Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Shinya Yamamoto

Takafumi Hamano

Hiroshi Shirouzu

Tetsuro Nakamura

Kenichi Masumoto

Akira Gyoutoku

Tetsurou Nakamura

Yuji Toyomura

To provide an exposure device and an image forming apparatus using the same, in which the exposure device can detect light intensity with improved reliability and thereby controls the light intensity with high precision, the exposure device includes an EL (electro-luminescence) element having a first electrode (an anode), a second electrode (a cathode), and a light emitting layer disposed between the first and second electrodes, thereby forming a light emitting unit, and a light detecting element detecting light emitted from the EL element, in which the EL element and the light detecting element are stacked onto each other. The light detecting element is provided at an inner side of a principal surface of the electrode (the anode) which is disposed closer to the light detecting element than the other electrode. A light emitting area of the EL element is provided at an inner side of a principal surface of the light detecting element.

Exposure device and image forming apparatus using the same

Providing an exposure unit using an organic electroluminescence element with a large emitted light quantity. The organic electroluminescence element has, on a substrate, an anodeacting as a hole injection electrode, a cathodeacting as an electron injection electrode, a first and second emission layersandeach having a light emission region, and a charge generation layerinjecting electrons into the light emission layerlying close to the anodeand injecting holes into the light emission layerlying close to the cathode, these layers being arranged between the anodeand the cathode

Organic electroluminescence element and an exposure unit and image-forming apparatus both using the element

Growing community of inventors

Fukuoka, Japan

Shinya Yamamoto