Patent ID: 9704925
Date: 2017-07-11
CPC Classifications: H01L

Claim:
1. An EL display device, comprising: a light emitter configured to emit at least red, green, and blue light; and a thin film transistor array configured to control light emission of the light emitter, wherein the light emitter includes light-emitting layers configured to emit at least red, green, and blue light, the light-emitting layers being disposed within areas defined by a bank, the light emitter further includes electrodes that extend under the bank and hole transport layers that are above the electrodes and within the areas defined by the bank, the light-emitting layers being formed on the hole transport layers, the hole transport layers each have a peripheral protrusion in contact with a side surface of the bank and a main portion, the peripheral protrusion protruding upwards from the main portion, for each of the hole transport layers, an average film thickness of a peripheral portion that includes the peripheral protrusion is greater than an average film thickness of the main portion, the light-emitting layers each have a peripheral protrusion in contact with a side surface of the bank, the peripheral protrusions of the light-emitting layers being formed above corresponding ones of the peripheral protrusions of the hole transport layers, and an average film thickness of the peripheral protrusion of each of the light-emitting layers is at least 20% of an average film thickness of a main portion of each of the light-emitting layers.