JPS6314193A - Image display system - 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] (Summary) The present invention is a method for rewriting a display image on a display device,
In order to eliminate the image disturbance that occurs when the display color of an image being displayed is rewritten, a method is described in which a RAM array for blinking is used for writing, and after writing is completed, the display is switched and displayed.

[Industrial application field]

The present invention relates to a method for eliminating image disturbances that occur when rewriting image information being displayed on a display device.
More specifically, when changing the color of the image being displayed, the system uses the RAM array attached for blinking and switches the display after writing is completed, thereby eliminating image disturbances. be.

Color display devices used to display graphics and images are equipped with various functions so that they can be used by an unspecified number of users. Typical examples that have become popular include functions such as multi-screen and double-buffer systems.

These functions consist of a configuration in which several sets of RAM plays called frame buffers are attached, and writing and display control M is performed.

For example, in the multi-screen method, a specific figure is written on the main screen, the same figure is written in a different color on a printer screen different from the main screen, and the display is controlled on/off to alternate There is a method for displaying and highlighting. This readout control method is called a "printer".

This blinking method is such that data is written in advance on the main screen and the blinking screen prior to display, and then dynamic display is activated.

However, in color display devices used for examining colors and color schemes in art fields such as graph ink design and interior design, or clothing designs in the apparel industry, color data is often written in afterwards.

In such cases, a method is adopted in which the color content (color code) written in the frame buffer being displayed is directly rewritten, and during this time, the image on the display screen is distorted.

Therefore, there is a strong demand for a method that does not cause screen disturbances while rewriting color contents.

[Conventional technology]

FIG. 3 is an explanatory diagram of the conventional method. In the figure, 31 is a blink RAM array that stores blink data 3B, and 32 is a frame buffer RAM array that stores normal image data 3B.

These RAM arrays are provided for the purpose of independent functions, and when rewriting the color content of the image on the display screen 35, they are operated in parallel with the operation of the readout control circuit 34 for display. Therefore, a method is adopted in which the frame buffer 32 is rewritten and the color contents are changed.

[Problem that the invention seeks to solve]

Therefore, if rewriting is performed while frame buffer read control is being performed, the displayed image will be disrupted, and this may cause the image to be corrupted, such as when considering color schemes in art work. It is particularly avoided on the grounds that it is dangerous.

The present invention was created in view of these points.
Without disturbing the displayed image due to minor modification of the display device,
The purpose is to provide a rewriting method.

[Means for solving problems]

FIG. 1 is a block diagram showing the principle of the image display method of the present invention. In FIG. 1, 1 is a RAM array constituting a frame buffer for blinking, and 2 is a frame buffer in which data for graphics to be displayed on a display device is stored.

3 is RAM array 1 for blinking, and auxiliary frame
This is a RAM play switching circuit that can be switched when diverted to a buffer.

4 is a readout control circuit for the frame buffer 2 and the RAM array 1 for blinking, 5 is a display screen, A is the image data, and B is a diagram showing the human power of the blinking data.

With this configuration, the RAM array, which was conventionally used only for the single purpose of blinking, is improved so that it can be used for multiple purposes.

[Effect]

When rewriting the image data being displayed on the display device and changing the color of the displayed image, the RAM array switching circuit is switched, the RAM array for blinking is diverted to a frame buffer, and data is written.

When the data has been rewritten, the read control circuit instantly switches the frame buffer in which the image data currently being displayed is stored, and replaces the displayed image with new data.

This eliminates the disturbance of the displayed image that occurs during rewriting, and eliminates the drawback of spoiling the image of the user who is considering the color scheme.

〔Example〕 FIG. 2 is an explanatory diagram of one embodiment of the present invention.

In FIG. 2, reference numeral 21 denotes a blinking RAM array constituting a blinking screen attached for blinking.

22 is a frame buffer in which image data to be displayed is stored, and 23 is a circuit for switching the RAM array for the printer.

Reference numeral 26 denotes a blinking RAM array 21 and a color map addressed by the letter contents (color code) read out from the frame buffer 22 by the readout control circuit 24, and is composed of a RAM array. This is a feature also called a color lookup table.

27 is a video interface, 25 is a display screen, 2
8 is a screen selection circuit, 29 is a write control circuit, 3
0 is a host interface, 31 is a host computer, and 32 is a timing generation circuit.

With the above configuration, when a display image is selected, the screen selection circuit 28 selects the frame buffer 22
A specific image is selected from and displayed on the display screen 25.

At this time, if it becomes necessary to change the color content of the display screen, the RAM array switching circuit 23 controls the blink RA.
Repurpose the M array for an auxiliary frame buffer and rewrite any color codes that require rewriting.

When the rewriting of the color code is completed, the readout control circuit 24 reads out the color code and switches to the display image on the display screen 25. This series of operations is performed by a clock signal from the timing generation circuit 32.

Note that the time required to change the color content of a displayed image varies depending on conditions such as the size of the image rewriting area and the specified color, but it is
280. In the case of a brain of 1,024 pixels in the vertical direction, and a capacity of 8 bits each for R (red), G (green), and B (blue), which allows natural color expression, when the specification is completed on the display screen, The display can be changed within a maximum of 200m5 (milliseconds).

〔Effect of the invention〕

As described above, according to the present invention, by slightly modifying the color display device and reusing the RAM array for blinking as an auxiliary use for the frame buffer, the image being displayed is not disturbed. , it becomes possible to rewrite the color content, which is extremely useful in practice.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the principle of the image display method of the present invention, FIG. 2 is an explanatory diagram of an embodiment of the present invention, and FIG. 3 is an explanatory diagram of a conventional method. In Figure 1, 1 is a RAM that constitutes a frame buffer for blinking.
2 is a frame buffer 7a for storing image data to be displayed on the screen of the display device; 3 is a switching circuit for converting the RAM array for blinking into an auxiliary frame buffer. Exploration invention q star rea D, 7m Fig. 1

Claims (1)

[Claims] In a display device equipped with a RAM (Random Access Memory) array (1) for blinking, the RAM array (1) for blinking is used as a frame for storing display image data.・RAM array switching circuit (3) to be used as an auxiliary function of the buffer (2)
An image display method characterized in that the RAM array switching circuit (3) switches and repurposes the blinking RAM array (1).