DE20312635U1 - Self-illuminating touch-sensitive display - Google Patents

Abstract

Self-illuminating touch-sensitive display has an output unit on a substrate plate (1), preferably a glass plate in the form of a self-illuminating display, and a touch-sensitive input unit on the front side.

Description

Richard Wöhr GmbH

Graefenau 58 - 60

75339 Hofen

05.06.03 Self-illuminating touch-sensitive display

The invention relates to a self-luminous touch-sensitive display with input and output options in computer systems and/or computer-like systems and/or electronic devices and/or controls.

Up to now, mainly touch-sensitive screens and touch displays have been used for input and output. The touch-sensitive screens consist of a display part and an operating part, with a monitor being used as the display part and a curved resistive touchscreen as the operating part, and these two components are connected to one another using a frame and/or housing and/or similar systems so that simultaneous input and output is possible. The disadvantage of this solution is the enormous depth of the monitors, which requires a large housing. Another disadvantage is that two parts are connected to one another using a mechanical part, which is very time-consuming and therefore very expensive.

Touch-sensitive displays use a TFT display as the display unit and a resistive touchscreen as the control unit. Here, too, the two components are connected to one another using a frame and/or housing. Here, too, the depth is a disadvantage, although it is not as deep as with monitors. In addition, two parts are connected to one another using a mechanical part, which is very time-consuming and therefore very expensive. Other disadvantages here are the low contrast, the slow image build-up, the poor viewing angle and the high power consumption of the LCD displays.

There are also known solutions in which the touchscreens are glued directly onto the TFT display. These solutions also have a large installation depth and require a high driver voltage.

It is therefore an object of the invention to produce a self-luminous touch-sensitive display of the type mentioned above, which consists of only one component and which has a higher contrast, is self-luminous, has the best viewing angles, has a high switching speed and requires a low driver voltage.

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 substrate, which serves as a carrier substrate, and a resistive 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 polyester-on-glass construction.

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 electronic devices, and can also be used as a display device for computers and televisions, etc. 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 is embedded between two metallizations, a transparent anode made of transparent conductive indium tin oxide (ITO) and a metal cathode, which consists of hole-transporting material, emitting material, and electron-transporting material. A resistive touchscreen system in a sandwich construction is applied to the front of the carrier substrate, wherein the glass pane is on the front and the

The back of the front film is coated with a thin conductive layer of indium tin oxide and the front is made of polyester and is separated from the carrier substrate by spacers.

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.

An advantageous further development of the invention provides that the front foil is larger than the input and output area, so that a continuous front is created.

An advantageous further development of the invention provides that the front film has a rear-side print in the area outside the input and output area, so that the protruding film can be used as a covering film for film-covered keyboards and/or can be used as a design film.

A further advantageous embodiment of the invention provides that the film is applied to a front panel and/or plate and/or base element, wherein a depression and/or recess is integrated in the front panel and/or plate and/or base element in the region of the display device.

An advantageous further development of the invention provides that a keyboard based on a snap disk and/or on short-stroke keys and/or 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 self-luminous touch-sensitive display

Fig. 2: Installation of a self-illuminating touch-sensitive display in a front panel

Fig. 3: Section through a self-illuminating touch-sensitive display with larger front foil

Figure 1 shows a cross-section through the OLED display. A thin organic layer sequence consisting of hole-transporting material 4, emitting material 5, and electron-transporting material 6 is embedded on the back of a glass substrate 1 between two metallizations, a transparent anode made of transparent conductive indium tin oxide (ITO) 2 and a metal cathode 3. A transparent conductive indium tin oxide (ITO) 2 and a polyester film 3 with a transparent conductive indium tin oxide coating (ITO) 2 on the back are also applied to the front of the glass substrate 1, with the film being separated from the glass substrate 1 by spacers 7.

Figure 2 shows the installation of a self-illuminating touch-sensitive display 8 in a front panel 9 with a frame. This installation variant offers a high level of stability, with the display 8 resting on and being attached to a stepped milling 10.

Figure 3 shows a section through a self-illuminating touch-sensitive display with a larger front foil 11. The front foil 11, which is designed as a continuous foil of the resistive touchscreen, is larger than the input and output option 12 and has a rear print 13 in the area outside the input and output option. The front foil with the rear input and output option is mounted on a front panel 14, whereby the front panel has a recess 15 for the output option.

Claims (10)

1. Self-luminous touch-sensitive display designed as an input and output option in computer systems and/or computer-like systems and/or electronic devices and/or controls, characterized in that an output unit in the form of a self-luminous display is applied to the back of a substrate carrier plate, preferably a glass plate, and a touch-sensitive input option is arranged on the front. 2. Self-luminous touch-sensitive 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. Self-luminous touch-sensitive display according to one of the preceding claims, characterized in that a resistive touchscreen is used as the touch-sensitive input option. 4. Self-luminous touch-sensitive display according to one of the preceding claims, characterized in that the substrate carrier plate is at the same time the carrier plate for the input and output option. 5. Self-luminous touch-sensitive display according to one of the preceding claims, characterized in that a safety glass pane is used as the substrate carrier plate. 6. Self-luminous touch-sensitive 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. 7. Self-luminous touch-sensitive display according to one of the preceding claims, characterized in that the front film has a rear printing in the area outside the display device. 8. Self-luminous touch-sensitive 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. 9. Self-luminous touch-sensitive display according to one of the preceding claims, characterized in that the resistive touchscreen on the glass substrate also has a transparent conductive indium tin oxide (ITO) and a polyester film with a rear-side transparent conductive indium tin oxide coating (ITO), wherein the film is separated from the glass substrate by spacers and/or dots. 10. Self-luminous touch-sensitive display according to one of the preceding claims, characterized in that the self-luminous touch-sensitive display front film is integrated in a front panel.