Pin photodiode and method of fabrication of the same
    1.
    发明授权
    Pin photodiode and method of fabrication of the same 失效
    引脚光电二极管及其制造方法

    公开(公告)号:US4885622A

    公开(公告)日:1989-12-05

    申请号:US204942

    申请日:1988-06-06

    摘要: A PIN photodiode is composed of a lower electrode deposited on a substrate, a photoelectric transducer of PIN construction deposited on the lower electrode, and an upper electrode deposited on the photoelectric transducer. A method of fabricating the PIN photodiode is also disclosed. All of electron-and-hole pairs generated in the photoelectric transducer in response to application of light are biased by the lower and upper electrodes. These electron-and-hole pairs are quickly picked up as a current between the electrodes for detecting the light falling on the PIN photodiode.

    摘要翻译: PIN光电二极管由沉积在基板上的下电极,沉积在下电极上的PIN结构的光电变换器和沉积在光电变换器上的上电极组成。 还公开了制造PIN光电二极管的方法。 响应于光的应用而在光电传感器中产生的所有电子和空穴对被下电极和上电极偏置。 这些电子和空穴对被快速地拾取为用于检测落在PIN光电二极管上的光的电极之间的电流。

    High signal to noise ratio optical image reader
    2.
    发明授权
    High signal to noise ratio optical image reader 失效
    高信噪比光学图像读取器

    公开(公告)号:US4733097A

    公开(公告)日:1988-03-22

    申请号:US865027

    申请日:1986-05-20

    CPC分类号: H01L27/14643 H04N5/2173

    摘要: An optical image reader includes plural pairs of switches, each pair of switches having a CMOS structure signal switch and a CMOS structure dummy switch, plural photosensing elements each corresponding to each pair of switches, plural inverters each corresponding to each pair of switches, a signal line, a dummy line, a shift register and a differential amplifier. A first switch terminal of each signal switch is connected to the corresponding photosensing element, and a second switch terminal thereof is connected to one input terminal of the differential amplifier through the signal line. A first switch terminal of each dummy switch is connected to another input terminal of the differential amplifier through the dummy line, and a second switch terminal thereof is in an open state. A first control terminal of each signal switch is connected to a first control terminal of corresponding each dummy switch, an input terminal of the corresponding inverter, and a corresponding output terminal of the shift register. A second control terminal of each signal switch is connected to a second control terminal of the corresponding dummy switch and an output terminal of the corresponding inverter. By applying a scanning pulse to each pair of switches for switching them from the shift register, an output of a photo signal and a spike noise appears on the signal line, and an output of a spike noise appears on the dummy line. These outputs are differentially amplified by the differential amplifier.

    摘要翻译: 光学图像读取器包括多对开关,每对开关具有CMOS结构信号开关和CMOS结构虚拟开关,每对开关对应的多个感光元件,各对应于每对开关的多个反相器,信号 线,虚拟线,移位寄存器和差分放大器。 每个信号开关的第一开关端子连接到相应的感光元件,其第二开关端子通过信号线连接到差分放大器的一个输入端。 每个虚拟开关的第一开关端子通过虚拟线路连接到差分放大器的另一输入端,并且其第二开关端子处于打开状态。 每个信号开关的第一控制端连接到对应的每个虚拟开关的第一控制端,相应的反相器的输入端和移位寄存器的相应的输出端。 每个信号开关的第二控制端连接到对应的虚拟开关的第二控制端和对应的反相器的输出端。 通过将扫描脉冲施加到每对开关以从移位寄存器切换,信号线上出现光信号和尖峰噪声的输出,并且伪线上出现尖峰噪声的输出。 这些输出由差分放大器差分放大。

    Image reader with scanning by array of sequentially illuminated light
sources
    4.
    发明授权
    Image reader with scanning by array of sequentially illuminated light sources 失效
    具有顺序照明光源阵列扫描的图像读取器

    公开(公告)号:US4672219A

    公开(公告)日:1987-06-09

    申请号:US748423

    申请日:1985-06-25

    IPC分类号: H04N1/031 H04N1/193 H01J40/14

    CPC分类号: H04N1/031 H04N1/1931

    摘要: An image reader is adapted to read an image represented on a document. The image reader comprises a reading unit, an LEDs driving circuit, and means for moving the reading unit and the document relatively. The above reading unit comprises an LEDs array arranged in a straight line as light sources, a rod lens array for guiding the light emitted from each LED of the LEDs array and focusing the light on the document, and a pair of photosensors being disposed in parallel and connected in parallel with respect to each other for converting a reflected light from the document to a photocurrent. And each LED of the LEDs array is turned on only one at a time sequentially by means of the LEDs driving circuit, then the reading of the document is effected by means of the photosensors.

    摘要翻译: 图像读取器适于读取在文档上表示的图像。 图像读取器包括读取单元,LED驱动电路和用于相对地移动读取单元和文档的装置。 上述读取单元包括以直线作为光源布置的LED阵列,用于引导从LED阵列的每个LED发射的光并将光聚焦在原稿上的棒状透镜阵列,以及平行设置的一对光电传感器 并且彼此并联连接,以将来自文件的反射光转换为光电流。 并且LED阵列的每个LED依次通过LED驱动电路一次打开,然后通过光电传感器实现文件读取。

    Thermal recording system
    5.
    发明授权
    Thermal recording system 失效
    热记录系统

    公开(公告)号:US4268838A

    公开(公告)日:1981-05-19

    申请号:US57976

    申请日:1979-07-16

    摘要: A thermal recording system in which a thermal treated paper is printed by a thermal head having a series of aligned heat-generating resistor elements and current-holding elements like SCR (thyristor) corresponding to each of said heat-generating resistor elements for holding electric current. The power source for heating said resistor elements is a periodic voltage like a commercial alternate current (A.C.), or a pulsating current which is obtained by rectifying the commercial alternate current. The printing to each cell is accomplished within a single period of said periodic power source, and the duration of heating the resistor elements within said single period is controlled according to the peak voltage or current of the power source, in order to provide the constant concentration or density of printing. Thus, means for converting the peak value of the power source to the time delay is provided. The resistor elements are heated after said time delay in each half cycle of said periodic power source, until the instantaneous voltage or current of the power source reaches zero. Then, the printing concentration is free from the change of the voltage of the power source.

    摘要翻译: 一种热敏记录系统,其中热处理纸由具有一系列对准的发热电阻器元件和诸如SCR(晶闸管)的电流保持元件的热敏打印头,所述电流保持元件对应于用于保持电流的每个所述发热电阻元件 。 用于加热所述电阻器元件的电源是诸如商业交流电(ACC)的周期性电压,或通过整流商用交流电流而获得的脉动电流。 每个单元的打印在所述周期性电源的单个周期内完成,并且根据电源的峰值电压或电流来控制在所述单个周期内加热电阻元件的持续时间,以便提供恒定的浓度 或印刷密度。 因此,提供了将电源的峰值转换为时间延迟的装置。 电阻元件在所述周期性电源的每个半周期中的所述时间延迟之后被加热,直到电源的瞬时电压或电流达到零。 然后,打印浓度不受电源电压的变化的影响。