# US 8,570,364 B2 · 3-dimensional image display apparatus and control method of the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,570,364 B2 - Document ID: US8570364B2 - Status: Granted - Kind: B2 - Application number: 13/646,174 - Filed: 2012-10-05 - Published: 2013-01-31 - Granted: 2013-10-29 - Earliest claimed: 2008-12-05 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Kyoung-oh Choi - Web page: https://patentgrep.com/patent/US8570364B2 ## CPC - H04N 13/359: Switching between monoscopic and stereoscopic modes - 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)} - G09G 3/3413: {Details of control of colour illumination sources} - H04N 13/183: On-screen display [OSD] information, e.g. subtitles or menus - H04N 13/30: Image reproducers (optical systems for producing stereoscopic or other three-dimensional [3D] effects G02B30/00) - H04N 13/337: using polarisation multiplexing - H04N 13/341: using temporal multiplexing - H04N 13/356: having separate monoscopic and stereoscopic modes - H04N 13/398: Synchronisation thereof; Control thereof - G09G 2320/062: Adjustment of illumination source parameters - G09G 2330/021: Power management, e.g. power saving - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - 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) ## Abstract Provided are a 3-dimensional image display apparatus and a control method thereof, the apparatus including: a video signal receiving unit which receives a video signal containing plane image data or stereoscopic image data from an external signal source; a liquid crystal module which includes a liquid crystal display panel to selectively display the plane image data and the stereoscopic image data, and a backlight unit provided in a rear portion of the liquid crystal display panel; a power supply which supplies power to the liquid crystal module; and a controller which determines whether the received video signal contains the plane image data or the stereoscopic image data, and if the video signal receiving unit contains the stereoscopic image data, the controller controls the power supply such that the backlight unit operates in a power saving mode while the stereoscopic image data is scanned to the liquid crystal display panel. ## Claims ### Claim 1 A display apparatus comprising: a video signal receiving unit to receive a video signal from an external signal source; a display module including a light source; a power supply unit operable to supply power to the light source in a first power mode and a second power mode; and a controller to determine whether the received video signal is to be displayed in a 3-dimensional mode or a 2-dimensional mode, and to control the power supply unit to supply electrical power to the light source in the first power mode if the received video signal is to be displayed in the 3-dimensional mode and to control the power supply unit to supply electrical power to the light source in the second power mode if the received video signal is to be displayed in the 2-dimensional mode, wherein an amount of electrical power consumed by the light source in the first power mode is different from an amount of electrical power consumed by the light source in the second power mode. ### Claim 2 (depends on 1) The display apparatus according to claim 1, wherein the amount of electrical power consumed by the light source in the first power mode is greater than the amount of electrical power consumed by the light source in the second power mode. ### Claim 3 A display apparatus comprising: a video signal receiving unit to receive a video signal from an external signal source; a light source; a power supply to supply power to the light source; and a controller to determine whether the received video signal includes stereoscopic image data or planar image data, to control the power supply based on the determination, and to control the light source to operate in a respective power mode during a scanning interval of the video signal based on the determination. ### Claim 4 (depends on 3) The display apparatus according to claim 3, wherein the controller determines whether the video signal includes the stereoscopic image data on the basis of a vertical blanking interval (VBI) of the video signal. ### Claim 5 (depends on 4) The display apparatus according to claim 4, wherein the controller determines that the video signal includes the stereoscopic image data if the vertical blanking interval (VBI) exceeds a predetermined value. ### Claim 6 (depends on 5) The display apparatus according to claim 5, wherein the predetermined value is one of a preset interval and a vertical blanking interval (VBI) of a previously received video signal different from a currently received video signal. ### Claim 7 (depends on 3) The display apparatus according to claim 3, further comprising: a user input unit to select one of a stereoscopic image mode and a planar image mode, wherein the controller determines that the received video signal includes the stereoscopic image data if the stereoscopic image mode is selected. ### Claim 8 (depends on 7) The display apparatus according to claim 7, wherein the user input unit comprises a hot key. ### Claim 9 (depends on 7) The display apparatus according to claim 7, further comprising: a memory to store on-screen display data related to the stereoscopic image mode and the planar image mode; and a generator to generate an on-screen display for selecting the mode. ### Claim 10 (depends on 3) The display apparatus according to claim 3, further comprising: an inverter to convert the power of the power supply into a drive power for driving the light source, wherein the controller controls the light source to operate in a power saving mode by controlling the power supplied to the inverter during the scanning interval. ### Claim 11 (depends on 3) The display apparatus according to claim 3, wherein the light source comprises a cold cathode fluorescent lamp, and the controller controls the power supply to turn off the cold cathode fluorescent lamp in a power saving mode during the scanning interval. ### Claim 12 (depends on 3) The display apparatus according to claim 3, wherein the light source comprises a light emitting diode, and the controller controls the power supply to decrease power supplied to the light emitting diode in a power saving mode during the scanning interval. ### Claim 13 A method of driving a display apparatus including a light source, the method comprising: receiving a video signal from an external signal source; determining whether the received video signal includes stereoscopic image data or planar image data; and operating the light source in a respective power mode during a scanning interval of the video signal based on the determination. ### Claim 14 (depends on 13) The method according to claim 13, further comprising: decreasing power supplied to the light source in a power saving mode. ### Claim 15 (depends on 13) The method according to claim 13, further comprising: turning off power supplied to the light source in a power saving mode. ### Claim 16 (depends on 13) The method according to claim 13, wherein the received video signal is determined to include the stereoscopic image data based on a comparison of a predetermined value and a vertical blanking interval of a currently received video signal. ### Claim 17 (depends on 16) The method according to claim 16, wherein the comparison determines that the received video signal includes the stereoscopic image data if the vertical blanking interval of the currently received video signal exceeds the predetermined value. ### Claim 18 (depends on 16) The method according to claim 16, wherein the predetermined value is one of a preset interval and a vertical blanking interval of a previously received video signal different from the currently received video signal. ### Claim 19 (depends on 16) The method according to claim 16, further comprising: operating the light source in a normal power mode during the vertical blanking interval of the currently received video signal if the received video signal includes the stereoscopic image data. ### Claim 20 (depends on 13) The method according to claim 13, wherein the video signal includes a vertical synchronous signal interval corresponding to one frame of the stereoscopic image data, the vertical synchronous signal interval being made up of the scanning interval of the video signal and a vertical blanking interval of the video signal, the method further comprising: operating the light source in a normal power mode only during the vertical blanking interval of the video signal if the received video signal includes the stereoscopic image data. ### Claim 21 A method of controlling a display apparatus including a light source, the method comprising: selecting one mode of a stereoscopic image mode of the display apparatus and a planar image mode of the display apparatus; controlling the light source to operate in a power saving mode during a scanning interval of the video signal and to operate in a normal power mode during a vertical blanking interval of the video signal, if the selected mode is the stereoscopic image mode; and controlling the light source to operate in the normal power mode, if the selected mode is the planar image mode.