JPH0571095B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for displaying display elements such as characters, figures, symbols, etc. on the screen of a white phosphor CRT.

(Prior Art) Some CRTs (cathode ray tubes) for displaying the output of computers and word processors are equipped with a white phosphor display screen (hereinafter referred to as white phosphor CRT).

FIG. 3 shows the display brightness of each display element on the screen of a white phosphor CRT and the background of the display element in the normal display mode. In Figure 3, 1
indicates a black level, 2 indicates a normal luminance level, and 3 indicates a high luminance level. In the normal display mode, black level 1 is the background BG, and among the characters that are each display element, characters that do not need to emphasize the display state (hereinafter referred to as
These are called non-emphasized characters NSC. ) has a normal brightness level of 2, and a character whose display state is to be emphasized (hereinafter referred to as emphasized character SC) has a high brightness level of 3.

FIG. 4 is a diagram showing the display state on the CRT screen 4 in the normal display mode. In FIG. 4, the non-emphasized characters NSC are shown as "NORMAL", and the emphasized characters SC are shown as "HIGH", as an example. In this case, the background BG is black,
NORMAL non-emphasized character NSC with normal brightness (gray)
Then, highlight the HIGH characters SC with high brightness (white),
Each is displayed in three stages.

(Problems to be Solved by the Invention) By the way, in a word processor, while looking at the characters written in a manuscript, the user operates the input keyboard to display the characters on the CRT screen. In this case, the printed matter such as the manuscript must have a background.
The color of the paper used as BG is white, and it is normal for this paper to have black letters written on it. On the other hand, on the white phosphor CRT screen 4 as shown in Figure 4, the background BG is black and the display elements, such as characters NSC and SC, are gray (normal brightness) or white (high brightness), contrary to the original. ) is displayed. Therefore, a word processor operator should read a document whose background BG and the display state of characters, etc. are completely opposite.
Since the operator must alternately compare the images with the CRT screen 4 during operation, there is a problem in that the eyes become extremely fatigued.

In order to solve this problem, conventionally, as shown in Figure 5, the normal brightness level is set to 2 for non-emphasized characters NSC, and the black level is set to 1 for emphasized characters SC.
Additionally, the background BG was displayed in reverse at high brightness level 3. In such a conventional method, the background BG is high brightness on the white side, as shown in Figure 6, and the characters are either non-emphasized or emphasized.
Since the NSC and SC also have a black level of 1, the state of the CRT screen 4 becomes closer to that of the original, and the above-mentioned problem is solved. However, on the other hand, there is another problem in that the high-luminance background BG makes it difficult to see the normal-luminance non-emphasized characters NSC, which make up the majority of the characters.

In another conventional method to solve this problem, as shown in Figure 7, the background BG is displayed at a high brightness level of 3, and the characters, etc. are displayed at a black level of 1, regardless of whether they are emphasized or not. There is a way to do it. However, with this display method, as shown in Fig. 8, the background BG and the characters, etc., NSC and SC are clearly distinguished from each other, but the distinction between non-emphasis and emphasis, which is made clear in the manuscript, is not shown on the CRT screen 4. There is yet another problem in that it does not stick at all.

The present invention aims to solve each of these problems.

(Means for solving the problems) In order to achieve such an object, the present invention has the following features:
On a white phosphor CRT screen, the background is displayed in black in normal display mode, while non-highlighted display elements such as characters, figures, symbols, etc. are displayed at normal brightness, and highlighted display elements are displayed at high brightness. In the reverse display mode, the background is displayed at normal brightness, non-highlighted elements are displayed in black, and highlighted elements are displayed at high brightness.

(Function) In this display method, the background on the CRT screen is displayed at normal brightness in reverse display mode,
Non-highlighted display elements are displayed in black, and highlighted display elements are displayed in high brightness similar to the normal display mode, so the background and each display element are displayed on the CRT screen in almost the same manner as printed materials such as manuscripts. will be displayed.

(Example) Hereinafter, one example of the present invention will be described in detail. FIG. 1 is a diagram for explaining the display method according to the embodiment of the present invention, and FIG. 2 is a diagram according to the method of the present invention.
4 is a diagram showing a display state on a CRT screen 4. FIG. 1st
In the figure and FIG. 2, parts corresponding to those in FIGS. 3 to 8 are given the same reference numerals. The normal display mode in the method of the present invention is the same as the conventional display mode explained with reference to FIG. 3, so a description of this normal display mode will be omitted.

In FIG. 1, 1 indicates black, 2 indicates normal brightness, and 3 indicates high brightness. As shown in FIG. 1, in the method of the present invention, in the reverse display mode, the background BG is displayed at the normal brightness level 2, the non-emphasized characters NSC, which make up the majority of the characters, are displayed at the black level 1, and the highlighted characters SC are displayed at the black level 1. Each is displayed at high brightness level 3.

Therefore, as shown in Figure 2, the non-emphasized characters
NORMAL, which is NSC, is displayed in black, HIGH, which is emphasized character SC, is displayed in white, and background BG is displayed in gray, which is the normal brightness.
The display state on the CRT screen 4 is almost similar to that of a printed matter such as a manuscript, and for example, an operator operating a word processor has to look at the screen 4 and the manuscript alternately and use his/her eyes while operating the machine. Fatigue level is significantly reduced.

(Effects) As described above, according to the present invention, in the reverse display mode, the background is displayed at normal brightness, non-highlighted elements are displayed in black, and highlighted elements are displayed at high brightness. Because of this, the background and each display element can be displayed on the CRT screen in almost the same manner as a printed matter such as a manuscript, and an operator such as a word processor can easily read the characters written on the manuscript etc. Eye fatigue during input operations is significantly reduced.

[Brief explanation of the drawing]

Figures 1 and 2 relate to the method of the present invention;
The figure is a diagram for explaining the reverse display mode in the embodiment method of the present invention, and Figure 2 is a diagram according to the method.
FIG. 3 is a diagram showing a display state on a CRT screen. Third
This figure corresponds to FIG. 1 in the normal display mode, and FIG. 4 is a diagram showing the display state on the CRT screen according to FIG. 3. Figures 5 to 8 relate to the conventional method, Figures 5 and 7 correspond to Figure 1 according to each conventional method, and Figures 6 and 8 correspond to Figures 5 and 7, respectively. FIG. 3 is a diagram showing a display state on a CRT screen in reverse display mode. In the figure, 1 is the black level, 2 is the normal brightness level, 3 is the high brightness level, 4 is the CRT screen, NSC is the non-emphasized text, SC is the highlighted text, and BG is the background.

Claims (1)

[Claims] 1. On the screen of a white phosphor CRT, the background is displayed in black in normal display mode, while non-highlighted display elements among display elements such as characters, figures, symbols, etc. are displayed at normal brightness. Furthermore, the highlighted elements are displayed with high brightness, the background is displayed with normal brightness in reverse display mode, the non-highlighted elements are displayed with black, and the highlighted elements are displayed with high brightness. A display method on a white phosphor CRT screen characterized by: