# US 11,027,599 B2 · Systems, apparatus, and methods to adjust dimming associated with dual panel sunroofs > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,027,599 B2 - Document ID: US11027599B2 - Status: Granted - Kind: B2 - Application number: 16/359,137 - Filed: 2019-03-20 - Published: 2020-09-24 - Granted: 2021-06-08 - Earliest claimed: 2019-03-20 - Assignees: Aisin Technical Center of America, Inc. - Applicants: Aisin Technical Center of America, Inc. - Inventors: Shintaro Katsura - Web page: https://patentgrep.com/patent/US11027599B2 ## CPC - B60J 3/04: adjustable in transparency - B60J 7/0007: {moveable head-liners, screens, curtains or blinds for ceilings} - B60J 7/043: Sunroofs (B60J7/047 - B60J7/053 take precedence){e.g. sliding above the roof} - E06B 2009/2464: {featuring transparency control by applying voltage, e.g. LCD, electrochromic panels} - B60J: WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES (fastening, suspending, closing, or opening of such devices E05) - E06B: FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES (shades or blinds for greenhouses A01G9/22; curtains A47H; lids for car boots or bonnets B62D25/10; skylights E04B7/18; sunshades, awnings E04F10/00) ## Abstract Systems, apparatus, and methods to adjust dimming associated with dual panel sunroof are disclosed. A disclosed sunroof dimming system for a vehicle includes a first dimmable panel of a sunroof and a second dimmable panel of the sunroof. The first dimmable panel is moveable relative to the second dimmable panel to open or close the sunroof. The sunroof dimming system also includes a controller operatively coupled to the first and second dimmable panels. The controller is configured to adjust dimming associated with the first and second dimmable panels to maintain a brightness of an external light associated with a vehicle cabin that is experienced by a vehicle occupant when the sunroof changes between a closed state and an open state. ## Claims ### Claim 1 A sunroof dimming system for a vehicle, comprising: a first dimmable panel of a sunroof including first dimming bands; a second dimmable panel of the sunroof including second dimming bands, the first dimmable panel moveable relative to the second dimmable panel to open or close the sunroof; and a controller operatively coupled to the first dimmable panel and the second dimmable panel, the controller configured to adjust dimming of the first dimmable panel and the second dimmable panel to maintain a light intensity of an external light of a vehicle cabin when the sunroof changes between a closed state and an open state, determine a position of the first dimmable panel, determine overlapping dimming bands of the first dimming bands and the second dimming bands based on the position, and adjust an electrical parameter applied to the overlapping dimming bands maintain the light intensity. ### Claim 2 (depends on 1) The sunroof dimming system of claim 1, wherein the controller is configured to control one or more of the first dimming bands to change a visual characteristic associated with the first dimmable panel, and control one or more of the second dimming bands to change a visual characteristic associated with the second dimmable panel. ### Claim 3 (depends on 2) The sunroof dimming system of claim 2, wherein the first dimming bands or the second dimming bands are rectangular. ### Claim 4 (depends on 1) The sunroof dimming system of claim 1, wherein the controller is configured to increase a transparency associated with the first panel or a transparency associated with the second panel in response to the sunroof changing from the closed state to the open state. ### Claim 5 (depends on 1) The sunroof dimming system of claim 1, wherein the controller is configured to decrease a transparency associated with the first panel or a transparency associated with the second panel in response to the sunroof changing from the open state to the closed state. ### Claim 6 An apparatus, comprising: a sunroof controller configured to: control dimming of a first panel of a sunroof of a vehicle cabin and a second panel of the sunroof of the vehicle cabin, move, via a motor, the first panel relative to the second panel from a first position to a second position in which the first panel at least partially overlaps with the second panel, each of the first and second panels in a first visual state when the first panel is in the first position, adjust dimming of the first and second panels such that, when the first panel is in the second position, each of the first and second panels is in a second visual state different relative to the first visual state, determine an overlapping portion of the first panel and the second panel when in the second position, and adjust an electrical parameter applied to the overlapping portion maintain a light intensity of an external light of the vehicle cabin. ### Claim 7 (depends on 6) The apparatus of claim 6, wherein the sunroof controller is configured to: detect the light intensity within the vehicle cabin via a sensor when the first panel is in the first and second positions; and adjust a first electrical parameter applied to the first panel and a second electrical parameter applied to the second panel based on the light intensity to maintain the light intensity. ### Claim 8 (depends on 6) The apparatus of claim 6, wherein the sunroof controller is configured to: calculate a first adjustment associated with increasing a transparency of the first panel; calculate a second adjustment associated with increasing a transparency of the second panel; and control the first panel and the second panel based on the respective first and second adjustments to maintain the light intensity within the vehicle cabin in response to the sunroof changing from a closed state to an open state. ### Claim 9 (depends on 8) The apparatus of claim 8, wherein the first adjustment includes increasing a first voltage applied to the first panel, and wherein the second adjustment includes increasing a second voltage applied to the second panel. ### Claim 10 (depends on 6) The apparatus of claim 6, wherein the sunroof controller is configured to: determine a first area of the first panel and a second area of the second panel that are to overlap with each other when the first panel is in the second position; and adjust a first electrical parameter applied to the first area and a second electrical parameter applied to the second area to maintain the light intensity in response to the sunroof changing from a closed state to an open state. ### Claim 11 A tangible machine-readable storage medium including instructions that, when executed, cause a processor to at least: control dimming of a first panel of a sunroof of a vehicle cabin and a second panel of the sunroof of the vehicle cabin; move, via a motor, the first panel relative to the second panel from a first position to a second position in which the first panel at least partially overlaps with the second panel, each of the first and second panels in a first visual state when the first panel is in the first position; adjust dimming of the first and second panels such that, when the first panel is in the second position, each of the first and second panels is in a second visual state different relative to the first visual state; determine an overlapping portion of the first panel and the second panel when in the second position, and adjust an electrical parameter applied to the overlapping portion maintain a light intensity of an external light of the vehicle cabin. ### Claim 12 (depends on 11) The tangible machine-readable storage medium of claim 11, wherein the instructions cause the processor to: detect the light intensity within the vehicle cabin via a sensor when the first panel is in the first and second positions; and adjust a first electrical parameter applied to the first panel and a second electrical parameter applied to the second panel based on the light intensity to maintain the light intensity. ### Claim 13 (depends on 11) The tangible machine-readable storage medium of claim 11, wherein the instructions cause the processor to: calculate a first adjustment associated with increasing a transparency of the first panel; calculate a second adjustment associated with increasing a transparency of the second panel; and control the first panel and the second panel based on the respective first and second adjustments to maintain the light intensity within the vehicle cabin in response to the sunroof changing from a closed state to an open state. ### Claim 14 (depends on 13) The tangible machine-readable storage medium of claim 13, wherein the first adjustment includes increasing a first voltage applied to the first panel, and wherein the second adjustment includes increasing a second voltage applied to the second panel. ### Claim 15 (depends on 11) The tangible machine-readable storage medium of claim 11, wherein the instructions cause the processor to: determine a first area of the first panel and a second area of the second panel that are to overlap with each other when the first panel is in the second position; and adjust a first electrical parameter applied to the first area and a second electrical parameter applied to the second area to maintain the light intensity associated with the vehicle cabin when the first panel is in the first and second positions.