Sharp Kabushiki Kaisha Corporation

Shapr Kabushiki Kaisha

Naoto Inoue

Tomohiko Yamamoto

Keiichi Tanaka

Hideki Ichioka

Koji Fujiwara

Kouji Fujiwara

Akira Tomiyoshi

Naoko Goto

Chie Toridono

Tomoyuki Nara

Hiroyuki Furukawa

Yutaka Ishii

Hidekazu Miyata

Masafumi Ueno

Hisashi Nagata

Noboru Noguchi

Yasunobu Tagusa

Hisao Okada

Osamu Teranuma

Masayuki Takahashi

Yuhsaku Ajichi

Youji Yoshimura

Shinji Suminoe

Yasunori Ake

Aya Nakatani

A light-emitting element includes a light-emitting layer, an upper electrode provided on a first side of the light-emitting layer, and a lower electrode provided on a second side of the light-emitting layer opposite to the first side. The lower electrode is constituted by a first electrode and a second electrode including a first gap therebetween, the second electrode having an area larger than that of the first electrode. The upper electrode is constituted by a third electrode and a fourth electrode including a second gap therebetween, the third electrode facing the first electrode and the second electrode, the fourth electrode facing the second electrode and having an area smaller than that of the third electrode.

Light-emitting element and display device

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: light-emitting elements in a backlight divided into a plurality of areas, the light-emitting elements being arranged in such a manner as to correspond to the plurality of areas; and a drive unit configured to drive the light-emitting elements in the plurality of areas by time division based on an input image every prescribed period of time, the drive unit turning on all the light-emitting elements in the plurality of areas in a partial period of the prescribed period of time and driving those light-emitting elements in at least one of the plurality of areas based on the input image in a remaining period of the prescribed period of time.

Display device

In a display device, a drive circuit drives LEDs arranged in n rows (n is an integer equal to or greater than two) so as to correspond to a plurality of areas of a backlight, row by row through division into n time slots or every k rows (k is an n's divisor equal to or greater than two and is smaller than n) through division into n/k time slots in accordance with the status of use of the display device.

A backlight is configured by a power supply switching circuit configured to switch a supply destination of a power source voltage for LED driving among a plurality of blocks, a plurality of power source lines which are provided in one-to-one correspondence with the plurality of blocks and are each connected to an upstream end of each of LED units included in a corresponding block, an LED drive circuit including the same number of turn-on control switches, which are for controlling whether to supply a current to LEDs, as LED units included in each block, and one or more discharge control circuits provided for each block. The discharge control circuit lowers a voltage level at the upstream end of each of LED snits included in a corresponding block after an end of a period in which the power source voltage is supplied to the corresponding block.

Backlight and display device provided with same

In an edge-light type backlight device having a configuration in which an LED mounting board with four LEDs (() to()) placed thereon is disposed on one end side of a display unit and an LED mounting board with four LEDs (()-()) placed thereon is disposed on the other end side of the display unit, a cathode terminal of an LED (()) disposed most downstream on the LED mounting board disposed on the one end side of the display unit and an anode terminal of the LED (()) disposed most upstream on the LED mounting board disposed on the other side end of the display unit are connected through wiring on an LED drive board. All of the LEDs (() to()) are driven by only one DC-DC converter ().

Backlight device, and display device provided with same

Object: To provide a backlight device for a liquid crystal display device which can suppress occurrence of power loss in any of light emitting bodies, and a liquid crystal display device including the backlight device. Solution to Problem: In a cluster (), arranged are two magenta light emitting bodies () including a blue light emitting element () with high drive voltage and red phosphors () covering the blue light emitting element (), two green light emitting bodies (), and one blue light emitting body (). With this configuration, since two blue LED elements () are implemented also in two magenta light emitting bodies (), the drive voltage of the magenta light emitting bodies () is substantially equal to the drive voltage of the green light emitting bodies () and the blue light emitting body ().

Backlight device and liquid crystal display device including same

By a simple circuit configuration, luminance unevenness is suppressed, and charge remaining after a power source supply is interrupted is suppressed. A slope control unit () generates a switch control signal (Von) having a waveform with a falling slope, by switching between a grounded state of being connected to a ground and an ungrounded state, and modulating the waveform of a high voltage (VGH), and in a case where a power supply from the outside is interrupted, the slope control unit () is in the ungrounded state.

Display apparatus with waveform adjuster generating switch control signal by switching between grounded state and ungrounded state

Disclosed is a liquid crystal display device wherein display performance of a two-dimensional image and that of a three-dimensional image are both improved. The liquid crystal display device is provided with: a liquid crystal display panel, which displays the two-dimensional image and the three-dimensional image by selectively switching the images; and a backlight, which supplies light to the liquid crystal display panel. The backlight includes an illuminating region, which is scan-lighted corresponding to scanning of the liquid crystal display panel, and the scanning frequencies of the illuminating region at the time of displaying the two-dimensional image and the three-dimensional image on the liquid crystal display panel are different from each other.

Liquid crystal display device and television receiver

An illumination device includes an LED package, an LED driver including an FET, and a thermistor disposed on a substrate. A plurality of such LED packages are disposed on the substrate such that a first area and a second area, each determined by vertices corresponding to LED packages, are defined on the substrate. The thermistor is disposed in the first area, and the FET is disposed in the second area, which is outside of the first area. The thermistor detects a temperature in the first area. Such a configuration allows the thermistor to detect, in accordance with the temperature in the area, the temperature of heat transferred from the LED packages, without being affected by heat generated by the FET. This makes it possible to efficiently make temperature corrections to stabilize color temperature and luminance.

Illumination device and liquid crystal display device

The invention concerns an input device including an input receiving panel and a stylus enabling an input, the input device sensing an input by means of capacitive coupling between a panel electrode on the input receiving panel and a stylus electrode on the stylus, and includes: a signal supply section supplying an input sensing signal to the panel electrode; a signal detecting circuit detecting a signal generated in the stylus electrode; and an input sensing section comparing the input sensing signal with the detection signal detected by the signal detecting circuit and sensing an input based on a result of the comparison. An input-sensing digital code is superimposed on the input sensing signal. This allows for further reduction in the possibility of false sensing caused by noise than conventional techniques.

Input device and I/O-integrated display

When a display panel is in contact with the pen tip of an input pen, an infrared receiver and at least two ultrasonic receivers, provided on the display panel, receive respectively an infrared signal and an ultrasonic signal simultaneously transmitted from an infrared transmitter and an ultrasonic transmitter, and computes the contact position of the pen tip on the display panel from a result, containing a time delay, of the ultrasonic receiver receiving the ultrasonic signal with reference to a time when infrared signal is received. The input pen includes a piezoelectric element sensing pen pressure when the pen tip is in contact with the display panel and a microcomputer controlling a infrared transmitter to transmit an infrared signal which changes in accordance with the pen pressure. Thus, in ultrasonic pen input operation, information on the sensed pen pressure is wirelessly transmitted to the device main body, so as to provide a pen input/display device realizing multifunctional, high performance pen input operation based on the pen pressure information in a simple manner.

Pen input/display device

A pen input unit includes ultrasonic receivers that receive an ultrasonic signal transmitted from an ultrasonic transmitter of an input pen. Based on the received signal, the distance (distance value) of the ultrasonic transmitter from each of the ultrasonic receivers is determined. The distance value is used for the display control of the display panel, and is supplied to a reception sensitivity control section. The reception sensitivity control section carries out reception sensitivity control for reducing a difference in level of the respective waveforms received by the ultrasonic receivers. As a result, a pen input display device of an ultrasonic pen input system is provided that prevents errors over the entire input area of the display panel without increasing power consumption or impairing operability of pen entry.

Pen input display device

In an image display device which employs pulse width modulation driving, a voltage which is less than a voltage supplied to signal lines is applied to pixel electrodes. Tones are displayed by shifting phases of waveforms of the signal lines and scanning lines, and polarities of pixels in a signal line direction are inverted alternately. This prevents increase in power consumption which is caused by pulse intervals which become too small at high tone levels, in addition to preventing change in tone level due to external factors such as temperature, or signal delays in a driver or wiring.

Driving method of image display device, driving device of image display device, and image display device

An image display apparatus comprising an image display device, a shield member, and a drive mechanism. The drive mechanism drives the shield member in synchronization with display of the image.

Growing community of inventors

Shiki-gun, Japan

Naoto Inoue