DE2006983A1 - Digital alphanumeric display device - Google Patents

Description

STANDARD ELEKTRIK LORENZ AG
Stuttgart - 40
Hellmuth-Hirth-Str. 42

W. Grieb - 1

Digital alphanumeric display device

The invention relates to a digital alphanumeric display device for the characters, e.g. the ASCII code, in which the characters are selected by the selective connection of one or more Features are made visible, with the features on the sides and center lines and diagonals of a rectangle or parallelogram are arranged.

Known designs of alphanumeric display devices of the aforementioned type are usually involved to geometrical arrangements of similar, rectilinear form elements, in a plane, which by concentric t The letters E, H, I and X are superimposed.

In a known display device (glow indicator tube type B 5971 from Burroughs) thirteen form elements are used for a sufficiently clear representation of the letters A to Z and the digits 0 to 9, the upper and lower horizontal bars of the E and the vertical bar of the ¹ I. be formed by a single molded element.

In another known display device (data sheet via Electroluminescent Readout Panels from Sylvania, July 1965) are strips of electroluminescent material arranged in the manner described, with fourteen Form elements are used. ■. .

Ne / Gr '^ - ]' ■ _

Feb 16, 1970

109835/0850 "·" Ά

W. Grieb - 1

A major disadvantage of the display devices described consists in the fact that in the event of failure of individual 5-port elen »nte # lBv Error is not recognizable, i.e. another valid character arises from drawing the character set. For example can thus from the letter A an H or a P, from the number an E, a G or an S, from the number 8 an A, a 6 or become a 9. By comparing all letters and numbers there are 19 cases in which an error is not recognizable.

The disadvantage of the known display devices "I that are present in the center and / or at other intersections strong constrictions or gaps that the characters are very different in height and width, that they are not on the same baseline and that only \ just Porroelemente used, which affects the recognizability of the characters.

In another known Alfanutian display device, which also works with electroluminescence, some of the disadvantages mentioned are avoided, but a relatively large number of shaped elements, namely J55 #, is required. (J.H. Howard: Electronic Information Display Systems, Spartan Books, Wash., I965, pp. Ι9Λ-I96). This Foraeleaente are arranged in a plane according to a figure that thereby the result is that one superimposes the characters E, H and 8 concentrically, that one puts a V in front of the H, which is the left perpendicular of the H is also used, and that a T is superimposed on the same vertical. The disadvantage of this arrangement is, besides that, large expenditure of form elements and thus storage space that not all characters are displayed concentrically, this leads to different character spacing within a word. Some of the form elements have small dimensions, so that with a usable character height it can be MLt Electrolurainescent material can be run. BIe However, applicability of electroluminescent angles is due to

10983 5/0850 -A

■ 2006083

the comparatively low achievable luminance limited to special cases.

The invention is intended to avoid the disadvantages of the known arrangements and to create a display device which, with easy recognizability of all characters and little expenditure on formula elements, excludes the possibility of incorrect recognition in the event of failure of individual form elements. ■ -. - '' \ .; -: -, \ - ■; ^: '_' _: -. - ^; - / '■ "-'-'- ,. ■" ./ ■ ;' - ■ - '' - :. - ■

The invention is characterized in that the form elements on the diagonals are parts of parabolas of the third degree, the turning points of which lie in the center of the rectangle or parallelogram, that in this center a round Foreeleaent is inserted that on each of the long sides four formulas the short sides two form elements each, noble the one form element consists of two parts, between which the other form element lies, on the long center line a form element that consists of two parts, and on the short center line two formulas are arranged. . ' - ■ ".. '-. ■' ... ^-.::

The arrangement follows from the concentric superposition of the letters E, H and I, as well as two parabolic arcs, the are symmetrical to one another with the horizontal bar of the H as a common tangent, with the point of intersection of H and I as a common vertex or inflection point, and where the parabolic arcs intersect the corners of the quadrangle, obtained by superimposing E and H.

A significant improvement in the recognizability of the characters is achieved through the fact that the common Intersection of H, I and the two parabolic arcs Foraelement is introduced, which has the shape of a circular disk owns. Through the application of the parabolic arches in connection

10983570850

W. Grieb - 1 U

with the central, disc-shaped element, it is possible to e.g. the characters S, 2, 5 and 8 without disturbing interruption clearly and immediately recognizable in the middle and without excessive stylization. By the use of different form elements, it is possible to use the characters contained in the ISO 7-bit code or ASCII code, i.e. all letters, numbers and special characters are clear, legible without any compulsory learning and without disruptive interruptions in the To represent typeface as well as concentric. So there are no different ones in the word context Spaces between letters. All letters and numbers are basically the same height and almost the same wide, resulting in a uniform typeface. By inclining the vertical lines to the right, e.g. by 10 °, the typeface is further improved.

The invention will now be explained in more detail with reference to the figures, for example.

Show it:

1 shows the display device;
2 shows the individual form elements;

5 shows a section through the chambers of the shaped elements 5 * 10 and 15;

4 shows the control of the display device.

Fig. 1 shows the arrangement of form elements on the sides, center lines and diagonals of a parallelogram with a Inclination of the vertical by 10 ° clockwise. The individual shaped elements are denoted by the reference numerals 1 to 20 designated. By connecting one or more form elements, all characters of the ASCII code can be displayed.

109835 / ORBO ''''

OWQINAL INSPECTED

"■." ⁵ " ■ - ' 2008983

W. Grleb - 1 '

The individual form elements are in Pig. 2 shown again. The shaped elements 2 and 18 and the shaped element 6 each consist of two parts that are connected to one another. The shaped elements 1, 4, 17, 20 are kidney-shapedj the shaped elements 3,19 are parallelogramsj the shaped elements 2,18 are double parallelogramsj the shaped elements 5, 7, 15, 16 are parabolic arcsj the shaped element 6 is a double beam; the shaped element 11 is a circular disk ; the shaped elements 8, 9, 13, 14 are wedges and the shaped elements 10, 12 are hexagons.

In the example of Fig. 1, the ratio of character height is to character width 10: 7 and the ratio of character height to strip width 10; 1. The ratio of both the diameter the circular disk 11 arranged in the middle and the base line length of the form elements 3 and 19 for Stripe width is 7: 5 · If the parallelogram were a Rectangle, then the arrangement of the form elements would be both axially symmetrical to the center lines as well as rotationally symmetrical with respect to the center point of the molding element 11, with the restriction that the intersection line between the shaped elements 9 and 14 on the one hand and 8 and 13 on the other hand runs differently in characteristic catfish, than would be expected according to the symmetry requirement. These two cuts are placed in such a way that the typeface of the characters G, 3 # 4, 5, 6 is particularly cheap. As already indicated, the form element 2 by the form element 3 and the Form element 18 through the form element 19 in two three dimensions cut separate parts. In a corresponding manner the formula element 6 divided into two by the form element 11. the outer rounding of the form elements 1, 4, 17 and 20 improves the legibility of the characters B, C, G> J, 0, P, $, R, S, U, 0, 2, 3, 5 * 6, 8 and 9, essential.

1098 357 0850

W. Grieb - 1

The table below shows all characters of the ASCII code with their corresponding place in the ASCII code table and the form elements necessary to represent the Sohrift characters clearly summarized.

Tabel

ASCII table font column / line character 12 3

4 · / * / * / * / * / * / ^ / * / ^ / * / * / 4> f 1 '2 '3 ^ 4 '6 '7 f 8 ^ 9 '10 ( n '12 '13

15th

B C D £ F G H I J K L N K 0

XXXX XXXX XXX

XXX XXX XXX XXX X X

X X

X X

X X

XXXX

6th

X X

XX M

X X

Toraeleaente 10 11 12 13 14 15 16

XXXXX

XXX

XXXX

XXXX

X X

XXXXX

XXX

X X

X X

X X

X X

17 18 19 20

X X

XXXX XXX

XXX XX X X

XXXX X X

XXXX X X

XXX

XXXX

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ν ;. Greaves -

ASCII-T from the first letter column / line characters .12

5 / O 5/1 5/2 5/3 5/4 5/5 5/6 5/7 5/8

5/10 3 / O 3/1 3/2 3/3 3/4 3/5 3/6 3/7 3/8 3/9 3 ■■ /

3/3/12

3/13

QRST Ü V WX

X X XX

X XX X

X X XX XXX X

X X X X

X X

X X

X X

5 67 8

Formula era duck
10 11 12 13.

15 16

X X X

XX XX

χ χ χ χ χχχ χ

X XX XXX

XXX XX X X XXXX

X X X X X

X X X X X

X X X X X

X X X

XXX

X X

. X

X X X XX XX X XX -

X X XXX

3C

X X X

X XK

XX

X X X

■ χ χ

X X

18 19 20

X X XX

X X

X XX X

XXX X X

X X

X X

XX X XX X X X XX X

XX X

X XX XX X X X

X X

X X XX XX X X

X X

3.Κ / η «50

W. Grieb -

ASCII table font-column β / line characters

3/14 5/15 2/0 2/1 2/2 2/5 2/4

■ 2/5 2/6 2/7 2 / θ 2/9 2/10 2/11 2/12 2 / 2/14 2/15

12 3

? XXXX

(Space)

! χ

"xx Jt

$ XXXX

XXX

5 6 7

X X

X XXX form elements 10 11 12

χ χ X X

XXX X

X XXX

X X X X X

XXX XXX

14 15

X X X X

17 18 19

XXX

XXXX

xxxx

./■

10983R / 0850

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W. Grieb - 1

A preferred embodiment is shown in Fig. 3; this shows a section through the shaped elements 5, 10 and 15 along the line AA (Fig. 1). The cut shows that the display device consists essentially of a transparent pane 22 which is coated on one side with a matt layer 2j5 is provided, from a tightly adjoining the matted side chamber system 21, the chambers for Matt layer in the form of the form elements of the characters are open, finally from a printed circuit board 25, each chamber equipped with an incandescent lamp 24 small dimension that connects to the chamber system 21 so that the light bulbs through corresponding openings in the Reflector-like chambers protrude. Their surfaces are roughened to increase light scattering. Two-part form elements have two separate chambers.

The arrangement enables parallax-free reading of the characters with a high brightness contrast, which is retained even with the large viewing angle of over 150 ° that can be achieved. For example, the chamber system for the sake of a more favorable heat dissipation <cast metal, possibly with side-cast cooling fins made. The arrangement is characterized by a low installation depth, since there are no lenses or the like.

The incandescent lamps with a very long service life can with Amplifiers controlled in their brightness or directly with integrated semiconductor circuits with low voltage (e.g. 5 V).

According to FIG. 4, the incandescent lamps 28 can be driven via driver stages 27 be connected to the parallel outputs of a flip-flop shift register 26 with serial input, in which the to be displayed Character bit for bit, i.e. feature by feature, is saved for the duration of the display.

ORlQlNALfNSPECTED

^{"10" 2ÜÜ6:;} 33

W. Grieb - 1

In the case of the display device described, if a form element fails, the error can be recognized in any case and in most cases also correctable. If you compare two characters of each of the 36 letters and digits, i.e. at 650 comparisons, there are only 6 cases in which the Failure of two specific form elements from one character results in another valid character. These cases where an error cannot be identified, but are highly unlikely. There are also four cases where errors are recognizable without being correctablej these are failures of certain form elements in the Characters M, N, and W. These cases are also highly unlikely.

It is particularly pointed out that in the new display device no number can change into another number due to the failure of a form element, but rather are not only recognizable errors in the representation of digits even with any two simultaneous failures, but also correctable. This significantly increases the mean operating time (MTBF).

If the two parts of the two-part form elements (2, 6, 18) are switched separately, further special characters, for example [, J unä (cu , and all Russian letters) can be displayed. The number of form elements is then the same as the number of light bulbs twentythree.

3 sheets. Drawings, 4 fig.
6 claims

10 9835/0850 / *

OFHGHNAt INSPECTED

Claims (5)

W. Grieb - 1 Claims Digital alfanumeric display device for the characters, for example the ASCII code, in which the characters are made visible by selective connection of one or more form elements, the form elements being arranged on the sides and center lines and diagonals of a rectangle or parallelogram, characterized in that the Form elements on the diagonals (5, 16; 7 * 15) are parts of parabolas of the third degree, the turning points of which are in the center of the rectangle or parallelogram, that in this center a round form element (11) is used that on the long sides each four shaped elements (1, 9, 14, 17; 4, 8, 13, 20) on the short sides two shaped elements (2, 3 J 18, 19) * where one shaped element (2; 18) consists of two parts, between which the other shaped element (3j 19) lies, a shaped element (6) consisting of two parts is arranged on the long center line, and two shaped elements (10, 12) are arranged on the short center line. 2. Display device according to claim 1, characterized in that the shaped elements have the shape shown in Figures 1 and 2 when arranged in a parallelogram. 3. Display device according to claim 1 or 2, characterized in that the two parts of the two-part shaped elements (2, 6, 18) can each be switched on separately, whereby the number of shaped elements increases from 20 to 23. Ne / Or Feb 16, 1970 109835 A0850 / ♦ W. Grieb - 1 4. Display device according to claim 1 or 2, characterized in that the width of the shaped elements is chosen so that character height to character width to width of the shaped elements such as 10: 7 ί 1 behaves. 5. Display device according to one of claims 1 to 3, characterized in that the angle of inclination of the parallelogram is 10 ° clockwise. Display device according to one of the preceding claims, characterized in that each shaped element or a part of the shaped element is accommodated in a metallic chamber shaped accordingly to the shaped element with light-diffusing inner surfaces, in which there are incandescent lamps, and that all chambers are immediately behind a transparent one on the chamber side frosted disc are arranged. 10983 s / naso