Abstract: Discussed is a display device for improving both transmittance and efficiency of light that is transmitted through a light-emitting unit and a transmissive unit due to a phase difference of ? at an interface between an organic layer and an optical compensation layer of the display device.

Abstract: The present invention provides a device for measuring biological information including a sensor array, wherein the sensor array includes a plurality of sensors that are either sensors for amplifying photoreactivity or sensors forming an island network connected by a plurality of multi-channels and, in the device, the average value of biological information about the skin tissues is measured based on values output from the sensor array, and a method of measuring biological information using the device.

Abstract: Disclosed herein a check valve for a brake system includes a valve seat configured to be form an oil passage thereinside; an opening/closing member configured to open and close the oil passage inside the valve seat; an elastic member having one end elastically supporting the opening/closing member; a valve housing configured to support the other end of the elastic member and coupled to the valve seat; and a plunger that is accommodated in the oil passage and flows according to a flow of fluid generated during operation of the brake system.

Abstract: Discussed is a light-emitting display device, which emits light unchanged by maintaining a cavity of internal light using reverse cavity characteristics through an optical compensation structure, and achieves high luminance characteristics despite a change in a viewing angle, prevents external light from being reflected, and is excellent in terms of efficiency and lifespan by combining the optical compensation structure with a color filter structure. The optical compensation structure includes at least one first layer having a first refractive index and at least one second layer having a second refractive index greater than the first refractive index, the first layer being thicker than the second layer.

Abstract: Discussed is a display device for improving both transmittance and efficiency of light that is transmitted through a light-emitting unit and a transmissive unit due to a phase difference of ? at an interface between an organic layer and an optical compensation layer of the display device.

Abstract: A display device includes: a substrate including: a first region, and a second region, an anode at the first region, an organic layer on the anode at the first region, and on the second region, an electron injection layer on the organic layer at the first region and the second region, the electron injection layer including a first metal, a cathode on the electron injection layer at the first region, the cathode including a second metal having a greater work function than a work function of the first metal, and a capping layer on the cathode at the first region, and on the electron injection layer at the second region.

Abstract: Disclosed herein a check valve for a brake system includes a valve seat configured to be form an oil passage thereinside; an opening/closing member configured to open and close the oil passage inside the valve seat; an elastic member having one end elastically supporting the opening/closing member; a valve housing configured to support the other end of the elastic member and coupled to the valve seat; and a plunger that is accommodated in the oil passage and flows according to a flow of fluid generated during operation of the brake system.

Abstract: Disclosed is a pulsation damping device of a hydraulic brake system including a first damper having a first damping chamber whose volume is varied by the hydraulic pressure of the brake oil, and a second damper having a second damping chamber whose volume is varied by the hydraulic pressure of the brake oil, wherein the volume change rate of the first damping chamber relative to the hydraulic pressure of the brake oil is provided to be larger than the volume change rate of the second damping chamber, and the hydraulic pressure of the corresponding brake oil in the first damping chamber when reaching the maximum variable volume is provided to be smaller than the hydraulic pressure of the corresponding brake oil in the second damping chamber when reaching the maximum variable volume.

Abstract: Disclosed is a pulsation damping device of a hydraulic brake system including a first damper having a first damping chamber whose volume is varied by the hydraulic pressure of the brake oil, and a second damper having a second damping chamber whose volume is varied by the hydraulic pressure of the brake oil, wherein the volume change rate of the first damping chamber relative to the hydraulic pressure of the brake oil is provided to be larger than the volume change rate of the second damping chamber, and the hydraulic pressure of the corresponding brake oil in the first damping chamber when reaching the maximum variable volume is provided to be smaller than the hydraulic pressure of the corresponding brake oil in the second damping chamber when reaching the maximum variable volume.

Abstract: Disclosed herein is a hydraulic brake system. The hydraulic brake system comprises a damping device configured to attenuate pressure pulsation of brake oil discharged according to a driving of a pump, wherein the damping device includes a sleeve fixed to a bore that is connected to a discharge end of the pump and having an opened one side, a damping piston slidably installed inside the sleeve, and an elastic member provided inside the sleeve and configured to elastically support the damping piston, and wherein a slot having a width which is varied is formed at an inner circumferential surface of the sleeve in a direction in which the brake oil flows so that a variable orifice is formed between the damping piston and the sleeve.

Abstract: Disclosed herein is a hydraulic brake system. The hydraulic brake system comprises a damping device configured to attenuate pressure pulsation of brake oil discharged according to a driving of a pump, wherein the damping device includes a sleeve fixed to a bore that is connected to a discharge end of the pump and having an opened one side, a damping piston slidably installed inside the sleeve, and an elastic member provided inside the sleeve and configured to elastically support the damping piston, and wherein a slot having a width which is varied is formed at an inner circumferential surface of the sleeve in a direction in which the brake oil flows so that a variable orifice is formed between the damping piston and the sleeve.

Abstract: An apparatus for collecting wireless is provided. The apparatus includes an antenna and a collection circuit. The antenna generates an alternating current (AC) voltage from a radio wave. The collection circuit generates a direct current (DC) voltage corresponding to the AC voltage, determines whether the DC voltage is lower than a preset value, and changes an internal impedance of the collection circuit if it is determined that the DC voltage is lower than the preset voltage.

Abstract: A low pressure accumulator for an anti-lock brake system of a vehicle. The low pressure accumulator includes a cylinder having one end communicated with a fluid path connected to a valve and a pump and an opposite end formed with an opening, a piston moving back and forth in the cylinder, a spring installed in the cylinder to elastically support the piston, and a plug installed in the opening of the cylinder to support one end of the spring. The plug includes a vent to ventilate air through an inside and an outside of the cylinder.

Abstract: An apparatus for collecting wireless is provided. The apparatus includes an antenna and a collection circuit. The antenna generates an alternating current (AC) voltage from a radio wave. The collection circuit generates a direct current (DC) voltage corresponding to the AC voltage, determines whether the DC voltage is lower than a preset value, and changes an internal impedance of the collection circuit if it is determined that the DC voltage is lower than the preset voltage.

Abstract: Disclosed is a low pressure accumulator for an anti-lock brake system of a vehicle. The low pressure accumulator includes a cylinder having one end communicated with a fluid path connected to a valve and a pump and an opposite end formed with an opening, a piston moving back and forth in the cylinder, a spring installed in the cylinder to elastically support the piston, and a plug installed in the opening of the cylinder to support one end of the spring. The plug includes a vent to ventilate air through an inside and an outside of the cylinder.

Abstract: Disclosed is a pump unit for an electronic control brake system. The pump unit includes first to third pumps arranged on a first plane at angular positions of 120°, 60°, and 180°, respectively, and fourth to sixth pumps arranged on a second plane spaced apart from the first plane in parallel to the first plane. The fourth to sixth pumps are arranged at angular positions 60°, 120°, and 180°, respectively, so that the hydraulic pressure pulsation is reduced during the pump operation and a brake oil pressure is rapidly formed.