CN106652863B - Detection circuit - Google Patents
Detection circuit Download PDFInfo
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- CN106652863B CN106652863B CN201710096246.7A CN201710096246A CN106652863B CN 106652863 B CN106652863 B CN 106652863B CN 201710096246 A CN201710096246 A CN 201710096246A CN 106652863 B CN106652863 B CN 106652863B
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- line group
- detection
- detection line
- alignment
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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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention provides a detection circuit, which comprises a first detection line group, a second detection line group and a third detection line group, wherein the first detection line group comprises a plurality of main detection lines and is connected with a display panel; a second detection line group including a plurality of sub detection lines, the second detection line group being disposed opposite to the first detection line group; the second detection line group is connected with the display panel; the alignment line group comprises a plurality of alignment lines, and the alignment line group is respectively connected with the first detection line group and the second detection line group; and the control module is used for disconnecting the first detection line group and the second detection line group when the display panel is detected. The detection circuit can improve the bad detection rate of the display panel, thereby improving the display effect.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of displays, in particular to a detection circuit.
[ background of the invention ]
The HVA alignment technology mainly utilizes the polymerization of macromolecules in liquid crystal under the combined action of ultraviolet light and an electric field to realize automatic alignment of the liquid crystal. The alignment process comprises the following steps: firstly, a certain proportion of high-purity reactive liquid crystal (phototaxis monomer, the liquid crystal has liquid crystal core of common liquid crystal molecules and can react with light energy base such as one or more acrylic base at the tail end) is doped into VA liquid crystal; then a voltage is applied between the upper substrate and the lower substrate to enable the liquid crystal molecules to generate a pre-tilt angle; after ultraviolet light in a specific wavelength range is irradiated from the array substrate side, the reactive liquid crystal is polymerized into a polymer network to attract the liquid crystal molecules on the surface layer to form a fixed pretilt angle. Therefore, the HVA alignment technique requires a certain voltage to be applied while the liquid crystal panel is irradiated with the ultraviolet light.
The array test is to input a test signal to the substrate through a test machine, and then introduce the test signal into the panel to test whether the panel has a bad phenomenon, such as whether the internal circuit of the panel is short-circuited or open-circuited.
The detection circuit in the prior design can carry out single-drive detection and double-drive detection on the display panel, namely, the double-side detection circuit of the panel can input test signals from two sides respectively, so that the poor omission factor can be reduced; however, the signal of the HVA curing can be input only in one side, and the load of the large-sized panel is generally large, which may cause large delay difference of the input signals on both sides of the panel, resulting in inconsistent curing effect and finally poor display of the panel.
Therefore, it is necessary to provide a detection circuit to solve the problems of the prior art.
[ summary of the invention ]
The invention provides a detection circuit capable of improving the defective detection rate of a panel.
To solve the above technical problem, the present invention provides a detection circuit, which includes:
the first detection line group comprises a plurality of main detection lines and is connected with the display panel;
a second detection line group including a plurality of sub detection lines, the second detection line group being disposed opposite to the first detection line group; the second detection line group is connected with the display panel;
the alignment line group comprises a plurality of alignment lines, and the alignment line group is respectively connected with the first detection line group and the second detection line group;
and the control module is used for disconnecting the first detection line group and the second detection line group when the display panel is detected.
In the detection circuit of the present invention, the first detection line group and the second detection line group are both used for inputting test signals to the display panel, and the test signals input by the first detection line group and the test signals input by the second detection line group are independent of each other.
In the detection circuit of the present invention, the control module is further configured to connect the first detection line group and the second detection line group through the alignment line group when the display panel is aligned.
In the detection circuit of the present invention, the first detection line group and the second detection line group are both used for inputting the alignment signal inputted by the alignment line group to the display panel, and the alignment signal inputted by the first detection line group is the same as the alignment signal inputted by the second detection line group.
In the detection circuit of the invention, the alignment line corresponds to one main detection line and one auxiliary detection line, and is connected with the corresponding main detection line and the corresponding auxiliary detection line;
the control module comprises a plurality of control units, and the control units correspond to the alignment lines one to one; the control unit is connected with a corresponding bridging alignment line, and the bridging alignment line is an alignment line connected between the main detection line and the auxiliary detection line.
In the detection circuit of the present invention, the control unit is configured to disconnect the bridging alignment line when detecting the display panel.
In the detection circuit of the invention, the control unit comprises a control end, an input end and an output end;
the control end is used for inputting control signals, the input end is connected with one end of the corresponding bridging alignment line, and the output end is connected with the other end of the corresponding bridging alignment line.
In the detection circuit of the present invention, the control unit includes a switching element.
In the detection circuit of the present invention, the first detection line group and the second detection line group are arranged in a first direction, and the alignment line group is arranged in a second direction.
In the detection circuit of the present invention, the first detection line group is used for detecting a first driving circuit, and the second detection line group is used for detecting a second driving circuit, wherein the first driving circuit and the second driving circuit are respectively located on opposite sides of the display panel.
The detection circuit of the invention adds the control module on the basis of the existing detection circuit, thereby realizing the bilateral solidification of the display panel and simultaneously realizing the unilateral or bilateral detection of the display panel; therefore, the bad detection rate of the display panel is improved, and the display effect is further improved.
[ description of the drawings ]
Fig. 1 is a schematic structural diagram of a detection circuit in a display panel according to the present invention.
Fig. 2 is another structural schematic diagram of the detection circuit in the display panel of the invention.
[ detailed description ] embodiments
The following description of the embodiments refers to the accompanying drawings for illustrating the specific embodiments in which the invention may be practiced. In the present invention, directional terms such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", etc. refer to directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention. In the drawings, elements having similar structures are denoted by the same reference numerals.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a detection circuit in a display panel according to the present invention.
As shown in fig. 1, the sensing circuit includes a first sensing line group 11, a second sensing line group 12, and an alignment line group 13, wherein the alignment line group 13 is connected to the first sensing line group 11 and the second sensing line group 12.
The first and second groups of detection lines 11 and 12 are used to detect the display panel 14, which includes two GOA circuits 15, and the group of alignment lines 13 is used to perform alignment processing on the display panel 14.
Since the alignment line group 13 is connected to the first and second detection line groups 11 and 12, the panels can be aligned bidirectionally from both the left and right sides during alignment.
The detection circuit can realize bilateral solidification of the display panel; the phenomenon of display unevenness does not occur. However, when the display panel is inspected, only the double-side inspection is performed, and the inspection omission of the horizontal defective line is likely to occur.
Referring to fig. 2, fig. 2 is another structural schematic diagram of the detection circuit in the display panel of the present invention.
As shown in fig. 2, the detecting circuit of the present invention includes a first detecting line group 11, a second detecting line group 12, an alignment line group 13, and a control module 20.
The first detection line group 11 is connected to the display panel 14; the first detection line group 11 includes a plurality of main detection lines L1 through L4. The first detection line group 11 is used for inputting external test signals to the display panel 14.
The second detection line group 12 is connected to the display panel 14; the second set of detection lines 12 includes a plurality of sub detection lines R1 through R4, and the second set of detection lines 12 is disposed opposite to the first set of detection lines 11. The second set of detection lines 12 is used to input external test signals to the display panel 14.
The set of alignment lines 13 includes a plurality of alignment lines H1-H4, and the set of alignment lines 13 is connected to the set of first detecting lines 11 and the set of second detecting lines 12 respectively; the alignment lines H1 to H4 are used for inputting external alignment signals. Each alignment line corresponds to one main detection line and one auxiliary detection line, and the alignment lines are connected with the corresponding main detection lines and the corresponding auxiliary detection lines.
For example, the alignment line H1 is connected to the main detection line L1 and the sub detection line R1. The alignment line H2 is connected to the main detection line L2 and the sub detection line R2. The alignment line H3 is connected to the main detection line L3 and the sub detection line R3. The alignment line H4 is connected to the main detection line L4 and the sub detection line R4.
In one embodiment, the first and second detecting line groups 11 and 12 are arranged along a first direction (i.e. vertical direction), and the alignment line group 13 is arranged along a second direction (i.e. horizontal direction).
The control module 20 is configured to disconnect the first detection line group 11 and the second detection line group 12, that is, disconnect the alignment line group 13 from the first detection line group 11 and the second detection line group 12 when detecting the display panel 14. The alignment lines between the first and second detection line groups 11 and 12 are disconnected, so that the test signal input from the first detection line group 11 and the test signal input from the second detection line group 12 are independent of each other.
That is, when one of the detection line groups inputs an external test signal, the external test signal is not transmitted to the second detection line group, so that the unilateral detection of the display panel can be realized. In addition, detection signals can be input to the two detection groups at the same time, so that bilateral detection of the display panel can be realized.
In an embodiment, when the display panel 14 is aligned, the control module 20 is further configured to connect the first set of detection lines 11 and the second set of detection lines 12, that is, maintain the connection between the set of alignment lines 13 and the first set of detection lines 11 and the second set of detection lines 12.
At this time, the first detecting line group 11 and the second detecting line group 12 are connected by the alignment lines, so that the alignment signals inputted by the alignment lines are simultaneously transmitted to the first detecting line group 11 and the second detecting line group 12, and then the first detecting line group 11 and the second detecting line group 12 input the alignment signals to the display panel 14. That is, the alignment signal inputted from the first detecting line group 11 is the same as the alignment signal inputted from the second detecting line group 12. Therefore, the panel can be subjected to bilateral alignment, and the phenomenon of uneven alignment is avoided.
The control module 20 includes a plurality of control units, which in one embodiment include switching elements. The switching element may be a transistor, a switch, or the like. Taking the switching element as an example, each control unit T1-T4 corresponds to one alignment line; that is, the alignment lines H1-H4 correspond to the control cells T1-T4, respectively.
Each control unit is connected with a corresponding bridging alignment line, and the bridging alignment line is an alignment line connected between the main detection line and the auxiliary detection line. For example, the control unit T1 is connected to the alignment line H1 connected between the main detection line L1 and the sub detection line R1, that is, the alignment line H1 connected between the main detection line L1 and the sub detection line R1 is a bridge alignment line.
Each triode comprises a control end, an input end and an output end; for example, transistor T1 includes a control terminal 22, an input terminal 23, and an output terminal 24, where control terminal 22 is used to input an external control signal, which may be provided by control unit 21. I.e. the control terminal of each transistor is connected to the output terminal of the control unit 21. The control unit 21 is usually an input terminal (pad) which inputs an external low-level signal or directly floats (does not give a signal) when performing the panel test. At the moment, each triode is closed, detection signals fed to two sides of the panel are not conducted with each other, single-side detection and double-side detection can be distinguished, the defective detection rate and the repair rate are improved, and the production cost of products is reduced. The input end 23 is connected to one end of the corresponding bridging alignment line, and the output end 24 is connected to the other end of the corresponding bridging alignment line.
Specifically, one end of the bridging alignment line on the left side is connected to the main detection line L1, the other end is connected to the input terminal 23, one end of the bridging alignment line on the right side is connected to the sub detection line R1, and the other end is connected to the output terminal 24. It will be appreciated that the remaining control units are connected in a similar manner.
When the display panel is subjected to alignment, the level of the control signal is high potential, so that each control unit is closed, namely, the alignment line is kept in a connection state with the corresponding main detection line and the corresponding auxiliary detection line, when the alignment line inputs the alignment signal, the first detection line group and the second detection line group can transmit the alignment signal to two sides of the display panel, namely, bilateral solidification is realized, and the phenomenon of unevenness is avoided.
When the display panel is detected, the level of the control signal is low potential. And disconnecting each control unit, namely, disconnecting the alignment lines from the corresponding main detection line and the corresponding auxiliary detection line, namely, disconnecting the bridging alignment lines. When the detection line group inputs the detection signals, the detection signals input at two sides of the display panel are not conducted with each other, so that single-side detection and double-side detection can be performed on the display panel, and the poor omission factor is reduced.
It is understood that, for the GOA circuit, a single-edge detection and a double-edge detection can be implemented, and the first driving circuit 151 and the second driving circuit 152 are respectively disposed on two sides of the display panel 14.
The first set of detecting lines 11 is used to detect the first driving circuit 151, and the second set of detecting lines 12 is used to detect the second driving circuit 152. It is understood that the driving circuit is a GOA circuit.
The detection circuit of the invention adds the control module on the basis of the existing detection circuit, thereby realizing the bilateral solidification of the display panel and simultaneously realizing the unilateral or bilateral detection of the display panel; therefore, the bad detection rate of the display panel is improved, and the display effect is further improved.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (8)
1. A detection circuit, comprising:
the first detection line group comprises a plurality of main detection lines and is connected with the display panel;
a second detection line group including a plurality of sub detection lines, the second detection line group being disposed opposite to the first detection line group; the second detection line group is connected with the display panel;
the alignment line group comprises a plurality of alignment lines, and the alignment line group is respectively connected with the first detection line group and the second detection line group;
the control module is used for disconnecting the first detection line group and the second detection line group when the display panel is detected, the first detection line group and the second detection line group are both used for inputting test signals to the display panel, and the test signals input by the first detection line group and the test signals input by the second detection line group are mutually independent;
the alignment lines correspond to the main detection line and the auxiliary detection line and are connected with the corresponding main detection line and the corresponding auxiliary detection line;
the control module comprises a plurality of control units, and the control units correspond to the alignment lines one to one; the control unit is connected with a corresponding bridging alignment line, and the bridging alignment line is an alignment line connected between the main detection line and the auxiliary detection line.
2. The detection circuit of claim 1, wherein the control module is further configured to enable the first detection line group and the second detection line group to be connected via the alignment line group when the display panel is aligned.
3. The detection circuit of claim 2,
the first detection line group and the second detection line group are used for inputting alignment signals input by the alignment line group into the display panel, and the alignment signals input by the first detection line group are the same as the alignment signals input by the second detection line group.
4. The detection circuit of claim 1,
the control unit is used for enabling the bridging alignment line to be disconnected when the display panel is detected.
5. The detection circuit of claim 4,
the control unit comprises a control end, an input end and an output end;
the control end is used for inputting control signals, the input end is connected with one end of the corresponding bridging alignment line, and the output end is connected with the other end of the corresponding bridging alignment line.
6. The detection circuit of claim 1, wherein the control unit comprises a switching element.
7. The detection circuit of claim 1,
the first detection line group and the second detection line group are arranged along a first direction, and the alignment line group is arranged along a second direction.
8. The detection circuit of claim 1,
the first detection line group is used for detecting a first driving circuit, and the second detection line group is used for detecting a second driving circuit, wherein the first driving circuit and the second driving circuit are respectively positioned at the opposite sides of the display panel.
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| CN201710096246.7A CN106652863B (en) | 2017-02-22 | 2017-02-22 | Detection circuit |
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| CN201710096246.7A CN106652863B (en) | 2017-02-22 | 2017-02-22 | Detection circuit |
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| CN106652863B true CN106652863B (en) | 2020-10-13 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108010475B (en) * | 2017-11-24 | 2021-06-22 | 苏州华星光电技术有限公司 | Display panel |
| CN108109566A (en) * | 2017-12-26 | 2018-06-01 | 深圳市华星光电技术有限公司 | A kind of detection circuit and display panel |
| CN108053788A (en) * | 2018-01-02 | 2018-05-18 | 京东方科技集团股份有限公司 | A kind of display panel, display device and test method |
| CN108766328B (en) * | 2018-05-17 | 2021-07-20 | 友达光电（苏州）有限公司 | Detection circuit and detection method |
| CN109637405B (en) * | 2018-12-05 | 2021-04-06 | 惠科股份有限公司 | Method and device for testing array substrate and storage medium |
| CN110060648A (en) * | 2019-05-17 | 2019-07-26 | 深圳市华星光电半导体显示技术有限公司 | Liquid crystal display and drive integrated circult |
| CN111354296B (en) * | 2020-04-16 | 2023-01-24 | 京东方科技集团股份有限公司 | Display panel and display device |
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Address after: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Patentee after: TCL Huaxing Photoelectric Technology Co.,Ltd. Address before: 9-2 Tangming Avenue, Guangming New District, Shenzhen City, Guangdong Province Patentee before: Shenzhen China Star Optoelectronics Technology Co.,Ltd. |
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