# US 11,114,001 B2 · Image processing device, method of controlling image processing device, and display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,114,001 B2 - Document ID: US11114001B2 - Status: Granted - Kind: B2 - Application number: 16/601,618 - Filed: 2019-10-15 - Published: 2020-04-16 - Granted: 2021-09-07 - Earliest claimed: 2018-10-16 - Assignees: Seiko Espon Corporation - Applicants: Seiko Epson Corporation - Inventors: Manabu Saigo - Web page: https://patentgrep.com/patent/US11114001B2 ## CPC - G06T 3/20: Linear translation of whole images or parts thereof, e.g. panning - G09G 3/007: {Use of pixel shift techniques, e.g. by mechanical shift of the physical pixels or by optical shift of the perceived pixels} - G06T 3/40: Scaling of whole images or parts thereof, e.g. expanding or contracting - G06T 5/20: using local operators - G06T 5/73: Deblurring; Sharpening - G09G 3/001: {using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background (slide projectors per se G03B23/00 = 42 HP)} - G09G 5/006: {Details of the interface to the display terminal (specific for a display terminal using a CRT G09G1/167; using a flat panel G09G3/2096; circuits for interfacing with colour displays G09G5/04)} - G09G 2340/00: Aspects of display data processing - G09G 2340/0407: Resolution change, inclusive of the use of different resolutions for different screen areas - G09G 2340/0435: Change or adaptation of the frame rate of the video stream - G09G 2340/045: Zooming at least part of an image, i.e. enlarging it or shrinking it - G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL - 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 A projector configured to generate a first image and a second image to be displayed by a projection section, the projection section displaying first pixels constituting the first image and second pixels constituting the second image so that the second pixels are shifted with respect to corresponding ones of the first pixels, includes a filter processing circuit configured to execute a filter process of limiting a frequency band of an image signal of an input image with a one-dimensional filter to generate an intermediate image, an image expanding circuit configured to expand the intermediate image to generate a second expanded image, and an image dividing circuit configured to divide some of second expanded pixels constituting the second expanded image into the first image and the second image. ## Claims ### Claim 1 An image processing device configured to generate a first image and a second image so that first pixels constituting the first image and second pixels constituting the second image are displayed so as to be shifted from each other, the image processing device comprising: a filter processing circuit configured to execute a filter process of limiting a frequency band of an image signal of an input image with a one-dimensional filter to generate an intermediate image; an image expanding circuit configured to expand the intermediate image generated by the filter processing circuit to generate an expanded image; and an image dividing circuit configured to divide some of pixels constituting the expanded image generated by the image expanding circuit into the first image and the second image; wherein the one-dimensional filter includes a first filter configured as a low-pass filter and a second filter configured as a low-pass filter, pixels constituting the input image are arranged in a first direction and a second direction crossing the first direction, and the filter processing circuit comprises a filter processing circuit configured for limiting a frequency band in the first direction of the input image with the first filter, and for limiting a frequency band in the second direction of the input image with the second filter. ### Claim 2 (depends on 1) The image processing device according to claim 1, wherein the first filter and the second filter are configured so that a sum of a maximum frequency in the first direction of the intermediate image and a maximum frequency in the second direction becomes one of equal to and lower than a predetermined frequency. ### Claim 3 (depends on 1) The image processing device according to claim 1, wherein the image expanding circuit comprises an image expanding circuit configured for performing the expansion so that a sum of a number of pixels of the first image and a number of pixels of the second image becomes one of equal to and larger than a number of pixels constituting the input image. ### Claim 4 (depends on 1) The image processing device according to claim 1, wherein the image dividing circuit comprises an image dividing circuit configured for dividing pixels arranged in a zigzag manner out of the pixels constituting the expanded image into the first image and the second image. ### Claim 5 (depends on 1) The image processing device according to claim 1, wherein the pixels constituting the expanded image are arranged in a first direction and a second direction crossing the first direction, and in the expanded image, the second pixels represent pixels located at a distance of one pixel in the first direction with respect to the first pixels, and located at a distance of one pixel in the second direction with respect to the first pixels. ### Claim 6 A method of controlling an image processing device configured to generate a first image and a second image so that first pixels constituting the first image and second pixels constituting the second image are displayed so as to be shifted from each other, the method comprising: executing a filter process of limiting a frequency band of an image signal of an input image with a one-dimensional filter to generate an intermediate image; expanding the intermediate image to generate an expanded image; and dividing some of pixels constituting the expanded image into the first image and the second image; wherein the one-dimensional filter includes a first filter configured as a low-pass filter and a second filter configured as a low-pass filter, pixels constituting the input image are arranged in a first direction and a second direction crossing the first direction, and a frequency band in the first direction of the input image is limited by the first filter, and a frequency band in the second direction of the input image is limited b the second filter. ### Claim 7 (depends on 6) The method of controlling the image processing device according to claim 6, wherein the first filter and the second filter are configured so that a sum of a maximum frequency in the first direction of the intermediate image and a maximum frequency in the second direction becomes one of equal to and lower than a predetermined frequency. ### Claim 8 (depends on 6) The method of controlling the image processing device according to claim 6, wherein the expansion is performed so that a sum of a number of pixels of the first image and a number of pixels of the second image becomes one of equal to and larger than a number of pixels constituting the input image. ### Claim 9 (depends on 6) The method of controlling the image processing device according to claim 6, wherein pixels arranged in a zigzag manner out of the pixels constituting the expanded image are divided into the first image and the second image. ### Claim 10 (depends on 6) The method of controlling the image processing device according to claim 6, wherein the pixels constituting the expanded image are arranged in a first direction and a second direction crossing the first direction, and in the expanded image, the second pixels represent pixels located at a distance of one pixel in the first direction with respect to the first pixels, and located at a distance of one pixel in the second direction with respect to the first pixels. ### Claim 11 A display device comprising: a display section configured to display first pixels constituting a first image and second pixels constituting a second image so that the second pixels are shifted with respect to corresponding ones of the first pixels; and an image processing section configured to generate the first image and the second image, wherein the image processing section includes a filter processing circuit configured to execute a filter process of limiting a frequency band of an image signal of an input image with a one-dimensional filter to generate an intermediate image, an image expanding circuit configured to expand the intermediate image generated by the filter processing circuit to generate an expanded image, and an image dividing circuit configured to divide some of pixels constituting the expanded image generated by the image expanding circuit into the first image and the second image; wherein the one-dimensional filter includes a first filter configured as a low-pass filter and a second filter configured as a low pass filter, pixels constituting the input image are arranged in a first direction and a second direction crossing the first direction, and the filter processing circuit comprises a filter processing circuit configured for limiting a frequency band in the first direction of the input image with the first filter, and for limiting a frequency band in the second direction of the input image with the second filter. ### Claim 12 (depends on 11) The display device according to claim 11, wherein the first filter and the second filter are configured so that a sum of a maximum frequency in the first direction of the intermediate image and a maximum frequency in the second direction becomes one of equal to and lower than a predetermined frequency. ### Claim 13 (depends on 11) The display device according to claim 11, wherein the image expanding circuit comprises an image expanding circuit configured for performing the expansion so that a sum of a number of pixels of the first image and a number of pixels of the second image becomes one of equal to and larger than a number of pixels constituting the input image. ### Claim 14 (depends on 11) The display device according to claim 11, wherein the image dividing circuit comprises an image dividing circuit configured for dividing pixels arranged in a zigzag manner out of the pixels constituting the expanded image into the first image and the second image. ### Claim 15 (depends on 11) The display device according to claim 11, wherein the pixels constituting the expanded image are arranged in a first direction and a second direction crossing the first direction, and in the expanded image, the second pixels represent pixels located at a distance of one pixel in the first direction with respect to the first pixels, and located at a distance of one pixel in the second direction with respect to the first pixels.