CN108305577B - Detection device and detection method for display panel - Google Patents
Detection device and detection method for display panel Download PDFInfo
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- CN108305577B CN108305577B CN201810054605.7A CN201810054605A CN108305577B CN 108305577 B CN108305577 B CN 108305577B CN 201810054605 A CN201810054605 A CN 201810054605A CN 108305577 B CN108305577 B CN 108305577B
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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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Abstract
The invention discloses a detection device and a detection method of a display panel, wherein the device comprises: one end of the first connecting wire is connected with a first connecting end of a power line on the display panel, and the other end of the first connecting wire is connected with a first input end of the driving circuit board; one end of the second connecting wire is connected with a second connecting end of the power wire on the display panel, and the other end of the second connecting wire is connected with a second input end of the driving circuit board; the input end of the first detection line is respectively connected with a first connecting end and a second connecting end of the power line; the input end of the second detection line is connected with the output end of the driving circuit board; and two input ends of the detection module are respectively connected with output ends of a first detection line and a second detection line, and whether the display panel is broken is judged according to signals input by the first detection line and the second detection line. The invention can effectively improve the efficiency and the accuracy of the detection of the display panel.
Description
Technical Field
The invention relates to the technical field of display, in particular to a detection device and a detection method for a display panel.
Background
A screen used in an intelligent terminal such as a mobile phone generally includes cover glass, a touch layer, and a display panel. With the development of touch technology, a touch layer is generally embedded in a display panel at present, which puts higher demands on the manufacturing process of the display panel.
When the display panel is manufactured, a Drive Integrated Circuit (DIC) is required to be connected to the periphery of the display panel, and the DIC can provide control signals, driving voltages, and the like for displaying images. The flexible circuit board can be connected to the display panel and the driving circuit board by a thermal compression bonding process, and in the thermal compression bonding process, the accuracy of a bonding position needs to be ensured so that the terminals of the driving circuit on the display panel and the terminals of the driving circuit board are correspondingly and electrically connected to the terminals on the flexible circuit board.
After the display panel is manufactured, the display panel is detected as an essential process, and the detection is mainly used for detecting whether the manufactured display panel has a micro fracture and breakage phenomenon. At present, whether the display panel is broken or not is mainly detected manually, the problem can be found only after the display panel is disassembled and carefully observed, time is consumed, efficiency is low, and some tiny cracks cannot be found through manual detection generally, so that product quality is influenced.
Disclosure of Invention
The embodiment of the invention aims to provide a detection device and a detection method for a display panel, so as to solve the problem that the efficiency of detecting whether the display panel is broken is low at present.
In a first aspect, an apparatus for detecting a display panel is provided, the apparatus comprising:
one end of the first connecting wire is connected with a first connecting end of a power line on the display panel, and the other end of the first connecting wire is connected with a first input end of the driving circuit board;
one end of the second connecting wire is connected with a second connecting end of the power wire on the display panel, and the other end of the second connecting wire is connected with a second input end of the driving circuit board;
the input end of the first detection line is respectively connected with the first connecting end and the second connecting end of the power line;
the input end of the second detection line is connected with the output end of the driving circuit board;
and two input ends of the detection module are respectively connected with output ends of the first detection line and the second detection line, and whether the display panel is broken or not is judged according to signals input by the first detection line and the second detection line.
In an embodiment, the first connection end and the second connection end of the power line form a communication loop with the first input end and the second input end corresponding to the driving circuit board through the first connection line and the second connection line.
In an embodiment, the first input terminal and the second input terminal of the driving circuit board are a PCD _ R pin and a PCD _ L pin of the driving circuit board, respectively.
In one embodiment, the input ends of the first detection line are two, one of the input ends of the first detection line is connected with the first connection end of the power line, and the other input end of the power line is connected with the second connection end of the power line.
In one embodiment, the apparatus further comprises:
and the power supply module is used for providing driving voltage for the driving circuit board so that the detection module judges whether the display panel is broken or not according to signals input by the first detection line and the second detection line.
In a second aspect, a method for detecting a display panel is provided, the method comprising:
providing a driving voltage to the driving circuit;
acquiring voltage signals input by a first detection line and a second detection line;
and judging whether the display panel is broken or not according to the voltage signal.
In one embodiment, before the acquiring the voltage signals input by the first detection line and the second detection line, the method further comprises:
and setting a first input end and a second input end of the driving circuit board, so that a first connecting end and a second connecting end of a power line form a communicating loop with the first input end and the second input end corresponding to the driving circuit board through the first connecting wire and the second connecting wire.
In an embodiment, the setting of the first input end and the second input end of the driving circuit board specifically includes:
and setting a first register corresponding to the first input end and the second input end in the driving circuit board to enable the first input end and the second input end to be in an effective state.
In an embodiment, the determining whether the display panel is broken according to the voltage signal includes:
when the voltage signal is zero, judging that the display panel is not broken;
and when the voltage signal is infinite, judging that the display panel is broken.
In an embodiment, the method further comprises:
setting a second register in the driving circuit board to enable the output end of the driving circuit board to be in an effective state;
the acquiring of the voltage signals input by the first detection line and the second detection line specifically includes:
acquiring a first voltage value of a power line acquired by the first detection line;
acquiring a second voltage value of the output end of the driving circuit board acquired by the second detection line;
and acquiring voltage signals input by a first detection line and a second detection line according to the first voltage value and the second voltage value.
In the embodiment of the invention, the first connecting end and the second connecting end of the power line can be correspondingly communicated with the first input end and the second input end of the driving circuit board through the first connecting line and the second connecting line, the voltage on the power line can be collected through the first detection line, and the voltage at the output end of the driving circuit can be collected through the second detection line, so that a voltage signal is formed, and the voltage signal can be used for detecting whether the display panel is broken or not; in the whole process, whether the display panel is broken can be detected only through a power line on the display panel, so that the problems of low efficiency and inaccurate detection of manual operation are avoided, and the detection efficiency and accuracy are effectively improved; meanwhile, because a detection lead does not need to be arranged on the display panel independently, the problems that the display panel is difficult to distinguish when being broken and the wiring space around the display panel is limited are avoided.
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 invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a detecting apparatus for a display panel according to an embodiment of the present invention;
FIG. 2 is a flow chart illustrating a method for inspecting a display panel according to an embodiment of the present invention;
FIG. 3 is a flow chart of a method for inspecting a display panel according to another embodiment of the present invention;
fig. 4 is a flowchart illustrating a method for detecting a display panel according to still another embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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.
Fig. 1 is a schematic structural diagram of a detection apparatus for a display panel according to an embodiment of the present invention, and as shown in fig. 1, the detection apparatus includes:
a first connection line 110, one end of the first connection line 110 being connected to a first connection terminal 161 of a power line 160 on the display panel 150, and the other end of the first connection line 110 being connected to a first input terminal 171 of the driving circuit board 170;
one end of the second connection line 120 is connected to the second connection end 162 of the power line 160 on the display panel 150, and the other end of the second connection line 120 is connected to the second input end 172 of the driving circuit board 170;
the input end of the first detection line 130 is respectively connected with the first connection end 161 and the second connection end 162 of the power line 160;
a second sensing line 140, an input end of the second sensing line 140 being connected to an output end 173 of the driving circuit board 170;
and two input ends of the detection module 180 are respectively connected to output ends of the first detection line 130 and the second detection line 140, and whether the display panel is broken is judged according to signals input by the first detection line 130 and the second detection line 140.
In the embodiment of the present invention, the first connection terminal 161 and the second connection terminal 162 of the power line 160 can be correspondingly communicated with the first input terminal 171 and the second input terminal 172 of the driving circuit board through the first connection line 110 and the second connection line 120, the voltage on the power line 160 can be collected through the first detection line 130, and the voltage at the output terminal of the driving circuit 170 can be collected through the second detection line 140, so as to form a voltage signal, which can be used for detecting whether the display panel is broken; in the whole process, whether the display panel is broken can be detected only by the power line 160 on the display panel, so that the problems of low efficiency and inaccurate detection of manual operation are avoided, and the detection efficiency and accuracy are effectively improved; meanwhile, because a detection lead does not need to be arranged on the display panel independently, the problems that the display panel is difficult to distinguish when being broken and the wiring space around the display panel is limited are avoided.
When the display panel is manufactured, according to the manufacturing process, a corresponding power line is disposed on the display panel, and the power line is generally disposed along an edge of the display panel, as shown in fig. 1. The power line can receive a voltage signal to drive the display panel to display, and can also receive a control signal to control the display of the display panel and the like. It should be emphasized that the power line is a necessary circuit in the manufacturing process of the display panel, and generally, when the display panel is intact, the power line is normally connected, and when the display panel is broken, the power line is correspondingly broken due to the manufacturing process, and based on this phenomenon, whether the display panel is broken can be detected according to whether the power line is broken.
The first connection end 161 and the second connection end 162 of the power line 160 form a communication loop with the first input end 171 and the second input end 172 of the corresponding driving circuit board 170 through the first connection line 110 and the second connection line 120. The communication loop can realize the detection of whether the display panel is broken or not. Specifically, when the power line 160 is normally connected and a driving voltage is provided to the driving circuit board 170, the driving circuit board 170 provides the driving voltage to the power line 160 through the first connection line 110 and the second connection line 120, and at this time, the voltage output by the output end 173 of the driving circuit board 170 is the driving voltage provided to the driving circuit board 170 (without considering voltage consumption on the connection loop), which is also the voltage output by the second detection line 140. Meanwhile, since the first detection line 130 is connected to the first connection terminal 161 and the second connection terminal 162 of the power line 160, the voltage output from the first detection line 130 is the same as the driving voltage, and at this time, the detection module 180 may detect that the voltages output from the first detection line 130 and the second detection line 140 are zero, which indicates that the power line 160 is normally connected and the display panel is not broken.
When the display panel is broken, it means that the power line 160 is broken, which means that the first connection terminal 161 and the second connection terminal 162 of the power line 160 cannot be correspondingly connected to the first input terminal 171 and the second input terminal 172 of the driving circuit board 170 through the first connection line 110 and the second connection line 120. At this time, after the driving voltage is supplied to the driving circuit board 170, the driving circuit board 170 cannot supply the driving voltage to the power line 160 through the first connection line 110 and the second connection line 120. At this time, the voltage output from the output terminal 173 of the driving circuit board 170 is the driving voltage supplied to the driving circuit board 170, which is also the voltage output from the second sensing line 140; however, the voltage output from the first detection line 130 is zero, and the voltages output from the first detection line 130 and the second detection line 140 detected by the detection module 180 are infinite, which indicates that the power line 160 is disconnected and the display panel is broken.
In this embodiment, the first input end 171 and the second input end 172 of the driving circuit board 170 are a PCD _ R pin and a PCD _ L pin of the driving circuit board 170, respectively. Accordingly, the driving circuit board 170 is generally provided with a register to control the working states of the two pins, and when detecting whether the display panel is broken, the register may be set, generally, the PCD _ EN value in the register is set, so that the two pins are in the working states, and thus the first connection end 161 and the second connection end 162 of the power line 160 form a communication loop with the first input end 171 and the second input end 172 of the corresponding driving circuit board 170 through the first connection line 110 and the second connection line 120.
As can be seen from fig. 1, the input ends of the first sensing wires 130 are two, one of the input ends of the first sensing wires 130 is connected to the first connection end 161 of the power line 160, and the other input end of the first sensing wire 130 is connected to the second connection end 162 of the power line 160.
In this embodiment, the detection apparatus further includes: and the power supply module is used for providing driving voltage for the driving circuit board so that the detection module judges whether the display panel is broken according to signals input by the first detection line and the second detection line.
It can be known that, the power supply module is electrically connected to the driving circuit board, and the connection mode can be selected, and detailed details are not described in this embodiment.
In combination with the above implementation process of this embodiment, when detecting whether the display panel is broken, only the driving voltage needs to be provided to the driving circuit board, and the driving voltage does not need to be provided to the power line.
Fig. 2 is a schematic flow chart illustrating a method for detecting a display panel according to an embodiment of the present invention, where the method includes:
step S120, providing a driving voltage to a driving circuit;
step S140, acquiring voltage signals input from the first detection line and the second detection line;
step S160, determining whether the display panel is broken according to the voltage signal.
In the embodiment of the invention, the first connecting end and the second connecting end of the power line can be correspondingly communicated with the first input end and the second input end of the driving circuit board through the first connecting line and the second connecting line, the voltage on the power line can be collected through the first detection line, and the voltage at the output end of the driving circuit can be collected through the second detection line, so that a voltage signal is formed, and the voltage signal can be used for detecting whether the display panel is broken or not; in the whole process, whether the display panel is broken can be detected only through a power line on the display panel, so that the problems of low efficiency and inaccurate detection of manual operation are avoided, and the detection efficiency and accuracy are effectively improved; meanwhile, because a detection lead does not need to be arranged on the display panel independently, the problems that the display panel is difficult to distinguish when being broken and the wiring space around the display panel is limited are avoided.
Fig. 3 is a schematic flow chart illustrating a detection method of a display panel according to another embodiment of the present invention, and as shown in fig. 3, before the step S140 acquires the voltage signals input through the first detection lines and the second detection lines, the method further includes:
step S130, a first input end and a second input end of the driving circuit board are set, so that the first connection end and the second connection end of the power line form a communication loop with the first input end and the second input end of the corresponding driving circuit board through the first connection line and the second connection line.
Wherein, set up drive circuit board's first input and second input, specifically do:
and setting a first register corresponding to the first input end and the second input end in the driving circuit board to enable the first input end and the second input end to be in an effective state.
The first register is correspondingly stored with a PCD _ EN value, and the first register is set, so that the first input end and the second input end can be in an effective state. As can be seen from the content of this embodiment, the first input end and the second input end are enabled, that is, the first connection end and the second connection end of the power line can be connected to the first input end and the second input end of the corresponding driving circuit board through the first connection line and the second connection line to form a communication loop.
In an implementation manner of this embodiment, when the step S160 determines whether the display panel is broken according to the voltage signal, when the voltage signal is zero, it indicates that the power line is normally connected, and the display panel is not broken; when the voltage signal is infinite, the power line is disconnected, and the display panel is broken. Therefore, the preset condition of the present embodiment may be a condition of the above specific determination, that is, a determination condition of whether the detection voltage signal is zero or infinite.
Fig. 4 is a schematic flow chart illustrating a method for detecting a display panel according to still another embodiment of the present invention, and as shown in fig. 4, the method further includes:
step S131, setting a second register in the driving circuit board to enable the output end of the driving circuit board to be in an effective state;
step S140 obtains voltage signals input by the first detection line and the second detection line, specifically:
acquiring a first voltage value of a power line acquired by a first detection line;
acquiring a second voltage value of the output end of the driving circuit board acquired by a second detection line;
the voltage signals input by the first detection line and the second detection line are acquired according to the first voltage value and the second voltage value.
In this embodiment, the setting of the PCD _ REV value in the second register may control the state of the output of the driving circuit. It can be known that, in this embodiment, the values in the first register and the second register need to be preset to detect whether the display panel is broken.
Specifically, the present embodiment is not limited to the specific order of step S130 and step S131. The first register and the second register may be set after a driving voltage is generally supplied to the driving circuit board. As another implementation manner of this embodiment, after the first register and the second register are set, the driving voltage may be provided to the driving circuit board. It will be appreciated that different implementations are within the achievable scope of the present embodiment.
It can be known that the voltage signal is a voltage difference between the positive and negative ends, the first voltage value collected by the first detection line is used as the positive voltage, and the second voltage value collected by the second detection line is used as the negative voltage, so that the voltage signal can be obtained. Of course, the specific positive and negative electrodes may be changed, and this embodiment will not be described in detail.
It should be noted that, the specific implementation of the above detection method content in this embodiment may be combined with the specific content in the above detection apparatus in this embodiment, and the implementation of the detection method in this embodiment depends on the corresponding work or processing of the corresponding module and line in the above detection apparatus.
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 apparatus 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 apparatus. 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 apparatus that comprises the element.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. An apparatus for inspecting a display panel, the apparatus comprising:
one end of the first connecting wire is connected with a first connecting end of a power line on the display panel, and the other end of the first connecting wire is connected with a first input end of the driving circuit board;
one end of the second connecting wire is connected with a second connecting end of the power wire on the display panel, and the other end of the second connecting wire is connected with a second input end of the driving circuit board;
the input end of the first detection line is respectively connected with the first connecting end and the second connecting end of the power line;
the input end of the second detection line is connected with the output end of the driving circuit board;
and two input ends of the detection module are respectively connected with output ends of the first detection line and the second detection line, and whether the display panel is broken or not is judged according to signals input by the first detection line and the second detection line.
2. The device of claim 1, wherein the first connection end and the second connection end of the power line form a communication loop with the first input end and the second input end of the corresponding driving circuit board through the first connection line and the second connection line.
3. The apparatus of claim 1 or 2, wherein the first and second inputs of the driver circuit board are PCD _ R and PCD _ L pins, respectively, of the driver circuit board.
4. The apparatus of claim 1, wherein the input terminals of the first sensing wire have two, one of the input terminals of the first sensing wire is connected to the first connection terminal of the power wire, and the other input terminal of the first sensing wire is connected to the second connection terminal of the power wire.
5. The apparatus of claim 1, further comprising:
and the power supply module is used for providing driving voltage for the driving circuit board so that the detection module judges whether the display panel is broken or not according to signals input by the first detection line and the second detection line.
6. A method for detecting a display panel, the method comprising:
providing a driving voltage to the driving circuit board;
acquiring voltage signals input by a first detection line and a second detection line;
judging whether the display panel is broken or not according to the voltage signal;
before the acquiring the voltage signals input by the first detection line and the second detection line, the method further comprises:
and setting a first input end and a second input end of the driving circuit board, so that a first connecting end and a second connecting end of a power line are connected with the first input end and the second input end corresponding to the driving circuit board through a first connecting wire and a second connecting wire.
7. The method of claim 6, wherein the first connection end and the second connection end of the power line form a communication loop with the first input end and the second input end of the corresponding driving circuit board through the first connection line and the second connection line.
8. The method according to claim 7, wherein the setting of the first input terminal and the second input terminal of the driving circuit board is specifically:
and setting a first register corresponding to the first input end and the second input end in the driving circuit board to enable the first input end and the second input end to be in an effective state.
9. The method according to claim 6, wherein the determining whether the display panel is broken according to the voltage signal comprises:
when the voltage signal is zero, judging that the display panel is not broken;
and when the voltage signal is infinite, judging that the display panel is broken.
10. The method of claim 6, further comprising:
setting a second register in the driving circuit board to enable the output end of the driving circuit board to be in an effective state;
the acquiring of the voltage signals input by the first detection line and the second detection line specifically includes:
acquiring a first voltage value of a power line acquired by the first detection line;
acquiring a second voltage value of the output end of the driving circuit board acquired by the second detection line;
and acquiring voltage signals input by a first detection line and a second detection line according to the first voltage value and the second voltage value.
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| CN201810054605.7A CN108305577B (en) | 2018-01-19 | 2018-01-19 | Detection device and detection method for display panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109597226B (en) * | 2018-12-25 | 2022-02-22 | 上海天马微电子有限公司 | Display panel and display device |
| CN110264926A (en) * | 2019-06-13 | 2019-09-20 | 武汉华星光电技术有限公司 | The detection circuit and its detection method of display panel |
| CN110718577B (en) * | 2019-10-23 | 2022-11-15 | 武汉天马微电子有限公司 | Display module and display device |
| CN110838273B (en) * | 2019-11-21 | 2022-06-10 | 武汉天马微电子有限公司 | Crack detection method for display panel |
| CN112863410A (en) * | 2021-01-11 | 2021-05-28 | 京东方科技集团股份有限公司 | Display substrate, crack detection method thereof and display device |
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