JPH0118454B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention provides a method for displaying data using a raster scan method using a display device in which the brightness of pixels is fixed. , relates to a pseudo half-brightness display method for a display device for displaying images as if they were displayed at half-brightness.

[Background of the invention]

To display data with emphasis when displaying data using a raster scan method and using a display device with fixed pixel brightness,
Due to the limitation that pixel brightness is constant, half-brightness display is not possible, so there is inverted display where the display color of the data you want to emphasize and the background color are inverted, and backblink which alternates between normal display and the above-mentioned inverted display. Highlighting methods such as display and blinking of data patterns are adopted.

The above-mentioned highlighting method is suitable for calling the attention of the operator of the display device, but it requires the operator's constant attention, such as a display to distinguish newly input data from existing data. When used to display certain data, the brightness changes on the display device are large, causing eye fatigue to the operator, and is undesirable in terms of man-machine interface.

In addition, in a display device whose brightness is variable, for example, as shown in FIG. By setting it to (b), two types of brightness can be obtained on the CRT. However, with this method, when the brightness of the display device is changed depending on the surrounding brightness, the relationship between the cathode potential of the CRT and the brightness has a dead zone and a saturated region as shown in Figure 1. The brightness of B is not always half of the brightness of A, and when the brightness is lowered as shown in Figure 1 B, the brightness due to the half-brightness cathode potential value B is 0.
This has the disadvantage that half-bright pixels may not be displayed on the CRT.

[Purpose of the invention]

The present invention has been made in consideration of the above points, and when displaying data using a raster scan method and a display device in which the brightness of pixels is fixed, an operator can select data to be displayed with emphasis. Instead of displaying using the highlighted display method, which causes fatigue, it is possible to display the image as if it were displayed using half-brightness display, which is less tiring and can only be performed on a display device capable of displaying multiple gradations. Another object of the present invention is to provide a pseudo half-brightness display method that can display data at half-brightness as long as the normal display is displayed.

[Summary of the invention]

The present invention is characterized in that a part of display data is displayed distinguishably from other normal display data using a pseudo half-brightness display pattern obtained by ANDing a pattern used for normal display and a hatching pattern. .

[Embodiments of the invention]

Next, one embodiment of the present invention will be described with reference to the respective figures.

Here, FIG. 2 is an external perspective view of a document editing device using a display device according to an embodiment of the present invention, FIG. 3 is a block diagram of a control circuit in the same document editing device, and FIG. FIG. 5 is a flowchart showing the input processing in FIG. 4 in more detail. FIG. 6 is a flowchart showing the operation of the editing device in more detail. FIG. 7 is a schematic flowchart of the operation program of the display device, FIG. 8 is a flowchart showing details of the pseudo half-brightness display processing device, and FIG. 9 is a flowchart showing the operation program of the display device during normal display. FIG. 10 is a pattern diagram showing the data to be displayed. FIG. 10 is a pattern diagram for creating a pseudo half-brightness display pattern used in this embodiment. FIG. 11 is a diagram of a pseudo half-brightness display pattern created in this embodiment.

That is, a document editing device using a display device according to an embodiment of the present invention, as shown in FIG.
03, it is composed of a printer 202 which is a printing section, and a display device 204 which is a display section, and these main body 200, printer 202, keyboard 203 and display device 204 are
As shown in FIG. 3, control signals or information signals are exchanged through cables 210 to 220 or signal line 15, respectively.

In FIG. 2, 201 is a flexible disk device (hereinafter referred to as FDD).

In the main body 200, a control section 120, which is shown in the dashed line in the control circuit shown in the block diagram of FIG. 3, is installed.

Namely, a program storage type computer unit (hereinafter referred to as host CPU) 101, a boot ROM 102 made of non-volatile memory and having a program to be executed when the power is turned on, and an optional memory for storing programs and information for executing functions as a document editing device. , a readable and writable program memory 103, a display interface 104 that sends commands and data to the display device 204 according to instructions from the host CPU 101, and a flexible disk control circuit (FDC) that controls the FDD 201 according to instructions from the host CPU 101.
105, the host CPU sends signals to control the printer 202 and print signals to the printer 202 according to instructions from the host CPU 101, and receives signals indicating the status of the printer 202 from the printer 202;
a printer controller 106 that sends data to 101;
Keyboard 2 according to instructions from host CPU 101
03 and sends an input signal from the keyboard 203 to the host CPU 101, and the host CPU 101,
Boot ROM 102, program memory 103,
Display Interflow Ace 104, FDC
105, FDD201, printer controller 1
06, and an internal wiring path 110 connecting the key input controller 107.
is installed.

Here, the FDD 201 drives a flexible disk, which is a magnetic storage medium, and records information on the flexible disk and reads information from the flexible disk. An FDD 201 relating to a temporary storage section is installed substantially at the front of the main body 200.

Next, the overall operation of the document editing device will be explained.

That is, when the power is turned on in the configuration described above, this device executes the document editing device having the flow shown in FIG. 4, which is stored in the flexible disk in the FDD 201, according to the program in the boot ROM 102. A program to be operated as a document editing apparatus is transferred to the program memory 103, and then the document editing apparatus starts operating according to the program having the flow shown in FIG. Here, the auxiliary function is a general term for a function that aggregates functions such as copying a document on a flexible disk to another flexible disk.

When input processing is selected by the work selection input, an input processing program having a flow as shown in FIG. 5 is executed. The document being inputted is transferred between the display interface 104 and the signal line 15 according to the input processing program in the program memory 103, which has the flow shown in FIG.
By sending commands and data to the display device 204 via the
04. Processing instructions associated with inputting data to the document are input from the keyboard 203 and detected by the host CPU 101 via the keyboard controller 107. Host CPU10
1 displays the pattern code of the input data, undefined commands, etc. according to the input, and displays it on the display device 2.
Send to 04. As a result, data input from the keyboard 203 is displayed at half brightness on the display device as undefined data.

Thereafter, when a data confirmation command is input from the keyboard 203, the host CPU 101 detects this and sends the data pattern code, confirmation command, etc. to the display device 204. As a result, the data that was displayed at half brightness as unconfirmed data on the display device 204 is normally displayed as confirmed data on the display device.

Thereafter, by repeating this operation until the data input is completed, the input data is displayed on the display device 204.

When a command to end data input is input from the keyboard 203, the host CPU 101 detects this, executes end processing, ends the input processing as shown in the flowchart of FIG.
This is to prepare for the next process.

The termination process in FIG. 5 is a process in which input data is written to a flexible disk and temporarily stored.

Next, a display device according to an embodiment of the present invention will be described.

That is, the display device used in one embodiment of the present invention has a program storage type computer unit (hereinafter referred to as CPU) 1, as shown in FIG.
A character generator 2 stores patterns representing characters, symbols, etc. in a dot matrix and shading patterns using character and symbol codes as indexes, and a character generator 2 stores patterns representing characters, symbols, etc. in a dot matrix, and character and symbol codes as indexes. reads out the dot data from the video memory 8, converts it into a video signal, and sends it along with a synchronization signal to the ORT 9, which displays the data, through signal lines 13 and 14.
A program consisting of a CRT controller (CRTC) 3, a host interface 4 that communicates with an external device through a signal line 15 according to instructions from the CPU 1, and a non-volatile memory, which stores programs to be executed in order for this display device to operate.
ROM5, RAM which is a memory that can be read and written at any time to store information when this display device operates and information about data to be displayed.
6. Bus controller 7 that adjusts access from CPU 1 and CRTC 3 to video memory 8;
Video memory 8 for storing data patterns to be displayed on CRT 9, CRT for displaying data
9, CPU 1, character generator 2,
CRTC 3, host interface 4, program ROM 5, RAM 7, CPU bus 10 connecting bus controller 7, and signal lines 11, 12, 1
3, 14, and 15.

The overall operation of the display device configured as described above, including the pseudo half-brightness display method according to an embodiment of the present invention, will be described next.

That is, when the power is turned on in the above configuration, it starts operating as a display device according to the program in the program ROM 5 having a flow as shown in FIG.

It waits until a command is input from an external device, and when a command is input, it interprets the command and performs each process. If the command is a pseudo-half-brightness display command, pseudo-half-brightness display processing having the flow shown in FIG. 8 is executed.

First, the pattern of displayed character data as shown in Figure 9 (here, the pixels in the shaded area become bright spots on the CRT,
It is considered as logic "1". ) and a shading pattern for creating a pseudo half-brightness display pattern as shown in FIG. 10 are read from the character generator 2. next,
The character data pattern and the shading pattern are ANDed to create a pseudo half-brightness display data pattern as shown in FIG. When this process is finished,
The address in the video memory 8 where the pseudo half-brightness display pattern should be written is calculated, and the pattern is written into the video memory 8. As a result, a pseudo half-brightness display pattern as shown in FIG. 12 is displayed on the CRT 9.

Note that the normal display process in FIG. 7 is a process in which the data pattern shown in FIG. 9 is written into the video memory 8 as is, and the inverted display process is a process in which the data pattern shown in FIG. 9 is inverted and then written. It is processing. Other processing includes, for example, processing such as vertical scrolling and data deletion.

The pseudo half-brightness display pattern as shown in Fig. 11 is
Compared to the normal display pattern shown in Fig. 9, the pattern shape is well preserved, but the number of constituent pixels of the pattern is reduced to about half.
When displayed on the CRT 9, the display looks as if a pattern with the brightness of the pattern halved.

As detailed above, in the past, display data could only be highlighted using highlighting methods such as reverse display or backblink display. However, by using this pseudo-half-brightness display method, it is possible to display data as if it were displayed at half-brightness, thereby realizing diversification of data display, and a display method that can reduce operator fatigue. is possible.

Furthermore, the half-brightness data according to the present pseudo-half-brightness display method is displayed at approximately half the brightness of the normal display data as long as the normal display data is displayed.

〔Effect of the invention〕

According to the present invention, a single-luminance display employs a raster scan method, in which the luminance of pixels is fixed, and display data can only be highlighted by a highlighting method such as reverse display or back-blink display. Reduce operator fatigue by providing a pseudo half-brightness display method that can display data as if it were displayed in half-brightness mode, which can only be done with display devices capable of multi-gradation display. This invention can be said to have excellent practical effects.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the relationship between the cathode potential and brightness of a CRT, and FIG. 2 is an external perspective view of a document editing device using a display device according to an embodiment of the present invention.
FIG. 3 is a block diagram of the control circuit in the document editing device, FIG. 4 is a schematic flowchart of the operation of the document editing device, and FIG.
6 is a block diagram of a control circuit of a display device used in an embodiment of the present invention, and FIG. 7 is a schematic diagram of an operating program for the display device. FIG. 8 is a flowchart showing details of the pseudo half-brightness display process, FIG. 9 is a pattern diagram showing data displayed on the display device during normal display, and FIG. FIG. 11 is a diagram of the half-brightness display pattern used to create the pseudo-half-brightness display pattern. 1...CPU, 2...Character generator,
3...CRTC, 8...Video memory, 9...CRT,
101...Host CPU, 102...Boot
ROM, 103...Program memory, 104...
... Display interface, 107 ... Key input controller, 110 ... Internal wiring path, 1
20...control unit, 203...keyboard, 204
...Display device.

Claims (1)

[Claims] 1. In a display device in which a pattern representing data, etc. displayed on the display device is formed by a set of pixels with fixed brightness, when displaying some data, etc. to distinguish it from other data, A pseudo-half-brightness display method for a display device, characterized in that a pseudo-half-brightness display pattern obtained by ANDing a pattern used when normally displaying the data and a hatching pattern is used as a pattern representing data.