Patent Grant
12198584
The invention relates to a display panel and a method for detecting the same, and particularly, to a display panel and a method for detecting the same, a display device and a storage medium capable of detecting on the premise of ensuring integrity of the display panel.
With development of science and technology, the display devices are widely applied to many electronic products, such as, mobile phones, tablet computers, watches, vehicles and the like.
After the existing display panels are produced, if analytical test shall be performed on the products (for example, coping with customer complaint analysis or other abnormal analysis), it is often implemented by the way of destroying the products (for example, dismantling the optical glass (CG) to facilitate contacting test points on the display panel through a probe), such that testing causes damage to the products, or testing difficulty is increased, and operation is not convenient.
Therefore, how to achieve product testing on the premise of maintaining integrity of the display panel without damaging the display panel is actually one of the problems to be solved.
The embodiments of the invention provide a display panel and a method for detecting the same, a display device and a storage medium, which can test the display panel conveniently, and improve testing efficiency on the premise of ensuring integrity of the display panel.
The display panel in one embodiment of the invention comprises a substrate having a display area; a plurality of pixel units disposed in the display area; a plurality of signal lines electrically connected to the plurality of pixel units to transmit driving signals to the plurality of pixel units; a charge coupling unit corresponding to at least a part of the plurality of signal lines for coupling the driving signals into potential signal; and a voltage detection unit electrically connected to the charge coupling unit for receiving the potential signal and determining the driving signals.
In the display panel, the driving signals are timing pulse signals, and the potential signal is a tiered voltage.
In the display panel, the voltage detection unit comprises a determination module for determining whether the tiered voltage is within a preset voltage range.
In the display panel, the voltage detection unit further comprises a result output unit for outputting a feedback signal when the tiered voltage is not within the preset voltage range.
In the display panel, the tiered voltage comprises a plurality of step voltages, the preset voltage range comprises a plurality of voltage intervals, and each step voltage corresponds to one voltage interval.
In the display panel, the plurality of signal lines comprise a first group of signal lines and a second group of signal lines, the voltage detection unit comprises a first detection unit, and the charge coupling unit comprises a first coupling unit electrically connected to the first detection unit and corresponding to the first group of signal lines.
In the display panel, the plurality of signal lines further comprise a third group of signal lines, the voltage detection unit further comprises a second detection unit, and the charge coupling unit comprises a second coupling unit electrically connected to the second detection unit and corresponding to the third group of signal lines.
In the display panel, the display panel further comprises a driving circuit electrically connected to the plurality of signal lines for sequentially supplying the timing pulse signal to the plurality of signal lines within one driving period.
In the display panel, the display panel further includes a peripheral area at least on one side of the display area, and the display panel further comprises: a driving element located in the peripheral area, wherein the voltage detection unit is provided on the driving element.
In the display panel, the driving element comprises a first pin electrically connected to the charge coupling unit and the voltage detection unit, respectively.
In the display panel, the driving element further comprises a charge releasing unit electrically connected to the charge coupling unit.
In the display panel, the driving element comprises a second pin electrically connected to the charge coupling unit and the charge releasing unit, respectively.
In the display panel, the first pin and the second pin are the same pin or different pins.
In the display panel, a display frame comprises a first time period where the voltage detection unit determines the driving signals, and a second time period where the charge releasing unit releases coupled charge in the charge coupling unit.
In the display panel, the first time period is a data refresh phase, and the second time period is a blanking phase.
In the display panel, the driving element further comprises a switch unit disposed between the charge coupling unit and the voltage detection unit as well as the charge releasing unit, wherein in the first time period, the switch unit is turned on between the charge detection unit and the charge coupling unit, and turned off between the charge releasing unit and the charge coupling unit; and in the second time period, the switch unit is turned off between the charge detection unit and the charge coupling unit, and turned on between the charge releasing unit and the charge coupling unit.
In the display panel, the display panel further comprises: a signal detection line at least partially overlapping the plurality of signal lines; wherein the charge coupling unit is disposed between the plurality of overlapped signal lines and the signal detection line.
A method for detecting the display panel in one embodiment of the invention is configured to detect the display panel, the method comprising: acquiring the potential signal of the charge coupling unit; and determining whether the potential signal is within a preset voltage range.
In the detection method, the potential signal is a tiered voltage, and the method further comprises: outputting a feedback signal when the tiered voltage is not within the preset voltage range.
In the detection method, the method further comprises: releasing coupled charge in the charge coupling unit.
A display device in one embodiment of the invention comprises any of the display panel described above.
A storage medium in one embodiment of the invention is configured to store computer programs, wherein the computer programs are configured to perform any of the detection method described above.
Hereinafter the invention is described in details combining with the accompanying drawings and specific embodiments, but the invention is not limited thereto.
Hereinafter structure principle and working principle of the invention are described in details combining with the accompanying drawings:
In the invention, since the corresponding at least a part of the signal lines GL1, GL2, GL3, GL4, . . . , GLN-1, and GLN on the display panel 100 are provided with the charge coupling unit 102 to couple the driving signals G1, G2, G3, G4, . . . , GN-1 and GN on the signal lines GL1, GL2, GL3, GL4, . . . , GLN-1, and GLN into potential signal, and then whether the driving signals are normal is determined via the voltage detection unit 103 according to the received potential signal, if analytical test shall be performed on the display panel 100 after the display panel 100 is produced, testing may be conveniently completed without damaging the display panel 100 to determine whether the driving signals G1, G2, G3, G4, . . . , GN-1 and GN are normal, and maintain integrity of the display panel 100, and the testing process is convenient and fast.
In one embodiment, the display panel 100 further includes a driving circuit 104 electrically connected to the signal lines GL1, GL2, GL3, GL4, . . . , GLN-1, and GLN, the driving signals G1, G2, G3, G4, . . . , GN-1 and GN of the signal lines are supplied by the driving circuit 104, and the driving signals G1, G2, G3, G4, . . . , GN-1 and GN supplied by the driving circuit 104 are timing pulse signals. Moreover, the driving circuit 104 sequentially supplies the driving signals to the signal lines GL1, GL2, GL3, GL4, . . . , GLN-1, and GLN, respectively within one driving period, and the potential signal may be a tiered voltage. As shown in
After the display panel 100 is produced, the invention may conveniently determine whether the driving signals G1, G2, G3, G4, . . . , GN-1 and GN are normal without damaging the display panel 100 via the charge coupling unit 102 and the voltage detection unit 103, and the driving signals G1, G2, G3, G4, . . . , GN-1 and GN are supplied by the driving circuit 104, such that the invention may conveniently determine whether the driving circuit 104 is normal, and maintain integrity of the display panel 100 without damaging the display panel 100, and the testing process is convenient and fast.
In one embodiment of the invention, the display panel 100 further includes a driving element 105 disposed in the peripheral area BA, but the invention is not limited thereto, and the voltage detection unit 103 may be disposed in the driving element 105. In another embodiment, the voltage detection unit 103 also may be set separately, and the invention is explained only taking the driving circuit 104 on one side of the display area AA for example. Of course, the driving circuit 104 also may be multilateral driven, but the invention is not limited thereto. In one embodiment, the driving element 105 comprises a driver IC for driving the display panel 100, or a combination of the driver IC and a flexible circuit board (FPC) electrically connected or a chip on film (COF).
In one embodiment, the charge coupling unit 102 is formed of a plurality of coupling capacitors together. Specifically, as shown in
In one embodiment, the driving circuit 104 is located in the peripheral area BA, the signal lines GL1, GL2, GL3, GL4, . . . , GLN-1, and GLN comprises a portion in the peripheral area BA and a portion in the display area AA (not shown), and the signal detection line 106 is located in the peripheral area BA and across over the portion of the signal lines GL1, GL2, GL3, GL4, . . . , GLN-1, and GLN in the peripheral area BA, such that it is unnecessary to additionally design the circuits in the display area AA, and the structure is simple.
In the invention, taking the coupling capacitors for example, other coupling ways also can be used, and only if the driving signals G1, G2, G3, G4, . . . , GN-1 and GN on the signal lines GL1, GL2, GL3, GL4, . . . , GLN-1, and GLN are coupled into potential signal, the invention may be implemented, but the invention is not limited thereto.
Combining
Combining
Further, as shown in
When applied to a terminal display device, the display panel 100 of the invention may make electrical monitoring in the data refresh time period using the charge coupling unit 102 and the voltage detection unit 103 via charge coupling effect of the driving signals outputted by the driving circuit 104, remove the coupled charge in the circuits to restore at the blanking phase, so as to electrically monitor the driving circuit 104, and determine via the driving element 105, and since the driving element 105 may communicate with the terminal display device, such as, outputting the feedback signal, the terminal display device can acquire conditions of the driving circuit 104 of the current display panel 100.
As shown in
Further, the first pin 1051, the second pin 1053 and the voltage detection unit 103, the charge releasing unit 1052 further comprise a switch unit 1054 therebetween for controlling on and off between the first pin 1051 and the voltage detection unit 103, and controlling on and off between the second pin 1053 and the voltage releasing unit 1052, so as to control whether determining coupled potential in the charge coupling unit 102 or emptying coupled charge in the charge coupling unit 102.
Specifically, as shown in
In
Of course, the display panel further has other components, and the details are not described here.
In the embodiment of
In another embodiment, other group ways also may be used. For example, the signal lines GL1 to GLk are the first group of signal lines, and the signal lines GLk+1 to GLN are the second group of signal lines, where 1<k<N. The driving circuit 104 supplies the driving signals to the first group of signal lines and the second group of signal lines. Correspondingly, the first group of signal lines and the second group of signal lines are provided with the signal detection lines 106, respectively. The charge coupling unit 102 comprises a first coupling unit and a second coupling unit. The first coupling unit comprises coupling capacitors C1, C2, . . . , Ck formed between the corresponding signal detection line 106 and the first group of signal lines, and the second coupling unit comprises coupling capacitors Ck+1, Ck+2, . . . , CN formed between the corresponding signal detection line 106 and the second group of signal lines. The voltage detection unit 103 detects the driving signals of the first group of signal lines and the second group of signal lines to determine whether the driving circuit 104 is normal. In other embodiments, the signal detection line 106 may be provided only for the first group of signal lines, such that the voltage detection unit 103 only detects the driving signals of the first group of signal lines. Of course, the signal detection line 106 also may be provided only for the second group of signal lines, such that the voltage detection unit 103 only detects the driving signals of the second group of signal lines, but the invention is not limited thereto.
Of course, the signal lines GL1, GL2, GL3, GL4, . . . , GLN-1 and GLN also may be divided into more groups, such as, three groups shown in
Alternatively, in another embodiment, a certain number of signal lines can be selected to be one group, and the signal lines that easily have abnormal state also may be only detected after pooled analysis based on detection results, such that the signal detection lines 106 are only across over a part of signal lines GL1, GL2, GL3, GL4, . . . , GLN-1 and GLN, for example, across over the signal lines GLP, GLP+1, . . . , GLQ, where P≥1, and Q≤N, such that the voltage detection unit 103 only detects the driving signals of this part of signal lines GLP, GLP+1, . . . , GLQ, but the invention is not limited thereto.
The invention further provides a method for detecting a display panel, which is configured to detect the display panel 100. Combining
Specifically, in the display panel 100, after the charge coupling unit 102 couples the driving signals G1, G2, G3, G4, . . . , GN-1 and GN into potential signal, the signal detection line 106 transmits the potential signal to a determination module 1031 for determining whether a tiered voltage V of the potential signal is within a preset voltage range. For example, whether the driving signals G1, G2, G3, G4, . . . , GN-1 and GN are in a normal working state can be determined by determining whether the maximum step voltage VN of the tiered voltage V is within a preset voltage range. If the maximum step voltage VN is within the preset voltage range, it means that the driving signals G1, G2, G3, G4, . . . , GN-1 and GN are in a normal working state, and if the maximum step voltage VN is not within the preset voltage range, it means that one or more of the driving signals G1, G2, G3, G4, . . . , GN-1 and GN are in an abnormal working state, and shall be further determined. Meanwhile, the result output unit 1032 sends a result feedback signal to the driving element 105. In one embodiment, the preset voltage range comprises a plurality of voltage intervals, and each step voltage corresponds to one voltage interval. For example, the step voltage V1 corresponds to a first voltage interval, the step voltage V2 corresponds to a second voltage interval, . . . , and the step voltage VN corresponds to a N-th voltage interval. At this time, each step voltage V1, V2, V3, V4, . . . , and VN shall be determined, respectively, i.e., determining whether the step voltage V1 is located in the first voltage interval, determining whether the step voltage V2 is located in the second voltage interval, . . . , and determining whether the step voltage VN-1 is located in the (N-1)th voltage interval, such that which one or more of the driving signals G1, G2, G3, G4, . . . , GN-1 and GN is determined in the abnormal working state. Meanwhile, the result output unit 1032 sends a feedback signal to the driving element 105, and the determination module 1031 determines the abnormal driving signal lines for feedback.
The charge releasing unit 1052 is electrically connected to the charge coupling unit 102 through the signal detection line 106. In the display panel 100, each display frame FRAME1 and FRAME2 comprises a first time period T1 and a second time period T2. The first time period T1 is a data refresh phase where the signal lines GL1, GL2, GL3, GL4, . . . , GLN-1, and GLN supply the driving signals G1, G2, G3, G4, . . . , GN-1 and GN to the pixel units sequentially, and the second time period T2 is a blanking phase where the charge releasing unit 1052 releases coupled charge in the charge coupling unit 102, so as to facilitate being detected again in the next display frame while not affecting display of the display panel 100. In one embodiment, it may be implemented by connecting the signal detection line 106 to the ground GND, but the invention is not limited thereto.
The invention further provides a display device comprising any of the display panel described above.
The invention further provides a storage medium for storing computer programs, and the computer programs are configured to perform any of the detection method described above.
According to the embodiments of the invention, the charge coupling unit is formed for transmitting the potential signal coupled on the signal lines to the voltage detection unit, and determining whether the potential signal are within a preset voltage range where the driving signals normally work through the signal detection lines across over the signal lines, such that a total tiered voltage can be determined, and each stage of the step voltages in the tiered voltage also can be determined, thereby simplifying the detection process, improving detection efficiency, and ensuring integrity of the product in the detection procedure.
Of course, the invention may further have various other embodiments, and those skilled in the art shall make various corresponding modifications and variations according to the invention without departing from spirit and essence of the invention, but these corresponding modifications and variations shall belong to the protection scope of the appended claims of the invention.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202311029686.2 | Aug 2023 | CN | national |
| Number | Name | Date | Kind |
|---|---|---|---|
| 6795046 | Janssen et al. | Sep 2004 | B2 |
| 20190287475 | Lee | Sep 2019 | A1 |
| Number | Date | Country |
|---|---|---|
| 108962162 | Dec 2018 | CN |
| 108873525 | Sep 2019 | CN |
| 110459155 | Oct 2022 | CN |
