DE2350760A1 - ALPHANUMERIC DISPLAY DEVICE - Google Patents

Description

PATENT ANWAiT 50ZB RODENKIRCHEN (βζ.

c.NG. FRlEDRICIi B. FfSGHER

FAIRCHIIB CAMERA AND INSIKUKBH! E F 7372

CORPORATIOK DrvF / WI 464 Ullis Stree *

Mountain View * California 94G4Q, USA 2350760

Alphanumeric display device

The invention relates to solid-state display devices, and it relates particularly to packaging for facilities of this type · They can be constructed as hybrid circuits be where multiple light emitting diodes are on a base, with a special packing system being present to keep the emitted light in the mold an alphanumeric character.

Facilities for displaying alphanumeric characters. several light-emitting diodes, soft on a pad are attached, are known »They are like a pack formed and generally contain several translucent or translucent plastic parts, which are in the shape of each segment of an alphanumeric character are adapted. The one emitted by an activated diode Light is directed through the plastic segment, it brings the translucent plastic material to light up and thereby generates the indicator light; of the character segment in question Because of the translucent properties of the plastic material, no lens system is required

Combination of all illuminated segments forms the character to be displayed. With devices of this type, difficulties arise mainly because the transmission of the small amounts of light from the individual light-emitting diodes through the translucent plastic material takes place with low efficiency. It is therefore desirable that more powerful systems be created will.

The invention relates to a pack for the selective display of one of several alphanumeric characters, which has several separate, light-emitting diodes which, when electrically activated, each form a point light source for a segment of a character to be displayed Arranged form of required segments of all alphanumeric characters to be displayed; on the base, a unitary, designed as a material block attachment piece with two opposite parallel surfaces is arranged so that a first surface is adjacent to the base; several light tubes in the shape of the character segments extend through the top piece from the first side to the opposite side, and one of the light tubes is arranged in line with a corresponding diode; the walls of each light tube are reflective so that the light emitted by each electrically activated diode is passed through its associated light tube; The other, opposite side of the top section is covered by a composite lens which, like a fly's eye, has several individual lenses arranged closely together and at least covers the ends of all light tubes on the second side of the top section, so that the light from each electrically activated one is filled the diode through the light ear assigned to it and daiSn ät

409623/0705

the compound lens arrives} on these catfish become upon the lens visually represents all segments of the alphanumeric character, according to the electrical activation one or more of the light emitting diodes.

Light tubes have previously been used in certain cases to transmit the light from bright incandescent lamps, but it is not known to use light tubes with a useful efficiency of the light transmission the small amount of one pass light emitting diode generated light. The basic idea of the invention is based on the unexpected finding that the combined use of a light tube with reflective walls and a fly-eye type built-up lens to cover the display end of the light tube a very substantial improvement and increase in efficiency the light display made of small light emitting diodes. The invention therefore offers a significant improvement, compared to the previously known light-emitting diode packages with translucent plastic material. Another The advantage is the possibility of inexpensive production and simple adaptation to large-scale production.

The invention is illustrated below with reference to one in the drawing illustrated embodiment described in more detail.

FIG. 1 is a plan view of one designed according to the invention Document.

FIG. 2 is a plan view of an attachment piece designed according to the invention: with light tubes.

409823/0705

FIG. 3 is a side view of the interior of an overall package formed in accordance with the invention, with the end the package is removed.

FIG. 4 is a sectional view along the line 4-4 of FIG Figure 2.

As Figure 1 shows, light emitting diodes 11, 12, 13 »14, 15, 16 and 17 are on a conductive metal plate 18 (Figure 3) attached so that its light emitting side is facing up. These diodes lie next to each other on their base, and the general arrangement corresponds to the segments required to represent all alphanumeric characters. In which presently selected embodiment of the invention, the diodes 11, 12, 13, 14, 15 »16 and 17 are arranged so that they Segments correspond to a number 8 (shown in Figure 2). It is known that a digit consisting of seven segments 8 can represent all digits from 0 - 9 by selectively activating two or more diodes. Diode 13 is used for illustration of the decimal point used · This segment arrangement is common in technology and therefore does not need to be explained in more detail.

The first electrical connection for each diode is common because each diode is on the metal plate 18 on the pad 10 1 soldered on according to the illustration in FIG. The other electrical connection is separate and enabled for each diode therefore a selective electrical activation} these connections are designed as a wire connection 19, which of the top surface of each diode leads to a conductive peg 20. The pegs 20 are, as shown in Figure 3, from the lower part of the pack facing outwards for a plug-in

9823/0705

land electrical connection to a trained in the usual way printed circuit board · Preferably, the surface of the metal plate 18 around the diodes is covered with a opaque insulating layer, e.g. black paper, covered, in order to prevent the wires 19 from shorting against the metal. The. Prevents light impermeability of the material unwanted light reflectioneia »

This as a unitary block of material formed © top section containing the inventively provided Lichtrohr® is, consists in Figures 2 and 4 shown DE® Autßtss @ Tück 21 preferably from Kunstetoff ₀ in <ä © e has © only © in © unter® surface 22 , which is opposite the ³ © feezes FMöIiq cte document «10 about the light-emitting !! Bloürnm © Btspre © fe @ M ä @ i? Bss »st © l ·» lung in Figure 3 is »Like Figures. 2 umd 4 g © igea _s ßiat attachment piece 21 ®fee zueit © parallel fli © Ji, © 2 ^ ₀ auf fäes> Lieht, welefoes d.ur © h dl © L ± © äta? © las »o 24 g © lsagtg sias ^ Ma © Ig © gs tor Acht will »Das Aofsatsstuek 21 © gitMlt ^ © Με ³ © ^ © Lielats ³ © !!! ⁵ © 24 _v welehe di © F © r®
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used attachment piece 21, the light emitted by each electrically activated diode with high efficiency through the their assigned light tube 24 and shown as a light segment on the surface 23 of the top section 21 · To a To obtain the highest possible degree of efficiency, it is advantageous to to coat the surface 23 with a non-reflective material which surrounds the exposed segments 24.

Without the lens cover 25 shown in FIG. 3, however, the amount of light arriving at the surface 23 of the attachment piece 21 will not appear in the form of individual segments, "but it would only appear as a light spot (hot spot) in the cement of each of the delivery tubes a composite lens cover 25 is provided which covers the second surface 23 of the attachment piece 21. This lens cover contains n & any kind of a® fly's eye several lenses 26, which are close together »One such lens cover brings about an advantageous ©? ¥ @ is © Eis® dispersion d © s j to display entering light, so that they are completely illuminated segment "The zusaBmengesetste lens 25 Isadeokt at least the ends of the light pipes 24 in the second surface 23 of the cover piece 21 (Figure 2) ^·; The Lins @ naM®cki22ig 25 so Rass a sufficiently large range of Fli®geaaugen-Lins @ a 26 to contain at least the entire wcid 3 shows the Besiaalpmjkt cover shown in Figure 2 corresponding to 27 "B © i the illustrated and described Fiüsrungsbelspiel der Erfisidting are the fly-eye lines 26 uaaitteltoar in di © ä.Msekssg-25 melted-,: 'wal © la @ made of lisfetdttrshllsslgsa plastic b «stöh.t · The plastic can be wai-S oösr red colored saiEg © 2 kasa clear ■ αά. & τ matted ssia ed®r ssastige F®rfcaa © qop BigGii for d @ a-Zw @ © k of the Mosiga "g © e

is close to the rare of the base 10, so that, as shown in Figure 3, a complete encapsulation formed 1st.

With appropriate electrical activation, the light comes from each of the light-emitting diodes shown in FIG 11-17 through the corresponding light tube 24 (Figures 2 and 4) and then through the compound lens 25 (Figure 3)> so that one receives on the lens cover 25 a visual display of all those segments of the alphanumeric character which was chosen by the electrical activation of one or more light emitting diodes. If, for example, all light-emitting diodes 11-17 are electrically activated, then correspond! the illustration according to FIG. 2 all segments 24 and the decimal point 27 is illuminated so that the digit "eight" is displayed with the decimal point. If, however, all diodes except for diodes 11 and 12 corresponding to the two segments 24 arranged at the bottom left in FIG. 2 (one vertical and one horizontal) are illuminated, the symbol displayed is a "nine" with a decimal point · If diode 13 (Figure 1) is not activated, the decimal point 27 (Figure 2) is not displayed.

The invention is not only applicable to the character combination described, but it can also be used for all letters of the Alphabets, numbers and other characters, even for Chinese or Japanese characters, can be used. In cases of this type it is only necessary to change the configuration of the segments 24 (and the corresponding arrangement of the light-emitting diodes on the base 10) set up and selected so that a corresponding selective activation of the Diodes to activate the characters provided for the display takes place. Such hatreds are known per se, so that a more detailed description is superfluous in this context.

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Claims (8)

Expectations .! Device for selective display of alphanumeric characters, with several separate, light-emitting diodes, which, when electrically activated, correspond to a point light source form a segment of the characters to be displayed, characterized by a pad on which several light emitting diodes in the general shape of the for the representation of the to be displayed alphanumeric characters next to each other are arranged a top piece arranged on the base with two opposite parallel surfaces, the first of which is the base is facing several light tubes designed in the shape of the character segments, which extend through the top piece from the first surface Extend completely to the opposite surface, each aligned with an associated diode and with reflective Walls are provided so that the light emitted by an electrically activated diode passes through the light tube assigned to it, and a compound lens which covers the second surface of the attachment piece and has individual lenses arranged close to one another in the manner of a fly's eye, and at least the find all light tubes on the second surface of the top section so that the light from each electrically activated, light-emitting diode passes through the corresponding light tube and then passes through the compound lens and all segments of the alphanumeric characters are optically reproduced on the lens, which are caused by the electrical activation of one or more of the light emitting diodes were chosen. Λ09823 / 0705 2. Device according to claim 1, characterized in that the The top piece is made of plastic 3. Device according to claim 1 or 2, characterized in that that the walls of the light tubes with a reflective metal are covered. 4. Device according to one of claims 1 - 3 »characterized in that that the surface of the pad opposite the top section has a non-reflective layer surrounding the light emitting diodes. 5. Device according to claim 4, characterized in that the _non-$ reflective layer is made of insulating · 6. Device according to one of claims 1 -5, characterized in that the segments of the characters are arranged in the form of 4ner composite digits. 7. Device according to claim 6, characterized in that the composite digit contains a decimal point. 8. Device according to one of claims 1 - 7 »characterized in that that the second face of the top piece is not one having reflective coating. s ff \ f * & (T ") £% ■ & fc $ ^ \ " T f \ f "* 4 0 S 8 2 S / 0 7 Q 5 Blank page