JPH0799454B2 - Display controller for Dot Tomato Rix type display - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a dot-matrix desfray display driving device which drives and controls a large number of display elements arranged in a matrix in a static display system, and interrupts a part of the display screen. The present invention relates to a display control device for performing sub display.

<Prior Art> Such a display is provided with a display register or memory having a bit corresponding to each display element in a one-to-one correspondence, and when a row content of the display register is shifted at a constant speed, a flow display, a display register It is possible to perform a static display when holding the contents, and an animation (moving image) display when shifting the contents of the display register at a very high speed in a constant cycle. However, only one series of display contents can be displayed on one display, and a plurality of displays are arranged in parallel to display information of different series.

<Object of the Invention> An object of the present invention is to provide a display control device capable of sub-displaying other different information by intermittently switching and displaying a part of one display while using one display. is there.

<Structure of the Invention> A display control method of a dot matrix type display according to the present invention includes a display panel in which a large number of display elements are arranged in a matrix and a plurality of register units each having a predetermined number of bits. Are arranged in a matrix so as to correspond to the respective display elements, and display registers in which the same rows of the register units are horizontally connected to each other, and the main display data displayed by the display registers. A main data memory for storing the main display data, a control unit for introducing the main display data into the display register for each row, and for sequentially shifting the main display data with respect to each register unit in the row direction by a shift pulse; At least one register unit at each final stage in the shift direction in each row of the display register Display switching means provided between one of the register units and the register unit of the preceding stage, a sub data memory for storing sub display data different from the main display data, and the display switching means are optional. Interrupt display control means for controlling the sub display data to be supplied to the register unit at the final stage through the display switching means by switching for a fixed time at the timing.

<Example> Hereinafter, an example of the present invention will be described for a display using an electrostatic display element.

Here, the electrostatic display element means a fixed electrode, a movable electrode that can be attracted to or separated from the fixed electrode surface, and a dielectric provided on either or both of the fixed electrode surface and the movable electrode surface. A layer and a lead wire for applying a voltage between the fixed electrode and the movable electrode, and the appearance of the movable electrode being electrostatically attracted to the surface of the fixed electrode by the application of the voltage. , The fixed electrode surface and the dielectric layer can be formed in arbitrary colors, large ones can be easily manufactured, and power consumption during connection of voltage application. It has the characteristic that there is almost no.

FIG. 1 shows the circuit configuration of the entire apparatus. The display unit 1 includes a large number of electrostatic display elements U arranged in a matrix on one panel, and the number of units is, for example, 20 × 200.
It is a dot. The drive circuit unit 2 is composed of a large number of thyristors corresponding to the display elements U of the display unit 1 in a one-to-one correspondence. The display register 3 is composed of a matrix-structured shift register that shifts with a clock pulse CK, and each dot corresponds to each dot of the display unit 1. The main data memory 4 is a memory for storing character or pattern information to be displayed by the display unit 1, for example, display data of electronic news, advertisements, moving images and the like. The control unit 5 is provided with a clock pulse generator, sequentially reads out main memory data from the main data memory 4 and introduces it into the display register 3 for each row, and gives a shift pulse to the display register 3 to change the contents of the register in the row direction. Shift to. In the case of flow display such as lightning news, this shift pulse application system applies a predetermined medium-speed shift pulse continuously, and the display unit 1 follows each other and the display content flows, and a moving image is displayed. In the case of display, a high-speed shift pulse that cannot be followed by the movable electrodes of the display unit 1 and the stop of the shift are alternately executed, so that the display unit 1 changes the display content at predetermined intervals. There are various methods.

A portion 3B of the display register 3 is structurally provided in a divided state with respect to the main body portion 3A, the details of which will be described later with reference to FIG. The change-over switch 6 controls opening / closing so that either one of the main display data, the data portion to 3B, or the sub display data output from the sub data memory 7 is selectively introduced into the portion 3B. The change-over switch 6 is controlled by the output of the clock 8 so as to interrupt the contents of the sub-data memory 7 into the portion 3B intermittently every predetermined period, for example, every 60 seconds for 10 seconds. The contents of the sub-data memory 7 may be arbitrary data such as numerical data such as noise level, temperature, time, figures, product advertisements, etc., and can be used as the clock 8 especially at time.

FIG. 2 shows an embodiment of the essential part of the present invention. Display register 3
15 display register integrated circuits SR which are register units each having a predetermined bit are arranged in a matrix so that each bit corresponds to each display element U of the display unit 1 and each display is Of the register integrated circuits SR, those of the same row are connected to each other in a row. Then, as shown in the figure, the main display data is introduced into the display register 3 for each row, and the introduced main display data is sequentially shifted in the direction from the right side to the left side of each row by the shift pulse. To go. Display register integrated circuit SR _{1 in} the last row of the bottom row
Corresponds to the above-mentioned part 3B, and is switched by the control signal from the clock 8 between the display register integrated circuit SR _{1 at} the final stage of this final row and the display register integrated circuit SR ₂ at the preceding stage adjacent thereto. Changeover switch SW that is controlled and interlocks with each other
₁ and SW ₂ are connected. When both changeover switches SW ₁ and SW ₂ are switched and connected in the opposite manner to that shown in the figure, the shift data of the preceding display register integrated circuit SR ₂ is transferred to the display register integrated circuit SR ₂ by inputting a shift pulse to the display register integrated circuit SR ₁ . Circuit S
It is input to R ₁ and only the main display data is displayed on the display unit 1 as shown in FIG.

On the other hand, when both changeover switches SW ₁ and SW ₂ are switched to the illustrated state for a certain period of time, the sub display pulse of the sub control unit 9 inputs the sub display data of the sub data memory 7 to the display register integrated circuit SR _1. As shown in FIG. 3B, the sub-display data is interrupt-displayed on a part of the display unit 1.
It goes without saying that in practical circuits, SW ₁ and SW ₂ are composed of electronic circuits.

As is apparent from this embodiment, the present invention has an advantage that it can be easily added to an existing display device and implemented.

Incidentally, in the above-mentioned embodiment, the case where the display register integrated circuit SR ₁ at the final stage in the last row of the display register 3 is used for the divided portion 3B to perform the interrupt display at the lower left corner of the display unit 1 has been described. Part 3B of any one of the display register integrated circuits SR of the respective final stages
It is also possible to perform interrupt display at a position such as the upper left corner or the middle left end of the display unit 1.

<Effects of the Invention> According to the present invention, other different information is intermittently displayed on a part of the display panel of the type driven by the static display method by a simple configuration in which the existing display register is modified or added. The display function of the display can be expanded.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG.
FIG. 3 is a circuit diagram showing an essential part of the drawing, and FIG. 3 is an explanatory view of the operation of the present invention. 1 …… Display unit (display panel) 3 …… Display register SR …… Register unit SR ₁ …… Final stage register unit SR ₂ …… Final stage front stage register unit 4 …… Main data memory 5 …… Control unit 6 ... Switching means 7 ... Sub data memory 8 ... Clock

Claims (1)

[Claims] 1. A display panel in which a large number of display elements are arranged in a matrix, and a plurality of register units each having a predetermined bit are arranged in a matrix so that each bit corresponds to each display element. Display registers arranged in a row and having the same row of each register unit connected to each other in a row, a main data memory for storing main display data to be displayed by the display register, and the main display data. A control unit for introducing each main display data into the display register for each row and sequentially shifting each main display data to each register unit in the row direction by a shift pulse, and a final stage in each shift direction in each row of the display register. At least one of the register units and the register unit of the preceding stage Display switching means provided between the sub display data and the sub display memory for storing sub display data different from the main display data, and the sub display data by switching the display switching means for a predetermined time at arbitrary timing. A display control device of a dot matrix type display, comprising: interrupt display control means for controlling to supply to the final stage register unit via the display switching means.