# US 10,770,008 B2 · Display device with dimming panel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,770,008 B2 - Document ID: US10770008B2 - Status: Granted - Kind: B2 - Application number: 16/039,440 - Filed: 2018-07-19 - Published: 2019-01-31 - Granted: 2020-09-08 - Earliest claimed: 2017-07-31 - Assignees: Japan Display Inc. - Applicants: Japan Display Inc. - Inventors: Kazuhiko Sako; Daichi Suzuki; Naoyuki Takasaki; Tsutomu Harada; Kojiro Ikeda - Web page: https://patentgrep.com/patent/US10770008B2 ## CPC - G09G 3/3426: {the different display panel areas being distributed in two dimensions, e.g. matrix} - G09G 3/2007: {Display of intermediate tones} - G09G 3/3648: {using an active matrix (G09G3/367 - G09G3/3696 take precedence)} - G09G 2300/023: Display panel composed of stacked panels - G09G 2300/0426: Layout of electrodes and connections - 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 According to an aspect, a display device includes a display panel comprising a plurality of pixels, a light guide plate, a light source configured to emit light from a lateral side of the light guide plate, a dimming panel, and a controller. The dimming panel comprises a plurality of dimming areas arranged in an emission direction of the light from the light source. The dimming areas are capable of individually changing transmittance of the light according to intensities of light required to display an image using the display panel. When adjacent two of the dimming areas differ in light transmittance from each other, the controller increases output gradation values of target pixels, the target pixels being located in a predetermined area extending from a boundary between the two dimming areas in one of the two dimming areas that has lower light transmittance. ## Claims ### Claim 1 A display device comprising: a display panel comprising a plurality of pixels; a light guide plate provided on a back surface side of the display panel; a light source configured to emit light from a lateral side of the light guide plate; a dimming panel provided on a display panel side of the light guide plate; and a controller configured to control operations of at least the display panel and the dimming panel, wherein the dimming panel comprises a plurality of dimming areas arranged in an emission direction of the light from the light source, wherein the dimming areas are capable of individually changing transmittance of the light according to intensities of light required to display an image using the display panel, wherein, when adjacent two of the dimming areas differ in light transmittance from each other, the controller increases output gradation values of target pixels, the target pixels being located in a predetermined area extending from a boundary between the two dimming areas in one of the two dimming areas that has lower light transmittance, wherein the dimming areas are capable of changing the light transmittance to minimum transmittance, to maximum transmittance, or to any of one or more degrees of intermediate transmittance, the intermediate transmittance being transmittance between the minimum transmittance and the maximum transmittance, and wherein, when the light transmittance in one of the two adjacent dimming areas having lower light transmittance is the minimum transmittance, the controller causes the output gradation values of the target pixels to be higher than those in a case where the lower light transmittance is not the minimum transmittance. ### Claim 2 (depends on 1) The display device according to claim 1, wherein the controller is configured to set the output gradation values of the target pixels closer to the boundary between the two dimming areas to higher values. ### Claim 3 (depends on 1) The display device according to claim 1, wherein the light source emits the light from one end side of the light guide plate. ### Claim 4 (depends on 1) The display device according to claim 1, comprising a plurality of the light sources provided in positions opposed to one another with the light guide plate in between. ### Claim 5 (depends on 1) The display device according to claim 1, wherein the dimming areas extend in a direction intersecting the emission direction of the light from the light source to the light guide plate. ### Claim 6 (depends on 1) The display device according to claim 1, wherein the light guide plate comprises: a plurality of emission portions arranged in the emission direction of the light from the light source and in a direction intersecting the emission direction; and a plurality of guide portions configured to guide the light to the respective emission portions, wherein each of the guide portions is provided with one or more of the light sources, and wherein the dimming panel comprises the dimming areas arranged in the emission direction of the light from the light source and in the direction intersecting the emission direction. ### Claim 7 (depends on 1) The display device according to claim 1, wherein the gradation values of the respective target pixels continuously decrease as a distance between the boundary and the respective target pixels increases. ### Claim 8 A display device comprising: a display panel comprising a plurality of pixels; an illuminator comprising a plurality of light-emitting regions arranged in two intersecting directions; a dimming panel provided on a display panel side of the illuminator; and a controller configured to control operations of at least the display panel and the dimming panel, wherein the dimming panel comprises a plurality of dimming areas arranged in the two directions, wherein the dimming areas are capable of individually changing transmittance of light according to intensities of light required to display an image using the display panel, wherein, when adjacent two of the dimming areas differ in light transmittance from each other, the controller increases output gradation values of the target pixels, the target pixels being located in a predetermined area extending from a boundary between the two dimming areas in one of the two dimming areas that has lower light transmittance, such that the gradation values of the respective target pixels continuously decrease as a distance between the boundary and the respective target pixels increases, wherein the dimming areas are capable of changing the light transmittance to minimum transmittance, to maximum transmittance, or to any of one or more degrees of intermediate transmittance, the intermediate transmittance being transmittance between the minimum transmittance and the maximum transmittance, and wherein, when the light transmittance in one of the two adjacent dimming areas having lower light transmittance is the minimum transmittance, the controller causes the output gradation values of the target pixels to be higher than those in a case where the lower light transmittance is not the minimum transmittance.