Character information to be displayed is stored in a temporary memory. Character data (ASCII code) is provided from the temporary memory to a character generator. The character generator is responsive to the character data to convert them into a dot display signal displaying each character in m columns and n rows. Then the display signal of each common row of the respective characters is transferred to a shift register in a bit serial fashion. Each time the display signal for one character is transferred a display blank signal is loaded in the shift register. A dot matrix display comprises rows of the same number as the cells of the shift register for producing a blank of one column between the adjacent characters, while displaying each character in m columns and n rows. After display is made on the display for all the rows, a leftward shift is made in succession one column by one column from the lowest row. When the shift amount comes to correspond to one character, new character information is loaded in the temporary memory.
A display system is disclosed for depicting a moving image of a graphic representation of a sequence of, for example, letters, words, symbols or artwork. The system comprises a display area defined by an array of light emitting diodes (LED's) which form a matrix having a series of rows and columns. The LED's are arranged in rows parallel to the intended direction of movement of an image and the columns are arranged orthogonal to the intended direction of movement. The LED's are further arranged in first and second groups in an interlacing fashion, wherein successive LED's of the first and second groups are spaced apart by one or more columns which do not contain LED's. A controller is further included for generating a plurality of electrical signals in sequential groups, each such group of signals representing encoded data of a sample portion of the graphic to be represented by one column of the matrix at a prescribed instant, and successive groups of the sets of data providing further encoded data of successive sample portions of the graphic to be represented by a column and successive prescribed instants. The system is capable of displaying high-definition graphics with only a fraction of the picture elements necessary in prior art systems, and yet which produces an image that does not tend to break up into momentary fragments, jitter, or wobble.
The present invention is to provide a dot matrix type display device by self light emitting elements in which a display burning phenomenon can be prevented from occurring. With the dot matrix type display device according to the present invention, in the display device in which a plurality of self light emitting elements are arranged in a dot matrix pattern, one or more icons, pictures, letters/characters, and the like are displayed at least on a part of a display area of the display device. The display origin of said one or more icons, pictures, letters/characters, and the like are moved at least one dot or more and displayed by movement display means one after another.
A bar code display apparatus includes a time-varying nonpredictable code generator (12) and a display device (14) responsive to the time-varying nonpredictable code generator (12) to display a time-varying nonpredictable bar code. The display device can provide a scrolling display by displaying a subsequent bar code portion having a bar removed from an end of the bar code. Alternatively, the display device can display a pulsed signal corresponding to the bar code. A housing, having an inset portion at which the display device is accessible, can support the time-varying nonpredictable code generator and the display device.
A pager for alerting the user and dispalying received message data when the received ID code agrees with the ID code of the pager, includes: a dot matrix display, having dot matrix of a.times.b, for displaying the message data; a detector for detecting a total length of the message data when the message data is displayed on the dot matrix display and whether or not the total length is larger than the a; and a display control portion for displaying a portion of the message data on the dot matrix display with the displayed message data scrolled by a predetermined number of dots every predetermined interval in the direction defined by the a when the size is larger than the a. The predetermined number and interval are stored in memory and can be changed according to an operation of a key switch or a detected control code, the control code being further included in the pager signal. The message is scrolled in either the forward or the reverse horizontal direction in response to key switches and the scrolled speed, i.e., pitch of dots and the scroll interval, can be changed. The pager further includes a character ROM for generating character image data according to the received message data. The total length of the message is detected by detecting the number of the message data or the character image data.
To provide an inexpensive test apparatus for testing the performance of control computers in automotive vehicles, for example sufficiently simple to be affordable by gasoline service stations, small garages and the like, a shift register-memory combination unit is provided receiving the data in serial, preferably Pulse-Duration-Modulated (PDM), form, and a monostable flip-flop is connected to the shift register, connected to be SET by a flank, preferably the trailing flank, of the first bit of a data word, and having a timing period somewhat longer than the longest interval between sequential bits, the monostable flip-flop being connected to control the shift register to transfer data in the shift register to a memory section thereof for simultaneous display of the data in the various storage locations of the memory section of the shift register. A counter can be used to inhibit application of clock pulses to the shift register beyond a predetermined count so that only those data which have been transmitted up to the inhibit count will be stored in the shift register for subsequent display.
