摘要:
A semiconductor laser beam device, comprising a stem type package having a base part and a heat sink part, wherein the heat sink part is cylindrically formed so as to be concentric to the base part, a groove is formed along the axial direction of the heat sink part, and a semiconductor laser beam element is disposed at the bottom part of the inner wall surfaces of the groove whereby the radiating capability of the semiconductor laser beam device can be increased by increasing the volume of the heat sink part, and the element can be protected by the groove.
摘要:
The control circuit 11 causes display of messages received through the communication unit 1 in the display unit 14 in list form. A cursor for making selections from the messages displayed in list form has different patterns. The control circuit 11 associates the cursor patterns with message types. In another embodiment, the control circuit 11 groups received messages into new messages not yet reproduced by a user and old messages already reproduced, causes display of the number of the new messages in a predetermined area of the display unit when the new messages are stored in RAM 13, and display of the number of the old messages in said predetermined area when the new messages are not stored in RAM 13.
摘要:
A liquid crystal display device includes a liquid crystal panel, at least one optical sheet substantially rectangular in shape, where first and second openings are formed on the end edges of one side of the optical sheet at a predetermined interval, a main frame in which the optical sheet(s) are placed, and a sub-frame arranged above the main frame, in which the main frame is provided with first small protrusions jutting upward corresponding to the first openings at the top surface, while the rear surface of the sub-frame is provided with second small protrusions jutting downward corresponding to the second openings, thereupon the first small protrusions are inserted into the first openings of the optical sheet(s) and the second small protrusions are inserted into the second openings to connect and install the sub-frame to the main frame, and the optical sheet(s) are then aligned and fixed. Accordingly, the optical sheets are aligned better and firmly fixed to achieve larger display screens and thinner liquid crystal display devices.
摘要:
An optical print head has a light-emitting device 22 having n individual electrodes 28, p common electrodes 27, and a plurality of (n×p) light-emitting parts 26 selected by those individual and common electrodes and a driving IC 1 having individual electrodes and m group-selecting terminals CD1 to CD40. A plurality of (q) light-emitting devices 22 are provided for one driving IC 1, and the number (q) of light-emitting devices 22 is determined by the number (p) of common electrodes 27 provided on each light-emitting device 22 and the number (m) of the group-selecting terminals CD provided on the driving IC 1.
摘要:
A simple matrix drive type liquid crystal display device with enhanced display quality is provided. In line-at-a-time scanning, a scanning electrode group is supplied with two selecting voltages alternately; a signal electrode group is supplied with two voltages close to the intermediate value between the two selecting voltages. Which voltage is applied to the signal electrode is determined in accordance with the selecting voltage applied to the scanning electrode at that moment and a video signal in such a way that selected picture elements receive a large voltage and non-selected picture elements receive a small voltage. The output voltage of the power source circuit, which supplies power to the scanning circuit and the signal circuit that apply voltages to the scanning and signal electrode groups, is monitored so that, if the voltage is below a predetermined value, the liquid display device will not start display even when it receives a signal requesting starting of display from the outside.
摘要:
In an optical disk reproducing device capable of rotating an optical disk at a selected one of a plurality of preset linear velocities, vibration or shock of the device is detected during rotation of the disk, and the linear velocity of the disk is determined based on the result of the detection of the vibration or shock to restrain the vibration and shock within a permissible range. A limit rotational velocity above which the vibration or shock is excessive may be determined during a test conducted each time a disk is inserted, and the linear velocity of the disk during reproduction may be determined such that the rotational velocity does not exceed the limit rotational velocity.
摘要:
In a variable frequency divider capable of N+1/2 frequency division, a programmable frequency divider alternately frequency-divides an input signal by a frequency division ratio N (N being an integer) or by a frequency division ratio N+1. A first signal generating circuit generates a first signal in synchronism with an output signal of the programmable frequency division circuit. A second signal generating circuit generates a second signal which is identical to the first signal but delayed by half a period of the input signal. An output circuit alternately selects the first and second signals, and outputs the selected signal as frequency-divided signal. A delay circuit outputs a delayed signal identical to the first signal but delayed by one period of the input signal. A preset signal generating circuit alternately selects the delayed signal and the first signal, and presets the programmable frequency division circuit with the selected signal. The programmable frequency divider used may operate at the same speed as in N frequency division.
摘要:
In a multi-disk player having a loading and unloading equipment for selecting an arbitrary disk cassette from a containing portion for containing a plurality of trays each supporting one disk cassette in which a disk-shaped record medium is contained in a cassette case with they being arranged in a lot of upper and lower stages, loading the selected disk cassette into a record playing equipment disposed behind the containing portion and returning the same to its original position in the containing portion from the recording playing equipment after the playing of the disk cassette is terminated,the containing portion has a plurality of ejecting operating means for each releasing a locking function for disk cassette so that the operating means corresponding to an arbitrary disk cassette in the containing portion is operated to eject the disk cassette toward the front of the containing portion.