Electroluminescence element
AssigneeKabushiki Kaisha Toyota Jidoshokki
InventorsHiroyasu Kawauchi, Masayuki Harada, Norihito Takeuchi, Masato Hieda
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Abstract
An electroluminescence element includes a first electrode, a second electrode, and a light emission layer arranged between the first electrode and the second electrode. The first electrode is formed of a material having a higher volume resistivity than that of the material of the second electrode. A connector portion electrically connects a feeder portion to the first electrode. The resistance value of the connector portion differs in correspondence with a position at which the connector portion connects the feeder portion to the first electrode. The brightness distribution of the electroluminescence element is thus adjusted to a desired state.
Claims22
An electroluminescence element comprising:
- a first electrode;
- a second electrode, the first electrode being formed of a material having a higher volume resistivity than that of a material forming the second electrode;
- a light emission layer arranged between the first electrode and the second electrode;
- a feeder portion;
- and
- a connector portion for electrically connecting the feeder portion to the first electrode, the connector portion having a resistance value differing in correspondence with a position at which the connector portion connects the feeder portion to the first electrode.
An electroluminescence element comprising:
- a first conductive layer having a terminal portion that can be connected to an external driver circuit;
- a light emission layer deposited on the first conductive layer;
- a second conductive layer formed on the light emission layer, the first conductive layer being formed of a material having a higher volume resistivity than that of a material forming the second conductive layer;
- an auxiliary electrode layer provided in correspondence with a portion of the first conductive layer, the auxiliary electrode layer being formed of a material having a lower volume resistivity than that of the material of the first conductive layer;
- and
- a high resistance portion formed of a material having a higher volume resistivity than that of the material of the first conductive layer, wherein the high resistance portion is arranged between the first conductive layer and the auxiliary electrode layer and adjacent to a portion of the light emission layer, the high resistance portion extending along a side of the light emission layer, and wherein the high resistance portion has a length defined along a direction in which the side of the light emission layer extends and a width perpendicular to the length, the width of the high resistance portion differing in correspondence with the distance between the high resistance portion and the terminal portion.
Dependencies are inferred from the claim text.