# US 7,505,025 B2 · Arrangement with a flat screen panel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,505,025 B2 - Document ID: US7505025B2 - Status: Granted - Kind: B2 - Application number: 11/015,552 - Filed: 2004-12-20 - Published: 2005-09-01 - Granted: 2009-03-17 - Earliest claimed: 2003-12-19 - Assignees: EIZO Corporation - Inventors: Ralf Edelbrock - Web page: https://patentgrep.com/patent/US7505025B2 ## CPC - G09G 3/2003: {Display of colours (specific for liquid crystal displays G09G3/3607)} - G02F 1/1336: {Illuminating devices} - G02F 2201/58: Arrangements comprising a monitoring photodetector - G09G 2320/043: Preventing or counteracting the effects of ageing - G09G 2320/0666: for control of colour parameters, e.g. colour temperature - G09G 2320/0693: Calibration of display systems - G09G 2360/148: the light being detected by light detection means within each pixel - 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) - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS ## Abstract An arrangement with a panel of a flat screen and a graphics processor, to which a digitized image signal can be applied. A lookup table evaluates the digitized image signal and transmits the digitized image signal to the panel via an interface, whereby the image information is visually displayed. Suitable means are used to reduce interfering influences on the image reproduction characteristic of the panel due to aging effects of the light transmitting parts of the panel, e.g., due to aging effects of the panel glass, the LCD fluid or the diffuser and/or polarization foils. The sensor is only visible above the display surface during a calibration phase. The image reproduction characteristic is adjusted automatically on site, e.g., while the flat screen is in use. No service personnel are required for this purpose. ## Claims ### Claim 1 An arrangement comprising: a panel of a flat screen, a graphics processor to which a digitized image signal is applied, a lookup table configured to evaluate the digitized image signal and transmit the signal to the panel via an interface, whereby image information from the signal is displayed on the panel of the flat screen, wherein, during a calibration phase, a test image is displayed on the panel of the flat screen and a luminance of the test image is measured by a sensor, and the sensor for measuring the luminance of the test image on the panel is arranged in a standby position in an area of the flat screen that is not visible to a viewer, further comprising a pivoting device carrying the sensor to attach the sensor to the flat screen and to pivot the sensor substantially parallel to the panel from the standby position into a position for measuring the luminance of the test image on the panel, and wherein the graphics processor adjusts the lookup table as a function of the measured luminance. ### Claim 2 (depends on 1) The arrangement as claimed in claim 1, wherein the pivoting device is configured to lower the sensor toward the panel during a pivoting process. ### Claim 3 (depends on 2) The arrangement as claimed in claim 2, further comprising a sealing device configured to shield the sensor from ambient light while the luminance is being measured. ### Claim 4 (depends on 3) The arrangement as claimed in claim 3, wherein the sensor and the pivoting device are arranged in a recess of a frame of the flat screen. ### Claim 5 (depends on 2) The arrangement as claimed in claim 2, further comprising a cleaning device configured to clean the sensor as it is being pivoted into the measurement position or back into the standby position. ### Claim 6 (depends on 2) The arrangement as claimed in claim 2, wherein the sensor and the pivoting device are arranged in a recess of a frame of the flat screen. ### Claim 7 (depends on 1) The arrangement as claimed in claim 1, further comprising a sealing device configured to shield the sensor from ambient light while the luminance is being measured. ### Claim 8 (depends on 7) The arrangement as claimed in claim 7, further comprising a cleaning device configured to clean the sensor as it is being pivoted into the measurement position or back into the standby position. ### Claim 9 (depends on 7) The arrangement as claimed in claim 7, wherein the sensor and the pivoting device are arranged in a recess of a frame of the flat screen. ### Claim 10 (depends on 1) The arrangement as claimed in claim 1, further comprising a cleaning device configured to clean the sensor as it is being pivoted into the measurement position or back into the standby position. ### Claim 11 (depends on 1) The arrangement as claimed in claim 1, wherein the sensor and the pivoting device are arranged in a recess of a frame of the flat screen.