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Light emitting device having a plurality of light emitting parts with brightnesses decreased in a direction

  • US 10,643,972 B2
  • Filed: 11/04/2016
  • Issued: 05/05/2020
  • Est. Priority Date: 11/05/2015
  • Status: Active Grant
First Claim
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1. A light emitting device comprising:

  • an organic EL panel disposed on a vehicle where a plurality of light emitting parts is arranged toward a predetermined direction approximately perpendicular to a front-back direction of the vehicle, wherein the plurality of light emitting parts are separated by non-light emitting parts, wherein the plurality of light emitting parts is configured such that brightness is decreased gradually toward the predetermined direction, wherein the non-light emitting parts comprise insulation layers embedded on corresponding portions of an organic layer of the organic EL panel, wherein the organic EL panel comprises;

    an anode, an organic layer, a cathode, an anode power supply wiring electrically connected to the anode, and a cathode power supply wiring electrically connected to the cathode, wherein all of the insulation layers are entirely disposed between the anode and the cathode in a stacking direction of the anode, the organic layer, and the cathode, wherein the anode power supply wiring and the cathode power supply wiring are disposed along an outer periphery of an outermost light emitting part of the plurality of light emitting parts, wherein the anode power supply wiring is disposed on a first part of the outer periphery of the outermost light emitting part, wherein the cathode power supply wiring is disposed on a second part of the outer periphery of the outermost light emitting part where the anode power supply wiring is not disposed, wherein, the anode is a transparent electrode, the anode extends continuously over the plurality of light emitting parts, and the anode of each light emitting part is supplied with power via the anode from the anode power supply wiring on the first part of the outer periphery of the outermost light emitting part, and wherein a resistance of the anode decreases voltage traveling therethrough, such that brightnesses of the plurality of light emitting parts decrease in order in correspondence with an increase in a distance from the anode power supply wiring, wherein the plurality of light emitting parts is configured such that areas of the light emitting parts are reduced gradually toward the predetermined direction.

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