Lg Display Co., Ltd.

Industry-university Cooperation Foundation Hanyang University

Yong Sang Yoo

Byong Deok Choi

Kiseok Chang

Jihwan Jung

Yong Duck Kim

Moonbong Song

Jeongmin Moon

SoonShin Jung

Jeong Min Moon

Moon Bong Song

Soon Shin Jung

Disclosed are a pixel circuit comprising an optical fingerprint sensing circuit, a method of driving a pixel circuit comprising an optical fingerprint sensing circuit, and a display device comprising a pixel circuit comprising an optical fingerprint sensing circuit. According to the present disclosure, the pixel circuit comprising an optical fingerprint sensing circuit comprises a pixel control circuit, the pixel control circuit comprising: a first photodetector which receives a light and generates a first signal; a second photodetector which receives a light and generates a second signal; and a self-illuminator which receives differential signals of the first signal and second signal and outputs an output signal, includes at least one transistor component and at least one capacitor component, and outputs a light on the basis of a data signal.

Pixel circuit comprising optical fingerprint sensing circuit, method for driving pixel circuit, and organic light-emitting display device

The present disclosure relates to a pixel circuit including an optical fingerprint sensing circuit, a method for driving a pixel circuit including the optical fingerprint sensing circuit, and a display device including the pixel circuit including the optical fingerprint sensing circuit. The pixel circuit includes: a self-light emitting element which displays images by a driving current controlled by a driving transistor; and a light-receiving element which receives light emitted from the self-light emitting element and reflected through a fingerprint of a user and converts it into a photocurrent. The driving transistor functions as a buffer which transmits an output voltage of the light-receiving element to an output line of the pixel circuit.

Pixel circuit including optical fingerprint sensing circuit, method for driving pixel circuit, and organic light emitting display device

The present disclosure related to an optical fingerprint identification display and a driving method thereof. In the optical fingerprint identification display and the driving method thereof, the fingerprint identification display includes: a display panel and a processor. The display panel includes a plurality of pixels arranged in a two-dimensional matrix. The pixel includes: at least one subpixel which emits light on the basis of a first signal received from the processor; and an optical sensor which receives the light emitted from the subpixel and is reflected from a fingerprint and generates a second signal. The processor determines a touch region on the display panel, and transmits the first signal to one or more pixels included in the touch region, and identifies the fingerprint of the user on the basis of the second signal received from the pixel.

Optical-type fingerprint recognition display and operation method thereof

Growing community of inventors

Seoul, South Korea

Yong Sang Yoo