# US 2026/0290220 A1 · Over driving circuit and display device including the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2026/0290220 A1 - Document ID: US20260290220A1 - Status: Published application - Kind: A1 - Application number: 19/570,574 - Filed: 2026-03-18 - Published: 2026-09-24 - Earliest claimed: 2025-03-21 - Assignees: Lx Semicon Co., Ltd. - Applicants: Lx Semicon Co., Ltd. - Inventors: Tae Hoon KIM; Do Seok KIM - Web page: https://patentgrep.com/patent/US20260290220A1 ## CPC - 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 2320/0242: Compensation of deficiencies in the appearance of colours - G09G 2340/02: Handling of images in compressed format, e.g. JPEG, MPEG - G09G 2340/06: Colour space transformation - G09G 2340/16: Determination of a pixel data signal depending on the signal applied in the previous frame - G09G 2360/16: Calculation or use of calculated indices related to luminance levels in display data - 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 An over driving circuit for a display device includes an encoder configured to generate first compressed data obtained by compressing RGB image data of a previous frame using a first compression algorithm, and to generate second compressed data obtained by compressing the RGB image data using a second compression algorithm; a reconstructor configured to select one of the first compressed data and the second compressed data and to synthesize the selected compressed data to generate one piece of integrated compressed data; a decoder configured to reconstruct the generated integrated compressed data to generate integrated reconstructed data; and a modulator configured to modulate image data of a current frame using the generated integrated reconstructed data. ## Claims ### Claim 1 An over driving circuit comprising: an encoder configured to generate first compressed data obtained by compressing RGB image data of a previous frame using a first compression algorithm, and to generate second compressed data obtained by compressing the RGB image data using a second compression algorithm; a reconstructor configured to select either the first compressed data or the second compressed data and to synthesize the selected compressed data to thereby generate one piece of integrated compressed data; a decoder configured to reconstruct the generated integrated compressed data to generate integrated reconstructed data; and a modulator configured to modulate image data of a current frame using the generated integrated reconstructed data. ### Claim 2 (depends on 1) The over driving circuit according to claim 1, wherein the encoder comprises: a first color space converter configured to convert the RGB image data of the previous frame into luminance data and chrominance data; a first compressor configured to generate the first compressed data obtained by compressing each of the converted luminance data and chrominance data using the first compression algorithm; and a second compressor configured to generate the second compressed data obtained by compressing each of the converted luminance data and chrominance data using the second compression algorithm. ### Claim 3 (depends on 2) The over driving circuit according to claim 2, wherein the first compressor is configured to generate the first compressed data by compressing each of the converted luminance data and chrominance data using the first compression algorithm and then multiplying a result of the compression by a predetermined quantization vector (Q). ### Claim 4 (depends on 2) The over driving circuit according to claim 2, wherein the reconstructor comprises: a first-first reconstructor configured to reconstruct the first compressed data using a first reconstruction algorithm to generate first-first reconstructed data; a first-second reconstructor configured to reconstruct the second compressed data using a second reconstruction algorithm to generate first-second reconstructed data; and a synthesizer configured to select reconstructed data having a smaller error from among the first-first reconstructed data and the first-second reconstructed data and to synthesize compressed data corresponding to the selected reconstructed data to thereby generate the integrated compressed data. ### Claim 5 (depends on 4) The over driving circuit according to claim 4, wherein the synthesizer is configured to calculate a first error sum obtained by summing per-pixel first errors between the first-first reconstructed data and the image data of the previous frame, and a second error sum obtained by summing per-pixel second errors between the first-second reconstructed data and the image data of the previous frame, and to select reconstructed data that has a smaller error sum using the first error sum and the second error sum. ### Claim 6 (depends on 5) The over driving circuit according to claim 5, wherein the synthesizer is configured not to select reconstructed data that has an error greater than a predetermined threshold error between the first error and the second error. ### Claim 7 (depends on 4) The over driving circuit according to claim 4, wherein the decoder comprises: a second-first reconstructor configured to reconstruct the generated integrated compressed data using a first reconstruction algorithm to generate second-first reconstructed data; a second-second reconstructor configured to reconstruct the generated integrated compressed data using a second reconstruction algorithm to generate second-second reconstructed data; a combiner configured to combine the generated second-first reconstructed data and the second-second reconstructed data to generate the integrated reconstructed data; and a second color space converter configured to convert the generated integrated reconstructed data into RGB reconstructed data. ### Claim 8 (depends on 4) The over driving circuit according to claim 4, wherein: the first compression algorithm is DCT (Discrete Cosine Transform) and the second compression algorithm is DXT (DirectX Texture), and the first reconstruction algorithm is IDCT (Inverse DCT) and the second reconstruction algorithm is IDXT (Inverse DXT). ### Claim 9 (depends on 1) The over driving circuit according to claim 1, further comprising a memory configured to store the generated integrated compressed data. ### Claim 10 A display device comprising: a display panel in which pixels are arranged in regions where a plurality of gate lines and a plurality of data lines intersect; a gate driver configured to output a gate signal through the gate lines; a data driver configured to output a data voltage through the data lines; and a timing controller configured to control the gate driver and the data driver, wherein the timing controller includes an over driving circuit, and wherein the over driving circuit comprises: an encoder configured to generate first compressed data obtained by compressing RGB image data of a previous frame using a first compression algorithm, and to generate second compressed data obtained by compressing the RGB image data using a second compression algorithm; a reconstructor configured to select either the first compressed data or the second compressed data and to synthesize the selected compressed data to thereby generate one piece of integrated compressed data; a decoder configured to reconstruct the generated integrated compressed data to generate integrated reconstructed data; and a modulator configured to modulate image data of a current frame using the generated integrated reconstructed data. ### Claim 11 (depends on 10) The display device according to claim 10, wherein the encoder comprises: a first color space converter configured to convert the RGB image data of the previous frame into luminance data and chrominance data; a first compressor configured to generate the first compressed data obtained by compressing each of the converted luminance data and chrominance data using the first compression algorithm; and a second compressor configured to generate the second compressed data obtained by compressing each of the converted luminance data and chrominance data using the second compression algorithm. ### Claim 12 (depends on 11) The display device according to claim 11, wherein the reconstructor comprises: a first-first reconstructor configured to reconstruct the first compressed data using a first reconstruction algorithm to generate first-first reconstructed data; a first-second reconstructor configured to reconstruct the second compressed data using a second reconstruction algorithm to generate first-second reconstructed data; and a synthesizer configured to select reconstructed data having a smaller error from among the first-first reconstructed data and the first-second reconstructed data and to synthesize compressed data corresponding to the selected reconstructed data to thereby generate the integrated compressed data. ### Claim 13 (depends on 12) The display device according to claim 12, wherein the synthesizer is configured to calculate a first error sum obtained by summing per-pixel first errors between the first-first reconstructed data and the image data of the previous frame, and a second error sum obtained by summing per-pixel second errors between the first-second reconstructed data and the image data of the previous frame, and to select reconstructed data that has a smaller error sum using the first error sum and the second error sum. ### Claim 14 (depends on 13) The display device according to claim 13, wherein the synthesizer is configured to not select reconstructed data that has an error greater than a predetermined threshold error among the first error and the second error. ### Claim 15 (depends on 12) The display device according to claim 12, wherein the decoder comprises: a second-first reconstructor configured to reconstruct the generated integrated compressed data using a first reconstruction algorithm to generate second-first reconstructed data; a second-second reconstructor configured to reconstruct the generated integrated compressed data using a second reconstruction algorithm to generate second-second reconstructed data; a combiner configured to combine the generated second-first reconstructed data and the second-second reconstructed data to generate the integrated reconstructed data; and a second color space converter configured to convert the generated integrated reconstructed data into RGB reconstructed data.