JPS62157091A - Dot matrix type display unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of the Invention) The present invention relates to a display memory that stores display information, a display memory that stores display information, and a predetermined number of pixels in order to display characters and figures, such as an outdoor free pattern display device. a dot matrix type display section having a lighting section; and a dot matrix type display section that writes display information into the display memory in response to a write control signal and reads display information stored in the display memory in response to a command signal to display the display section. The present invention relates to a dot matrix type display device equipped with a display control means for displaying information on a portion of the screen.

(Prior art and its problems) When displaying a blinking image in a conventional display device of this kind, generally, when display information read out from a display memory is scanned and displayed on a dot matrix type display section, Processing such as modulating the luminance signal of a predetermined part of the display information was performed.

However, in the case of a conventional example having such a configuration, there is a drawback that the configuration becomes complicated due to the luminance signal modulation, such as a modulation circuit and a dedicated control circuit therefor, and the device as a whole becomes large. As a result,
The disadvantage was that it was difficult to unitize the display section.

(Object of the Invention) The present invention has been made in view of the above circumstances, and it is possible to simplify the configuration for displaying blinking images, thereby making it possible to miniaturize the entire display device and to easily form the display section into a unit. The purpose is to do so. - (Structure and effect of the invention) In order to achieve such an object, the present invention provides the dot matrix type display device described at the beginning, in which the display memory stores memory data equivalent to the number of pixels of the display section in one bank. A plurality of banks are stored as a first bank and a second bank corresponding to each other, and the second bank is configured with a predetermined part of the lit parts of the first bank as a non-lit part. However, when displaying a blinking image, the first bank and the second bank are alternately read out at a set period in response to a command signal from the display control means.

According to this configuration, for example, if a certain row is taken out and explained, in the first bank, all of the rows are lit parts and r
l, 1. ..., 1. N, and in the second bank, rl, 1. ..., 1
．． OJ and the 1st bank and 2nd bank respectively.
By alternately reading out the banks and repeating the lit parts and non-lit parts, a predetermined part of the image can be displayed lit.

Therefore, the banks themselves stored in the display memory are modified to consist of a pair of first and second banks, and a blinking image is formed by reading them out alternately. Therefore, the blinking image can be created simply by software processing. can be formed,
It eliminates the need for special control circuits and modulation circuits for flashing.
It has become possible to downsize the display device as a whole, and at the same time, it has become possible to easily unitize the display section.

(Description of Examples) Hereinafter, the present invention will be described in detail based on examples shown in the drawings. FIG. 1 is a block diagram showing the configuration of a dot matrix type display device according to an embodiment of the present invention. In this figure, 1 is a display memory that stores display information, and 2 is a dot matrix type display section having a lighting section with a predetermined number of pixels. This display section 2 has X in the horizontal direction and y in the vertical direction.
pixels, and the number of pixels for one entire screen is XX7 (
Specifically, the display memory l has (16×16=256 pieces), and the display memory l has a capacity sufficient to store multiple banks of memory data equivalent to the entire screen. are doing.

3 is a display control section, 4 is a main control section, and the display control section 3 and the main control section 4 constitute a display control means 5,
Display information is written into the display memory l in response to a write control signal from the main control unit 4, and display information stored in the display memory l is read out in response to a command signal from the main control unit 4. It is configured to display display information on the display section 2.

As shown in the overall schematic side view of FIG. 2, the display section 2 is constructed by providing a display section printed circuit board 6 with light emitting diodes (LEDs) 7 as lighting sections corresponding to the number of pixels. There is. A printed circuit board 10 for a display control section and a printed circuit board II for a main control section are connected to the printed circuit board 6 for a display section via a printed circuit board 8 for coupling and a connector 9 . In the figure, 12 is a resistor array. Although not shown in the drawings, an I constituting the display memory I is provided on the display control section printed circuit board IO or the main control section printed circuit board 11.
C is provided.

In response to the command signal, the display control means 5 is configured to perform three types of display: a static continuous display, a blinking display, and a scroll display by reading a predetermined bank.The display operation will be described below. This will be explained in detail using the flowchart shown in FIG.

(i) After moving to the still continuous display display process, it is determined in step F1 that it is a still continuous display, and the process moves to step F2, where a predetermined image corresponding to the image is displayed as shown in FIG. Read out the stationary bank A in which the only lighting part is set (set to l), scan it, and perform step F1 and step F until the display format is switched or the display process is stopped.
2 is repeated to display still images continuously.

(11) Blinking display After determining in step Fl that the display is not continuous, it is determined in step F3 that the display is blinking, and the process moves to step F4, and as shown in FIG. 4(b), The first bank BI for blinking in which the location is set as the lighting location is read out and scanned, and in step F5, the flashing time is 0.5 seconds (s
ec) Repeat the operation until it is determined that the time has elapsed.

When 0.5 seconds have elapsed, the process moves to step F6, where the flashing bank B1 corresponds approximately to the first flashing bank B1 and sets only a predetermined part of the lighting parts to non-lighting parts (set to 0). 2 Read and scan bank B2, step F
This operation is repeated until it is determined in step 7 that 0.5 seconds have elapsed. Then, when 0.5 seconds have elapsed, Su-step F
1 and repeats the processing of step Fl and steps F3 to F7 until the display format is switched or the display process is stopped, and the first bank B1 for blinking and the second bank B2 for blinking are alternately displayed. The light is read out and scanned, and a lit portion and a non-lit portion are alternately repeated at a predetermined location r, and the predetermined location f is blinked.

(Mountain) Scroll display In step Fl, it is determined that the display is not continuous, and in step F3, it is determined that the display is not blinking. In step F8, it is determined that it is scroll display, and the process moves to step F9, as shown in FIG. As shown in (c), the first screen for scrolling sets the part corresponding to the image as the lit part.
Bank CI is read and scanned, and the operation is repeated until it is determined in step FIO that 1.0 seconds (Sec) has elapsed. When 1.0 seconds have elapsed, the process moves to step Fll, where the corresponding second scrolling bank C3 is read out and scanned with the entire illuminated area one step lower than the first scrolling bank CI, and in step F12, 1.
This operation is repeated until it is determined that 0 seconds have elapsed. 1
．． When 0 seconds have elapsed, the process moves to step P13, and the third bank C3 for scrolling, which has the entire illuminated area one step lower than the second bank C3 for scrolling, is read out and scanned,
This operation is repeated until it is determined in step F14 that 1.0 seconds have elapsed. Then, when 1.0 seconds have elapsed, the process returns to step F1, and steps F1 and F3 are continued until the display format is switched or the display process is stopped.
Also, step FB or step F! 4 is repeated, and the first scrolling bank C1, the second scrolling bank C7, and the third scrolling bank C3 are read out and scanned in that order repeatedly, and a scroll display is performed in which the predetermined image moves sequentially from the top to the bottom. Do the following. The scrolling direction can also be set to the left or right.

In addition, in FIG. 4, for convenience of explanation, the number of pixels is 15.
Shown individually.

The dot matrix type display device of the present invention can be applied to various display devices, such as a display device for displaying accident information and traffic jam conditions on expressways, and a display device for arrival and departure guidance at airports.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a dot matrix type display device according to an embodiment of the present invention, FIG. 2 is an overall schematic side view, FIG. 3 is a flowchart explaining the display operation, and FIG. It is an explanatory diagram of a bank. 1...Display memory, 2...Display section, 3...Display control means, 7...Light emitting diode as a lighting section.

Claims (1)

[Claims] (1) A display memory that stores display information; a dot matrix display section that has a lighting section with a predetermined number of pixels; and display control means for reading out display information stored in the display memory and displaying it on the display section, the display memory being a memory having a number of pixels equivalent to the number of pixels of the display section. A plurality of banks are stored with data as one bank, and in a first bank and a second bank that correspond to each other, a predetermined part of the lit parts of the first bank is set as a non-lit part and the data is stored as a non-lit part. A dot comprising two banks, and configured to read out the first bank and the second bank alternately at a set cycle in response to a command signal from the display control means when displaying a blinking image. Matrix type display device.