DE20311135U1 - Organic LED display for use as a touch sensitive display screen in mobile applications, whereby a support plate has one more self illuminating output units on its rear side and contact-sensitive input elements on its front side - Google Patents

Abstract

Capacitive contact-sensitive organic LED display for mobile applications including information display and command input. Said display has a support plate with one or more self-illuminating output and or display units on its rear side and one or more contact-sensitive input elements and additional operating buttons on its front side. The display can use organic layers of low-molecular weigh organic substances (OLED) and or long chain polymers (PLED).

Description

Richard Wöhr GmbH

Graefenau 58 - 60

75339 Hofen

Capacitive touch-sensitive OLED display for mobile applications

The invention relates to a capacitive touch-sensitive OLED display for information presentation and operation in mobile applications such as motor vehicles, trains, aircraft or the like.

A display device with a lighting device for motor vehicles is known from WO 96/23200. A light source containing an organic light-emitting substance is used as the lighting device, whereby letters are punched out of a flat material of the light source, so that a combination of display and lighting is achieved, although variable information representation is not possible in this case.

It is also known to use displays for secondary instrumentation in motor vehicles, such as clocks, radios, on-board computers, navigation systems, etc. in the form of passive liquid crystal displays (LCDs) and TFT displays with active matrix control. Due to the lack of luminosity, these display systems require backlighting, which requires high energy consumption and complex brightness control.

DE 197 08 610 A1 discloses a pixel matrix display device in which pixels are implemented using organic light-emitting elements. Only one display is possible here. For operation, additional control elements are integrated in the form of buttons, which are not integrated in the display. This means that additional elements are required.

It is therefore an object of the invention to produce a capacitive touch-sensitive OLED display which has a low power consumption, does not require a backlight, has a higher contrast, is self-luminous, and has the best viewing angles and in which the operation takes place by means of the display device and is integrated in the display device.

This object is achieved according to the invention in that a display element with light-emitting diodes based on organic semiconductors is applied to the back of a glass and/or plastic substrate, which serves as a carrier substrate, and a capacitive touchscreen system is applied to the front, wherein low-molecular substances (OLED) and/or long-chain polymers (PLED) are used as organic layers for the display element and the touchscreen is designed as a capacitive multi-layer system in which the glass substrate is coated with a transparent metal film which is protected by means of a melted glass layer.

The solution according to the invention has the advantage that an extremely flat, self-illuminating and touch-sensitive display and operating device is created on just one transparent and/or translucent carrier substrate, which can be used very well as an input and output option for transport devices. The display is also characterized by high contrast, good viewing angle, low power consumption, high brightness and fast image generation without streaks and shadows.

A preferred embodiment of the self-luminous touch-sensitive display has a glass plate as a carrier substrate on which an OLED display (organic light emitting diode) is applied in the area of the display device on the back, wherein the OLED display is constructed in such a way that a thin, organic layer sequence consisting of hole-transporting material, emitting material and electron-transporting material is embedded between two metallizations, a transparent anode made of transparent conductive indium tin oxide (ITO) and a metal cathode. A capacitive multi-layer touchscreen system is applied to the front of the carrier substrate, wherein the glass pane is coated on the front with a thin conductive layer of indium tin oxide, which is protected by a melted glass layer.

A further development is a PLED display (polymer light emitting diode). Instead of layers of low molecular weight substances, a layer sequence of long-chain polymers is used.

By using an organic light-emitting substance, no backlighting is required.

A further development enables the OLED display and the capacitive touchscreen to be adapted to the geometry and curvature of the substrate carrier, so that the capacitive touch-sensitive OLED display can be optimally adapted to the shape and geometry of the dashboard of mobile applications and transport devices.

Since the carrier substrate can be transparent, further development envisages installation in windows and mirrors so that display and operation via windows and mirrors is possible.

An advantageous further development of the invention provides that the front film of the touchscreen is larger than the input and output area, so that a continuous front is created and subsequent installation is also possible.

An advantageous further development of the invention provides that a keyboard based on a snap disk and/or on short-stroke keys and/or additional other input elements are integrated in the front panel and/or plate and/or the base element. This creates an expanded combined input and display device.

A further advantageous embodiment of the invention is achieved by integrating several input and/or output options on a carrier substrate plate, wherein the input and/or output options can be of the same and/or different type and also point in the same and/or different display directions.

Since the OLED surface is emissive, the viewing angle is 180°.
Further advantageous developments of the invention are the subject of the subclaims.

The invention is explained in more detail below using an embodiment with reference to the drawings.

Fig. 1: Section through a capacitive touch-sensitive OLED display

Fig. 2: touch-sensitive OLED display for dashboard

Fig. 3: All-in-one OLED display for display and operation
Secondary instrumentation with display and operation in the window

of primary and

Figure 1 shows a cross-section through the OLED display. On the back of a glass substrate and/or polymer film 1, between two metallizations, a transparent anode 2 made of transparent conductive indium tin oxide (ITO) and a metal cathode 3 (e.g. magnesium-silver alloy), a thin, organic layer sequence is embedded, which consists of hole-transporting material 4 (e.g. N,N'-bis-(-3-methyl-phenyl)-N,N'-diphenylbenzidine (TPD)), emitting material 5 (e.g. 8-hydroxyquinoline aluminum salt (AIQ3)), and electron-transporting material 6 (e.g. rubrene). On the front side, a transparent conductive indium tin oxide (ITO) 2 is also applied to the glass substrate 1 and is protected by a glass protective layer 7. A low alternating voltage is applied to the four corners of the conductive layer, which is evenly distributed over the surface via special electrode grids attached to each corner.

Figure 2 shows a touch-sensitive OLED display for a dashboard. The dashboard 14 has conventional display instruments 8 as well as capacitive touch-sensitive OLED displays 9 and OLED displays 10. The primary instrumentation such as speed, oil temperature, etc. is designed as analog display devices 8. Information such as radio, air conditioning, clock, navigation system, etc. is displayed via capacitive touch-sensitive OLED display 9 and/or OLED display siO. Other auxiliary devices such as control electronics 11, filters

as well as suitable housings 12 and/or enclosures for dust and moisture protection as well as cooling and/or heating devices 13 may be present.

Figure 3 shows an all-in-one OLED display for displaying and operating primary and secondary instrumentation with display and operation in the window. Both primary and secondary instrumentation are shown as a single and/or multi-part capacitive touch-sensitive OLED display 9 and/or OLED displays 10, with the buttons being operated via the touchscreen. By integrating displays in the side windows, an opening system using finger identification is possible, among other things. By integrating a computer, various multimedia functions can be implemented.

Claims (15)

1. Capacitive touch-sensitive OLED display for mobile applications for information presentation and operation, characterized in that one and/or more output units and/or display units in the form of a self-luminous display are applied to the back of a substrate carrier plate, and one and/or more analogue display systems and/or displays are integrated, and one and/or more touch-sensitive input options and additional buttons are arranged on the front. 2. Capacitive touch-sensitive OLED display according to claim 1, characterized in that a display element with light-emitting diodes based on organic semiconductors is used as the output option, wherein low-molecular substances (OLED) and/or long-chain polymers (PLED) are used as organic layers. 3. Capacitive touch-sensitive OLED display according to one of the preceding claims, characterized in that a capacitive touchscreen is used as the touch-sensitive input option. 4. Capacitive touch-sensitive OLED display according to one of the preceding claims, characterized in that capacitive and/or resistive touchscreens are used as touch-sensitive input options. 5. Capacitive touch-sensitive OLED display according to one of the preceding claims, characterized in that the substrate carrier plate is the carrier plate for the input and output option. 6. Capacitive touch-sensitive OLED display according to one of the preceding claims, characterized in that a glass pane and/or polymer film and/or mirror is used as the substrate carrier plate. 7. Capacitive touch-sensitive OLED display according to one of the preceding claims, characterized in that a safety glass pane is used as the substrate carrier plate. 8. Capacitive touch-sensitive OLED display according to one of the preceding claims, characterized in that the front film of the resistive touchscreen is larger than the output option and at the same time serves as a covering film for design fronts and/or film-covered keyboards. 9. Capacitive touch-sensitive OLED display according to one of the preceding claims, characterized in that the front film has a rear-side printing in the area outside the display device. 10. Capacitive touch-sensitive OLED display according to one of the preceding claims, characterized in that the output option on the substrate layer has two metallizations, a transparent anode made of transparent conductive indium tin oxide (ITO) and a metal cathode, wherein a thin, organic layer sequence is embedded between these two metallizations, which consists of hole-transporting material, emitting material, and electron-transporting material. 11. Capacitive touch-sensitive OLED display according to one of the preceding claims, characterized in that the capacitive touchscreen on the glass substrate also has a transparent conductive indium tin oxide (ITO), which is protected by a melted glass layer. 12. Capacitive touch-sensitive OLED display according to one of the preceding claims, characterized in that a display and operating unit serves as an opening device via finger identification. 13. Capacitive touch-sensitive OLED display according to one of the preceding claims, characterized in that a computer is used for control. 14. Capacitive touch-sensitive OLED display according to one of the preceding claims, characterized in that several touch-sensitive OLED displays are connected to a computer. 15. Capacitive touch-sensitive OLED display according to one of the preceding claims, characterized in that the shape and design of the capacitive touch-sensitive OLED display can be designed according to the requirements.