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:
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:
Compounds of formula (I): ##STR1## (in which R.sup.1 -R.sup.7 are hydrogen or various organic groups, n is 1-10, Ar is an aromatic group, U is CH.sub.2 or a carbon atom doubly bonded to either one of its adjacent carbons, and W is >CH.sub.2, >C.dbd.O, >CHOH, >C.dbd.NOH or various derivatives thereof) have the ability to lower the levels of blood lipid peroxides and blood sugars and to inhibit the activity of aldose reductase; they may be used therapeutically for these purposes.
摘要翻译:式(I)化合物:其中R 1 -R 7为氢或各种有机基团,n为1-10,Ar为芳族基团,U为CH 2或与两者双键结合的碳原子 的相邻碳,W是> CH2,> C = O,> CHOH,> C = NOH或其各种衍生物)具有降低血脂过氧化物和血糖水平并抑制醛糖还原酶活性的能力 ; 它们可以用于治疗这些目的。
摘要:
Thiazolidinone derivatives of formula (I): ##STR1## in which R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are various atoms or organic groups, Ar is an aromatic group and n is an integer have valuable pharmacological activities including the ability to reduce blood glucose levels and blood lipid levels.
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:
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:
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:
A filter for a photoelectric touch panel disposed in front of arrays, formed on a framework on the circumference of a screen, of aligned light emitting elements and photosensitive elements characterized in that the same is provided with protrusions around the center of its portions in front of these arrays.
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:
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.