Abstract:
PURPOSE:To extend the set range of a threshold level of a shaping circuit, by forming the blades of a rotor so that their width and interval are different in size and have a prescribed ratio to the width of the photodetecting part of a transmission type photosensor. CONSTITUTION:The width of a photodetecting part 3 of a transmission type photosensor 1, the interval of blades 8a of a rotor 17, and the width of blades 8a are denoted as (a), (c), and (b), respectively, and the width (b) and the interval (c) are different in size and have a prescribed ratio to the width (a).
Abstract:
PROBLEM TO BE SOLVED: To prevent an electric noise generated from a camera module from being inputted to other electronic apparatus and the electric noise from being inputted to the camera module from an exterior. SOLUTION: The camera module 20A includes an imaging element 6 for photographing an external scene (object), an IR cut-off filter 4A which cuts an infrared ray incident to this imaging device 6, a lens 2A for focusing an image on the imaging device 6, a DSP 9 for signal processing a signal from the imaging element 6, and a peripheral electric part 7, etc., of the imaging device 6 and the DSP 9. A camera housing 5A covering the camera module 20A and the lens 2A are constituted by including a conductive material. Thus, the camera module 20A is shielded to an external electromagnetic wave from outside to perform an EMC/EMI remedy. Consequently, the camera module can prevent the electric noise from the exterior from affecting to the camera image, etc. and the noise from the camera module 20A from affecting to the other electronic apparatus. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PURPOSE: To detect high-density record precisely as a high output by composing one side of a bridge circuit of plural element groups which are arranged shifting in 1/2λ relation. CONSTITUTION: Magnetic patterns S, N, S... recorded on a magnetic medium come close to the position of a magneto-resistance element alternately through the rotation of a magnetic drum, and each element varies in resistance owing a leak magnetic field to perform conversion into an electric signal. Then, the magneto-resistance element 3 has eight elements to generate a signal of each phase. The elements A 1 WA 8 are arranged at intervals of 1/2λ, and respective couples of them are arranged at intervals of 1/4λ. Elements B 1 WB 8 shift in position from the group A by 7/8λ. COPYRIGHT: (C)1984,JPO&Japio
Abstract:
PURPOSE:To eliminate the malfunction of a measuring circuit and to decrease measurement errors by enclosing the microcurrent circuit of photodiodes with a circuit having the same potential with the potential of said circuit to prevent current leakage. CONSTITUTION:The photodiodes 102, 102' generate the output current corresponding to the wavelength and illuminance of light in the stage of receiving said light. The current is inputted to a conversion circuit 103 by which the current is subjected to signal processing and only the signal component corresponding to the wavelength of the light is extracted and outputted. The diodes 102, 102' are required to output faithfully the output current for the light of the illuminance in a wide range of several hundred thousand lux, but with the low illuminance of the detected light and the several hundred picoampere output, the leakage current flows to prevent the input of the prescribed current to the circuit 103 when there are conductors of different potentials in proximity to conductors 105, 105' for the anode of the output circuit. The conductors 105, 105' are thereupon directly enclosed by the common cathode conductor 106 of the same potential to input the output current of the diodes 102, 102' to the circuit 103 without leakage by which the detection of the light temp. with high accuracy is made possible.
Abstract:
PURPOSE:To achieve the improvement in mass productivity and the reduction of a cost by specifying the relation between a transmission type photosensor and a rotor thereby obtaining required performance despite the presence of variance in elements. CONSTITUTION:A transmission type photosensor 1 is of a U shape, and a light emitting element 2 and a photodetector 3 are incoporated on the inner side of its respective leading ends. A semiconductor light emitting diode (LED) is used for the element 2 and a phototransistor for the detector 3. Terminals 4, 5, 6 are for an electric power source, output and earth. Vane parts 8 of a rotor 7 are inserted between the light emitting and photodetecting parts of the photosensor 1, and when the rotor 1 revolves, the vanes 8a, 8b- shut off the light of the element 2 entering the detector 3 intermittently. In the sensor 1 and the rotor 7, the width of the photodetecting part of the photosensor is defined as (a), the spacing between the vanes of the rotor as (b), and the width of the vanes of the rotor as (c), and the (a), (b), (c) are so formed as to satisfy the conditions shown by the equations.
Abstract:
PURPOSE:To obtain a voltage-detecting circuit consuming little power, by triggering a C-MOS monostable multivibrator by means of a MOS nonstable multivibrator whose pulse width changes according to the service voltage and thereby controlling a D type flip-flop (FF). CONSTITUTION:The width of a pulse TA delivered by the MOS nonstable multivibrator AM formed of NOR gates G6 and G7, etc. of the voltage-detecting circuit changes according to the highness or lowness of the voltage of the secondary cell for clock charged by a solar cell. Meanwhile, the width of the output pulse of the C-MOS monostable multivibrator MM triggered by the rise of the pulse TA does not change. The outputs of the multivibrators AM and MM are impressed on the data terminal D and clock terminal C of the D type FF-FFD, respectively, and the width of the pulse TA from the multivibrator AM changing in accordance with the voltage is read out. And, based on the result of reading, the Q' output of FF-FFD is changed to be of high level or of low level, and thus the voltage of the cell or the like of the clock is detected with low consumption of power by small current.
Abstract:
PURPOSE:To measure the illuminance of incident light as well as color temperature by providing a circuit which outputs a signal proportional to the illuminance of the incident light to a color temperature detecting device which uses a color sensor. CONSTITUTION:The base-emitter voltage VBE1 of a transistor TrQ1 is proportional to the short-circuit current ISC1 of a photodiode PD1 and the current is proportional to the illuminance of incident on the PD1, so the illuminance of incidence on the PD1 is known from the voltage VBE1. Further, a voltage Vo' outputted through operational amplifiers 4 and 5 which amplifies the VBE1 is proportional to the logarithmic value of the illuminance of incidence on the PD1. The circuit including the PDs 1 and 2, operational amplifiers 1, 2 and 3, and Trs Q1 and Q2, on the other hand, forms a color temperature detecting circuit. Therefore, the illuminance of the incident light is measured as well as the color temperature.
Abstract:
PURPOSE:To obtain a liquid level indicator which can measure a consecutive change of a liquid level without causing any secular change, by providing a panel having a binary coded transmissive region between the light emitting elements and photodetector which are set in plural pairs in parallel to each other. CONSTITUTION:Light emitting elements A-E plus photodetectors A'-E' are provided at the places having opposing U-shaped slits within a case X. Then a panel Y formed by a light masking plate Zo containing light transmissive regions Za, Zb, Zc, Zd and Ze is provided between those light emitting elements and photodetectors. A float that moves up and down by the up-down movement of the liquid is attached to the panel Y. Furthermore, the distribution of the regions Za-Ze is formed in 2 =32 different ways according to the position. Accordingly the light receiving combination of the detector A'-E' varies according to the up-down change of the liquid. Thus this change of combination is detected to know the level of liquid.
Abstract:
PURPOSE:To constitute the simple light receiving circuit which is suitable for the operation at high temperatures and for sensing of very small amount of light by eliminating a dark current due to a light receiving element which does not receive the light from the current sensed by a light receiving element which actually receives the light. CONSTITUTION:The dark current of the light receiving element PT1, whic does not receive the light and which is used for cancelling the dark current, is the same as the dark current of the light receiving element PT2 which actually receives the light. The emitter currents ID and I3 of transistor Tr1 and Tr2 which are connected to both light receiving elements are adjusted to be equal, and a current mirror circuit is constituted. In said light receiving circuit, since the base current Ib=IPT2- I3 (where IPT2 is light current of PT2 + dark current) of Tr3 in the case the light from LED is inputted to PT2 is ID=I1 (comparison reference current)+IPT1 (dark current of PT1), Ib=(IPT2-IPT1)-I1 is obtaind. Therefore, the effect of the dark current is eliminated. Thus, the erroneous operation at high temperature can be eliminated, and the vary small amount of light can be sensed at a normal temperature.
Abstract:
PROBLEM TO BE SOLVED: To prevent electric signal noise from the outside of a camera module from affecting an imaging device and to prevent an electric signal from the imaging device of the camera module from affecting other electrical apparatus, by shielding the camera module. SOLUTION: A surface of a main body 21 of an imaging device is covered with a transparent conductive member 26 comprised of a transparent conductive paste resin or the like, and this is electrically connected with a ground potential GND. Thus, an imaging device 30 itself can be electromagnetically shielded. Said transparent conductive member 26 includes openings in portions corresponding to conductive parts of signal wiring portions (electrode terminals 23; A-D, F and G and wiring pattern 25 connected thereto) in the electrode terminals 23 and the wiring pattern 25 provided on the surface side of the main body 21 of the imaging device. COPYRIGHT: (C)2006,JPO&NCIPI