# US 2014/0153082 A1 · Method and system for generating a display > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0153082 A1 - Document ID: US20140153082A1 - Status: Published application - Kind: A1 - Application number: 14/172,296 - Filed: 2014-02-04 - Published: 2014-06-05 - Earliest claimed: 2006-12-29 - Assignees: Texas Instruments Incorporated - Applicants: Texas Instruments Incorporated - Inventors: David W. Rekieta; Getzel Gonzalez - Web page: https://patentgrep.com/patent/US20140153082A1 ## CPC - G02F 1/31: Digital deflection, {i.e. optical switching}(G02F1/33 takes precedence) - G09G 3/002: {to project the image of a two-dimensional display, such as an array of light emitting or modulating elements or a CRT} - G09G 3/3413: {Details of control of colour illumination sources} - H04N 9/3111: {for displaying the colours sequentially, e.g. by using sequentially activated light sources (sequential projection in colour photography G03B33/08)} - H04N 9/3129: {scanning a light beam on the display screen (scanning a light beam on a screen in displays other than projection devices G09G3/02; scanning systems in general G02B26/10; projectors using laser light sources in general H04N9/3161)} - H04N 9/3155: {for controlling the light source (light source control per se H05B35/00 – H05B47/00; control of an illumination source for displays in general G09G3/3406)} - H04N 9/3161: {using laser light sources (using laser beams scanning the display screen H04N9/3129)} - G09G 3/346: {based on modulation of the reflection angle, e.g. micromirrors (micromirrors devices per se G02B26/0833)} - G09G 2310/0235: Field-sequential colour display - G09G 2320/0242: Compensation of deficiencies in the appearance of colours - G09G 2320/041: Temperature compensation - G09G 2320/064: by time modulation of the brightness of the illumination source - 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 - 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) - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract A method of displaying an image includes alternating an active state of each of a plurality of light sources. The light sources each generate a light beam when active. The alternating includes deactivating an active light source before an output of a light beam from the active light sources falls below a first predetermined threshold. The alternating further includes activating a deactivated light source only after an output of the inactive light source reaches a second predetermined threshold. The method further includes receiving each of the light beams at a spatial light modulator. ## Claims ### Claim 1 A method of displaying an image, comprising: alternating an active state of each of a plurality of light sources, the light sources each generating a light beam when active, the alternating comprising: deactivating an active light source before an output of a light beam from the active light source falls below a first predetermined threshold; and activating an inactive light source only after an output of the inactive light source reaches a second predetermined threshold; and receiving each of the light beams at a modulator, the modulator comprising an array of micro-mirror devices. ### Claim 2 (depends on 1) The method of claim 1, wherein the light sources comprise light emitting diodes. ### Claim 3 (depends on 2) The method of claim 2, wherein the light sources comprise red, blue, and green light emitting diodes. ### Claim 4 (depends on 1) The method of claim 1, wherein alternating an active state of each of a plurality of light sources further comprises activating only one light source of the plurality of light sources at a time. ### Claim 5 (depends on 1) The method of claim 1, wherein alternating an active state of each of a plurality of light sources further comprises alternating an active state of each of a plurality of light sources such that successive active states of a respective light source occur at a frequency greater than 360 Hz. ### Claim 6 (depends on 1) The method of claim 1, wherein alternating an active state of each of a plurality of light sources further comprises alternating an active state of each of a plurality of light sources such that successive active states of a respective light source occur at a frequency in a range selected from the group consisting of between: 361 Hz and 1,440 Hz, 1,440 Hz and 2,880 Hz, 2,880 Hz and 5,760 Hz, and 5,760 Hz and 12,000 Hz. ### Claim 7 A method of displaying an image, comprising: successively activating and deactivating respective ones of a plurality of light sources for illumination of a spatial light modulator during an image display time, each light source generating a respective different color light beam when activated, and the light beam of each light source having an output brightness that decreases with rising temperature as the light source heats up when activated, including: deactivating each activated light source before the decreasing output brightness of the associated light beam due to heating falls below a first predetermined brightness threshold; and reactivating each deactivated light source only when the light source has sufficiently cooled to enable the output brightness of the associated light beam to reach a second predetermined brightness threshold when that light source is reactivated. ### Claim 8 (depends on 7) The method of claim 7, wherein the light sources comprise light emitting diodes. ### Claim 9 (depends on 8) The method of claim 8, wherein the light sources comprise red, blue and green light emitting diodes. ### Claim 10 (depends on 9) The method of claim 9, further comprising modulating the respective light beams from the successively activated and deactivated light sources with the spatial light modulator, and projecting the modulated light beams to display the image. ### Claim 11 (depends on 10) The method of claim 10, wherein the spatial light modulator comprises a micro-mirror device. ### Claim 12 (depends on 11) The method of claim 11, wherein only one light source of the plurality of light sources is activated at a time. ### Claim 13 (depends on 12) The method of claim 12, wherein the light sources are activated such that successive active states of a respective light source occur at a frequency greater than 360 Hz. ### Claim 14 (depends on 13) The method of claim 13, wherein the frequency is in a range selected from the group consisting of between: 361 Hz and 1,440 Hz, 1,440 Hz and 2,880 Hz, 2,880 Hz and 5,760 Hz, and 5,760 Hz and 12,000 Hz. ### Claim 15 (depends on 7) The method of claim 7, further comprising modulating the respective light beams from the successively activated and deactivated light sources with the spatial light modulator, and projecting the modulated light beams to display the image. ### Claim 16 (depends on 7) The method of claim 7, wherein the spatial light modulator comprises a micro-mirror device. ### Claim 17 (depends on 7) The method of claim 7, wherein only one light source of the plurality of light sources is activated at a time. ### Claim 18 (depends on 7) The method of claim 7, wherein the light sources are activated such that successive active states of a respective light source occur at a frequency greater than 360 Hz. ### Claim 19 (depends on 18) The method of claim 18, wherein the frequency is in a range selected from the group consisting of between: 361 Hz and 1,440 Hz, 1,440 Hz and 2,880 Hz, 2,880 Hz and 5,760 Hz, and 5,760 Hz and 12,000 Hz.