CN113763850A - Bad vertical line positioning circuit and method, display module and television - Google Patents
Bad vertical line positioning circuit and method, display module and television Download PDFInfo
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- CN113763850A CN113763850A CN202111077342.XA CN202111077342A CN113763850A CN 113763850 A CN113763850 A CN 113763850A CN 202111077342 A CN202111077342 A CN 202111077342A CN 113763850 A CN113763850 A CN 113763850A
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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
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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
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/12—Test circuits or failure detection circuits included in a display system, as permanent part thereof
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Abstract
The invention discloses a bad vertical line positioning circuit, a method, a display module and a television, wherein the bad vertical line positioning circuit comprises a pixel array, a data driving circuit, a control circuit and row switching tube units, the number of the row switching tube units is matched with that of the pixel array, the output ends of the row switching tube units are respectively connected with the row input ends of the pixel array, the input ends of the row switching tube units are connected with the output ends of the data driving circuit, and the control ends of the row switching tube units are connected with the control circuit; the control circuit is used for sending a preset column selection signal so that the column switching tube unit controls the pixel array to display a difference vertical line; when the difference vertical line is overlapped with the bad vertical line, the serial number of the row pixel unit displaying the difference vertical line in the pixel array is the row serial number of the bad vertical line. The invention avoids the damage to the data routing in the process of positioning the bad vertical line position.
Description
Technical Field
The invention relates to the field of display driving, in particular to a bad vertical line positioning circuit, a bad vertical line positioning method, a display module and a television.
Background
In the production, transportation or use process of a complete TV set, the problem of poor vertical lines often occurs, as shown in figure 1, a single vertical line is poor or a plurality of vertical lines are poor. If the defective vertical lines are to be detected and analyzed, the specific position of the defective vertical line must be located, i.e., which column the defective vertical line is located in must be located first, so that further analysis can be performed.
At present, in the process of positioning a bad vertical line position, a bad OC (Open cell, a display screen monomer) needs to be detached from the whole TV, and then an optical microscope is used to position which position is bad, as shown in fig. 2, when the vertical line of the whole TV is bad, the TV is positioned to 1355 th data line through the optical microscope, and the data line is broken. However, in the process of finding the position of the bad vertical line under the optical microscope, the data line needs to be punctured under the optical microscope, the oscilloscope is used for signal confirmation, and the puncturing is destructive to the internal data routing of the surface. Therefore, the conventional positioning method has a problem of easily causing damage to the data line.
Disclosure of Invention
The invention mainly aims to provide a bad vertical line positioning circuit, a bad vertical line positioning method, a display module and a television, and aims to solve the problem that data routing is easily damaged in the bad vertical line positioning process.
In order to achieve the purpose, the invention provides a bad vertical line positioning circuit, which comprises a pixel array, a data driving circuit, a control circuit and column switching tube units, wherein the column switching tube units are matched with the number of columns of the pixel array;
the control circuit is used for sending a preset column selection signal so that the column switching tube unit controls the pixel array to display a difference vertical line; when the difference vertical line is overlapped with the bad vertical line, the serial number of the row pixel unit displaying the difference vertical line in the pixel array is the row serial number of the bad vertical line.
Optionally, the column switching tube unit includes a TFT switching tube, an input end of the TFT switching tube is connected to an output end of the data driving circuit, an output end of the TFT switching tube is connected to a corresponding column input end of the pixel array, and a control end of the TFT switching tube is connected to the control circuit.
Optionally, the TFT switching tube is disposed in the display panel.
Optionally, the column switch tube unit includes an MOS tube, an input end of the MOS tube is connected to an output end of the data driving circuit, an output end of the MOS tube is connected to a corresponding column of the pixel array, and a control end of the MOS tube is connected to the control circuit.
Optionally, the MOS transistor is integrated in a data driving circuit.
In addition, in order to achieve the above object, the present invention further provides a method for positioning a bad vertical line, wherein the method comprises the following steps:
sending out a preset column selection signal to enable different vertical lines to appear in the display panel;
and when the difference vertical line is superposed with the bad vertical line, displaying that the serial number of the row pixel unit of the difference vertical line is the row serial number of the bad vertical line.
Optionally, the step of sending out a preset column selection signal to display the differential vertical lines in the display panel includes:
and sending a preset column selection signal, and turning off the corresponding column switching tube unit so as to control the pixel array to display the difference vertical lines in the display panel according to the data signal sent by the data driving circuit.
Optionally, before the step of sending the preset column selection signal to display the differential vertical lines in the display panel, the method further includes:
determining the sequence number interval of the row pixel units in the pixel array corresponding to the bad vertical line according to the position of the bad vertical line in the display panel;
and generating a preset column selection signal according to the sequence number interval.
In addition, in order to achieve the above object, the present invention further provides a display module, where the display module includes a memory, a processor, and a bad vertical line positioning program stored in the memory and capable of running on the processor, and the bad vertical line positioning program is executed by the processor to implement the steps of the bad vertical line positioning method.
In addition, in order to achieve the above object, the present invention further provides a television set, including a display screen and a bad vertical line positioning circuit, where the bad vertical line positioning circuit is configured to determine a column number of a bad vertical line on the display screen, and the bad vertical line positioning circuit is configured as the bad vertical line positioning circuit.
The column switch tube unit is arranged between the data driving circuit and the pixel array, and after the control circuit sends out the preset column selection signal, the corresponding column pixel unit can display the difference vertical line, namely the difference vertical line appears on the display panel. Thereby realized by the position of the bad perpendicular line of software, hardware location, need not walk the line needle detection to data, solved at the in-process of bad perpendicular line position location, walk the problem that the line caused the damage to data easily, moreover, need not dismantle OC from the complete machine, avoided bringing the risk of damage for the OC because of the bad perpendicular line of location yet, also need not use expensive optical microscope, reduced detection cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic illustration of a bad vertical line;
FIG. 2 is a schematic diagram of bad data routing under an optical microscope;
FIG. 3 is a block diagram of an embodiment of a bad vertical line positioning circuit according to the present invention;
FIG. 4 is a schematic diagram of a vertical line of difference according to an embodiment of the present invention;
FIG. 5 is a schematic circuit diagram of an embodiment of a bad vertical line positioning circuit according to the present invention;
fig. 6 is a flowchart illustrating an embodiment of a bad vertical line positioning method according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | |
30 | |
| 20 | |
40 | Column switch tube unit |
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are 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 addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
In the process of producing, transporting or using the complete TV set, the problem of poor vertical lines often occurs. In the process of carrying out the reliability test of the whole machine, the problem of the disadvantage of a single vertical line or a plurality of vertical lines often appears. If the vertical line defects are to be analyzed, after the defective vertical line of the whole machine is taken, the specific position of the vertical line defect must be located, that is, the row number of the row of the defective vertical line needs to be located first, so that further analysis can be performed.
At present, a poorly positioned vertical line requires special large-scale expensive equipment such as an optical microscope, each OM equipment needs to consume millions, and many companies do not have the equipment, need to be outsourced or even cannot perform analysis, and project progress is affected. In addition, in the process of disassembling and assembling the whole machine, a bad OC is easily damaged, and especially in the process of searching for a bad vertical line position under an optical microscope, more vertical line faults are often caused by the fact that a needle is used for scraping glass data routing. Thus, the conventional analysis method has many limitations and disadvantages to be improved.
Based on the above phenomena, the present invention provides a bad vertical line positioning circuit, and referring to fig. 3, in an embodiment, the bad vertical line positioning circuit includes a pixel array 10, a data driving circuit 20, a control circuit 30, and column switching tube units 40 whose number matches the number of columns of the pixel array, output ends of the column switching tube units 40 are respectively connected with column input ends of the pixel array 10, input ends of the column switching tube units 40 are connected with output ends of the data driving circuit 20, and control ends of the column switching tube units 40 are connected with the control circuit 30;
the control circuit 30 is configured to send out a preset column selection signal, so that the column switching tube unit 40 controls the pixel array 10 to display a differential vertical line; when the difference vertical line is overlapped with the bad vertical line, the serial number of the row pixel unit displaying the difference vertical line in the pixel array is the row serial number of the bad vertical line.
In this embodiment, the control circuit 30 may be a timing controller TCON or a system on chip SOC, and issues a column selection signal to the switch tube unit 40 through the TCON or the SOC. The column selection signal may be an off signal for turning off the column switching tube unit, or may be an on signal for turning on the column switching tube unit, and it can be understood that the column selection signal further includes column serial numbers corresponding to the column pixel units in the pixel array 10, so as to turn off or turn on the column switching tube unit with the specified serial number. For example, the column selection signal is: when the column switching tube unit with the column serial number of 1366 is turned off, the column switching tube unit connected to the column pixel unit with the column serial number of 1366 in the pixel array 10 is turned off, the 1366 th column pixel unit cannot receive the data signal output by the data driving circuit 20, and the other column pixel units can still normally receive the data signal output by the data driving circuit 20. Referring to fig. 4, when the data signal is to display a fixed frame or a fixed gray scale, the row pixel unit where the bad vertical line is located cannot be normally displayed due to the line damage, and the bad vertical line a appears, and the 1366 th row pixel unit appears as a different vertical line a' on the display panel because it cannot receive the data signal. Assuming that there is one bad vertical line, at this time, the difference line a' and the bad vertical line a of the 1366 th row of pixel cells are displayed on the panel, it can be determined that the bad vertical line a is not in the 1366 th row; by analogy, when the column selection signal turns off the column switch tube with the column serial number 1355, if only one bad vertical line appears in the panel at the moment, namely the difference vertical line is overlapped with the bad vertical line, the bad vertical line is determined to be in the 1355 th column. When the number of the bad vertical lines is two or more, the row serial number of each bad vertical line can be positioned respectively. Of course, the effect of the differential vertical lines may be brightening or dimming or other effects, and the corresponding setting may be made by the data signal.
It should be noted that the sending of the column selection signal may be sequentially sent according to the column sequence number from small to large or from large to small according to a preset time, or may be sent only according to the sequence number in a certain section of the column interval, or sent according to a certain column sequence number. Specifically, the row number estimation may be performed first according to the position of the bad vertical line on the panel, and then the preset column selection signal may be set according to the estimated row number or the interval of the row number.
The row input ends in the pixel array 10 respectively receive corresponding row scanning signals G, and when the panel displays a fixed picture or a fixed gray scale, the row scanning signals are corresponding driving signals, which is not described herein again.
According to the scheme, the column switching tube unit 40 is arranged between the data driving circuit 20 and the pixel array 10, after the control circuit 30 sends the preset column selection signal, the corresponding column pixel units can display the difference vertical lines, namely the difference vertical lines appear on the display panel, and when the difference vertical lines displayed under the control of the preset column selection signal coincide with the bad vertical lines needing to be positioned, the column serial number of the difference vertical lines can be judged to be the column number of the bad vertical lines. Thereby realized by the position of the bad perpendicular line of software, hardware location, need not walk the line needle detection to data, solved at the in-process of bad perpendicular line position location, walk the line problem that causes the damage to data easily, moreover, no longer need dismantle the OC from the complete machine, avoided bringing the risk of damage for the OC because of the bad perpendicular line of location, the messenger is to the in-process of bad perpendicular line location, does not have secondary damage, and need not use expensive optical microscope, reduced the detection cost.
Further, the column switch unit 40 includes a TFT switch, an input end of the TFT switch is connected to an output end of the data driving circuit 20, an output end of the TFT switch is connected to a corresponding column input end of the pixel array 10, and a control end of the TFT switch is connected to the control circuit 30.
The number of the switch tube units 40 is set according to actual needs, and the types of the switch tubes can be selected according to actual conditions. Referring to fig. 5, taking HD 1368 data traces as an example, the pixel array 10 includes 1368 columns of pixel units, and 1368 switching tube units 40 need to be arranged, that is, 1368 data channels of the data driving circuit 20 are respectively connected with the 1368 columns of pixel units of the pixel array 10 through TFT tubes, so as to output data signals to the pixel array 10. The data driving circuit 20 may include an S-IC (Source driver IC).
In this embodiment, the pixel array 10 can be accurately controlled by the arrangement of the TFT array.
Further, the TFT switch tube is arranged in the display panel. By arranging the TFT tube array in the display panel, the TFT circuit is less prone to damage and is more stable.
Further, the column switch tube unit comprises an MOS tube, an input end of the MOS tube is connected with an output end of the data driving circuit, an output end of the MOS tube is connected with a corresponding column of the pixel array, and a control end of the MOS tube is connected with the control circuit.
Further, the MOS transistor is integrated in the data driving circuit 20. The MOS tube can be integrated in the S-IC, or the S-IC integrated with the MOS tube can be directly selected.
In the scheme, a switch tube is arranged between the surface and the data driving circuit 20 to control the on-off of the corresponding channel according to the code output by the control circuit 30, so that the pixel unit of the channel can be quickly and accurately controlled. The type of the switch tube can be selected according to different control voltages in an actual circuit, and can also be selected according to the position of the switch tube integration.
The invention provides a method for positioning a bad vertical line, and referring to fig. 6, in one embodiment, the method for positioning the bad vertical line comprises the following steps:
step S10, sending out a preset column selection signal to display the difference vertical lines in the display panel;
step S20, when the difference vertical line and the bad vertical line coincide, the serial number of the row pixel unit displaying the difference vertical line is the row serial number where the bad vertical line is located.
The bad vertical line positioning method is applied to the bad vertical line positioning circuit in any one of the above embodiments, the column selection signal includes column serial number information corresponding to the column pixel units in the pixel array 10, and may include a certain column or several columns, and when the column switching tube unit is integrated in a plane or in an S-IC chip, the column selection signal may be preset in the S-IC chip, so as to output a signal different from other columns to the selected column pixel unit, and thus a different vertical line appears in the display panel; the column selection signal may further include an on signal or an off signal for controlling the column switching tube unit to be turned on or off, and the selected column of pixel units outputs a signal different from that of other columns by controlling the column switching tube unit to be turned on or off, that is, a different vertical line appears in the display panel.
In order to make the differential vertical line display more obvious, the display panel may also display a fixed picture, such as a white picture or a specific gray scale, by controlling the data signals input by the rows of the pixel array 10 before the preset column selection signal is sent out.
In this embodiment, by sending the preset column selection signal, the corresponding column pixel units in the pixel array 10 can display the different vertical lines, that is, the different vertical lines appear on the display panel, and when the preset column selection signal controls the displayed different vertical lines to coincide with the bad vertical lines to be positioned, it can be determined that the column number of the different vertical lines is the column number of the bad vertical lines. Thereby realized the location to bad vertical line position, need not walk the detection of line pricking to data, also need not dismantle the OC, avoided can be to the damage that OC and circuit brought among the bad vertical line location process.
Further, the step of sending out the preset column selection signal to display the differential vertical lines in the display panel includes:
and sending a preset column selection signal, and turning off the corresponding column switching tube unit so as to control the pixel array to display the difference vertical lines in the display panel according to the data signal sent by the data driving circuit.
When the column switching tube unit is turned off, the connection between the corresponding column pixel unit in the pixel array and the data driving circuit 20 is disconnected, so that the column pixel unit cannot receive the column data signal, and other column pixel units normally receive the data signal to display the brightness corresponding to the data signal, thereby causing the different vertical lines to appear in the display panel.
Further, before the step of sending out the preset column selection signal to display the differential vertical lines in the display panel, the method further includes:
determining the sequence number interval of the row pixel units in the pixel array corresponding to the bad vertical line according to the position of the bad vertical line in the display panel;
and generating a preset column selection signal according to the sequence number interval.
It is understood that, empirically or with limited implementation, the approximate sequence number interval of the column pixel unit in the pixel array corresponding to the bad vertical line can be estimated according to the position of the bad vertical line in the display panel, and therefore, the column selection signal can be set according to the interval, and the column selection signal can include the column sequence number interval or a certain column sequence number alone.
The method for determining the sequence number interval of the column pixel units in the pixel array corresponding to the bad vertical line according to the position of the bad vertical line in the display panel can be that an image acquisition device is set at the front end of the panel to acquire a panel image displaying the bad vertical line, so that the sequence number interval can be intelligently obtained, and a selection signal can be intelligently sent. So that the positioning of bad vertical lines is quicker, the labor cost is saved, and the detection efficiency is improved.
The invention provides a display module, which comprises a memory, a processor and a bad vertical line positioning program, wherein the bad vertical line positioning program is stored in the memory and can run on the processor, and the bad vertical line positioning program is executed by the processor to realize the steps of each embodiment of the bad vertical line positioning method.
It is understood that the processor may be a control circuit in the display module, such as a timing controller TCON or a system on chip SOC, and the memory may be a memory unit in the TCON or the SOC.
The invention provides a television, which in an embodiment comprises a display screen and a bad vertical line positioning circuit, wherein the bad vertical line positioning circuit is used for determining the row serial number of a bad vertical line on the display screen, and the structure of the bad vertical line positioning circuit can refer to the above embodiment and is not described herein again. It should be noted that, since the television set of this embodiment adopts the technical solution of the above-mentioned bad vertical line positioning circuit, the television set has all the beneficial effects of the above-mentioned bad vertical line positioning circuit.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A bad vertical line positioning circuit is characterized by comprising a pixel array, a data driving circuit, a control circuit and column switching tube units, wherein the column switching tube units are matched with the number of columns of the pixel array, the output ends of the column switching tube units are respectively connected with the column input ends of the pixel array, the input ends of the column switching tube units are connected with the output end of the data driving circuit, and the control ends of the column switching tube units are connected with the control circuit;
the control circuit is used for sending a preset column selection signal so that the column switching tube unit controls the pixel array to display a difference vertical line; when the difference vertical line is overlapped with the bad vertical line, the serial number of the row pixel unit displaying the difference vertical line in the pixel array is the row serial number of the bad vertical line.
2. The defective vertical line positioning circuit of claim 1, wherein the column switch unit comprises a TFT switch, an input terminal of the TFT switch is connected to an output terminal of the data driving circuit, an output terminal of the TFT switch is connected to a corresponding column input terminal of the pixel array, and a control terminal of the TFT switch is connected to the control circuit.
3. The defective vertical line positioning circuit according to claim 4, wherein the TFT switch tube is disposed in the display panel.
4. The defective vertical line positioning circuit of claim 1, wherein the column switch unit comprises MOS transistors, input terminals of the MOS transistors are connected to output terminals of the data driving circuit, output terminals of the MOS transistors are connected to corresponding columns of the pixel array, and control terminals of the MOS transistors are connected to the control circuit.
5. The defective vertical line locating circuit according to claim 4, wherein said MOS transistor is integrated in a data driving circuit.
6. A method for locating a bad vertical line, characterized in that the steps of the locating method comprise:
sending out a preset column selection signal to enable the display panel to display the difference vertical lines;
and when the difference vertical line is superposed with the bad vertical line, displaying that the serial number of the row pixel unit of the difference vertical line is the row serial number of the bad vertical line.
7. The method for locating a defective vertical line according to claim 6, wherein the step of sending out the predetermined column selection signal to make the different vertical lines appear in the display panel comprises:
and sending a preset column selection signal, and turning off the corresponding column switching tube unit so as to control the pixel array to display the difference vertical lines in the display panel according to the data signal sent by the data driving circuit.
8. The method for locating a defective vertical line according to claim 6, wherein before the step of sending out the predetermined column selection signal to display the differential vertical lines in the display panel, the method further comprises:
determining the sequence number interval of the row pixel units in the pixel array corresponding to the bad vertical line according to the position of the bad vertical line in the display panel;
and generating a preset column selection signal according to the sequence number interval.
9. A display module, comprising a memory, a processor and a bad vertical line positioning program stored in the memory and capable of running on the processor, wherein the bad vertical line positioning program when executed by the processor implements the steps of the bad vertical line positioning method according to any one of claims 6 to 8.
10. A television set comprising a display screen and a bad vertical line positioning circuit for determining a column number of a bad vertical line on the display screen, wherein the bad vertical line positioning circuit is configured as the bad vertical line positioning circuit according to any one of claims 1 to 5.
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