Sharp Kabushiki Kaisha Corporation

Masafumi Ueno

Hiroyuki Furukawa

Naoki Shiobara

Kenichiroh Yamamoto

Masaaki Moriya

Yasuhiro Yoshida

Takashi Yoshii

Chie Toridono

Yasuhiro Ohki

Xiaomang Zhang

Seiji Kohashikawa

Takeshi Mori

Masafumi Kawai

Tomohiro Kimura

Shigeto Yoshida

Kazuyoshi Yoshiyama

Ikuko Tsubaki

Toshiharu Hanaoka

Mohammad Reza Kazemi

Yasuhiro Sugita

Takeshi Masuda

Yoshihiro Ueta

Shinji Yamagishi

Masayuki Takahashi

Naoto Inoue

Jean Mugiraneza

Kenji Takase

Takashi Ishizumi

Mitsuru Hineno

Tomohiro Omatsu

Naoko Kondo

A display device includes: a display panel including a plurality of pixels each provided with a first subpixel and a second subpixel; a storage unit that stores degradation information indicating an amount of decrease in light emission efficiency of one of the first subpixel or the second subpixel; and a control unit that corrects an input video signal, input from outside, in accordance with the degradation information, and generates a video signal to be supplied to each of the first subpixel and the second subpixel.

Display device capable of measuring degradation in one sub-pixel out of two sub-pixels

A display device includes a display panel including a group of pixels; a control unit configured to execute deterioration monitoring for detecting a decrease in luminous efficiency of the group of pixels and first high-speed monitoring for determining whether to execute the deterioration monitoring, the first high-speed monitoring being executed at a faster speed than the deterioration monitoring; and a storage unit configured to store reference data specifying an acceptable range for executing the deterioration monitoring. The control unit executes the deterioration monitoring in a case where a first high-speed monitoring measurement value obtained by the first high-speed monitoring is within the acceptable range.

Display device

A display device includes: a first subpixel including a quantum dot light-emitting layer configured to emit light of a first color: a second subpixel including a quantum dot light-emitting layer configured to emit light of a second color different from the light of the first color: a third subpixel including a quantum dot light-emitting layer configured to emit light of a third color different from the light of the first color and the light of the second color: and a data processing circuit configured to receive a first input data corresponding to the first subpixel, a second input data corresponding to the second subpixel, and a third input data corresponding to the third subpixel. The data processing circuit generates first output data corresponding to a first data voltage supplied to the first subpixel by using the first input data, the second input data, and the third input data.

A display device includes a substrate with a display area and a bending area; and a luminance sensor. The display area and the bending area each include a pixel circuit including a light-emitting element that is self-luminous. The bending area is bent from the display area. The luminance sensor measures luminance of the light-emitting element in the bending area.

Luminance sensor for bent display

A display device includes: a display panel including a plurality of pixels, the pixels including a first subpixel and a second subpixel each including a light-emitting layer emitting light of a first color, a third subpixel including a light-emitting layer emitting light of a second color, and a fourth subpixel including a light-emitting layer emitting light of a third color; a first power supply configured to supply a current to the first subpixel and the third subpixel; a second power supply configured to supply a current to the second subpixel and the fourth subpixel; and a signal processing circuit configured to receive an input signal for each pixel and generate a first signal corresponding to the first subpixel and a second signal corresponding to the second subpixel.

Display device that prevents a decrease in luminance resulting from drop in voltage

A display device includes a plurality of pixel circuits each including a self-luminous element and a switching element that performs switching between light emission and non-light emission of the self-luminous element, the plurality of pixel circuits being provided respectively corresponding to a plurality of pixels, and a control circuit that controls each of the plurality of pixel circuits in response to an image signal of an image to be displayed. The control circuit controls switching between the light emission and the non-light emission by the switching element and thus the self-luminous element emits light at least in a certain period from the start of the dimming control period and a certain period until the end of the dimming control period.

A display device includes a pixel including light-emitting elements in which light emission luminance during a predetermined period is controlled by controlling a lighting period among the predetermined period, and light-emitting elements in which light emission luminance is controlled by controlling a current value.

Display device luminance determined by controlling a first light-emitting element's lighting period and a second light-emitting element's current value

A first pixel electrode electrically connected to a first transistor, a second pixel electrode electrically connected to a second transistor, a first light-emitting layer formed over the first pixel electrode and overlapping the first pixel electrode, a second light-emitting layer formed over the second pixel electrode and overlapping the second pixel electrode are provided, the first light-emitting layer includes a quantum-dot light-emitting that emits light of a first color, and the second light-emitting layer includes an organic light-emitting layer that emits light of a second color different from the first color.

Display device with enhanced light extraction efficiency

A display device includes a display panel, a temperature sensor, a characteristics measuring unit, a correction value computation unit, a correction processing unit, and a display control unit. A plurality of pixel circuits include, as an element, a light-emitting element; and a drive transistor configured to control an electric current that flows in the light-emitting element. The characteristics measuring unit obtains the measurement value when the temperature is in a predetermined temperature range and does not obtain the measurement value when the temperature is out of the temperature range.

The display device is provided with a degree-of-degradation calculating circuit that determines a degree of degradation representing a level of degradation of a compensation-target circuit element included in each of K pixel circuits which are some or all of a plurality of pixel circuits; a variation coefficient calculating circuit that calculates, as a variation coefficient, a value depending on a deviation determined based on degrees of degradation of the K pixel circuits; a reference luminance setting circuit that sets, based on the variation coefficient, reference luminance for determining display luminance of each display element after degradation compensation; and a compensation computing circuit that compensates for degradation of the compensation-target circuit elements by correcting input video signals based on the reference luminance and the degree of degradation of each of the K pixel circuits, upon generating video signals to be supplied to the plurality of pixel circuits.

Display device and driving method therefor

The present application discloses a current-driven display device that can perform accurate external compensation in consideration of a temperature distribution in a display panel while preventing the configuration from being complicated. A display portion of an organic EL display device is provided with a plurality of temperature detection circuits in addition to pixel circuits arranged in a matrix. A data-side drive circuit measures a current flowing through a transistor in each temperature detection circuit. A display control circuit obtains a temperature from the measured value based on a temperature characteristic of the transistor, estimates a temperature of each pixel circuit from the temperature, corrects a current value measured at the time of characteristic detection for a drive transistor of each pixel circuit considering the estimated temperature, and updates correction data for compensating for variations in the threshold voltage and gain of the drive transistor based on the corrected current value.

Display device and drive method for same

Display device with pixel structure capable of extracting light from quantum-dot light-emitting layer and organic light-emitting layer of pixel structure

A display device includes: a light-emitting profile creation circuit creating a first light-emitting profile from a first image signal; and an image signal adjustment circuit adjusting a second image signal in accordance with the first light-emitting profile.

Display device and image processing method

A display device includes: a temperature distribution obtaining circuit obtaining temperature distribution on a display panel on a basis of a capacitance value signal to be output from a capacitive touch panel overlapping the display panel; and a correcting circuit correcting an input image signal on a basis of the temperature distribution on the display panel, and supplying the input image signal.

Display device for temperature correction of an input image signal on a touch display panel

A display device is implemented that can more efficiently compensate for degradation of drive transistors by promptly determining an average degradation level of the drive transistors on the entire screen. The display device is provided with a total current measuring circuit () that measures, as a total current, drive currents flowing through all of a plurality of pixel circuits or two or more pixel circuits in a state where a specific image is displayed; a determination data storage unit () that holds determination data used to determine whether to perform characteristics detection monitoring for detecting characteristics of the drive transistors; and a determining unit () that determines whether to perform the characteristics detection monitoring, based on the total current and the determination data.

Growing community of inventors

Osaka, Japan

Masafumi Ueno