# US 10,310,668 B2 · Touch screen display system and a method for controlling a touch screen display system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,310,668 B2 - Document ID: US10310668B2 - Status: Granted - Kind: B2 - Application number: 14/997,588 - Filed: 2016-01-18 - Published: 2017-07-20 - Granted: 2019-06-04 - Earliest claimed: 2016-01-18 - Assignees: Coretronic Corporation - Applicants: Coretronic Corporation - Inventors: Yung-Chih Chen; Je-Fu Cheng - Web page: https://patentgrep.com/patent/US10310668B2 ## CPC - G06F 3/0418: {for error correction or compensation, e.g. based on parallax, calibration or alignment} - G06F 3/0425: {using a single imaging device like a video camera for tracking the absolute position of a single or a plurality of objects with respect to an imaged reference surface, e.g. video camera imaging a display or a projection screen, a table or a wall surface, on which a computer generated image is displayed or projected (tracking a projected light spot to determine a position on a display surface G06F3/0386)} - G06F 2203/04104: Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract A touch screen display system including at least two touch screen display apparatuses and a host apparatus is provided. The two touch screen display apparatuses respectively include a first touch screen and a second touch screen. One touch screen display apparatus senses the first touch screen in a first time period. Another touch screen display apparatus senses the second touch screen in a second time period. The host apparatus is electrically connected to the two touch screen display apparatuses. The host apparatus determines a touch location of a first touch object on the first touch screen or a touch location of a second touch object on the second touch screen. In addition, a method for controlling a touch screen display system is also provided. ## Claims ### Claim 1 A touch screen display system, comprising: at least two touch screen display apparatuses, respectively comprising a first touch screen and a second touch screen, wherein one of the at least two touch screen display apparatuses senses the first touch screen in a first time period, and another one of the at least two touch screen display apparatuses senses the second touch screen in a second time period; and a host apparatus, electrically connected to the at least two touch screen display apparatuses, and adapted to determine a touch location of a first touch object on the first touch screen or a touch location of a second touch object on the second touch screen, wherein the at least two touch screen display apparatuses comprise a first image capturing apparatus and a second image capturing apparatus, the first image capturing apparatus senses the first touch object on the first touch screen in the first time period, the second image apparatus senses the second touch object on the second touch screen in the second time period, wherein the host apparatus further controls the at least two touch screen display apparatuses to respectively display a plurality of test patterns on the first touch screen and the second touch screen for touch screen calibration in a manner of time division, wherein the test patterns comprise at least a first pair of test patterns having a gray scale compensation property, using at least two gray scales including white and black. ### Claim 2 (depends on 1) The touch screen display system according to claim 1, wherein the host apparatus controls the at least two touch screen display apparatuses to respectively display a main frame of an operating system and an extending frame of the operating system on the first touch screen and the second touch screen. ### Claim 3 (depends on 1) The touch screen display system according to claim 1, wherein a second pair of test patterns having a position compensation property. ### Claim 4 (depends on 3) The touch screen display system according to claim 3, wherein the first pair of test patterns comprises a first test pattern and a second test pattern, the first test pattern comprises a background of a first gray scale and a plurality of marks of a second gray scale, and the second test pattern comprises a background of the second gray scale and a plurality of marks of the first gray scale, wherein a summation value of the first gray scale and the second gray scale is a maximum gray value. ### Claim 5 (depends on 4) The touch screen display system according to claim 4, wherein locations of the marks of the second gray scale on the first test pattern are corresponding to locations of the marks of the first gray scale on the second test pattern. ### Claim 6 (depends on 3) The touch screen display system according to claim 3, wherein the second pair of test patterns comprises a third test pattern and a fourth test pattern, the third test pattern comprises a plurality of first marks, and the fourth test pattern comprises a plurality of second marks, wherein a combination of the first marks and the second marks are arranged in an array. ### Claim 7 (depends on 6) The touch screen display system according to claim 6, wherein the combination of the first marks and the second marks uniformly distributes in an area that a size is equal to a size of the third test pattern or the fourth test pattern. ### Claim 8 (depends on 3) The touch screen display system according to claim 3, wherein the test patterns further comprise a test pattern having no mark, the host apparatus controls the one of the at least two touch screen display apparatuses to sequentially display the test patterns on the first touch screen in a third time period, and controls the another one of the at least two touch screen display apparatuses to display the test pattern having no mark on the second touch screen in the third time period. ### Claim 9 (depends on 8) The touch screen display system according to claim 8, wherein the host apparatus controls the one of the at least two touch screen display apparatuses to display the test pattern having no mark on the first touch screen in a fourth time period, and controls the another one of the at least two touch screen display apparatuses to sequentially display the test patterns on the second touch screen in the fourth time period. ### Claim 10 (depends on 1) The touch screen display system according to claim 1, wherein the at least two touch screen display apparatuses are physically separated from the host apparatus. ### Claim 11 (depends on 1) The touch screen display system according to claim 1, wherein the first touch screen is physically separated from the first image capturing apparatus, the second touch screen is physically separated from the second image capturing apparatus. ### Claim 12 A method for controlling a touch screen display system, wherein the touch screen display system comprises at least two touch screen display apparatuses respectively comprising a first touch screen, a second touch screen, a first image capturing apparatus and a second image capturing apparatus, the method comprising: controlling the first image capturing apparatus to sense a first touch object on the first touch screen in a first time period; controlling the second image capturing apparatus to sense a second touch object on the second touch screen in a second time period; determining a touch location of the first touch object on the first touch screen or a touch location of the second touch object on the second touch screen; and controlling the at least two touch screen display apparatuses to respectively display a plurality of test patterns on the first touch screen and the second touch screen for touch screen calibration in a manner of time division, wherein the test pattern comprise at least a first pair of test patterns having a gray scale compensation property, using at least two gray scales including whtie and black. ### Claim 13 (depends on 12) The method for controlling the touch screen display system according to claim 12, further comprising: controlling the at least two touch screen display apparatuses to respectively display a main frame of an operating system and an extending frame of the operating system on the first touch screen and the second touch screen; and controlling the at least two touch screen display apparatuses to respectively display a plurality of test patterns on the first touch screen and the second touch screen for touch screen calibration in a manner of time division, wherein the test patterns comprise at least a first pair of test patterns having a gray scale compensation property, using at least two gray scales including white and black. ### Claim 14 (depends on 12) The method for controlling the touch screen display system according to claim 12, wherein a second pair of test patterns having a position compensation property. ### Claim 15 (depends on 14) The method for controlling the touch screen display system according to claim 14, wherein the first pair of test patterns comprises a first test pattern and a second test pattern, the first test pattern comprises a background of a first gray scale and a plurality of marks of a second gray scale, and the second test pattern comprises a background of the second gray scale and a plurality of marks of the first gray scale, wherein a summation value of the first gray scale and the second gray scale is a maximum gray value. ### Claim 16 (depends on 15) The method for controlling the touch screen display system according to claim 15, wherein locations of the marks of the second gray scale on the first test pattern are corresponding to locations of the marks of the first gray scale on the second test pattern. ### Claim 17 (depends on 14) The method for controlling the touch screen display system according to claim 14, wherein the second pair of test patterns comprises a third test pattern and a fourth test pattern, the third test pattern comprises a plurality of first marks, and the fourth test pattern comprises a plurality of second marks, wherein a combination of the first marks and the second marks are arranged in an array. ### Claim 18 (depends on 17) The method for controlling the touch screen display system according to claim 17, wherein the combination of the first marks and the second marks uniformly distributes in an area that a size is equal to a size of the third test pattern or the fourth test pattern. ### Claim 19 (depends on 14) The method for controlling the touch screen display system according to claim 14, wherein the test patterns further comprise a test pattern having no mark, and the step of controlling the at least two touch screen display apparatuses to respectively display the test patterns on the first touch screen and the second touch screen for touch screen calibration in the manner of time division comprises: controlling the one of the at least two touch screen display apparatuses to sequentially display the test patterns on the first touch screen in a third time period; and controlling the another one of the at least two touch screen display apparatuses to display the test pattern having no mark on the second touch screen in the third time period. ### Claim 20 (depends on 19) The method for controlling the touch screen display system according to claim 19, wherein the step of controlling the at least two touch screen display apparatuses to respectively display the test patterns on the first touch screen and the second touch screen for touch screen calibration in the manner of time division further comprises: controlling the one of the at least two touch screen display apparatuses to display the test pattern having no mark on the first touch screen in a fourth time period; and controlling the another one of the at least two touch screen display apparatuses to sequentially display the test patterns on the second touch screen in the fourth time period. ### Claim 21 (depends on 12) The method for controlling the touch screen display system according to claim 12, wherein the touch screen display system further comprises a host apparatus, and the at least two touch screen display apparatuses respectively comprise a first projection apparatus, and a second projection apparatus physically separated from the first projection apparatus, the host apparatus is configured so that a whole frame that is a combination of a main frame and an extending frame is to be displayed on the host apparatus, wherein the method further comprises: projecting the main frame on the first touch screen by the first projection apparatus; and projecting the extending frame on the second touch screen by the second projection apparatus.