Circuit for adjusting sensitivity of optical character reader and method
thereof
    41.
    发明授权
    Circuit for adjusting sensitivity of optical character reader and method thereof 失效
    用于调整光学字符读取器的灵敏度的电路及其方法

    公开(公告)号:US5382782A

    公开(公告)日:1995-01-17

    申请号:US157757

    申请日:1993-11-24

    IPC分类号: G06K7/10

    CPC分类号: G06K7/10851 G06K2207/1018

    摘要: A circuit for adjusting the sensitivity of an optical character reader in which light is applied to an information-recorded material by an LED array and the information is read by a line sensor. The optical character reader is switched to a sensitivity adjusting mode. It reads a reference material having uniform reflectivity on the surface. The read signal is A/D converted and the microcomputer 10 detects a discrepancy between the amounts of light depending on the different portions of the line sensor. Based upon the detection, the microcomputer sets the applying time of driving currents to the respective LEDs so that the light is uniformly applied to the reference material. The set value is stored in a memory. Thereafter, since the amounts of light from the LEDs of the LED array are adjusted according to the set value, the amount of the reflected light to the line sensor 5 can be uniform. Thus, a series analog voltage accurately responding to the darkness and brightness of the information can be obtained.

    摘要翻译: 用于调整光学字符读取器的灵敏度的电路,其中光通过LED阵列施加到信息记录材料,并且信息由线传感器读取。 光学字符读取器切换到灵敏度调整模式。 它读取在表面上具有均匀反射率的参考材料。 读取信号进行A / D转换,并且微计算机10根据线传感器的不同部分检测光量之间的差异。 基于检测,微型计算机将驱动电流的施加时间设定到各个LED,使得光均匀地施加到参考材料。 设置值存储在内存中。 此后,由于根据设定值调整来自LED阵列的LED的光量,所以能够使与线传感器5的反射光量一致。 因此,可以获得准确地响应于信息的暗度和亮度的串联模拟电压。

    Automatically adjusting drive circuit for light emitting diode
    42.
    发明授权
    Automatically adjusting drive circuit for light emitting diode 失效
    自动调节发光二极管的驱动电路

    公开(公告)号:US5345167A

    公开(公告)日:1994-09-06

    申请号:US56109

    申请日:1993-05-03

    IPC分类号: H03K17/78 G05F1/56 G05B24/02

    CPC分类号: G05F1/56 Y10S323/902

    摘要: A light emitting diode driving circuit for supplying a driving pulse to a light emitting diode to thereby cause the light emitting diode to intermittently emit light is disclosed which comprises a clamping circuit, a photodiode disposed in the vicinity of the light emitting diode for detecting the optical output power of the light emitting diode, an AC amplifier having its DC operating point stabilized by means of a DC feedback circuit for AC amplifying the detected output from the photodiode, a shaping circuit for shaping the output amplified signal from the AC amplifier, and a comparison circuit for comparing for voltage the output shaped signal from the shaping circuit and a reference voltage, in which the clamping voltage of the clamping circuit is controlled by the output of the comparison circuit and, thereby, the optical output power of the light emitting diode is maintained constant.

    摘要翻译: 公开了一种用于向发光二极管提供驱动脉冲从而使发光二极管间歇地发光的发光二极管驱动电路,其包括钳位电路,设置在发光二极管附近的光电二极管,用于检测光 发光二极管的输出功率,具有通过DC反馈电路稳定的DC工作点的AC放大器,用于对来自光电二极管的检测输出进行AC放大;整流电路,用于对来自AC放大器的输出放大信号进行整形;以及 用于比较来自整形电路的输出整形信号的电压与参考电压的比较电路,其中钳位电路的钳位电压由比较电路的输出控制,从而使发光二极管的光输出功率 保持不变。

    Light collimating member for photoelectric transfer apparatus
    45.
    发明授权
    Light collimating member for photoelectric transfer apparatus 失效
    光电转接装置的光准直件

    公开(公告)号:US4818860A

    公开(公告)日:1989-04-04

    申请号:US81832

    申请日:1987-08-05

    申请人: Kazuo Hasegawa

    发明人: Kazuo Hasegawa

    摘要: A light conducting member for use in photoelectric transfer apparatus is disclosed comprising a large number of optical fibers bundled into an integral body, wherein each optical fiber is constituted of a transparent core and a light absorbing clad covering over the periphery of the core, and wherein the core and the clad have indexes of refraction virtually equal to each other.

    摘要翻译: 公开了一种用于光电转移装置的导光构件,其包括捆扎在一体中的大量光纤,其中每个光纤由透明芯和覆盖在芯周边的光吸收覆层构成,其中 核心和包层的折射率几乎相等。

    Optical coordinate input device having light adjusting means located in
front of each light receiving means
    46.
    发明授权
    Optical coordinate input device having light adjusting means located in front of each light receiving means 失效
    具有位于每个光接收装置前方的光调节装置的光学坐标输入装置

    公开(公告)号:US4771170A

    公开(公告)日:1988-09-13

    申请号:US86955

    申请日:1987-08-19

    申请人: Kazuo Hasegawa

    发明人: Kazuo Hasegawa

    IPC分类号: G06F3/033 G06F3/042 G01V9/04

    CPC分类号: G06F3/0421

    摘要: An optical coordinate input device wherein there is no possibility of operation in error or of destruction of a light receiving element and a correct coordinate signal can be produced even if external light of a high intensity acts upon the light receiving element. The device comprises light amount adjusting means of the transmissive type located in front of light receiving elements, and controlling means for controlling the amount of light to be passed through the light amount adjusting means in response to an amount of light incident to the light receiving elements. Thus, if there is the possibility that an output value of the light receiving elements may reach a saturation condition due to external light of a high intensity, the light transmittivity of the light amount adjusting means is lowered to decrease the amount of external light to be received the light receiving elements.

    摘要翻译: 即使高强度的外部光作用在光接收元件上,也可以产生光学坐标输入装置,其中不存在错误操作的可能性或者光接收元件的破坏和正确的坐标信号。 该装置包括位于光接收元件前面的透射型光量调节装置,以及控制装置,用于根据入射到光接收元件的光量来控制通过光量调节装置的光量 。 因此,如果由于高强度的外部光而导致光接收元件的输出值可能达到饱和状态,则光量调节装置的光透射率降低,从而将外部光量减少为 接收光接收元件。

    Remote control circuit
    47.
    发明授权
    Remote control circuit 失效
    遥控电路

    公开(公告)号:US4764981A

    公开(公告)日:1988-08-16

    申请号:US868792

    申请日:1986-05-29

    IPC分类号: H04Q9/00 G08C25/02 H04B9/00

    CPC分类号: G08C25/02

    摘要: A remote control device comprises a control input unit, a transmission unit, a receiving unit, a reply unit and a command control circuit. The control input unit outputs a control signal. The transmission unit stores the control signal in a first memory circuit and transmits a light signal based on the control signal. A main device controlled by the remote control unit receives in a first receiver circuit and stores in a second memory circuit the signal from the transmission unit. The main device has a reply signal unit for transmitting a return signal based on the signal from the receiving unit to a second receiver circuit of the remote control device. The command control circuit compares the signal received by the second receiver circuit and the signal stored in the first memory circuit. When these compared signals are in agreement, the command control circuit outputs to the transmission unit a signal based on the signal stored in the second memory circuit thereby to cause the operating device to operate. When they are not in agreement, then the circuit outputs a signal to a display unit for an error display.

    摘要翻译: 遥控装置包括控制输入单元,发送单元,接收单元,应答单元和命令控制电路。 控制输入​​单元输出控制信号。 发送单元将控制信号存储在第一存储器电路中,并基于控制信号发送光信号。 由遥控单元控制的主设备在第一接收机电路中接收并存储来自传输单元的信号在第二存储器电路中。 主设备具有用于基于来自接收单元的信号向远程控制设备的第二接收机电路发送返回信号的应答信号单元。 命令控制电路将由第二接收机电路接收的信号和存储在第一存储器电路中的信号进行比较。 当这些比较信号一致时,命令控制电路基于存储在第二存储器电路中的信号向传输单元输出信号,从而使操作装置工作。 当它们不一致时,电路将信号输出到显示单元以进行错误显示。

    Optical coordinate input device having waveform shaping circuit
    49.
    发明授权
    Optical coordinate input device having waveform shaping circuit 失效
    具有波形整形电路的光学坐标输入装置

    公开(公告)号:US4725726A

    公开(公告)日:1988-02-16

    申请号:US881192

    申请日:1986-07-02

    CPC分类号: G06F3/0421

    摘要: An optical coordinate input device comprises a plurality of light emitting elements arranged so that their optical axes intersect mutually, a plurality of light receiving elements arranged so as to receive the light signals of the light emitting elements, a drive circuit for turning on/off the light emitting elements on the basis of a drive signal to cause them to provide the light signals, a first switching circuit for switching the output given from the drive circuit to among the light emitting elements, a second switching circuit for switching the signals given from the light receiving elements in correspondence with the light emitting element lighting, and a waveform shaping circuit for regulating the signal given from the second switching circuit to a certain voltage level on the basis of the drive signal.Since the waveform shaping circuit exerts its regulation action on the basis of the drive signal, the present optical coordinate input device can provide reliably the coordinate signal even if operated at a high speed without depending upon the precision of optical elements and without being influenced by disturbance light, switching noises, and the like.

    摘要翻译: 光学坐标输入装置包括多个发光元件,其布置成使得它们的光轴相互交叉,多个光接收元件布置成接收发光元件的光信号,驱动电路用于打开/关闭 基于驱动信号使发光元件使其提供光信号;第一开关电路,用于将从驱动电路给出的输出切换到发光元件;第二开关电路,用于切换从 与发光元件照明相对应的光接收元件,以及用于根据驱动信号将从第二开关电路给出的信号调整到一定电压电平的波形整形电路。 由于波形整形电路基于驱动信号进行调节动作,因此即使在高速运转的情况下,本光轴坐标输入装置可以可靠地提供坐标信号,而不依赖于光学元件的精度而不受干扰的影响 光,切换噪声等。

    Rectangular wave-shaping circuit with varying threshold level
    50.
    发明授权
    Rectangular wave-shaping circuit with varying threshold level 失效
    矩形波形整形电路具有不同的门限电平

    公开(公告)号:US4652774A

    公开(公告)日:1987-03-24

    申请号:US752907

    申请日:1985-07-08

    申请人: Kazuo Hasegawa

    发明人: Kazuo Hasegawa

    CPC分类号: H03K5/08 H03K5/1534

    摘要: A wave-shaping circuit for receiving an electrical signal from a photosensitive device, for example, and delivering a rectangular output does not use an expensive DC amplifier but comprises a comparator, a pair of diodes connected between first and second input terminals of the comparator in an antiparallel relation, and a capacitor placed between the first input terminal of the comparator and the signal input terminal of the circuit for filtering out DC component. A combination of a zener diode and a capacitor is connected to the second terminal of the comparator to establish a threshold level, with which the signal level applied to the first input terminal of the comparator is compared.

    摘要翻译: 用于从感光装置接收电信号并输出​​矩形输出的波形整形电路不使用昂贵的DC放大器,而是包括比较器,连接在比较器的第一和第二输入端之间的一对二极管 反并联关系,以及放置在比较器的第一输入端子和电路的信号输入端子之间以滤除DC分量的电容器。 齐纳二极管和电容器的组合连接到比较器的第二端,以建立阈值电平,通过该阈值电平比较施加到比较器的第一输入端的信号电平。