Abstract: A system for generating a video control signal to process a video signal associated with a video composite signal. The video composite signal has horizontal and vertical driving signal, each having one or more pulses. The system comprises a counter for counting the number of the pulses of respective one or more of the horizontal and vertical driving signals, and a flip-flop, which is coupled to the counter, for generating a blanking signal based on the result of the counting.

Abstract: A variable magnification viewfinder comprises, from the object side, an objective lens group of an overall positive power, including a first lens unit of a negative refractive power, a second lens unit of a positive refractive power, a third lens unit of a positive refractive power and a fourth lens unit of a positive refractive power, wherein the objective lens group forms an actual image of an object, a reverse group for reversing an image formed through the objective lens group, and an eyepiece lens group for observing an image reversed through the reverse group, and where 2.4<L/fw<3.7, wherein, fw represents the focal length of the objective lens group at a wide angle position, L represents the distance between a closest surface of the objective lens group to the object and the actual image of the object formed by the objective lens group.

Abstract: A real-image variable magnification viewfinder includes, from the object side, an objective lens group of an overall positive power, including a first lens unit of a positive refractive power, a second lens unit of a negative refractive power, a third lens unit of a positive refractive power, and a fourth lens unit of a positive refractive power. The objective lens group forms an actual image of an object. The viewfinder also includes a reverse lens group for reversing an image formed by the objective lens group, and an eyepiece lens group for observing an image reversed by the reverse lens group.

Abstract: A component mounting apparatus includes a first pair of clamping members installed to face each other and to move toward and away from a hollow rod, and a second pair of clamping members installed to face each other at a predetermined angle with respect to the first clamping members and to move toward and away from the hollow rod. The first clamping members are driven by a first actuator and the second clamping members are driven by a second actuator. Thus, components of various configurations including any rectangle can be easily clamped. Another component mounting apparatus includes a lightweight component positioning unit. A component is picked up by a component pick-up unit protruding from the component positioning unit whose width becomes larger, positioned, and held by the component positioning unit. Thus, damage of the component can be prevented and component pick-up and mounting operations can be rapidly performed.

Abstract: The present invention provides a pattern formation method comprising the steps of forming a plating film of a metal insoluble in an etching solution on a substrate, forming a photoresist film on the plating film, forming a photoresist pattern by exposing the photoresist film to light using a predetermined pattern of photo mask and then developing, forming a plating film pattern by using the photoresist pattern as a mask, completely removing the photoresist pattern, etching the substrate by using the plating film pattern as an etching mask, and completely removing the plating film pattern. The present invention has an advantage in that an accurate and fine processing of the lead frame is possible since a plating film pattern is substituted for a photoresist pattern, as an etching mask in the substrate etching step.

Abstract: A semiconductor lead frame having an improved structure formed of plated layers is provided. The semiconductor lead frame has the structure of multi-plated layers in which a Ni plated layer, a Pd strike plated layer, and a Pd--X alloy plated layer are deposited on a substrate in the described order. In such a multi-plated layer structure, the Pd strike plated layer covers the porous surface of the Ni plated layer and decreases the surface roughness. Since the thickness of the outer Pd--X alloy plated layer can be maintained uniform due to the Pd strike plated layer, corrosion durability and bonding characteristics are enhanced, thus minimizing the generation and progress of cracks.

Abstract: A system and a method for mounting electronic components on a printed circuit board are disclosed. The system comprises a component supporting stage, a board bearing stage, mounting heads, vacuum bits, pressure sensors, device for computing thresholds, and device for determining the status of the pick-up operation of the vacuum bits. The method comprises the steps of detecting a first pressure value of a vacuum bit at which the vacuum bit is open and a second pressure value of the vacuum bit at which the vacuum bit is closed, computing a threshold value in response to the detected first and second pressure values, and moving the mounting heads to the board bearing stage in response to a determination that the pressure value of the vacuum bit at which the component is picked up exceeds the threshold values.

Abstract: A camera for shortening a strobe charge time comprising the present invention discloses a camera and a method for shortening the charge time of a strobe by mounting a generator around or within a motor and applying electric energy produced from the turning of the motor to the strobe. The camera includes a switching circuit, an automatic distance measuring circuit, a brightness measuring circuit, a microcontroller, a motor driving circuit, a motor section, a generating circuit, a strobe charged by a charge signal produced from the microcontroller or by the electrical energy produced from the generating circuit, and a shutter driving circuit. The switching circuit includes a first step release switch, a second step release switch, a photographic mode switch, and a back-cover switch. The motor section includes one or more motor driven by a film winding signal or a film rewinding signal produced from the motor driving circuit, and the generating circuit likewise includes one or more generator.

Abstract: A semiconductor lead frame in which a semiconductor chip is mounted using an insulating adhesive film. The semiconductor lead frame includes an inner lead and a plating layer. The inner lead has a plating groove formed therein at an end portion of a surface opposite a surface to which the insulating adhesive film is attached. The plating layer rests on the plating groove such that an upper surface of the plating layer and the opposite surface of the inner lead are flush. Since the upper surfaces of the plating layer and the inner lead are flush, a pressing force by a heater is uniformly transmitted to a semiconductor chip, thereby improving adhesion reliability of the semiconductor chip.

Abstract: A video presenter for radiating light toward an object, such as a film negative or transparency, includes an illuminating unit detachably installed within a pallet supporting the object for photographing. To obtain a superior-quality image by uniformly passing light through the object, a recessed portion is formed in the pallet and the illuminating unit is detachably inserted therein. The detachable nature of the illuminating portion permits it to be used apart from the video presenter for other purposes. Further, the illuminating unit may include a diffusion panel for diffusing light emitted by plural light sources; the diffused light being directed upwardly to illuminate the object.

Abstract: A digital signal delay circuit includes a first pair of counters for setting a starting point of a digital output signal by counting an adjustably set number of clock pulses corresponding to an intended time delay from a starting point of a digital input signal. The circuit further includes a second pair of counters for setting an ending point of the digital output signal by counting an adjustably set number of clock pulses corresponding to an intended output pulse width from an ending point of the digital input signal. The state of the digital output signal is only determined by the state of the output signal of the last counter in the first pair of counters. The output signal from the last counter in the first pair of counters controls a count starting point of the first counter in the second pair of counters. The output signal from the second pair of counters controls an initializing point on which the state of the output signal from the last counter in the first pair of counters is inverted.

Abstract: The conversion system for a camera employs a conversion lever disposed at the outer side of a camera body to select a given photographic mode without need to open the camera. The conversion lever is used to shift a cam plate which is located within the camera body in order to effect vertical movement of two panorama curtains within the camera body. The cam plate may be moved into one of three positions, namely a normal photographic mode position, a first photographic mode position and a second photographic mode position. A first operating lever is actuated by the cam plate to move one panorama curtain vertically while movement of the first panorama curtain causes movement of the second panorama curtain via a second operating lever.

Abstract: A device and a method for sensing brightness, by which a sensing area for measuring the brightness of an object is varied. The variation of the brightness sensing unit is in response to the variation of an image angle that varies according to the zoom position of the lens of a zoom camera. In this manner, photographs with optimum exposure can be obtained. The device comprises a zoom position sensing unit, a brightness sensing unit, and a control unit.

Abstract: A multi-layered circuit substrate and a manufacturing method thereof comprising the steps of coating the upper surface of a substrate with a photosensitive insulating layer; exposing and developing the photosensitive insulating layer to form a photosensitive insulating layer of predetermined pattern and pattern spaces; forming a conductive layer by printing a conductive ink in the pattern spaces; and forming a plurality of layers by performing the previous steps, each layer comprising a photosensitive insulating layer of predetermined pattern and pattern spaces and a conductive layer formed in the pattern spaces.

Abstract: The present invention relates generally to a control device for controlling the position and slope of a target, and more particularly, to a control device to keep the position and slope of a target, such as a wafer or a substrate, within limits of a focus-depth of a projection lens.The control device comprises a light source that emits light to be transmitted to and reflected from the target; a first mask through which the light emitted from the light source passes, and on which an asymmetric pattern is recorded; first and second photoreceivers for detecting the light reflected from the target; and control device for adjusting the position and slope of the target based on signals received from the photoreceiver.

Abstract: A method for making a substrate for a semiconductor package comprising forming a conductive layer having a desired circuit pattern on the substrate; curing the conductive layer; and coining the cured conductive layer to make its surface uniform. The cured conductive layer may be plated with Ni, and subsequently with Au, and shaped to form a Au-plated board.

Abstract: A photographic lens system, comprising, from an object side, a first lens group having a positive refractive power, and a second lens group having a positive refractive power, wherein the first and the second lens groups comprise at least one cylindrical lens and the photographic lens system satisfies the condition of 1.0<f.sub.1 /f.sub.2 <1.2, where f.sub.1 represents a focal length in the Y direction, and f.sub.2 represents a focal length in the Z direction.The photographic lens system enables an image to be formed at the same position by making the horizontal magnification different from the vertical magnification due to the back focal length in the Y direction being different from that in the Z direction while equating the focal point lengths in the Y and Z directions. The photographic lens system can be used in a high quality camera having a relatively large aperture ratio and a good image forming efficiency.

Abstract: A detector for detecting the maximum/minimum diaphragm adjustment value of an exchange lens of a camera includes a bar code, in which the maximum/minimum diaphragm adjustment value of an exchange lens is printed in a binary code, formed on the lens and a bar code reader on the camera for reading and decoding the bar code. The bar code reader outputs an electric pulse signal corresponding to the bar code by radiating a fixed scanning line at the bar code.