# US 11,907,602 B2 · Cascaded display driver IC and multi-vision 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 11,907,602 B2 - Document ID: US11907602B2 - Status: Granted - Kind: B2 - Application number: 17/134,899 - Filed: 2020-12-28 - Published: 2021-11-25 - Granted: 2024-02-20 - Earliest claimed: 2020-05-21 - Assignees: MagnaChip Semiconductor, Ltd. - Applicants: Magnachip Semiconductor, Ltd. - Inventors: Jung Hoon Sul; Myung Woo Lee; Seung Ryeol Lee; Duk Min Lee - Web page: https://patentgrep.com/patent/US11907602B2 ## CPC - G06F 3/1446: {display composed of modules, e.g. video walls} - G06F 3/1431: {using a single graphics controller} - 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 5/006: {Details of the interface to the display terminal (specific for a display terminal using a CRT G09G1/167; using a flat panel G09G3/2096; circuits for interfacing with colour displays G09G5/04)} - G09G 5/12: Synchronisation between the display unit and other units, e.g. other display units, video-disc players - G09G 2300/026: Video wall, i.e. juxtaposition of a plurality of screens to create a display screen of bigger dimensions - G09G 2310/08: Details of timing specific for flat panels, other than clock recovery - G09G 2340/0435: Change or adaptation of the frame rate of the video stream - G09G 2360/04: Display device controller operating with a plurality of display units - G09G 2370/042: for monitor identification - G09G 2370/10: Use of a protocol of communication by packets in interfaces along the display data pipeline - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - 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 multi-vision display device includes a timing controller, a plurality of display panels, and a plurality of display driver integrated circuits (ICs). The timing controller is configured to receive source data and timing signals from a host, and generate a data packet comprising image data and control data. The plurality of display driver ICs each is connected to any one of the plurality of display panels. The control data includes a panel identifier indicating a number of display panels of the plurality of display panels connected to the display driver IC prior to a corresponding display panel connected to the display driver IC. Adjacent ones of the plurality of display driver ICs are connected to each other, modulate the panel identifier provided from one among the timing controller and a front end display driver IC, and provide the modulated panel identifier to a rear end display driver IC. ## Claims ### Claim 1 A multi-vision display device comprising: a timing controller configured to receive source data and timing signals from a host, and generate a data packet comprising image data and control data; a plurality of display panels; and a plurality of display driver integrated circuits (ICs) cascade-connected to each other and each connected to any one of the plurality of display panels, wherein each display driver IC comprises a driving unit configured to extract the image data corresponding to a panel identifier included in the control data and generate a data voltage driving a corresponding display panel, wherein the data packet is a set of single control data and multiple image data arranged in a serial format, wherein the image data included in the data packet is classified as PID0 to PIDn-1 according to the panel identifier when the multi-vision display device comprises n display driver ICs respectively connected to a corresponding display panel, wherein the image data classified as PID0 to PIDn-1 is sequentially provided to first to nth display driver ICs cascade-connected to each other, where n is an integer greater than 2, wherein each of the plurality of display driver ICs comprises: a decoder configured to decode the data packet comprising image data and control data; and a panel identifier modulator connected to the decoder and configured to: modulate the panel identifier included in the control data and provided from the decoder, and provide the modulated panel identifier to an encoder configured to generate an encoded data packet comprising image data and control data including the modulated panel identifier, and wherein the encoded data packet is provided from a front end display driver IC to a rear end display driver IC, such that the image data classified according to the modulated panel identifier is displayed on a display panel corresponding to the rear end display driver IC. ### Claim 2 (depends on 1) The multi-vision display device of claim 1, wherein each of the plurality of display driver ICs further comprises: a receiver configured to receive the data packet; the driving unit configured to use the image data corresponding to the panel identifier, generate the data voltage, and provide the data voltage to the corresponding display panel; and a transmitter configured to output the encoded data packet to a display driver IC connected to a rear end of the transmitter. ### Claim 3 (depends on 2) The multi-vision display device of claim 2, wherein the panel identifier modulator is configured to increase the panel identifier included in the control data provided from the front end display driver IC or the timing controller by 1 and generate the modulated panel identifier. ### Claim 4 (depends on 2) The multi-vision display device of claim 2, wherein the panel identifier modulator is configured to decrease the panel identifier included in the control data provided from the front end display driver IC or the timing controller by 1 and generate the modulated panel identifier. ### Claim 5 (depends on 2) The multi-vision display device of claim 2, wherein the data packet comprises a series of data packets of the image data to be displayed on the plurality of display panels during 1 horizontal cycle. ### Claim 6 (depends on 2) The multi-vision display device of claim 2, wherein each of the plurality of display driver ICs further comprises a delay unit configured to: generate a compensation time based on the panel identifier included in the received data packet, cause the driving unit to delay the data voltage, generated by using the image data corresponding to the panel identifier, by the compensation time, and provide the delayed data voltage to the display panel to synchronize image output timing between the plurality of display driver ICs cascade-connected to each other. ### Claim 7 (depends on 6) The multi-vision display device of claim 6, wherein the delay unit is configured to generate the compensation time based on a delay time per display driver IC, the panel identifier provided to each of the display driver ICs, and a number of connected display devices. ### Claim 8 (depends on 2) The multi-vision display device of claim 2, wherein the data packet encoded by the encoder comprises data equal to the image data generated by the timing controller. ### Claim 9 (depends on 2) The multi-vision display device of claim 2, wherein the rear end display driver IC is configured to extract the image data corresponding to the modulated panel identifier from the encoded data packet and provide it to the driving unit. ### Claim 10 (depends on 2) The multi-vision display device of claim 2, wherein the decoder is configured to decode a serial data packet received by the receiver and convert the serial data packet into a parallel data packet. ### Claim 11 A display driver IC comprising: a receiver configured to receive a data packet comprising image data and control data; a decoder configured to decode the received data packet; a driving unit configured to extract the image data corresponding to a panel identifier included in the control data, and generate a data voltage driving a display panel, wherein the data packet is a set of single control data and multiple image data arranged in a serial format, wherein the image data included in the data packet is classified as PID0 to PIDn-1 according to the panel identifier when a multi-vision display device comprises n display driver ICs respectively connected to a corresponding display panel, wherein the image data classified as PID0 to PIDn-1 is sequentially provided to first to nth display driver ICs cascade-connected to each other, where n is an integer greater than 2; a panel identifier modulator connected to the decoder and configured to: modulate the panel identifier included in the control data and provided from the decoder; and provide the modulated panel identifier to an encoder configured to generate an encoded data packet comprising image data and control data including the modulated panel identifier provided to a rear end display driver IC; and a transmitter configured to output the encoded data packet to the rear end display driver IC, and wherein the encoded data packet is provided from a front end display driver IC to the rear end display driver IC, such that the image data classified according to the modulated panel identifier is displayed on a display panel corresponding to the rear end display driver IC. ### Claim 12 (depends on 11) The display driver IC of claim 11, wherein the panel identifier modulator is configured to increase the panel identifier included in the control data provided from a timing controller or the front end display driver IC by 1 and generate the modulated panel identifier. ### Claim 13 (depends on 11) The display driver IC of claim 11, wherein the panel identifier modulator is configured to decrease the panel identifier included in the control data provided from a timing controller or the front end display driver IC by 1 and generate the modulated panel identifier. ### Claim 14 (depends on 11) The display driver IC of claim 11, further comprising a delay unit configured to: generate a compensation time based on the panel identifier included in the received data packet, cause the driving unit to delay the data voltage, generated by using the image data corresponding to the panel identifier, by the compensation time, and provide the delayed data voltage to the display panel to synchronize image output timing between a plurality of display driver ICs cascade-connected to each other. ### Claim 15 (depends on 14) The display driver IC of claim 14, wherein the delay unit is configured to generate the compensation time based on a delay time per display driver IC, the panel identifier provided to each display driver IC, and a number of connected display devices. ### Claim 16 (depends on 11) The display driver IC of claim 11, wherein the data packet encoded by the encoder comprises data equal to the image data included in the received data packet. ### Claim 17 (depends on 11) The display driver IC of claim 11, wherein the display driver IC connected to the rear end display driver IC is configured to extract the image data corresponding to the modulated panel identifier from the encoded data packet and provides it to the driving unit. ### Claim 18 (depends on 11) The display driver IC of claim 11, wherein the decoder is configured to decode a serial data packet received by the receiver and convert the serial data packet into a parallel data packet.