the information sending module 10 may be only a transmission device, one end of which is connected to an external device (signal generator), and the other end is connected to a differential signal line receiving terminal of the liquid crystal display module, and the external device is connected.
  • Four signals will be generated, each of which generates only one high level each time the signal is generated, and the remaining signals are in a high impedance state.
  • the abnormality determining module 20 receives the feedback signals of all the differential signal lines, and then performs abnormality determination according to the feedback signals. It should be noted here that the feedback signal includes multiple groups, and the number thereof is consistent with the number of differential signal lines. The abnormality determination module 20 determines the abnormality after the reception of each of the differential signal lines is completed.
  • the invention sequentially inputs the high level to the differential signal line, and then receives the feedback signal of each differential signal line, so that the abnormality of the differential signal line receiving terminal of the liquid crystal display module can be quickly detected according to the feedback signal, without Need to manually detect, which not only saves labor costs and time costs, but also further improves the detection efficiency of abnormalities.
  • FIG. 17 is a schematic structural diagram of a first embodiment of an abnormality determining module in a detecting device for an abnormality of a differential signal receiving terminal of a liquid crystal display module of the present invention.
  • the abnormality determining module 20 specifically includes:
  • the first judging unit 21 if the high-resistance state is input to the positive differential signal line of the first group of differential signal lines, and the feedback signals of all the differential signal lines received are high-powered. Ping, it is judged that when the negative differential signal line of the first group of differential signal lines is input to a high level, and the remaining differential signal line inputs are in a high resistance state, whether the feedback signals of all the differential signal lines received are high level;
  • the abnormal situation is that the two adjacent differential signal lines are short-circuited with each other, the first group of differential signal line termination resistors are open, and the first group of differential signal lines are short-circuited to the power source.
  • FIG. 18 is a schematic structural diagram of a second embodiment of an abnormality determining module in a detecting device for a differential signal receiving terminal abnormality of a liquid crystal display module according to the present invention.
  • the abnormality determining module 20 further includes:
  • the second determining unit 22 if a high level is input to the positive differential signal line of the first group of differential signal lines, and the remaining differential signal lines are in a high impedance state, the received feedback signals are all low level, then the judgment is
  • the positive and negative differential signal lines of the second group of differential signal lines are sequentially input to a high level, and when the remaining differential signal line inputs are in a high impedance state, whether the feedback signals of the received second positive differential signal lines are equal or high level;
  • the abnormal situation is that the two adjacent differential signal lines are short-circuited to each other and the first group of differential signal lines are short-circuited to the ground.
  • FIG. 19 is a schematic structural diagram of a third embodiment of an abnormality determining module in a detecting device for a differential signal receiving terminal abnormality of a liquid crystal display module according to the present invention.
  • the abnormality determining module 20 further includes:
  • the third determining unit 23 if a high level is input to the positive differential signal line of the first group of differential signal lines, and the remaining differential signal line inputs are in a high impedance state, the received feedback signals of the first group of differential signal lines are all The high level and the feedback signals of the second group of differential signal lines are all low level, then it is judged that the positive and negative differential signal lines of the second group of differential signal lines are sequentially input to the high level, and the remaining differential signal line inputs are high. In the resistance state, whether the feedback signals of all the differential signal lines received are high level;
  • the abnormal condition is determined to include the first set of differential signal line termination resistors open and the first set of differential signal lines shorted to the power supply.
  • FIG. 20 is a schematic structural diagram of a fourth embodiment of an abnormality determining module in a device for detecting an abnormality of a differential signal receiving terminal of a liquid crystal display module according to the present invention.
  • the abnormality determining module 20 further includes:
  • the fourth judging unit 24 if the high-resistance state is input to the positive differential signal line of the first group of differential signal lines, and the positive differential signal lines of the first group of differential signal lines received are received The feedback signal is high level, and the feedback signals of the remaining differential signal lines are all low level, then it is judged that the negative differential signal line of the first group of differential signal lines is input with a high level, and the remaining differential signal line inputs are high impedance. State,
  • the abnormal condition is that the first group of differential signal line terminal resistances are open;
  • the feedback signal of the positive differential signal line of the first group of differential signal lines is low level, and the feedback signals of the remaining differential signal lines are all high level, it is determined that the abnormal situation is that the two adjacent differential signal lines are short-circuited with each other and The first set of differential signal line termination resistors are open;
  • the received signals are received.
  • the feedback signal of the positive differential signal line of the second group of differential signal lines is at a high level, it is determined that the abnormal condition is that the first group of differential signal line termination resistors are open and the first group of differential signal lines are shorted to ground;
  • the received signals are received.
  • the abnormal condition is determined as short circuit between two adjacent differential signal lines, the first group of differential signal line terminal resistance open circuits and the first group The differential signal line is shorted to ground.

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Abstract

本发明公开液晶显示模组差分信号接收终端异常的检测方法，所述检测方法包括：依次给LVDS0+、LVDS0-、LVDS1+、LVDS1-输入高电平，且每次仅给一条差分信号线输入高电平，其余的差分信号线输入呈高阻状态；接收所有差分信号线的反馈信号，并根据反馈信号判断检测单元的差分信号是否异常，该异常包括差分信号线终端电阻开路、两组差分信号线之间相互短路、不正常的送电时序导致差分信号线对地短路或对电源短路。本发明通过依次给差分信号线输入高电平，再接收每条差分信号线的反馈信号，从而根据该反馈信号即可实现对接收终端异常进行快速地检测，既节约了人力成本和时间成本，而且进一步提高了异常的检测效率。

Description

液晶显示模组差分信号接收终端异常的检测方法及装置
技术领域
本发明涉及液晶显示技术领域，尤其涉及一种液晶显示模组差分信号接收终端异常的检测方法及装置。
背景技术
液晶显示器（Liquid Crystal Display，LCD）是利用液晶材料的特性来显示图像的一种平板显示装置（Flat Panel Display，FPD），其相较于其他显示装置而言具轻薄、低驱动电压及低功耗等优点，已经成为整个消费市场上的主流产品。而液晶面板又在很大程度上决定液晶显示器的亮度、对比度、色彩、可视角度，所有液晶面板的质量直接影响液晶显示器的质量。
现有的液晶面板的驱动方式，一般都是由差分信号发生器通过电缆给液晶面板传送差分信号。但是在液晶面板的制作过程中，经常发现液晶模组控制基板在贴片生产或在液晶模组组装测试过程中出现如下问题：差分终端电阻开路、差分信号之间相互短路、不正常的送电时序导致差分信号对地短路或对电源短路。
上述问题中，虽然差分终端电阻开路、差分信号之间相互短路可以由测试人员通过放大镜检查，但是其成本较高，而且效率还不高。因此，亟需一种能快速检测上述问题的检测方法。
发明内容
本发明的主要目的是提供一种液晶显示模组差分信号接收终端异常的检测方法，旨在快速检测差分信号接收终端的异常情况。
本发明提供了一种液晶显示模组差分信号接收终端异常的检测方法，该接收终端包括第一组差分信号线LVDS0+、LVDS0-及第二组差分信号线LVDS1+、LVDS1-，所述检测方法包括：
依次给LVDS0+、LVDS0-、LVDS1+、LVDS1-输入高电平，且每次仅给一条差分信号线输入高电平，其余的差分信号线输入呈高阻状态；
接收所有差分信号线的反馈信号，并根据反馈信号判断检测单元的差分信号是否异常，该异常包括差分信号线终端电阻开路、两组差分信号线之间相互短路、不正常的送电时序导致差分信号线对地短路或对电源短路。
优选地，若依次给LVDS0+、LVDS0-、LVDS1+、LVDS1-输入高电平后接收的反馈信号为HHHH、HHHH、HHHH、HHHH，则判断异常情况为两组相邻的差分信号线之间相互短路；
优选地，若依次给LVDS0+、LVDS0-、LVDS1+、LVDS1-输入高电平后接收的反馈信号为LLLL、LLLL、LLHH、LLHH，则判断异常情况为第一组差分信号线对地短路；
若依次给LVDS0+、LVDS0-、LVDS1+、LVDS1-输入高电平后接收的反馈信号为HHLL、HHLL、HHHH、HHHH，则判断异常情况为第一组差分信号线对电源短路。
优选地，若依次给LVDS0+、LVDS0-、LVDS1+、LVDS1-输入高电平后接收的反馈信号为HLLL、LHLL、LLHH、LLHH，则判断异常情况为第一组差分信号线终端电阻开路。
优选地，若依次给LVDS0+、LVDS0-、LVDS1+、LVDS1-输入高电平后接收的反馈信号为HHHH、LHHH、LHHH、LHHH，则判断异常情况为两组相邻的差分信号线之间相互短路、第一组差分信号线终端电阻开路及第一组差分信号线对电源短路。
优选地，若依次给LVDS0+、LVDS0-、LVDS1+、LVDS1-输入高电平后接收的反馈信号为LLLL、LLLL、LLLL、LLLL，则判断异常情况为两组相邻的差分信号线之间相互短路及第一组差分信号线对地短路。
优选地，若依次给LVDS0+、LVDS0-、LVDS1+、LVDS1-输入高电平后接收的反馈信号为HHLL、LHLL、LHHH、LHHH，则判断异常情况为第一组差分信号线终端电阻开路及第一组差分信号线对电源短路；
若依次给LVDS0+、LVDS0-、LVDS1+、LVDS1-输入高电平后接收的反馈信号为HLLL、LLLL、LLHH、LLHH，则判断异常情况为第一组差分信号线终端电阻开路及第一组差分信号线对地短路。
优选地，若依次给LVDS0+、LVDS0-、LVDS1+、LVDS1-输入高电平后接收的反馈信号为HLLL、LHHH、LHHH、LHHH，则判断异常情况为两组相邻的差分信号线之间相互短路及第一组差分信号线终端电阻开路。
优选地，若依次给LVDS0+、LVDS0-、LVDS1+、LVDS1-输入高电平后接收的反馈信号为HLLL、LLLL、LLLL、LLLL，则判断异常情况为两组相邻的差分信号线之间相互短路、第一组差分信号线终端电阻开路及第一组差分信号线对地短路。
本发明还提供了一种液晶显示模组差分信号接收终端异常的检测方法，包括以下步骤：
以两组相邻的差分信号线为检测单元，给检测单元中所有的差分信号线依次输入高电平，且每次仅给一条差分信号线输入高电平，其余的差分信号线输入呈高阻状态；
接收所有差分信号线的反馈信号，并根据所述反馈信号判断检测单元的差分信号线是否异常。
优选地，所述根据反馈信号判断检测单元的差分信号线是否异常的步骤具体包括：
若在给第一组差分信号线的正差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的所有差分信号线的反馈信号均为高电平，则判断在给第一组差分信号线的负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的所有差分信号线的反馈信号是否均为高电平；
若是，则判断异常情况为两组相邻的差分信号线之间相互短路；
若否，则判断异常情况为两组相邻的差分信号线之间相互短路、第一组差分信号线终端电阻开路及第一组差分信号线对电源短路。
优选地，所述根据反馈信号判断检测单元的差分信号线是否异常的步骤具体包括：
若在给第一组差分信号线的正差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的反馈信号均为低电平，则判断在依次给第二组差分信号线的正、负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的第二组的正差分信号线的反馈信号是否为均高电平；
若是，则判断异常情况为第一组差分信号线对地短路；
若否，则判断异常情况为两组相邻的差分信号线之间相互短路及第一组差分信号线对地短路。
优选地，所述根据反馈信号判断检测单元的差分信号线是否异常的步骤具体包括：
若在给第一组差分信号线的正差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的第一组差分信号线的反馈信号均为高电平、第二组差分信号线的反馈信号均为低电平，则判断在依次给第二组差分信号线的正、负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的所有差分信号线的反馈信号是否均为高电平；
若是，则判断异常情况为第一组差分信号线对电源短路；
若否，则判断异常情况包括第一组差分信号线终端电阻开路及第一组差分信号线对电源短路。
优选地，所述根据反馈信号判断检测单元的差分信号线接收终端是否异常的步骤具体包括：
若在给第一组差分信号线的正差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的第一组差分信号线的正差分信号线的反馈信号为高电平、其余差分信号线的反馈信号均为低电平，则判断在给第一组差分信号线的负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，
若第一组差分信号线的负差分信号线的反馈信号为高电平，其余的差分信号线的反馈信号均为低电平，则判断异常情况为第一组差分信号线终端电阻开路；
若第一组差分信号线的正差分信号线的反馈信号为低电平，其余的差分信号线的反馈信号均为高电平，则判断异常情况为两组相邻的差分信号线相互短路及第一组差分信号线终端电阻开路；
若所有差分信号线的反馈信号均为低电平、且在依次给第二组差分信号线的正、负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的第二组差分信号线的正差分信号线的反馈信号为高电平，则判断异常情况为第一组差分信号线终端电阻开路及第一组差分信号线对地短路；
若所有差分信号线的反馈信号均为低电平、且在依次给第二组差分信号线的正、负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的第二组差分信号线的正差分信号线的反馈信号为低电平，则判断异常情况为两组相邻的差分信号线之间相互短路、第一组差分信号线终端电阻开路及第一组差分信号线对地短路。
本发明又提供了一种液晶显示模组差分信号接收终端异常的检测装置，包括：
信号发出模块，以两组相邻的差分信号线为检测单元，给检测单元中所有的差分信号线依次输入高电平，且每次仅给一条差分信号线输入高电平，其余的差分信号线输入呈高阻状态；
异常判断模块，接收所有差分信号线的反馈信号，并根据所述反馈信号判断检测单元的差分信号线是否异常。
优选地，所述异常判断模块具体包括：
第一判断单元，若在给第一组差分信号线的正差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的所有差分信号线的反馈信号均为高电平，则判断在给第一组差分信号线的负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的所有差分信号线的反馈信号是否均为高电平；
若是，则判断异常情况为两组相邻的差分信号线之间相互短路；
若否，则判断异常情况为两组相邻的差分信号线之间相互短路、第一组差分信号线终端电阻开路及第一组差分信号线对电源短路。
优选地，所述异常判断模块还包括：
第二判断单元，若在给第一组差分信号线的正差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的反馈信号均为低电平，则判断在依次给第二组差分信号线的正、负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的第二组的正差分信号线的反馈信号是否为均高电平；
若是，则判断异常情况为第一组差分信号线对地短路；
若否，则判断异常情况为两组相邻的差分信号线之间相互短路及第一组差分信号线对地短路。
优选地，所述异常判断模块还包括：
第三判断单元，若在给第一组差分信号线的正差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的第一组差分信号线的反馈信号均为高电平、第二组差分信号线的反馈信号均为低电平，则判断在依次给第二组差分信号线的正、负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的所有差分信号线的反馈信号是否均为高电平；
若是，则判断异常情况为第一组差分信号线对电源短路；
若否，则判断异常情况包括第一组差分信号线终端电阻开路及第一组差分信号线对电源短路。
优选地，所述异常判断模块还包括：
第四判断单元，若在给第一组差分信号线的正差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的第一组差分信号线的正差分信号线的反馈信号为高电平、其余差分信号线的反馈信号均为低电平，则判断在给第一组差分信号线的负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，
若第一组差分信号线的负差分信号线的反馈信号为高电平，其余的差分信号线的反馈信号均为低电平，则判断异常情况为第一组差分信号线终端电阻开路；
若第一组差分信号线的正差分信号线的反馈信号为低电平，其余的差分信号线的反馈信号均为高电平，则判断异常情况为两组相邻的差分信号线相互短路及第一组差分信号线终端电阻开路；
若所有差分信号线的反馈信号均为低电平、且在依次给第二组差分信号线的正、负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的第二组差分信号线的正差分信号线的反馈信号为高电平，则判断异常情况为第一组差分信号线终端电阻开路及第一组差分信号线对地短路；
若所有差分信号线的反馈信号均为低电平、且在依次给第二组差分信号线的正、负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的第二组差分信号线的正差分信号线的反馈信号为低电平，则判断异常情况为两组相邻的差分信号线之间相互短路、第一组差分信号线终端电阻开路及第一组差分信号线对地短路。
本发明通过依次给差分信号线输入高电平，再接收每条差分信号线的反馈信号，从而根据该反馈信号即可实现对液晶显示模组差分信号线接收终端异常进行快速地检测，而不再需要通过人工检测，既节约了人力成本和时间成本，而且进一步提高了异常的检测效率。
附图说明
图1是本发明液晶显示模组差分信号接收终端异常的检测方法较佳实施例的流程示意图；
图2是本发明液晶显示模组差分信号接收终端异常的检测方法中根据反馈信号进行异常判断第一实施例的流程示意图；
图3是本发明液晶显示模组差分信号接收终端异常情况为两组相邻的差分信号线之间相互短路的检测结果示意图；
图4是本发明液晶显示模组差分信号接收终端异常情况为两组相邻的差分信号线之间相互短路、第一组差分信号线终端电阻开路及第一组差分信号线对电源短路的检测结果示意图；
图5是本发明液晶显示模组差分信号接收终端异常的检测方法中根据反馈信号进行异常判断第二实施例的流程示意图；
图6是本发明液晶显示模组差分信号接收终端异常情况为第一组差分信号线对地短路的检测结果示意图；
图7是本发明液晶显示模组差分信号接收终端异常情况为两组相邻的差分信号线之间相互短路及第一组差分信号线对地短路的检测结果示意图；
图8是本发明液晶显示模组差分信号接收终端异常的检测方法中根据反馈信号进行异常判断第三实施例的流程示意图；
图9是本发明液晶显示模组差分信号接收终端异常情况为第一组差分信号线对电源短路的检测结果示意图；
图10是本发明液晶显示模组差分信号接收终端异常情况为第一组差分信号线终端电阻开路及第一组差分信号线对电源短路的检测结果示意图；
图11是本发明液晶显示模组差分信号接收终端异常的检测方法中根据反馈信号进行异常判断第四实施例的流程示意图；
图12是本发明液晶显示模组差分信号接收终端异常情况为第一组差分信号线终端电阻开路的检测结果示意图；
图13是本发明液晶显示模组差分信号接收终端异常情况为两组相邻的差分信号线之间相互短路及第一组差分信号线终端电阻开路的检测结果示意图；
图14是本发明液晶显示模组差分信号接收终端异常情况为第一组差分信号线终端电阻开路及第一组差分信号线对地短路的检测结果示意图；
图15是本发明液晶显示模组差分信号接收终端异常情况为两组相邻的差分信号线之间相互短路、第一组差分信号线终端电阻开路及第一组差分信号线对地短路的检测结果示意图；
图16是本发明液晶显示模组差分信号线接收终端异常的检测装置较佳实施例的结构示意图；
图17是本发明液晶显示模组差分信号接收终端异常的检测装置中异常判断模块第一实施例的结构示意图；
图18是本发明液晶显示模组差分信号接收终端异常的检测装置中异常判断模块第二实施例的结构示意图；
图19是本发明液晶显示模组差分信号接收终端异常的检测装置中异常判断模块第三实施例的结构示意图；
图20是本发明液晶显示模组差分信号接收终端异常的检测装置中异常判断模块第四实施例的结构示意图。
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
以下将结合附图及实施例，对实现发明目的的技术方案作详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
图1是本发明液晶显示模组差分信号接收终端异常的检测方法较佳实施例的流程示意图。本发明中液晶显示模组差分信号接收终端包括多组差分信号接收端，可以同时接收多路差分信号，本实施例仅以两组差分信号接收端为例。
参照图1，本发明实施例一种液晶显示模组差分信号接收终端异常的检测方法，包括以下步骤：
步骤S01、给所有的差分信号线依次输入高电平，且每次仅给一条差分信号线输入高电平，其余的差分信号线输入呈高阻状态；
步骤S02、接收所有差分信号线的反馈信号，并根据所述反馈信号判断差分信号线接收终端是否异常。
上述液晶显示模组差分信号接收终端包括第一组差分信号线LVDS0及第二组差分信号线LVDS1，其中第一组差分信号线LVDS0包括正差分信号线LVDS0+及负差分信号线LVDS0-，同理，第二组差分信号线LVDS1包括正差分信号线LVDS1+及负差分信号线LVDS1-。
通过依次给差分信号线输入高电平，其余差分信号线输入呈高阻状态，再根据所有差分信号线的反馈信号，就可以判断出接收终端是否异常。一般接收终端的异常主要包括差分信号线终端电阻开路、两组差分信号线之间相互短路、不正常的送电时序导致差分信号线对地短路或对电源短路四种。在这里需要说明的是，本发明实施例中两组差分信号线，为仅有一组差分信号线存在差分信号线终端电阻开路、不正常的送电时序导致差分信号线对地短路或对电源短路的情况。下面分别就这几种情况下接收的反馈信号进行相应的描述。
参照图2，其为本发明液晶显示模组差分信号接收终端异常的检测方法中根据反馈信号进行异常判断第一实施例的流程示意图。上述步骤S02具体包括：
步骤S021a、若在给第一组差分信号线的正差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的所有差分信号线的反馈信号均为高电平，则判断在给第一组差分信号线的负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的所有差分信号线的反馈信号是否均为高电平；若是，则执行步骤S022a；若否，则执行步骤S023a；
步骤S022a、判断异常情况为两组相邻的差分信号线之间相互短路；
参照图3，其为液晶显示模组差分信号接收终端异常情况为两组相邻的差分信号线之间相互短路的检测结果示意图。检测装置包括第一组差分信号线的正差分信号线输出端、反馈端，第一组差分信号线的负差分信号线输出端、反馈端，第二组差分信号线的正差分信号线输出端、反馈端，第二组差分信号线的负差分信号线输出端、反馈端。通过检测装置的第一组差分信号线的正、负差分信号线输出端，第二组差分信号线的正、负差分信号线输出端对应向差分信号接收终端的差分信号线输入端输入信号，同时通过检测装置的第一组差分信号线的正、负差分信号线反馈端，第二组差分信号线的正、负差分信号线反馈端对应接收差分信号接收终端反馈的信号。其检测结果如下所示：（其中，H代表高电平，L代表低电平，Z代表高阻状态）
LVDS0+输入高电平、LVDS0-、LVDS1+及LVDS1-均呈高阻状态时，检测装置所接收的反馈信号为HHHH；
LVDS0-输入高电平、LVDS0+、LVDS1+及LVDS1-均呈高阻状态时，检测装置所接收的反馈信号为HHHH；
LVDS1+输入高电平、LVDS0+、LVDS0-及LVDS1-均呈高阻状态时，检测装置所接收的反馈信号为HHHH；
LVDS1-输入高电平、LVDS0+、LVDS0-及LVDS1+均呈高阻状态时，检测装置所接收的反馈信号为HHHH。
在这里需要说明的是，由于第一组差分信号线对电源短路时接收的反馈信号与两组差分信号线之间相互短路时接收的反馈信号一致，因此，一般情况下可以先判断异常情况为两组差分信号线之间相互短路，待该短路异常消除后，再检测其是否存在电源短路。当然，也可以先判断异常情况为第一组差分信号线对电源短路，待该电源短路异常消除后，再检测其是否存在两组差分信号线之间相互短路。
步骤S023a、判断异常情况为两组相邻的差分信号线之间相互短路、第一组差分信号线终端电阻开路及第一组差分信号线对电源短路。
参照图4，其为液晶显示模组差分信号接收终端异常情况为两组相邻的差分信号线之间相互短路、第一组差分信号线终端电阻开路及第一组差分信号线对电源短路的检测结果示意图。其检测结果如下所示：
LVDS0+输入高电平、LVDS0-、LVDS1+及LVDS1-均呈高阻状态时，检测装置所接收的反馈信号为HHHH；
LVDS0-输入高电平、LVDS0+、LVDS1+及LVDS1-均呈高阻状态时，检测装置所接收的反馈信号为LHHH；
LVDS1+输入高电平、LVDS0+、LVDS0-及LVDS1-均呈高阻状态时，检测装置所接收的反馈信号为LHHH；
LVDS1-输入高电平、LVDS0+、LVDS0-及LVDS1+均呈高阻状态时，检测装置所接收的反馈信号为LHHH。
参照图5，其为本发明液晶显示模组差分信号接收终端异常的检测方法中根据反馈信号进行异常判断第二实施例的流程示意图。上述步骤S02具体还包括：
步骤S021b、若在给第一组差分信号线的正差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的反馈信号均为低电平，则判断在依次给第二组差分信号线的正、负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的第二组的正差分信号线的反馈信号是否为均高电平；若是，则执行步骤S022b；若否，则执行步骤S023b；
步骤S022b、判断异常情况为第一组差分信号线对地短路；
参照图6，其为液晶显示模组差分信号接收终端异常情况为第一组差分信号线对地短路的检测结果示意图。其检测结果如下所示：
LVDS0+输入高电平、LVDS0-、LVDS1+及LVDS1-均呈高阻状态时，检测装置所接收的反馈信号为LLLL；
LVDS0-输入高电平、LVDS0+、LVDS1+及LVDS1-均呈高阻状态时，检测装置所接收的反馈信号为LLLL；
LVDS1+输入高电平、LVDS0+、LVDS0-及LVDS1-均呈高阻状态时，检测装置所接收的反馈信号为LLHH；
LVDS1-输入高电平、LVDS0+、LVDS0-及LVDS1+均呈高阻状态时，检测装置所接收的反馈信号为LLHH。
步骤S023b、判断异常情况为两组相邻的差分信号线之间相互短路及第一组差分信号线对地短路。
参照图7，其为液晶显示模组差分信号接收终端异常情况为两组相邻的差分信号线之间相互短路及第一组差分信号线对地短路的检测结果示意图。其检测结果如下所示：
LVDS0+输入高电平、LVDS0-、LVDS1+及LVDS1-均呈高阻状态时，检测装置所接收的反馈信号为LLLL；
LVDS0-输入高电平、LVDS0+、LVDS1+及LVDS1-均呈高阻状态时，检测装置所接收的反馈信号为LLLL；
LVDS1+输入高电平、LVDS0+、LVDS0-及LVDS1-均呈高阻状态时，检测装置所接收的反馈信号为LLLL；
LVDS1-输入高电平、LVDS0+、LVDS0-及LVDS1+均呈高阻状态时，检测装置所接收的反馈信号为LLLL。
参照图8，其为本发明液晶显示模组差分信号接收终端异常的检测方法中根据反馈信号进行异常判断第三实施例的流程示意图。上述步骤S02具体包括：
步骤S021c、若在给第一组差分信号线的正差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的第一组差分信号线的反馈信号均为高电平、第二组差分信号线的反馈信号均为低电平，则判断在依次给第二组差分信号线的正、负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的所有差分信号线的反馈信号是否均为高电平；若是，则执行步骤S022c；若否，则执行步骤S023c；
步骤S022c、判断异常情况为第一组差分信号线对电源短路；
参照图9，其为液晶显示模组差分信号接收终端异常情况为第一组差分信号线对电源短路的检测结果示意图。其检测结果如下所示：
LVDS0+输入高电平、LVDS0-、LVDS1+及LVDS1-均呈高阻状态时，检测装置所接收的反馈信号为HHLL；
LVDS0-输入高电平、LVDS0+、LVDS1+及LVDS1-均呈高阻状态时，检测装置所接收的反馈信号为HHLL；
LVDS1+输入高电平、LVDS0+、LVDS0-及LVDS1-均呈高阻状态时，检测装置所接收的反馈信号为HHHH；
LVDS1-输入高电平、LVDS0+、LVDS0-及LVDS1+均呈高阻状态时，检测装置所接收的反馈信号为HHHH。
步骤S023c、判断异常情况为第一组差分信号线终端电阻开路及第一组差分信号线对电源短路。
参照图10，其为液晶显示模组差分信号接收终端异常情况为第一组差分信号线终端电阻开路及第一组差分信号线对电源短路的检测结果示意图。其检测结果如下所示：
LVDS0+输入高电平、LVDS0-、LVDS1+及LVDS1-均呈高阻状态时，检测装置所接收的反馈信号为HHLL；
LVDS0-输入高电平、LVDS0+、LVDS1+及LVDS1-均呈高阻状态时，检测装置所接收的反馈信号为LHLL；
LVDS1+输入高电平、LVDS0+、LVDS0-及LVDS1-均呈高阻状态时，检测装置所接收的反馈信号为LHHH；
LVDS1-输入高电平、LVDS0+、LVDS0-及LVDS1+均呈高阻状态时，检测装置所接收的反馈信号为LHHH。
参照图11，为本发明液晶显示模组差分信号接收终端异常的检测方法中根据反馈信号进行异常判断第四实施例的流程示意图。上述步骤S02具体还包括：
步骤S021d、若在给第一组差分信号线的正差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的第一组差分信号线的正差分信号线的反馈信号为高电平、其余差分信号线的反馈信号均低电平，则判断在给第一组差分信号线的负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，
步骤S022d、若第一组差分信号线的负差分信号线的反馈信号为高电平，其余的差分信号线的反馈信号均为低电平，则判断异常情况为第一组差分信号线终端电阻开路；
参照图12，其为液晶显示模组差分信号接收终端异常情况为第一组差分信号线终端电阻开路的检测结果示意图。其检测结果如下所示：
LVDS0+输入高电平、LVDS0-、LVDS1+及LVDS1-均呈高阻状态时，检测装置所接收的反馈信号为HLLL；
LVDS0-输入高电平、LVDS0+、LVDS1+及LVDS1-均呈高阻状态时，检测装置所接收的反馈信号为LHLL；
LVDS1+输入高电平、LVDS0+、LVDS0-及LVDS1-均呈高阻状态时，检测装置所接收的反馈信号为LLHH；
LVDS1-输入高电平、LVDS0+、LVDS0-及LVDS1+均呈高阻状态时，检测装置所接收的反馈信号为LLHH。
步骤S023d、若第一组差分信号线的正差分信号线的反馈信号为低电平，其余的差分信号线的反馈信号均为高电平，则判断异常情况为两组相邻的差分信号线之间相互短路及第一组差分信号线终端电阻开路；
参照图13，其为液晶显示模组差分信号接收终端异常情况为两组相邻的差分信号线之间相互短路及第一组差分信号线终端电阻开路的检测结果示意图。其检测结果如下所示：
LVDS0+输入高电平、LVDS0-、LVDS1+及LVDS1-均呈高阻状态时，检测装置所接收的反馈信号为HLLL；
LVDS0-输入高电平、LVDS0+、LVDS1+及LVDS1-均呈高阻状态时，检测装置所接收的反馈信号为LHHH；
LVDS1+输入高电平、LVDS0+、LVDS0-及LVDS1-均呈高阻状态时，检测装置所接收的反馈信号为LHHH；
LVDS1-输入高电平、LVDS0+、LVDS0-及LVDS1+均呈高阻状态时，检测装置所接收的反馈信号为LHHH。
步骤S024d、若所有的反馈信号均为低电平、且在依次给第二组差分信号线的正、负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的第二组差分信号线的正差分信号线的反馈信号为高电平，则判断异常情况为第一组差分信号线终端电阻开路及第一组差分信号线对地短路；
参照图14，其为液晶显示模组差分信号接收终端异常情况为第一组差分信号线终端电阻开路及第一组差分信号线对地短路的检测结果示意图。其检测结果如下所示：
LVDS0+输入高电平、LVDS0-、LVDS1+及LVDS1-均呈高阻状态时，检测装置所接收的反馈信号为HLLL；
LVDS0-输入高电平、LVDS0+、LVDS1+及LVDS1-均呈高阻状态时，检测装置所接收的反馈信号为LLLL；
LVDS1+输入高电平、LVDS0+、LVDS0-及LVDS1-均呈高阻状态时，检测装置所接收的反馈信号为LLHH；
LVDS1-输入高电平、LVDS0+、LVDS0-及LVDS1+均呈高阻状态时，检测装置所接收的反馈信号为LLHH。
步骤S025d、若所有差分信号线的反馈信号均为低电平、且在依次给第二组差分信号线的正、负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的第二组差分信号线的正差分信号线的反馈信号为低电平，则判断异常情况为两组相邻的差分信号线之间相互短路、第一组差分信号线终端电阻开路及第一组差分信号线对地短路。
参照图15，其为液晶显示模组差分信号接收终端异常情况为两组相邻的差分信号线之间相互短路、第一组差分信号线终端电阻开路及第一组差分信号线对地短路的检测结果示意图。其检测结果如下所示：
LVDS0+输入高电平、LVDS0-、LVDS1+及LVDS1-均呈高阻状态时，检测装置所接收的反馈信号为HLLL；
LVDS0-输入高电平、LVDS0+、LVDS1+及LVDS1-均呈高阻状态时，检测装置所接收的反馈信号为LLLL；
LVDS1+输入高电平、LVDS0+、LVDS0-及LVDS1-均呈高阻状态时，检测装置所接收的反馈信号为LLLL；
LVDS1-输入高电平、LVDS0+、LVDS0-及LVDS1+均呈高阻状态时，检测装置所接收的反馈信号为LLLL。
本发明通过依次给差分信号线输入高电平，再接收每条差分信号线的反馈信号，从而根据该反馈信号即可实现对液晶显示模组差分信号线接收终端异常进行快速地检测，而不再需要通过人工检测，既节约了人力成本和时间成本，而且进一步提高了异常的检测效率。
在这里需要说明的是，若需要检测第二组差分信号线是否终端电阻开路、是否对地短路或对电源短路，都可以使用同样的方法完成。而且，通过上述方法，还可以检测出差分信号线的异常位置，从而使得异常的处理更加方便。
另外，若该液晶显示模组差分信号线接收终端包括多组差分信号线，例如三组。则可以先以第一组与第二组差分信号线为检测单元，参照上述方法检测该检测单元的差分信号线接收终端是否有异常；然后再以第二组差分信号线与第三组差分信号线为检测单元，参照上述方法再检测该检测单元的差分信号线接收终端是否有异常。如此，则可以实现对所有的液晶显示模组差分信号线进行检测。
图16是本发明一种液晶显示模组差分信号接收终端异常的检测装置较佳实施例的结构示意图。
参照图16，该实施例液晶显示模组差分信号接收终端异常的检测装置还包括：
信号发出模块10，以两组相邻的差分信号线为检测单元，给检测单元中所有的差分信号线依次输入高电平，且每次仅给一条差分信号线输入高电平，其余的差分信号线输入呈高阻状态；
异常判断模块20，接收所有差分信号线的反馈信号，并根据所述反馈信号判断检测单元的差分信号线是否异常。
在本发明一实施方式中，上述信息发出模块10可以为一信号发生器，例如，产生四路信号，其中每次信号产生时仅产生一个高电平，其余的信号均呈高阻状态。该信号发出模块10与液晶显示模组差分信号线接收终端对应连接。在本发明另一实施方式中，上述信息发出模块10可以仅为传输装置，其一端与外界设备（信号发生器）连接，另一端与液晶显示模组差分信号线接收终端对应连接，该外界设备将产生四路信号，其中每次信号产生时仅产生一个高电平，其余的信号均呈高阻状态。
然后，上述异常判断模块20接收所有差分信号线的反馈信号，再根据该反馈信号进行异常判断。在这里需要说明的是，该反馈信号包括多组，其数量与差分信号线的数量一致。上述异常判断模块20在各组差分信号线都接收结束后，再进行异常情况的判断。
本发明通过依次给差分信号线输入高电平，再接收每条差分信号线的反馈信号，从而根据该反馈信号即可实现对液晶显示模组差分信号线接收终端异常进行快速地检测，而不再需要通过人工检测，既节约了人力成本和时间成本，而且进一步提高了异常的检测效率。
参照图17，其为本发明液晶显示模组差分信号接收终端异常的检测装置中异常判断模块第一实施例的结构示意图。上述异常判断模块20具体包括：
第一判断单元21，若在给第一组差分信号线的正差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的所有差分信号线的反馈信号均为高电平，则判断在给第一组差分信号线的负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的所有差分信号线的反馈信号是否均为高电平；
若是，则判断异常情况为两组相邻的差分信号线之间相互短路；
若否，则判断异常情况为两组相邻的差分信号线之间相互短路、第一组差分信号线终端电阻开路及第一组差分信号线对电源短路。
参照图18，其为本发明液晶显示模组差分信号接收终端异常的检测装置中异常判断模块第二实施例的结构示意图。上述异常判断模块20还包括：
第二判断单元22，若在给第一组差分信号线的正差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的反馈信号均为低电平，则判断在依次给第二组差分信号线的正、负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的第二组的正差分信号线的反馈信号是否为均高电平；
若是，则判断异常情况为第一组差分信号线对地短路；
若否，则判断异常情况为两组相邻的差分信号线之间相互短路及第一组差分信号线对地短路。
参照图19，其为本发明液晶显示模组差分信号接收终端异常的检测装置中异常判断模块第三实施例的结构示意图。上述异常判断模块20还包括：
第三判断单元23，若在给第一组差分信号线的正差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的第一组差分信号线的反馈信号均为高电平、第二组差分信号线的反馈信号均为低电平，则判断在依次给第二组差分信号线的正、负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的所有差分信号线的反馈信号是否均为高电平；
若是，则判断异常情况为第一组差分信号线对电源短路；
若否，则判断异常情况包括第一组差分信号线终端电阻开路及第一组差分信号线对电源短路。
参照图20，其为本发明液晶显示模组差分信号接收终端异常的检测装置中异常判断模块第四实施例的结构示意图。上述异常判断模块20还包括：
第四判断单元24，若在给第一组差分信号线的正差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的第一组差分信号线的正差分信号线的反馈信号为高电平、其余差分信号线的反馈信号均为低电平，则判断在给第一组差分信号线的负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，
若第一组差分信号线的负差分信号线的反馈信号为高电平，其余的差分信号线的反馈信号均为低电平，则判断异常情况为第一组差分信号线终端电阻开路；
若第一组差分信号线的正差分信号线的反馈信号为低电平，其余的差分信号线的反馈信号均为高电平，则判断异常情况为两组相邻的差分信号线相互短路及第一组差分信号线终端电阻开路；
若所有差分信号线的反馈信号均为低电平、且在依次给第二组差分信号线的正、负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的第二组差分信号线的正差分信号线的反馈信号为高电平，则判断异常情况为第一组差分信号线终端电阻开路及第一组差分信号线对地短路；
若所有差分信号线的反馈信号均为低电平、且在依次给第二组差分信号线的正、负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的第二组差分信号线的正差分信号线的反馈信号为低电平，则判断异常情况为两组相邻的差分信号线之间相互短路、第一组差分信号线终端电阻开路及第一组差分信号线对地短路。
以上所述仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (19)

  1. 一种液晶显示模组差分信号接收终端异常的检测方法，其特征在于，该接收终端包括第一组差分信号线LVDS0+、LVDS0-及第二组差分信号线LVDS1+、LVDS1-，该检测方法包括： 依次给LVDS0+、LVDS0-、LVDS1+、LVDS1-输入高电平，且每次仅给一条差分信号线输入高电平，其余的差分信号线输入呈高阻状态； 接收所有差分信号线的反馈信号，并根据反馈信号判断检测单元的差分信号是否异常，该异常包括差分信号线终端电阻开路、两组差分信号线之间相互短路、不正常的送电时序导致差分信号线对地短路或对电源短路。
  2. 根据权利要求1所述的液晶显示模组差分信号接收终端异常的检测方法，其特征在于，若依次给LVDS0+、LVDS0-、LVDS1+、LVDS1-输入高电平后接收的反馈信号为HHHH、HHHH、HHHH、HHHH，则判断异常情况为两组相邻的差分信号线之间相互短路。
  3. 据权利要求1所述的液晶显示模组差分信号接收终端异常的检测方法，其特征在于，若依次给LVDS0+、LVDS0-、LVDS1+、LVDS1-输入高电平后接收的反馈信号为LLLL、LLLL、LLHH、LLHH，则判断异常情况为第一组差分信号线对地短路；
    若依次给LVDS0+、LVDS0-、LVDS1+、LVDS1-输入高电平后接收的反馈信号为HHLL、HHLL、HHHH、HHHH，则判断异常情况为第一组差分信号线对电源短路。
  4. 根据权利要求1所述的液晶显示模组差分信号接收终端异常的检测方法，其特征在于，若依次给LVDS0+、LVDS0-、LVDS1+、LVDS1-输入高电平后接收的反馈信号为HLLL、LHLL、LLHH、LLHH，则判断异常情况为第一组差分信号线终端电阻开路。
  5. 根据权利要求1所述的液晶显示模组差分信号接收终端异常的检测方法，其特征在于，若依次给LVDS0+、LVDS0-、LVDS1+、LVDS1-输入高电平后接收的反馈信号为HHHH、LHHH、LHHH、LHHH，则判断异常情况为两组相邻的差分信号线之间相互短路、第一组差分信号线终端电阻开路及第一组差分信号线对电源短路。
  6. 根据权利要求1所述的液晶显示模组差分信号接收终端异常的检测方法，其特征在于，若依次给LVDS0+、LVDS0-、LVDS1+、LVDS1-输入高电平后接收的反馈信号为LLLL、LLLL、LLLL、LLLL，则判断异常情况为两组相邻的差分信号线之间相互短路及第一组差分信号线对地短路。
  7. 据权利要求1所述的液晶显示模组差分信号接收终端异常的检测方法，其特征在于，若依次给LVDS0+、LVDS0-、LVDS1+、LVDS1-输入高电平后接收的反馈信号为HHLL、LHLL、LHHH、LHHH，则判断异常情况为第一组差分信号线终端电阻开路及第一组差分信号线对电源短路； 若依次给LVDS0+、LVDS0-、LVDS1+、LVDS1-输入高电平后接收的反馈信号为HLLL、LLLL、LLHH、LLHH，则判断异常情况为第一组差分信号线终端电阻开路及第一组差分信号线对地短路。
  8. 根据权利要求1所述的液晶显示模组差分信号接收终端异常的检测方法，其特征在于，若依次给LVDS0+、LVDS0-、LVDS1+、LVDS1-输入高电平后接收的反馈信号为HLLL、LHHH、LHHH、LHHH，则判断异常情况为两组相邻的差分信号线之间相互短路及第一组差分信号线终端电阻开路。
  9. 根据权利要求1所述的液晶显示模组差分信号接收终端异常的检测方法，其特征在于，若依次给LVDS0+、LVDS0-、LVDS1+、LVDS1-输入高电平后接收的反馈信号为HLLL、LLLL、LLLL、LLLL，则判断异常情况为两组相邻的差分信号线之间相互短路、第一组差分信号线终端电阻开路及第一组差分信号线对地短路。
  10. 一种液晶显示模组差分信号接收终端异常的检测方法，其特征在于，包括以下步骤： 以两组相邻的差分信号线为检测单元，给检测单元中所有的差分信号线依次输入高电平，且每次仅给一条差分信号线输入高电平，其余的差分信号线输入呈高阻状态； 接收所有差分信号线的反馈信号，并根据所述反馈信号判断检测单元的差分信号线是否异常。
  11. 根据权利要求10所述的液晶显示模组差分信号接收终端异常的检测方法，其特征在于，所述根据反馈信号判断检测单元的差分信号线是否异常的步骤具体包括： 若在给第一组差分信号线的正差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的所有差分信号线的反馈信号均为高电平，则判断在给第一组差分信号线的负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的所有差分信号线的反馈信号是否均为高电平；
    若是，则判断异常情况为两组相邻的差分信号线之间相互短路； 若否，则判断异常情况为两组相邻的差分信号线之间相互短路、第一组差分信号线终端电阻开路及第一组差分信号线对电源短路。
  12. 根据权利要求10所述的液晶显示模组差分信号接收终端异常的检测方法，其特征在于，所述根据反馈信号判断检测单元的差分信号线是否异常的步骤具体包括： 若在给第一组差分信号线的正差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的反馈信号均为低电平，则判断在依次给第二组差分信号线的正、负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的第二组的正差分信号线的反馈信号是否为均高电平；
    若是，则判断异常情况为第一组差分信号线对地短路；
    若否，则判断异常情况为两组相邻的差分信号线之间相互短路及第一组差分信号线对地短路。
  13. 根据权利要求10所述的液晶显示模组差分信号接收终端异常的检测方法，其特征在于，所述根据反馈信号判断检测单元的差分信号线是否异常的步骤具体包括： 若在给第一组差分信号线的正差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的第一组差分信号线的反馈信号均为高电平、第二组差分信号线的反馈信号均为低电平，则判断在依次给第二组差分信号线的正、负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的所有差分信号线的反馈信号是否均为高电平；
    若是，则判断异常情况为第一组差分信号线对电源短路；
    若否，则判断异常情况包括第一组差分信号线终端电阻开路及第一组差分信号线对电源短路。
  14. 根据权利要求10所述的液晶显示模组差分信号接收终端异常的检测方法，其特征在于，所述根据反馈信号判断检测单元的差分信号线接收终端是否异常的步骤具体包括： 若在给第一组差分信号线的正差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的第一组差分信号线的正差分信号线的反馈信号为高电平、其余差分信号线的反馈信号均为低电平，则判断在给第一组差分信号线的负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时， 若第一组差分信号线的负差分信号线的反馈信号为高电平，其余的差分信号线的反馈信号均为低电平，则判断异常情况为第一组差分信号线终端电阻开路； 若第一组差分信号线的正差分信号线的反馈信号为低电平，其余的差分信号线的反馈信号均为高电平，则判断异常情况为两组相邻的差分信号线相互短路及第一组差分信号线终端电阻开路； 若所有差分信号线的反馈信号均为低电平、且在依次给第二组差分信号线的正、负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的第二组差分信号线的正差分信号线的反馈信号为高电平，则判断异常情况为第一组差分信号线终端电阻开路及第一组差分信号线对地短路； 若所有差分信号线的反馈信号均为低电平、且在依次给第二组差分信号线的正、负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的第二组差分信号线的正差分信号线的反馈信号为低电平，则判断异常情况为两组相邻的差分信号线之间相互短路、第一组差分信号线终端电阻开路及第一组差分信号线对地短路。
  15. 一种液晶显示模组差分信号接收终端异常的检测装置，其特征在于，包括： 信号发出模块，以两组相邻的差分信号线为检测单元，给检测单元中所有的差分信号线依次输入高电平，且每次仅给一条差分信号线输入高电平，其余的差分信号线输入呈高阻状态； 异常判断模块，接收所有差分信号线的反馈信号，并根据所述反馈信号判断检测单元的差分信号线是否异常。
  16. 根据权利要求15所述的液晶显示模组差分信号接收终端异常的检测装置，其特征在于，所述异常判断模块具体包括： 第一判断单元，若在给第一组差分信号线的正差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的所有差分信号线的反馈信号均为高电平，则判断在给第一组差分信号线的负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的所有差分信号线的反馈信号是否均为高电平；
    若是，则判断异常情况为两组相邻的差分信号线之间相互短路；
    若否，则判断异常情况为两组相邻的差分信号线之间相互短路、第一组差分信号线终端电阻开路及第一组差分信号线对电源短路。
  17. 根据权利要求15所述的液晶显示模组差分信号接收终端异常的检测装置，其特征在于，所述异常判断模块还包括： 第二判断单元，若在给第一组差分信号线的正差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的反馈信号均为低电平，则判断在依次给第二组差分信号线的正、负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的第二组的正差分信号线的反馈信号是否为均高电平；
    若是，则判断异常情况为第一组差分信号线对地短路；
    若否，则判断异常情况为两组相邻的差分信号线之间相互短路及第一组差分信号线对地短路。
  18. 根据权利要求15所述的液晶显示模块差分信号接收终端异常的检测装置，其特征在于，所述异常判断模块还包括：
    第三判断单元，若在给第一组差分信号线的正差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的第一组差分信号线的反馈信号均为高电平、第二组差分信号线的反馈信号均为低电平，则判断在依次给第二组差分信号线的正、负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的所有差分信号线的反馈信号是否均为高电平；
    若是，则判断异常情况为第一组差分信号线对电源短路；
    若否，则判断异常情况包括第一组差分信号线终端电阻开路及第一组差分信号线对电源短路。
  19. 根据权利要求15所述的液晶显示模组差分信号接收终端异常的检测装置，其特征在于，所述异常判断模块还包括：
    第四判断单元，若在给第一组差分信号线的正差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的第一组差分信号线的正差分信号线的反馈信号为高电平、其余差分信号线的反馈信号均为低电平，则判断在给第一组差分信号线的负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时， 若第一组差分信号线的负差分信号线的反馈信号为高电平，其余的差分信号线的反馈信号均为低电平，则判断异常情况为第一组差分信号线终端电阻开路； 若第一组差分信号线的正差分信号线的反馈信号为低电平，其余的差分信号线的反馈信号均为高电平，则判断异常情况为两组相邻的差分信号线相互短路及第一组差分信号线终端电阻开路； 若所有差分信号线的反馈信号均为低电平、且在依次给第二组差分信号线的正、负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的第二组差分信号线的正差分信号线的反馈信号为高电平，则判断异常情况为第一组差分信号线终端电阻开路及第一组差分信号线对地短路； 若所有差分信号线的反馈信号均为低电平、且在依次给第二组差分信号线的正、负差分信号线输入高电平，其余的差分信号线输入呈高阻状态时，接收的第二组差分信号线的正差分信号线的反馈信号为低电平，则判断异常情况为两组相邻的差分信号线之间相互短路、第一组差分信号线终端电阻开路及第一组差分信号线对地短路。
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