US-20260128013-A1 - Active Direct Driving of Pixels in Display, Signaling and Digital Signage Devices

Abstract

Various examples are provided related to active direct driving of pixels. In one example, an active direct driving matrix device includes VOLET pixels arranged to form an emissive display; bus lines including at least one VDD line routed along edges of the VOLET pixels and VDATA lines routed under the VOLET pixels, each VOLET pixel connected to a corresponding VDATA line of the VDATA lines. In another example, a method of fabricating an active direct driving matrix device includes forming a first layer of VDATA lines over a substrate; depositing a first insulating layer over the first layer of VDATA lines; forming a second layer of VDATA lines over the first insulating layer; depositing a second insulating layer over the second layer of VDATA lines; and forming VOLET pixels over the second insulating layer, each VOLET pixel electrically connected to a corresponding VDATA line.

Inventors

• Hiromitsu Katsui
• Xiao Chen
• Bo Liu
• Svetlana Viktorovna Vasilyeva
• Maxime Gregory Lemaitre

Assignees

• MATTRIX TECHNOLOGIES, INC.
• JSR CORPORATION

Dates

Publication Date

20260507

Application Date

20251027

Claims (20)

1. 1 . An active direct driving matrix device, comprising: an array of VOLET pixels arranged to form an emissive display; bus lines comprising at least one VDD line routed along edges of the array of VOLET pixels and a plurality of VDATA lines routed under the array of VOLET pixels, each VOLET pixel of the array of VOLET pixels connected to a corresponding VDATA line of the plurality of VDATA lines.
2. 2 . The active direct driving matrix device of claim 1 , wherein the array of VOLET pixels share a common VDD-cathode voltage difference through the at least one VDD line.
3. 3 . The active direct driving matrix device of claim 1 , wherein the plurality of VDATA lines and at least one VDD line are routed in different directions to a periphery of the emissive display.
4. 4 . The active direct driving matrix device of claim 1 , wherein the array of VOLET pixels is arranged in rows and columns, with one or more VDD line extending along each row and the plurality of VDATA lines comprising corresponding VDATA lines extending to each VOLET pixel in that column.
5. 5 . The active direct driving matrix device of claim 4 , wherein the corresponding VDATA lines extending to each VOLET pixel in a column extend a different length under the VOLET pixels in the column.
6. 6 . The active direct driving matrix device of claim 5 , wherein the corresponding VDATA lines extending under the VOLET pixels in the column comprise at least two layers of corresponding VDATA lines separated by an insulating layer.
7. 7 . The active direct driving matrix device of claim 6 , wherein the VDATA lines of the at least two layers are aligned, and are overlapping when viewed from a direction perpendicular to an emission surface of the VOLET pixel.
8. 8 . The active direct driving matrix device of claim 6 , wherein the VDATA lines of the at least two layers are aligned, and have offsets without overlapping when viewed from a direction perpendicular to an emission surface of the VOLET pixel.
9. 9 . The active direct driving matrix device of claim 6 , wherein the VDATA lines of the at least two layers are perpendicular between adjacent layers when viewed from a direction perpendicular to an emission surface of the VOLET pixel.
10. 10 . The active direct driving matrix device of claim 6 , wherein a connection between a VOLET pixel and its corresponding VDATA line in one of the at least two layers comprises a stacked-via structure, the stacked-via structure comprising a plurality of vertically aligned vias extending through insulating layers separating the at least two layers of corresponding VDATA lines.
11. 11 . The active direct driving matrix device of claim 6 , wherein a connection between a VOLET pixel and its corresponding VDATA line in one of the at least two layers comprises a staggered-via structure, wherein vias connecting successive conductive layers are laterally offset from one another.
12. 12 . The active direct driving matrix device of claim 6 , wherein a connection between a VOLET pixel and its corresponding VDATA line in one of the at least two layers comprises a semi-staggered via structure, wherein vias are vertically aligned across a first set of adjacent insulating layers and are laterally offset across a second set of adjacent insulating layers.
13. 13 . The active direct driving matrix device of claim 4 , wherein the corresponding VDATA lines extend from opposite sides of the array of VOLET pixels.
14. 14 . The active direct driving matrix device of claim 1 , wherein the plurality of VDATA lines comprise a transparent conductive oxide or transparent conducting film.
15. 15 . The active direct driving matrix device of claim 1 , wherein brightness of each VOLET pixel in the array of VOLET pixels is compensated based upon number of VDATA lines under that pixel.
16. 16 . The active direct driving matrix device of claim 1 , comprising a plurality of dummy VDATA lines routed under the array of VOLET pixels, wherein a combined number of VDATA and dummy VDATA lines routed under each VOLET pixel of the array of VOLET pixels is equal.
17. 17 . The active direct driving matrix device of claim 16 , wherein the plurality of dummy VDATA lines are patterned to substantially replicate a layout of the plurality of VDATA lines to normalize a parasitic capacitance or an optical transmittance for each VOLET pixel in the array of VOLET pixels.
18. 18 . The active direct driving matrix device of claim 16 , wherein the dummy VDATA lines are electrically floating or are connected to a fixed potential.
19. 19 . The active direct driving matrix device of claim 1 , wherein each VOLET pixel is visibly discernable to a user.
20. 20 . The active direct driving matrix device of claim 19 , wherein each VOLET pixel has a shape of a triangle.

Description

CROSS REFERENCE TO RELATED APPLICATIONS This application claims priority to, and the benefit of, U.S. provisional application entitled “Active Direct Driving of Pixels in Display, Signaling and Digital Signage Devices” having Ser. No. 63/712,694, filed Oct. 28, 2024, which is hereby incorporated by reference in its entirety. BACKGROUND Automotive vehicles are equipped with multiple sets of external lighting fixtures essential for safety, signaling, and visibility. The evolution of vehicle external lighting has seen significant technological advancements, from the early use of incandescent bulbs to the more efficient halogen lamps. The industry experienced a revolutionary leap with the introduction of Light Emitting Diodes (LEDs), which offered superior longevity, lower energy consumption, and greater design flexibility. Modern innovations like Organic Light Emitting Diodes (OLEDs) and laser lighting technology continue to push the boundaries, providing precise lighting control and new integration possibilities into vehicle bodywork. SUMMARY Aspects of the present disclosure are related to active direct driving of pixels in, e.g., display, signaling and digital signage devices. In one aspect, among others, an active direct driving matrix device, comprises an array of VOLET pixels arranged to form an emissive display; bus lines comprising at least one VDD line routed along edges of the array of VOLET pixels and a plurality of VDATA lines routed under the array of VOLET pixels, each VOLET pixel of the array of VOLET pixels connected to a corresponding VDATA line of the plurality of VDATA lines. In one or more aspects, the array of VOLET pixels can share a common VDD-cathode voltage difference through the at least one VDD line. The plurality of VDATA lines and at least one VDD line can be routed in different directions to a periphery of the emissive display. The array of VOLET pixels can be arranged in rows and columns, with one or more VDD line extending along each row and the plurality of VDATA lines comprising corresponding VDATA lines extending to each VOLET pixel in that column. The corresponding VDATA lines extending to each VOLET pixel in a column can extend a different length under the VOLET pixels in the column. The corresponding VDATA lines extending under the VOLET pixels in the column can comprise at least two layers of corresponding VDATA lines separated by an insulating layer. The VDATA lines of the at least two layers can be aligned, and can be overlapping when viewed from a direction perpendicular to an emission surface of the VOLET pixel. The VDATA lines of the at least two layers can be aligned, and can have offsets without overlapping when viewed from a direction perpendicular to an emission surface of the VOLET pixel. The VDATA lines of the at least two layers can be perpendicular between adjacent layers when viewed from a direction perpendicular to an emission surface of the VOLET pixel. In some aspects, a connection between a VOLET pixel and its corresponding VDATA line in one of the at least two layers can comprise a stacked-via structure, the stacked-via structure comprising a plurality of vertically aligned vias extending through insulating layers separating the at least two layers of corresponding VDATA lines. A connection between a VOLET pixel and its corresponding VDATA line in one of the at least two layers can comprise a staggered-via structure, wherein vias connecting successive conductive layers are laterally offset from one another. A connection between a VOLET pixel and its corresponding VDATA line in one of the at least two layers can comprise a semi-staggered via structure, wherein vias are vertically aligned across a first set of adjacent insulating layers and are laterally offset across a second set of adjacent insulating layers. The corresponding VDATA lines can extend from opposite sides of the array of VOLET pixels. In various aspects, the plurality of VDATA lines can comprise a transparent conductive oxide or transparent conducting film. Brightness of each VOLET pixel in the array of VOLET pixels can be compensated based upon number of VDATA lines under that pixel. The active direct driving matrix device can comprise a plurality of dummy VDATA lines routed under the array of VOLET pixels, wherein a combined number of VDATA and dummy VDATA lines routed under each VOLET pixel of the array of VOLET pixels is equal. The plurality of dummy VDATA lines can be patterned to substantially replicate a layout of the plurality of VDATA lines to normalize a parasitic capacitance or an optical transmittance for each VOLET pixel in the array of VOLET pixels. The dummy VDATA lines can be electrically floating or can be connected to a fixed potential. Each VOLET pixel can be visibly discernable to a user. Each VOLET pixel can have a shape of a triangle. Each VOLET pixel can comprise an arbitrary closed shape. The array of VOLET pixels can consist of pixels with a variety of shapes. Each