Kazuhiko Honda has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
Abstract: A visible light characteristic changing layer formed from photosensitive or heat-sensitive material is formed in a location which can be viewed from a part of a label surface of an optical disk. The optical disk is set on a turntable of an optical disk unit while the label surface of the optical disk is directed downward. The optical disk and an optical pickup are moved mutually along the plane of the optical disk. In synchronism with the relative movement, the power of a laser beam output from the optical pickup is modulated in accordance with image data, such as characters or graphic images to be printed, and the laser beam is emitted onto the visible light characteristic changing layer. As a result of the visible light characteristic changing layer being exposed to the laser beam, a visible-light reflectivity of the visible light characteristic changing layer is changed, thereby forming a image corresponding to the image data on the label surface.
Abstract: A coated steel material excellent in corrosion resistance and a method of producing the same, wherein a coated steel material has on the surface of the steel sheet a Zn-alloy coating layer containing 1-10 wt % of Mg, 2-19 wt % of Al and 0.01-2 wt % of Si, where Mg and Al satisfy Mg (%)+Al (%)≦20%, the balance being Zn and unavoidable impurities, and has a coating layer structure of a Mg intermetallic compound or the like. As a base metal treatment, it is preferably provided with a Ni coating layer. The coated Zn-alloy coated steel sheet may have provided on the coating layer, as an intermediate layer, a chromate film layer, and, as an upper layer, an organic coating layer. The Zn-alloy coating layer may further contain one or more of 0.01-1 wt % of In, 0.01-1 wt % of Bi and 1-10 wt % of Sn. The coated steel material may be painted.
Abstract: An optical disk recording apparatus operates on an optical disk having circular tracks which are provisionally written with an index signal used for securing a constant linear velocity of the optical disk from an innermost circular track to an outermost circular track, and records data along the circular tracks at different linear densities on different annular zones of the optical disk. In the apparatus, a disk drive section rotates the optical disk while synchronizing the index signal successively read from the rotated optical disk with a predetermined reference clock signal to thereby maintain the constant linear velocity of the circular tracks. A clock generating section multiples or divides the reference clock signal by different rates to generate different writing clock signals in correspondence to the different annular zones of the optical disk.
Abstract: Optical disk recording device includes a beam projection section for projecting a light beam onto a write-once optical disk, and a photodetector having two light receiving surfaces divided in a radial direction of the optical disk for detecting reflected light from the optical disk, and wobble-signal reproduction circuitry for reproducing a wobble signal on the basis of reflected light detection signals output from the two light receiving surfaces of the photodetector. The wobble-signal reproduction circuitry includes peak-holding circuits for, when the optical disk device is in a reproduction mode, detecting and holding respective upper envelopes of the two light detection signals from the photodetector. The wobble-signal reproduction circuitry also includes holding circuits for, when the optical disk device is in a recording mode, detecting respective lower envelopes of the two light detection signals from the photodetector.
Abstract: Prior to an actual record on an optical disc (10), in an outer peripheral test area (22a) which is on the outer peripheral side with respect to a program area (18) of the optical disc (10), a test record is repeatedly performed a plurality of times while the velocity is controlled to a predetermined linear velocity and the recording power is sequentially changed. An appropriate recording power value at the linear velocity is obtained on the basis of reproduced signals of the plural test records in the outer peripheral test area. In an actual record on the optical disc (10), the record is performed while the recording power is controlled to the appropriate value in accordance with the linear velocity, on the basis of the obtained recording power value.
Abstract: CLV-type recordable optical disk includes a plurality of tracks which are formed in such a manner that 2&pgr;Tp/&lgr; substantially equals an even-number multiple of 0.5 where Tp is a track pitch and &lgr; is a wavelength of a track wobble. Each of the tracks is divided into a plurality of ECC blocks, and each of the ECC blocks is composed of 16 sectors. Each of the sectors is composed of 26 sync frames. In each of the sectors of the track, information recording areas are set normally in even-numbered sync frames. However, in each portion where there would occur overlap in the information recording area, in the radial direction of the disk, between the track and an adjoining track located inward of the track, the information recording areas are set in odd-numbered sync frames. One piece of address information is divided into a plurality of address information elements and recorded dispersedly in the sync frames across a plurality of the sectors.
Abstract: Recording pulses are each provided in a train of divided pulses, one of which has a greater pulse width than the other divided pulse. Laser light power emitted by a laser diode is detected at predetermined timing corresponding to the greater-width divided pulse, and an electric current for driving the laser diode is controlled in such a manner that the detected laser light power appropriately follows a predetermined laser power value. Thus, in the case where the recording pulses are each provided in a train of divided pulses, this arrangement can accurately detect the laser light power and thereby achieves high-precision control of the laser light power.
Abstract: In a disk recording and sound reproducing device, a disk is intermittently accessed for data read out to write the disk readout data into a memory. The written data in the memory are continually read out and expanded to output the expanded data as playback data signals. Data to be recorded are continually written into the memory, during which time the data to be recorded are intermittently read out from the memory 10 to be demodulated so as to record the demodulated data onto the disk. A clock controller, in accordance with a pitch change instruction, varies the rate of data readout from the memory (in reproduction) or the rate of data writing into the memory (in recording). Corresponding to the data readout or writing rate, a memory controller controls the intervals at which the data are read out from the disk (in reproduction) or the intervals at which the data are recorded onto the disk (in recording).
Abstract: In the editing mode where data is read out from a disk for a desired editing process and the thus-edited data is recorded back onto the disk, the data readout from and recording onto the disk are performed alternately. At storage locations of a memory previously occupied by data read out and supplied for reproduction, there are sequentially stored compressed data to be recorded that have been obtained from editing the read-out data. Data readout from the disk is performed until the data stored unread in the memory reaches a predetermined amount. When the data amount in the memory has reached the predetermined amount, the data are read out from the memory and recorded onto the disk by a predetermined unit amount.
Abstract: Test EFM signal reproduced from an optical disk is converted through a slicer into binary value, and a synchronizing signal having an 11T--11T signal pattern is detected by a frame synchronization circuit. Upon detection of the synchronizing signal, a detection timing counter predicts timing when a next synchronizing signal will be detected. The respective level values at the intermediate points of the former and latter 11T sections of the synchronizing signal are sampled and held by sample and hold circuits. Once a next synchronizing signal is detected at the predicted timing, a synchronization determination circuit transfers the outputs of the sample and hold circuits to another sample and hold circuits. The outputs of the other sample and hold circuit are averaged by filters and asymmetry is calculated by an asymmetry calculation circuit. On the basis of the calculated asymmetry, a determination circuit determines an optimum recording power value.
Abstract: A disc recording and reproducing device includes a recording start switch for starting recording on a disc in which a table-of-contents area is provided in addition to a recording area in which main information is recorded, an optical pick-up and a magnetic head for performing intermittent recording on the disc, a recording stop switch for stopping recording on the disc, a music head designation key and a music interval detection circiut for generating a pause signal indicating a pause in the main information during the recording on the disc, and a circuit including a system controller for detecting the pause signal and writing a stop address of main information recorded immediately before arrival of the pause signal and a start address of next main information to be recorded in the table-of-contents area during waiting time of the intermittent recording.
Abstract: An apparatus for recording and reproducing a signal on a disc type recording medium includes a recording section for intermittently writing on a disc data to be recorded whose bit rate is 1/2 or less of a rate of recording data on the disc during a recording mode, a reproduction section for intermittently reading from the disc reproduced data whose bit rate is 1/2 or less of a rate of reproducing data from the disc during a reproduction mode, and a write and/or read unit for performing writing and/or reading on the disc during waiting time in the recording and/or reproduction mode. The apparatus is capable of monitoring recorded data instantaneously during the recording mode, editing recorded data with standard recording and reproducing heads, recording and reproducing a four-channel signal with heads for a two-channel signal, and dubbing data read from a reproducing optical disc to a recording optical disc with a recording magnetic head and a recording and reproducing optical head.
Abstract: An erasable black ink composition for use in ball-point pens is disclosed. The composition comprises rubber, a low boiling solvent, a black pigment, a quality adjuster and a lubricant, wherein the content of the rubber is 18.9 to 20% by weight of the composition, the ratio by weight of the low boiling solvent to the rubber is in the range of 1.56:1 to 1.64:1, the ratio by weight of the pigment to the rubber is in the range of 0.8:1 to 0.9:1, and the ratio by weight of the quality adjuster to the pigment is in the range of 1.7:1 to 1.8:1. Traces of the ink can be erased by a rubber eraser within an initial period of time.
Abstract: In a video disc player system, the NTSC color TV signal is recorded on the video disc, of which carrier chroma signal has been lowered to e.g., 1.52 MHz, due to limitations on the available frequency band within this system. To reproduce this recorded TV signal by the PAL TV receiver, it is necessary to convert it into the corresponding standard PAL TV signal. To this end, the lower carrier chroma signal frequency is up-converted to the subcarrier one (4.43 MHz) of the PAL TV system. There are provided a doubler which can double a subcarrier signal frequency derived from a standard subcarrier generator, a DC source and an adder circuit in which the doubled subcarrier signal frequency (8.86 MHz) is added to the DC component under the given adding ratio so as to produce a modulating signal. The up-converted carrier chrominance signal is then modulated by the modulating signal.
Abstract: A signal converter for a color TV is used for converting a signal of the NTSC system, in which a subcarrier is quadrature-modulated by two chroma signal components, to a signal of the PAL system, in which a subcarrier is quadrature-modulated by two chroma signal components one of which two chroma signal components is inverted for each successive line, or vice versa. The signal converter includes a signal input terminal which receives an original signal having chroma signal components which are quadrature-modulated on a subcarrier having a frequency f1, a signal output terminal for producing a converted signal having chroma signal components which are quadrature-modulated on a subcarrier having a frequency f2 (where f1.noteq.
Abstract: Color TV signal data picked up from an NTSC video disc is separated by a separation filter into a first chrominance signal (1.52 MHz) and a luminance signal. In this case, the rotational frequency of the video disc is set such that a horizontal line frequency of the luminance signal is 15.625 kHz, which is the line frequency of a PAL signal component. The first chrominance signal (1.52 MHz) is converted by a frequency converter to a second chrominance signal (4.43 MHz). The second chrominance signal (4.43 MHz) is supplied to the first input terminal of a switch through a 45.degree. phase shifter and directly to the second input terminal of the switch. The switch alternately selects the first and second input terminals thereof in response to a burst gate pulse, whereas the switch selects only the second input terminal during any period other than the burst period. A third chrominance signal is then produced at an output terminal of the switch. The third chrominance signal is supplied to a modulator.
Abstract: An aqueous ink composition, suitable for use in writing instruments including an ink passage made of a plastic material, consisting essentially of water, a water-soluble dye and a naphthalene derivative as essential ingredients and a glycol or a polyglycol as a moisture-retaining agent, a very small amount of a surface active agent as a penetrant, an anti-mold agent and other additives as optional ingredients. The naphthalene derivative imparts affinity for the plastic material.