WO2015067244A1 - Anzeigevorrichtung zur darstellung von informationen in fahrzeugen - Google Patents
Anzeigevorrichtung zur darstellung von informationen in fahrzeugen Download PDFInfo
- Publication number
- WO2015067244A1 WO2015067244A1 PCT/DE2014/100393 DE2014100393W WO2015067244A1 WO 2015067244 A1 WO2015067244 A1 WO 2015067244A1 DE 2014100393 W DE2014100393 W DE 2014100393W WO 2015067244 A1 WO2015067244 A1 WO 2015067244A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tft module
- transflective
- tft
- module
- display
- Prior art date
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 19
- 239000002184 metal Substances 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 10
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 239000011521 glass Substances 0.000 claims description 7
- 238000010030 laminating Methods 0.000 claims description 7
- 239000011888 foil Substances 0.000 claims description 6
- 239000005336 safety glass Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000005286 illumination Methods 0.000 abstract 2
- 239000010408 film Substances 0.000 description 17
- 238000005516 engineering process Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000003086 colorant Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000003098 cholesteric effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/35—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being liquid crystals
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F21/00—Mobile visual advertising
- G09F21/04—Mobile visual advertising by land vehicles
- G09F21/048—Advertisement panels on sides, front or back of vehicles
Definitions
- Display device for displaying information in
- the invention relates to a display device for displaying information in vehicles, having a front side, a rear side, a display and a backlight source, wherein the background light generated by the backlight source penetrates the display from its rear side and reaches the front side and an associated method for its use ,
- color representation not possible.
- the color representation is indispensable in many cases or at least desired as an essential feature.
- TFT thin film transistor
- the ambient light tolerance and the luminance of the TFT modules were not sufficient for outdoor use. At least in bright sunlight, they could not be read.
- TFT modules such as 4: 3, 16: 9
- the invention is therefore an object of the invention to provide a display device for vehicles in outdoor use with high ambient light tolerance.
- the invention proposes that
- the display is a TFT module
- the merit of the invention is to have recognized that, contrary to the view taken in professional circles, the use of TFT modules for vehicles in outdoor use are well suited, if additional and subsequently explained in detail measures are taken.
- the most important feature is the attachment of a transflective device to the TFT module, which has both transmissive and reflective properties.
- transflective The device, which has both transmission and reflection in the range of optical wavelengths, is referred to as transflective.
- This and other embodiments of the invention also luminance and temperature tolerance are improved, so that the TFT module is even more suitable for outdoor use.
- a backlight source is provided, which may be an LED whose light, referred to below as background light, penetrates the TFT module due to the transmission characteristic and after penetration the front of the TFT module, also referred to as the short front, arrives at a viewer.
- the ambient light source for example the sun, the sky, but also lamps whose light, referred to below as ambient light, illuminates the TFT module from the front side and, after passing through the TFT module according to the invention, is located in the transflective device is reflected.
- the transflective device may be part of the back of the TFT module. Appropriate development and production are usually eliminated due to the need for moderate quantities and therefore high unit prices. Therefore, a transflective film is provided as transflective device, which is applied to the back of the TFT module. Transflective films are also referred to as semi-transparent films for light. However, care should be taken to ensure that non-transmitted light is not absorbed, but reflected, so that backlighting is still possible.
- Reflection is possible on metallic mirror surfaces or on dielectric mirrors. These two different reflection mechanisms can be used in the transflective device.
- the TFT module on the rear side or the transflective foil on the rear side of the TFT module is equipped with metallic mirror surfaces to generate the reflection property through metallic mirror surfaces.
- metallic mirror surfaces can be produced, for example, by sputtering of reflective metal or application of a mixture of particles of reflective metal foils and a transparent, drying after application of the mixture adhesive.
- Another possibility is the introduction of mirroring metal dust into the transflective film. While, by the above techniques, the transflective device is randomly provided with reflection sites and thus reflective property throughout the transflective device this also possible in a structured or regulated manner.
- the transflective sheeting may be patterned to strongly reflect on a particular portion of each individual pixel of the TFT module, such as the half of the pixel underlying the TFT module, while transmitting as well as possible on the remainder of that pixel.
- the reflection layer structured in this way can optionally be applied on both sides of the transflective film, one of which is glued to the back of the TFT module.
- Other similar methods and arrangements known in manufacturing technology may also be used to create the reflective property through metallic mirror surfaces in the transflective device.
- the coordination between size and number of metallic mirror surfaces on the one hand and the intervening gaps on the other hand causes the desired relationship between reflection property and transmission property.
- the transflective device is formed as a dielectric mirror or provided with at least one dielectric mirror.
- the transflective device is formed as a dielectric mirror or provided with at least one dielectric mirror.
- One possibility is vapor deposition or other wide application of a material on the back, whose refractive index is significantly higher than that of the back of the TFT module, which in turn is usually higher than that of air.
- large refractive index jumps occur at the interfaces, which ensure a sufficiently strong reflection property of the transflective device.
- the TFT module Due to the reflection of the transflective foil, the TFT module is easy to read even when exposed to sunlight. At the same time, the transmittance of the transflective sheeting is selected so high that background light emitted by the backlight source easily penetrates the TFT module. This ensures the readability of the TFT module even in the dark. Compared to a TFT module, which is purely reflective and not designed to be transmissive, thereby increasing the luminance.
- An expedient development of the invention is to detect the external luminance with a light sensor and to regulate the optimization of the optical reproduction of the information.
- the measuring signal of the light sensor is used in an electronic works and sets the transmission property accordingly.
- a preferred position of attachment of the sensor is - without limitation of generality - the reflector.
- the TFT module is provided with a windshield made of laminated safety glass into which an infrared-reflecting film with high transmission in the visible light range is integrated. This is located inside the windscreen and / or between the windscreen and the surface of the TFT module.
- the outer layers are glass layers. This inventive measure reduces to a considerable extent the heating of the TFT module in sunlight, which would otherwise lead to color changes.
- a suitable laminated safety glass with integrated infrared-reflective film is, for example, Siplex Solar Control of the glass works Haller GmbH. It reflects infrared light to a great extent but transmits visible light very well.
- the metal housing which surrounds the TFT module and engages in a section of the windshield, provided with an infrared-reflective coating.
- the infrared-reflective coating is applied to the outside of the metal housing, which faces the viewer. The infrared-reflective coating reduces this
- TFT modules are produced in large quantities in standard sizes, for example with an aspect ratio of 4: 3 or 16: 9, and are referred to in the following as TFT standard modules.
- TFT standard modules For certain application Cases, such as page indicator and front indicator in trains and buses, is often required a different aspect ratio, namely much wider than high, so long station names such as Garmisch-Partenmaschinen and train runs can be fully displayed.
- Custom-made TFT modules with a high aspect ratio are usually eliminated because of moderate quantities required and therefore high unit prices.
- a large aspect ratio of the TFT module is achieved by tailoring a TFT standard module to the required display area. When cutting, a cut edge is created on the desired TFT module, which was originally part of the TFT standard module. Flanking the control, consisting of hardware and software, adapted to the new number of pixels. A TFT standard module with 1920x720 pixels can be replaced by a cut to a TFT module with z. B.
- TFT module Be cut to 1920x240 pixels.
- the default height - meaning an initial information display height - is thereby reduced from 720 pixels of the TFT standard module to 240 pixels in the TFT module.
- several TFT modules with the required display area and display height can be obtained by one or more parallel cuts through the TFT standard module.
- a screwing, latching or similar fastening operation of the TFT module on the metal housing is possible.
- the TFT module is attached to its front by means of an op- clear laminated film laminated to the windscreen.
- the reflections between the front screen and the TFT module are advantageously reduced by the optically clear laminating film.
- the absence of direct contact between the metal housing and the TFT module advantageously reduces heat transfer from the metal housing to the TFT module.
- the backlighting source becomes laterally, i. H. mounted on the narrow end faces of the TFT module.
- This lateral, that is laterally mounted backlight source has light emitting diodes (LED).
- the LED elements are arranged on the side of the TFT module so that they radiate laterally.
- a background light reflector is provided and optimized, which prevents backlighting of the background light.
- Fig. 1 display device in cross section
- a TFT module 1 in cross section, in addition to other components of the invention.
- the TFT module 1 has a front side 1 1 and a rear side 12.
- a transflective device 2 is attached on the back 12. It has both transmission property 21 and reflection property 22.
- It is embodied as a transflective film 23, over the surface of which 12 metallic mirror surfaces 24 with reflection property 22 are distributed in the region of the entire rear side.
- the metallic mirror surfaces 24 are so small that they are barely visible to the naked eye. They are produced by a suitable manufacturing process, which is well known in transflective films 23. Gaps 25 with a transmission property 21 occur between the metallic mirror surfaces 24.
- the transflective device 2 has a high refractive index, for example with a value between 3 and 5, so that it has at its interfaces, one of which is the back 12 of the TFT module 1, pronounced reflection characteristic 22 and acts as a dielectric mirror 26 , In any embodiment, however, the reflection factor is clearly less than 1, which is why the transflective device 2 also has a transmission characteristic 21.
- a windscreen 4 made of laminated safety glass. It consists of three layers, the two outer layers being glass layers 42. The middle layer, which is thus located inside the front screen 4, is an infrared-reflecting film 41 with high transmission in the visible light range.
- TFT module 1 and front screen 4 are laminated together and therefore mechanically connected to one another by an interposed optically clear laminating 6th
- the front screen 4 is bordered by a cutout 51 of a metal housing 5 and thereby protected from damage to the sensitive sides.
- the metal housing 5 can be provided with bores, bolts, clamps and similar fastening possibilities.
- the TFT module 1 can also directly with the
- Metal housing 5 are connected, but this is usually superfluous when using the laminating film 6 and also would create a mostly unwanted thermal bridge.
- the metal housing 5 On its side facing the observer 34 52, the metal housing 5 is provided with an infrared-reflective coating 53.
- the TFT module 1 is illuminated by a backlight source 30.
- the backlight 31 emitted from the backlighting source 30 is transmitted through the transflective device 2 and the TFT module 1 thanks to the transmission characteristic 21, and reaches the viewer 34, displaying the information of the TFT module 1, as viewed from the TFT module 1
- Surrounding light source 33 such as the sun, outside the windshield 4 emits ambient light 32. This penetrates windshield 4, laminating film 6 and TFT module 1, is partially reflected at the transflective device 2 due to its reflection property 22, penetrates on the Return path TFT module 1, laminating film 6 and windscreen 4, to finally reach the viewer 34. Since both background light 31 and ambient light 32 may occur depending on backlight source 30 and ambient light source 33, the inventive task of providing a TFT module for outdoor use with high ambient light tolerance is achieved.
- FIG. 2 shows the metal housing 5 and the front window 4 in a front view, that is to say seen by the observer 34, so that one looks at one of the glass layers 42.
- the windscreen 4 is in the cut 51 of the metal housing 5 bordered.
- the metal housing 5 has on its outside 52 an infrared-reflecting coating 53.
- FIG. 3 shows a TFT standard module 10 in a front view, that is to say seen by the observer 34.
- the TFT standard module 10 with the standard height 16, which is effective for displaying are two sections 15 which separate a TFT module 1 from the TFT standard module 10 at the top and bottom.
- the separated TFT modules 1 each have a lower display height 14, because the standard height 16 is greater than the display height 14.
- Fig. 4 shows very similar to Fig. 1, a TFT module in cross section, but with an adapted backlight.
- the backlighting source 30 is in a deeper than in Fig. 1 executed metal housing 5 side of TFT module 1 and transflective device 2, but at the same time also seen by the viewer 34 from behind as the transflective device 2 mounted.
- the metal housing 5 is closed on the rear side seen by the observer 34 by a specular backlight reflector 35. It is bent in a V-shape in the direction of the transflective device 2 and the TFT module 1.
- background light 31 incident on the background light reflector 35 which is emitted by the backlight source 30, is reflected in the direction of the transflective device 2, from where it can reach the viewer 34.
- the background light 31 is shown in FIG. 4 only in the form of rays reaching up to the transflective device 2, although in reality they reach the observer 34 from there. LIST OF REFERENCE NUMBERS
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Business, Economics & Management (AREA)
- Accounting & Taxation (AREA)
- Marketing (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14809760.3A EP3066657A1 (de) | 2013-11-06 | 2014-11-05 | Anzeigevorrichtung zur darstellung von informationen in fahrzeugen |
DE112014005065.2T DE112014005065A5 (de) | 2013-11-06 | 2014-11-05 | Anzeigevorrichtung zur Darstellung von Informationen in Fahrzeugen |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE201310112219 DE102013112219A1 (de) | 2013-11-06 | 2013-11-06 | Anzeigevorrichtung zur Darstellung von Informationen in Fahrzeugen |
DE102013112219.1 | 2013-11-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015067244A1 true WO2015067244A1 (de) | 2015-05-14 |
Family
ID=52020881
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2014/100393 WO2015067244A1 (de) | 2013-11-06 | 2014-11-05 | Anzeigevorrichtung zur darstellung von informationen in fahrzeugen |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3066657A1 (de) |
DE (2) | DE102013112219A1 (de) |
WO (1) | WO2015067244A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015117234B3 (de) * | 2015-10-09 | 2017-02-16 | Visteon Global Technologies, Inc. | Displayeinheit und Verfahren zur Herstellung einer Displayeinheit |
DE102017129308A1 (de) | 2017-12-08 | 2019-06-13 | ANNAX GmbH | Bauelement mit integrierter Anzeigevorrichtung |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1984003778A1 (en) * | 1983-03-19 | 1984-09-27 | Bosch Gmbh Robert | Device for suppressing the reflections for liquid crystal displays |
EP1389775A2 (de) * | 2002-08-09 | 2004-02-18 | Sanyo Electric Co., Ltd. | Anzeige mit einer Vielzahl von Anzeigetafeln |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07318929A (ja) * | 1994-05-30 | 1995-12-08 | Casio Comput Co Ltd | 液晶表示装置 |
JP2004144982A (ja) * | 2002-10-24 | 2004-05-20 | Nitto Denko Corp | 液晶パネル、液晶表示装置及び半透過型光反射層 |
-
2013
- 2013-11-06 DE DE201310112219 patent/DE102013112219A1/de not_active Withdrawn
-
2014
- 2014-11-05 WO PCT/DE2014/100393 patent/WO2015067244A1/de active Application Filing
- 2014-11-05 EP EP14809760.3A patent/EP3066657A1/de not_active Withdrawn
- 2014-11-05 DE DE112014005065.2T patent/DE112014005065A5/de active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1984003778A1 (en) * | 1983-03-19 | 1984-09-27 | Bosch Gmbh Robert | Device for suppressing the reflections for liquid crystal displays |
EP1389775A2 (de) * | 2002-08-09 | 2004-02-18 | Sanyo Electric Co., Ltd. | Anzeige mit einer Vielzahl von Anzeigetafeln |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015117234B3 (de) * | 2015-10-09 | 2017-02-16 | Visteon Global Technologies, Inc. | Displayeinheit und Verfahren zur Herstellung einer Displayeinheit |
US10310329B2 (en) | 2015-10-09 | 2019-06-04 | Visteon Global Technologies, Inc. | Display unit and method for producing a display unit |
DE102017129308A1 (de) | 2017-12-08 | 2019-06-13 | ANNAX GmbH | Bauelement mit integrierter Anzeigevorrichtung |
Also Published As
Publication number | Publication date |
---|---|
EP3066657A1 (de) | 2016-09-14 |
DE102013112219A1 (de) | 2015-05-07 |
DE112014005065A5 (de) | 2016-09-29 |
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