# US 2019/0318694 A1 · Sensing circuit of source driver and display device using the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0318694 A1 - Document ID: US20190318694A1 - Status: Published application - Kind: A1 - Application number: 16/471,538 - Filed: 2017-12-12 - Published: 2019-10-17 - Earliest claimed: 2016-12-27 - Assignees: Silicon Works Co., Ltd. - Applicants: Silicon Works Co., Ltd. - Inventors: Yong Jung KWON; Min Young JEONG; Sang Min LEE; Jeung Hie CHOI - Web page: https://patentgrep.com/patent/US20190318694A1 ## CPC - G09G 3/3275: Details of drivers for data electrodes - G09G 3/3258: with pixel circuitry controlling the voltage across the light-emitting element - G09G 2300/0842: forming a memory circuit, e.g. a dynamic memory with one capacitor - G09G 2320/0295: by monitoring each display pixel - G09G 2360/16: Calculation or use of calculated indices related to luminance levels in display data - G09G 2370/08: Details of image data interface between the display device controller and the data line driver circuit - 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 Disclosed are a source driver and a display device using the same, and the display device includes the source driver that generates sensing data by performing a pre-processing operation on pixel data obtained by sensing display pixels, and a timing controller that generates correction data for correction for pixel characteristics by performing a post-processing operation on the sensing data. ## Claims ### Claim 1 A sensing circuit of a source driver, comprising: an operation circuit configured to, by performing an operation on pixel data obtained converted from sensing signals obtained by sensing pixels of a display panel, generate sensing data having a smaller number of bits than the pixel data; and a transmission unit configured to transmit the sensing data to a timing controller. ### Claim 2 (depends on 1) The sensing circuit of the source driver of claim 1, further comprising: a memory configured to store data to be processed in the operation of generating the sensing data by using the pixel data. ### Claim 3 (depends on 1) The sensing circuit of the source driver of claim 1, wherein the operation circuit generates the sensing data by an operation of obtaining at least one of an average value of the pixel data and a difference between the pixel data. ### Claim 4 (depends on 1) The sensing circuit of the source driver of claim 1, wherein the operation circuit generates the sensing data by performing an operation of selecting some of the pixel data. ### Claim 5 (depends on 4) The sensing circuit of the source driver of claim 4, wherein the operation circuit generates the sensing data by performing an operation of selecting an upper bit or a lower bit of the pixel data. ### Claim 6 (depends on 4) The sensing circuit of the source driver of claim 4, wherein the operation circuit generates the sensing data by performing an operation of selecting bits corresponding to a valid bit from bits of the pixel data. ### Claim 7 (depends on 1) The sensing circuit of the source driver of claim 1, wherein the operation circuit comprises: an operation unit that performs a first operation on the pixel data obtained by converting the sensing signals of the pixels of the display panel; and a bit selection unit that generates the sensing data by performing a second operation of selecting some of the pixel data subjected to the first operation. ### Claim 8 (depends on 1) The sensing circuit of the source driver of claim 1, wherein the operation circuit comprises: a bit selection unit that performs a first operation of selecting some of the pixel data obtained by converting the sensing signals of the pixels of the display panel; and an operation unit that generates the sensing data by performing a second operation on the pixel data subjected to the first operation. ### Claim 9 A sensing circuit of a source driver, comprising: a bit selection unit configured to receive a bit selection signal, and, by perform an operation of selecting some pixel data corresponding to the bit selection signal from pixel data obtained converted from sensing signals obtained by sensing pixels of a display panel, generate sensing data having a smaller number of bits than the pixel data; and a transmission unit configured to transmit the sensing data to a timing controller. ### Claim 10 (depends on 9) The sensing circuit of the source driver of claim 9, further comprising: a memory configured to store data to be processed in the operation of generating the sensing data by selecting some pixel data corresponding to the bit selection signal from the pixel data. ### Claim 11 (depends on 9) The sensing circuit of the source driver of claim 9, wherein the bit selection unit generates the sensing data by performing an operation of selecting an upper bit or a lower bit of the pixel data in correspondence to the bit selection signal. ### Claim 12 (depends on 9) The sensing circuit of the source driver of claim 9, wherein the bit selection unit generates the sensing data by performing an operation of selecting bits corresponding to a valid bit from bits of the pixel data in correspondence to the bit selection signal. ### Claim 13 (depends on 9) The sensing circuit of the source driver of claim 9, further comprising: an operation unit configured to perform a first operation on the pixel data obtained by converting the sensing signals of the pixels of the display panel, wherein the bit selection unit generates the sensing data by performing an operation of selecting some of the pixel data subjected to the first operation in correspondence to the bit selection signal. ### Claim 14 (depends on 9) The sensing circuit of the source driver of claim 9, further comprising: an operation unit configured to perform a second operation on the sensing data generated by the bit selection unit, wherein the transmission unit transmits the sensing data provided by the operation unit to the timing controller. ### Claim 15 A display device comprising: a source driver including a sensing circuit for performing a pre-processing operation on pixel data obtained by converting sensing signals of pixels of a display panel, and configured to generate sensing data having a smaller number of bits than the pixel data by the pre-processing operation of the sensing circuit and provide the sensing data; and a timing controller including a correction circuit for receiving the sensing data and performing a post-processing operation on the sensing data, and configured to generate correction data for correction for characteristics of a pixel by the post-processing operation of the correction circuit. ### Claim 16 (depends on 15) The display device of claim 15, wherein the sensing circuit comprises: an operation unit configured to generate the sensing data by performing the pre-processing operation of obtaining at least one of an average value of the pixel data and a difference between the pixel data. ### Claim 17 (depends on 15) The display device of claim 15, wherein the sensing circuit comprises: a bit selection unit configured to receive a bit selection signal, and generate the sensing data by performing the pre-processing operation of selecting some of the pixel data by the bit selection signal. ### Claim 18 (depends on 15) The display device of claim 15, wherein the sensing circuit performs the pre-processing operation by including an operation unit that performs a first operation on the pixel data obtained by converting the sensing signals of the pixels of the display panel and a bit selection unit that generates the sensing data by performing a second operation of selecting some of the pixel data subjected to the first operation. ### Claim 19 (depends on 15) The display device of claim 15, wherein the sensing circuit performs the pre-processing operation by including a bit selection unit that performs a first operation of selecting some of the pixel data obtained by converting the sensing signals of the pixels of the display panel and an operation unit that generates the sensing data by performing a second operation on the pixel data subjected to the first operation.