# US 11,908,427 B2 · Display device and display method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,908,427 B2 - Document ID: US11908427B2 - Status: Granted - Kind: B2 - Application number: 18/089,809 - Filed: 2022-12-28 - Published: 2023-05-11 - Granted: 2024-02-20 - Earliest claimed: 2020-07-06 - Assignees: Panasonic Intellectual Property Management Co., Ltd. - Applicants: Panasonic Intellectual Property Management Co., Ltd. - Inventors: Hiroyuki Kado; Hiroshi Mitani - Web page: https://patentgrep.com/patent/US11908427B2 ## CPC - G09G 3/3607: {for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels (display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127)} - G02F 1/133: Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements (arrangements or circuits for control of liquid crystal elements in a matrix, not structurally associated with these elements G09G3/36) - G02F 1/1347: Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells - G09F 9/00: Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements (in which the variable information is permanently attached to a movable support G09F11/00; abacus G06C1/00; slide-rules G06G1/00) - G09F 9/46: in which the desired character is selected from a number of characters arranged one behind the other - G09G 3/3696: {Generation of voltages supplied to electrode drivers} - G09G 3/3413: {Details of control of colour illumination sources} - G09G 2300/0452: Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components - G09G 2310/0235: Field-sequential colour display - G09G 2320/0242: Compensation of deficiencies in the appearance of colours - G09G 2320/029: by monitoring one or more pixels in the display panel, e.g. by monitoring a fixed reference pixel - G09G 2320/064: by time modulation of the brightness of the illumination source - 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) - 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 - G09F: DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS ## Abstract This display device includes n number of liquid crystal displays, where n is an integer of 2 or more, light sources that can emit light of a plurality of different colors and that are provided to the respective liquid crystal displays, and a processor that causes the light sources to emit light of different colors so as to vary emission start timings for the respective light sources provided to the liquid crystal displays on the basis of input signals including color information regarding sub display images to be displayed on the respective liquid crystal displays. ## Claims ### Claim 1 A display device comprising: n number of liquid crystal displays, where n is an integer equal to or greater than 2; n number of light sources, each of the light sources being provided for a respective one of the liquid crystal displays and being capable of emitting light of a plurality of different colors; and a processor that causes the light sources to emit light of different colors based on, for each of the liquid crystal displays, an input signal including color information on a sub display image to be displayed on a corresponding one of the liquid crystal displays such that light emission start timings of the light sources provided for the liquid crystal displays are different from each other, wherein, for each adjacent pair of the liquid crystal displays, the processor causes a color of the light emitted from one of the light sources to be different from a color of the light emitted from another of the light sources when the one light source and the another light source are both emitting light, and causes the color of the light emitted from the one of the light sources starting at an emission start time of the one of the light sources to always be different from the color of the light emitted from the another of the light sources starting at a next emission start time of the another of the light sources after the emission start time of the one of the light sources. ### Claim 2 (depends on 1) The display device according to claim 1, wherein the processor generates, for each of the light sources, order information of a color of light to be emitted in each of a plurality of sub-frames obtained by dividing one frame of the sub display image according to a number of the plurality of colors of light that are able to be emitted by the light source corresponding to each of the liquid crystal displays, based on the input signal, and individually causes the light source to emit light based on the order information. ### Claim 3 (depends on 2) The display device according to claim 2, wherein in each of the plurality of sub-frames, the processor causes the light source provided in one of the liquid crystal displays other than a first liquid crystal display of the liquid crystal displays to emit light with a delay of a predetermined time from the light emission start timing of the light source provided in the first liquid crystal display, the first liquid crystal display being disposed at a foremost surface on a viewer side among the liquid crystal displays. ### Claim 4 (depends on 3) The display device according to claim 3, wherein the predetermined time is a time equal to or less than a display preparation time of the first liquid crystal display. ### Claim 5 (depends on 4) The display device according to claim 4, wherein the predetermined time is a time equal to or greater than a light emission time of the light source provided in the first liquid crystal display. ### Claim 6 (depends on 4) The display device according to claim 4, wherein the predetermined time is a time less than a light emission time of the light source provided in the first liquid crystal display. ### Claim 7 (depends on 3) The display device according to claim 3, wherein the light source corresponding to the first liquid crystal display is provided at a side surface side of the first liquid crystal display. ### Claim 8 (depends on 1) The display device according to claim 1, wherein a first liquid crystal display disposed at a foremost surface on a viewer side among the liquid crystal displays is a transparent display. ### Claim 9 (depends on 1) The display device according to claim 1, wherein the processor controls an applied voltage so that a voltage applied to one of the liquid crystal displays disposed at a rear surface side is larger than a voltage applied to another of the liquid crystal displays disposed at a front surface side. ### Claim 10 (depends on 1) The display device according to claim 1, wherein in a case that one of the liquid crystal displays disposed at a foremost surface on a viewer side among the liquid crystal displays is set as a first liquid crystal display, the light source corresponding to an n-th liquid crystal display disposed at a rearmost surface farthest from the first liquid crystal display is disposed at a rear surface side of the n-th liquid crystal display. ### Claim 11 A display method comprising: acquiring, for each of n number of liquid crystal displays, an input signal including color information on a sub display image to be individually displayed on a corresponding one of the liquid crystal displays, where n is an integer equal to or greater than 2; and causing n number of light sources, each of the light sources being provided for a respective one of the liquid crystal displays and being capable of emitting light of a plurality of different colors, to emit light of different colors based on the color information such that light emission start timings of the light sources provided for the liquid crystal displays are different from each other, wherein the causing comprises, for each adjacent pair of the liquid crystal displays, causing a color of the light emitted from one of the light sources to be different from a color of the light emitted from another of the light sources when the one light source and the another light source are both emitting light, and causing the color of the light emitted from the one of the light sources starting at an emission start time of the one of the light sources to always be different from the color of the light emitted from the another of the light sources starting at a next emission start time of the another of the light sources after the emission start time of the one of the light sources.