# US 8,786,197 B2 · Method and system for adjusting light output from a light source > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,786,197 B2 - Document ID: US8786197B2 - Status: Granted - Kind: B2 - Application number: 12/912,948 - Filed: 2010-10-27 - Published: 2012-05-03 - Granted: 2014-07-22 - Earliest claimed: 2010-10-27 - Assignees: TSMC Solid State Lighting Ltd. - Applicants: Hsin-Chieh Huang - Inventors: Hsin-Chieh Huang - Web page: https://patentgrep.com/patent/US8786197B2 ## CPC - H05B 45/12: using optical feedback - G01J 1/44: Electric circuits {(for command of an exposure part G03B7/02)} - H05B 41/36: Controlling - H05B 47/11: by determining the brightness or colour temperature of ambient light - Y02B 20/40: Control techniques providing energy savings, e.g. smart controller or presence detection - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - G01J: MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY (light sources F21, H01J, H01K, H05B; investigating properties of materials by optical means G01N) - Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS ## Abstract A system having a light guide adapted to collect light from a light source, a light detector attached to the light guide, a controller electrically connected to an output of the light detector, and a driver for driving the light source detachably connected to an output of the controller. The driver includes a memory that stores a calibration value for the light source. ## Claims ### Claim 1 A light adjusting system comprising: a light guide configured to collect light from a light source; a light detector coupled with the light guide; a controller electrically connected to an output of the light detector; and a driver for driving the light source, wherein the driver is coupled to an output of the controller, the driver comprising a memory that is configured to store a calibration value for the light source, the controller being configured to control the driver in response to the output of the light detector, wherein the controller is configured to update the calibration value that is stored in the memory while the controller is controlling the driver, and wherein the driver is configured to supply a correct power to the light source based on an updated stored calibration value when the controller is no longer controlling the driver. ### Claim 2 (depends on 1) The system of claim 1, wherein the light source is an LED. ### Claim 3 (depends on 1) The device of claim 1, wherein the driver is connected to the controller via a wired connection. ### Claim 4 (depends on 1) The system of claim 1, wherein the driver is connected to the controller via a wireless connection. ### Claim 5 (depends on 1) The system of claim 1, wherein the driver is connected to the controller via an optical connection. ### Claim 6 (depends on 5) The system of claim 5, wherein the optical connection is an optical fiber or a light pipe. ### Claim 7 (depends on 1) The system of claim 1, wherein the driver is configured to adjust an intensity of the light source. ### Claim 8 (depends on 1) The system of claim 1, wherein the light detector is at least one of a charge-coupled device or a complementary metal oxide semiconductor (CMOS) sensor. ### Claim 9 (depends on 1) The system of claim 1, wherein the light detector is at least one of a light intensity detector or a light color detector. ### Claim 10 A display system comprising: a display device comprising: at least one LED; and at least one driver for driving the LED, the driver comprising a memory configured to store a calibration value for the LED; a light guide configured to collect light from the at least one LED; a light detector attached to the light guide; and a controller electrically connected to an output of the light detector and connected to an input of the driver; wherein the controller is configured to update the calibration value in the memory while the controller is connected to the input of the driver, and wherein the driver is configured to supply a correct power to the display device based on an updated calibration value that is stored in the memory when the controller is no longer connected to the input of the driver. ### Claim 11 (depends on 10) The display system of claim 10, wherein the driver is connected to the controller via a wired connection. ### Claim 12 (depends on 10) The display system of claim 10, wherein the driver is connected to the controller via a wireless connection. ### Claim 13 (depends on 10) The display system of claim 10, wherein the controller is connected to the driver via an optical connection. ### Claim 14 (depends on 13) The display system of claim 13, wherein the optical connection is an optical fiber or a light pipe. ### Claim 15 (depends on 10) The display system of claim 10, wherein the light detector is at least one of a light intensity detector or a light color detector. ### Claim 16 A method comprising: measuring a light output at a display surface of a display device; comparing, via a controller, the measured light output to a predetermined threshold value; adjusting, via a driver being controlled by the controller, a light source in the display device so that the measured light output matches the predetermined threshold value; storing, in an electronic memory, a calibration value based on the adjusted light output, wherein the storing comprises updating the calibration value and storing an updated calibration value in the electronic memory; and driving, via the driver, the light source with the updated calibration value in response to the driver being disconnected from the controller. ### Claim 17 (depends on 16) The method of claim 16, wherein the predetermined threshold value is a preset value for the display device. ### Claim 18 (depends on 16) The method of claim 16, wherein the predetermined threshold value is based on a measured value of a light output at a predetermined portion of the display surface. ### Claim 19 (depends on 16) The method of claim 16, wherein the predetermined threshold value is based on a measured value of a light output at a display surface of a different display. ### Claim 20 (depends on 16) The method of claim 16, the method further comprises attaching a portable light-detecting portion for measuring the light output of the display surface before measuring the light output of the display surface and detaching the portable light-detecting portion after storing the calibration.