Patent application number | Description | Published |
20090233100 | Light Diffusing Polycarbonate Sheet - A light diffusing polycarbonate resin sheet is obtained by coextruding a polycarbonate resin composition containing an antistatic agent as a surface layer on at least one side of a base material comprising a polycarbonate resin composition containing a light diffusing agent, wherein the antistatic agent of said surface layer is a specified organic sulfonic acid phosphonium salt and the concentration of said antistatic agent exceeds 2.0 parts by weight but is 10 parts by weight or less per 100 parts by weight of a polycarbonate resin used in the surface layer, and, when desired, polycaprolactone is present in 0.01 to 15 parts by weight per 100 parts by weight of the polycarbonate resin used in the surface layer. The light diffusing polycarbonate resin sheet of the present invention has excellent antistatic properties, light diffusion properties and luminance without adversely affecting the clarity of the polycarbonate resin and is ideal for use in light diffusing sheets particularly in those used in liquid crystal display device back lighting. | 09-17-2009 |
20090258170 | FLAME RETARDANT AND LIGHT DIFFUSING POLYCARBONATE RESIN COMPOSITION AND LIGHT DIFFUSING SHEET THEREOF - A flame retardant and light diffusing polycarbonate resin composition comprising 100 parts by weight of a polycarbonate resin (A), 0.1 to 8 parts by weight of a light diffusing agent (B) and 0.01 to 1.5 parts by weight of a silicone compound (C), wherein the main chain of the silicone compound (C) is branched and the silicone compound (C) contains organic functional groups and the presence of aromatic groups is essential as the organic functional groups but the presence of hydrocarbon groups other than aromatic groups is optional as the organic functional groups other than terminal groups and a light diffusing sheet molded thereof. The light diffusing sheet obtained by molding a polycarbonate resin composition of the present invention with flame retardance and light diffusing properties has excellent flame retardance without adversely affecting the light diffusing properties and luminance of the light diffusing polycarbonate resin and is ideal for use in all applications requiring a high degree of optical performance. | 10-15-2009 |
20090326120 | Flame retardant and light diffusing polycarbonate resin composition and light diffusing sheet thereof - A flame retardant and light diffusing polycarbonate resin composition comprising 100 parts by weight of a polycarbonate resin (A), 0.1 to 6 parts by weight of a light diffusing agent (B) with an average particle diameter of 1 to 10 μm, 0.03 to 1 part by weight of a light storing agent (C) with an average particle diameter of 1 to 20 μm and 0.03 to 1.5 parts by weight of a silicone compound (D) wherein the silicone compound (D) has a branched main chain structure and contains organic functional groups and the presence of aromatic groups is essential as the organic functional groups but the presence of hydrocarbon groups other than aromatic groups is optional as the organic functional groups other than terminal groups. The light diffusing sheet obtained by molding a polycarbonate resin composition of this invention can be used ideally in all applications where excellent flame retardance and a high degree of optical performance are needed such as in parts materials covering a light source such as, for example, in light diffusing sheets for direct backlighting units and edge lighting units for liquid crystal televisions, globe boxes for lighting devices and switches for various devices. | 12-31-2009 |
20100148136 | Light Diffusing Thermoplastic Resin Composition and Light Diffusion Sheet Thereof - The present invention provides a light diffusing thermoplastic resin composition comprising polycaprolactone, specific silicone rubber particles, and, when desired, a fluorescent brightening agent, an antioxidant and/or an ultraviolet light absorber. A light diffusion sheet can be obtained by molding the light diffusing thermoplastic resin composition, which has superior light diffusion properties, luminance, mechanical strength, thermal stability and light resistance. | 06-17-2010 |
Patent application number | Description | Published |
20100181978 | Booster circuit and PWM signal generator - A PWM signal generator used for a booster circuit including a voltage-boosting coil that is connected to a main power supply, and a driving transistor that drives the voltage-boosting coil to generate boosted voltage, the PWM signal generator including a first amplifier that generates intermediate voltage based on a voltage value of the boosted voltage, a triangular wave generator that generates a triangular wave signal, a comparator that compares a voltage level of the intermediate voltage with a voltage level of the triangle wave signal to generate an intermediate PWM signal, a driver that generates a PWM signal supplied to the driving transistor based on the intermediate PWM signal, and a second amplifier that generates a driver power supply supplied to the driver based on magnitude of a voltage value of the intermediate voltage. | 07-22-2010 |
20100277226 | Boost circuit and liquid crystal display device using boost circuit - A charge pump circuit has boost capacitors and a charge switch supplying supply voltage to the boost capacitors, and a step-up ratio thereof is variable by switching a connection relationship of the boost capacitors. A control circuit unit controls switching of the step-up ratio and selects first operation or second operation depending on a sum-based voltage corresponding to a sum of the supply voltage and a under-charge boost capacitor voltage. The first operation is to turn ON/OFF the charge switch in synchronization with a boost clock signal, while the second operation is to turn OFF it irrespective of the boost clock signal. A value of the sum-based voltage with which the first and second operations are switched is a reference value. When switching the step-up ratio from a first ratio to a second ratio lower than the first ratio, the control circuit unit switches the reference value from a first value corresponding to the first ratio to a second value corresponding to the second ratio, and then switches the connection relationship. | 11-04-2010 |
20110084675 | BOOSTER CIRCUIT - A booster circuit according to the present invention includes a booster that connects a boosting condenser that is charged and a direct-current power source in series through a switch for a boosting operation in order to generate a boosted voltage and charges a smoothing condenser with the boosted voltage through a switch for an outputting operation. The switch for the boosting operation is composed of a plurality of switches connected in parallel and at least one of the plurality of switches can be controlled independently. | 04-14-2011 |
20110141092 | DIFFERENTIAL AMPLIFIER AND CONTROL METHOD FOR THE SAME - A liquid crystal display apparatus includes a signal generating circuit configured to generate a first control signal and a second control signal; and a differential amplifier. The differential amplifier includes: a first differential pair of transistors configured to receive a differential input signal; a first constant current source connected with said first differential pair of transistors; and a first switch connected in parallel with said first constant current source and configured to increase current which flows through said first differential pair of transistors, in response to said first control signal which is active for a first time period in a level transition of said differential input signal. | 06-16-2011 |
20110199157 | DIFFERENTIAL AMPLIFIER, METHOD FOR INVERTING OUTPUT POLARITY OF THE SAME, AND SOURCE DRIVER - A differential amplifier includes: an output amplifier circuit; a bias circuit; and a pulse applying circuit. The output amplifier circuit receives a positive gradation voltage and a negative gradation voltage alternately by an input stage circuit and supplies a drive voltage generated based on the gradation voltage to a display panel. The bias circuit generates a bias voltage in synchronization with a strobe signal which is a trigger for a polarity inverting operation of the gradation voltage and applies the bias voltage to a constant current source controlling a current of the input stage circuit. The pulse applying circuit generates a pulse voltage having a voltage level higher than a voltage level of the bias voltage and couples the pulse voltage to the bias voltage. | 08-18-2011 |
20120019502 | SOURCE DRIVER FOR A LIQUID CRYSTAL DISPLAY DEVICE AND LIQUID CRYSTAL DISPLAY DEVICE USING THE SAME - In a source driver for a liquid crystal display device, a slew rate is increased while an increase in power consumption is suppressed. The source driver for a liquid crystal display device includes multiple output amplifiers that drive multiple data lines in response to an input signal, and a bias control circuit having a dummy amplifier consistent with an electric characteristic of the output amplifiers. The bias control circuit controls high bias periods of the output amplifiers on the basis of an output transition period of the dummy amplifier when the dummy amplifier receives voltages of a γ resistor circuit, which are input to the output amplifiers. | 01-26-2012 |
20120092322 | LIQUID CRYSTAL DISPLAY DRIVE CIRCUIT AND METHOD FOR DRIVING SAME - A liquid crystal display drive circuit includes first and second buffer circuits, first to fourth switches, and a control signal generation circuit (CSGC). The first buffer circuit drives a first or second data line, and the second buffer circuit drives the second or first data line. Closing the first switch makes the first buffer circuit drive the first data line responsive to a first control signal. Closing the second switch makes the second buffer circuit drive the second data line. Closing the third switch makes the first buffer circuit drive the second data line in responsive to a second control signal. Closing the fourth switch is makes the second buffer circuit drive the first data line. The CSGC generates the first-third control signals for causing respective outputs of the first buffer circuit, and the second buffer circuit to be in high impedance state on the basis of a strobe signal. | 04-19-2012 |
20130002644 | DIFFERENTIAL AMPLIFIER, METHOD FOR INVERTING OUTPUT POLARITY OF THE SAME, AND SOURCE DRIVER - A differential amplifier includes: an output amplifier circuit; a bias circuit; and a pulse applying circuit. The output amplifier circuit receives a positive gradation voltage and a negative gradation voltage alternately by an input stage circuit and supplies a drive voltage generated based on the gradation voltage to a display panel. The bias circuit generates a bias voltage in synchronization with a strobe signal which is a trigger for a polarity inverting operation of the gradation voltage and applies the bias voltage to a constant current source controlling a current of the input stage circuit. The pulse applying circuit generates a pulse voltage having a voltage level higher than a voltage level of the bias voltage and couples the pulse voltage to the bias voltage. | 01-03-2013 |
20130335050 | SWITCHING REGULATOR CONTROL CIRCUIT - In the related art, there is a problem that the condition of a load is monitored in an indirect manner so that an efficiency enhancing effect is not obtained. A switching regulator control circuit includes an oscillator for generating a carrier signal and a transistor drive circuit for driving a switching transistor and a synchronous rectification transistor based on a PWM signal generated based on the carrier signal. The oscillator switches the frequency of the carrier signal based on the direction of a source-drain voltage of the synchronous rectification transistor. | 12-19-2013 |
20150317943 | DIFFERENTIAL AMPLIFIER AND CONTROL METHOD FOR THE SAME - A liquid crystal display apparatus includes a signal generating circuit configured to generate a first control signal and a second control signal; and a differential amplifier. The differential amplifier includes: a first differential pair of transistors configured to receive a differential input signal; a first constant current source connected with said first differential pair of transistors; and a first switch connected in parallel with said first constant current source and configured to increase current which flows through said first differential pair of transistors, in response to said first control signal which is active for a first time period in a level transition of said differential input signal. | 11-05-2015 |
Patent application number | Description | Published |
20100028541 | SURFACE TREATMENT LIQUID FOR ZINC-BASED METAL MATERIAL AND METHOD FOR SURFACE-TREATING ZINC-BASED METAL MATERIAL - Disclosed is a surface treatment liquid containing no chromium compound, which is capable of imparting a zinc-based material with adequate corrosion resistance without coating, namely adequate bare corrosion resistance. Specifically disclosed is a surface treatment liquid for zinc-based metal materials, which contains the following component (A) and component (B): (A) at least one metal element selected from the group consisting of Ti, Zr and Hf; and (B) at least one compound selected from the group consisting of allylamino compounds, imino compounds, amino polysaccharides, amino-modified phenols and derivatives of them. The total concentration of the metal elements of the component (A) is 500-2000 mg/L, and the total concentration of the compounds of the component (B) is 300-3000 mg/L. | 02-04-2010 |
20110311838 | COMPOSITION FOR TREATING SURFACE OF METAL, METHOD FOR TREATING SURFACE OF METAL USING THE COMPOSITION, AND COATING FILM FOR TREATING SURFACE OF METAL UTILIZING THE COMPOSITION AND THE METHOD - A composition for metal surface treatment capable of forming films and imparting excellent corrosion resistance in relation to metallic materials, in particular, metal formations having complex shapes through a single dipping step. A composition for metal surface treatment contains 5 to 30% by weight of a nonionic and/or cationic water-based resin, 100 to 1,000 ppm of trivalent Bi ions and an aminopolycarboxylic acid at 0.5 to 10 times in molar concentration based on the Bi ions. | 12-22-2011 |
20140311914 | COMPOSITION FOR TREATING SURFACE OF METAL, METHOD FOR TREATING SURFACE OF METAL USING THE COMPOSITION, AND COATING FILM FOR TREATING SURFACE OF METAL UTILIZING THE COMPOSITION AND THE METHOD - A process for metal surface treatment includes dipping a metallic material with a cleaned surface into a composition containing 5 to 30% by weight of a nonionic and/or cationic water-based resin, 100 to 1,000 ppm of trivalent Bi ions, and an aminopolycarboxylic acid at 0.5 to 10 times in molar concentration based on the Bi ions, then performing a first electrolysis using the metallic material as a cathode at a voltage of 0 to 15 V for 10 to 120 seconds, and performing a second electrolysis at a voltage of 50 to 300 V for 30 to 300 seconds, in which the performing the first electrolysis is prior to the performing the second electrolysis, and thereafter rising with water, and baking to deposit a film over the metallic material. | 10-23-2014 |
20150299864 | METAL SURFACE TREATMENT LIQUID, SURFACE TREATMENT METHOD FOR METAL BASES, AND METAL BASE OBTAINED BY SURFACE TREATMENT METHOD FOR METAL BASES - A metal surface treatment liquid for use in forming a composite coating film containing a Bi element and a Group 4 element on a metal base. The metal surface treatment liquid is a fluorine-free aqueous treatment liquid containing (A) a Bi element source, (B) a multimer of at least one Group 4 element selected from the group consisting of Zr, Ti and Hf elements, and (C) one or more aminopolycarboxylic acids or a salt thereof. | 10-22-2015 |
Patent application number | Description | Published |
20110073484 | METAL MATERIAL WITH A BISMUTH FILM ATTACHED AND METHOD FOR PRODUCING SAME, SURFACE TREATMENT LIQUID USED IN SAID METHOD, AND CATIONIC ELECTRODEPOSITION COATED METAL MATERIAL AND METHOD FOR PRODUCING SAME - This invention provides a metal material with a bismuth coating being enables the subsequent coating to be accomplished at a high throwing power, and has excellent corrosion resistance, coating adhesion, and, being able to be produced with reduced damage to the environment, the metal material having a surface and a bismuth-containing layer deposited on at least a part of the surface of the metal material, wherein a percentage of bismuth atoms in number of atoms in the surface layer of the metal material with a bismuth coating is at least 10%. | 03-31-2011 |
20110076505 | METALLIC MATERIAL AND METHOD OF MANUFACTURING THE SAME - A metallic material is provided that is superior to an iron-based metallic material in all of adhesion, heat resistance, electrical conductivity, and corrosion resistance, and a method of manufacturing the metallic material is also provided. A metallic material is provided that includes an iron-based metallic material and an oxide layer formed on the surface of the iron-based metallic material. The oxide layer includes Fe and at least one kind of metal (A) selected from a group consisting of Zr, Ti, and Hf. There is also provided a method of manufacturing the metallic material. | 03-31-2011 |
20110094630 | CHEMICAL CONVERSION SOLUTION FOR METAL STRUCTURE AND SURFACE TREATING METHOD - The present invention provides a chemical conversion solution and the surface treating method for realizing high corrosion resistance and high coating adhesion of the metal surface, as well as high throwing power during electrodeposition, and generating no sludge. | 04-28-2011 |
20150013566 | METAL MATERIAL WITH A BISMUTH FILM ATTACHED AND METHOD FOR PRODUCING SAME, SURFACE TREATMENT LIQUID USED IN SAID METHOD, AND CATIONIC ELECTRODEPOSITION COATED METAL MATERIAL AND METHOD FOR PRODUCING SAME - A metal material is provided with a bismuth coating which enables the subsequent coating to be accomplished at a high throwing power, and has excellent corrosion resistance, coating adhesion and is able to be produced with reduced damage to the environment. The metal material has a surface and a bismuth-containing layer deposited on at least a part of the surface of the metal material, wherein the percentage of bismuth atoms in the number of atoms in the surface layer of the metal material with a bismuth coating is at least 10%. | 01-15-2015 |