JP2010204441A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily visually recognize characters even when character width size is about 4 mm. <P>SOLUTION: A display device displays a character, a figure, or a symbols by alphanumeric font. In the alphanumeric font, a plurality of segments 2 indicating a single character or a single figure and segments 3, 4 indicating a symbol are arranged in the inside surrounded by the segments are arranged, and segments constituting the outer periphery of the font are arranged wholly in a trapezoidal shape in which length of an upper side is shorter than length of a lower side being in parallel with the upper side, and tilt of a left side is larger than tilt of the right side, seen from the visible direction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a display device in which a display unit is displayed in an alphanumeric font, and more particularly to a fluorescent display tube.

A fluorescent display tube, which is one of display devices, is widely used as a self-luminous display device in display units of audio, home appliances, measuring instruments, medical devices, and the like.
A cross section of the fluorescent display tube is shown in FIG. The fluorescent display tube 5 includes a cathode 13 that generates an electron beam, a phosphor layer 10 formed on the surface of a plurality of anodes 9 on the display surface of an anode substrate 11 provided on a glass substrate 6, and a phosphor layer. 10 and a plurality of grid electrodes 12 provided between the cathode 13 and an electron beam generated from the cathode 13 in a vacuum space surrounded by the glass substrate 6, the face glass 14, and the spacer glass 15. In this display device, the phosphor layer 10 on the anode substrate 11 is irradiated with light through a plurality of grid electrodes 12 to emit light to visually recognize the display body. In FIG. 6, the anode substrate 11 is formed by forming the wiring layer 7 on the glass substrate 6 and then electrically connecting the insulating layer 8 over almost the entire surface except the through hole 8a and electrically connecting the insulating layer 8 through the through hole 8a. The anode electrode 9 connected to each is formed, and the phosphor layer 10 is formed on the anode electrode 9.

Conventionally, fluorescent display tubes using an alphanumeric font as a display unit are known (Patent Document 1 and Patent Document 2).
An example of a conventional alphanumeric font is shown in FIG. 4A shows a segment arrangement example in the case of 14 segments, and FIG. 4B shows numbers and characters displayed in an alpha-numeric font according to this arrangement example.
As shown in FIG. 4 (a), the characters 0 to 9 shown in FIG. 4 (b), characters such as ORITAKE, and the like are combined with a plurality of segments 2, and the parallelogram is tilted at an angle θ ′. It is expressed by a plurality of segments surrounded by the parallelogram. Further, symbols such as a decimal point (hereinafter referred to as DP) 3 and a colon (hereinafter referred to as COL) 4 are arranged outside the parallelogram.

However, the conventional alpha-numeric font is a distance between the DP3 arranged right next to the right-end bottom 2a of the parallelogram and the COL4 arranged above the DP3, and the left-end bottom 2b of the alpha-numeric font arranged on the right. d ′ is arranged to be separated by a certain distance and has the following problems.
(1) Only DP3 or minutes to reduce the width in order to secure a space for the COL4, character width W ₂ Nearby font is compressed, it becomes poor of the font and relatively long body of.
(2) When DP3 is used, in the display of the numbers “1-89.0” in FIG. 4B, the interval between “8” and “9” and “.” And “0” Although the interval is kept constant, the interval between “9” and “.” Is hardly secured, and there is a problem that displayed characters and numbers are likely to interfere with the positions of DP3 and COL4. Originally, “.” Should have a space for one character and should be arranged at equal intervals with the preceding and following numbers. However, in the display method based on the above arrangement, the interval between the numbers becomes unbalanced and difficult to read.

As a method for improving the visibility of the display surface of the display device, an upright alphanumeric character is known as shown in FIG. 5 (for example, Patent Document 3 and Patent Document 4). 5, FIG. 5 (a) shows an example of segment arrangement in the case of 14 segments, and FIG. 5 (b) shows numbers and characters displayed in an alpha-numeric font according to this arrangement example.
Compared to the alphanumeric font shown in FIG. 4, the font shown in FIG. 5 is surrounded by an upright quadrilateral with a plurality of segments 2 to be combined. For this reason, the character width W ₂ of the alpha numeric which is the main subject of display can be maximized, and the problem of the above (1) is improved compared to the alpha numeric font shown in FIG. This problem is still not solved and the improvement in visibility is limited.

On the other hand, as the display surface of a fluorescent display tube becomes higher in definition, an alphanumeric character font having a smaller character size, for example, a character width size of about 4 mm, is required, but the visibility is improved. For this reason, the problems (1) and (2) become more serious as the font becomes smaller.
Further, in the case of a fluorescent display tube driven by dynamic driving, the grid electrode is divided into predetermined light emitting units (light emitting groups), and the anode electrode is disposed below the divided electrodes. Therefore, it is required to increase the size of the displayed characters as much as possible within the divided range to secure a light emitting area and improve visibility.

Japanese Patent Laid-Open No. 10-32171 Japanese Patent Laid-Open No. 11-31468 JP 2007-64781 A JP 2004-252267 A

  The present invention has been made to cope with such a problem, and provides a display device, particularly a fluorescent display tube, which is displayed in an alpha-numeric font that can be easily viewed even when the character width size is about 4 mm. Objective.

The display device of the present invention is a display device that displays characters, numbers, or symbols in an alpha numeric font, and the alpha numeric font includes a plurality of segments representing a single character or a single number, and an interior surrounded by the segments. A segment representing the above symbol is arranged in (1).
In addition, the alpha numeric font is characterized in that segments constituting the outer periphery of the font are arranged in a trapezoid as a whole.
The trapezoid as a whole is characterized in that the length of the upper side is shorter than the length of the lower side parallel to the upper side, and the inclination of the left side has a larger inclination angle than the inclination of the right side, as viewed from the viewing direction.
Further, the display device displayed in the alpha numeric font is a fluorescent display tube.

Since the display device of the present invention accommodates symbols such as DP and COL inside the area surrounded by the predetermined segments, the DP and COL are arranged outside the letters and numbers, as shown in FIGS. Since the character width size can be made larger than that of a conventional alphanumeric font, a bright font with excellent visibility can be obtained.
In addition, since the segments are arranged in a trapezoid as a whole, the design is widened and stable, and a perspective depth is obtained.
In addition, the design is more casual than the conventional alphabetic font shown in FIGS.
Furthermore, DP, COL, etc. can be displayed in a single space, and the distance between DP, COL and alpha numeric font can be secured more than the distance between alpha numeric fonts without DP or COL. Improvement is possible.

When applied to a fluorescent display tube, since the distance from the anode division position to the anode can be increased, it is possible to prevent the occurrence of undesirable phenomena on the display such as leakage light emission and kicking, and a high-definition display surface can be obtained. can get. Here, leakage light emission is a phenomenon in which a part of the display to be erased shines due to the influence of the applied voltage of the adjacent grid or anode, and kicking is intended to light up due to the influence of the applied voltage of the adjacent grid or anode. This is a phenomenon in which a part of the display is distorted, and is a phenomenon that occurs as a driving problem.
Further, since the wiring can be easily handled in the manufacture of the anode substrate, it can be easily manufactured.

It is a figure which shows arrangement | positioning and the display pattern of the segment which comprise an alphanumeric font. It is an enlarged view which shows arrangement | positioning of a segment. It is a figure which shows arrangement | positioning and the display pattern of the other segment which comprise an alphanumeric font. It is a figure which shows the example of the conventional alphanumeric font. It is a figure which shows the other example of the conventional alphanumeric font. It is sectional drawing which shows the structure of a fluorescent display tube.

  The display part of the fluorescent display tube has a relationship in which the electron beam emitted from the cathode is controlled by the grit electrode, and it is necessary to accommodate the light emission pattern of the anode electrode within a limited range even within the area that fits under the grit electrode. There are restrictions on the pattern arrangement of free letters and numbers. In particular, in the case of dynamic driving, the grid electrode is divided and provided for each predetermined light emitting unit (light emitting group), and an anode electrode is disposed below the divided electrode.

  On the other hand, in the alphanumeric display, DP is often used for floating-point expressions in the numerical display, and in the case of documents, the period position cannot be fixed, so it has traditionally been outside the segments that represent alphanumeric characters and numbers. Has been placed. Although DP may be substituted, COL is mainly used for time display, so its position can be fixed to some extent. Conventionally, it has been placed outside segments representing alphanumeric characters and numbers. .

For this reason, when using an alpha-numeric font on the display surface of a dynamic-drive fluorescent display tube, conventionally, a segment that displays letters and numbers of alpha-numeric font and a segment that displays DP and COL as a pair are displayed on one grid division. It was arranged.
The present invention accommodates a segment for displaying a symbol such as DP or COL in an area surrounded by a segment of a predetermined pattern, so that a pair of DP or COL is provided in one grid division of dynamic drive. Since it is not necessary to arrange the segment to be displayed, the pattern of the alphanumeric font can be maximized. Further, when DP or COL is displayed, it is displayed with a space for one character or numeral, so that the distance from the upper character / digit can be maintained. By maximizing the pattern and keeping the distance from the upper characters / digits, a fluorescent display tube with excellent visibility can be obtained. The present invention is based on such knowledge.

The alphanumeric font used in the display device of the present invention will be described with reference to FIGS. FIG. 1A shows an example of segment arrangement in the case of 14 segments, and FIG. 1B shows numbers and characters displayed in an alphanumeric font according to this arrangement example. FIG. 2 is an enlarged view showing the arrangement of the segments in FIG.
Note that the alpha-numeric font is not limited to the 14-segment display, but can include other segment displays such as a 16-segment display.

  The numerical display including the “.” Symbol of “123456678.0” and the character display including the “.” Symbol of “ONRITAKE.JP” shown in FIG. 1B are shown in FIG. Each of the plurality of segments 2 constituting the alphanumeric font 1 is combined to represent each. In addition, DP3 displayed by the “.” Symbol is also arranged in the alpha-numeric font 1 so that it is represented by the space of the alpha-numeric font 1.

As shown in FIG. 2, the alphanumeric font 1 is formed by an arrangement of 14 segments 2 that can display both letters and numbers. Here, each segment 2 is displayed as a to n. As for the arrangement of each segment 2, a trapezoid is formed by six segments a to f, and eight segments g to n forming a rice character shape are arranged in the trapezoid.
In the trapezoid formed by the six segments a to f, the length of the segment a serving as the upper side of the trapezoid is shorter than the length of the segment d serving as the lower side of the trapezoid as viewed from the direction in which the display surface of the display device is viewed. It is trapezoidal, segments e and f are linearly connected to form a slope of the left side of the trapezoid, and segments c and b are linearly connected to form a right side that is perpendicular to segment d. . A trapezoid in which the upper side and the lower side of the trapezoid are parallel and the right side intersects with the upper and lower sides at right angles and the left side is inclined is preferable. The inclination angle θ is 1 to 10 °, preferably 3 to 7 °, more preferably 5 °. Before and after.

A symbol segment group such as DP3 and COL4 is arranged in a trapezoidal region surrounded by the segments a, b, c, d, e, and f, and the alphanumeric font 1 is completed. In FIG. 2, DP3 is in the vicinity of d of the region surrounded by segments j, m, and d, the lower part of COL is in the vicinity of h of the region surrounded by segments c, m, and h, and the upper part of COL is , And provided in the vicinity of h in the region surrounded by the segments b, k, and h. By accommodating DP3 and COL4 in the trapezoidal shape, in the case of a fluorescent display tube, the entire space divided by the grid electrode can be allocated to the arrangement of segments for displaying the alpha-numeric font 1, so that the alpha-numeric font 1 The interval d can be narrowed, and the character width of the alpha-numeric font 1 can be displayed by W ₁ further expanded than W ₂ in FIG. 5 of the conventional example.

In FIGS. 1 and 2, since the character width W ₁ is increased, the lengths of the segments k, l, m, and n that form a part of the US shape can be increased, so that the segments e, f, The uniformity of the character shape of “M” characterized by l, k, b, c and “W” characterized by segments f, e, n, m, c, b is improved.
Further, the character shape of “K” or “R” has a conventional limit in the length and inclination angle of the segment m descending to the right corner, and conventionally, as shown in FIGS. 4 and 5, “K” and “R”. Although the degree of uniformity with respect to the side descending to the right corner of the character of “” is insufficient, by making this segment m as described above, the characters “K” and “R” shown in FIG. This improves the leveling of the edge descending to the right corner.

When DP3 or COL4 is displayed in the alphanumeric font 1 of the present invention, the DP3 or COL4 arranged inside the trapezoid is displayed by consuming the space of one alpha numeric font 1 alone. The interval between the alpha-numeric font 1 and the displayed DP3 or COL4 can be secured wider than the horizontal interval d between the alpha-numeric fonts 1. As a result, as shown in FIG. 1B, the visibility of the relationship between the alphanumeric font 1 and the displayed DP3 or COL4 is further improved.
In addition, the Alphanumeric font 1 has a trapezoidal lower base longer than the upper base, and the head of the hypotenuse is tilted to the right, giving the font a sense of stability and a sense of spread at the bottom. be able to.

As specific examples of the dimensions of the alphanumeric font 1 in FIG. 2, for example, the height h is 3.9 mm, the lower side length W ₁ is 2.6 mm, the angle θ is 6 °, and the distance d between the fonts 1 is 1. 0.0 mm. Further, when a plurality of columns of the alphanumeric font 1 are arranged in the vertical direction, the distance between the columns can be set to about 0.8 mm. By using the alpha-numeric font 1 in FIG. 2, even a font with a character width size of 4 mm or less can be easily visually recognized, and a fluorescent display tube excellent in visual recognition is obtained.

  Although the example shown in FIG. 2 has been described as a preferred alphanumeric font 1, the present invention has an upper side shorter than a lower side parallel to the upper side as viewed from the viewing direction, and the left side is inclined. Any segment that forms a trapezoid larger than the slope of the right side can be preferably used. By adopting a trapezoidal shape in which the slope on the left side is larger than the slope on the right side, it is possible to prevent the reverse illusion of an upright character that appears as if the displayed characters and numbers have fallen to the left.

FIG. 3 shows another embodiment of the arrangement and display pattern of segments constituting the alphanumeric font 1 used in the display device of the present invention. 3A shows an example of segment arrangement, and FIG. 1B shows numbers and characters displayed in an alphanumeric font according to this arrangement example.
FIG. 3 shows the trapezoidal alpha-numeric font 1 in FIG. 1 and FIG. 2 replaced with a rectangle. The alpha-numeric font 1 is composed of 14 segments, and six of the eight segments forming the U-shape. This is a rectangle that is surrounded by segments. Similar to FIGS. 1 and 2, segments such as DP3 and COL4 are arranged in the area surrounded by the segments.
The rectangle in FIG. 3 is a rectangle whose left and right sides are longer than the upper and lower sides. However, depending on the design of the displayed font, the left and right sides are shorter and shorter than the upper and lower sides. Can do.

As in the case of FIG. 1, DP3 and COL4 are also accommodated in the trapezoidal shape in FIG. 3, so that in the case of a fluorescent display tube, the entire alphanumeric space 1 is displayed in the space divided by the grid electrodes. Can be used for segment placement. For this reason, the interval d between the alphanumeric fonts 1 can be narrowed, and the character width of the alphanumeric font 1 can be displayed with W ₁ further expanded than W ₂ in FIG. 5 of the conventional example.

The display device of the present invention can be preferably applied to a fluorescent display tube. In the fluorescent display tube, since well without place DP3 or COL4 the grid division of the dynamic drive, it is possible to maximize the character width W ₁ of alphanumeric font. As a result, (1) the width of the segment 2 can be increased, the printability of the plurality of layers formed during the manufacture of the anode substrate is improved, and the ratio of the gaps between adjacent fonts is relatively reduced, Visibility of Alphanumeric font is improved. (2) Since the wiring space in the region surrounded by the segment 2 of the alpha-numeric font can be widened and the through hole and the carbon pad of that portion can be provided inside the character, DP3 and COL4 can be The continuity between the phosphor and the wiring can be made dimensionally easy, such as being less susceptible to the influence of the adjacent grid than in the case of being provided outside. (3) When the font width is set to the conventional width, the space occupied by DP3 and COL4 can be allocated to the grid division space, so the distance from the anode division position to the anode can be increased, and leakage This is advantageous for preventing occurrence of undesirable phenomena in display such as light emission and kicking.

  The display device of the present invention can be preferably applied to a fluorescent display tube (VFD), but can be applied to a display device having a display portion displayed in an alphanumeric font. Examples of such a display device include a liquid crystal display device (LCD), a plasma display device (PDP), a field emission display device (FED), an organic or inorganic electroluminescence display device (ELD), and a light emitting diode display device (LED). Can be mentioned.

  Since the display device of the present invention has an alpha-numeric font that can be easily visually recognized even if the character size is about 4 mm, it can be suitably used particularly for a fluorescent display tube having a small character size.

DESCRIPTION OF SYMBOLS 1 Alphanumeric font 2 Segment 3 Decimal point 4 Colon 5 Fluorescent display tube 6 Glass substrate 7 Wiring layer 8 Insulating layer 9 Anode 10 Phosphor layer 11 Anode substrate 12 Grid (electrode)
13 Cathode 14 Face glass 15 Spacer glass

Claims (4)

A display device that displays letters, numbers or symbols in an alphanumeric font,
The alpha numeric font includes a plurality of segments representing the single character or the single number, and a segment representing the symbol disposed inside the segment.   The display device according to claim 1, wherein the alphabetic font is configured such that segments constituting the outer periphery of the font are arranged in a trapezoid as a whole.   The length of the upper side is shorter than the length of the lower side parallel to the upper side, and the inclination of the left side is larger than the inclination of the right side, as viewed from the viewing direction. Display device.   4. The display device according to claim 1, wherein the display device displayed in the alphanumeric font is a fluorescent display tube.

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