# US 2021/0343203 A1 · Display panel and display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0343203 A1 - Document ID: US20210343203A1 - Status: Published application - Kind: A1 - Application number: 16/623,717 - Filed: 2019-10-09 - Published: 2021-11-04 - Earliest claimed: 2019-06-25 - Assignees: Wuhan China Star Optoelectronics Technology Co., Ltd. - Applicants: Wuhan China Star Optoelectronics Technology Co., Ltd. - Inventors: Xiaohui Nie - Web page: https://patentgrep.com/patent/US20210343203A1 ## CPC - G09G 3/006: {Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays (testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309)} - G09G 3/2092: {Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto (suitable for both CRT and flat panel G09G5/003; specific for a CRT G09G1/165)} - G09G 2300/0426: Layout of electrodes and connections - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) ## Abstract The present invention discloses a display panel including a display area and a non-display area disposed around the display area, a test circuit of non-display area comprises a plurality of signal lines disposed in parallel along a first direction, a plurality of switch groups disposed in a same row along a second direction, a connecting signal line and a plurality of transmission line groups, the display area comprises a plurality of pixel groups disposed in parallel along the second direction, the second direction and the first direction are perpendicular to each other, each of switch groups comprises a first switch and a second switch disposed in the same row along the second direction. ## Claims ### Claim 1 A display panel, comprising a display area and a non-display area disposed around the display area; the non-display area comprising a test circuit, the test circuit comprising a plurality of signal lines disposed in parallel with each other along a first direction, the plurality of signal lines are used for transmitting a test signal; a plurality of switch groups disposed in a same row along a second direction, each of the plurality of switch groups is in sequence disposed a first switch and a second switch along the second direction, the first switch and the second switch are disposed parallel with each other and in the same row along the second direction, wherein the second direction and the first direction are perpendicular to each other; a plurality of transmission line groups disposed opposite to the corresponding plurality of switch groups, and the plurality of transmission line groups are connected the plurality of signal lines and the corresponding plurality of switch groups for transmitting the test signal by the plurality of signal lines to the corresponding plurality of switch groups; and the display area comprises a plurality of pixel groups disposed in parallel with each other along the second direction, each of the plurality of pixel groups is in sequence disposed a first pixel and a second pixel, the first pixel and the second pixel are disposed in parallel with each other along the second direction; the test signal is used for performing a test on the corresponding first pixel and the second pixel by the plurality of switch groups, or the test signal is used for performing a test on the corresponding first pixel or the second pixel by the plurality of switch groups. ### Claim 2 (depends on 1) The display panel as claimed in claim 1, wherein the plurality of signal lines comprise a first signal line used for transmitting a first test signal; a second signal line used for transmitting a second test signal; and a third signal line used for transmitting a third test signal; wherein, the first signal and the third signal are used for performing a performance test on the first pixel, the second signal and the third signal are used for performing a performance test on the second pixel. ### Claim 3 (depends on 2) The display panel as claimed in claim 2, wherein the first switch and the second switch both comprise an input terminal, an output terminal, and a control terminal between the input terminal and the output terminal, wherein the first switch and the second switch share the same input terminal; the input terminal of the first switch is used for transmitting the first test signal of the first signal line, the input terminal of the second switch is used for transmitting the second test signal of the second signal line; and the control terminal of the first switch is used for transmitting the third test signal of the third signal line, to control the conduction between the input terminal and the output terminal of the corresponding first switch, the control terminal of the second switch is used for transmitting the third test signal of the third signal line, to control the conduction between the input terminal and the output terminal of the corresponding second switch; when the input terminal and the output terminal of the first switch are conductive, the output terminal of the first switch is used for outputting the corresponding test signal to the corresponding first pixel, when the input terminal and the output terminal of the second switch are conductive, the output terminal of the second switch is used for outputting the corresponding test signal to the corresponding second pixel. ### Claim 4 (depends on 3) The display panel as claimed in claim 3, wherein the plurality of transmission line groups comprise a plurality of first transmission line groups and a plurality of second transmission line groups disposed alternately in parallel along the second direction, the plurality of first transmission line groups are oppositely disposed to the a switch groups in odd column, the plurality of second transmission line groups are oppositely disposed to the a switch groups in even column; the plurality of first transmission line groups comprises a first transmission line connected to the first signal line and the corresponding input terminal of the switch groups in the odd column for transmitting the first test signal of the first signal line to the switch groups in the odd column; a second transmission line connected to the third signal line and the two corresponding control terminals of the switch groups in the odd column, for transmitting the third test signal of the third signal line to the switch groups in the odd column; the plurality of second transmission line groups comprise a third transmission line connected to the second signal line and the corresponding input terminal of the switch groups in the even column for transmitting the second test signal of the second signal line to the switch groups in the even column; and a fourth transmission line connected to the third signal line and the two corresponding control terminals of the switch groups in the even column for transmitting the third test signal of the third signal line to the switch groups in the even column. ### Claim 5 (depends on 4) The display panel as claimed in claim 4, wherein two output terminals of the switch groups in the odd column are respectively connected to two first pixels adjacent to the second pixel of the corresponding pixel groups, used for performing a performance test on the corresponding two first pixels by using the first test signal and the third test signal; and two output terminals of the switch groups in the even column are respectively connected to two second pixels adjacent to the first pixel of the corresponding pixel groups, used for performing a performance test on the corresponding two second pixels by using the first test signal and the third test signal. ### Claim 6 (depends on 2) The display panel as claimed in claim 2, wherein the first switch and the second switch both comprise an input terminal, an output terminal, and a control terminal between the input terminal and the output terminal; the input terminal of the first switch used for transmitting the first test signal of the first signal line, and the input terminal of the second switch is used for transmitting the second test signal of the second signal line; and the control terminal of the first switch used for transmitting the third test signal of the third signal line, to control the conduction between the input terminal and the output terminal of the corresponding first switch, the control terminal of the second switch used for transmitting the third test signal of the third signal line, to control the conduction between the input terminal and the output terminal of the corresponding second switch; when the input terminal and the output terminal of the first switch are conductive, the output terminal of the first switch is used for outputting the corresponding test signal to the corresponding first pixel, when the input terminal and the output terminal of the second switch are conductive, the output terminal of the second switch is used for outputting the corresponding test signal to the corresponding second pixel. ### Claim 7 (depends on 6) The display panel as claimed in claim 6, wherein each of the plurality of transmission line groups comprises a fifth transmission line connected to a first signal line and a first input terminal of the first switch of the corresponding switch groups for transmitting the first test signal of the first signal line to the first switch of the corresponding switch groups; a sixth transmission line connected to a third signal line and a control terminal of the first switch of the corresponding switch groups for transmitting the third test signal of the third signal line to the first switch of the corresponding switch groups; a seventh transmission line connected to a second signal line and a second input terminal of the second switch of the corresponding switch groups for transmitting the second test signal of the second signal line to the second switch of the corresponding switch groups; and an eighth transmission line connected to a third signal line and a control terminal of the second switch of the corresponding switch groups for transmitting the third test signal of the third signal line to the second switch of the corresponding switch groups. ### Claim 8 (depends on 7) The display panel as claimed in claim 7, wherein the output terminal of the first switch of the switch groups is connected to the first pixel of the corresponding pixel groups and used for performing a performance test on the corresponding first pixel by the first test signal and the third test signal; and the output terminal of the second switch of the switch groups is connected to the second pixel of the corresponding pixel groups, used for performing a performance test on the corresponding second pixel by using the second test signal and the third test signal. ### Claim 9 (depends on 4) The display panel as claimed in claim 4, wherein composition materials of the control terminal, the second transmission line and the fourth transmission line are the same. ### Claim 10 (depends on 7) The display panel as claimed in claim 7, wherein composition materials of the control terminal, the sixth transmission line and the eighth transmission line are the same. ### Claim 11 A display device, wherein the display device comprises a display panel, wherein the display panel comprises a display area and a non-display area disposed around the display area; the non-display area comprises a test circuit, the test circuit comprises a plurality of signal lines disposed in parallel with each other along a first direction, the plurality of signal lines are used for transmitting a test signal; a plurality of switch groups disposed in a same row along a second direction, each of the plurality of switch groups is in sequence disposed a first switch and a second switch along the second direction, the first switch and the second switch are disposed parallel with each other and in the same row along the second direction, wherein the second direction and the first direction are perpendicular to each other; a plurality of transmission line groups disposed opposite to the corresponding plurality of switch groups, and the plurality of transmission line groups are connected the plurality of signal lines and the corresponding plurality of switch groups for transmitting the test signal by the plurality of signal lines to the corresponding plurality of switch groups; and the display area comprises a plurality of pixel groups disposed in parallel with each other along the second direction, each of the plurality of pixel groups is in sequence disposed a first pixel and a second pixel, the first pixel and the second pixel are disposed in parallel with each other along the second direction; the test signal is used for performing a test on the corresponding first pixel and the second pixel by the plurality of switch groups, or the test signal is used for performing a test on the corresponding first pixel or the second pixel by the plurality of switch groups. ### Claim 12 (depends on 11) The display device as claimed in claim 11, wherein the plurality of signal lines comprise a first signal line used for transmitting a first test signal; a second signal line used for transmitting a second test signal; and a third signal line used for transmitting a third test signal; wherein, the first signal and the third signal are used for performing a performance test on the first pixel, the second signal and the third signal are used for performing a performance test on the second pixel. ### Claim 13 (depends on 12) The display device as claimed in claim 12, wherein the first switch and the second switch both comprise an input terminal, an output terminal, and a control terminal between the input terminal and the output terminal, wherein the first switch and the second switch share the same input terminal; the input terminal of the first switch is used for transmitting the first test signal of the first signal line, the input terminal of the second switch is used for transmitting the second test signal of the second signal line; and the control terminal of the first switch is used for transmitting the third test signal of the third signal line, to control the conduction between the input terminal and the output terminal of the corresponding first switch, the control terminal of the second switch is used for transmitting the third test signal of the third signal line, to control the conduction between the input terminal and the output terminal of the corresponding second switch; when the input terminal and the output terminal of the first switch are conductive, the output terminal of the first switch is used for outputting the corresponding test signal to the corresponding first pixel, when the input terminal and the output terminal of the second switch are conductive, the output terminal of the second switch is used for outputting the corresponding test signal to the corresponding second pixel. ### Claim 14 (depends on 13) The display device as claimed in claim 13, wherein the plurality of transmission line groups comprise a plurality of first transmission line groups and a plurality of second transmission line groups disposed alternately in parallel along the second direction, the plurality of first transmission line groups are oppositely disposed to the a switch groups in odd column, the plurality of second transmission line groups are oppositely disposed to the a switch groups in even column; the plurality of first transmission line groups comprise a first transmission line connected to the first signal line and the corresponding input terminal of the switch groups in the odd column for transmitting the first test signal of the first signal line to the switch groups in the odd column; a second transmission line connected to the third signal line and the two corresponding control terminals of the switch groups in the odd column, for transmitting the third test signal of the third signal line to the switch groups in the odd column; the plurality of second transmission line groups comprise a third transmission line connected to the second signal line and the corresponding input terminal of the switch groups in the even column for transmitting the second test signal of the second signal line to the switch groups in the even column; and a fourth transmission line connected to the third signal line and the two corresponding control terminals of the switch groups in the even column for transmitting the third test signal of the third signal line to the switch groups in the even column. ### Claim 15 (depends on 14) The display device as claimed in claim 14, wherein two output terminals of the switch groups in the odd column are respectively connected to two first pixels adjacent to the second pixel of the corresponding pixel groups, used for performing a performance test on the corresponding two first pixels by using the first test signal and the third test signal; and two output terminals of the switch groups in the even column are respectively connected to two second pixels adjacent to the first pixel of the corresponding pixel groups, used for performing a performance test on the corresponding two second pixels by using the first test signal and the third test signal. ### Claim 16 (depends on 12) The display device as claimed in claim 12, wherein the first switch and the second switch both comprise an input terminal, an output terminal, and a control terminal between the input terminal and the output terminal; the input terminal of the first switch used for transmitting the first test signal of the first signal line, and the input terminal of the second switch is used for transmitting the second test signal of the second signal line; and the control terminal of the first switch used for transmitting the third test signal of the third signal line, to control the conduction between the input terminal and the output terminal of the corresponding first switch, the control terminal of the second switch used for transmitting the third test signal of the third signal line, to control the conduction between the input terminal and the output terminal of the corresponding second switch; when the input terminal and the output terminal of the first switch are conductive, the output terminal of the first switch is used for outputting the corresponding test signal to the corresponding first pixel, when the input terminal and the output terminal of the second switch are conductive, the output terminal of the second switch is used for outputting the corresponding test signal to the corresponding second pixel. ### Claim 17 (depends on 16) The display device as claimed in claim 16, wherein each of the plurality of transmission line groups comprises a fifth transmission line connected to a first signal line and a first input terminal of the first switch of the corresponding switch groups for transmitting the first test signal of the first signal line to the first switch of the corresponding switch groups; a sixth transmission line connected to a third signal line and a control terminal of the first switch of the corresponding switch groups for transmitting the third test signal of the third signal line to the first switch of the corresponding switch groups; a seventh transmission line connected to a second signal line and a second input terminal of the second switch of the corresponding switch groups for transmitting the second test signal of the second signal line to the second switch of the corresponding switch groups; and an eighth transmission line connected to a third signal line and a control terminal of the second switch of the corresponding switch groups for transmitting the third test signal of the third signal line to the second switch of the corresponding switch groups. ### Claim 18 (depends on 17) The display device as claimed in claim 17, wherein: the output terminal of the first switch of the switch groups is connected to the first pixel of the corresponding pixel groups and used for performing a performance test on the corresponding first pixel by the first test signal and the third test signal; and the output terminal of the second switch of the switch groups is connected to the second pixel of the corresponding pixel groups, used for performing a performance test on the corresponding second pixel by using the second test signal and the third test signal. ### Claim 19 (depends on 14) The display device as claimed in claim 14, wherein composition materials of the control terminal, the second transmission line and the fourth transmission line are the same. ### Claim 20 (depends on 17) The display device as claimed in claim 17, wherein composition materials of the control terminal, the sixth transmission line and the eighth transmission line are the same.