Abstract: A panel drive circuit having an input interface to which an image signal is input, a gamma correction circuit that corrects an image processing signal generated by an image processing circuit performing image processing on the image signal input to the input interface, such that a gamma correction signal thus generated has predetermined gamma characteristics, an unevenness correction circuit that corrects the gamma correction signal generated through the correction by the gamma correction circuit, based on correction data for reducing unevenness of a display panel, and an D/A convertor that has a variable output voltage range, and performs D/A conversion on an unevenness correction signal generated through the correction by the unevenness correction circuit and outputs the signal thus generated to the display panel, and the unevenness correction circuit changes the correction method according to the output voltage range of the D/A convertor.

Abstract: A piezoelectric ceramic composition excellent in all of the electric property Qmax, heat resisting properties and temperature characteristics of oscillation frequencies is provided. The piezoelectric ceramic composition comprises a phase mainly comprising lead zirconate titanate having a perovskite structure and an Al-containing phase. In the piezoelectric ceramic composition, the main component preferably comprises Mn and Nb, and is preferably represented by a composition formula of Pb?[(Mn1/3Nb2/3)xTiyZrz]O3 (wherein 0.97???1.01, 0.04?x?0.16, 0.48?y?0.58, 0.32?z?0.41).

Abstract: A piezoelectric ceramic 1 in a piezoelectric element 20 contains, as a major component, a composition containing one or more complex oxides with metal elements other than lead as constituent elements. At least one of the complex oxides includes an alkali metal and Nb as constituent elements. Also, either or both of the elements Mn and Cu are segregated at the grain boundaries of the composition.

Abstract: A laminated piezoelectric element capable of being sintered at low temperatures and high in piezoelectric properties is provided. The laminated piezoelectric element comprises a plurality of piezoelectric layers each comprising a composite oxide as a main constituent thereof and a plurality of internal electrode layers formed between the piezoelectric layers and containing Ag, wherein the piezoelectric layers are each comprised of a sintered body comprising the composite oxide, as a main constituent thereof, represented by (Pba-bMb) [(Zn1/3Nb2/3)xTiyZrz]O3 with the proviso that 0.96?a?1.03, 0?b?0.1, 0.05?x?0.15, 0.25?y?0.5, 0.35?z?0.6, x+y+z=1, and M represents at least one selected from Sr, Ca and Ba, and Ag in a content of 1.0% by weight or less (not inclusive of 0) in terms of Ag2O in relation to the main constituent.

Abstract: A piezoelectric ceramic composition includes: a composite oxide, as a main component thereof, represented by the composition formula, Pba[(Zn1/3Nb2/3)xTiyZrz]O3, wherein a, x, y and z satisfy the following relations, 0.96?a?1.03, 0.005?x?0.047, 0.42?y?0.53, 0.45?z?0.56, and x+y+z=1, and the following additives in the indicated percentages by mass in relation to the main component, Cu as a first additive, in a content ?, in terms of Cu2O, falling within a range 0<??0.5%; at least one of Li, Co, Ni, Ga and Mg, as a second additive, in a content ?, in terms of carbonate for Li, falling within a range 0<??0.1%, in a content ?1, in terms of oxide for Co, Ni and Ga, falling within a range 0<?1?0.2%, and in a content ?2, in terms of carbonate for Mg, falling within a range 0<?2?0.2%; and at least one of Ta, Nb, W and Sb, as a third additive, in a content ?, in terms of oxide, falling within a range 0<??0.6%.

Abstract: Provided is a piezoelectric ceramic composition capable of being sintered at low temperatures and in a low-oxygen reductive atmosphere and capable of attaining a sufficient displacement even at high voltages of 1 kV/mm or more. The piezoelectric ceramic composition includes: a composite oxide, as a main constituent thereof, represented by the following composition formula; Cu and/or Ag, each as a first additive, Cu being included in a content ?, in terms of Cu2O, falling within a range 0<??0.5% by mass and Ag being included in a content ?, in terms of Ag2O, falling within a range 0<??0.4% by mass, in relation to the main constituent; wherein: composition formula: Pba[(Zn1/3Nb2/3)xTiyZrz]O3, where 0.96?a?1.03, 0.005?x<0.05, 0.42?y?0.53, 0.45?z?0.56, and x+y+z=1.

Abstract: A piezoelectric ceramic composition includes: a composite oxide, as a main component thereof, represented by the composition formula, Pba[(Zn1/3Nb2/3)xTiyZrz]O3, wherein a, x, y and z satisfy the following relations, 0.96?a?1.03, 0.005?x?0.047, 0.42?y?0.53, 0.45?z?0.56, and x+y+z=1; and the following additives in the indicated percentages by mass in relation to the main component, Cu as a first additive, in a content ?, in terms of Cu2O, falling within a range 0<??0.5%; at least one of Dy, Nd, Eu, Gd, Tb, Ho and Er, as a second additive, in a content ?, in terms of oxide, falling within a range 0<??0.3%; and at least one of Ta, Nb, W and Sb, as a third additive, in a content ?, in terms of oxide, falling within a range 0<??0.6%.

Abstract: A piezoelectric ceramic composition excellent in all of the electric property Qmax, heat resisting properties and temperature characteristics of oscillation frequencies is provided. The piezoelectric ceramic composition comprises a phase mainly comprising lead zirconate titanate having a perovskite structure and an Al-containing phase. In the piezoelectric ceramic composition, the main component preferably comprises Mn and Nb, and is preferably represented by a composition formula of Pb?[(Mn1/3Nb2/3)xTiyZrz]O3 (wherein 0.97???1.01, 0.04?x?0.16, 0.48?y?0.58, 0.32?z?0.41).

Abstract: A piezoelectric ceramic composition includes: a composite oxide, as a main component thereof, represented by the composition formula, Pba[(Zn1/3Nb2/3)xTiyZrz]O3, wherein a, x, y and z satisfy the following relations, 0.96?a?1.03, 0.005?x?0.047, 0.42?y?0.53, 0.45?z?0.56, and x+y+z=1; and the following additives in the indicated percentages by mass in relation to the main component, Cu as a first additive, in a content ?, in terms of Cu2O, falling within a range 0<??0.5%; at least one of Dy, Nd, Eu, Gd, Tb, Ho and Er, as a second additive, in a content ?, in terms of oxide, falling within a range 0<??0.3%; and at least one of Ta, Nb, W and Sb, as a third additive, in a content ?, in terms of oxide, falling within a range 0<??0.6%.

Abstract: A piezoelectric ceramic composition includes: a composite oxide, as a main component thereof, represented by the composition formula, Pba[(Zn1/3Nb2/3)xTiyZrz]O3, wherein a, x, y and z satisfy the following relations, 0.96?a?1.03, 0.005?x?0.047, 0.42?y?0.53, 0.45?z?0.56, and x+y+z=1, and the following additives in the indicated percentages by mass in relation to the main component, Cu as a first additive, in a content ?, in terms of Cu2O, falling within a range 0<??0.5%; at least one of Li, Co, Ni, Ga and Mg, as a second additive, in a content ?, in terms of carbonate for Li, falling within a range 0<??0.1%, in a content ?1, in terms of oxide for Co, Ni and Ga, falling within a range 0<?1?0.2%, and in a content ?2, in terms of carbonate for Mg, falling within a range 0<?2?0.2%; and at least one of Ta, Nb, W and Sb, as a third additive, in a content ?, in terms of oxide, falling within a range 0<??0.6%.

Abstract: Provided is a piezoelectric ceramic composition capable of being sintered at low temperatures and in a low-oxygen reductive atmosphere and capable of attaining a sufficient displacement even at high voltages of 1 kV/mm or more. The piezoelectric ceramic composition includes: a composite oxide, as a main constituent thereof, represented by the following composition formula; Cu and/or Ag, each as a first additive, Cu being included in a content ?, in terms of Cu2O, falling within a range 0<??0.5% by mass and Ag being included in a content ?, in terms of Ag2O, falling within a range 0<??0.4% by mass, in relation to the main constituent; wherein: composition formula: Pba[(Zn1/3Nb2/3)xTiyZrz]O3, where 0.96?a?1.03, 0.005?x<0.05, 0.42?y?0.53, 0.45?z?0.56, and x+y+z=1.

Abstract: A laminated piezoelectric element capable of being sintered at low temperatures and high in piezoelectric properties is provided. The laminated piezoelectric element comprises a plurality of piezoelectric layers each comprising a composite oxide as a main constituent thereof and a plurality of internal electrode layers formed between the piezoelectric layers and containing Ag, wherein the piezoelectric layers are each comprised of a sintered body comprising the composite oxide, as a main constituent thereof, represented by (Pba-bMb)[(Zn1/3Nb2/3)xTiyZrz]O3 with the proviso that 0.96?a?1.03, 0?b?0.1, 0.05?x?0.15, 0.25?y?0.5, 0.35?z?0.6, x+y+z=1, and M represents at least one selected from Sr, Ca and Ba, and Ag in a content of 1.0% by weight or less (not inclusive of 0) in terms of Ag2O in relation to the main constituent.

Abstract: A multilayer piezoelectric element has a plurality of piezoelectric layers and a plurality of internal electrodes stacked alternately. The piezoelectric layers contain an oxide containing an alkali metal element and niobium or bismuth. The internal electrodes are formed of a base metal that is preferably copper or copper alloy. The oxide contains niobium and an alkali metal element that preferably includes sodium, potassium and lithium. Otherwise, the oxide contains bismuth and an alkali metal element that preferably includes sodium or potassium.

Abstract: For the purpose of preventing the degradation of the piezoelectric strain properties when Cu is used for internal electrodes, there is provided a piezoelectric ceramic composition including: a composite oxide, as a main constituent thereof, represented by (Pba-bMeb) [(Zn1/3Nb2/3)xTiyZrz]O3 with the proviso that 0.96?a?1.03, 0?b?0.1, 0.05?x?0.15, 0.25?y?0.5, 0.35?z?0.6, and x+y+z=1, and Me represents at least one selected from Sr, Ca and Ba; and at least one selected from Co, Mg, Ni, Cr and Ga as a first additive to the main constituent in a content of 0.5% by mass or less (not inclusive of 0) in terms of oxide, wherein an electrode made of Cu is to be disposed on the piezoelectric ceramic composition.

Abstract: A piezoelectric ceramic composition has as a chief ingredient a composite oxide that has Pb, Ti and Zr as constituent elements. It contains as a first accessory ingredient at least one element selected from the group consisting of Mn, Co, Cr, Fe and Ni in an amount of 0.2 mass % or less excluding 0 mass % in terms of an oxide. As the first accessory ingredient, at least one species selected from the ingredients represented by CuOx, wherein x?0, can be adopted. In this case, the content of the first accessory ingredient is 3.0 mass % or less excluding 0 mass %. The piezoelectric ceramic composition is fired under reducing and firing conditions. The reducing and firing conditions include a firing temperature in the range of 800° C. to 1200° C. and an oxygen partial pressure in the range of 1×10?10 to 1×10?6 atm., for example.

Abstract: A piezoelectric ceramic composition which has a large electromechanical coupling factor and is excellent in heat resisting properties is provided. As additives, Cr, Al and Si are contained together in the piezoelectric ceramic composition including a perovskite compound which contains Pb, Zr and Ti as main components. Preferably, Cr, Al and Si are respectively contained in a content of 0.05 to 0.50 wt % in terms of Cr2O3, in a content of 0.005 to 1.500 wt % in terms of Al2O3, and in a content of 0.005 to 0.100 wt % in terms of SiO2. By simultaneously including these three elements and setting the contents thereof to fall within the above mentioned ranges, the electromechanical coupling factor kt can be 30% or more, and ?Fr, which is the rate of change in resonant frequency Fr between before and after application of an external thermal shock, can be 0.5% or less in absolute value.

Abstract: A method for producing a dielectric ceramic powder which can secure fluidity of the mixture thereof with a resin, even when produced by milling, is provided. A composite dielectric material which secures, the fluidity of the mixture thereof with a resin and is excellent in dielectric properties can be obtained on the basis of the method for producing a dielectric ceramic powder, comprising a first firing step for firing a starting material at a first temperature to obtain a first fired substance; a first milling step for milling the first fired substance to obtain a first milled substance; a second firing step for firing the first milled substance at a second temperature lower than the first temperature to obtain a second fired substance; and a second milling step for milling the second fired substance to obtain a second milled substance.

Abstract: The present invention provides a dielectric ceramic powder which can secure fluidity of the mixture with a resin, even when produced by milling. The dielectric ceramic powder, when controlled to have a specific surface area of 9 m2/cm3 or less and a lattice strain of 0.2 or less can secure fluidity of the mixture with a resin, even when it is produced by milling to have particles of indefinite shape, and give a composite dielectric material of excellent dielectric properties.

Abstract: A current restriction device for alternate circuit with small size, low producing cost and low power loss has been found by using a ferro-electric body with rectangular hysterisis characteristics. Said device is used for instance as a ballast for restricting current in a fluorescent lamp. Said ferro-electric body has main component of B.sub.a T.sub.i O.sub.3, additive of S.sub.r or P.sub.b for substitution of part of B.sub.a and Z.sub.n or S.sub.n for substitution of part of T.sub.i, and a mineralizer of M.sub.n o or C.sub.r2 O.sub.3. The voltage-current characteristics of said ferro-electric body show non-linearity that the impedance ratio (Z.sub.2 /Z.sub.1) of the impedance Z.sub.2 measured with alternate field of 500 volts/mm to the impedance Z.sub.1 measured with alternate field of 5 volts/mm is less than 1/10.