Patent application number | Description | Published |
20090109387 | LIQUID CRYSTAL OPTICAL DEVICE MANUFACTURING PROCESS - A manufacturing method of a liquid crystal optical device is provided including an alignment film forming step of forming an alignment film containing silicon oxide on a substrate, and a liquid crystal cell forming step of disposing a pair of substrates at least one of which the alignment film has been formed on, opposite to each other interposing a liquid crystal therebetween. In the alignment film forming step, the substrate surface is bombarded with a plasma beam generated by vacuum arc discharge using a cathode containing silicon, where the substrate is disposed on the course of the plasma beam obliquely with an angle. When the plasma beam bombards the substrate surface, plasma ions in the plasma beam have higher kinetic energy or higher flux density than plasma ions in a plasma beam which, if bombarding the substrate obliquely at the angle, form a film having a column structure. | 04-30-2009 |
20090257013 | LIQUID CRYSTAL DEVICE AND METHOD OF MANUFACTURING THE SAME - A liquid crystal device has a pair of substrates, an alignment film formed at least on one of the pair of substrates and liquid crystal showing an orientation defined by the alignment film. The alignment film is a carbon film having a cross-sectional structure inclined relative to the direction of the film thickness by a constant angle. | 10-15-2009 |
20090324845 | METHOD FOR PRODUCING ORIENTATION FILM - A method for producing an orientation film that causes orientation of a liquid crystal includes a process of vapor depositing an inorganic oxide from an oblique direction on a substrate and forming an obliquely vapor-deposited film composed of a plurality of columnar structural bodies tilted at an angle equal to or greater than 20° from a substrate normal and a process of performing ion beam irradiation onto the plurality of columnar structural bodies constituting the obliquely vapor-deposited film. An ion beam irradiation direction in the ion beam irradiation process is in a plane including a vapor deposition direction of the inorganic oxide and the substrate normal and an angle of the ion beam irradiation direction θ | 12-31-2009 |
20100007831 | LIQUID CRYSTAL APPARATUS AND METHOD OF PRODUCING THE SAME - Provided is a liquid crystal apparatus that includes a display region in which electrodes are disposed in a matrix pattern and a non-display region provided at a periphery of the display region and has a liquid crystal disposed in the display region and non-display region, wherein the liquid crystal disposed in the display region is splay-aligned when a voltage is not applied and bend-aligned when the voltage is applied, the liquid crystal disposed in the non-display region is bend-aligned, an alignment film including an inorganic material is provided in at least one of a pair of substrates, and a thickness of the alignment film provided in the display region is smaller than a thickness of the alignment film provided in the non-display region. | 01-14-2010 |
20100181013 | FILM FORMING METHOD AND PRODUCTION PROCESS OF LIQUID CRYSTAL DISPLAY DEVICE - A method of forming a film on a substrate is constituted by a step of depositing a material vaporized from an evaporation source onto a surface of a substrate while inclining the surface of the substrate with respect to a direction from the evaporation source to the substrate, and a step of providing the surface of the substrate with an energy depending on a deposition angle. | 07-22-2010 |
20100219064 | FILM FORMING METHOD - A film forming method is constituted by forming a silicon oxide film on a substrate by causing silicon generated by sputtering with silicon as a target to be incident on the substrate from an oblique direction while supplying oxygen gas onto the substrate. | 09-02-2010 |
20120207973 | OPTICAL MEMBER, METHOD OF MANUFACTURING THE SAME, AND OPTICAL SYSTEM USING THE SAME - Provided are an optical member capable of maintaining a high level of antireflectiveness while preventing fogging under conditions of total reflection, and a method of manufacturing the same. The optical member includes: a substrate; an intermediate layer; and an aluminum oxide layer which are stacked in this order, the aluminum oxide layer having a surface with an irregular structure made of aluminum oxide crystals. The intermediate layer includes multiple columnar structures inclined with respect to a substrate surface, and includes holes between the columnar structures. The method of manufacturing an optical member includes: forming on a substrate surface an intermediate layer including multiple columnar structures by oblique deposition; and forming a film by applying on the intermediate layer a solution containing aluminum compound and subjecting the film to hot water treatment to form on the film surface an aluminum oxide layer having an irregular structure made of aluminum oxide crystals. | 08-16-2012 |
Patent application number | Description | Published |
20090096970 | COMPLEX BIREFRINGENT MEDIUM, POLARIZING AGENT, AND LIQUID CRYSTAL DEVICE - The present invention provides a complex birefringent medium, which has the so-called inverse wavelength dispersibility, that is, a wavelength dispersibility capable of giving an optimum phase difference to a light of a wide visible wavelength range, has a wide viewing angle, can be produced by a convenient method and is excellent in a degree of adjusting freedom of inverse wavelength dispersibility and in mass productivity, a polarizing plate and a liquid crystal display device. The complex birefringent medium of the present invention is a complex birefringent medium having a structure in which a plurality of birefringent layers are laminated, wherein in the complex birefringent medium, a phase difference exhibits inverse wavelength dispersibility as the whole of the complex birefringent medium, and wherein when a principal refractive index having the maximum absolute value of a difference from an average value of three principal refractive indexes at a wavelength λ (nm) is designated as a first principal refractive index n1(λ), a normal line of the birefringent layer and a principal axis corresponding to the first principal refractive index n1(550) of the birefringent layer are in the same plane. | 04-16-2009 |
20090161045 | Method of Compensating Wavelength Dependence of Birefringence of Optical Part, Optical Part, and Display Obtained with these - The present invention is to provide a method of compensating the wavelength dependence of birefringence of an optical part (B) which comprises using a film (a) made of a (co)polymer (α) obtained from at least one olefin selected among 4-methyl-1-pentene, 3-methyl-1-pentene, and 3-methyl-1-butene as a (co)monomer ingredient. | 06-25-2009 |
20100171906 | POLARIZATION CONTROL SYSTEM AND DISPLAY DEVICE - The present invention provides a polarization control system which includes an E-type polarizer and therefore can provide excellent dark state at a wide azimuth and viewing angle. Further, the polarization control system includes a viewing angle control element for controlling a traveling direction of light which has passed through the E-type polarizer and therefore can provide excellent bright state at a wide azimuth and viewing angle. The present invention further provides a display device including such a polarization control system. The polarization control system of the present invention is a polarization control system including a plurality of polarizer, wherein the polarization control system includes an E-type polarizer and a viewing angle control element, and the viewing angle control element controls a traveling direction of light which has passed through the E-type polarizer. | 07-08-2010 |
20110199560 | RETARDATION FILM, POLARIZING FILM, LIQUID CRYSTAL DISPLAY, AND METHOD OF DESIGNING RETARDATION FILM - To provide a retardation film in which the retardation condition is adjusted to achieve a liquid crystal display without coloration over a wide viewing angle range and having a high contrast ratio, and a method of designing the same, as well as a polarizing film and a liquid crystal display using the same. A liquid crystal display comprising a liquid crystal cell and polarizing films in a Cross-Nicol relationship with each other on both sides of the liquid crystal cell; wherein at least one polarizing film includes a retardation film having reverse wavelength dispersion property; and the liquid crystal display further includes a retardation film having a wavelength dispersion property substantially the same as a liquid crystal layer configuring the liquid crystal cell. | 08-18-2011 |
20110310334 | Retardation film, polarizing film, liquid crystal display, and method of designing retardation film - To provide a retardation film in which the retardation condition is adjusted to achieve a liquid crystal display without coloration over a wide viewing angle range and having a high contrast ratio, and a method of designing the same, as well as a polarizing film and a liquid crystal display using the same. A liquid crystal display comprising a liquid crystal cell and polarizing films in a Cross-Nicol relationship with each other on both sides of the liquid crystal cell; wherein at least one polarizing film includes a retardation film having reverse wavelength dispersion property; and the liquid crystal display further includes a retardation film having a wavelength dispersion property substantially the same as a liquid crystal layer configuring the liquid crystal cell. | 12-22-2011 |
20120140152 | RETARDATION FILM, POLARIZING FILM, LIQUID CRYSTAL DISPLAY, AND METHOD OF DESIGNING RETARDATION FILM - To provide a retardation film in which the retardation condition is adjusted to achieve a liquid crystal display without coloration over a wide viewing angle range and having a high contrast ratio, and a method of designing the same, as well as a polarizing film and a liquid crystal display using the same. A liquid crystal display comprising a liquid crystal cell and polarizing films in a Cross-Nicol relationship with each other on both sides of the liquid crystal cell; wherein at least one polarizing film includes a retardation film having reverse wavelength dispersion property; and the liquid crystal display further includes a retardation film having a wavelength dispersion property substantially the same as a liquid crystal layer configuring the liquid crystal cell. | 06-07-2012 |
Patent application number | Description | Published |
20110199561 | Liquid Crystal Display Device - The present invention provides a liquid crystal display device which can ensure visibility and decrease coloring regardless of the direction of the screen, even if the screen is viewed through an optical member having a polarization function, such as polarized sunglasses. In at least one embodiment, a liquid crystal display device includes: a liquid crystal cell; and a first polarizing element disposed at an observation surface side of the liquid crystal cell, and the liquid crystal display device further includes a second polarizing element disposed at the observation surface side of the first polarizing element. It is preferable that the liquid crystal display device further includes a protective plate disposed between the first polarizing element and the second polarizing element. | 08-18-2011 |
20120200811 | LIQUID-CRYSTAL DISPLAY DEVICE - The present invention provides a liquid-crystal display device that can achieve high contrast ratios in a wide range of viewing angles and reduce coloration during black display. The liquid-crystal display device according to the present invention includes a polarizer, a first quarter-wave plate adapted to satisfy nx>ny≧nz, a vertically aligned liquid crystal cell, a second quarter-wave plate provided with substantially the same Nz factor as the first quarter-wave plate and adapted to satisfy nx>ny≧nz, a birefringent layer adapted to satisfy nx08-09-2012 | |
20120206665 | THREE-DIMENSIONAL VIDEO RECOGNITION SYSTEM, VIDEO DISPLAY DEVICE AND ACTIVE SHUTTER GLASSES - The present invention is to provide a three-dimensional video recognition system, a video display device, and active shutter glasses (AS) in which, even when the observer's visual point and the inclination of the observer's face are changed, the reduction in the brightness of the screen can be suppressed, and in which a sufficient shutter effect can be obtained. The present invention provides a three-dimensional video recognition system that is featured by including a display device, a front plate, and AS glasses, and is featured in that each of the AS glasses includes a first λ/4 plate, a first linear polarizing element, a liquid crystal cell, and a second linear polarizing element in this order from the outer surface side, in that the display device includes a third linear polarizing element on an observation surface side of the display device, in that the front plate has a second λ/4 plate, and in that, when an angle formed between a transmission axis of the first linear polarizing element and an in-plane slow axis of the first λ/4 plate is defined as φ1, and when an angle formed between a transmission axis of the third linear polarizing element and an in-plane slow axis of the second λ/4 plate is defined as φ2, expressions of 40°≦φ1≦50° and of 40°≦φ2≦50°, or expressions of 130°≦φ1≦140° and of 130°≦φ2≦140° are satisfied, where φ1 and φ2 are measured as viewed from the side of the λ/4 plate and are measured in the counterclockwise direction taken as the positive direction with reference to the transmission axis of the linear polarizing element. | 08-16-2012 |
20130063670 | ACTIVE SHUTTER GLASSES AND A STEREOSCOPIC IMAGE PROJECTION SYSTEM - The present invention provides active shutter glasses and a stereoscopic image projection system that allow a stereoscopic image of excellent display quality to be viewed. The present invention provides active shutter glasses for a stereoscopic image projection system in which the active shutter glasses include a shutter section for the right eye and a shutter section for the left eye, the shutter section for the right eye and the shutter section for the left eye each include a liquid crystal cell, and when the glasses are worn, viewing angles of the shutter section for the right eye and the shutter section for the left eye each are wider on the right and left sides than on the upper and lower sides. | 03-14-2013 |
20130076997 | ACTIVE SHUTTER GLASSES, PASSIVE GLASSES, AND STEREOSCOPIC IMAGE PROJECTION SYSTEM - The present invention provides active shutter glasses, passive glasses, and a stereoscopic image projection system, with which a viewer wearing polarizing sunglasses can enjoy improved visibility. The active shutter glasses comprises: a shutter for a right eye; and a shutter for a left eye, wherein the shutters for a right eye and for a left eye each have a liquid crystal cell and a linearly polarizing element, the linearly polarizing element is provided in each shutter on an inner side than the liquid crystal cell is, the linearly polarizing element has a transmission axis direction set in the vertical direction when the glasses are worn. | 03-28-2013 |
20130083261 | ACTIVE SHUTTER GLASSES AND A STEREOSCOPIC IMAGE PROJECTION SYSTEM - The present invention provides active shutter glasses including shutters in which orientations of their components are freely determined, and provides a stereoscopic image projection system. The present invention provides active shutter glasses for a stereoscopic image projection system, the active shutter glasses comprising: a right-eye shutter; and a left-eye shutter, wherein the right-eye shutter and the left-eye shutter each include a liquid crystal layer and a linear polarizing element, at least one of the right-eye shutter and the left-eye shutter includes a layer adopted to change a vibration direction of polarized light, the linear polarizing element is provided at the outer side of the liquid crystal layer, and the layer adapted to change a vibration direction of polarized light is provided at the outer side of the linear polarizing element. | 04-04-2013 |
20130114027 | LIQUID CRYSTAL DISPLAY DEVICE - The present invention provides a liquid crystal display device that can achieve sufficient front contrast ratio and front white brightness at the same time. The present invention is a liquid crystal display device including a front polarizing plate, a liquid crystal cell, a back polarizing plate, and an optical element having polarization characteristics, which are arranged in the stated order, wherein the back polarizing plate has a lower contrast than the front polarizing plate, and there is substantially no air layer between the back polarizing plate and the optical element having polarization characteristics. | 05-09-2013 |
20130148053 | LIQUID CRYSTAL DISPLAY PANEL - A liquid crystal display panel is capable of displaying in a normally black mode. The liquid crystal display panel includes: a liquid crystal cell which includes a liquid crystal layer and a pair of substrates; a first polarizing plate provided on a rear surface side of the liquid crystal cell; a second polarizing plate provided on a viewer side of the liquid crystal cell; and an antireflection layer provided on a viewer side of the second polarizing plate, the antireflection layer having a moth-eye structure, wherein a transmission axis of the first polarizing plate is parallel to a vertical direction in a display plane, and a transmission axis of the second polarizing plate is parallel to a horizontal direction in the display plane. According to an embodiment of the present invention, a pale black state in oblique viewing angles is prevented. | 06-13-2013 |
20140152945 | LCD PANEL, ELECTRONIC DEVICE, AND METHOD FOR PRODUCING LCD PANEL - A liquid crystal display panel ( | 06-05-2014 |
20140168581 | LCD PANEL, ELECTRONIC DEVICE, AND METHOD FOR PRODUCING LCD PANEL - A liquid crystal display panel ( | 06-19-2014 |
20140218668 | LIQUID CRYSTAL DISPLAY DEVICE - The present invention provides a liquid crystal display device which enables costs to be reduced, excels in productivity, and enables a high contrast ratio over a wide viewing angle range to be realized. The present invention is a liquid crystal display device including a first polarizer, a second-type (nxny≧nz), a liquid crystal cell, a second λ/4 plate having an Nz coefficient different from the first λ/4, and a second polarizer in this order, wherein an in-plane slow axis of the first λ/4 plate forms generally 45 degrees as to an absorption axis of the first polarizer, an in-plane slow axis of the second λ/4 plate is generally orthogonal to the in-plane slow axis of the first λ/4 plate, an absorption axis of the second polarizer is orthogonal to the absorption axis of the first polarizer, an in-plane fast axis of the second-type birefringent layer is generally orthogonal to the absorption axis of the first polarizer, and black display is performed by aligning liquid crystal molecules within a liquid crystal layer in a manner generally perpendicular to substrate faces. | 08-07-2014 |
20140253853 | LIQUID CRYSTAL DISPLAY - This liquid crystal display device ( | 09-11-2014 |
20140368771 | LIQUID CRYSTAL DISPLAY DEVICE - The present invention provides a liquid crystal display device which can achieve cost reduction, excellent productivity, and a high contrast ratio within a wide viewing angle range. The liquid crystal display device of the present invention includes, in the order set forth, a first polarizer, a first λ/4 plate, a liquid crystal cell, a second λ/4 plate, a third Type-I birefringent layer, a Type-IV birefringent layer, and a second polarizer. An in-plane slow axis of the first λ/4 plate forms an angle of about 45° with an absorption axis of the first polarizer. An in-plane slow axis of the second λ/4 plate is substantially perpendicular to the in-plane slow axis of the first λ/4 plate. An absorption axis of the second polarizer is substantially perpendicular to the absorption axis of the first polarizer. An in-plane slow axis of the third Type-I birefringent layer is substantially parallel with the absorption axis of the second polarizer. The liquid crystal display device displays a black screen by aligning liquid crystal molecules in the liquid crystal layer in the direction substantially vertical to the substrate surface. | 12-18-2014 |
20140368774 | LIQUID-CRYSTAL DISPLAY PANEL AND LIQUID-CRYSTAL DISPLAY DEVICE - A liquid crystal display panel ( | 12-18-2014 |
20150029437 | LIQUID CRYSTAL DISPLAY DEVICE - A liquid crystal display device that can prevent light leakage in black images, has an improved viewing angle of white images, and can avoid an increase in the thickness and additional costs. The liquid crystal display device includes: a collimating backlight unit; and a liquid crystal display panel. The liquid crystal display panel includes: a pair of substrates; and a liquid crystal layer disposed between the substrates, and the liquid crystal layer includes a polymer dispersed liquid crystal. | 01-29-2015 |
20150205157 | LIQUID CRYSTAL DISPLAY DEVICE - The present invention provides a liquid crystal display device that is excellent in production efficiency, achieves a high CR, and significantly improves the viewing angle characteristics (reduces the gamma shift), while suppressing an image blur. The present invention provides a liquid crystal display device at least including: an anisotropic collimating backlight; a lower polarizing plate; a liquid crystal panel; an upper polarizing plate; and an anisotropic diffusion element, the anisotropic collimating backlight having a light distribution anisotropy of a specific angle being combined with the anisotropic diffusion element having a diffusion anisotropy of a specific angle. | 07-23-2015 |
20150296646 | PROTECTIVE PLATE AND DISPLAY DEVICE - The invention provides a protective plate and a display device that can suppress yellowing, reduce a cost, and keep glass from scattering. The invention is a protective plate including a glass substrate; a first layer laminated on a main surface on one side of the glass substrate; a second layer laminated on the first layer; and an antireflective film pasted on a main surface on the other side of the glass substrate, in which the first layer contains polyorganosiloxane (A) and metal oxide particles (B), the second layer contains polyorganosiloxane (C), the antireflective film contains an organic matter, and transmittance of a laminated body of the glass substrate, the first layer, and the second layer is 82% or less at a wavelength of 340 nm. | 10-15-2015 |
Patent application number | Description | Published |
20120285777 | VEHICLE BRAKE APPARATUS - A vehicle brake apparatus capable of preventing abnormal vibration due to thickness variations in a disc rotor includes a motor drive unit configured to control the motor which presses the brake pad against the disc rotor, a brake pressure detection unit for detecting a braking pressure for pressing the brake pad, and a wheel speed sensor for detecting a rotation speed of the disc rotor. If an amount of variation in the detection values detected by the brake pressure detection unit during one rotation of the disc rotor exceeds a variation amount determination threshold value and a detection value variation frequency has a correlation with the rotation speed of the disc rotor and the detection value variation frequency exceeds a variation frequency determination threshold value, the motor drive unit controls the motor in inverted phase to the variation in the detection values. | 11-15-2012 |
20130167716 | MASTER CYLINDER DEVICE - A master cylinder device including: a housing whose front side is closed and which has a separation wall for separating the inside of the housing into a front side chamber and a rear side chamber; a pressurizing piston disposed in the front side chamber so as to define a pressurizing chamber for pressurizing the brake fluid and an input chamber into which a brake fluid from a high pressure source is introduced; an input piston disposed in the rear side chamber and moving forward by an operation force; and a transmission rod which is through the separation wall, whose proximal end portion is fixed in one of the pressurizing and input pistons, and whose distal end portion is apart from the other of the pressurizing and input pistons in a state of no forward movement. | 07-04-2013 |
20130255249 | VEHICLE BRAKE DEVICE - A vehicle brake device is provided with a master cylinder, a master piston slidably arranged in the master cylinder, an input piston slidably arranged in the master cylinder to be separated from the master piston and defining a separation chamber, an input piston moving amount detecting section for detecting the moving amount of the input piston, a master piston moving amount calculating section for calculating the moving amount of the master piston based on the moving amount of the input piston, and a contact inferring section for inferring the contact of the input piston with the master piston based on the moving amount of the input piston and the moving amount of the master piston. | 10-03-2013 |
20140210253 | HYDRAULIC-PRESSURE PRODUCING DEVICE AND HYDRAULIC BRAKE SYSTEM - In a hydraulic brake system including a cylinder device that includes a front chamber and a rear chamber located on front and rear sides of a pressurizing piston, respectively, presence or absence of liquid leakage from a brake line is detected based on a hydraulic pressure in the rear chamber. Where a state in which a subtraction value obtained by subtracting an actual rear hydraulic pressure from a target rear hydraulic pressure is larger than a first malfunction determination threshold value has continued for a time not shorter than a first malfunction determination time, and then an increase of the actual rear hydraulic pressure at a rate not lower than a set rate has caused the subtraction value to become smaller than a return determination threshold value, it is determined that the pressurizing piston has been bottomed due to liquid leakage from the front chamber. | 07-31-2014 |
20140250883 | VEHICLE BRAKE SYSTEM - A vehicle brake system includes a cylinder, a master piston including a pressure applying piston and a projection portion, a servo chamber, a contact/separation determining means determining a separated state and a contact state between the input piston and the master piston, a pilot pressure generating device generating a pilot pressure, a servo pressure generating device, a servo pressure measuring device measuring a servo pressure, and a master pressure estimating means estimating a master pressure from the pilot pressure and a first servo ratio, which is a cross-sectional area ratio between a first pilot chamber and a servo pressure generating chamber, in a case of the separated state, and estimating the master pressure based on the servo pressure, the pilot pressure and a second servo ratio, which is a cross-sectional area ratio between a second pilot chamber and the servo pressure generating chamber, in a case of the contact state. | 09-11-2014 |
20150015061 | BRAKING DEVICE FOR VEHICLE - In a braking device for a vehicle, an operating characteristics setting portion is provided for setting an operating characteristic which is a relationship between the input electric power to the electro-magnetic valve and a pressure difference between a master cylinder side and a wheel cylinder side with respect to the electro-magnetic valve, based on the input electric power at the time when the accumulator pressure detected by the accumulator pressure detecting portion first falls to a value equal to or less than a threshold value accumulator pressure by changing the input electric power towards an opening side of the electro-magnetic valve in response to a time lapsed after a predetermined value of the pilot pressure has been generated by the pilot pressure generating portion by first closing the electro-magnetic valve thereby to suppress the manufacturing cost. | 01-15-2015 |
20150021980 | HYDRAULIC BRAKING SYSTEM - A hydraulic braking system includes: a cylinder device including a pressurizing piston, a rear chamber, and a front pressure chamber on opposite sides of the pressurizing piston; a brake cylinder coupled to the front pressure chamber; a regulator including a control piston, an input chamber provided at a rear of the control piston, and an output chamber coupled to the rear chamber in front of the control piston; and an input-hydraulic-pressure control device including a high-flow-rate supply unit configured, when an operation of the regulator is started, to supply the working fluid to the input chamber at a set flow rate; and a low-flow-rate supply unit configured, when the supply is finished, to supply the working fluid to the input chamber at a flow rate less than the set flow rate. | 01-22-2015 |
20150107240 | BRAKE DEVICE FOR VEHICLE - The brake device for a vehicle generates two master pressures by controlling one single servo pressure to accurately control braking force. The pressure increasing characteristic is set based on the first pressure increasing characteristic obtained from the relationship between the servo pressure and the first master pressure upon increasing the servo pressure and the second pressure increasing characteristic obtained from the servo pressure and the second master pressure. The pressure decreasing characteristic is set based on the first pressure increasing characteristic obtained from the relationship between the servo pressure and the first master pressure upon decreasing the servo pressure and the second pressure decreasing characteristic obtained from the servo pressure and the second master pressure. Thus, the total braking force of the brake device is the sum of a braking force generated by the first master pressure and a braking force generated by the second master piston. | 04-23-2015 |
20150120161 | CYLINDER DEVICE AND HYDRAULIC BRAKE SYSTEM - When a brake switch is switched from OFF to ON, current is applied to a brake ECU, and a command to switch a master cylinder from a second state to a first state is issued after a lapse of preparation time, so that switching-time change suppression control is performed. A reservoir shutoff valve is closed, and duty control is performed on a communication control valve. The duty ratio is set to 1 when a switching-time control duration expires, and the communication control valve is placed in an open position, to establish the first state. Thus, since the communication control valve is duty-controlled during switching from the second state to the first state, change in the hydraulic pressure of an input chamber is suppressed, and change of the operating feeling is suppressed. | 04-30-2015 |
20150151729 | VEHICLE BRAKE SYSTEM - The vehicle brake system includes a cylinder, an output piston disposed in the cylinder, an input piston disposed in the cylinder but separating from the output piston and defining a separation chamber therebetween, a brake pedal connected to the input piston, a reaction force generating device for generating an elastic reaction force, a separation lock valve for controlling the communication between the separation chamber and the reaction force generating device, a fade state judging portion to judge whether the friction brake device is in a fade state or not and a friction braking force control portion for changing the mode to the fade state when the fade state judging portion judged that the friction brake device is in the fade state, wherein a desired friction braking force can be assured even under the brake fade state. | 06-04-2015 |
20150203088 | VEHICLE BRAKING CONTROL DEVICE - The vehicle braking control device adapted to a vehicle brake device having an electromagnetic valve which controls the brake fluid flow between the master cylinder and the wheel cylinders in response to the input electric energy. The vehicle braking control device includes a valve opening electric energy obtaining portion which obtains an input electric energy upon opening of the electromagnetic valve as a valve opening electric energy and an operation characteristic setting portion which sets an operation characteristic based on the valve opening electric energy obtained corresponding to the predetermined pressure differential. The opening valve electric energy obtaining portion changes the input electric energy at a valve closing side or a valve opening side with a change amount per unit of time larger than before valve opening in response to an obtaining of the valve opening electric energy. | 07-23-2015 |