# US 12,190,769 B2 · Display apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,190,769 B2 - Document ID: US12190769B2 - Status: Granted - Kind: B2 - Application number: 18/356,465 - Filed: 2023-07-21 - Published: 2024-02-01 - Granted: 2025-01-07 - Earliest claimed: 2022-07-29 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: YoungIn Jang; Subin Kim; KyungYun Kang - Web page: https://patentgrep.com/patent/US12190769B2 ## CPC - G09G 3/20: for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - 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 3/3266: Details of drivers for scan electrodes - G11C 19/28: using semiconductor elements (G11C19/14, G11C19/36 take precedence) - G09G 2300/0408: Integration of the drivers onto the display substrate - G09G 2300/0426: Layout of electrodes and connections - G09G 2310/0251: Precharge or discharge of pixel before applying new pixel voltage - G09G 2310/0267: Details of drivers for scan electrodes, other than drivers for liquid crystal, plasma or OLED displays - G09G 2310/0286: Details of a shift registers arranged for use in a driving circuit - G09G 2310/0291: Details of output amplifiers or buffers arranged for use in a driving circuit - G09G 2310/08: Details of timing specific for flat panels, other than clock recovery - G09G 2380/10: Automotive applications - 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) - G11C: STATIC STORES (semiconductor memory devices H10B) ## Abstract A display apparatus can include a display panel in which pixels, first to gth gate lines, and data lines are provided (where g is a natural number), and link lines provided on a rear surface of the display panel and connected to the data lines provided on a front surface of the display panel. In a display area including the pixels in the front surface, a first stage to an mth stage generating gate signals to be supplied to the first gate line to the gth gate line are provided (where m is a natural number less than or equal to g). A first monitoring line through which a first monitoring signal is output is further connected to the first stage, and the first monitoring line extends to the rear surface through a lateral surface of the display panel. ## Claims ### Claim 1 A display apparatus comprising: a display panel in which a plurality of pixels, first to gth gate lines, and a plurality of data lines are provided, g being a natural number; and a plurality of link lines provided on a rear surface of the display panel and connected to the plurality of data lines provided on a front surface of the display panel, wherein in a display area including the plurality of pixels in the front surface, a first stage to an mth stage generating a plurality of gate signals to be supplied to the first gate line to the gth gate line are provided, m being a natural number less than or equal to g, a first monitoring line through which a first monitoring signal is output is connected to the first stage, and the first monitoring line extends to the rear surface through a lateral surface of the display panel. ### Claim 2 (depends on 1) The display apparatus of claim 1, wherein a plurality of transistors included in the first stage is dispersed to be provided between a set of the plurality of pixels provided along at least one gate line connected to the first stage. ### Claim 3 (depends on 1) The display apparatus of claim 1, wherein each of the first gate line to the gth gate line extends from one end to the other end of the display panel in a first direction, the first monitoring line comprises a first line extending in a second direction different from the first direction, and the first line extends to the rear surface through the lateral surface. ### Claim 4 (depends on 3) The display apparatus of claim 3, wherein the first monitoring line further comprises a second line provided between the first stage and the first line, the second line is provided along the first direction, and a length of the second line is shorter than a length of each of the first gate line to the gth gate line. ### Claim 5 (depends on 1) The display apparatus of claim 1, wherein the first monitoring line is connected to a first monitoring pad provided on the rear surface. ### Claim 6 (depends on 1) The display apparatus of claim 1, wherein the first monitoring line extends in a direction different from a direction of the first gate line to the gth gate line. ### Claim 7 (depends on 1) The display apparatus of claim 1, wherein the first stage is provided at one end of the display area in a second direction different from a first direction in which the gate lines extend. ### Claim 8 (depends on 1) The display apparatus of claim 1, wherein the first stage is connected to the first gate line, and the mth stage is connected to the gth gate line. ### Claim 9 (depends on 8) The display apparatus of claim 8, wherein a second monitoring line through which a second monitoring signal is output is connected to the mth stage, and the second monitoring line extends to the rear surface through the lateral surface. ### Claim 10 (depends on 9) The display apparatus of claim 9, wherein the first stage is provided at one end of the display area in a second direction different from a first direction in which the gate lines extend, and the mth stage is provided at the other end of the display area in the second direction. ### Claim 11 (depends on 9) The display apparatus of claim 9, wherein another monitoring line through which another monitoring signal is output is connected to at least one of the second stage to m−1th stage, and the another monitoring line extends to the rear surface through the lateral surface. ### Claim 12 (depends on 1) The display apparatus of claim 1, wherein each of the first to mth stages comprises a buffer connected to at least one of the first to gth gate lines, the buffer comprises at least one pull-up transistor outputting a gate pulse and at least one pull-down transistor outputting a gate off signal, and the first stage further comprises a first monitoring buffer connected to the first monitoring line. ### Claim 13 (depends on 12) The display apparatus of claim 12, wherein the first monitoring buffer comprises a first monitoring pull-up transistor and a first monitoring pull-down transistor, a gate of the first monitoring pull-up transistor is connected to a gate of the at least one pull-up transistor, and a gate of the first monitoring pull-down transistor is connected to a gate of the at least one pull-down transistor. ### Claim 14 (depends on 13) The display apparatus of claim 13, wherein a first terminal of the first monitoring pull-up transistor is connected to a monitoring gate clock line to which a monitoring gate clock is supplied, a second terminal of the first monitoring pull-up transistor is connected to the first monitoring line, a first terminal of the first monitoring pull-down transistor is connected to a monitoring off voltage line to which a gate off voltage corresponding to the gate off signal is supplied, and a second terminal of the first monitoring pull-down transistor is connected to the first monitoring line. ### Claim 15 (depends on 12) The display apparatus of claim 12, wherein the buffers included in each of the first stage to the mth stage further comprise a carry transistor sharing a gate with the at least one pull-up transistor, and a pulse width of a carry clock supplied to the carry transistor included in the first stage is greater than a pulse width of a carry clock supplied to the carry transistor included in the second stage. ### Claim 16 (depends on 12) The display apparatus of claim 12, wherein the buffers included in each of the first stage to the mth stage further comprise a carry transistor sharing a gate with the at least one pull-up transistor, and a pulse width of a carry clock supplied to the carry transistor included in the first stage is the same as a pulse width of a carry clock supplied to the carry transistor included in the second stage. ### Claim 17 (depends on 15) The display apparatus of claim 15, wherein while the carry clock is supplied to the carry transistor included in the first stage, at least one gate clock is supplied to the at least one pull-up transistor and the monitoring gate clock is supplied to the first monitoring buffer. ### Claim 18 (depends on 15) The display apparatus of claim 15, wherein a carry capacitor is connected to one of two terminals of the carry transistor and a gate of the carry transistor. ### Claim 19 (depends on 16) The display apparatus of claim 16, wherein while the carry clock is supplied to the carry transistor included in the first stage, at least one gate clock is supplied to the at least one pull-up transistor and the monitoring gate clock is supplied to the first monitoring buffer. ### Claim 20 (depends on 16) The display apparatus of claim 16, wherein a carry capacitor is connected to one of two terminals of the carry transistor and a gate of the carry transistor.