CN110136618B - Display panel detection circuit, display device and display panel detection method - Google Patents
Display panel detection circuit, display device and display panel detection method Download PDFInfo
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- CN110136618B CN110136618B CN201910470872.7A CN201910470872A CN110136618B CN 110136618 B CN110136618 B CN 110136618B CN 201910470872 A CN201910470872 A CN 201910470872A CN 110136618 B CN110136618 B CN 110136618B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8803—Visual inspection
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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
Abstract
The invention provides a display panel detection circuit which comprises a display control unit, a panel detection switch unit and a crack detection switch unit, wherein the display panel comprises a first edge test line arranged at the edge region of the display panel. The panel detection switch unit outputs the gray scale signal to the data line when receiving the switch signal, the display control unit is used for outputting the edge test signal to the crack detection switch unit through the first edge test line, and the crack detection switch unit outputs the gray scale signal to the data line when receiving the edge test signal and the switch signal. The panel detection switch unit and the crack detection switch unit are connected to different data lines. When the edge of the display panel is broken, the first edge test line is disconnected, so that gray scale abnormality occurs to a row of pixels corresponding to the crack detection switch unit, and the detection of display problems and edge breakage defects can be realized. The invention also provides a display device comprising the detection circuit and a detection method for detecting the display device.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel detection circuit, a display device including the display panel detection circuit, and a display panel detection method for detecting the display device.
Background
In the manufacturing process of the display panel, the display panel may have problems of light leakage, MURA (MURA), edge fracture, and the like, and the display problems of light leakage, MURA, and the like are generally detected through a display result of a single-color picture in the conventional display panel detection technology, and the edge fracture defect cannot be well found.
Therefore, how to provide a display panel detection circuit capable of detecting both the display problem and the edge crack is a technical problem to be solved in the field.
Disclosure of Invention
The present invention is directed to a display panel detection circuit that can be used to detect both display problems and edge crack defects of a display panel.
To achieve the above object, as a first aspect of the present invention, there is provided a display panel detection circuit for detecting a display panel including at least one first edge test line disposed at an edge region of the display panel, the display panel detection circuit including a display control unit for outputting a gray scale signal capable of driving the display panel to display a predetermined image, a plurality of panel detection switch units, and at least one crack detection switch unit;
the input end of the panel detection switch unit is used for receiving the gray scale signal output by the display control unit, the output end of the panel detection switch unit is used for being electrically connected with the data line of the display panel, and when the control end of the panel detection switch unit receives an effective switch signal, the input end of the panel detection switch unit is conducted with the output end of the panel detection switch unit;
the edge test signal output end of the display control unit is used for outputting an edge test signal to the edge test input end of the first edge test line;
the first control end of the crack detection switch unit is used for being electrically connected with the edge test output end of the first edge test line, the input end of the crack detection switch unit is used for receiving gray scale signals output by the display control unit, the output end of the crack detection switch unit is used for being electrically connected with the data line of the display panel, and the crack detection switch unit is used for conducting the input end of the crack detection switch unit with the output end of the crack detection switch unit when the first control end of the crack detection switch unit receives edge test signals and the second control end of the crack detection switch unit receives effective switch signals;
the output end of the panel detection switch unit and the output end of the crack detection switch unit are respectively and electrically connected with different data lines.
Preferably, the panel detection switch unit includes a first panel detection switch unit including a first transistor, a gate of the first transistor is formed as a control terminal of the first panel detection switch unit, a first pole of the first transistor is formed as an input terminal of the first panel detection switch unit, and a second pole of the first transistor is formed as an output terminal of the first panel detection switch unit.
Preferably, the panel detection switch unit further includes a second panel detection switch unit, the control terminal of the second panel detection switch unit includes a first control terminal and a second control terminal, the input terminal of the second panel detection switch unit includes a first input terminal and a second input terminal, the output terminal of the second panel detection switch unit includes a first output terminal and a second output terminal, the second panel detection switch unit includes a second transistor and a third transistor, a gate of the second transistor is formed as the first control terminal of the second panel detection switch unit, a first pole of the second transistor is formed as the first input terminal of the second panel detection switch unit, and a second pole of the second transistor is formed as the first output terminal; a gate electrode of the third transistor is formed as a second control terminal of the second panel detection switch unit, a first pole of the third transistor is formed as a second input terminal of the second panel detection switch unit, and a second pole of the third transistor is formed as a second output terminal of the second panel detection switch unit.
Preferably, the crack detection switch unit includes a fourth transistor and a fifth transistor, a gate of the fourth transistor is formed as the first control terminal of the crack detection switch unit, a first pole of the fourth transistor is formed as the input terminal of the crack detection switch unit, a second pole of the fourth transistor is electrically connected to the first pole of the fifth transistor, a gate of the fifth transistor is formed as the second control terminal of the crack detection switch unit, and a second pole of the fifth transistor is formed as the output terminal of the crack detection switch unit.
Preferably, the display panel detection circuit further includes a switch control unit for supplying a switch signal to the control terminal of each panel detection switch unit and the second control terminal of each crack detection switch unit.
As a second aspect of the present invention, there is provided a display device, wherein the display panel includes a display area for displaying and an edge area surrounding the display area, the display panel includes a plurality of data lines, the display panel includes at least one first edge test line disposed at the edge area of the display panel, the display device includes a display panel and the display panel detection circuit, the plurality of data lines includes a plurality of first data lines corresponding to a plurality of panel detection switch units one by one, the display panel further includes at least one second data line, the at least one second data line corresponds to at least one crack detection switch unit one by one, an output end of the panel detection switch unit is electrically connected to the first data line corresponding to the panel detection switch unit, an output end of the crack detection switch unit is electrically connected to the second data line corresponding to the crack detection switch unit, the first edge test line is arranged at an edge region of the display panel.
Preferably, the display panel comprises a plurality of pixel units arranged in a plurality of rows and a plurality of columns, the plurality of columns of pixel units comprise a first pixel unit column and a second pixel unit column which are alternately arranged, the display panel detection circuit is a display panel detection circuit comprising the second panel detection switch unit,
the first pixel unit column comprises first color pixel units and second color pixel units which are alternately arranged, and the second pixel unit column comprises third color pixel units;
the data lines corresponding to at least one row of the second pixel unit rows are electrically connected with the output end of the crack detection switch unit;
the first panel detection switch unit is electrically connected with the data line corresponding to the first pixel unit column;
the second panel detection switch unit is electrically connected with the data line corresponding to at least one second pixel unit column.
Preferably, the display panel detection circuit includes two display control units and two first edge test lines, the display panel further includes a second edge test line, and two ends of the second edge test line are electrically connected to edge test output ends of the two first edge test lines respectively;
the display device further comprises a source electrode driving circuit used for providing preset gray scale signals for each data line of the display panel, wherein the source electrode driving circuit comprises two edge detection signal ends, the two edge detection signal ends are respectively electrically connected with the edge test input ends of the two first edge test lines and are used for loading edge test voltage to the first edge test line and the second edge test line which are connected between the two edge detection signal ends.
As a third aspect of the present invention, there is provided a detection method of a display panel for detecting a display panel in the aforementioned display apparatus, the detection method comprising the following first detection steps performed synchronously at least for a first predetermined period of time:
inputting an edge test signal to an edge test input end of the first edge test line;
inputting gray scale signals generated according to a preset detection image to the input end of the panel detection switch unit and the input end of the crack detection switch unit;
inputting corresponding switch signals to the control end of the panel detection switch unit and the second control end of the crack detection switch unit, so that the panel detection switch unit and the crack detection switch unit output the gray scale signals to each data line of the display panel under the control of the switch signals, and the display panel displays the preset detection image.
Preferably, the display device is a display device including the second edge test line, the method for detecting the display panel further includes a second detection step performed after the first detection step and at least within a second preset time period, and the second detection step includes:
inputting an invalid switch signal to a control terminal of the panel detection switch unit and a second control terminal of the crack detection switch unit;
and loading edge test voltage to edge test input ends of two first edge test lines through two edge test signal ends of the source electrode driving circuit, and detecting current flowing through the first edge test line and the second edge test line connected between the two edge test signal ends.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a display panel detection circuit according to the present invention;
FIG. 2 is a diagram of a display panel detection circuit according to an embodiment of the present invention;
FIG. 3 is a diagram of another embodiment of a display panel detection circuit according to the present invention;
FIG. 4 is a diagram of another embodiment of a display panel detection circuit according to the present invention;
FIG. 5 is a schematic view of a display device provided by the present invention;
FIG. 6 is a schematic diagram of an embodiment of a display device provided in the present invention;
fig. 7 is a schematic diagram of another embodiment of a display device provided by the present invention.
Description of the reference numerals
10: display panel detection circuit 20: source electrode driving circuit
30: display panel 110: first panel detection switch unit
120: second panel detection switch unit 200: crack detection switch unit
300: the display control unit 400: switch control unit
T1: first transistor T2: second transistor
T3: third transistor T4: a fourth transistor
T5: fifth transistor
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
To solve the above technical problem, as an aspect of the present invention, as shown in fig. 1, there is provided a display panel detection circuit 10, the display panel detection circuit 10 is configured to detect a display panel, the display panel includes at least one first edge test line (not shown) disposed at an edge region (a region surrounding a display region for displaying) of the display panel, the display panel detection circuit 10 includes a display control unit 300, a plurality of panel detection switch units (including a first panel detection switch unit 110 and a second panel detection switch unit 120 in the figure), and at least one crack detection switch unit 200, and the display control unit 300 is configured to output a gray scale signal capable of driving the display panel to display a predetermined image.
The input end of the panel detection switch unit is used for receiving gray scale signals output by the display control unit 300, the output end of the panel detection switch unit is used for being electrically connected with the data line of the display panel, and when the control end of the panel detection switch unit receives effective switch signals, the input end of the panel detection switch unit is conducted with the output end of the panel detection switch unit.
The edge test signal output end PCD _ VGL of the display control unit is used for outputting an edge test signal to the edge test input end PCD IN of the first edge test line.
The first control terminal of the crack detection switch unit 200 is configured to be electrically connected to the edge test output terminal PCD OUT of the first edge test line. The input end of the crack detection switch unit 200 is configured to receive the gray scale signal output by the display control unit 300, the output end of the crack detection switch unit 200 is configured to be electrically connected to the data line of the display panel, and the crack detection switch unit 200 is configured to conduct the input end of the crack detection switch unit 200 and the output end of the crack detection switch unit 200 when the first control end of the crack detection switch unit 200 receives the edge test signal and the second control end of the crack detection switch unit 200 receives an effective switch signal.
The output end of the panel detection switch unit and the output end of the crack detection switch unit 200 are electrically connected to different data lines, respectively.
The display panel detection circuit 10 of the present invention can realize detection of edge breakage while realizing detection of display problems, specifically: as shown in fig. 1, when the display panel detection circuit 10 performs a detection function, each gate line of the display panel normally performs scanning, and the source driving circuit 20 for supplying a data signal to each data line of the display panel does not operate. The output terminal of each of the panel detection switch units of the display panel detection circuit 10 and the output terminal of the crack detection switch unit 200 supply the gray-scale signal output by the display control unit 300 to each data line (only the data line data1 to the data line data4 are shown in the figure) instead of each port of the source drive circuit 20, respectively, and the display panel displays a predetermined image using the gray-scale signal. After the display panel is lighted, whether the display panel displays the predetermined pattern is judged by means of human eye observation, machine recognition or the like, so that the display problem is found according to the difference between the actual display image and the predetermined image.
It should be noted that, in the present invention, it is defined that the display panel includes a display area for displaying an image and an edge area disposed around the display area, and the edge fracture defect occurs in the edge area of the display panel. When the edge of the display panel is broken, the first edge test line arranged on the edge area is also broken, so that the first control end of the crack detection switch unit 200 cannot receive the edge test signal, and the data line corresponding to the crack detection switch unit 200 cannot load a predetermined gray scale voltage to the corresponding pixel, so that a row of pixels corresponding to the crack detection switch unit 200 in a displayed image has a gray scale abnormal condition, and finally whether the edge breaking defect occurs is judged by means of human eye observation or machine identification, and the like, so that the synchronous detection of the display problem and the edge breaking defect can be realized.
It should be noted that, in the present invention, the switch signals received by the control terminal of the panel detection switch unit and the second control terminal of the crack detection switch unit 200 are not particularly limited as long as the signals can enable each panel detection switch unit and the crack detection switch unit 200 to provide the gray scale signal to the data line at a suitable time, for example, the switch signal may be a clock signal, an electric potential signal manually adjusted by a worker, or a signal with a constant magnitude.
To facilitate understanding of those skilled IN the art, fig. 5 is a schematic diagram of a specific case where the display panel detection circuit 10 of the present invention is applied to a display device, where a thick line is a first edge test line having two ends respectively formed as an edge test input end PCD IN and an edge test output end PCD OUT, and the first edge test line is disposed along an edge region (a region outside the display region a 1) of the display panel 30.
In order to distinguish the region where the edge break occurs, it is preferable that the display panel detection circuit 10 includes two display control units 300 and two corresponding first edge test lines, as shown in fig. 3, 4, and 6, and each display control unit 300 is connected to only a portion of the data lines of the display panel. The display control units 300 are respectively connected to different data lines of the display panel (for example, in the figure, one display control unit 300 is connected to the data line data1 to the data line data4, and the other display control unit 300 is connected to the data line data5 to the data line data8), so that the first edge test lines corresponding to each display control unit 300 can be distributed at different edge regions of the display panel (as shown in fig. 6). When the gray scale of a certain row of pixels of the displayed image is abnormal, the distribution position of the first edge test line connected with the display control unit 300 corresponding to the abnormal row in the edge region can be determined according to the position of the abnormal row, so that the judgment range of edge fracture defects is reduced, the troubleshooting efficiency is improved, and the workers can perform remedial work in time.
The structure of the display control unit 300 is not particularly limited in the present invention, as long as the gray scale signal required for normal detection can be implemented, for example, when the color of the pixel unit on the display panel includes three colors of red, green and blue, as shown in fig. 1 and 3, the display control unit 300 may include a red gray scale signal output end CTDR, a green gray scale signal output end CTDG, and a blue gray scale signal output end CTDB.
The present invention does not specifically limit the circuit structure of the panel detection switch unit, as long as the functions of the panel detection switch unit described above can be realized, for example, as shown in fig. 2 and 4, as a preferred embodiment of the present invention, the panel detection switch unit includes a first panel detection switch unit 110 (i.e., the panel detection switch unit corresponding to the data line data2 and the data line data6 in the figure), the first panel detection switch unit 110 includes a first transistor T1, a gate of the first transistor T1 is formed as a control terminal of the first panel detection switch unit 110, a first pole of the first transistor T1 is formed as an input terminal of the first panel detection switch unit 110, and a second pole of the first transistor T1 is formed as an output terminal of the first panel detection switch unit 110.
In order to cope with display panels of different structures and improve the adaptability of the display panel detection circuit 10, preferably, as shown in fig. 2 and 4, the panel detection switch unit further includes a second panel detection switch unit 120 (i.e. the panel detection switch unit corresponding to the data line data1, the data line data3, the data line data5 and the data line data7 in the figure), the control terminal of the second panel detection switch unit 120 includes a first control terminal and a second control terminal, the input terminal of the second panel detection switch unit 120 includes a first input terminal and a second input terminal, the output terminal of the second panel detection switch unit 120 includes a first output terminal and a second output terminal, the second panel detection switch unit 120 includes a second transistor T2 and a third transistor T3, the gate of the second transistor T2 is formed as the first control terminal of the second panel detection switch unit 120, the first pole of the second transistor T2 is formed as the first input terminal of the second panel detection switch unit 120, a second pole of the second transistor T2 is formed as a first output terminal of the second panel detection switch unit 120; a gate of the third transistor T3 is formed as a second control terminal of the second panel detecting switch unit 120, a first pole of the third transistor T3 is formed as a second input terminal of the second panel detecting switch unit 120, and a second pole of the third transistor T3 is formed as a second output terminal of the second panel detecting switch unit 120.
The inventor of the present invention has found through research that, when the pixels corresponding to the pixels of each color in the display panel adopt a complicated arrangement manner, a situation of "the same data line corresponds to the pixel units of different colors" may occur. Therefore, the inventor proposes a preferred embodiment to deal with the situation, as shown in fig. 1 to 4, when the display panel detection circuit 10 described in the present embodiment is adopted, even if the same data line corresponds to pixel units of different colors, the display of a pure color image can be realized, specifically:
fig. 1 to 4 are schematic diagrams illustrating connection between the panel detection switch unit and the crack detection switch unit 200 when the display panel is in the P-arrangement (Pentile-arrangement), in which blue pixels and red pixels are alternately arranged in the same column and green pixels are arranged in a column. Therefore, the second panel inspection switch unit 120 including the second transistor T2 and the third transistor T3 is used to connect a data line corresponding to red and blue at the same time (i.e., the data line data1, the data line data3, the data line data5, and the data line data7 in the figure), so that the panel inspection switch unit can input gray scale signals to the same data line through the first output terminal and the second output terminal at different times according to signals of the first control terminal, the first input terminal, the second control terminal, and the second input terminal thereof, thereby implementing the display of a pure color test pattern, specifically:
in the process of displaying the blue pure-color image, the display control unit 300 inputs a gray scale signal to only the first electrode of the second transistor T2 corresponding to the blue pixel in the second panel detection switch unit 120, inputs an effective switch signal to the gate of the second transistor T2 corresponding to the blue pixel when the gate driving circuit scans the row corresponding to the blue pixel, and inputs an ineffective switch signal to the gate of the second transistor T2 corresponding to the blue pixel when the gate driving circuit scans the row corresponding to the red pixel, so that the gray scale signal is only applied to the row where the blue pixel is located in the data line, and the blue pixel units on the data line are sequentially turned on, thereby displaying the blue pure-color image;
in the process of displaying a red pure color image, the display control unit 300 inputs a gray scale signal to only the first pole of the third transistor T3 corresponding to the red display in the second panel detection switch unit 120, inputs an effective switch signal to the gate of the third transistor T3 corresponding to the red pixel when the gate driving circuit scans the row corresponding to the red pixel, and inputs an ineffective switch signal to the gate of the third transistor T3 corresponding to the red pixel when the gate driving circuit scans the row corresponding to the blue pixel, so that the data line has a gray scale signal only when the row corresponding to the red pixel is scanned, and the red pixel units on the data line are sequentially turned on, thereby displaying a red pure color image.
The circuit structure of the crack detection switch unit 200 is not particularly limited in the present invention as long as the function of the crack detection switch unit 200 described above can be achieved, and for example, as shown in fig. 2 and 4, as a preferred embodiment of the present invention, the crack detection switch unit 200 includes a fourth transistor T4 and a fifth transistor T5, a gate of the fourth transistor T4 is formed as a first control terminal of the crack detection switch unit 200, a first pole of the fourth transistor T4 is formed as an input terminal of the crack detection switch unit 200, a second pole of the fourth transistor T4 is electrically connected to a first pole of the fifth transistor T5, a gate of the fifth transistor T5 is formed as a second control terminal of the crack detection switch unit 200, and a second pole of the fifth transistor T5 is formed as an output terminal of the crack detection switch unit 200.
In the present invention, specific types of the first transistor T1 to the fifth transistor T5 are not particularly limited, and for example, the transistors may be all N-type transistors, all P-type transistors, some N-type transistors, and some P-type transistors. In the embodiments shown in the drawings of the present invention, each transistor is a P-type transistor.
The present invention is not particularly limited as to how the switching signals are provided to the panel detection switch units and the crack detection switch units 200, and preferably, as shown in fig. 1 to 4, the display panel detection circuit 10 further includes a switch control unit 400, and the switch control unit 400 is configured to provide the switching signals to the control terminals of the respective panel detection switch units and the second control terminals of the respective crack detection switch units 200.
The structure of the switch control unit 400 is not particularly limited in the present invention, and for example, when the colors of the pixel units on the display panel include three colors of Red (R, Red) Green (G, Green) Blue (B, Blue), the switch control unit 400 may include a Red switch signal output terminal SWR, a Green switch signal output terminal SWG, and a Blue switch signal output terminal SWB.
When the display effect of a pure color image of a certain color needs to be detected, the display of a single color image can be realized only by adjusting that the panel detection switch unit and the crack detection switch unit 200 connected to all the data lines corresponding to a certain color pixel receive valid switch signals (i.e., transistors in the panel detection switch unit and the crack detection switch unit 200 can be turned on), and the panel detection switch unit and the crack detection switch unit 200 connected to all the data lines corresponding to other color pixels receive invalid switch signals. For example, when the display effect of a red pure color image needs to be detected, the display of a red image can be realized only by adjusting the red switch signal output terminal SWR to output an effective switch signal and adjusting the green switch signal output terminal SWG and the blue switch signal output terminal SWB to output an ineffective switch signal.
In particular, when the pixels corresponding to each color pixel in the display panel are arranged in a complex manner, and the panel detection switch unit further includes the second panel detection switch unit 120, the switch control unit 400 is further configured to input opposite control signals to two control terminals of the same second panel detection switch unit 120, respectively.
For example, as shown in fig. 1 to 4, the display panel is in a P-arrangement (Pentile arrangement), and the second panel detection switch unit 120 including the second transistor T2 and the third transistor T3 is used to connect one data line (i.e., the data line data1, the data line data3, the data line data5, the data line data7) corresponding to red and blue at the same time:
during the display of the blue solid-color image, the red switch signal output terminal SWR continuously outputs an active switch signal (e.g., a low level signal), and the red gray-scale signal output terminal CTDR corresponding to the red sub-pixel outputs an inactive data signal (e.g., a high level signal), so that the red sub-pixel does not emit light. The blue switching signal output terminal SWB outputs an active switching signal (e.g., a low level signal) when the gate driving circuit scans a row corresponding to the blue pixel, and outputs an inactive switching signal when the gate driving circuit scans a row corresponding to the red pixel. Therefore, only when the gate driving circuit scans the row corresponding to the blue pixel, the gray scale signal output by the blue gray scale signal output terminal CTDB of the display control unit 300 is output to the data line, thereby realizing the display of the blue pure color image.
During the display of the red solid image, the blue switch signal output terminal SWB continuously outputs an active switch signal (e.g., a low level signal), and the blue gray scale signal output terminal CTDB corresponding to the blue sub-pixel outputs an inactive data signal (e.g., a high level signal), so that the blue sub-pixel does not emit light. The red switch signal output terminal SWB outputs an active switch signal when the gate driving circuit scans a row corresponding to the red pixel, and the red switch signal output terminal SWR outputs an inactive switch signal when the gate driving circuit scans a row corresponding to the blue pixel. Therefore, only when the gate driving circuit scans the row corresponding to the red pixel, the gray scale signal output by the red gray scale signal output end CTDR of the display control unit 300 is output to the data line, so that the display of the red pure color image is realized.
In order to improve the stability of the gray scale signals and the switching signals, it is preferable that the display panel detection circuit 10 includes two display control units 300 and two switching control units 400, as shown in fig. 3, 4, and 6, and respective output ports of the two display control units 300 and the two switching control units 400 are electrically connected to each other in a one-to-one correspondence manner, and are used for providing the same gray scale signals and switching signals.
The magnitude of the gray scale signal output by the display control unit 300 is not particularly limited in the present invention, and for example, in order to facilitate the detection of the defect of the display panel, it is preferable that the display control unit 300 is capable of supplying the same gray scale voltage to the input terminal of each of the panel detection switch units and the input terminal of each of the crack detection switch units 200.
In order to avoid that the potential does not change after the first edge test line is disconnected to affect the detection result, preferably, as shown in fig. 1 to 7, the display panel detection circuit 10 further includes an on-resistance R, a first end of the on-resistance R is electrically connected to the first control end of the crack detection switch unit 200, and a second end of the on-resistance R is electrically connected to the reference level, and is configured to adjust the potential of the first control end of the crack detection switch unit 200 to the potential of the reference level when the first edge test line does not electrically connect the first control end of the crack detection switch unit 200 to the edge test signal output end of the control unit, so that the input end of the crack detection switch unit 200 is disconnected from the output end of the crack detection switch unit 200.
In the present invention, the potential of the reference level is not particularly limited as long as the two poles of the transistor in the crack detection switch unit 200 can be turned off, and for example, when the transistor in the crack detection switch unit 200 is a P-type transistor, the reference level may be the high-level signal terminal VGH. The resistance of the on-resistance R needs to be large enough, when the first edge test line is in an on state, the reference level VGH is connected to the edge test signal output end PCD through the on-resistance R, a weak current flows through the on-resistance R, and the potential on the first edge test line is not affected, and when the first edge test line is disconnected, the potential on the first edge test line is directly raised to the reference level VGH, so that the third transistor T3 of the crack detection switch unit 200 is disconnected.
The present invention does not specifically limit the potential of the edge test signal output end PCD _ VGL, and the potential may be set as long as the two electrodes of the transistor in the crack detection switch unit 200 can be turned on, for example, when the transistor in the crack detection switch unit 200 is a PNP transistor, the edge test signal output end PCD _ VGL may be a low-level signal end VGL.
As the second aspect of the present invention, there is also provided a display device, the display device includes a display panel 30 and the display panel inspection circuit 10 described in the previous embodiments, the display panel 30 includes a display area a1 for displaying and an edge area surrounding the display area, the display panel 30 includes a plurality of data lines (i.e. data line data1 to data line data8 in the figure), the display panel 30 includes at least one first edge test line disposed at the edge area of the display panel, the output terminal of the panel inspection switch unit is electrically connected to the first data line (i.e. data line 1 to data line data3 in the figure and data line data5 to data line data7) of the display panel 30 corresponding to the panel inspection switch unit, the output terminal of the crack inspection switch unit 200 is electrically connected to the second data line (i.e. data line 4 and data line 8 in the figure) of the display panel 30 corresponding to the crack inspection switch unit 200, the first edge test line is arranged at the edge region of the display panel.
When the display panel detection circuit 10 of the present invention performs the detection function, each gate line of the display panel normally performs scanning, and the source driving circuit 20 for supplying a data signal to each data line of the display panel does not operate. The output terminal of each panel detection switch unit of the display panel detection circuit 10 and the output terminal of the crack detection switch unit 200 respectively replace each port of the source drive circuit 20 to provide the data line with the gray scale signal output by the display control unit 300, and the display panel displays a predetermined image by using the gray scale signal, so that whether the display panel displays a predetermined pattern can be judged by means of human eye observation or machine recognition, and a display problem can be found according to the difference between an actual display image and the predetermined image.
Moreover, when the edge of the display panel is broken, the first edge test line arranged on the edge area is also broken, so that the first control end of the crack detection switch unit 200 cannot receive the edge test signal, and the data line corresponding to the crack detection switch unit 200 cannot load a predetermined gray scale voltage to the corresponding data line, so that a row of pixels corresponding to the crack detection switch unit 200 in a display image has a gray scale abnormal condition, and finally whether the edge breakage defect occurs is judged by means of human eye observation or machine identification, and the like, so that the simultaneous detection of the display problem and the edge breakage defect can be realized.
In order to cope with display panels with different structures and improve the adaptability of the display panel detection circuit 10, preferably, as shown in fig. 1 to 4, the display panel 30 includes a plurality of pixel units arranged in rows and columns, the pixel units in columns include first pixel unit columns (i.e. data line data1, data line data3, data line data5 and data line data7 in the figure) and second pixel unit columns (i.e. data line data2, data line data4, data line data6 and data line data8) which are alternately arranged, and the display panel detection circuit 10 is the display panel detection circuit 10 including the second panel detection switch unit 120 as described above.
The first pixel unit column comprises first color pixel units and second color pixel units (for example, the first color and the second color can be blue and red in the figure) which are alternately arranged, and the second pixel unit column comprises third color pixel units (for example, the third color can be green in the figure);
the data line corresponding to at least one second pixel unit column is electrically connected to the output terminal of the crack detection switch unit 200 (as shown in the figure, the data line data4 is electrically connected to the output terminal of the crack detection switch unit 200);
the first panel detection switch unit 110 is electrically connected to the data line corresponding to the first pixel unit column;
the second panel detection switch unit 120 is electrically connected to the data line corresponding to at least one second pixel unit column.
The connection method provided by the present invention can deal with the situation that the same data line corresponds to pixel units of different colors, and the specific beneficial effects have been described in the previous embodiment, and are not described herein again.
In order to avoid the interference of the display panel detection circuit 10 on the signals in the circuit for realizing the normal display function, the display panel detection circuit 10 of the present invention preferably needs to be disconnected from the data lines of the display panel after the detection is completed. Specifically, the switch control unit 400 (or other means for generating the switch signal) is further configured to continuously input an invalid switch signal (for example, when the transistor in the above unit is a P-type transistor, the invalid switch signal is a high level signal) to the control terminal of the panel detection switch unit and the second control terminal of the crack detection switch unit 200 after the detection task before the display panel is shipped from the factory, so that the control terminal of the panel detection switch unit and the input terminal of the crack detection switch unit 200 are disconnected from the data line.
However, the inventor considers that the first edge test line configured on the display panel is idle, which may cause a waste of the display panel space, in this case, in order to improve the utility of the first edge test line, preferably, as shown in fig. 7, the display panel detection circuit 10 includes two display control units 300 and two first edge test lines, and the display panel further includes a second edge test line (i.e. a horizontal thickened line connecting two ends of the bottom of fig. 7 to the edge test signal output terminals PCD _ VGL of the two display control units 300, respectively), and two ends of the second edge test line PCD are electrically connected to the edge test output terminals OUT of the two first edge test lines, respectively;
the display device further includes a source driving circuit 20 for supplying predetermined gray-scale signals to the data lines (data1 to data8) of the display panel 30, and the source driving circuit 20 includes two edge detection signal terminals PCD electrically connected to edge test input terminals PCD IN of the two first edge test lines, respectively, for applying an edge test voltage to the first edge test line and the second edge test line connected between the two edge detection signal terminals PCD.
The bold line in fig. 7 is a schematic diagram of a loop formed by the first edge test line and the second edge test line, and the source driver circuit 20 can apply an edge test voltage to the loop formed by the first edge test line and the second edge test line through the two edge detection signal terminals PCD and derive a current passing through the loop. And then, the equivalent resistance of the loop can be calculated by a worker or corresponding automatic detection equipment according to the edge test voltage and the passing current, when the first edge test line or the second edge test line is broken, the loop formed by the first edge test line and the second edge test line is broken, and the equivalent resistance of the loop is infinite, so that whether the edge of the display panel 30 is broken or not can be judged through testing the equivalent resistance of the loop.
According to the invention, through the second edge test line and the edge detection signal end PCD in the source electrode drive circuit 20, the first edge test line can continue to play a role in detecting the edge of the display panel 30 after the display panel detection circuit 10 is disconnected from the data line, so that the utilization rate of the space on the display panel 30 is improved, a detection circuit for eliminating edge fracture faults when faults occur after delivery is provided for the display device, and the fault detection performance of the display device is improved.
The present invention is not particularly limited as to how the display panel detection circuit 10 is manufactured, and the display panel detection circuit 10 may be manufactured on a display substrate of the display panel 30, for example. Preferably, as shown in fig. 1 to 7, the panel detection switch unit and the crack detection switch unit 200 of the display panel detection Circuit 10 are formed in a region where the data line passes, the display control unit 300 and the switch control unit 400 of the display panel detection Circuit 10 are formed in an edge region of the display panel 30, and the display control unit 300 and the switch control unit 400 are connected to the panel detection switch unit and the crack detection switch unit 200 through a Flexible Printed Circuit Board (FPC).
In the present invention, the display control unit 300 and the switch control unit 400 are connected to the panel detection switch unit and the crack detection switch unit 200 through a flexible wiring board, and thus when the switch control unit 400 cannot effectively continuously input an invalid switch signal to the control terminal of the panel detection switch unit and the second control terminal of the crack detection switch unit 200, the flexible wiring board can be directly detached to disconnect the display control unit 300 from the data lines.
As a third aspect of the present invention, there is also provided a detection method of a display panel for detecting the display panel 30 described in the previous embodiment, the detection method including the following first detection steps performed synchronously at least for a first predetermined period of time:
inputting an edge test signal to an edge test input end PCD IN of the first edge test line;
inputting gray scale signals generated according to a preset detection image to the input end of the panel detection switch unit and the input end of the crack detection switch unit 200;
corresponding switch signals are input to the control end of the panel detection switch unit and the second control end of the crack detection switch unit 200, so that the panel detection switch unit and the crack detection switch unit 200 output the gray scale signals to each data line of the display panel 30 under the control of the switch signals, so that the display panel 30 displays the preset detection image.
It should be noted that, each step IN the first detection step may occur simultaneously, or the step of inputting the edge test signal by the edge test input end PCD IN may occur only for a period of time (i.e. the first predetermined period of time) IN the synchronous occurrence of the remaining two steps. For example, the first predetermined period of time may be a period of time until the step of inputting the grayscale signal and the corresponding switching signal proceeds to the middle, i.e., the detection of the edge crack defect is started on the way to detect the display problem of the display panel. The advantage of this is that the worker or the automatic detection device can better compare the detection state of the edge crack with the non-detection state of the edge crack, and the display screen of the display panel is distinguished, for example, after inputting the edge test signal to the edge test input end PCD IN of the first edge test line within the first predetermined time period, the pixel units on the data line corresponding to the first edge test line all have a dark line fault, and after stopping inputting the edge test signal to the first edge test line at the end of the first predetermined time period, the dark line fault still exists, and it can be determined that the dark line fault is actually a display problem of the display panel itself, and is not caused by the edge crack problem.
The preset detection picture is not particularly limited as long as the defect inspection can be facilitated, and preferably, the preset detection picture can be a red pure-color picture, a green pure-color picture or a blue pure-color picture. As to how to provide the gray scale signal and the switch signal when displaying the pure color default detection picture, the present invention has been described in the previous embodiments, and is not described herein again.
In practical application of the method, the method should further include, at the staff side or the automated inspection equipment side:
the worker views the display screen and compares the difference between the display screen and the predetermined screen, or takes a picture by the machine and compares the difference between the display screen and the predetermined screen. When the pixel unit controlled by the data line corresponding to the crack detection switch unit 200 does not display the predetermined gray scale, it is determined that the edge fracture defect occurs in the display panel 30; when other deviations occur between the display screen and the predetermined screen, other display problems of the display panel 30 are determined by the staff or the machine according to the actual situation.
In order to improve the practicability of the first edge testing line, preferably, as shown in fig. 7, the display device is the display device including the second edge testing line, and the method for detecting the display panel further includes a second detecting step performed after the first detecting step and at least within a second preset time period, where the second detecting step includes:
inputting an invalid switch signal to a control terminal of the panel detection switch unit and a second control terminal of the crack detection switch unit;
an edge test voltage is applied to the edge test input terminals PCD IN of the two first edge test lines through the two edge detection signal terminals PCD of the source driving circuit 20, and a current flowing through the first edge test line and the second edge test line connected between the two edge detection signal terminals PCD is detected.
It should be noted that the second preset time period is after the first preset time period (that is, the step of performing edge crack defect detection by using the edge detection signal terminal PCD in the source drive circuit 20 occurs after the step of performing display problem detection and edge crack defect detection by using the display panel detection circuit 10). In practical application of the method, the method should further include, at the staff side or the automated inspection equipment side:
and calculating the equivalent resistance of a loop formed by the first edge test line and the second edge test line according to the edge test voltage and the passing current, and judging that the edge of the display panel 30 is broken when the equivalent resistance of the loop is infinite.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (10)
1. A display panel detection circuit is used for detecting a display panel, the display panel comprises at least one first edge test line arranged at the edge area of the display panel, and the display panel detection circuit is characterized by comprising a display control unit, a plurality of panel detection switch units and at least one crack detection switch unit, wherein the display control unit is used for outputting gray scale signals capable of driving the display panel to display a preset image;
the input end of the panel detection switch unit is used for receiving the gray scale signal output by the display control unit, the output end of the panel detection switch unit is used for being electrically connected with the data line of the display panel, and when the control end of the panel detection switch unit receives an effective switch signal, the input end of the panel detection switch unit is conducted with the output end of the panel detection switch unit;
the edge test signal output end of the display control unit is used for outputting an edge test signal to the edge test input end of the first edge test line;
the first control end of the crack detection switch unit is used for being electrically connected with the edge test output end of the first edge test line, the input end of the crack detection switch unit is used for receiving gray scale signals output by the display control unit, the output end of the crack detection switch unit is used for being electrically connected with the data line of the display panel, and the crack detection switch unit is used for conducting the input end of the crack detection switch unit with the output end of the crack detection switch unit when the first control end of the crack detection switch unit receives edge test signals and the second control end of the crack detection switch unit receives effective switch signals;
the output end of the panel detection switch unit and the output end of the crack detection switch unit are respectively and electrically connected with different data lines.
2. The display panel detection circuit according to claim 1, wherein the panel detection switch unit includes a first panel detection switch unit, the first panel detection switch unit includes a first transistor, a gate of the first transistor is formed as a control terminal of the first panel detection switch unit, a first pole of the first transistor is formed as an input terminal of the first panel detection switch unit, and a second pole of the first transistor is formed as an output terminal of the first panel detection switch unit.
3. The display panel detection circuit according to claim 2, wherein the panel detection switch unit further includes a second panel detection switch unit, the control terminal of the second panel detection switch unit includes a first control terminal and a second control terminal, the input terminal of the second panel detection switch unit includes a first input terminal and a second input terminal, the output terminal of the second panel detection switch unit includes a first output terminal and a second output terminal, the second panel detection switch unit includes a second transistor and a third transistor, a gate of the second transistor is formed as the first control terminal of the second panel detection switch unit, a first pole of the second transistor is formed as the first input terminal of the second panel detection switch unit, and a second pole of the second transistor is formed as the first output terminal; a gate electrode of the third transistor is formed as a second control terminal of the second panel detection switch unit, a first pole of the third transistor is formed as a second input terminal of the second panel detection switch unit, and a second pole of the third transistor is formed as a second output terminal of the second panel detection switch unit.
4. The display panel detection circuit according to claim 1, wherein the crack detection switch unit includes a fourth transistor and a fifth transistor, a gate of the fourth transistor is formed as a first control terminal of the crack detection switch unit, a first pole of the fourth transistor is formed as an input terminal of the crack detection switch unit, a second pole of the fourth transistor is electrically connected to a first pole of the fifth transistor, a gate of the fifth transistor is formed as a second control terminal of the crack detection switch unit, and a second pole of the fifth transistor is formed as an output terminal of the crack detection switch unit.
5. The display panel detection circuit according to any one of claims 1 to 4, further comprising a switch control unit for supplying a switch signal to a control terminal of each panel detection switch unit and a second control terminal of each crack detection switch unit.
6. A display device, comprising a display panel and the display panel detection circuit of any one of claims 1 to 5, wherein the display panel comprises a display area for displaying and an edge area surrounding the display area, the display panel comprises a plurality of data lines, the display panel comprises at least one first edge test line arranged at the edge area of the display panel, the plurality of data lines comprises a plurality of first data lines corresponding to the plurality of panel detection switch units one by one, the display panel further comprises at least one second data line corresponding to the at least one crack detection switch unit one by one, the output end of the panel detection switch unit is electrically connected with the first data line corresponding to the panel detection switch unit, the output end of the crack detection switch unit is electrically connected with the second data line corresponding to the crack detection switch unit, the first edge test line is arranged at an edge region of the display panel.
7. The display device according to claim 6, wherein the display panel includes a plurality of pixel units arranged in rows and columns, the plurality of columns of pixel units include first pixel unit columns and second pixel unit columns alternately arranged, the display panel detection circuit is the display panel detection circuit according to claim 3,
the first pixel unit column comprises first color pixel units and second color pixel units which are alternately arranged, and the second pixel unit column comprises third color pixel units;
the data lines corresponding to at least one row of the second pixel unit rows are electrically connected with the output end of the crack detection switch unit;
the first panel detection switch unit is electrically connected with the data line corresponding to the first pixel unit column;
the second panel detection switch unit is electrically connected with the data line corresponding to at least one second pixel unit column.
8. The display device according to claim 6 or 7, wherein the display panel detection circuit includes two of the display control units and two of the first edge test lines, and the display panel further includes a second edge test line, and both ends of the second edge test line are electrically connected to edge test output ends of the two of the first edge test lines, respectively;
the display device further comprises a source electrode driving circuit used for providing preset gray scale signals for each data line of the display panel, wherein the source electrode driving circuit comprises two edge detection signal ends, the two edge detection signal ends are respectively electrically connected with the edge test input ends of the two first edge test lines and are used for loading edge test voltage to the first edge test line and the second edge test line which are connected between the two edge detection signal ends.
9. A method for detecting a display panel in a display device according to any one of claims 6 to 8, the method comprising the following first detection steps performed synchronously at least for a first predetermined period of time:
inputting an edge test signal to an edge test input end of the first edge test line;
inputting gray scale signals generated according to a preset detection image to the input end of the panel detection switch unit and the input end of the crack detection switch unit;
inputting corresponding switch signals to the control end of the panel detection switch unit and the second control end of the crack detection switch unit, so that the panel detection switch unit and the crack detection switch unit output the gray scale signals to each data line of the display panel under the control of the switch signals, and the display panel displays the preset detection image.
10. The method for inspecting a display panel according to claim 9, wherein the display device is the display device according to claim 8, the method further comprising a second inspecting step performed after the first inspecting step and at least within a second preset time period, the second inspecting step comprising:
inputting an invalid switch signal to a control terminal of the panel detection switch unit and a second control terminal of the crack detection switch unit;
and loading edge test voltage to edge test input ends of two first edge test lines through two edge test signal ends of the source electrode driving circuit, and detecting current flowing through the first edge test line and the second edge test line connected between the two edge test signal ends.
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| CN111307867B (en) * | 2020-02-21 | 2022-12-02 | 京东方科技集团股份有限公司 | Display panel, crack detection method thereof and display device |
| CN111509026B (en) * | 2020-05-27 | 2023-02-07 | 京东方科技集团股份有限公司 | Display panel, crack detection method thereof and display device |
| CN111583842A (en) * | 2020-05-29 | 2020-08-25 | 京东方科技集团股份有限公司 | Display panel, display device and disconnection detection method thereof |
| CN112419947B (en) * | 2020-11-20 | 2023-05-26 | 武汉天马微电子有限公司 | Display panel, crack detection method thereof and display device |
| CN112562507B (en) * | 2020-12-03 | 2022-07-12 | Tcl华星光电技术有限公司 | Display panel and detection method thereof |
| CN112419949B (en) * | 2020-12-15 | 2022-04-05 | 武汉华星光电半导体显示技术有限公司 | Display panel and display device |
| CN113450652B (en) * | 2021-06-29 | 2022-12-09 | 京东方科技集团股份有限公司 | Panel crack detection assembly, display panel and display device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105938698A (en) * | 2015-03-04 | 2016-09-14 | 三星显示有限公司 | Display panel and method of testing the same |
| EP3330951A2 (en) * | 2016-12-05 | 2018-06-06 | Samsung Display Co., Ltd. | Display device |
| CN108153017A (en) * | 2016-12-06 | 2018-06-12 | 三星显示有限公司 | Display device |
| CN108417561A (en) * | 2018-03-06 | 2018-08-17 | 京东方科技集团股份有限公司 | A kind of display panel and display device |
| CN109697947A (en) * | 2019-02-26 | 2019-04-30 | 昆山国显光电有限公司 | The method of display device and crackle sensing |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102372208B1 (en) * | 2017-08-21 | 2022-03-08 | 삼성디스플레이 주식회사 | Display device |
-
2019
- 2019-05-31 CN CN201910470872.7A patent/CN110136618B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105938698A (en) * | 2015-03-04 | 2016-09-14 | 三星显示有限公司 | Display panel and method of testing the same |
| EP3330951A2 (en) * | 2016-12-05 | 2018-06-06 | Samsung Display Co., Ltd. | Display device |
| CN108153017A (en) * | 2016-12-06 | 2018-06-12 | 三星显示有限公司 | Display device |
| CN108417561A (en) * | 2018-03-06 | 2018-08-17 | 京东方科技集团股份有限公司 | A kind of display panel and display device |
| CN109697947A (en) * | 2019-02-26 | 2019-04-30 | 昆山国显光电有限公司 | The method of display device and crackle sensing |
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