JPH0455887A - Display device - Google Patents

Abstract

PURPOSE:To rapidly display many pieces of information with natural displaying by displaying the image after movement by a 2nd image display means after the driving to picture elements arranged in the 1st direction of a 1st image display means is successively executed one round. CONSTITUTION:The 1st image display means 6 constituted by arranging plural picture elements in the form of the matrix by the lines of the 1st arranging direction and the rows of the 2nd arranging direction, the similar 2nd display means 7 provided adjacent to the 2nd arranging direction with respect to the 1st image display means 6, and the 1st, 2nd driving means 8, 9 which repeat the successive driving of the picture elements of the 1st, 2nd image display means 6, 7 in the 2nd direction by each line are provided. The displaying by the 2nd driving means 9 of the 2nd display image means 7 is executed after one period of the repetitive driving by the 1st driving means 8 of the 1st image display means 6 ends. The images are made invisible by deviation even if the scrolling to move the images displayed by the plural matrix display means 6, 7 is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an apparatus for displaying characters, images, etc., which are letters, symbols, or figures, using picture elements arranged in a matrix.

2. Description of the Related Art FIG. 9 shows the appearance of a conventional display device 51, and FIG. 10 shows its configuration. Such a display device 51 is used for displaying destinations inside stations, various advertisements, and the like. Display device 5
1 is a display section 53 having a display section 53 that displays characters and images input from an input section 52 of a personal computer or the like and scrolls displayed images.
The characters and images in are light-emitting diodes (abbreviated as LED).
It is displayed on a display panel etc. in which picture elements such as are arranged in a matrix. These display panels are, for example, 411
16 lines, k! It includes 16 columns of light emitting diode matrices, which are combined to form a display screen.

Each display panel includes electrical circuitry for driving a light emitting diode matrix. The combination of display panels is
This is done by arranging multiple display panels horizontally and vertically. Image data corresponding to the image to be displayed by the display section 53 is created from the input data from the input section 52 in the M control #54. Control unit 54
are rows 53a to 53f of display panels arranged in the horizontal direction.
The created WIi image data is applied to an output section 55 constituted by drive circuits 55a to 55f provided for each. The output section 55 has a memory for storing image data given from the control section 54, and derives a signal for driving the light emitting diode matrix of the display section 53 row by row. One display panel has 16 lines, i.e. 16 from l line.
It consists of up to the line. Driving per row is 16 lines,
It is assumed that the 15th line is performed sequentially, and after the 1st line, it returns to the 16th line. Images are displayed by such so-called dynamic driving. When moving the displayed image, image data corresponding to the moved image is created by the control unit 54, provided to the output unit 55, and displayed by driving the display unit 53.

FIG. 11 is a flowchart for explaining the operation of scrolling, which is the movement of images. II
The J phloem 54 determines the presence or absence of input data from the input unit 52 in step n1.

When there is input data, the process moves to step n2 to process the input data and create corresponding image data.

When the processing of input data in step n2 is completed, or when there is no input data in step n1,
Move to step n3. In step n3, a flag (hereinafter, scroll F
) is set to 1. When scroll F is set to 1, a process of shifting the image by one pixel in the row direction is performed in step n4. When the scroll processing in step n4 is completed, or when scroll F is not set to 1 in step n3, the process moves to step n1, and the processing up to step n4 is repeated.

Problems to be Solved by the Invention In the conventional display device 51, when scrolling an image, the control section 54 creates image data in which the image is shifted by one pixel in the row direction, and provides it to the output section 55. The output section 55 outputs the display section 53 according to the given image data.
is driven, and an image shifted by one pixel in the row direction is displayed on the display section 53. When scrolling continues, this kind of operation is repeated.

Such a display unit [51] needs to display a lot of information and attract the attention of people around it by scrolling and displaying images. Furthermore, it is necessary to display an image that can be viewed over a wide range by displaying an image with a large display area.

In the conventional display device 51, an image with a large display area is displayed by increasing the area of one picture element or by using a display panel that uses many picture elements. However, if one pixel is made larger, the image will be displayed rougher, making it difficult to see. Furthermore, in a display panel that uses a large number of picture elements, when each picture element is dynamically driven, the driving time of each picture element becomes shorter, resulting in a reduction in the brightness and contrast of the image.

The inventor of the present invention has proposed a configuration in which images are displayed using a plurality of display panels. However, even when an image is displayed on a plurality of display panels connected in a column direction, a problem arises if image data for displaying an image shifted by one pixel in a row direction is simultaneously applied to each display panel. That is, when one image or character is displayed by a plurality of vertically adjacent display panels, problems as shown in FIGS. 12 and 13 occur.

FIG. 12 shows a display state when a linear image displayed by 32 vertical lines is scrolled leftward by one pixel. These 32 lines are displayed by two 16-line display panels, and the display on each display panel is sequentially switched from 16 lines to 1 line. A cycle for one screen display is completed by driving every 16 lines. FIG. 12(1) shows the display state in 1/16 cycle. Figure 12 (2) to Figure 12 (6) are 3
The display states corresponding to each of /16 cycles to 11/1.6 cycles are shown. In line-by-line dynamic driving, only the row being driven is actually displayed, and that row appears to be displayed due to the afterglow phenomenon of light emitting diodes or the afterimage phenomenon of the human eye.

The longer the time since the actual display, the lighter the display becomes, so the image display can be considered to be a wedge-shaped image with scrolling taken into consideration, as shown in FIG. Therefore, a problem arises in which display is discontinuous between the 16th line and the 17th line. For this reason, the first
As shown in Figure 3, the image being scrolled becomes an unnatural image.

An object of the present invention is to provide a display device that can prevent images from shifting even when scrolling is performed to move images displayed by a plurality of matrix display means.

Means for Solving Glaring The present invention provides a method in which a plurality of picture elements are arranged in rows in the 1'-th arrangement direction and
a first image display means arranged in a matrix with columns in a second arrangement direction different from the arrangement direction of the first image display means; and a first image display means arranged adjacent to the first image display means in a second arrangement direction. , a second image display means comprising a plurality of picture elements arranged in a matrix with rows in a first arrangement direction and columns in a second arrangement direction; and picture elements of the first image display means. a first driving means that repeatedly drives the picture elements of the second image display means sequentially in the second direction row by row; a second driving means that repeatedly performs the above operations; and a second driving means that applies image data corresponding to images to be displayed by the first and second image display means to the first and second driving means, and displays the image in the first direction. When moving the image data to the first image display means, the moved image data to be displayed by the first image display means is given to the first drive means, and after one cycle of the repetitive driving for each row is completed, the image data is displayed by the second image display means. The display device is characterized in that the image data after being shifted is given to the second driving means.

According to the present invention, the first and second image display means in which a plurality of picture elements are arranged in a matrix with rows in the first arrangement direction and columns in the second arrangement direction are arranged in the second arrangement direction. are provided adjacent to each other in the direction. When moving the images displayed by the first and second image display means in the first direction, the moved images are displayed by the first image display means and then displayed by the second image display means. In each image display means, each picture element in the first arrangement direction is driven. Driving of each picture element in the first arrangement direction is performed sequentially in the second arrangement direction.

Therefore, the images displayed by the first image display means and the second image display means are sequentially arranged in the second arrangement direction from the image displayed by the first image display means to the image displayed by the second image display means. It looks like it's moving.

Embodiment FIG. 1 is a block diagram showing the configuration of an image display device 1 according to an embodiment of the present invention.1 The image display device 1 receives input data input to an input unit 2 composed of a personal computer or the like. , a display section 3 constituted by a dot matrix display panel in which dot-shaped picture elements such as light emitting diodes are arranged in a matrix. Input data from the input unit 2 is given to the control unit 4,
Image data that can be displayed as an image on the display unit 3 is created. The image data created by the control section 4 is given to the output section 5.

The output section 5 includes first and second output circuits 8.9 for respectively driving the first and first display panels 6.7 forming the display section 3. Each output circuit 8゜9 includes a control section 4.
A memory is included for storing image data provided from the memory, sequentially reading it out, and displaying it on the display panel 6.7. The control unit 4 includes a central processing unit (sometimes abbreviated as rcPUJ) such as a microcomputer.

) and the main control port FI! Random access memory (hereinafter abbreviated as rRAMJ) 11 used as a working area etc. when performing various processes of 410,
The control unit 4 also includes a programmable read-only memory (rPROMJ hereinafter) 12 that stores a program for operating the main control port B10. The PROM 12 includes a scroll section 13 that stores a scrolling program for horizontally moving the image display on the display section 3, and a scroll section 13 that stores images to be displayed on the first and second display panels 6.7 of the display section 3. A double-width scroll section 14 is provided that stores a program for scrolling. When performing scrolling, the main control circuit 10 simultaneously supplies image data for displaying a moving image to the first and second output circuits &88.9. When performing double-width scrolling, the image after movement is
The output circuit 8 is first supplied with the image data, and after the first display panel 6 displays the moved image, the second output circuit is supplied with image data for displaying the image.

FIG. 2 is a block diagram showing the configuration of the control section 4. As shown in FIG. In the control unit 4, R, AMll, and PROM 12 are connected to the main control circuit CPU10 via a bus circuit 15, and further includes a serial input/output circuit (hereinafter abbreviated as rsIOJ) 16 and a parallel input/output circuit. (hereinafter abbreviated as "P■○") 17 and a driver circuit 18 are connected. 5
IO16 receives serial data from input section 2,
The data is derived as parallel data to the bus circuit &'815. P
4O10 provides a signal to the output section 5 via one line for switching the memory provided in the output section 5 according to the data set by the CPU10.

FIG. 3 is a block diagram showing the configuration of an output circuit 8.9 included in the output section 5. As shown in FIG. The first output circuit 8, which is the first driving means, and the second output circuit 9, which is the second driving means, have the same configuration.The six output circuits 8 and 9 are provided with first and second memories 21 and 22. , first and second switching circuits 23
．． 24 stores image data from the control unit 4;
Reading out stored contents for display is carried out in each memory 21.2.
This is done alternately for 2. Reading of stored contents from the memories 21 and 22 is performed using a read address generated by the address generation circuit 25. The output from the second switching circuit 24 is the parallel/serial conversion circuit 26.
is converted into serial data and provided to the display section 3. The display section 3 displays address signals LO to L3 generated from the address generation circuit 25, a load signal Load,
A clock signal CLK is applied.

FIG. 4 is a block diagram showing the structure of the display panels 6, 7, which are the first and second image display means, and FIG. 5 is an electric circuit diagram showing the structure of the LED matrix 226 of each display panel. The first and second display panels 6.7 each have light emitting diodes as picture elements, which are composed of 16 horizontal rows in the first arrangement direction and 16 vertical columns in the second arrangement direction. Basic panels 220-270 including a 16×16 LED matrix 226 are arranged in a horizontal direction. The first display panel 6 is configured by arranging basic panels 250 to 270 in the horizontal direction. The second display panel 7
Basic panels 220 to 2 arranged above the display panel 6
40. FIG. 5 shows the configuration of the LED matrix 226 included in the basic panels 220-270. The LED matrix 226 includes light emitting diodes DOO, DO! provided at the intersections of 16 rows AO to A15 and 16 columns CO to C15, respectively. It is composed of ,... Each basic unit 220 to 270 includes a shift drive circuit 136 that includes shift registers 221 and 222 for driving each column co to C15 of the LED matrix 226.
and a row drive circuit 22 for driving each row AO to A15.
9 is provided. In the row drive diagram 1229, the output section 6
In response to the address signal 10, each row AO to A15
are sequentially driven in the second arrangement direction, from A15 to AO. The address generation circuit 25 shown in FIG. 3 generates a signal each time the driving of the LED matrix 226 for each row is completed, and supplies the signal to the control section 4. The control unit 4 can know from this signal that one cycle of row-by-row driving has been completed. Of course, interrupt processing may be performed in response to this signal.6 FIG. 6 is a flowchart for explaining the scrolling operation in this embodiment. In step m1,
The main control circuit 10 determines the presence or absence of input data from the input section 2. If there is input data, the process moves to step m2 and the input data is processed. In step m2, image display data for displaying corresponding to the input data is created, and the memory 21.9 of the output circuit 8.9. ．． Store in 22. When scrolling, the RAM of the control unit 4
A scroll flag (hereinafter abbreviated as "scroll F") provided in II is set to 1, and when scrolling is completed, scroll F is reset to O. step m
When the input data processing in step 2 is completed, or when it is determined that there is no input data in step m1, the process moves to step m3. In step m3, it is determined whether the scroll is in the second cycle or more. Here, a cycle refers to one cycle of driving the 16 rows of the LED matrix 226 in each of the basic panels 220 to 270. If it is the second cycle or more since scrolling started in step m3, the process moves to step m4.

In step m4, the double-angle scroll F is set to 1 in the next cycle after the scroll F is set to 1. When step m4 is completed, step m3
If it is determined that the scrolling is not in the second cycle or higher, the process moves to step m5. In step m5, it is determined whether scroll F is set to 1 or not. When scroll F is set to 1, the process moves to step m6. In step m6, a scroll process is performed, and image data is created in which the images of each of the basic panels 250 to 270 configuring the first display panel 6 in the lower stage are shifted by one column, and is provided to the first display panel 6. . When step m6 is completed, or step m
If it is determined in step 5 that scroll F is not set to 1, the process moves to step m7. In step m7, it is determined whether the double-angle scroll F is set to 1. If the 0-times scroll F is set to 1, the process moves to step m8.

In step m8, double-width scroll processing is performed to create image data in which the image data corresponding to the image displayed by the second display panel 7 at the upper stage is shifted by one column, and the second display panel 7 given to. When the double-width scroll processing in step m8 is completed, or when it is determined in step m7 that double-width scroll F is not set, the process returns to step m1. Such operations are repeated and images are displayed on the display section 3.

FIG. 7 is a diagram showing a state of horizontal scrolling in a straight line having a length of 32 lines according to the embodiment shown in the first figure.

Figure 7 (1) is a 1/16 cycle, Figure 7 (2) is a 3/16 cycle.
16 cycles, Figure 7 (3> is 5/16 cycles, 7th
Figure (4) shows the 7/16 cycle, Figure 7 (5) shows the 9/16 cycle.
The cycle and FIG. 7(6) respectively show how the image looks in the 11/16 cycle. The upper stage display on the second display panel 7 is delayed by one cycle compared to the lower stage display on the first display panel 6.
The moving image is displayed without creating a step between the 16th line and the 17th line, which are the boundaries of the display panel 6.7.

FIG. 8 is a waveform diagram showing signals applied from the output circuit 8.9 to the display panel 6.7. Figure 8 (1) to (4)
represents an address signal for driving the LED matrix 226 for each row AO to A15. By this address signal, the rows of the LED matrix are sequentially driven from line 16 to line 1. FIG. 8(1) shows image data for displaying one line of the LED matrix 226. The image data is stored in each basic unit 220 to 270.
The shift register 22 of the shift drive circuit 236 included in
1,222, and are sequentially transferred. The shift drive circuits 236 of each of the basic units 220 to 270 are connected in series, and image data is transferred in synchronization with the clock signal CLK derived from the address generation circuit 25. When data has been derived for all shift drive circuits 137, the address generation circuit 25 outputs the load signal L.
oad, and each shift drive circuit 236 responds to this load signal Load to shift registers 221 and 22.
2, the image data from LED matrix 22 is latched.
6 to display the image.

In the above embodiments, a dot matrix display panel using LEDs is used, but it goes without saying that a liquid crystal display element or the like may also be used. Also, L.E.
Although the D matrix is composed of a dot matrix with 16 horizontal rows and 16 vertical columns, it goes without saying that means for displaying dot matrices having other sizes and shapes may be used.

Moreover, although the plurality of display means are represented by the first and second two, it is of course possible to use another number.

Effects of the Invention As described above, according to the present invention, when the images displayed by the first and second image display means provided adjacent to each other in the second arrangement direction are moved in the first arrangement direction, the first image The image to be displayed by the display means is moved first, and
The picture elements arranged in the first direction of the image display means are sequentially driven, and after one cycle, the second image display means displays the moved image. When displaying, the image will not be discontinuous between the first display means and the second display means.

Since images are displayed using a plurality of image display means and do not look unnatural even when the images are scrolled, a large amount of information can be displayed quickly.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a block diagram of an embodiment of the present invention.
Block diagram showing the configuration of the control unit 4 of the illustrated embodiment, No. 3
The figure is a block diagram showing the configuration of the output section of the embodiment shown in the first figure, FIG. 4 is a block diagram showing the structure of the display panel of the display unit 3 of the embodiment shown in the first figure, and FIG. An electric circuit diagram showing the configuration of the LED matrix, FIG. 6 is a flowchart for explaining the operation of the control unit 4 in the embodiment shown in FIG. 1, and FIG. 7 is a waveform showing the signal given to the display panel in FIG. 4. 8 is a diagram for explaining the scroll display according to the embodiment shown in FIG. 1, FIG. 9 is a perspective view showing a conventional display device 51, and FIG. 1O is a diagram showing a conventional display device F51. FIG. 11 is a flowchart for explaining the operation of the conventional display device 51, FIG. 12 is a diagram for explaining the display during scrolling in the conventional display device 51, and FIG. 13 is a block diagram showing the configuration. 1 is a diagram for explaining a problem during double-width scroll display in a conventional display device 51. FIG. 1. Display device, 2. Input section, 3. Display section, 4. Control section, 5.. Output section, 6. 1st display panel, 7. 2nd display panel, 8.. 1st output circuit. , 9... second output circuit,
10...Main control circuit, 11...RAM, 12...P
ROM, 13...Scroll section, 14...Double-width scroll section, 15...Bus circuit, 16...Serial input/output circuit, 17...Parallel input/output circuit, 18...Driver circuit, 20... external bus, 21...first memory;
22... Second memory, 23... First switching circuit, 2
4 second switching circuit, 25...address generation circuit, 220
~270...Basic panel, 221,222/Shift register, 223.224 Latch, 226...L
ED matrix, 229... Row drive circuit agent Patent attorney Number of strokes Keiichi O C1 Figure Figure Section

Claims (1)

[Scope of Claims] A first device comprising a plurality of picture elements arranged in a matrix with rows in a first arrangement direction and columns in a second arrangement direction different from the first arrangement direction. an image display means provided adjacent to the first image display means in a second arrangement direction, wherein a plurality of picture elements are arranged in rows in the first arrangement direction and columns in the second arrangement direction; A first drive that repeatedly drives picture elements of the second image display means arranged in a matrix and the picture elements of the first image display means in the second direction row by row. means; a second driving means for repeatedly driving picture elements of the second image display means in the second direction row by row; When moving the image in the first direction by applying image data corresponding to an image to be displayed to the first and second driving means, and moving the image in the first direction, the moved image data to be displayed by the first image display means is transmitted to the first and second driving means. The moving image data to be displayed by the second image display means is applied to the first driving means, and after one cycle of the repetitive driving for each row is completed, the moved image data to be displayed by the second image display means is applied to the second driving means. Display device.