# US 8,786,539 B2 · Stereo-image displaying apparatus and method for reducing stereo-image cross-talk > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,786,539 B2 - Document ID: US8786539B2 - Status: Granted - Kind: B2 - Application number: 11/672,521 - Filed: 2007-02-08 - Published: 2008-02-21 - Granted: 2014-07-22 - Earliest claimed: 2006-08-16 - Assignees: Industrial Technology Research Institute - Applicants: Kuen Lee; Kuo-Chung Huang; Chao-Hsu Tsai - Inventors: Kuen Lee; Kuo-Chung Huang; Chao-Hsu Tsai - Web page: https://patentgrep.com/patent/US8786539B2 ## CPC - G09G 3/003: {to produce spatial visual effects} - G09G 3/3406: {Control of illumination source (illumination devices structurally associated with liquid crystal cells G02F1/1336)} - H04N 13/00: Stereoscopic video systems; Multi-view video systems; Details thereof - H04N 13/315: the parallax barriers being time-variant - H04N 13/341: using temporal multiplexing - H04N 13/398: Synchronisation thereof; Control thereof - 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 stereo-image displaying apparatus includes a light-source module and an image displaying device. The light-source module has at least one light-emitting block. A light-source driving unit is coupled with the light-source module and the image displaying device. The light-emitting block is driven by the light-source driving unit to synchronously emit a light according to a displaying frequency of the image displaying device with a reduced light-emitting duty cycle. The cross-talk between stereo images is reduced by using the light emitted from the light-source module, synchronously associating with the image displaying device. ## Claims ### Claim 1 A stereo-image displaying apparatus, comprising: a light-source module including at least one light-emitting block; a light-source driving unit, coupled with the light-source module, wherein the light emitting block is driven by the light-source driving unit to periodically emit a light according to a duty cycle; and a stereo-image displaying panel, changing an image at an image displaying frequency, wherein a stereo image composed from a left-eye image and right-eye image is lit and presented to the viewers' eyes by the light-source module which is synchronously controlled to emit light by the light-source driving unit. ### Claim 2 (depends on 1) The stereo-image displaying apparatus of claim 1, wherein the duty cycle has a predetermined minimum corresponding to the human eye capability. ### Claim 3 (depends on 1) The stereo-image displaying apparatus of claim 1, wherein the stereo image is displayed according to a time-multiplexed displaying mechanism. ### Claim 4 (depends on 1) The stereo-image displaying apparatus of claim 1, wherein the stereo image is displayed according to a time/spatial multiplexed displaying mechanism. ### Claim 5 (depends on 1) The stereo-image displaying apparatus of claim 1, wherein the light-source module is a backlight module. ### Claim 6 (depends on 1) The stereo-image displaying apparatus of claim 1, wherein the light-source module is formed from an active luminescence device. ### Claim 7 (depends on 6) The stereo-image displaying apparatus of claim 6, wherein the active luminescent device includes LED, FED or CCFL. ### Claim 8 (depends on 1) The stereo-image displaying apparatus of claim 1, wherein the stereo-image displaying panel is a non-self-illuminating spatial light modulator. ### Claim 9 (depends on 8) The stereo-image displaying apparatus of claim 8, wherein the spatial light modulator comprises a liquid displaying device, a liquid crystal on silicon display device or a holographic image displaying device. ### Claim 10 (depends on 1) The stereo-image displaying apparatus of claim 1, wherein the light emitted by the light-source module turns off before the stereo-image displaying panel changes the image in each time. ### Claim 11 A method of reducing stereo-image cross-talk, which is suitable for controlling a light-source module of a stereo-image displaying apparatus, comprising: according to an image displaying period, setting an illuminating duty cycle, and the illuminating duty cycle is less than the image displaying period; and utilizing a light-source driving unit for controlling the light-source module so as to illuminate according to the illuminating duty cycle, synchronizing to an image displaying frequency. ### Claim 12 (depends on 11) The method of reducing the stereo-image cross-talk of claim 11, wherein the light-source module is a backlight module. ### Claim 13 (depends on 11) The method of reducing the stereo-image cross-talk of claim 11, wherein the light-source module comprises at least a light emitting block driven by the light-source driving unit. ### Claim 14 (depends on 11) The method of reducing the stereo-image cross-talk of claim 11, wherein the stereo-image displaying apparatus utilizes a time multiplexed displaying mechanism to display the stereo-image. ### Claim 15 (depends on 11) The method of reducing the stereo-image cross-talk of claim 11, wherein the stereo-image displaying apparatus utilizes a time/spatial multiplexed displaying mechanism to display the stereo-image. ### Claim 16 (depends on 11) The method of reducing the stereo-image cross-talk of claim 11, wherein the light-source module is an active luminescence device. ### Claim 17 (depends on 16) The method of reducing the stereo-image cross-talk of claim 16, wherein the active luminescence device includes LED, FED or CCFL. ### Claim 18 (depends on 11) The method of reducing the stereo-image cross-talk of claim 11, wherein the stereo-image displaying apparatus is a non-self-illuminating optical device. ### Claim 19 (depends on 18) The method of reducing the stereo-image cross-talk of claim 18, wherein the non-self-illuminating optical device comprises a liquid displaying device, a liquid crystal on silicon display device or a holographic image displaying device. ### Claim 20 (depends on 11) The method of reducing stereo-image cross-talk of claim 11, wherein a light illuminated by the light-source module turns off before the stereo-image displaying apparatus changes a displaying image in each time.