CN108226759B - Line fault detection method and device for non-display area of display panel - Google Patents
Line fault detection method and device for non-display area of display panel Download PDFInfo
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- CN108226759B CN108226759B CN201810215290.XA CN201810215290A CN108226759B CN 108226759 B CN108226759 B CN 108226759B CN 201810215290 A CN201810215290 A CN 201810215290A CN 108226759 B CN108226759 B CN 108226759B
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- 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
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
- G01R31/2825—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere in household appliances or professional audio/video equipment
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Abstract
The invention discloses a line fault detection method and a line fault detection device for a non-display area of a display panel, wherein the method comprises the following steps: receiving a detection instruction and judging the type of the detection instruction; if the detection instruction is an instruction of the Gate line direction, the second ends of all the Gate lines are in short circuit connection by controlling the first connecting assembly, the Gate signal providing end provides a Gate signal to the pixel array by controlling the first switch unit, and whether the line of the non-display area in the Gate line direction has an open circuit fault is detected by judging whether each row of pixels are lightened; if the detection instruction is the instruction of the Source line direction, the second connecting assembly is controlled to enable the second ends of all the Source lines to be in short circuit connection, the second switch unit is controlled to enable the Source signal providing end to provide Source signals to the pixel array, and whether the line of the non-display area in the Source line direction has an open circuit fault is detected by judging whether each row of pixels are lightened, so that the module material consumption is reduced, and the cost is reduced.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a method and an apparatus for detecting a line fault in a non-display area of a display panel.
Background
At present, in a panel cell electrical test, a switch is generally designed on the same side or the opposite side of an IC (integrated circuit), wherein when the switch is designed on the same side of the IC, the switch may crack or scratch due to factors such as cutting, thereby causing defects; when the switch is designed on the opposite side of the IC, the defect of the Fanout line (line in the non-display area) cannot be detected, which results in loss of module material and increased cost.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, a first object of the present invention is to provide a method for detecting a line fault in a non-display area of a display panel, which can effectively detect whether a line in the non-display area has an open circuit fault, and can achieve the purposes of reducing the loss of module materials and reducing the cost.
A second object of the present invention is to provide a line fault detection apparatus for a non-display area of a display panel.
In order to achieve the above object, a first embodiment of the present invention provides a line fault detection method for a non-display area of a display panel, where the display area of the display panel includes a pixel array, a first end of a Gate line corresponding to each row of pixels in the pixel array is connected to a Gate signal providing end through a first switch unit, a first end of a Source line corresponding to each column of pixels in the pixel array is connected to the Source signal providing end through a second switch unit, a second end of the Gate line corresponding to each row of pixels is connected to a Gate driver through a first connection component of the non-display area, and a second end of the Source line corresponding to each column of pixels is connected to the Source driver through a second connection component of the non-display area, where the method includes the following steps: receiving a detection instruction and judging the type of the detection instruction; if the detection instruction is an instruction of a Gate line direction, the first connecting assembly is controlled to enable second ends of all Gate lines to be in short circuit connection, the first switch unit is controlled to enable the Gate signal providing end to provide a Gate signal to the pixel array, and whether the line of a non-display area of the Gate line direction has an open circuit fault is detected by judging whether each row of pixels are lightened; and if the detection instruction is an instruction in the Source line direction, the second connecting assembly is controlled to enable the second ends of all the Source lines to be in short circuit connection, the second switch unit is controlled to enable the Source signal providing end to provide Source signals to the pixel array, and whether the line of the non-display area in the Source line direction has an open circuit fault is detected by judging whether each column of pixels are lightened.
According to the line fault detection method of the non-display area of the display panel, a detection instruction is received, and the type of the detection instruction is judged; if the detection instruction is an instruction of the Gate line direction, the second ends of all the Gate lines are in short circuit connection by controlling the first connecting assembly, the Gate signal providing end provides a Gate signal to the pixel array by controlling the first switch unit, and whether the line of the non-display area of the Gate line direction has an open circuit fault is detected by judging whether each row of pixels is lightened; if the detection instruction is the instruction of the Source line direction, the second connecting assembly is controlled to enable the second ends of all the Source lines to be in short circuit connection, the second switch unit is controlled to enable the Source signal providing end to provide Source signals to the pixel array, and whether the line of the non-display area of the Source line direction has an open circuit fault is detected by judging whether each column of pixels are lightened. Therefore, the method can effectively detect whether the circuit of the non-display area has the open circuit fault, and can achieve the purposes of reducing the material loss of the module and reducing the cost.
In addition, the line fault detection method for the non-display area of the display panel according to the above embodiment of the present invention may further have the following additional technical features:
according to an embodiment of the present invention, the first switch unit includes a first group of switches and a second group of switches, wherein a first end of a Gate line corresponding to an odd-numbered row of pixels in the pixel array is connected to a first Gate signal supply terminal through the first group of switches, a first end of a Gate line corresponding to an even-numbered row of pixels in the pixel array is connected to a second Gate signal supply terminal through the second group of switches, and when second ends of all Gate lines are short-circuited, the first group of switches and the second group of switches are controlled so that a Gate signal supplied from the first Gate signal supply terminal or the second Gate signal supply terminal is output to all Gate lines in an arbitrary display screen of the display area, wherein the arbitrary display screen of the display area does not include an L0 screen or an L255 screen.
According to one embodiment of the invention, when any row of pixels is not lighted, the Gate line corresponding to the row of pixels is disconnected between the non-display area and the first connecting component.
According to an embodiment of the invention, the second switching unit comprises a third group of switches, a fourth group of switches and a fifth group of switches, wherein, the first end of the Source line corresponding to the R pixel column in the pixel array is connected to the first Source signal providing end through the third group of switches, the first end of the Source line corresponding to the G pixel column in the pixel array is connected to the second Source signal providing end through the fourth group of switches, the first ends of the Source lines corresponding to the B pixel columns in the pixel array are connected to the third Source signal providing end through the fifth group of switches, when the second ends of all the Source lines are in short circuit connection, and under the R/G/B display picture of the display area, the Source signals provided by the first Source signal providing end, the second Source signal providing end or the third Source signal providing end are output to all Source lines by controlling the third group of switches to the fifth group of switches.
According to an embodiment of the invention, when any column of pixels is not lighted, the Source line corresponding to the column of pixels is disconnected between the non-display area and the second connecting component.
In order to achieve the above object, a second aspect of the present invention provides a line fault detection apparatus for a non-display area of a display panel, where the display area of the display panel includes a pixel array, a first end of a Gate line corresponding to each row of pixels in the pixel array is connected to a Gate signal providing end through a first switch unit, a first end of a Source line corresponding to each column of pixels in the pixel array is connected to the Source signal providing end through a second switch unit, a second end of the Gate line corresponding to each row of pixels is connected to a Gate driver through a first connection component of the non-display area, and a second end of the Source line corresponding to each column of pixels is connected to the Source driver through a second connection component of the non-display area, the apparatus includes: the receiving module is used for receiving a detection instruction; the detection module is used for judging the type of the detection instruction, wherein if the detection instruction is an instruction in a Gate line direction, the first connecting assembly is controlled to enable second ends of all Gate lines to be in short circuit connection, the first switch unit is controlled to enable a Gate signal providing end to provide a Gate signal to the pixel array, and whether the line of a non-display area in the Gate line direction is in an open circuit fault or not is detected by judging whether pixels in each row are lightened; and if the detection instruction is an instruction in the Source line direction, the second connecting assembly is controlled to enable the second ends of all the Source lines to be in short circuit connection, the second switch unit is controlled to enable the Source signal providing end to provide Source signals to the pixel array, and whether the line of the non-display area in the Source line direction has an open circuit fault is detected by judging whether each column of pixels are lightened.
According to the line fault detection device of the non-display area of the display panel, the receiving module receives the detection instruction, and the detection module judges the type of the detection instruction, wherein when the detection instruction is an instruction in the direction of the Gate lines, the first connecting assembly is controlled to enable the second ends of all the Gate lines to be in short circuit connection, the first switch unit is controlled to enable the Gate signal providing end to provide a Gate signal to the pixel array, and whether the line of the non-display area in the direction of the Gate lines has an open circuit fault is detected by judging whether each row of pixels are lightened; when the detection instruction is an instruction of the Source line direction, the second connecting assembly is controlled to enable the second ends of all the Source lines to be in short circuit connection, the second switch unit is controlled to enable the Source signal providing end to provide Source signals to the pixel array, and whether the line of the non-display area of the Source line direction has an open circuit fault is detected by judging whether each column of pixels is lightened. Therefore, the device can effectively detect whether the circuit of the non-display area has an open circuit fault or not, and can achieve the purposes of reducing the material loss of the module and reducing the cost.
In addition, the line fault detection apparatus of the non-display area of the display panel according to the above embodiment of the present invention may further have the following additional technical features:
according to an embodiment of the present invention, the first switch unit includes a first group of switches and a second group of switches, wherein a first end of a Gate line corresponding to an odd-numbered row of pixels in the pixel array is connected to a first Gate signal providing terminal through the first group of switches, and a first end of a Gate line corresponding to an even-numbered row of pixels in the pixel array is connected to a second Gate signal providing terminal through the second group of switches, and the detection module is further configured to control the first group of switches and the second group of switches to output the Gate signals provided by the first Gate signal providing terminal or the second Gate signal providing terminal to all the Gate lines under any display screen of the display area when the second ends of all the Gate lines are short-circuited, wherein any display screen of the display area does not include an L0 screen or an L255 screen.
According to one embodiment of the invention, when any row of pixels is not lighted, the Gate line corresponding to the row of pixels is disconnected between the non-display area and the first connecting component.
According to an embodiment of the invention, the second switching unit comprises a third group of switches, a fourth group of switches and a fifth group of switches, wherein, the first end of the Source line corresponding to the R pixel column in the pixel array is connected to the first Source signal providing end through the third group of switches, the first end of the Source line corresponding to the G pixel column in the pixel array is connected to the second Source signal providing end through the fourth group of switches, the first end of the Source line corresponding to the B pixel column in the pixel array is connected to the third Source signal providing end through the fifth group of switches, the detection module is also used for detecting the short circuit of the second ends of all the Source lines, and under the R/G/B display picture of the display area, the Source signals provided by the first Source signal providing end, the second Source signal providing end or the third Source signal providing end are output to all Source lines by controlling the third group of switches to the fifth group of switches.
According to an embodiment of the invention, when any column of pixels is not lighted, the Source line corresponding to the column of pixels is disconnected between the non-display area and the second connecting component.
According to one embodiment of the invention, the display panel is an LCD panel.
Drawings
FIG. 1 is a schematic diagram of a display panel according to an embodiment of the present invention;
FIG. 2 is a flowchart of a line fault detection method of a non-display area of a display panel according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a display panel according to a specific example of the present invention;
fig. 4 is a schematic structural view of a display panel according to another specific example of the present invention;
fig. 5 is a block schematic diagram of a line fault detection apparatus of a non-display area of a display panel according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A line fault detection method of a non-display area of a display panel and a line fault detection apparatus of a non-display area of a display panel according to an embodiment of the present invention are described below with reference to the accompanying drawings.
In an embodiment of the invention, as shown in fig. 1, the display area of the display panel may include a pixel array, a first end of a Gate line corresponding to each row of pixels in the pixel array is connected to the Gate signal providing terminal through a first switch unit, a first end of a Source line corresponding to each column of pixels in the pixel array is connected to the Source signal providing terminal through a second switch unit, a second end of the Gate line corresponding to each row of pixels is connected to the Gate driver through a first connection component of the non-display area, and a second end of the Source line corresponding to each column of pixels is connected to the Source driver through a second connection component of the non-display area. In one embodiment of the present invention, the Display panel may be an LCD (Liquid Crystal Display) panel.
Taking the 4 × 6 pixel array shown in fig. 1 as an example, the Gate lines may include lines G1-G4, the Source lines may include lines S1-S6, and the first switch units corresponding to the Gate lines and the second switch units corresponding to the Source lines are all designed on opposite sides of the driver. The intersection point of each row of Gate lines and each column of Source lines forms a pixel point, for example, the G1 line and the S1 line form a pixel point, and each pixel point is driven by a TFT (Thin Film Transistor) integrated behind the pixel point.
Fig. 2 is a flowchart of a line fault detection method of a non-display area of a display panel according to an embodiment of the present invention. As shown in fig. 2, the method for detecting a line fault in a non-display area of a display panel according to an embodiment of the present invention may include the following steps:
and S1, receiving the detection command and judging the type of the detection command. The pixel array may include a Gate line corresponding to each row of pixels and a Source line corresponding to each column of pixels.
And S2, if the detection command is a command of the Gate line direction, the first connecting component is controlled to make the second ends of all the Gate lines connected in a short circuit mode, the first switch unit is controlled to make the Gate signal providing end provide the Gate signal to the pixel array, and whether the line of the non-display area of the Gate line direction has an open circuit fault is detected by judging whether the pixels of each row are lighted.
S3, if the detection instruction is the instruction of the Source line direction, the second connection components are controlled to make the second ends of all the Source lines connected in a short circuit mode, the second switch units are controlled to make the Source signal providing ends provide Source signals to the pixel array, and whether the line of the non-display area of the Source line direction has an open circuit fault is detected by judging whether each column of pixels are lightened. The open circuit fault can include faults caused by the problems of scratching, cracking and the like of the line.
Specifically, when the line in the non-display area of the display panel is detected, it may be determined according to the detection instruction that the line currently required to be detected is a Gate line or a Source line, so as to detect the line according to the corresponding detection mode. When the detection instruction is a detection instruction of a Gate line direction, the first connection module is controlled (for example, the first connection module is controlled to be in a closed state) to enable the second ends of all the Gate lines to be connected in a short circuit mode, then the first switch unit is controlled (for example, the first switch unit is controlled to be closed) to enable the Gate signal providing end to provide a Gate signal to the pixel array through the Gate lines, meanwhile, the second switch unit is controlled (for example, the second switch unit is controlled to be closed) to enable the Source signal providing end to provide a Source signal to the pixel array through the Source lines, whether the line of the non-display area of the Gate line direction has a fault is detected by judging whether each row of pixels are lighted, and for example, when the pixel points corresponding to the G1 line direction are not lighted, the line of the non-display area of the G1 line direction has an open circuit fault.
When the detection instruction is a detection instruction of the Source line direction, the second connection assemblies are controlled (for example, the second connection assemblies are controlled to be in a closed state) to enable the second ends of all the Source lines to be connected in a short circuit mode, then the second switch units are controlled (for example, the second switch units are controlled to be closed) to enable the Source signal providing ends to provide Source signals to the pixel array through the Source lines, meanwhile, the first switch units are controlled (for example, the first switch units are controlled to be closed) to enable the Gate signal providing ends to provide Gate signals to the pixel array through the Gate lines, whether the line of the non-display area of the Source line direction fails or not is detected by judging whether each column of pixels are lighted, and for example, when the pixel points corresponding to the S1 line direction are not lighted (for example, red is not displayed), the line of the non-display area of the S1 line direction is open-circuit failure.
Therefore, by short-circuiting the second ends of all the Gate lines together, when the pixels in each row are lighted, the line fault of the non-display area in the direction of the Gate lines can be accurately judged; by connecting the second ends of all the Source lines together in an open circuit mode, when each row of pixels are lightened, the line fault of the non-display area in the direction of the Source lines can be accurately judged, and therefore the purposes of reducing module material consumption and reducing cost can be achieved.
How to accurately judge whether the line of the non-display area is faulty or not is described in detail below with reference to a specific example (the pixel array shown in fig. 1 is still taken as an example).
According to an embodiment of the present invention, the first switch unit may include a first group of switches and a second group of switches, wherein the first ends of the Gate lines corresponding to the odd-numbered rows of pixels in the pixel array are connected to the first Gate signal supply terminal through the first group of switches, the first ends of the Gate lines corresponding to the even-numbered rows of pixels in the pixel array are connected to the second Gate signal supply terminal through the second group of switches, and when the second ends of all the Gate lines are short-circuited, the Gate signals supplied from the first Gate signal supply terminal or the second Gate signal supply terminal are output to all the Gate lines by controlling the first group of switches and the second group of switches under any display screen of the display area, wherein any display screen of the display area does not include an L0 screen or an L255 screen. The L0 picture is a picture with black and RGB values of 0; the L255 picture is a picture having a white color and RGB values of 255.
Further, according to an embodiment of the present invention, when any row of pixels is not lit, the Gate line corresponding to the row of pixels is disconnected between the non-display area and the first connection member.
Specifically, the display panel shown in fig. 3 is taken as an example. Dividing the first switch units into two groups, namely a first group of switches and a second group of switches, wherein first ends of Gate lines (G1 line and G3 line) corresponding to all odd-numbered rows of pixels in the pixel array are connected to a first Gate signal supply terminal GO through the first group of switches, first ends of Gate lines (G2 line and G4 line) corresponding to all even-numbered rows of pixels in the pixel array are connected to a second Gate signal supply terminal GE through the second group of switches, second ends of all Gate lines are connected to a Gate driver through a first connection component of the non-display area, and the first group of switches and the second group of switches are controlled to output Gate signals provided by the first Gate signal supply terminal GO or the second Gate signal supply terminal GE to all Gate lines, for example, the first group of switches are controlled to be closed, and the second group of switches are controlled to be open, so that Gate signals provided by the first Gate signal supply terminal GO are output to G1 line and G3 line; similarly, the second group of switches is controlled to be closed, and the first group of switches is controlled to be opened, so that the Gate signal provided by the second Gate signal providing terminal GE is output to the G2 line and the G4 line.
Referring to fig. 1 and 3, the first switching unit may include four switches (e.g., MOS transistors), each of which may include a gate, a source, and a drain, and the gate of each of the MOS transistors is connected to SW1, and each of the MOS transistors may receive a signal when SW1 outputs a gate signal. For example, when the Gate signal is output from the GO terminal, the SW1 outputs a Gate control signal, the first group of switches (i.e., the switches corresponding to the G1 line and the G3 line) is turned on, the G1 line and the G3 line receive the Gate signal, and the pixels in the rows corresponding to the G1 line and the G3 line are lit; similarly, when the second Gate signal supply terminal GE outputs the Gate signal, the second group of switches (i.e., the switches corresponding to the G2 line and the G4 line) are turned on, the G2 line and the G4 line receive the Gate signal, and the pixels in the rows corresponding to the G2 line and the G4 line are turned on. That is, the SW1 outputs a control signal to each switch of the first switching unit, and the corresponding switch is turned on according to the Gate signal output from the Gate signal supply terminals (GO and GE) so that the corresponding Gate line receives the signal.
Of course, when the Gate signal providing end outputs the Gate signal, the switch corresponding to the Gate signal providing end may be controlled to turn on the switch, so that the Gate line can receive the Gate signal. For example, when the first Gate signal providing terminal GO provides a Gate signal, the first group of switches is controlled to be turned on; when the second Gate signal supply terminal GE supplies the Gate signal, the second group of switches is controlled to be turned on.
Taking SW1 as an example to control all switches of the first switch unit, assuming that the G4 line is open-circuited in the non-display area open, in any image (except for L0 image or L255 image), the second ends of the Gate lines are connected together in a short circuit, a Gate signal (e.g. voltage) is input from the first Gate signal providing end G0, the second Gate signal providing end GE is floating, SW1 outputs a control signal, and the first group of switches is turned on, so that voltages are available on the other lines (G1 line, G2 line, and G3 line) except for the G4 line, that is, the other row pixels except for the row pixel corresponding to the G4 line can be turned on, that is, the row pixels corresponding to the G4 line are not turned on, thereby effectively detecting that the G4 line is open-circuited between the non-display area and the first connecting module.
According to another embodiment of the present invention, the second switch unit includes a third group of switches, a fourth group of switches, and a fifth group of switches, wherein the first end of the Source line corresponding to the R pixel column in the pixel array is connected to the first Source signal providing terminal through the third group of switches, the first end of the Source line corresponding to the G pixel column in the pixel array is connected to the second Source signal providing terminal through the fourth group of switches, the first end of the Source line corresponding to the B pixel column in the pixel array is connected to the third Source signal providing terminal through the fifth group of switches, and when the second ends of all the Source lines are connected in a short circuit, the Source signals provided by the first Source signal providing terminal, the second Source signal providing terminal, or the third Source signal providing terminal are output to all the Source lines by controlling the third group of switches to the fifth group of switches under the R/G/B display screen of the display area.
Further, according to an embodiment of the present invention, when any column of pixels is not lit, the Source line corresponding to the column of pixels is disconnected between the non-display area and the second connection component.
Specifically, the display panel shown in fig. 4 is taken as an example. The second switch units are divided into three groups, namely a third group switch, a fourth group switch and a fifth group switch, the first ends of the Source lines (S1 line and S4 line) corresponding to the R pixel columns in the pixel array are connected to the first Source signal providing end DR through the third group switch, the first ends of the Source lines (S2 line and S5 line) corresponding to the G pixel columns in the pixel array are connected to the second Source signal providing end DG through the fourth group switch, the first ends of the Source lines (S3 line and S6 line) corresponding to the B pixel columns in the pixel array are connected to the third Source signal providing end DB through the fifth group switch, and the second ends of all the Source lines are connected to the Source driver connecting component through the second group switch of the non-display region, the Source signals provided by the first Source signal providing terminal DR, the second Source signal providing terminal DG or the third Source signal providing terminal DB are output to all the Source lines by controlling the third group of switches to the fifth group of switches. For example, the third group of switches is controlled to be closed, and the fourth group of switches and the fifth group of switches are controlled to be opened, so that the Source signal provided by the first Source signal providing terminal DR is output to the S1 line and the S4 line; similarly, the fourth switch set is controlled to be closed, and the third switch set and the fifth switch set are controlled to be opened, so that the Source signal provided by the second Source signal providing terminal DG is output to the S2 line and the S5 line.
Referring to fig. 1 and 4, the second switching unit may include six switches (e.g., MOS transistors), each of which has a gate connected to SW2 and receives a gate signal when SW2 outputs the gate signal. For example, when the first Source signal providing terminal DR outputs the Source signal, the SW2 outputs the gate control signal, the third group of switches (the switches corresponding to the S1 line and the S4 line) is turned on, the S1 line and the S4 line receive the Source signal, and the column pixels corresponding to the S1 line and the S4 line are lit; similarly, when the second Source signal supply terminal DG outputs the Source signal, the fourth group of switches (switches corresponding to the S2 line and the S5 line) are turned on, and the column pixels corresponding to the S2 line and the S5 line are turned on. That is, the SW2 outputs a control signal to each switch of the second switching unit, and the corresponding switch is turned on according to the Source signals output from the Source signal supply terminals (DR, DG, and DB) so that the corresponding Source line receives the signal.
Of course, when the Source signal providing end outputs the Source signal, the switch corresponding to the Source signal providing end can be controlled to be turned on, so that the Source line can receive the Source signal. For example, when the first Source signal providing end DR provides a Source signal, the third group of switches is controlled to be turned on; when the second Source signal providing end DG provides a Source signal, the fourth group of switches are controlled to be conducted; and when the third Source signal providing terminal DB provides the Source signal, the fifth group of switches are controlled to be conducted.
Taking SW2 as an example to control all switches of the second group of switch units, assuming that the S1 line (connecting R pixels) is open (open) in the non-display area open, the second ends of the Source lines are short-circuited together in the G/B screen, the Source signals (such as voltages) input from the second Source signal supply terminal DG or the third Source signal supply terminal DB to the S2 line, the S3 line, the S5 line and the S6 line are output, the SW2 outputs a control signal, the fourth group of switches and the fifth group of switches are turned on, the column pixels corresponding to the S2 line, the S3 line, the S5 line and the S6 line are turned on, and the Source signal can reach the non-open Source line (S4 line) connecting R pixels, that is, the other R (red) pixels are turned on, and the R pixels corresponding to the S1 line cannot be turned on, thereby effectively detecting that the S1 line is open-circuited between the non-display area and the second group of switch units.
It should be noted that the above-mentioned embodiment for detecting whether the line in the non-display area in the G4 line direction and the S1 line direction has a fault is only used as a specific example of the present invention, and the method for detecting whether the line in the non-display area in the other Gate line and Source line directions has a fault is the same as that in the above-mentioned example, and is not repeated here.
In summary, according to the line fault detection method for the non-display area of the display panel in the embodiment of the present invention, the detection instruction is received first, and the type of the detection instruction is determined; if the detection instruction is an instruction of the Gate line direction, the second ends of all the Gate lines are in short circuit connection by controlling the first connecting assembly, the Gate signal providing end provides a Gate signal to the pixel array by controlling the first switch unit, and whether the line of the non-display area of the Gate line direction has an open circuit fault is detected by judging whether each row of pixels is lightened; if the detection instruction is the instruction of the Source line direction, the second connecting assembly is controlled to enable the second ends of all the Source lines to be in short circuit connection, the second switch unit is controlled to enable the Source signal providing end to provide Source signals to the pixel array, and whether the line of the non-display area of the Source line direction has an open circuit fault is detected by judging whether each column of pixels are lightened. Therefore, the method can effectively detect whether the circuit of the non-display area has the open circuit fault, and can achieve the purposes of reducing the material loss of the module and reducing the cost.
Fig. 5 is a block schematic diagram of a line fault detection apparatus of a non-display area of a display panel according to an embodiment of the present invention.
In an embodiment of the present invention, the display region of the display panel includes a pixel array, a first end of a Gate line corresponding to each row of pixels in the pixel array is connected to a Gate signal providing end through a first switch unit, a first end of a Source line corresponding to each column of pixels in the pixel array is connected to the Source signal providing end through a second switch unit, a second end of the Gate line corresponding to each row of pixels is connected to the Gate driver through a first connection component of the non-display region, and a second end of the Source line corresponding to each column of pixels is connected to the Source driver through a second connection component of the non-display region.
As shown in fig. 5, the line fault detection apparatus of the non-display area of the display panel according to the embodiment of the present invention may include: a receiving module 10 and a detecting module 20.
The receiving module 10 is configured to receive a detection instruction. The detection module 20 is configured to determine a type of the detection instruction, wherein if the detection instruction is an instruction in a Gate line direction, the first connection module is controlled to short-circuit second ends of all Gate lines, the first switch unit is controlled to enable a Gate signal providing end to provide a Gate signal to the pixel array, and whether a line of the non-display area in the Gate line direction has an open-circuit fault is determined by determining whether each row of pixels is turned on; if the detection instruction is the instruction of the Source line direction, the second connecting assembly is controlled to enable the second ends of all the Source lines to be in short circuit connection, the second switch unit is controlled to enable the Source signal providing end to provide Source signals to the pixel array, and whether the line of the non-display area of the Source line direction has an open circuit fault is detected by judging whether each column of pixels are lightened.
According to an embodiment of the present invention, the first switch unit may include a first group of switches and a second group of switches, wherein the first ends of the Gate lines corresponding to the odd-numbered rows of pixels in the pixel array are connected to the first Gate signal providing terminal through the first group of switches, and the first ends of the Gate lines corresponding to the even-numbered rows of pixels in the pixel array are connected to the second Gate signal providing terminal through the second group of switches, and the detection module 20 is further configured to, when the second ends of all the Gate lines are short-circuited, output the Gate signals provided by the first Gate signal providing terminal or the second Gate signal providing terminal to all the Gate lines by controlling the first group of switches and the second group of switches under any display screen of the display area, wherein any display screen of the display area does not include an L0 screen or an L255 screen.
According to one embodiment of the present invention, when any row of pixels is not lit, the Gate line corresponding to the row of pixels is disconnected between the non-display area and the first connection member.
According to an embodiment of the present invention, the second switching unit may include a third group of switches, a fourth group of switches, and a fifth group of switches, wherein, the first end of the Source line corresponding to the R pixel column in the pixel array is connected to the first Source signal providing end through the third group of switches, the first end of the Source line corresponding to the G pixel column in the pixel array is connected to the second Source signal providing end through the fourth group of switches, the first end of the Source line corresponding to the B pixel column in the pixel array is connected to the third Source signal providing end through the fifth group of switches, the detection module 20 is further configured to, when the second ends of all the Source lines are short-circuited, and under the R/G/B display picture of the display area, the Source signals provided by the first Source signal providing end, the second Source signal providing end or the third Source signal providing end are output to all the Source lines by controlling the third group of switches to the fifth group of switches.
According to an embodiment of the invention, when any column of pixels is not lighted, the Source line corresponding to the column of pixels is disconnected between the non-display area and the second connecting component.
According to one embodiment of the present invention, the display panel may be an LCD panel.
It should be noted that, for details not disclosed in the line fault detection apparatus for the non-display area of the display panel according to the embodiment of the present invention, please refer to details disclosed in the line fault detection method for the non-display area of the display panel according to the embodiment of the present invention, and details are not repeated herein.
According to the line fault detection device of the non-display area of the display panel, the receiving module receives the detection instruction, and the detection module judges the type of the detection instruction, wherein when the detection instruction is an instruction in the direction of the Gate lines, the first connecting assembly is controlled to enable the second ends of all the Gate lines to be in short circuit connection, the first switch unit is controlled to enable the Gate signal providing end to provide a Gate signal to the pixel array, and whether the line of the non-display area in the direction of the Gate lines has an open circuit fault is detected by judging whether each row of pixels are lightened; when the detection instruction is an instruction of the Source line direction, the second connecting assembly is controlled to enable the second ends of all the Source lines to be in short circuit connection, the second switch unit is controlled to enable the Source signal providing end to provide Source signals to the pixel array, and whether the line of the non-display area of the Source line direction has an open circuit fault is detected by judging whether each column of pixels is lightened. Therefore, the device can effectively detect whether the circuit of the non-display area has an open circuit fault or not, and can achieve the purposes of reducing the material loss of the module and reducing the cost.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (11)
1. A line fault detection method for a non-display area of a display panel is characterized in that the display area of the display panel comprises a pixel array, a first end of a Gate line corresponding to each row of pixels in the pixel array is connected to a Gate signal providing end through a first switch unit, a first end of a Source line corresponding to each column of pixels in the pixel array is connected to a Source signal providing end through a second switch unit, a second end of the Gate line corresponding to each row of pixels is connected to a Gate driver through a first connecting component of the non-display area, and a second end of the Source line corresponding to each column of pixels is connected to the Source driver through a second connecting component of the non-display area, the method comprises the following steps:
receiving a detection instruction and judging the type of the detection instruction;
if the detection instruction is an instruction of a Gate line direction, the first connecting assembly is controlled to enable second ends of all Gate lines to be in short circuit connection, the first switch unit is controlled to enable the Gate signal providing end to provide a Gate signal to the pixel array, and whether the line of a non-display area of the Gate line direction has an open circuit fault is detected by judging whether each row of pixels are lightened;
and if the detection instruction is an instruction in the Source line direction, the second connecting assembly is controlled to enable the second ends of all the Source lines to be in short circuit connection, the second switch unit is controlled to enable the Source signal providing end to provide Source signals to the pixel array, and whether the line of the non-display area in the Source line direction has an open circuit fault is detected by judging whether each column of pixels are lightened.
2. The line fault detection method of the non-display area of the display panel according to claim 1, wherein the first switch unit includes a first group of switches through which the first ends of the Gate lines corresponding to the odd-numbered row pixels in the pixel array are connected to a first Gate signal supply terminal and a second group of switches through which the first ends of the Gate lines corresponding to the even-numbered row pixels in the pixel array are connected to a second Gate signal supply terminal,
when the second ends of all the Gate lines are connected in a short circuit, under any display picture in the display area, the Gate signals provided by the first Gate signal providing end or the second Gate signal providing end are output to all the Gate lines by controlling the first group of switches and the second group of switches, wherein the any display picture in the display area does not include an L0 picture or an L255 picture, the L0 picture is a picture with black picture and 0 RGB value, the L255 picture is a picture with white picture and 255 RGB value.
3. The line fault detection method of the non-display area of the display panel according to claim 2, wherein when any row of pixels is not lit, the Gate line corresponding to the row of pixels is disconnected between the non-display area and the first connection member.
4. The line fault detection method of the non-display area of the display panel according to claim 1, wherein the second switch unit includes a third set of switches, a fourth set of switches, and a fifth set of switches, wherein the first end of the Source line corresponding to the R pixel column in the pixel array is connected to the first Source signal supply terminal through the third set of switches, the first end of the Source line corresponding to the G pixel column in the pixel array is connected to the second Source signal supply terminal through the fourth set of switches, the first end of the Source line corresponding to the B pixel column in the pixel array is connected to the third Source signal supply terminal through the fifth set of switches,
when the second ends of all the Source lines are in short circuit connection, under the R/G/B display picture of the display area, the Source signals provided by the first Source signal providing end, the second Source signal providing end or the third Source signal providing end are output to all the Source lines by controlling the third group of switches to the fifth group of switches.
5. The method as claimed in claim 4, wherein when any column of pixels is not lit, the Source line corresponding to the column of pixels is disconnected between the non-display area and the second connecting component.
6. A line fault detection device for a non-display area of a display panel, wherein the display area of the display panel comprises a pixel array, a first end of a Gate line corresponding to each row of pixels in the pixel array is connected to a Gate signal providing end through a first switch unit, a first end of a Source line corresponding to each column of pixels in the pixel array is connected to a Source signal providing end through a second switch unit, a second end of the Gate line corresponding to each row of pixels is connected to a Gate driver through a first connection assembly of the non-display area, and a second end of the Source line corresponding to each column of pixels is connected to the Source driver through a second connection assembly of the non-display area, the device comprises:
the receiving module is used for receiving a detection instruction;
a detection module for judging the type of the detection instruction, wherein,
if the detection instruction is an instruction of a Gate line direction, the first connecting assembly is controlled to enable second ends of all Gate lines to be in short circuit connection, the first switch unit is controlled to enable the Gate signal providing end to provide a Gate signal to the pixel array, and whether the line of a non-display area of the Gate line direction has an open circuit fault is detected by judging whether each row of pixels are lightened;
and if the detection instruction is an instruction in the Source line direction, the second connecting assembly is controlled to enable the second ends of all the Source lines to be in short circuit connection, the second switch unit is controlled to enable the Source signal providing end to provide Source signals to the pixel array, and whether the line of the non-display area in the Source line direction has an open circuit fault is detected by judging whether each column of pixels are lightened.
7. The apparatus of claim 6, wherein the first switch unit comprises a first set of switches and a second set of switches, wherein the first ends of the Gate lines corresponding to odd-numbered rows of pixels in the pixel array are connected to a first Gate signal supply terminal through the first set of switches, the first ends of the Gate lines corresponding to even-numbered rows of pixels in the pixel array are connected to a second Gate signal supply terminal through the second set of switches, and the detection module is further configured to,
when the second ends of all the Gate lines are connected in a short circuit, under any display picture in the display area, the Gate signals provided by the first Gate signal providing end or the second Gate signal providing end are output to all the Gate lines by controlling the first group of switches and the second group of switches, wherein the any display picture in the display area does not include an L0 picture or an L255 picture, the L0 picture is a picture with black picture and 0 RGB value, the L255 picture is a picture with white picture and 255 RGB value.
8. The apparatus of claim 7, wherein when any row of pixels is not lit, the Gate line corresponding to the row of pixels is disconnected between the non-display area and the first connecting member.
9. The apparatus according to claim 6, wherein the second switch unit comprises a third set of switches, a fourth set of switches, and a fifth set of switches, wherein the first end of the Source line corresponding to the R pixel column in the pixel array is connected to the first Source signal providing terminal through the third set of switches, the first end of the Source line corresponding to the G pixel column in the pixel array is connected to the second Source signal providing terminal through the fourth set of switches, the first end of the Source line corresponding to the B pixel column in the pixel array is connected to the third Source signal providing terminal through the fifth set of switches, and the detection module is further configured to,
when the second ends of all the Source lines are in short circuit connection, under the R/G/B display picture of the display area, the Source signals provided by the first Source signal providing end, the second Source signal providing end or the third Source signal providing end are output to all the Source lines by controlling the third group of switches to the fifth group of switches.
10. The apparatus of claim 9, wherein when any column of pixels is not illuminated, the Source line corresponding to the column of pixels is disconnected between the non-display area and the second connecting component.
11. The line fault detection device of the non-display area of the display panel according to any one of claims 6 to 10, wherein the display panel is an LCD panel.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001255236A (en) * | 2000-03-09 | 2001-09-21 | Enplas Corp | Terminal contact retaining structure of display panel inspecting socket, and display panel inspecting socket |
| CN1831550A (en) * | 2006-04-26 | 2006-09-13 | 广辉电子股份有限公司 | Contactless detection device of display panel |
| CN101004879A (en) * | 2007-01-05 | 2007-07-25 | 四川长虹电器股份有限公司 | Method and device for testing display screen |
| CN101021628A (en) * | 2007-02-16 | 2007-08-22 | 友达光电股份有限公司 | Testing system and method for liquid crystal display panel and array substrate |
| CN101369404A (en) * | 2008-06-13 | 2009-02-18 | 黄山市英赛特实业有限公司 | Detection apparatus and detection method of LCD screen |
| US9772529B2 (en) * | 2012-06-20 | 2017-09-26 | Stanley Electric Co., Ltd. | Liquid crystal display |
-
2018
- 2018-03-15 CN CN201810215290.XA patent/CN108226759B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001255236A (en) * | 2000-03-09 | 2001-09-21 | Enplas Corp | Terminal contact retaining structure of display panel inspecting socket, and display panel inspecting socket |
| CN1831550A (en) * | 2006-04-26 | 2006-09-13 | 广辉电子股份有限公司 | Contactless detection device of display panel |
| CN101004879A (en) * | 2007-01-05 | 2007-07-25 | 四川长虹电器股份有限公司 | Method and device for testing display screen |
| CN101021628A (en) * | 2007-02-16 | 2007-08-22 | 友达光电股份有限公司 | Testing system and method for liquid crystal display panel and array substrate |
| CN101369404A (en) * | 2008-06-13 | 2009-02-18 | 黄山市英赛特实业有限公司 | Detection apparatus and detection method of LCD screen |
| US9772529B2 (en) * | 2012-06-20 | 2017-09-26 | Stanley Electric Co., Ltd. | Liquid crystal display |
Non-Patent Citations (1)
| Title |
|---|
| 有源矩阵液晶显示器的缺陷检测;葛长军 等;《半导体技术》;19990228;第1-7页 * |
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