Abstract: A semiconductor storage device has a simple control circuit that is added to a general one-port RAM. Taking a port-A clock signal as the reference, the control circuit generates a select signal that selects a port A during the period from elapse of a first predetermined time from the reference timing until a second predetermined time has elapsed and selects a port B during other periods. The control circuit generates a port-A delayed clock signal in the period in which the port A is selected. The control circuit generates a port-B delayed clock signal during the period from elapse of the second predetermined time until a third predetermined time has elapsed. The control circuit generates a conflict monitoring signal during the period from the reference timing until the second predetermined time has elapsed. When a clock signal is supplied from the port B while the conflict monitoring signal is being generated, the port-B delayed clock signal is masked while the conflict monitoring signal is being generated.

Abstract: A display includes capacitive display elements, output drivers, scan switches, precharge switches, and a precharge stopper. The drivers provide drive currents or voltages corresponding to display data, thereby driving the display elements correspondingly to the data. The precharge stopper determines whether display data corresponds to a specific state and prevents the display element from being precharged when the display data corresponds to the specific state.

Abstract: A color balancing circuit for a flat panel display such as an electroluminescent display generates a primary current that can be varied to adjust the overall brightness of the display. Three currents related to the primary current by selectable ratios are generated, by current mirror circuits, for example; the ratios can be individually varied to adjust the color balance. Driving currents are generated from the three adjusted currents, by mirroring the adjusted currents, for example, and are used to drive display elements that emit light in the three primary colors. Image brightness and color balance can accordingly be adjusted separately, even though both are adjusted by adjusting the driving current. Circuit size is reduced in that the same primary current is used for all three primary colors.

Abstract: A display panel driver has two driver circuits that drive separate halves of a display panel. Each driver circuit occupies a separate integrated circuit chip. The driver has a screen saving mode in which each driver circuit displays an independent screen saving image that moves in synchronization with a timing signal. The timing signal is generated in one driver circuit and transmitted by a chip-to-chip interface to the other driver circuit. The two screen saving images are thereby coordinated to create what appears to be a single screen saving display.

Abstract: A driving circuit drives a display panel having a matrix of picture elements and electrodes. The driving circuit includes a memory storing compensation data for compensating for position-dependent brightness differences between the picture elements. The brightness differences are due to the stray resistance and capacitance of the picture elements and electrodes. A correction circuit modifies image data according to the compensation data to generate control signals, which are used to control drivers that drive the picture elements via the electrodes. The modified image data produce a display with an even average brightness over the entire display panel.

Abstract: Disclosed is a drive circuit for a panel display device for driving light-emitting devices arranged at respective intersections between a plurality of data lines and a plurality of scan lines. This drive circuit includes a voltage control circuit for charging the light-emitting devices to a voltage necessary for light emission by connecting the data lines to a predetermined power supply potential in a rising period prior to a period for selectively causing the light-emitting devices to emit light; and a drive control circuit for selectively connecting the data lines to a constant current source after the rising period.

Abstract: The object of the invention is elimination of an occurrence of instantaneous light in the center part of a display, a border between the upper half and the lower half of the display. An scanning method of the display, dividing the display panel to a first filed and a second filed, starts a counter therein, synchronized with the timing of driving a first row electrode of the first filed thereof, and drives a first row electrode of the second filed thereof, every time the counter value changes.

Abstract: A receiver includes a channel-matched-filter for outputting a Rake-combining result from a digital spread spectrum signal; a carrier recovery circuit which removes an offset of a carrier wave from the combining result; a correlation circuit which detects correlation; a symbol timing detection circuit which extracts a symbol from the correlation; a symbol determination circuit which regenerates data from the symbol; a framer circuit which discriminates a frame configuration; and a symbol timing recovery circuit which generates a timing phase for each of symbol timings. The channel-matched-filter performs multi-phasing compensation and, in accordance with a timing phase from the symbol timing recovery circuit, performs synchronization tracking.

Abstract: Clock switching circuitry includes a memory having a plurality of storage locations of a particular address each and configured to allow data to be written in and read out at the same time. The circuitry further includes a write pointer, a read pointer, a synchronizing circuit, a conflict detector, and a conflict avoiding circuit. The circuitry detects a conflict with high reliability and facilitates design using a CAD (Computer Aided Design) tool.

Abstract: Clock switching circuitry includes a memory having a plurality of storage locations of a particular address each and configured to allow data to be written in and read out at the same time. The circuitry further includes a write pointer, a read pointer, a synchronizing circuit, a conflict detector, and a conflict avoiding circuit. The circuitry detects a conflict with high reliability and facilitates design using a CAD (Computer Aided Design) tool.

Abstract: A circuit for detecting abnormality of a subject clock signal, includes a frequency dividing circuit for frequency-dividing a monitoring clock signal to provide a frequency-divided monitoring clock signal; a shift register which stores the frequency-divided monitoring clock signal in synchronization with the subject clock signal; and a plurality of abnormality evaluation circuits. The abnormality evaluation circuits operate complementarily each other in accordance with an output signal of the shift register and detect abnormality of the subject clock signal for a period of time corresponding to the cycle of the monitoring clock signal.

Abstract: A circuit for detecting abnormality of a subject clock signal, includes a frequency dividing circuit for frequency-dividing a monitoring clock signal to provide a frequency-divided monitoring clock signal; a shift register which stores the frequency-divided monitoring clock signal in synchronization with the subject clock signal; and a plurality of abnormality evaluation circuits. The abnormality evaluation circuits operate complementarily each other in accordance with an output signal of the shift register and detect abnormality of the subject clock signal for a period of time corresponding to the cycle of the monitoring clock signal.

Abstract: The present invention provides a method for forming a metal image in which a resist film is provided at an image portion and then etching processing is performed to thereby form the metal image comprising the steps of: (1) forming an image comprised of concave surface portions on a metal surface; (2) forming a resist film on the metal surface; and (3) exposing the resist film to such an extent that at the concave portions of the resist film is not made wholly soluble.