# US 2014/0198123 A1 · Image display apparatus and method for controlling the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0198123 A1 - Document ID: US20140198123A1 - Status: Published application - Kind: A1 - Application number: 14/238,343 - Filed: 2012-09-05 - Published: 2014-07-17 - Earliest claimed: 2011-09-05 - Assignees: Canon Kabushiki Kaisha - Inventors: Yoshikazu Shibamiya; Chika Masuda; Atsushi Morita; Joji Kamahara - Web page: https://patentgrep.com/patent/US20140198123A1 ## CPC - G09G 3/36: using liquid crystals - G09G 3/3426: {the different display panel areas being distributed in two dimensions, e.g. matrix} - G09G 2320/0646: Modulation of illumination source brightness and image signal correlated to each other - G09G 2320/103: Detection of image changes, e.g. determination of an index representative of the image change - G09G 2360/16: Calculation or use of calculated indices related to luminance levels in display data - 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 The present invention resides in an image display apparatus for displaying an image on the basis of image data; the image display apparatus comprising light emitting unit having a plurality of light sources for performing light emission that can be independently controlled respectively; setting unit which sets light emission control blocks for controlling one light source or the plurality of light sources with a common brightness; brightness determining unit which determines the light emission brightness of each of the light emission control blocks on the basis of the image data; and control unit which controls the light emission of the light emitting unit for each of the light emission control blocks in accordance with the light emission brightness determined by the determining unit; wherein the setting unit sets a size of the light emission control block of the light emitting unit depending on an amount of motion of the image. ## Claims ### Claim 1 An image display apparatus for displaying an image on the basis of image data, the image display apparatus comprising: light emitting unit which has a plurality of light sources for performing light emission that can be independently controlled respectively; setting unit which sets light emission control blocks for controlling one light source or the plurality of light sources with a common light emission brightness; brightness determining unit which determines the light emission brightness of each of the light emission control blocks on the basis of the image data; and control unit which controls the light emission of the light emitting unit for each of the light emission control blocks in accordance with the light emission brightness determined by the brightness determining unit, wherein: the setting unit sets a size of the light emission control block of the light emitting unit depending on an amount of motion of the image, and the setting unit sets the size of the light emission control block so that the brightness determining unit can determine the light emission brightness of the light source of each of all of the light emission control blocks within a predetermined period of time. ### Claim 2 (depends on 1) The image display apparatus according to claim 1, wherein the size of the light emission control block of the light emitting unit is decreased for the image in which a value of the amount of motion is not more than a predetermined threshold value, as compared with the image in which the value of the amount of motion is larger than the predetermined threshold value. ### Claim 3 (depends on 1) The image display apparatus according to claim 1, wherein the image includes a plurality of display areas, and the setting unit sets the size of the light emission control block of the light emitting unit corresponding to each of the display areas depending on the amount of motion of the image in each of the display areas of the image. ### Claim 4 (depends on 3) The image display apparatus according to claim 3, wherein the plurality of display areas include a first display area and a second display area, and the setting unit decreases the size of the light emission control block of the light emitting unit corresponding to the first display area as compared with the size of the light emission control block of the light emitting unit corresponding to the second display area, if a value of the amount of motion of the first display area is not more than a predetermined threshold value and a value of the amount of motion of the second display area is larger than the predetermined threshold value. ### Claim 5 (depends on 4) The image display apparatus according to claim 4, wherein the setting unit decreases the size of the light emission control block of the light emitting unit corresponding to the first display area in a stepwise manner as time elapses. ### Claim 6 (depends on 4) The image display apparatus according to claim 4, wherein the size of the light emission control block corresponding to the first display area is set to a predetermined size by the setting unit, the setting unit thereafter maintains the predetermined size of the light emission control block corresponding to the first display area as time elapses, and the setting unit decreases the size of the light emission control block corresponding to the second display area as time elapses. ### Claim 7 (depends on 3) The image display apparatus according to claim 3, further comprising area determining unit which determines whether or not the plurality of display areas, among which the amount of motion of the image mutually differs, are present in the image to be displayed on the image display apparatus, on the basis of attached information of the image data. ### Claim 8 (depends on 1) The image display apparatus according to claim 1, wherein the amount of motion of the image is a number of pixels in which pixel values of the image data are changed between two temporally adjoining frames of the image, or a sum total of magnitudes of motion vectors of the image data in relation to the two temporally adjoining frames. ### Claim 9 (canceled) ### Claim 10 A control method for controlling an image display apparatus comprising light emitting unit which has a plurality of light sources for performing light emission that can be independently controlled respectively, for displaying an image on the basis of image data, the control method comprising: a setting step of setting light emission control blocks for controlling one light source or the plurality of light sources with a common light emission brightness; a brightness determining step of determining the light emission brightness of each of the light emission control blocks on the basis of the image data; and a control step of controlling the light emission of the light emitting unit for each of the light emission control blocks in accordance with the light emission brightness determined by the brightness determining step, wherein: a size of the light emission control block of the light emitting unit is set depending on an amount of motion of the image in the setting step, and the size of the light emission control block is set in the setting step so that the light emission brightness of the light source can be determined for each of all of the light emission control blocks within a predetermined period of time in the brightness determining step. ### Claim 11 (depends on 10) The control method for controlling the image display apparatus according to claim 10, wherein the size of the light emission control block of the light emitting unit is decreased for the image in which a value of the amount of motion is not more than a predetermined threshold value, as compared with the image in which the value of the amount of motion is larger than the predetermined threshold value. ### Claim 12 (depends on 10) The control method for controlling the image display apparatus according to claim 10, wherein the image includes a plurality of display areas, and the size of the light emission control block of the light emitting unit corresponding to each of the display areas is set depending on the amount of motion of the image in each of the display areas of the image in the setting step. ### Claim 13 (depends on 12) The control method for controlling the image display apparatus according to claim 12, wherein the plurality of display areas include a first display area and a second display area, and the size of the light emission control block of the light emitting unit corresponding to the first display area is decreased as compared with the size of the light emission control block of the light emitting unit corresponding to the second display area, if a value of the amount of motion of the first display area is not more than a predetermined threshold value and a value of the amount of motion of the second display area is larger than the predetermined threshold value, in the setting step. ### Claim 14 (depends on 13) The control method for controlling the image display apparatus according to claim 13, wherein the size of the light emission control block of the light emitting unit corresponding to the first display area is decreased in a stepwise manner as time elapses, in the setting step. ### Claim 15 (depends on 13) The control method for controlling the image display apparatus according to claim 13, wherein the size of the light emission control block corresponding to the first display area is set to a predetermined size by the setting step, the predetermined size of the light emission control block corresponding to the first display area is thereafter maintained as time elapses, in the setting step, and the size of the light emission control block corresponding to the second display area is decreased as time elapses, in the setting step. ### Claim 16 (depends on 12) The control method for controlling the image display apparatus according to claim 12, further comprising an area determining step of determining whether or not the plurality of display areas, among which the amount of motion mutually differs, are present in the image to be displayed on the image display apparatus, on the basis of attached information of the image data. ### Claim 17 (depends on 10) The control method for controlling the image display apparatus according to claim 10, wherein the amount of motion of the image is a number of pixels in which pixel values of the image data are changed between two temporally adjoining frames of the image, or a sum total of magnitudes of motion vectors of the image data in relation to the two temporally adjoining frames. ### Claim 18 (canceled)