# US 9,520,081 B2 · Recording device and recording method 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 9,520,081 B2 - Document ID: US9520081B2 - Status: Granted - Kind: B2 - Application number: 14/535,661 - Filed: 2014-11-07 - Published: 2015-05-14 - Granted: 2016-12-13 - Earliest claimed: 2013-11-08 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Isamu Ryu - Web page: https://patentgrep.com/patent/US9520081B2 ## CPC - G09G 3/3216: using a passive matrix - G09G 3/3208: organic, e.g. using organic light-emitting diodes [OLED] - G09G 2320/046: Dealing with screen burn-in prevention or compensation of the effects thereof - G09G 2320/048: using evaluation of the usage time - G09G 2350/00: Solving problems of bandwidth in display systems - 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 A device is provided that includes a subtraction portion that outputs a difference value between a target totalizing value, obtained by accumulating a luminance value of a target pixel up to a current frame, and a reference totalizing value corresponding to a luminance value of a reference pixel, adjacent the target pixel, accumulated up to the current frame; a quantization portion that quantizes the difference value and outputs a quantization value; and a quantization error correction portion that corrects the quantization value at a correction frame selected based on a quantization step of the quantization value and a quantization error of the quantization value. ## Claims ### Claim 1 A device, comprising: a subtractor that outputs a difference value between a target totalizing value, obtained by summing a luminance value of a target pixel in a current frame and luminance values of the target pixel in previous frames, and a reference totalizing value, obtained by summing a luminance value of a reference pixel in the current frame and luminance values of the reference pixel in the previous frames, the reference pixel being adjacent the target pixel; a quantizer that quantizes the difference value and outputs a quantization value using a quantization method having a quantization step and a quantization error; and a quantization error corrector that corrects the quantization value at a correction frame based on the quantization step and the quantization error, wherein the quantization step is number of levels used in the quantization method. ### Claim 2 (depends on 1) The device as claimed in claim 1, wherein the reference pixel is a pixel, arranged at an i-th column, from among pixels of a display device arranged in a matrix, wherein i is a positive integer, and wherein the target pixel is a pixel, arranged at an i+1st column, from among the pixels of the display device. ### Claim 3 (depends on 2) The device as claimed in claim 2, wherein the reference pixel and the target pixel belong to the same row. ### Claim 4 (depends on 3) The device as claimed in claim 3, wherein the correction frame is selected every K frames, wherein K is a positive integer. ### Claim 5 (depends on 4) The device as claimed in claim 4, wherein the value of K is determined by dividing the quantization step by the quantization error. ### Claim 6 (depends on 4) The device as claimed in claim 4, wherein the quantization error corrector adds a predetermined value to the quantization value in every correction frame. ### Claim 7 (depends on 4) The device as claimed in claim 4, further comprising: a first delay that delays the reference totalizing value, wherein the subtractor receives the reference totalizing value from the first delay. ### Claim 8 (depends on 7) The device as claimed in claim 7, further comprising: a first multiplexer that receives the target totalizing value and the quantization value and outputs, as a current recorded value, the target totalizing value when the target pixel is a leading pixel and the quantization value when the target pixel is not the leading pixel, and wherein the leading pixel is a first pixel, belonging to each row, from among pixels of a display device arranged in a matrix. ### Claim 9 (depends on 8) The device as claimed in claim 8, further comprising: a memory that stores the current recorded value provided from the first multiplexer. ### Claim 10 (depends on 9) The device as claimed in claim 9, further comprising: a de-quantizer that receives a previous recorded value of the target pixel in a previous frame from the memory and de-quantizes the previous recorded value; a second delay that delays a previous recorded value of the reference pixel in the previous frame; a first adder that adds the previous recorded values of the reference pixel and the target pixel in the previous frame, and outputs an addition recorded value; and a second multiplexer that receives the previous recorded value of the target pixel and the addition recorded value, and outputs, as a previous totalizing value, the previous recorded value of the target pixel when the target pixel is the leading pixel and the addition recorded value of the target pixel when the target pixel is not the leading pixel. ### Claim 11 (depends on 10) The device as claimed in claim 10, further comprising: a second adder that adds a current luminance value of the target pixel and the previous totalizing value to output the target totalizing value. ### Claim 12 (depends on 1) The device as claimed in claim 1, wherein the quantizer performs non-linear quantization on the difference value. ### Claim 13 A method comprising: outputting a difference value between a target totalizing value, obtained by accumulating a luminance value of a target pixel in a current frame and luminance values of the target pixel in previous frames, and a reference totalizing value, obtained by summing a luminance value of a reference pixel in the current frame and luminance values of the reference pixel in the previous frames, the reference pixel being adjacent the target pixel; quantizing the difference value and outputs a quantization value using a quantization method having a quantization step and a quantization error; and correcting the quantization value at a correction frame that is selected based on the quantization step and the quantization error, wherein the quantization step is number of levels used in the quantization method.