JPS61238089A - Multiwindow controller - 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 Industrial Application] The present invention relates to a multi-window control device that realizes a function of displaying a plurality of images on a display terminal, that is, a multi-window function.

[Conventional technology]

A conventional device of this type has a configuration shown in FIG. In the figure, 1, 2, 3. 4 are memory planes as image memory, 5, 6, 7° 8 are gate circuits, 9 are
is an output signal control circuit, 10 is an output circuit, 11 is a CPU,
14 is a gate signal control circuit, and each memory plane 1
, 2, 3.4, only the image information corresponding to the gate circuit opened by the gate signal from the gate signal control circuit 14 is sent to the display (not shown) via the output signal control circuit 9 and the output circuit 10. It is now output to the terminal.

In the conventional device configured as described above, multi-window control was realized by hardware and software. That is, in the configuration shown in FIG. 3, in order to display a certain dot on a display (not shown), the software shown in the flowchart in FIG. 4 first selects a memory plane that outputs image information on the display ( After performing processing such as step 1) and sending this brain number to the gate signal control circuit 14 (step 2), the gate signal control circuit 14 outputs a gate signal to the gate circuit of the corresponding memory brain. , the gate circuit becomes open,
A series of processing is performed in which the image information on the memory is sent to the output circuit 10 via the output signal control circuit 9, and then turned into a video signal and sent to the display terminal.

[Problem that the invention seeks to solve]

However, according to the above-described prior art, each time one dot is output on a display terminal, an overhead is added due to software processing equivalent to the processing shown in FIG. 4, making it difficult to perform high-speed multi-window display.

The present invention was made to solve such problems,
To enable high-speed multi-window display by eliminating software processing. The object is to provide a multi-window control device.

[Means for solving problems]

A multi-window control device according to the present invention includes a window control storage means for storing control information indicating a correspondence relationship between an image position on the same screen and an image memory, and a window control storage means for reading out the control information from the storage means to control the window control information. and gate signal control means for outputting a gate signal corresponding to the information to the gate circuit.

[Effect]

In the present invention, the gate signal control means outputs a gate signal corresponding to the control information stored in the window control storage means, and the gate circuit opens and closes in accordance with the control information.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, 1.2.3.4 is the memory plane, 5, 6
, 7.8 are gate circuits, 9 is an output signal control circuit, 10 is an output circuit, and 11 is a CPU, which are similar to those of the prior art shown in FIG. On the other hand, 12 is a memory for window control, and 13 is a gate signal control circuit. constituting a control storage means;
Further, the gate signal control circuit 13 reads the control information from the storage means, that is, the window control memory 12, and sends the gate signal corresponding to this control information to the gate circuits 5 to 5.
8 constitutes gate signal control means. Note that this figure shows an example in which there are four memory planes.

Next, the operation will be explained. In order to display a certain dot on the display terminal in the above configuration,
The gate signal control circuit 13 reads control information on which memory plane is to be output from the window control memory 12, and outputs a gate signal to the gate circuit corresponding to this control information, thereby making the gate circuit open. Then, the image information on the corresponding memory brain is sent to the output circuit 10 via the output signal control circuit 9.

FIG. 2 shows a configuration example of the window control memo U 12 when 1 is the memory plane O 12, memory plane 1.3 is memory plane 2.4, and memory plane 3 is the memory plane 3 in FIG. FIG. 2 shows which memory plane's image information is output to a dot on the display. For example, information on memory plane O is displayed for a dot that is 0.

When executing the series of processes described above, software processing in the prior art as shown in FIG. 4 is not involved, so there is no overhead caused by it, and high-speed multi-window display is possible.

In the above embodiment, the case where there are four memory planes is shown, but the present invention can be applied to a case where there are more or less memory planes.

Furthermore, in the above embodiment, the control information on the window control memory 12 is set in units of dots on the display terminal, but it is also possible to configure a configuration in which several dots are controlled at once, or a configuration in which the display is controlled in units of areas. It is. Further, in the above embodiment, the memory plane number is stored as control information on the window control memory 12, but it can also be implemented in other formats such as a bit pattern format or a code format.

〔Effect of the invention〕

As explained above, the multi-window control device according to the present invention includes a window control storage means for storing control information indicating the correspondence between an image position on the same screen and an image memory, and a window control storage means for storing control information indicating a correspondence relationship between an image position on the same screen and an image memory; and gate signal control means for reading the control information and outputting a gate signal corresponding to this control information to the gate circuit, and opening and closing the gate circuit based on the control information, so that overhead due to software processing is not added. Without,
This has the effect of enabling high-speed multi-window display.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a device according to an embodiment of the present invention, FIG. 2 is an explanatory diagram showing an example of the configuration of a window control memory in the above embodiment, FIG. 3 is a configuration diagram of a conventional device, and FIG. 3 is a flowchart showing multi-window software processing in a conventional configuration. 1-4... Image memory, 5-8... Gate circuit, 12... Window control storage means, 13... Gate signal control means. Note that the same reference numerals are used for the middle part of the figure or corresponding parts. Agent Masuo Oone (and 2 others) Figure 2, 12 No. 4 [Procedural amendment (voluntary) Commissioner of the Japan Patent Office
Wl, Indication of the case Japanese Patent Application No. 60-79510 2, Title of the invention Multi-window control device 3, Person making the amendment 5, Detailed description of the invention to be amended, Brief description of the drawings, Drawing column. 6. Contents of amendment (1) Page 3, line 18 of the specification [Window display is enabled. J means "enables window display.
” he corrected. (2) In the same book, page 8, line 6, replace “Image memory” with “
``Memory Plane''. (3) On page 8, line 7 of the same book, the phrase "memory means for window control" is corrected to "memory for window control." (4) In the 8th line of page 8 of the same book, the phrase "-to signal control means" is corrected to read "-to signal control circuit." (5) The drawings and Figures 1 to 4 shall be corrected as shown in the attached sheet. Above are Figures 1 and 2. Figure 3

Claims (1)

[Claims] In a multi-window control device that is equipped with a gate circuit that selects image information to be output to a display from multiple image memories and can display multiple images on the same screen,
A window control storage means for storing control information indicating the correspondence between image positions on the same screen and image memory; and a window control storage means for reading the control information from the storage means and transmitting a gate signal corresponding to the control information to the gate circuit. A multi-window control device comprising gate signal control means for outputting a gate signal to a multi-window control device, the gate circuit being opened and closed based on the control information.