Matsushita Electric Works, Ltd.

Sharp Kabushiki Kaisha Corporation

Sumitomo Electric Industries, Limited

Sumitomo Electric Hardmetal Corp.

Panasonic Corporation

Takashi Kanda

Masahito Ohnishi

Masahiro Naruo

Kazuo Yoshida

Satoru Kukino

Taisuke Higashi

Toshiyuki Fujine

Yusuke Matsuda

Kazuhiro Hori

Katsumi Okamura

Tomoyuki Nakano

Tomoaki Mannami

Makoto Hasegawa

Shigeru Ido

Junichi Kato

Shinichiro Kurihara

Michiyuki Sugino

Yoshinobu Murakami

Naoko Kondoh

Toshiyuki Gotoh

Naoki Onishi

Yuichirou Hirowatari

Yoji Shiraya

Eishi Oda

Shozo Kataoka

Tadao Uetsuki

Naoki Ohnishi

Tomoharu Noutoshi

Koichi Hirata

Masahiro Okui

Koji Saeki

Shingo Ichikawa

Yuusuke Hattori

Takashi Yamasaki

A cutting tool according to an aspect of the present disclosure includes a shank, a joint, and a cutting portion attached through the joint to the shank. The cutting portion includes a core and a surface portion. The surface portion is disposed around a central axis of the cutting portion to cover an outer circumferential surface of the core. The surface portion includes a cutting edge. The cutting edge is disposed on an outer circumferential surface of the surface portion and formed in a helical shape about the central axis. The surface portion is a composite sintered material including a hard phase formed of a plurality of diamond particles and a plurality of cubic boron nitride particles, and a binder phase forming the remainder.

Cutting tool

An image of an HDR signal, in which deterioration in luminance due to adjustment of white balance is suppressed while variations of a color of an image of an SDR signal is suppressed, is displayed. A television () that displays an image is which white balance is adjusted includes a determination unit () that determines whether an image signal is an HDR signal or an SDR signal, and a display control unit () that, in a case where the determination unit determines that the image signal is the HDR signal, changes gain of at least one primary color among primary colors to a value higher than a set value.

Display device, television receiver, display method, and recording medium

A cutting tool includes a shaft portion and a plurality of edge region groups. The ridgeline between the first rake face portion and the first flank face portion constitutes a first cutting edge portion. The ridgeline between the second rake face portion and the second flank face portion constitutes a second cutting edge portion. As seen from the direction perpendicular to a plane tangent to the outer peripheral surface, in a state where the central axis overlaps a first end on the front end side of the first cutting edge portion, the inclination angle of the first cutting edge portion relative to the central axis is larger than the inclination angle of a straight line relative to the central axis, the straight line connecting the first end to a second end on the front end side of the second cutting edge portion.

A cutting tool according to one aspect of the present disclosure includes an attaching portion, a cutting portion having a core portion and a surface portion, and a joint portion. The attaching portion includes a hard component and a hard material. The hard component is at least one selected from the group consisting of TiC, TiCN, W, WC, AlO, and a combination of at least one of CBN and diamond and at least one of W and WC. The hard material includes one or two or more types of iron group elements, and has a Young's modulus of not more than 350 GPa. The core portion includes a cemented carbide material. The surface portion includes PCD or CBN. The cutting portion has a chamfer portion. The surface portion includes a groove, a flank face, and a cutting edge. The cutting edge extends toward the attaching portion.

A luminance indicated by an HDR signal is appropriately displayed. A first image processing unit () converts, in accordance with a maximum luminance level indicated by an HDR signal input to the first image processing unit (), a gradation performance indicated by the HDR signal into a prescribed gradation performance according to a display panel (), and a panel control unit () converts, in accordance with the maximum luminance level indicated by the HDR signal and a maximum luminance displayable by the display panel (), a gradation value indicated by the HDR signal into a gradation value displayable by the display panel ().

Display device, method for controlling display device, control program, and recording medium

When conducting video display with a wide color gamut display based on a video signal conforming to a standard (sRGB standard and the like) having a color reproduction range narrower than that of the wide color gamut display, the video processing circuitcorrects a color in a prescribed correction target color range partly including a red hue reference range as a center part in the color range of an equal hue from achromatic colors having the lowest saturation to red having the highest saturation in an expanded color reproduction range but not including red having the highest saturation in the expanded color reproduction range, so that the hue may change to a hue akin to yellow in the expanded color reproduction range. In so doing, the hue in the red hue reference range changes to red hue in the color reproduction range conforming to the sRBG standard. Furthermore, the hue change ratio into the hue akin to yellow becomes smaller in a color having a long distance from the red hue reference range in the expanded color reproduction range than a color having a distance close thereto. As a result, the wide color gamut display displayable of bright red having a high saturation can be fully utilized, while at the same time solving the problem of hue displacement in displaying red having an intermediate saturation.

Video display device

A lighting device includes a pyroelectric sensor, a shutter and a lighting control unit. The lighting control unit is configured, when the lighting load is turned off, to turn the lighting load on if the pyroelectric sensor detects a change in infrared radiation. The lighting control unit is also configured, when the lighting load is turned on, to turn the lighting load off if a repetition count or time of a lighting retention time reaches a specified count or time, respectively, with no change in infrared radiation detected through the pyroelectric sensor within each lighting retention time per the passage of lighting retention time.

Lighting device, lighting control device and lighting system

A histogram generation portion calculates a prescribed feature value of a pixel and the maximum feature value for the pixel, for each pixel of one frame of an input video signal. Then, the ratio of the feature value of the pixel to the maximum feature value is calculated for each pixel as an index of color brightness, and a histogram generated wherein the numbers of pixels are integrated by index value. An enhancement processing portion applies gain and carries out an enhancement for pixel values wherein the index in the histogram which the histogram generation portion generates is greater than or equal to a prescribed threshold. The feature value is treated as a luminosity (L*) which is defined with CIELAB chroma space. Additionally, the feature value may be data which has the maximum tone value among pixel RGB data, or may be a luminosity value (Y) of the pixel.

In general, when a user views an image displayed on a display apparatus, visual environments, such as ambient brightness, a distance from the user to the display apparatus and so on, may disadvantageously cause the image displayed on the display apparatus to become difficult to view. Moreover, it is complicated and troublesome for the user to enter information of ambient light amount and others when setting a picture quality. An image display apparatus holds both question constituent information related to visual environments and choice information serving as answers to questions constituted by the question constituent information, and further holds a plurality of picture quality control rules suitable for visual environments assumed in accordance with the choice information serving as the answers. When sensing a power-up, the image display apparatus outputs the questions; acquires result information that is choices serving as answers from the user to those questions and that is used to acquire the picture quality control rules; and controls the picture quality in accordance with the picture quality control rules acquired in accordance with the result information.

Image display apparatus

An electronic ballast for a discharge lamps has a dimming control for varying an input DC voltage and an input driving frequency in combination to achieve a lamp dimming in accordance with a dimmer demand. The ballast includes a dimming processor with a memory for storing a table that gives a predetermined relation between the dimming demand and a voltage command designating the input DC voltage as well as a frequency command designating the input driving frequency. A command processing unit is included in the processor to derive the voltage and frequency commands that matches with the dimmer demand so as to vary the light output of the lamp in accordance with the voltage command and the frequency command, respectively derived from the table.

Electronic ballast for a discharge lamp

A power source device includes a control circuit which controls switching elements in full-bridge arrangement so as, in decreasing an output to a load, to substantially equalize ON timing of one of two switching elements at diagonal position to the other of them with ON period of the one switching element shortened, that is, with ON duty ratio of the one switching element decreased. Switching operation of the elements in this event is not made to be in the hard switching operation, and a range in which the output to load can be controlled without increasing any stress or noise is thereby broadened, whereby it is enabled to minimize varying width of switching frequency and to attain a wide range control of the output to load without causing any one of the switching elements to be in the hard switching operation.

Power source device

A discharge lamp lighting device includes a rectifier, a first diode connected at the anode in forward direction to a positive polarity output terminal of the rectifier, a smoothing capacitor connected between the cathode of the first diode and a negative polarity output terminal of the rectifier, a second diode connected at the anode in forward direction to the cathod of the first diode, a pair of switching elements connected in series between the cathode of the second diode and the negative polarity output terminal of the rectifier, a first capacitor connected in parallel to one of the first diode and the rectifier, a second capacitor connected in parallel to the second diode, and a control circuit for controlling ON/OFF operation of these switching elements, and a transformer having a primary winding n,connected between a junction point of the pair of switching elements and one of output terminals of the rectifier and a secondary winding connected to a load circuit including a discharge lamp, and their arrangement can reduce peak factor of currents flowing to the load circuit and any loss occurring at the switching elements.

Discharge lamp lighting device

An electronic ballast for discharge lamps comprises a main resonance circuit for applying a voltage necessary for operating of a discharge lamp having filaments to both ends of the discharge lamp and a filament resonance circuit for supplying a filament current to the filaments, wherein the main resonance circuit and filament resonance circuit have resonance circuits having different resonance characteristics in an output path leading to the discharge lamp and also change their outputs depending on an operating frequency of switching elements. Thereby a filament current and a voltage across the discharge lamp can be set at suitable one of respective operational modes of the discharge lamp according to an operational state of the discharge lamp.

Electronic ballast for discharge lamps

A discharge lamp lighting device includes first voltage source of a high voltage capable of increasing lamp current, the voltage value of which being sequentially variable, and second voltage source of a low voltage capable of decreasing the lamp current, the voltage value of which being sequentially variable, lighting connection of the first and second voltages sources to a discharge lamp being alternately changed over for its stable lighting, whereby the stable lighting of the lamp can be made with any current limiting element minimized and a response to variation in outputs over a wide range as well as any radiant noise can be effectively improved.

Discharge lamp with two voltage levels

A power converter apparatus in which a switched capacitor circuit includes one or more sets of cells connected in series each having a capacitor as a voltage supply source and a bridge circuit for inverting the polarities of the capacitor, the switched capacitor circuit is connected to a load, there is provided a means for parallelly charging the capacitors of the cells with a D.C. voltage source, any number of the cell capacitors are connected in series with any polarity to control supply of an A.C. output to the load. Whereby the power converter apparatus using the switched capacitor circuit can supply A.C. power with less distortion to the load without increasing the withstand voltage of the switching elements and without any need for provision of large inductors or capacitors.

Growing community of inventors

Osaka, Japan

Takashi Kanda