# US 10,311,827 B2 · Integrated circuit board and display apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,311,827 B2 - Document ID: US10311827B2 - Status: Granted - Kind: B2 - Application number: 14/761,753 - Filed: 2014-09-30 - Published: 2016-09-01 - Granted: 2019-06-04 - Earliest claimed: 2014-06-19 - Assignees: Boe Technology Group Co., Ltd.; K-Tronics (Su Zhou) Technology Co., Ltd. - Applicants: Boe Technology Group Co., Ltd.; K-Tronics (Su Zhou) Technology Co., Ltd. - Inventors: Shuhuan Yu; Xiao Zhang; Lijie Zhang; Xitong Ma; Peng Cheng - Web page: https://patentgrep.com/patent/US10311827B2 ## CPC - 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 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 3/2092: {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 2300/0426: Layout of electrodes and connections - G09G 2360/06: Use of more than one graphics processor to process data before displaying to one or more screens - G09G 2370/12: Use of DVI or HDMI protocol in interfaces along the display data pipeline - 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 There is provided an IC board and a display apparatus. Switching components (01; 02) are added between the internal interfaces (J1, J2 . . . Jn; j1, j2 . . . jn) corresponding to the backend data processing chips (U2; U3) and the frontend data processing chip (U1), or a switching component (02) is added between the internal interfaces (j1, j2 . . . jn) corresponding to the backend data processing chip (U2) and another backend data processing chip (U3). The switching components (01; 02) can ensure normal signal transmission between the backend data processing chips (U2; U3) and the frontend data processing chip (U1) or between the backend data processing chips (U2; U2) when no external test signal is input into the internal interfaces, i.e., when the IC board operates normally; and interrupt the signal transmission between the backend data processing chips (U2; U3) and the frontend data processing chip (U1) or between the backend data processing chips (U2; U3) when the internal interfaces j1, j2 . . . jn are input with an external test signal such that the impedance of the signal transmission path in the backend data processing chips (U2; U3) during the external testing remains consistent to avoid abnormal transmission of the external test signals and the signals during normal operation. ## Claims ### Claim 1 An integrated circuit board, comprising at least one frontend data processing chip, at least one backend data processing chip, at least one external connection interface connected to the at least one frontend data processing chip, and at least one internal interface connected to the at least one backend data processing chip, wherein the integrated circuit board further comprises at least one switching component, wherein the at least one internal interface, which is connected to a backend data processing chip, is further connected to at least one frontend data processing chip or to another backend data processing chip via the at least one switching component; in a case in which the backend data processing chip is in a normal operation, the backend data processing chip is configured to communicate with the at least one frontend data processing chip or with the another backend data processing chip via the internal interface to which the backend data processing chip is connected and the switching component; and in a case in which the backend data processing chip needs to be tested, the backend data processing chip to be tested is configured to receive a test signal from an external test circuit via the internal interface to which the backend data processing chip to be tested is connected, wherein the internal interface being plugged into the external test circuit to receive the test signal, and the switching component is configured to interrupt a communication connection between the backend data processing chip to be tested and the frontend data processing chip or that between the backend data processing chip to be tested and the another backend data processing chip; wherein the at least one external connection interface is a high definition multimedia interface HDMI, and the switching component is a transistor; a source of the transistor is configured to receive a signal subjected to the processing of the frontend data processing chip in a normal operation, a gate of the transistor is connected to a hot plug detect signal HTPDN pin of the HDMI, and a drain of the transistor is connected to the internal interfaces connected to the backend data processing chip to be tested. ### Claim 2 (depends on 1) The integrated circuit board of claim 1, wherein the number of the backend data processing chips is at least two, and all internal interfaces of each of the backend data processing chips are connected to at least one switching component. ### Claim 3 (depends on 1) The integrated circuit board of claim 1, wherein the switching component is a switching device. ### Claim 4 (depends on 1) The integrated circuit board of claim 1, wherein the switching component is a relay. ### Claim 5 (depends on 1) The integrated circuit board of claim 1, wherein the switching component is a metal oxide semiconductor field effect transistor. ### Claim 6 (depends on 5) The integrated circuit board of claim 5, wherein the switching component is a PMOS transistor. ### Claim 7 (depends on 1) The integrated circuit board of claim 1, wherein the integrated circuit board is a display driving circuit board. ### Claim 8 (depends on 1) A display apparatus comprising an integrated circuit board of claim 1. ### Claim 9 (depends on 8) The display apparatus of claim 8, wherein the number of the backend data processing chips is at least two, and all internal interfaces of each of the backend data processing chips are connected to at least one switching component. ### Claim 10 (depends on 8) The display apparatus of claim 8, wherein the switching component is a switching device. ### Claim 11 (depends on 8) The display apparatus of claim 8, wherein the switching component is a relay. ### Claim 12 (depends on 8) The display apparatus of claim 8, wherein the switching component is a metal oxide semiconductor field effect transistor. ### Claim 13 (depends on 12) The display apparatus of claim 12, wherein the switching component is a PMOS transistor. ### Claim 14 (depends on 8) The display apparatus of claim 8, wherein the integrated circuit board is a display driving circuit board.