UA77443C2 - Three-dimensional electroluminescent screen of a display and a method for producing the screen - Google Patents

Abstract

The three-dimensional electroluminescence display comprises a main body (1) and an electroluminesccnce device (20) Said electroluminescence device (20) compriscs a film (2) and an electroluminesceni arrangement (10) which together form a whole. The surlace of the film (2), lacing the electroluminestent arrangement (10) is provided with the motifs (9) for display. The cleclroluminescent arrangement (10) comprises a from electrode (11) and a back electrode (12), between which a dielectric (13) is located. The from electrode (11) is provided with the layer which produces the molif (9) and is embodied in one piece with the same. A supply source (15) is arranged within the surface of the electroluminescence device (20), which contacts the electrodes (11,12) of the electroluminescence device (20).

Description

Description of the invention

This invention relates to a three-dimensional electroluminescent display screen having a transparent front 2 and an electroluminescent device located behind it.

In general, a three-dimensional electroluminescent display screen of this type is known. Such a display screen has the form of a transparent canvas. The front part of the display screen has a luminescent opaque layer on which graphics, symbols, etc. can be displayed. In order to protect the images, the front part is covered with a protective layer, for example, made of transparent hard resin. An electroluminescent device or a fluorescent lamp is installed up to 70 sides of the canvas, located at a distance from the image. The specified ZL-lamp is equipped with fastening elements in the form of clamps or clamps, one of which is connected to one of the electrodes of the L-lamp, and the other - to its second electrode. Electrical power is supplied to the Zl-lamp through the mentioned clamps or clamps.

The front part of this previously known device has a rather complex design due to the need to use many layers. Moreover, of course, it is necessary that the display screen is not flat. This condition 72 is caused by the need for the display screen to have windows or recesses, the sides of which must be luminescent. For this purpose, the LED lamp must be moved from the front of the display screen towards the side walls, thus limiting the indicated windows. The curvature of the inner region of previously known designs of display screens is limited, as cracks can form in it due to its layered structure.

The minimum achievable radius of the curved part of these display screens is approximately bmm. This radius is too large, for example, for devices used in cars. The attachment of the aforementioned clamps to the electrodes of the Zl-lamp also poses a problem because said electrodes are formed in very thin layers, while the fasteners are relatively thick strips of material compared to the electrode layers.

The task of the invention is to get rid of these and some other disadvantages of the existing device. with

This object in relation to the design of the typical three-dimensional electroluminescent display screen mentioned above (3) is achieved by the present invention, characterized in the distinctive part of the independent clause 1 of the claims.

The essence of the present invention is explained in more detail with reference to the following figures:

Figure 1 shows a top view of the front part of one of the elements of a known three-dimensional electroluminescent display screen; "AND

Figure 2 shows a vertical section of the structural part of Figure 1;

Figure C shows a cross-section of an element of a semi-finished product, the further processing of which leads to the C design of the display screen shown in Figure 1; Cha

Figure 4 shows a section of the semi-finished product shown in Figure C after heat treatment; 3o Figure 5 shows a cross-section of the semi-finished product shown in Figure 4, after molding on the back of the corresponding material by pressure molding, which forms the main body of the display screen according to the present invention;

Figure 6 shows a cross-section of the mold in which the body is manufactured according to Figure. 5; "

Figure 7 shows a cross-sectional view of an element of the display screen portion of Figures 1 and 2 in which junction 50 is located; c Figure 8 shows a section of an element of one of the end sections of the display screen according to Figures 1 and 2,

From" where similar junctions are located;

Figure 9 shows a cross-section of the power supply compartment located in the display screen housing;

Figure 10 shows a vertical cross-section of the curved profile of the display screen of the present invention.

Figure 1 shows a top view of the front part of one possible embodiment of the electroluminescent display screens of the present invention. The electroluminescent display screen of this -I design is here and further in the text also called the 3rd display screen for brevity. Figure 2 shows a vertical cross-section of the display screen 3 of Figure 1. The housing of the display screen 1 is substantially flat and equipped with an electroluminescent device 20. This device 20 mainly covers the front part 103 of the housing 20 and allows for the projection of the necessary images, graphics , drawings, numbers, etc., using the electroluminescent effect. The specified body 1 is made of the appropriate plastic, preferably by injection molding. For example, acrylonitrile butadiene-styrene (ABS) thermal polymers can be used.

A recess 101 having a circular outline is formed in the front part 103 of the body 1 Zl of the display screen of the present invention. This recess 101 has a circular side wall 102, the inner surface of which is practically

GF) is perpendicular to the main plane or the front wall 103 of the main body 1. The inner surface of the side wall 102 of the recess 101 connects to the front wall 103 of the body 1. The peripheral side wall 102 thus extends downward and backward from the front wall 103 of the main body 1 Figure 2 shows that a portion 201 of the electroluminescent device 20 extends into the recess 101 in the main body 60 1 and covers a portion of the inner surface of the side wall 102 adjacent to the recess 101.

In addition, the recess 101 has a bottom 105, which in the considered embodiment is located approximately at half the height of the peripheral side wall 102 of the recess 101. In the middle of this bottom 105 there is an opening 106, through which, for example, the axis of the potentiometer (not shown in the Figure) can pass . A transferable control button can be installed on the protruding part of the potentiometer axis. The track, 107, which expands because (Figure 1) and runs almost parallel to the wall of the recess 102, indicates the direction in which the control variables, such as volume, are increased.

Recess 7, located in the back part of the case with an opening in the direction of the back wall of the device.

Said recess 7, as a rule, has a square shape. In this case, the recess 7 is limited on the edges by four walls 43 directed to the back wall of the section 103 of the housing 1. The recess 7 is intended for installation of the power supply unit 15 to provide power supply to the electroluminescent device 20. In the case shown in Figure 2, the recess 7 is located under indicated recess 101. Figure 2 also shows the contact pins 17 and 18, through which the DC voltage 128 is supplied to the power supply unit 15. The indicated contact pins 17 and 18 are located on that side of the power supply unit 15, which is located 7/o Distance from the electroluminescent device 20.

Figure C shows a vertical section of the section of the structure of the electroluminescent device 20 shown in Figure 2. The electroluminescent device 20 consists of a front transparent, or at least semi-transparent, and volumetric part 2 in the form of a film, shown in the upper part of Figure 3. The film 2 should have the property thermoforming Plastics suitable for the production of such films 2 are widely known. 7/5 For example, we can recall the film under the trade mark "Mcgo! 9" of the company Vaueg AS, as a representative of other similar materials as well. To achieve a certain effect, film 2 can also be implemented by means of a multi-layer construction.

On the lower or reverse side of the film 2 shown in Figure 3, a two-dimensional image layer 9 is produced. For example, the specified image layer 9 can be three-dimensional graphic images in the form of symbols, numbers, etc. The content of such image layers 9 is determined by discrete elements 8, which are located sequentially at defined intervals in the form of windows 81. The light passing through the window 81 between the image elements 8 onto the film 2 reproduces the content of the image layers 9. In the section shown in Figure 3, the depicted elements 8 appear in the form of discrete lines drawn on the reverse side of the film 2. Therefore, these imaging layers 9 are located inside the electroluminescent device 20, where they are protected from friction and various damages, for example, when setting film 2 before these images.

The reverse side of the film 2 and, accordingly, the back side of the image layer 9 are directed directly to i) the luminescent device 10, which in the illustrated example is an electroluminescent device, which will be called the Zl-apparatus or the Zl-lamp 10 for the sake of brevity. - the lamp 10 has two surface electrodes, namely the front 11 and the back 12, which are at a distance from each other. Between these electrodes 11 and c 12, a dielectric 13 is inserted, which has the property of emitting light when the operating voltage is applied to the surface electrodes 11 and 12 of the ZL-lamp 10. On the back surface of the ZL-lamp 10, a covering layer 14 made of insulating material is applied. "Mr

In the manufacture of the device according to the invention, the electroluminescent device 20 is first manufactured.

At the first stage of the production process, film 2 is formed. This means that film 2 is first installed in a flat, undeformed form. This film then plays a leading role in the ZL devices 20 and 10. One or more image layers 9 are reproduced on the back side of the film 2, for example by printing. In the next production stage, the first, that is, the front surface electrode 11 of the LED lamp 10 is installed on the reverse side of the imaging layers 9 and in the corresponding sections of the reverse side of the film 2, which remain uncovered between the imaging elements 8. This can be done according to a generally known method. " 420 When choosing a technique, it is necessary to consider that the front surface electrode 11 is glued to the film as 7-3) as firmly as possible. Moreover, the front surface electrode 11 should be made not only of conductive but also of transparent or at least translucent material. Material of the front surface electrode 11;" must be an organic or inorganic conductive material, such as "Wauigop" and/or polyaniline, and/or polypyrrole modified by adding highly flexible fibers based on PU, PMMA, PVA.

Next, another layer 13 is applied to the front surface electrode 11. This layer should contain the above-mentioned dielectric material, which may include mixtures of 7n, cotton wool and the above-mentioned flexible fibers.

Finally, a third layer is applied to the free back surface of the indicated dielectric layer 13, which

Sh- forms the back electrode 12, which can be made of organic or inorganic conductive material, for example, "Wauigop" and/or poly aniline and/or polypyrrole, modified by adding very flexible fibers based on PU, PMMA, PVA. In order to improve the electrical conductivity, silver or carbon can be added to the material of the mentioned layer 12, and one more layer containing the mentioned materials can be additionally applied. 4) At the end, a protective layer 14 is applied to the back of the LED lamp 10.

Since the electroluminescent device 20 is subjected to further processing in the subsequent manufacturing process, it is very important that the individual layers of the electroluminescent device 10 are glued together as firmly as possible. The composition of the layers 11, 12, 13, 14 described above ensures not only the bonding of the mentioned layers with each other without displacement, but also should allow the layers to stretch, which was unattainable until now.

F) The electroluminescent device 20, in which the EL-lamp 10 is firmly attached to the film 2, is now thermoformed, pressed, embossed-pressed, hard-pressed (Figures 2 and 4). The electroluminescent device 20, which is formed in this way, may also have a height 3 and a depth 4 (Figure 2). The thickness of such sections Z and 4 El of the device 20 is practically equal to the thickness of its non-deformed section 5 (Figure 2).

During the deformation of the electroluminescent device 20, it is even possible to make holes in it without adversely affecting its functional capacity. Figure 4 shows sections of the EL device 20 in a vertical section, having such holes 110. These holes 110 have a circular contour, which, in combination with the protrusion 201, forms a short cylindrical section. The wall 111 or the walls of this projection 201 are located 65 almost at a right angle to the end surface 29 of the electroluminescent device 20.

The projection 201 was formed from that part of the material of the electroluminescent device 20, which is located in the middle of the indicated contour of the hole 110 and which was drawn into the hole 110 by thermoforming.

The rounded transition section 6 (Figures 4 and 10) of the electroluminescent device 20 is located between the projection 201 and the flat section of the electroluminescent device 20, which covers the hole 110. The radius of curvature of the indicated transition section 6, which protrudes from the end surface 29 of the electroluminescent device 20, as well as the side surface 111 of the specified protrusion 201 can be very small in size. Due to the immovable bonding of layers 2, 9, and 11, 12, 13, and 14 to each other, as well as due to the possibility of stretching the specified layers 2, 9, and 11, 12, 13, and 14, which was not achievable before, the radius of curvature of the transition section 6 can be produce less than 1 mm without cracks that could occur in the layers of the electroluminescent device 20. Moreover, the wall 111 of the protrusion 201 7/0 can be located almost at a right angle o, that is, perpendicular to the end surface 29 of the electroluminescent device 20.

The dielectric 13 forms a rather thick layer compared to the electrodes 11 and 12 of the electroluminescent device 20.

The dielectric layer 13 may contain a plurality of layers superimposed on each other. The corresponding part 7/5 of the transition section b of the electroluminescent device 20 is shown on a large scale in Figure 10.

The electroluminescent device 20 shown in Figure 10 has a dielectric layer 13 consisting of three layers 131, 132 and 133, which can be made of the above or other dielectric materials. In the manufacturing process of the electroluminescent device 20, the layers 131, 132 and 133 are properly separately deposited on the front surface electrode 11 and the corresponding pre-deposited layer.

The lower edge 115 of the projection 201 is not covered. Due to the strong bonding of the individual layers of the electroluminescent device 20 by overlapping and gluing, which has already been discussed, and due to the creation of its high elasticity, the electroluminescent device 20 retains its original structure, or such a structure that the front section 103 has and also thermoformed area 201. Therefore, the cylindrical inner surface 111 of the indicated protrusion 201 can also emit light generated with the electroluminescent lamp 10.

In this embodiment of the present invention, the free end 115 of the protrusion 201 can be constructed in such a way that the surface electrodes 11 and 12 do not reach the cut end 115. The ends of both front 11 and rear 12 surface electrodes are located at a distance from the cut end 115. On the contrary, both covering 14 and dielectric 13 layers are installed directly in the section of the cut end 115. This creates a safety advantage precisely in that the surface electrodes 11 and 12, which have a relatively high electric potential, will not be able to contact each other, because their free ends are covered with at least an insulating material in the cover layer 14. Moreover, the layers 13 and 14, reaching the cut end 115, do not allow moisture to penetrate into the spaces between the individual layers of the electroluminescent device 20.

After thermoforming, the body 1 is pressed against the reverse side of the electroluminescent device 20. -

This can be done with the help of a material that is used to hermetically form the back of the electroluminescent device 20 by injection molding. Some of such materials were mentioned above. On

Figure 5 shows a vertical section of the element of the device shown in Figure 2, in which there is a recess, which should be clearly aligned with the corresponding section of the body 1, in which there is a recess 201 in the form of a tubular section. It is assumed that the material of the main part 1 is applied to the outer side of the protrusion 115, the reverse side of which is hermetically formed by injection molding. 8 s Figure 6 shows a mold 30 in which the device shown in Figures 1 and 2 can be produced by injection molding behind the electroluminescent device 20. The indicated mold 30 has a bottom 31 and an upper 32 "" parts that are fitted to each other and which are directed so that, for example, they can be manipulated or moved in a straight line relative to each other in a known manner, when the shape of the ZO must be

Open or close. The first insert of the stamp 33 is located in the lower part 31 of the form, and the second insert of the stamp, respectively, in the upper part 32 of the form. The shape of the surface of the recess in the corresponding insert of the stamp 33 or 34 corresponds to the given shape of the surface of the side of the display screen that must be formed in the corresponding insert

The shape of the stamp 33 or 34. In the lower part 31 of the mold, channels 37 are made for the introduction and distribution of material in the recess of the mold.

The direction of the surfaces of the film 2 has already been given above in the description of Figure 2. The direction of the surface of the recess in the upper insert of the stamp 34 must correspond to the direction of the outer surface or front surface of the film 2. The same applies to the direction of the surface of the recess in the lower insert of the stamp 33.

At the same time, attention should be paid first of all to two protrusions 38 and 39, which are located at a distance from each other and protrude from the surface of the recess in the lower insert of the stamp 33. The height of the indicated protrusions 38 and 39 can be

Select in such a way that the end surfaces of the indicated protrusions 38 and 39 rest on the reverse side of the electroluminescent device 20 during the execution of the sealing behind it by the method of injection molding. In iF) as a result, two channels remain free in this section of housing 1, the use of which will be described below. The above-mentioned power supply unit 15 includes an electronic part, namely, a converter 16, which converts a relatively low direct current voltage 128, for example, into a relatively high alternating current voltage, which is necessary for the operation of the EL lamp 10. In the described case, the specified converter 16 is built in the recess 7 of the specified housing 1 and is located in the appropriate place with the help of, for example, the fixing sleeve 44. Otherwise, the converter can be built only partially into the housing 1 of the display screen or it can work as an independent device.

The contact pins 17 and 18, mentioned above, protrude from the back wall of the converter 16 and can partially protrude from the housing 1. The terminals of a source of direct current voltage, for example, a battery (not shown), can be connected to the protruding parts of the pins 17 from the housing 1 and 18. The voltage required to operate the electroluminescent device 20 is 110V/400Hz, and the power supply unit is connected to the electroluminescent device 20 through contactors 21 and 22. (Figures 7, 8 and 9).

The first contactor 21 makes contact with the rear surface electrode 12 of the EL lamp 10. The second contactor 22 makes contact with the front electrode of the EL lamp 10. The first contactor 21 is located in the first channel 38 of the housing 1. The second contactor 22 is located in the first channel 39 of the housing 1. In the illustrated example, contactors 21 and 22 have a spring, coil spring 210 or 220, respectively. Springs 210 and 220 rest on one end of the output pin conductive contacts 211 and 221, respectively, of the converter 16. The other end of the spring 210 of the first contactor 21 rests on the rear surface electrode 12 of the EL lamp 70.19. The second end of the spring 220 of the second contactor 22 rests on the front electrode 11 of the EL lamp 10.

The arrangement shown in Figure 7 refers to the case where the contactors 21 and 22 are pressed against the area of the EL lamp 10 where the surface electrodes 11 and 12 of the lamp 10 are not located one above the other. This can, for example, be in the end portion 42 of the EL lamp 10 shown in Figure 7. In the indicated end portion 42, the end end of the rear electrode 12 is at a greater distance from the edge 42 of the EL lamp 10 shown in Figure 7 than the front end of the front surface electrode 11. Only the cover electrode 14 reaches the end 42 of the EL lamp 10, and the electrode is made of electrically insulating material.

If the contact between the surface electrodes 11 and 12 of the EL lamp 10 must be made through the power supply unit 15 built into the middle of the EL lamp 10, in which the surface electrodes 11 and 12 are located one above the other, then a hole 43 must be made in the layer of the back surface electrode 12 for the introduction of that contactor 22, which must make contact with the front surface electrode 11. The size of the hole 43 in the rear electrode must be sufficient to avoid contact between the contactor 22 and the rear surface electrode 12. For this, it is sufficient that the hole 43 in the rear surface electrode 12 was sufficient to prevent the spring 220 of the contactor 22 for the front surface electrode 11 from contacting the rear surface electrode 12.

After manufacturing the main part 1 by injection molding from the back of the electroluminescent device sc dv 20, the latter is fastened to the housing 1. Then the indicated power supply unit 15 is inserted into the recess 7 of the housing 1, and is precisely fitted so that the contactors 21 and 22 can be inserted into the channels 38 and 39 of the housing i) 1. Then the power supply unit 16 is inserted into the recess 7 until the front ends of the springs 210 and 220 rest against the conductive layer of the electrodes 12 and 13 of the electroluminescent device 10. After that, the power supply unit 15 must be fixed in this position, for example, by suitable glue or similar means. Figure 8 shows another option for embedding the power supply unit in the housing 1. In this case, a significant part of the power supply unit is inserted into the housing 1. For such a layout, a planar adapter 46 is used, the channels 48 and 49 of which protrude perpendicularly to the main contact areas of the planar "g" adapter 46. Said planar adapter 46 has channels 48 and 49 extending perpendicularly to the main contact areas. One of the large contact areas of the adapter 46 is glued with the covering layer 14 in.

EL lamps 10. Then the power supply unit 15 is attached to the adapter section 46 so that the corresponding spring 38 or 39 of the power supply unit passes through one of the channels 48 or 49, respectively, so that the front end rests against the corresponding surface electrode 11 or 12 EL-lamps 10. The front wall of the converter 16 is glued to the large plane of the adapter 46, located at a distance from the EL-lamp 10. The semi-finished product made in this way can be inserted into the mold 30 and the material behind the body 1 can be formed by injection molding. In this case, the lower part 31 of the form Z0 is formed so that the material of the case 1 also with c is located behind the converter 16 and that only the parts of the pins 17 and 18, to which the voltage is applied. direct current, protruded from the indicated material of the case 1. and? The display screen includes a main body 1 and an electroluminescent device 20. Said electroluminescent device 20 contains a film 2 and an electroluminescent lamp 10, which together form a solid structure. The surface of the film facing the electroluminescent lamp 10 is equipped with the specified -I images 9. The electroluminescent lamp 10 contains front surface 11 and rear surface 12 electrodes, between which a dielectric 13 is located. The front surface electrode 11 is pressed against the layer,

Sh- which reproduces the image layer 9, and forms an integral structure with this layer. The power supply unit 15, which forms their contact with the surface electrodes 11 and 12 of the electroluminescent device 20, is placed in the middle of the 5r of the electroluminescent device 20.

Claims (10)

The formula of the invention 1. A three-dimensional electroluminescent display screen, including a transparent front part (2) of an electroluminescent device (20) and an electroluminescent lamp (10) located behind it, (Ф) which is characterized by the fact that at least the layers of the electroluminescent device (20) are immovably fastened together with strength sufficient to withstand the high curvature of the circuit of the electroluminescent lamp (10) without damage. in 2. Three-dimensional electroluminescent display screen according to claim 1, which is characterized in that the electroluminescent lamp (10) additionally has two surface electrodes (11, 12), which are located with a gap in which a dielectric (13) is inserted, which has the property of emitting light by supply of operating voltage to the surface electrodes (11 and 12). 3. Three-dimensional electroluminescent display screen according to claim 1, which is characterized by the fact that the specified transparent b5 front part (2) has the appearance of a film, a two-dimensional imaging layer (9) is applied to the lower or reverse plane of the film (2), in which the front surface electrode is installed (11) electroluminescent lamp (10). 4. Three-dimensional electroluminescent display screen according to claim 2, which is characterized in that the outer plane of the back surface electrode (12) of the electroluminescent lamp (10) is covered with a covering layer (14). 5. Three-dimensional electroluminescent display screen according to claim 1, which is characterized in that the main body (1) is attached to the outer plane of the electroluminescent device (20). 6. Three-dimensional electroluminescent display screen according to claim 5, which is characterized by the fact that it additionally has at least one recess, at least one side wall of which is practically perpendicular to the front plane of the main body (1), behind the front wall of which there is an electroluminescent lamp (10), which 7/ 0 extends into the recess and rests on its side wall. 7. Three-dimensional electroluminescent display screen according to claim 1, which is characterized by the fact that it is additionally equipped with a converter (16) capable of converting direct current voltage into alternating current voltage, and the converter (16) is made with the possibility of at least partial introduction into the material of the main body (1) of the display screen, and the outputs of the converter (16) are connected to the electroluminescent lamp (10). 8. The method of manufacturing a three-dimensional electroluminescent display screen according to claim 1, which is characterized by the fact that a film (2) with a practically flat surface is produced, on one of the parts of which an image layer (9) is made, and an electroluminescent lamp is attached to this film (2) 10) so that the front surface electrode (11) of the specified electroluminescent device (20) is located on that side of the film (2) on which the imaging layer (9) is made. 9. The method according to claim 8, which is characterized by the fact that the electroluminescent device (20) is manufactured by thermoforming. 10. The method according to claim 9, which is characterized by the fact that plastic is applied to the reverse side of the thermoformed electroluminescent device (20) by injection molding. 6) (ze) « « y - - and? -i -i sh» sh» syu» ime) 60 b5