Sharp Kabushiki Kaisha Corporation

Kohji Fujiwara

Takayuki Murai

Tomohiro Kimura

Tomohiko Yamamoto

Hideki Ichioka

Katsuya Otoi

Katsuteru Hashimoto

Hirofumi Murakami

Hiroyuki Ogawa

Yasuhiro Sugita

Hiroshi Fukushima

Shinji Yamagishi

Takao Imaoku

Tetsuya Ueno

Akiko Miyazaki

Naoko Kondoh

Takatomo Yoshioka

Takao Muroi

Toshiharu Kusumoto

Kingfoong Lew

An electronic device capable of detecting a rotation amount of a dial without depending on a mechanism is achieved. A ring-like shape dial surrounds a peripheral edge of an electrostatic type touch panel, the dial includes a conductive pattern, which is formed of a conductive material, on an inner surface facing the touch panel.

Electronic device

A display device () includes a display panel (), a touch panel () for detecting contact of a target object with a display region (P) of the display panel () or approach thereof to the display region (P), and a casing () containing the display panel () and the touch panel (), a minimum distance (d) between the touch panel () and an outside surface (A) being not larger than a detectable distance, within which the touch panel () is capable of detecting the contact of the target object with the outside surface (A) or the approach thereof to the outside surface (A).

Display device, portable terminal, monitor, television, and method for controlling display device

The light emitting device is divided into a plurality of areas, and has, as main configuration elements, an area drive circuit (), which generates LED data and LCD data, an LED controller (), and a backlight unit (), which is provided with a plurality of LEDs () corresponding to each of the areas. The power calculating unit of the LED controller () is mainly configured of a power calculating circuit (), a power limiter circuit (), and a limit value updating circuit (), and the emission power to be supplied to each of the LEDs () is calculated for each are on the basis of image data. The power calculating unit performs the calculation such that the sum (Psum) of the emission power does not exceed a power limit value (Plimit) currently set, and updates the power limit value (Plimit) by following a previously set pattern.

Light emitting device for image display, and image display device

A display device is provided with: a display module that is provided with a first display region and a second display region; an optical member that faces the second display region, and that has a transmissive mirror portion; and a positioning member. The display module and the optical member respectively have end faces in contact with the positioning member, and end faces as free ends.

Display apparatus

A backlight unit includes excellent heat radiation characteristics. The backlight unit of an embodiment of the present invention includes a chassis and a light source attached to the chassis. As the light source, an LED is preferably used. The chassis includes an aluminum base or aluminum layer, and a porous alumina layer or pore-sealed porous alumina layer provided on the surface of the aluminum base or aluminum layer.

Backlight unit and liquid crystal display device

In the present liquid crystal display device, an LED output value correction section () included in an area-active drive processing section () corrects LED data Dbl obtained by an LED output value calculation section () with reference to a luminance correction LUT (), such that the luminance in the area from an intermediate value to near a maximum value shifts to a higher degree. Thus, even if the backlight luminance is low (typically, the mean luminance of an input image is low), contrast ratio is enhanced, thereby preventing a tone jump (insufficient luminance) at high tone levels due to an insufficient backlight luminance.

Image display device and image display method

A micon unit () performs, along at least one direction within the plane of planar light, brightness correction processing for adjusting brightness distribution of the planar light on light source color video signals (RSd, Gsd and BSd) so as to change them into light source color video signals (RSd', GSd&#x2032; and BSd&#x2032;), and the micon unit () further calculates the total light emission power of all LEDs () based on the light source color video signals (RSd&#x2032;, GSd&#x2032; and BSd&#x2032;), and performs, when the total light emission power exceeds an allowable light emission power, light emission power correction processing on the light source color video signals (RSd&#x2032;, GSd&#x2032; and BSd&#x2032;).

Illumination device, display device, data generation method, non-transitory computer readable recording medium including data generation program for generating light amount adjustment data based on temperature

Specifically provided is a light emitting device for image display, wherein each of light emitting elements, a PWM control unit which PWM-controls a current to be supplied to the light emitting element, a control condition setting unit which, according to the APL of image data, determines and updatably sets the PWM limiting condition for limiting the PWM value that is the duty ratio of the PWM control, and the reference current value that is the value of the current flowing to the light emitting element in response to turn-on of the PWM control, and a PWM value calculation unit which on the basis of the image data, the PWM limit condition, and the reference current value, calculates the PWM value of each area, and the PWM control unit performs the PWM control on the basis of the reference current value and the calculated PWM value.

Light emitting device for image display, image display apparatus, and LED driver

Provided is a backlight unit () which includes a plurality of LEDs (). The LEDs () are two-dimensionally disposed, thereby having the collection of light emitted from the LEDs () in a state of planar light. Furthermore, the backlight unit () has the planar light divided into a plurality of sections, and includes a luminance variable system (for instance, a system having disposition which a difference in the density of LEDs ()), which can change luminance, corresponding to each section.

Illuminating apparatus and display apparatus

In an image display device which performs area-active drive, backlight sources are emitted with appropriate luminances while inhibiting increase in power consumption and inhibiting reduction of image quality. An emission luminance calculation section divides an input image into a plurality of areas, and obtains luminances upon emission (first emission luminances) of LEDs in the areas. A plurality of correction modes are prepared as methods for correcting the first emission luminances, and a correction mode that is applied to an emission luminance correction process (selected correction mode) is stored to a correction mode storage section. For any LED units whose flag data stored in a correction-enabled map has the value of 1, an emission luminance correction section corrects their first emission luminances to obtain second emission luminances in accordance with the selected correction mode, with reference to correction value data stored in correction value tables.

Image display device having a plurality of image correction modes for a plurality of image areas and image display method

Disclosed is a liquid crystal display device () provided with a backlight part () that has a light-emitting diode (light source), and a liquid crystal panel (display part) () that includes a plurality of pixels (P) and displays information using illumination light from the backlight part (). A video generating device (control part) () decides, in a frame in which a gray-scale transition occurs, at least a length of either an OFF period of the light-emitting diode in a first half of the frame or an ON period of the light-emitting diode in a latter half of the frame, based on the time information from the time information generating part (), and outputs an instruction signal to a light source driving part () in accordance with the decided OFF or ON period for driving the light-emitting diode.

Display device

In order to display an image with a high contrast ratio while suppressing power consumed by a multi-display device and to adjust brightness of images displayed on image display devices, the multi-display device includes light emission APL value adjusting means. The light emission APL value adjusting meanssends, to light emission control means, a light emission APL value that has been adjusted, on the basis of light emission APL values calculated by light emission APL value calculating means of image display devicesto, so that total light emission power value of image-display light-emitting meansdoes not exceed an allowable power value and images are displayed at predetermined brightness.

Multi-display device and image display device

The present display device is a display device in which a display unit is provided with a first area (MAR) that displays a first picture and a second area (SAR) that displays a second picture, and is equipped with a first illumination unit that illuminates the first area with light and a second illumination unit that illuminates the second area with light, wherein power supply to the first illumination unit and power supply to the second illumination unit are controlled separately. Thus, it is possible to reduce power consumption.

Display device and television receiver

A backlight unit according to the present invention includes a plurality of LED drivers () to (), an LED controller () that generates a control information group in which lighting control information for selected LED drivers is arranged and a cascade line that connects the LED drivers in cascade. The LED controller () enables the selected LED drivers (), and feeds the control information group to the cascade line, and the enabled LED drivers () perform an operation (acquisition operation) of acquiring the lighting control information on itself among the control information group whereas the LED drivers () that are not enabled do not perform the acquisition operation. According to the present invention, it is possible to reduce the performance of unnecessary operations of the backlight unit. The present invention can be utilized in a liquid crystal display device that uses LEDs as a light source of backlight.

Driver device, backlight unit and image display device

Under management by a main microcomputer, an LED controller performs, along at least two directions within a plane of planar light formed by LEDs arranged in a matrix, brightness correction processing for adjusting the distribution of brightness of the planar light on light source color video signals to convert them into light source color video signals.

Growing community of inventors

Osaka, Japan

Kohji Fujiwara