摘要:
A device usable with a first object and a second object at least one of which is provided with a diffraction grating, for detecting the position of the second object relative to the first object, is disclosed. The device includes a light source for projecting a position detecting beam upon the first object; a beam detecting portion for receiving the position detecting beam after it is directed from the first object and being incident on the second object, the beam detecting portion receiving the position detecting beam to detect the position of the second object relative to the first object; wherein at least one diffraction grating is disposed in the path of the position detecting beam to be received by the beam detecting portion, which diffraction grating is effective to diffract the position detecting beam at least twice and wherein the beam detecting portion is disposed at a site effective not to receive unwanted diffraction light produced from the or at least one diffraction grating.
摘要:
A device for detecting the positional relationship between first and second objects in a predetermined direction includes a light source for emitting light in a direction to the first or second object, and a first detecting portion for detecting the position of incidence of a first light deflected by the first and second objects, wherein the position of incidence of the first light upon the first detecting portion is changeable with a change in the positional relationship between the first and second objects in the predetermined direction. A second detecting portion detects the position of incidence of a second light deflected by at least one of the first and second objects, wherein the state of the position of incidence of the second light resulting from a change in the positional relationship between the first and second objects, in the predetermined direction differs from that of the first light. On the basis of the detection by the first and second detecting portions, the positional relationship between the first and second objects is detected without being affected by an inclination thereof.
摘要:
A device for detecting a relative positional relationship between first and second objects is disclosed. The device includes light source for projecting light to the first and second objects; photodetecting system for detecting light from one of the first and second objects illuminated by the light source system, the photodetecting system having a light receiving surface and producing a signal corresponding to the light intensity at each point on the light receiving surface; and position detecting system for detecting the relative position of the first and second objects, on the basis of signals from the photodetecting system, wherein the position detecting system is arranged to adjust signals corresponding to different points on the light receiving surface of the photodetecting system, by using different weight coefficients and to detect the relative position of the first and second objects on the basis of the adjusted signals.
摘要:
A device, usable with first and second opposed objects each having at least one diffraction grating, for detecting a positional relationship between those objects in a direction perpendicular to the direction in which they are opposed, is disclosed. The device includes a light source for projecting light to a diffraction grating of one of the first and second objects and a first detecting system for detecting, in a first plane, first light diffracted by diffraction gratings of the first and second objects. The position of incidence of the first light on the first plane is changeable with a change in the relative position of the first and second objects in the perpendicular direction. A second detecting system detects, in a second plane, second light diffracted by a diffraction grating of the first and second objects, wherein a change in the position of incidence of the second light on the second plane due to a change in the relative position of the first and second objects in the perpendicular direction is different from the change in the position of incidence of the first light. A position detecting system detects the relative position of the first and second objects, in accordance with the detection by the first and second detecting systems; wherein the first and second lights are those lights having been diffracted, at different orders, by the same diffraction grating of one of the first and second objects.
摘要:
A position detecting system for detecting the relative position of two objects is disclosed wherein: light is projected to the two objects so that the light from the two objects is received by a position detector; to an output signal from the detector is applied a weight coefficient corresponding to the position to determine a gravity center of the light incident; a region of the position detector is set on the basis of the determination; the gravity center of the light incident is determined again on the basis of the set region; and the relative position of the two objects is determined on the basis of the second determination.
摘要:
A flat display apparatus has a flat display panel; a frame that is installed on a rear face side of the display panel; a cover that covers at least a rear face side of the frame; and a high-voltage power supply that applies high voltage to the display panel. The high-voltage power supply has a plurality of cases, each of which encloses one or more transformers and rectifier circuits, and obtains high voltage by connecting the plurality of cases in series, and the plurality of cases are arranged in a space created between the frame and the cover so as to be disposed on a plane in parallel with a screen of the display panel.
摘要:
A difference between the black level potential VB and the white level potential VW in the effective bright environment is smaller than a difference between the black level potential VB and the white level potential VW in the effective dark environment, and the black emission luminance in the effective bright environment is lower than or equal to a diffuse reflection luminance in the effective bright environment and higher than a black emission luminance in the effective dark environment.
摘要:
The present invention relates to a recording medium cartridge memory and recording/reproducing apparatus. A recording medium cartridge consists of a recording medium and a cartridge memory in which a unique ID of the apparatus used for recording/reproducing the cartridge memory is recorded in an unrewritable condition. The apparatus for recording/reproducing the recording cartridge memory consists of a sending/receiving unit which reads out an ID recorded in the cartridge memory, an ID inspection unit inspecting whether or not the ID recorded in the cartridge memory and an ID stored in the apparatus accord by comparing both, and a control unit which records data in a recording medium or control operations of a recording/reproducing unit which reproduces data from the recording medium based on an inspection result in the ID inspection unit.
摘要:
An image forming apparatus having a display panel with 1,920×480 electron-emitting devices arranged in a matrix and a plurality of fluorescent substances for emitting light by electrons emitted by these electron-emitting devices includes, as one of circuits for driving the display panel, an I/P converter for converting an interlaced scanning signal input at an NTSC image frame rate by a double frame rate and converting the signal into a non-interlaced scanning signal. The signal is controlled to define the maximum time interval during which the fluorescent substances are continuously irradiated with electrons from the electron-emitting devices in units of rows in line-sequential scanning, so as not to substantially degrade the linearity of the luminance characteristic of the fluorescent substances that changes depending on an electron irradiation time for the fluorescent substances.
摘要翻译:具有排列成矩阵的1,920×480个电子发射器件和由这些电子发射器件发射的电子发射光的多种荧光物质的显示面板的图像形成装置包括作为驱动显示面板的电路之一, I / P转换器,用于将以NTSC图像帧速率输入的隔行扫描信号以双帧速率转换,并将该信号转换为非隔行扫描信号。 信号被控制以限定在行顺序扫描中以行为单位的电子以电子发射装置的电子连续照射荧光物质的最大时间间隔,以便不会基本上降低亮度特性的线性 根据荧光物质的电子照射时间而变化的荧光物质。
摘要:
Improved is luminance of an image display apparatus in which a display panel is configured by a matrix wired plurality of electron emitting devices, and long life thereof is tried to be realized. In one select period, a scanning signal is applied to a plurality of scan interconnection. In a subsequent select period, a scanning signal is applied to a plurality of scan interconnections which were shifted with one scan interconnection portion. Between scanning signals, a low level portion is disposed. Also, pulse width modulation is carried out.