CN217485033U

CN217485033U - Display device, human-computer interaction system and household appliance

Info

Publication number: CN217485033U
Application number: CN202221382470.5U
Authority: CN
Inventors: 李忠科; 樊书海; 石林
Original assignee: Diehl Abuck Fund Co ltd
Current assignee: Diehl Abuck Fund Co ltd
Priority date: 2022-05-27
Filing date: 2022-05-27
Publication date: 2022-09-23
Anticipated expiration: 2032-05-27
Also published as: DE202023102682U1

Abstract

The utility model relates to a display device, it includes: a first display unit; a second display unit; a first prism constituted as an isosceles right triangular prism; a second prism constituted as a right parallelepiped prism, an isosceles trapezoid prism or an isosceles right triangular prism; and two layers with transmission and reflection functions, wherein the first prism and the second prism are spliced into a straight quadrangular prism with a right trapezoid bottom surface, a first layer with transmission and reflection functions is arranged between the first prism and the second prism, a second layer with transmission and reflection functions is arranged on the inclined plane of the straight quadrangular prism with the right trapezoid bottom surface, and the first display unit and the second display unit are perpendicular to each other and adjacently arranged on the first prism and the second prism respectively, so that light emitted by the first display unit and light emitted by the second display unit are in the same direction after being reflected by the second layer with transmission and reflection functions. The utility model discloses still relate to a human-computer interaction system and a domestic appliance.

Description

Display device, human-computer interaction system and household appliance

Technical Field

The utility model relates to a display device, a human-computer interaction system and domestic appliance.

Background

At present, industrial products, in particular household appliances, generally have a rich functionality and status. Manufacturers are increasingly pursuing a stylish appearance, particularly a substantially transparent appearance, in display devices for displaying such functions and states to a user. For this reason, there have been some attempts in the prior art. For example, translucent OLED displays are used, which however today still has to be expensive; or using a display scheme projected onto glass or a translucent film, but this has more limitations both for the application scenario and the installation setup; as well as holographic projection technology, which has not yet maturely been applied in industrial products, in particular in household appliances.

Therefore, there is a high necessity for a display device capable of presenting display contents by means of a substantially transparent medium and displaying as much display contents as possible in a limited size at a low manufacturing cost.

SUMMERY OF THE UTILITY MODEL

The object of the present invention is to provide a display device, a human-computer interaction system and a household appliance which are able to present display contents by means of a substantially transparent medium and which display as many display contents as possible in a limited size with low production costs.

The task is through one according to the utility model discloses a display device, one according to the utility model discloses a man-machine interaction system and one according to the utility model discloses a domestic appliance solves.

A first aspect of the present invention relates to a display device, the display device including: a first display unit; a second display unit; a first prism configured as an isosceles right triangular prism; a second prism constituted as a right parallelepiped prism, an isosceles trapezoid prism or an isosceles right triangular prism; and two layers with transmission and reflection functions, wherein the first prism and the second prism are spliced into a straight quadrangular prism with a right trapezoid bottom surface, a first layer with transmission and reflection functions is arranged between the first prism and the second prism, a second layer with transmission and reflection functions is arranged on the inclined plane of the straight quadrangular prism with the right trapezoid bottom surface, the first display unit and the second display unit are mutually vertical and adjacently arranged on the first prism and the second prism respectively, so that light emitted by the first display unit and light emitted by the second display unit are in the same direction after being reflected by the second layer with transmission and reflection functions.

In the context of the present invention, a prism is understood to be a polyhedron made of transparent material. A first prism designed as an isosceles right triangular prism is understood to mean a transparent right triangular prism having an isosceles right triangular base, i.e. a right triangular prism whose base is a right triangle having two angles of 45 °. As second prism, a straight parallelepiped prism is understood to be a transparent straight quadrangular prism with a parallelogram base; an isosceles trapezoid prism is understood to be a transparent straight quadrangular prism with an isosceles trapezoid base; the second prism formed as an isosceles right triangular prism is also understood to be a transparent right triangular prism having an isosceles right triangular base, i.e. a right triangular prism having a base surface with two angles of 45 °.

According to the utility model discloses the regulation, first prism constitutes for straight parallelepiped prism, isosceles trapezoid prism or isosceles right angle prism's second prism amalgamation into a bottom surface for right trapezoid's straight quadrangular prism with the constitution. This means that in the base surfaces of the first and second prisms, the hypotenuse of the isosceles right triangle should coincide with one side of the parallelogram, with one waist of the isosceles trapezoid or with one leg of the other isosceles right triangle, and one leg of the isosceles right triangle is collinear with the other leg of the parallelogram, isosceles trapezoid to form a right trapezoid as a whole. This clearly requires that the acute angles of the parallelograms or the base angles of the isosceles trapezoids be 45 ° and that one of the base angles of the right-angled trapezoids formed should also be 45 °. Here, a plane on which the oblique waist of the rectangular trapezoid is located is referred to as an inclined plane of a right quadrangular prism having a rectangular trapezoid bottom surface.

The first layer with the transmission and reflection functions is arranged between the first prism and the second prism, and the second layer with the transmission and reflection functions is arranged on the inclined surface of the straight quadrangular prism with the right trapezoid bottom surface. In this case, the two layers having both transmissive and reflective action are to be understood as meaning layers which are capable of light transmission and of light reflection. It should be noted that the two layers with transmission and reflection functions may be both layers for achieving light transmission and light reflection, that is, incident light is partially transmitted by the layers with transmission and reflection functions and partially reflected by the layers, and an example of this may be a transflective layer. Without being limited thereto, the layer having both transmissive and reflective functions may also be a layer that achieves light transmission and/or light reflection in its different states, respectively, and an example of this may be an electrochromic film that is capable of achieving total reflection, total transmission or partial transmission and partial reflection in the case of application of different voltages, respectively. Thus, the first prism, the second prism and the two layers with both transmission and reflection can be considered together as one optical component.

The utility model discloses the regulation, first display element with second display element mutually perpendicular and set up respectively on first prism and second prism with adjoining, make by the light that first display element sent and by the light that the second display element sent is syntropy after the second layer reflection through having transmission and reflex action concurrently. For this, one of the first display unit and the second display unit should be disposed on the right-angled surface of the first prism with respect to the inclined surface of the straight quadrangular prism having the right-angled trapezoid as the bottom surface, and the other of the first display unit and the second display unit should be disposed on the inclined surface of the first prism. Thus, light emitted by the one of the first display unit and the second display unit can be transmitted through the first layer having both transmissive and reflective functions and can be emitted at the second layer having both transmissive and reflective functions, and the other of the first display unit and the second display unit can be emitted at the first layer having both transmissive and reflective functions and at the second layer having both transmissive and reflective functions, respectively. Therefore, the light emitted by the first display unit and the light emitted by the second display unit can be reflected out of the second prism at the second layer with the functions of transmission and reflection, so that when a user observes the inclined plane area where the second layer with the functions of transmission and reflection is located against the reflection direction, the display content of the first display unit and/or the second display unit can be observed on a basically transparent medium. It is particularly mentioned that when the user looks at the bevel area against the reflection direction there, only a part of the transparent second prism can be seen together with the transmissive and reflective second layer on the bevel, the display will be present in a substantially transparent medium, and the user can see at least partly the scenery behind it through the bevel area, whereby an approximately see-through effect can occur. Particularly, the inclined plane area also presents a crystal clear display effect which can be similar to the holographic projection visual effect under the holographic projection glass or the visual effect of laser glass inner carving, thereby providing excellent visual impression and visual experience for users and giving product impression of intellectualization and technological sense.

Furthermore, with the present invention, in the case where the two layers having both the transmissive and reflective functions are appropriately used, when only the first display unit is lit, the user can observe the display content of the first display unit against the final reflection direction of light; when only the second display unit is lighted, a user can observe the display contents of the second display unit against the final reflection direction of the light; while when the first display unit and the second display unit are simultaneously lit, the user can also simultaneously observe the display content of the first display unit and the second display unit against the final reflection direction at the second layer having both transmission and reflection functions. Based on such a mode, the utility model discloses with lower manufacturing cost realize showing more technical effect of content on limited size, and then can also balance the contradiction between the diversified and display interface succinctness of content that shows.

It should also be noted that in the present invention, the first prism and the second prism are used as a transmission medium for light in the display device and a support device or an application device for the two layers with both transmission and reflection functions, so as to reduce the refraction loss of light between different media, especially between the air-solid interface or the solid-air interface, and to enable the two layers with both transmission and reflection functions to be flatly and fixedly placed in the display device, while enhancing the stability and strength of the display device against mechanical stress and vibration. In addition, the first prism and the second prism can prevent the display device from entering the gray water.

According to an embodiment of the present invention, the first display unit and the second display unit respectively include one or more of an icon display, a nixie tube display, or a dot matrix display screen that can be lighted. According to the utility model, the first display unit and the second display unit can be respectively composed as an icon display, a nixie tube display or a dot matrix display screen which can be lighted; and the first display unit and the second display unit may be a combination of the above displays, respectively. For example, a illuminable icon display and a digital tube display may be integrated into one display unit, or an illuminable icon display and a dot matrix display may be integrated into one display unit, or a digital tube display and a dot matrix display may be integrated into one display unit. It is also possible to integrate the illuminable icon display, the nixie tube display and the dot matrix display in one display unit. A dot matrix display screen is understood to mean a screen composed of regularly arranged pixels, which is capable of displaying dynamic and/or graphical display contents. In the present invention, the two display units can be realized in a variety of ways, in particular the display effect, in particular the dynamic and/or graphical display effect, can be enriched by different kinds of displays, in particular their combination.

According to an embodiment of the present invention, the illuminable icon display comprises a circuit board integrated with LED elements, a display film with display icons and a support between the circuit board and the display film. Here, one or both of the first display unit and the second display unit can be realized in a simple and low-cost manner by illuminating display icons on the display film with LED elements, which illuminated display icons pass through the display device to be viewable by a user against the direction of ultimate reflection, thereby knowing the relevant function or state or the like. The display icon may be configured as a transparent area or a hollow-out area corresponding to the display content. Preferably, the display icon is printed on the display film by screen printing or inkjet printing. Here, the transparent region refers to a region configured to transmit light on the substrate of the display film, the transparent region may be configured to have color, and the hollow region is a region hollowed out in the substrate of the display layer. The transparent or hollowed-out regions may transmit light emitted by the LED elements and present icons, which may include, for example, letters, numbers, patterns, symbols, and the like, conforming to the display content. Further, in order to sufficiently diffuse light emitted from the point light sources of the LED elements into surface light to achieve uniform light efficiency, it is conceivable to integrate a light diffusion layer into a display film or print a light diffusion ink onto the display film. However, it is also possible to use a separate light diffusion film, which can be combined in a stack with the display film, in particular to connect, e.g. glue, the light diffusion film to the display film.

According to an embodiment of the invention, the support comprises a plurality of cavities, in each of which at least one of the LED elements is accommodated for illuminating a display icon on the display film arranged corresponding to this cavity. In this embodiment, a plurality of LED elements may be arranged spaced apart on one circuit board, the LED elements being correspondingly separated into groups by the support and its plurality of cavities, each group of LED elements may comprise one or more LED elements. One display icon may be provided on the display film corresponding to each cavity. In this way, when a group of LED elements is lit, the display icon above the cavity can be illuminated correspondingly through the through-going cavity in the carrier. Advantageously, in case a group of LED elements comprises a plurality of LED elements, only one or a few of the LED elements may be lit accordingly. For example, in the case where four LED elements are accommodated in one cavity, one, two, three, or four LED elements may be lit, respectively, thereby enabling information to be conveyed to a user at the brightness of the lit icon. It is also possible to illuminate the individual LED elements of a group of LED elements in a sequence, for example a row of LED elements in a running light, a plurality of LED elements in a running light cycle or a plurality of LED elements in a breathing light. It is also possible that the plurality of LED elements have different colors, respectively, and are lit up individually or in combination as needed.

According to the utility model discloses an embodiment, the charactron shows the ware is section-type LED charactron, and/or the dot matrix display screen is TFT display screen, OLED display screen or dot matrix LED display screen. This makes it possible to provide a user with more abundant dynamic information, particularly, graphical display content, than the icon display described above.

According to the utility model discloses an embodiment, the bottom surface is the area that the inclined plane reflection of the straight quadrangular prism of right trapezoid was to this straight quadrangular's adjacent surface and is used as the display surface. Here, the inclined surface may be reflected to a portion of a surface on which a lower base of the right trapezoid on the bottom surface of the right quadrangular prism is located. And this part will serve as the display surface of the display device. Therefore, in order to better present the substantially transparent appearance of the display device according to the present invention, it is preferable to house the first display unit and the second display unit in a housing, in particular a housing of a household appliance using the display device of the present invention. That is, only the substantially transparent slope region and the display surface may be exposed outside the housing while hiding a portion of the display device that is not transparent due to the first display unit and the second display unit.

According to the utility model discloses an embodiment be provided with the third prism that constitutes for isosceles right angle prism additionally on the inclined plane of the straight quadrangular prism of bottom surface for right trapezoid for a cuboid is amalgamated into jointly to first prism, second prism and third prism. In this way, a square appearance is given to the entire display device and sharp vulnerable weak edges are avoided.

According to an embodiment of the present invention, the first layer having both transmission and reflection functions and the second layer having both transmission and reflection functions are a semitransparent and semi-reflective layer or an electrochromic film, respectively. In a cost-effective approach, the light is partially transmitted and partially reflected using a transflective layer. Furthermore, it is also conceivable to use electrochromic films which can be adjusted by applying a voltage. The electrochromic film is made of electrochromic materials, and can be selected from tungsten trioxide, polythiophene and derivatives thereof, viologen, tetrathiafulvalene and other electrochromic materials, and can show different transmittances under the control of voltages on two sides of the electrochromic film, so that the intensity of reflected light of the electrochromic film can be adjusted. The electrochromic film can realize, for example, total reflection and total transmission without and with application of a voltage, respectively, and the ratio of the fractions of transmission and reflection can be adjusted by adjusting the applied voltage. In particular, it is possible to reduce light loss and improve display luminance when total reflection and total transmission are achieved.

According to the utility model discloses an embodiment, semi-transparent semi-reflecting layer is semi-transparent semi-reflecting film, semi-transparent semi-reflecting layer or semi-transparent semi-reflecting layer. The transflective film may be bonded to the inclined surface of any one of the prisms. It is also possible that the transflective film is configured with adhesive capability on both sides, thereby simplifying the splicing of the first and second prisms and ensuring that they do not come loose during operation of the display device. Here, it is also preferable to consider applying the transflective layer as a plating or coating on the inclined surface of the prism, whereby the difficulty of assembly can be reduced.

According to an embodiment of the present invention, the transflective layer may have a transmittance of between 35% and 65%, preferably a transmittance of between 40% and 60%, particularly preferably a transmittance of 50%. Accordingly, in the case of neglecting absorption loss, the above transmittance means that the reflectance of the transflective layer may be 35% to 65%, preferably between 40% to 60%, particularly preferably 50%. The splitting ratio of the semi-transparent and semi-reflective layer is also 7: 13 to 13: 7, preferably 2: 3 to 3: 2, particularly preferably 1: 1.

according to an embodiment of the present invention, the first display unit and the second display unit are formed as an integral unit. In this case, for example, a prefabricated housing can be used, in which the first display unit and the second display unit are each mounted in a recess in the housing, so that the first display unit and the second display unit are mounted in a stable manner perpendicular to one another.

According to an embodiment of the present invention, the first prism and the second prism are made of inorganic glass, transparent plastic, transparent ceramic, natural crystal or synthetic crystal, respectively. Here, the inorganic glass refers to an amorphous solid having a silicate-based nonmetallic material as a main material. Transparent plastics refer to plastics having a high ability to transmit visible light, and include, for example: organic glass (i.e., polymethylmethacrylate, PMMA, commonly known as acryl), Polycarbonate (PC), Polystyrene (PS), transparent acrylonitrile-butadiene-styrene copolymer (ABS), styrene-methyl methacrylate copolymer (MS), poly-4-methyl-1-pentene, transparent polyvinyl chloride (PVC), polysulfone, polyterephthalate, transparent epoxy, and the like. The transparent ceramic may include transparent magnesium oxide ceramic, transparent aluminum oxide ceramic, transparent beryllium oxide ceramic, and the like. It is also possible to select the refractive indices of the first prism, the second prism and, if appropriate, the third prism as desired.

According to an embodiment of the present invention, at the same time, one or both of the first display unit and the second display unit display. In this way, display contents can be variously presented to a user by lighting the first display unit and/or the second display unit individually or in combination, thereby effectively satisfying display requirements of industrial products, particularly household appliances.

A second aspect of the utility model relates to a human-computer interaction system, human-computer interaction system includes according to the utility model discloses a display device and be used for detecting user operation's at least one infrared operating unit, at least one infrared operating unit sets up in display device's first display element and/or second display element. Through according to the utility model discloses a human-computer interaction system, in addition according to the utility model discloses a each item technical advantage that display device brought can detect user's operation based on the infrared reflection principle advantageously. In this case, the infrared operating unit can be integrated into one or both of the first display unit and the second display unit, and the infrared radiation emitted by the infrared operating unit can be emitted towards the display surface via the same optical path as the radiation emitted by the respective display unit, while the reflected infrared radiation, when reflected by the user, in particular his hand, is returned in the display unit back to the infrared operating unit on the basis of a reversible optical path in the display device. Therefore, the man-machine interaction system can detect the operation of the user. The wavelength of the infrared radiation can be in the range 770nm to 1mm, in particular 820nm to 950nm, preferably 850nm or 940 nm. For this purpose, the display device, in particular the first prism and the second prism thereof, should be designed to be transparent to infrared radiation, while the two layers that are both transmissive and reflective should likewise be transparent to infrared radiation and reflective.

For example, if the display unit is designed to comprise a circuit board with integrated LED elements, a display film with display icons, and a carrier between the circuit board and the display film, the display film should be designed to be hollow or infrared-transmitting in the region of the infrared operating unit.

Through according to the utility model discloses a man-machine interaction system, the user can also conveniently be operated, especially carry out corresponding operation to its demonstration content on the surface at man-machine interaction system or its display device of saying so directly outside having obtained remarkable vision impression and vision experience for the user obtains audio-visual and convenient interaction, and the optimal use is experienced. And simultaneously, according to the utility model discloses a human-computer interaction system can avoid setting up button or button with spending again around display device's surface, improves the integrated level of system, makes human-computer interaction system have succinct outward appearance.

Furthermore, according to the utility model discloses an among the human-computer interaction system, under first display element and the second display element all were provided with the condition of infrared operating unit, can make two infrared operating units move simultaneously through rational arrangement each other do not influence. For example, the infrared rays emitted from the infrared operation unit and the returned infrared rays in the first display unit and the second display unit may be optically separated from each other so as not to interfere with each other.

According to an embodiment of the present invention, the at least one infrared operating unit is a gesture operating unit and/or a touch operating unit. Here, the infrared operation unit may be configured in various ways. For example, only a gesture operation unit or only a touch operation unit may be provided in the human-computer interaction system, or both the gesture operation unit and the touch operation unit may be provided, or an infrared operation unit having both gesture operation and touch operation functions may be provided. Here, the user can perform a touch operation by contactingly touching a certain position on the display surface of the display device; and/or the user may gesture contactlessly by being in front of the display surface of the display device. The gestures may include, for example, sliding, swiping, hovering, slapping, lifting, and the like. In this case, the human-computer interaction system can be kept clean and hygienic and pollution-free by using contactless gestures.

According to the utility model discloses an embodiment, every infrared operating unit includes two at least infrared transmitting tubes, at least one infrared receiving tube, control circuit and signal processor, control circuit turns on and cuts off in turn infrared transmitting tube and/or infrared receiving tube, and signal processor receives and handles by the signal that infrared receiving tube produced. Here, for example, the technical contents disclosed in patent documents CN111487878A and CN113495615A disclosed by the present applicant can be referred to for an example of the infrared operation unit.

According to the utility model discloses an embodiment, a plurality of infrared transmitting tubes and a plurality of infrared receiving tube set up along the extending direction of the display element at infrared operating unit place in turn.

In particular, in the simplest variant of embodiment, the infrared control unit can comprise two infrared emission tubes, one infrared reception tube, a control circuit and a signal processor, wherein the two infrared emission tubes and the infrared reception tube are arranged alternately at a distance from one another in the direction of extent of the display unit in which the infrared control unit is located. Here, the respective infrared elements may be arranged in the direction of the long side of the display device in the order of one infrared emission tube, one infrared reception tube, and one infrared emission tube. In this case, the two infrared transmitting tubes are switched on in turn by the control circuit during operation and emit infrared radiation which can be reflected when the user's hand approaches and returns to the infrared receiving tube located in the middle. The infrared emitting tube may be an infrared light emitting diode, and the infrared receiving tube may be configured as an infrared photodiode or an infrared phototransistor. The signal processor can process and analyze signals generated when the infrared receiving tube receives the reflected infrared rays, so as to detect gestures and/or touches of a user. The signal processor may comprise a signal conditioning circuit of the infrared receiving tube and a micro-processing unit for analyzing the signal. For example, it may be detected by analyzing the timing and signal amplitude of the reflected infrared rays that the user's hand first appears over one infrared-emitting tube and then immediately over another infrared-emitting tube, whereby it can be determined that the user's hand slips or waves from over one infrared-emitting tube to over another.

In yet another more complex embodiment, the infrared operating unit includes a plurality of infrared emitting tubes, a plurality of infrared receiving tubes, a control circuit, and a signal processor, the plurality of infrared emitting tubes and the plurality of infrared receiving tubes being alternately arranged in an extending direction of the display unit in which the infrared operating unit is located in a spaced relationship with each other, the control circuit being operable to control the respective infrared emitting tubes and the respective infrared receiving tubes to be turned on and off, the signal processor being operable to receive and process signals generated by the plurality of infrared receiving tubes and to determine a coordinate position of a hand of a user in the extending direction above the infrared operating unit. In particular, the control circuit controls the on and off of each infrared transmitting tube and each infrared receiving tube in a time division multiplexing manner. For example, the control circuit may simultaneously turn on all the infrared receiving tubes, and turn on each infrared transmitting tube in turn; or one or more infrared transceiving groups are sequentially connected, and each infrared transceiving group comprises at least one adjacent infrared transmitting tube and at least one adjacent infrared receiving tube; or a plurality of nonadjacent infrared transmitting and receiving groups are switched on in a staggered way in time, and each infrared transmitting and receiving group comprises at least one infrared transmitting tube and at least one infrared receiving tube which are adjacent.

In particular, in this embodiment, whether the infrared operation unit functions as the gesture operation unit or the touch operation unit can be manipulated by setting or adjusting the light emission intensity of the infrared emission tube. Since the infrared ray needs to undergo refraction loss on the solid-air interface twice when detecting the gesture operation, the infrared transmitting tube is required to provide a larger luminous intensity to enable the infrared receiving tube to receive the returned infrared ray, and a larger driving current should be provided for the infrared transmitting tube at this time. In contrast to this, if the infrared operation unit detects only a touch operation, only a smaller light emission intensity and thus a smaller drive current are necessary. It is also advantageous to drive the infrared emitting tube at different currents at different times. It is particularly advantageous to detect both touch and gesture operations in a time-multiplexed manner with the same infrared control unit.

It should be noted that the at least two infrared emission tubes and the at least one infrared reception tube do not necessarily have to be arranged parallel to one side of the display unit, nor do they necessarily have to be arranged along a straight line, nor do they necessarily have to be arranged alternately. The infrared transmitting tubes and the infrared receiving tubes are preferably alternately arranged in such an order of one infrared transmitting tube and one infrared receiving tube. This means that the infrared transmitting tubes and the infrared receiving tubes may be located on a straight line parallel to the long sides of the display unit, may be located on a straight line along the diagonal of the display unit, or may also be located on a broken line. These infrared transmitting tubes and infrared receiving tubes can be flexibly arranged according to the specific structure of the display unit. Preferably, the spacing between the infrared transmitting tubes and the infrared receiving tubes is between 5mm and 50 mm.

According to the utility model discloses an embodiment, the human-computer interaction system comes output control command and/or changes display device's demonstration according to the operation that is detected by infrared operating unit. Here, the human-computer interaction system may display functions and states related to the industrial product, particularly the home appliance, to a user as an input-output device of the industrial product, particularly the home appliance, and provide a control instruction from the user to the industrial product, particularly the home appliance, according to an operation detected by the infrared operation unit, such as a gesture operation or a touch operation. Further, the display of the display device can also be changed by an operation detected according to the infrared operation unit, for example, switching whether the first display unit performs display or the second display unit performs display by a waving gesture.

The third aspect of the utility model relates to a household appliance, household appliance includes according to the utility model discloses a display device or according to the utility model discloses a human-computer interaction system, wherein, display device first display element and second display element hold inside household appliance's the casing. In this way, only the substantially transparent part of the display device which protrudes outside the housing of the household appliance is visible to the user on the outside of the household appliance, and the display is present in a substantially transparent medium, and the user can see at least partially the scenery behind it through the bevel area, whereby an approximately see-through effect can occur. From the perspective of the user, the display unit appears to be attached to the surface of the home appliance, so that the appearance of the home appliance is novel and unique, and an impression of a product is given to the user, which brings intellectualization and a sense of science and technology.

According to the utility model discloses an implementation mode, domestic appliance is air conditioner, lampblack absorber, kitchen range, refrigerator, oven, dish washer, food processor, washing machine, dryer, stereo set, TV, intelligent tap or intelligent closestool.

Other features of the invention will be apparent from the accompanying drawings and from the detailed description. All the features and feature combinations mentioned above in the description and also features and feature combinations mentioned below in the description and/or shown in the figures individually can be used not only in the respectively given combination but also in other combinations or in isolation.

Drawings

Fig. 1 shows a cross-sectional view of a first embodiment of a display device according to the invention;

fig. 2 shows a cross-sectional view of a second embodiment of a display device according to the invention;

fig. 3 shows a cross-sectional view of a third embodiment of a display device according to the invention;

fig. 4 shows an exploded view of a first embodiment of a display device according to the present invention;

fig. 5 shows a cross-sectional view of a fourth embodiment of a display device according to the invention;

fig. 6 shows an exploded view of a first embodiment of a display device according to the invention;

fig. 7 shows an exploded view of a second embodiment of a display device according to the invention;

fig. 8 shows a schematic view of a first embodiment of a human-computer interaction system according to the invention;

fig. 9 shows an exploded view of a first embodiment of a human-computer interaction system according to the invention;

fig. 10 shows a layout of an infrared operation unit on a display unit in a human-computer interaction system according to the present invention;

fig. 11 shows a layout of an infrared operation unit on a display unit in a human-computer interaction system according to the present invention;

fig. 12 shows a layout of an infrared operation unit on a display unit in a human-computer interaction system according to the present invention;

fig. 13 shows a layout of an infrared operation unit on a display unit in a human-computer interaction system according to the present invention;

fig. 14 shows a layout of an infrared operation unit on a display unit in a human-computer interaction system according to the present invention;

figure 15 shows an exploded view of a second embodiment of a human-computer interaction system according to the invention;

figure 16 shows a cross-sectional view of a second embodiment of a human-computer interaction system, in accordance with the present invention;

fig. 17 shows a household appliance mounted with a display device or a human-computer interaction system according to the present invention.

Detailed Description

In the various exemplary embodiments described, identical elements are provided with the same reference symbols or the same element names, wherein the disclosure contained throughout the description can be transferred in a meaningful manner to elements provided with the same reference symbols or the same element names. Furthermore, in various embodiments, the number, implementation and/or arrangement of elements is not limited to the illustrated examples, but other numbers, implementations and/or arrangements can be selected according to actual needs.

Fig. 1 shows a cross-sectional view of a first embodiment of a display device according to the invention. The display device shown in fig. 1 includes: a first display unit 1; a second display unit 2; a first prism 3 configured as an isosceles right triangular prism; a second prism 4 configured as a straight parallelepiped prism; and two layers with transmission and reflection functions, wherein the first prism 3 and the second prism 4 are spliced into a straight quadrangular prism with a right trapezoid bottom surface, a first layer 5 with transmission and reflection functions is arranged between the first prism 3 and the second prism 4, a second layer 6 with transmission and reflection functions is arranged on the inclined plane of the straight quadrangular prism with the right trapezoid bottom surface, the first display unit 1 and the second display unit 2 are perpendicular to each other and adjacently arranged on the first prism 3 and the second prism 4 respectively, so that light emitted by the first display unit 3 and light emitted by the second display unit 2 are reflected by the second layer 6 with transmission and reflection functions and then are in the same direction.

In the embodiment shown in fig. 1, the first prism 3 and the second prism 4, which is a right parallelepiped prism, are combined to form a right rectangular prism having a right-angled trapezoidal bottom surface. In the cross section shown in fig. 1, i.e., in the bottom surfaces of the first prism 3 and the second prism 4, the hypotenuse of the isosceles right triangle should coincide with one side of the parallelogram, and one leg of the isosceles right triangle is collinear with the other leg of the parallelogram to form a right trapezoid as a whole. This naturally requires that the acute angle of the parallelogram also be 45 °, while a base angle of the right-angled trapezium formed should accordingly also be 45 °. Here, a plane on which the oblique waist of the rectangular trapezoid is located is referred to as an inclined plane of a right quadrangular prism having a rectangular trapezoid bottom surface.

A first layer 5 having both transmission and reflection functions is provided between the first prism 3 and the second prism 4, and a second layer 6 having both transmission and reflection functions is provided on the inclined surface of the straight quadrangular prism having a right trapezoid bottom surface. In this case, the two layers having both a transmissive and a reflective effect are to be understood as meaning layers which are capable of light transmission and of light reflection. It should be noted that the layer having both transmission and reflection functions may be a layer that achieves both transmission and reflection of light, that is, incident light is partially transmitted by the layer having both transmission and reflection functions and partially reflected by the layer, and an example of this may be a transflective layer. Without being limited thereto, the layer having both transmission and reflection effects may also be a layer that achieves light transmission and/or light reflection effects in its different states, respectively, and an example of this may be an electrochromic film.

As shown in fig. 1, the first display unit 1 and the second display unit 2 are disposed on the first prism 3 and the second prism 4, respectively, perpendicularly and adjacently to each other, so that light emitted from the first display unit 1 and light emitted from the second display unit 2 are in the same direction after being reflected by the second layer 6 having both transmission and reflection functions. In fig. 1, the main light path of the first display unit 1 is schematically depicted by a dashed line, and the main light path of the second display unit 2 is schematically depicted by a dashed-dotted line. The light emitted from the first display unit 1 is transmitted through the first layer 5 having both transmission and reflection functions, reaches the second layer 6 having both transmission and reflection functions on the inclined surface of the right-angled trapezoidal rectangular prism, is reflected thereon, and is finally emitted upward in fig. 1. The light emitted from the second display unit 2 is first reflected by the first layer 5 with both transmission and reflection functions, then reaches the second layer 6 with both transmission and reflection functions on the inclined surface of the right quadrangular prism with a right trapezoid bottom surface, and is reflected again, and finally is emitted to the upper side of fig. 1. In this way, the light emitted by the first display unit 1 and the light emitted by the second display unit 2 can be reflected out of the second prism 4 at the second layer 6 with both transmissive and reflective properties, so that a user can observe the display content of the first display unit 1 and/or the second display unit 2 on a substantially transparent medium when viewing the inclined surface region at which the second layer 6 with both transmissive and reflective properties is located against the reflection direction there, i.e. in the direction of the hollow arrow in fig. 1. The bevel region 8 is here marked in fig. 1 by way of example with a dotted box. When the user looks at the bevel area 8 in the direction of the hollow arrow in fig. 1, only a part of the transparent second prism 4 is seen together with the transmissive and reflective second layer on the bevel. In the ramp area 8 the display will be presented in a substantially transparent medium and the user can see at least partly the scenery behind it through the ramp area 8, whereby an approximately see-through effect can occur.

Further, in the case where the two layers having both the transmissive and reflective functions are appropriately used, when only the first display unit 1 is lit, the user can observe the display contents of the first display unit 1 in the direction of the outlined arrow in the slope area 8; when only the second display unit 2 is lit, the user can observe the display contents of the second display unit 2 in the direction of the outlined arrow in the slope area 8; while the first display unit 1 and the second display unit 2 are simultaneously lighted, the user can also simultaneously observe the display contents of the first display unit 1 and the second display unit 2 in the direction of the outlined arrow in the slope area 8. Based on such a mode, the utility model discloses with lower manufacturing cost realized showing as much as possible the technological effect of demonstration content on limited size, and then can also balance the contradiction between demonstration content diversification and the display interface succinctness. And in particular, by not limiting the color of the light displayed by the display device according to the invention, visual design needs can be met.

Fig. 2 shows a cross-sectional view of a second embodiment of a display device according to the invention. The difference from the first embodiment shown in fig. 1 is that the second prism 4' is configured as an isosceles trapezoidal prism.

In the embodiment shown in fig. 2, the first prism 3 and the second prism 4' configured as an isosceles trapezoid prism are combined to form a straight quadrangular prism having a right-angled trapezoid bottom surface. In the cross section shown in fig. 2, i.e., in the bottom surfaces of the first prism 3 and the second prism 4', the hypotenuse of the isosceles right triangle should coincide with one waist of the isosceles trapezoid, and one leg of the isosceles right triangle is collinear with the upper base of the isosceles trapezoid to form a right trapezoid as a whole. This naturally requires that the base angles of the isosceles trapezoids are also both 45 °. Here, a plane on which the oblique waist of the rectangular trapezoid is located is also referred to as an inclined plane of the rectangular prism whose bottom surface is the rectangular trapezoid.

As shown in fig. 2, the first display unit 1 and the second display unit 2 are also disposed on the first prism 3 and the second prism 4' perpendicularly and adjacently to each other, respectively, so that the light emitted from the first display unit 1 and the light emitted from the second display unit 2 are in the same direction after being reflected by the second layer 6 having both transmission and reflection functions. The main light paths of the first display unit 1 and the second display unit 2 are schematically depicted in fig. 2 by dashed and dotted lines, respectively. The light emitted from the first display unit 1 is transmitted through the first layer 5 having both transmission and reflection functions, reaches the second layer 6 having both transmission and reflection functions on the inclined surface of the right-angled trapezoidal rectangular prism, is reflected thereon, and is finally emitted downward in fig. 2. The light emitted from the second display unit 2 is first reflected at the first layer 5 having both transmission and reflection functions, then reaches the second layer 6 having both transmission and reflection functions on the inclined surface of the right-angled trapezoidal straight quadrangular prism, and is reflected again, and finally, is emitted downward in fig. 2 as well. In this way, the light emitted by the first display unit 1 and the light emitted by the second display unit 2 can be reflected out of the second prism 4' at the second layer 6 with both transmissive and reflective properties, so that a user can observe the display content of the first display unit 1 and/or the second display unit 2 on a substantially transparent medium when viewing the slanted area at which the second layer 6 with both transmissive and reflective properties is located, against the direction of reflection there, i.e. in the direction of the hollow arrow in fig. 2. The bevel region 8 is marked with a dotted frame, similar to fig. 1. When the user looks at the bevel area 8 in the direction of the hollow arrow in fig. 1, only a part of the transparent second prism 4' is seen together with the transmissive and reflective second layer on the bevel. In the ramp area 8 the display will be presented in a substantially transparent medium and the user can see at least partly the scenery behind it through the ramp area 8, whereby an approximately see-through effect can occur.

In fig. 2, the display surface 9 of the display device is additionally shown as a box with diagonal dashes. The display surface 9 is a region where the inclined surface of a right-angled quadrangular prism with a right-angled trapezoid as a bottom surface is reflected to the adjacent surface of the right-angled quadrangular prism, that is, a surface formed by projecting the oblique waist of the right-angled trapezoid onto the bottom of the right-angled trapezoid in the bottom surface. The user will see the display content of the first display device 1 and/or the second display device 2 on this display surface 9 when looking at the bevel area in the direction of the outlined arrow. It is particularly noted that, in order to better present the substantially transparent appearance of the display device according to the invention, it is preferable to house the first display unit 1 and the second display unit 2 in a housing, in particular a housing of a household appliance using the display device of the invention. That is, only the substantially transparent bevel region 8 and the display surface 9 may be exposed outside the housing while hiding portions of the display device that are not transparent due to the first display unit 1 and the second display unit 2.

Fig. 3 shows a cross-sectional view of a third embodiment of a display device according to the invention. The difference from the first and second embodiments shown in fig. 1 and 2 is that the second prism 4 ″ is configured as an isosceles right triangular prism.

In the embodiment shown in fig. 3, the first prism 3 and the second prism 4 ″ configured as an isosceles right triangular prism are combined to form a straight quadrangular prism having a right trapezoid bottom surface. In the cross-section shown in fig. 3, i.e. in the base surfaces of the first prism 3 and the second prism 4 ", the hypotenuse of the isosceles right triangle of the first prism should coincide with one of the legs of the isosceles right triangle of the second prism to form a right trapezoid as a whole. Here, a plane on which the oblique waist of the rectangular trapezoid is located is also referred to as an inclined plane of the rectangular prism whose bottom surface is the rectangular trapezoid.

Fig. 4 shows an exploded view of a first embodiment of a display device according to the invention. Fig. 4 shows, separately from one another, a first display unit 1, a second display unit 2, a first prism 3 in the form of an isosceles right triangular prism, and a second prism 4 in the form of a right parallelepiped prism; a first layer 5 and a second layer 6 having both transmissive and reflective properties. The first prism 3 and the second prism 4 can be spliced into a straight quadrangular prism with a right-angled trapezoid bottom surface. A first layer 5 having both transmissive and reflective properties is arranged between the first prism 3 and the second prism 4. As shown in fig. 4, the first layer 5, which has both transmissive and reflective functions, is disposed between the inclined plane 33 of the first prism and the inclined plane 44 of the second prism. And a second layer 6 having both transmission and reflection functions is provided on the inclined surface 55 of the right quadrangular prism whose bottom surface is a right trapezoid.

For example, the first layer 5 having both transmission and reflection functions and the second layer 6 having both transmission and reflection functions may be a transflective layer or an electrochromic film. The semi-transparent and semi-reflective layer is preferably a semi-transparent and semi-reflective film, a semi-transparent and semi-reflective coating or a semi-transparent and semi-reflective coating. For example, the transflective film may be adhered to the inclined surfaces of either or both of the prisms. In particular, the transflective layer may have a transmittance of between 35% and 65%, preferably a transmittance of between 40% and 60%, particularly preferably a transmittance of 50%. Further, in the case of using the electrochromic film, the electrochromic film can realize, for example, total reflection, total transmission, and semi-transmission reactions, respectively, under application of different voltages. It is also advantageously possible to adjust the ratio of the fractions of transmission and reflection by adjusting the applied voltage. By using the electrochromic film, it is advantageously possible to reduce light loss and improve the luminance of display when the total reflection action and the total transmission action are achieved. By means of the adjustable ratio of the transmission and reflection fractions, display effects, in particular different luminous effects in the case of superimposed displays of two display units, can be represented in a versatile manner.

Here, the first prism 3 and the second prism 4 may be made of inorganic glass, transparent plastic, transparent ceramic, natural crystal, or synthetic crystal, respectively.

Not limited to this, it is also conceivable that the first display unit and the second display unit are configured as an integral body. In this case, for example, a prefabricated housing can be used, into which the first display unit and the second display unit are each inserted into a recess.

Fig. 5 shows a cross-sectional view of a fourth embodiment of a display device according to the invention. The difference from the first embodiment shown in fig. 1 is that a third prism 10 formed as an isosceles right triangular prism is additionally provided on the inclined surface of the straight quadrangular prism having a right trapezoid bottom surface, so that the first prism 3, the second prism 4, and the third prism 10 are collectively combined into a rectangular parallelepiped. In the cross section shown in fig. 5, that is, in the bottom surfaces of the first prism 3, the second prism 4, and the third prism 10, the hypotenuse of the isosceles right triangle of the third prism 10 should coincide with one side of the parallelogram, and one leg of the isosceles right triangle of the third prism 10 should be collinear with the other side of the parallelogram to constitute a rectangle as a whole. In this way, a square appearance is given to the entire display device and sharp vulnerable weak edges are avoided.

The third prism 10 can also be provided in the second and third embodiments according to fig. 2 and 3, without being limited to the one shown in fig. 5. Thus, in these embodiments, the first prism 3, the second prism 4, and the third prism 10 can be collectively combined into one rectangular parallelepiped.

Fig. 6 shows an exploded view of a first embodiment of a display device according to the present invention. A possible configuration of the first display unit 1 and the second display unit 2 is shown in detail in fig. 6. The first display unit 1 and the second display unit 2 are each configured as an illuminable icon display. The first display unit 1 and the second display unit 2 each comprise a circuit board 11 integrated with LED elements 14, a display film 13 with display icons 16, and a support 12 between the circuit board 11 and the display film 13. Thereby, the first display unit 1 and the second display unit 2 can be realized in a simple and low-cost manner, i.e. by illuminating the display icons 16 on the display film 13 with the LED elements 14. In the first display unit 1, the display icon 16 lit by the LED element 14 can be reflected off the upper side of the second prism 4 by the second layer 6 functioning as both transmission and reflection via the first prism 3, the first layer 5 functioning as both transmission and reflection, and the second prism 4. In the second display unit 2, the display icon 16 lit by the LED element 14 can be finally reflected out of the upper side of the second prism 4 by the second layer 6 functioning as both transmission and reflection via the second prism 4 and the first layer 5 functioning as both transmission and reflection.

In this case, the display icon 16 can be designed as a transparent or hollow area corresponding to the display content. The transparent or hollowed-out regions may transmit light emitted by the LED elements 14 and thus present icons that conform to the display, which may include, for example, words, numbers, patterns, symbols, and the like. Further, in order to sufficiently diffuse light emitted from the point light sources of the LED elements 14 into surface light to achieve uniform light efficiency, it is conceivable to integrate a light diffusion layer into the display film or print light diffusion ink onto the display film 13. However, it is also possible to use a separate light diffusion film, which can be combined in a stack with the display film, in particular to connect, e.g. glue, the light diffusion film to the display film.

The holder 12 shown in fig. 6 comprises a plurality of cavities 15, here four cavities 15, in each cavity 15 four LED elements 14 being accommodated for illuminating a display icon 16 arranged in correspondence with the cavity 15 on the display film 13. Here, a total of 16 LED elements 14 are arranged at intervals on one circuit board 11, and the LED elements 14 are respectively divided into four groups by the holder 12 and the cavities 15 thereof, each group of LED elements including four LED elements 14. One display icon 16 is provided on the display film 13 corresponding to each cavity 15. In this way, when a group of LED elements is lit, the display icon 16 above the cavity 15 can be illuminated through the through-going cavity 15 in the support 12.

Advantageously, when used for displaying with a display device, only one of the first display unit 1 and the second display unit 2 is used for displaying at the same time. That is, only one of the first display unit 1 and the second display unit 2 is turned on at the same time, while the other display unit remains turned off. As needed, the lit display unit may be turned off and another display unit may be lit at the next time. It is also possible to perform display simultaneously using the first display unit 1 and the second display unit 2. Here, it should be broadly understood that the simultaneous display described herein, for example, all of the displayed icons 16 of the first display unit 1 and the second display unit 2 are illuminated so that the icons superimposed on each other can be viewed. However, the simultaneous display may also be understood as lighting up part of the displayed icon 16 on the first display unit 1 and lighting up part of the displayed icon 16 on the second display unit 2, for example lighting up the first and third displayed icons on the first display unit 1 and lighting up the second and fourth displayed icons on the second display unit 2, so that displayed icons from different display units are presented on the display surface.

Furthermore, when using the display device shown in fig. 6 for displaying, it is conceivable for one cavity 15 in the display unit to correspondingly light only one or several LED elements 14 accommodated therein. In the case as shown in fig. 6, for example, one, two, three, or four LED elements may be lit, whereby the brightness of the first display unit 1 and/or the second display unit 2 may be adjusted to convey information to the user at the brightness of the lit icon. It is also possible to illuminate the individual LED elements of a group of LED elements separately in a sequence, for example in a running horse or in a breathing lamp. It is also possible that the LED elements 14 on the circuit board have different colors, respectively, and the LED elements 14 of the different colors are lit up, respectively, as required.

Fig. 7 shows an exploded view of a second embodiment of a display device according to the present invention. In fig. 7, the icon display made up of two sets of LED elements 14 on the circuit board 11 in the first display unit 1 includes a nixie tube display 17. Here, the nixie tube display is a three-position LED nixie tube capable of displaying different numbers between 000 and 999. For this purpose, a larger cavity 18 is cut into the support 12 and a digital display icon 19 in the shape 888 is correspondingly provided on the display membrane 13. Thus, the first display unit 1 can display three digits in addition to two icons to represent digital information such as power, temperature, operation time, remaining time, and the like. The second display unit 2 shown in fig. 7 is in the form of a dot matrix display. The dot matrix display screen can be a TFT display screen, an OLED display screen or a dot matrix LED display screen. Thus, the additional icon display can provide the user with richer dynamic information, particularly graphical display content.

In this second embodiment of the display device, the case of integrating only two types of displays in one display unit is exemplarily shown. Without being limited to this, the illuminable icon display and the dot matrix display screen can be integrated into one display unit according to the display requirements, or the digital tube display and the dot matrix display screen can be integrated into one display unit, or the illuminable icon display, the digital tube display and the dot matrix display screen can be realized in one display unit.

It is further noted that when displaying with the display device according to the present invention, it is advantageously possible to use one of the first display unit 1 and the second display unit 2 to display the power-on interface. The first display unit 1 integrated with LED elements shown in fig. 6 or fig. 7 is preferably used to display a power-on interface.

Fig. 8 shows a schematic diagram of a first embodiment of a human-computer interaction system according to the invention. Here, the human-computer interaction system includes not only the display device as shown above, the first embodiment of the display device as exemplarily shown in fig. 8, but also one infrared operation unit 20 for detecting a user operation, the infrared operation unit 20 being integrated in the first display unit 1 of the display device. Thus, in addition to the technical advantages brought by the display device according to the present invention, it is advantageously possible to detect the user's operation based on the infrared reflection principle. The infrared rays emitted by the infrared operation unit 20 can also be transmitted through the first prism 3 and the first layer 5 and the second prism 4 both for transmission and reflection via the same optical path as the light emitted by the first display unit 1 and reflected at the second layer 6 both for transmission and reflection toward the top in fig. 7. When the emitted infrared rays are reflected by the user, particularly his hand, the reflected infrared rays are returned to the infrared operation unit 20 based on a reversible optical path in the human-computer interaction system or the display apparatus, whereby the human-computer interaction system can detect the user's operation. Therefore, through the man-machine interaction system, a user can obtain excellent visual impression and visual experience provided by the display equipment, and can conveniently and directly operate on the surface of the man-machine interaction system or the display equipment and/or the upper part of the man-machine interaction system or the display equipment, so that the user can obtain intuitive and convenient interaction, and the use experience is optimized. Meanwhile, the man-machine interaction system can avoid setting keys or buttons around the surface of the display equipment in a consumption manner, so that the integration level of the system is improved, and the man-machine interaction system has a simple appearance.

The wavelength of the infrared light can be in the range 770 to 1mm, in particular 820 to 950nm, preferably 850nm or 940 nm. For this purpose, the display device, in particular the first prism 3 and the second prism 4 thereof, should be designed to be transparent to infrared radiation, while the two layers which are both transmissive and reflective should likewise be transparent to infrared radiation and reflective.

The infrared control unit 20 can be integrated in the first display unit 1 of the display device, i.e. it is formed as part of the first display unit 1. The infrared operating unit 20 is not shown to scale in fig. 8. In order to display in as large an area as possible, the infrared operation unit 20 may occupy only a small space on the first display unit 1, as shown in the subsequent figures.

It is possible for the human-computer interaction system to configure the infrared control unit 20 as a gesture control unit and/or as a touch control unit. This means that the infrared operation unit 20 is configured as only a gesture operation unit, only a touch operation unit, or one infrared operation unit having both gesture operation and touch operation functions. In addition, both the gesture operation unit and the touch operation unit can be arranged in the man-machine interaction system. The touch operation unit may detect a touch operation performed by a user by touching a certain position of the display surface 9 of the display device in a contact manner; and the gesture operation unit may detect a gesture made by the user in non-contact by being in front of the display surface 9 of the display device (upward as shown in fig. 8). The gestures may include, for example, swipes, hovers, taps, lifts, and the like.

Fig. 9 shows an exploded view of a first embodiment of a human-computer interaction system according to the invention. This figure shows a simple embodiment of the infrared operating unit. The infrared operation unit may be integrated in the first display unit 1 or the second display unit 2 of the display device as shown in fig. 6. Here, the first display unit 1 likewise comprises a circuit board 11 with integrated LED elements 14, a display membrane 13 with display icons 16 and a support 12 between the circuit board 11 and the display membrane 13. Here, the infrared operation unit provided in the first display unit 1 includes two infrared emission tubes 21, one infrared reception tube 22, and a control circuit and a signal processor, not shown, the infrared emission tubes 21 and the infrared reception tube 22 are alternately provided in the extending direction of the first display unit 1 where the infrared operation unit is located, the control circuit can alternately turn on and off the two infrared emission tubes 21 and/or the infrared reception tube 22, and the signal processor receives and processes a signal generated by the infrared reception tube 22. Here, for example, the technical contents disclosed in patent document CN111487878A disclosed by the present applicant can be referred to for an example of the infrared operation unit. As shown in fig. 9, the infrared operation unit is preferably mounted on the circuit board 11 of the first display unit 1 integrated with the LED element 14. One infrared transmission tube 21, one infrared reception tube 22, and one infrared transmission tube 21 are arranged in the illustrated order along the direction of the long side of the first display unit 1. For example, two infrared transmitting tubes 21 are alternately turned on by the control circuit and emit infrared rays when operating. In order to emit infrared rays at least to the display surface 9 of the display device, a cavity 23 for the infrared emission tube 21 or for the infrared reception tube 22 is also opened in the holder 12. As shown in fig. 9, the three cavities 23 are respectively hollow cylinders for accommodating one infrared element each. Particularly advantageously, a light limiting structure for the infrared emission tube 21 and for the infrared reception tube 22 may be formed in the holder 12, so that light leakage from the infrared emission tube 21 to the infrared reception tube 22 may be blocked by the light limiting structure and the emission and reception angles may be limited to reduce interference of ambient light. Preferably, the height of the light limiting structure may be equal to or beyond the top ends of the infrared transmitting tube 21 and the infrared receiving tube 22. Accordingly, the display film 13 should also form a cutout or infrared-transmitting region 24 in the region of the infrared control unit, in particular at a position corresponding to the infrared emission tube 21 and the infrared reception tube 22. The first prism 3 and the second prism 4 in the display device should also be designed to transmit infrared light, while the first layer 5, which is transmissive and reflective, and the second layer 6, which is transmissive and reflective, should likewise transmit and reflect infrared light. The infrared radiation emitted by the infrared operating unit can thus be reflected or transmitted at least onto the display surface 9 of the display unit, in particular can emerge from the display surface 9, and can thus be reflected when the user's hand approaches and be received along the opposite optical path by the infrared receiver tube 22 located in the middle. Here, the infrared transmitting tube 21 may be an infrared light emitting diode, and the infrared receiving tube 22 may be configured as an infrared photodiode or an infrared phototransistor. The signal processor can process and analyze signals generated when the infrared receiving tube receives the reflected infrared rays, so as to detect gestures and/or touches of a user. The signal processor may comprise, for example, a signal conditioning circuit of an infrared receiving tube and a micro-processing unit for analyzing the signal. For example, it can be detected by analyzing the timing and signal amplitude of the reflected infrared light that the user's hand first appears above the left infrared-emitting tube and then immediately above the right infrared-emitting tube, and it can be determined that the user's hand has slipped or waved from above the left infrared-emitting tube to above the right infrared-emitting tube. The infrared control module in fig. 9 is preferably used as a gesture control module, since it can only distinguish a limited number of positions of the user's hand relative to the four displayed icons 16 formed on the icon display.

Fig. 10 to 14 show five layouts of the infrared operation unit on the display unit in the man-machine interaction system according to the present invention. Here, the display unit may relate to both the first display unit 1 and the second display unit 2. Starting from the embodiment of the first display unit 1 and the second display unit 2 shown in fig. 6, the layout of the infrared control unit on the display unit is shown in each case viewed from above the display film 13 with the four display icons 16. For the sake of clarity, the infrared transmitting tube 21 is labeled with T and the infrared receiving tube 22 is labeled with R in these figures.

Fig. 10 shows five infrared elements arranged in the order of transmission-reception-transmission. These five infrared elements are respectively disposed at two corners of the upper face of the four display icons 16. In order to distinguish the operation of each display icon 16, for example, two infrared receiving tubes 22 may be turned on at all times, and three infrared emitting tubes 21 in fig. 10 may be sequentially turned on in sequence and repeated in this cycle; it is also possible to switch on the first and third infrared-emitting tubes 21 first and then the second infrared-emitting tube 21, with a time offset, and to cycle back and forth in accordance with this. It is thus possible to determine at which display icon 16 the hand of the user appears when the infrared receiving tube 22 receives the reflected signal, in conjunction with which infrared transmitting tube 21 is emitting infrared rays at that time.

Fig. 11 shows five infrared elements arranged in the order of receiving-transmitting-receiving. The five infrared elements are disposed at two corners of the upper face of the four display icons 16, respectively. Here, for example, three infrared receiving tubes 22 may be kept on, and two infrared emitting tubes 21 in fig. 11 may be sequentially turned on in sequence and may be cycled back and forth. It is thus possible to determine at which display icon 16 the hand of the user appears, in conjunction with which infrared-emitting tube 21 is emitting infrared rays at the time when the infrared-receiving tube 22 receives the reflected signal.

Fig. 12 shows a layout in which five infrared elements are arranged at half the height of the display icons on both sides of the four display icons 16, respectively. The type of infrared element is not labeled in this figure. In this case, the five infrared elements can be arranged in the order of transmit-receive-transmit shown in fig. 10 on the one hand and in the order of receive-transmit-receive shown in fig. 11 on the other hand.

Fig. 13 shows a layout in which five infrared elements are arranged respectively on two opposite corners of each of the four display icons 16. The type of infrared element is not labeled in this figure. In this case, the five infrared elements can be arranged in the sequence of transmit-receive-transmit shown in fig. 10 on the one hand and in the sequence of receive-transmit-receive shown in fig. 11 on the other hand.

Fig. 14 shows a layout in which five infrared elements are arranged along the diagonal lines of the rectangle covered by four display icons 16, respectively. The type of infrared element is likewise not labeled in this figure. In this case, the five infrared elements can be arranged in the order of transmit-receive-transmit shown in fig. 10 on the one hand and in the order of receive-transmit-receive shown in fig. 11 on the other hand.

As can be seen from fig. 10 to 14, the number of the display icons 16 is not strictly equal to the number of pairs of the infrared transmitting tubes 21 and the infrared receiving tubes 22, and the detection of the infrared operation can be realized only by providing a pair of the infrared transmitting tubes 21 and the infrared receiving tubes 22 around each display icon 16, and the infrared transmitting tubes 21 and/or the infrared receiving tubes 22 in the pair of the infrared transmitting tubes and the infrared receiving tubes can also be multiplexed to the adjacent display icons 16. Further, the line connecting the infrared transmitting tube 21 and the infrared receiving tube 22 does not necessarily have to be arranged parallel to the long side of the display unit, nor does the infrared transmitting tube 21 and the infrared receiving tube 22 necessarily have to be arranged along a straight line. In the embodiments shown in fig. 10 to 14, it is only required that the infrared transmission tubes and the infrared reception tubes should be alternately arranged in such an order of one infrared transmission tube and one infrared reception tube.

Here, it is also clear that, in the present invention, whether the infrared operation unit is the gesture operation unit or the touch operation unit can be controlled by setting or adjusting the light emission intensity of the infrared emission tube 21. Since the infrared ray needs to undergo refraction loss on the solid-air interface twice when detecting the gesture operation, the infrared transmitting tube needs to provide a larger luminous intensity to enable the infrared receiving tube 22 to receive the reflected infrared ray, and a larger driving current should be provided to the infrared transmitting tube 21. In contrast to this, if the infrared operation unit detects only a touch operation, only a smaller light emission intensity and thus a smaller drive current are necessary. It is also advantageous to drive the infrared emitting tube 21 with different currents at different times. It is particularly advantageous to detect both touch and gesture operations in a time-multiplexed manner with the same infrared control unit.

Fig. 15 shows an exploded view of a second embodiment of a human-computer interaction system according to the invention. In addition to the first infrared operation unit provided in the first display unit 1 shown in fig. 9, a second infrared operation unit is also provided in the second display unit 2. For example, the technical contents disclosed in patent document CN113495615A by the present applicant can be referred to for an embodiment of the second infrared operation unit. The infrared operation unit here includes four infrared transmission tubes 21, four infrared reception tubes 22, and a control circuit and a signal processor, which are not shown. Here, the four infrared emission tubes 21 and the four infrared reception tubes 22 may be arranged along the long side of the second display unit 2 with a space therebetween, the control circuit may be configured to control on and off of the respective infrared emission tubes 21 and the respective infrared reception tubes 22, and the signal processor may be configured to receive and process signals generated by the plurality of infrared reception tubes 22, and may particularly determine the coordinate position of the hand of the user in the extending direction above the infrared operation unit. Preferably, the control circuit controls on and off of the respective infrared transmission tubes 21 and the respective infrared reception tubes 22 in a time-division multiplexing manner. Fig. 15 also shows that a cavity 23 for the infrared emitter tube 21 or for the infrared receiver tube 22 is provided in the holder 12, which cavity 23 can likewise be designed as a light-limiting structure for the infrared emitter tube 21 and for the infrared receiver tube 22. The display film 13 is also formed with a hollowed-out or infrared-transmitting portion 24 at a position corresponding to the infrared emission tube 21 and the infrared reception tube 22.

The second infrared operation unit shown in fig. 15 can well detect the user's operation of each displayed icon compared to the case of the first infrared operation unit because here a pair of infrared transmission tube 21 and infrared reception tube 22 is provided in the area where the icon 16 is displayed. In the case shown in fig. 15, one infrared-emitting tube 21 and one infrared-receiving tube 22 are provided above the four LED elements 14 assigned to one display icon 16. In this way, it is possible to accurately detect that the hand of the user is present within the area of each displayed icon 16 and thus detect the user's operation of that displayed icon 16. Although the marking is performed in such an alternating order of one infrared transmission tube 21 and one infrared reception tube 22 in fig. 15, since one infrared transmission tube 21 and one infrared reception tube 22 provided corresponding to each display icon are disposed close to each other and the arrangement order of the infrared transmission tubes 21 and the infrared reception tubes 22 can be arbitrarily set in each infrared transceiving group.

In order to detect the operation of the user with the infrared operation unit shown in fig. 15, the control circuit and the signal processor may be adapted in several ways, for example: the control circuit can simultaneously switch on all the infrared receiving tubes 22 and sequentially switch on each infrared transmitting tube 21; or one or more infrared transmitting and receiving groups are sequentially connected, and each infrared transmitting and receiving group comprises an infrared transmitting tube 21 and an infrared receiving tube 22 which are adjacently arranged; or a plurality of non-adjacent infrared transmitting and receiving groups are switched on in a time staggered manner, and each infrared transmitting and receiving group comprises an infrared transmitting tube 21 and an infrared receiving tube 22 which are arranged adjacently. In the latter two cases, one infrared transmitting tube 21 and one infrared receiving tube 22 provided corresponding to one display icon 16 constitute one infrared transmitting/receiving group for the purpose of detection with temporal and spatial resolution. In one aspect, the infrared operating unit may sequentially turn on the first, second, third, and fourth infrared transceiving sets of fig. 15 in sequence, and may cycle back and forth in this order. On the other hand, the first and third infrared transmitting/receiving groups may be switched on first, and then the second and fourth infrared transmitting/receiving groups may be switched on, in the infrared operating unit, with a time offset, and may be cycled.

Here, it is advantageous to use the infrared operation unit provided in the first display unit 1 as the gesture operation unit and the infrared operation unit provided in the second display unit 2 as the touch operation unit. Thus, it is possible to accurately detect a touch operation of the user's hand on each display icon 16 by touching the display surface 9, and also detect a gesture operation of the user's hand in front of (i.e., above) the display surface 9, such as a leftward swipe, a rightward swipe, a hover, or the like. By means of such a human-computer interaction system, it is possible to create a rich operating possibility for the user in addition to the excellent visual impression and visual experience provided by the display device according to the invention.

Fig. 16 shows a cross-sectional view of a second embodiment of a human-computer interaction system according to the invention. In the figure, the case of a human-computer interaction system installed in a household appliance is shown. Here, the first display unit 1 and the second display unit 2 are accommodated inside a case 25 of the home appliance. In this way, it is only observed on the outside of the household appliance that the human-computer interaction system or the display device protrudes from the substantially transparent part of the housing 25 of the household appliance, and the display content is present in the substantially transparent medium, and the user can see the scenery behind it at least partially through the bevel area in the viewing direction of the hollow arrow, so that an approximately see-through effect can occur. From the perspective of the user, the human-computer interaction system or the display unit appears to be attached to the surface of the household appliance, so that the appearance of the household appliance is novel and unique, and the product impression of intellectualization and science and technology sense is brought to people.

It can also be seen from fig. 16 that the first infrared operation unit disposed in the upper side of the first display unit 1 and the second infrared operation unit disposed in the inner side of the second display unit 2 do not interfere with each other in the emission light path and the reflection light path of the infrared rays. Therefore, the first infrared operation unit and the second infrared operation unit can be operated simultaneously without being affected by each other.

Not only the LED elements 14 but also an infrared emission tube 21 and an infrared reception tube 22 are provided on the circuit board 11 in the first display unit 1 and the second display unit 2. Accordingly, a cavity 15 for the LED element 14 and cavities 23 for the infrared emission tube 21 and the infrared reception tube 22, respectively, are provided in the holder 12. The chambers are each provided as a slightly flared hollow region. However, without being limited thereto, the cavity may also have a cross section that is uniform from top to bottom. In addition, the cavity 23 for the infrared transmitting tube 21 or for the infrared receiving tube 22 is constructed as a light limiting structure. It can also be provided that the cross section of the infrared emission tube 21 and/or the infrared reception tube 22 advantageously occupies 40% to 90% of the cross section of the cavity 23. Preferably, the height of the cavity 23 exceeds the top end of the infrared emission tube 21 and/or the infrared reception tube 22 so as to be able to limit the light emitting angle/receiving angle thereof, whereby the infrared emission tube 21 and the infrared reception tube 22 having a lower cost but a larger light emitting angle/receiving angle can be used.

Fig. 16 also plots infrared rays emitted by the infrared emission tube 21 and infrared rays received by the infrared reception tube 22. The light path of the infrared light emitted by the infrared emission tube 21 is shown by a straight line with a solid small arrow. When the user performs a touch operation or a gesture operation, the infrared rays reflected by the hand of the user return to the adjacent infrared receiving tube 22 again along an opposite optical path, as shown by a straight line with a small hollow arrow in fig. 16.

Fig. 17 shows a household appliance mounted with a display device or a human-computer interaction system according to the present invention. Here, the air conditioner 26 is exemplarily shown, which is configured as an air conditioner indoor unit. According to the utility model discloses a display device or man-machine interaction system can be installed in air conditioner 26 partly through the trompil of air conditioner 26 below, makes the first display element 1 of display device and second display element 2 hold inside the casing of air conditioner 26, and only hangs a part of display device's second prism 4 outside the casing. In other words, only the bezel area 8 of the display device is exposed outside the housing of the air conditioner 26. When the user views the inclined surface area 8 from the front of the air conditioner 26, only a part of the transparent second prism 4 is seen together with the second layer 6 with the transmission and reflection functions on the inclined surface, the display content is presented in the basically transparent medium, and the user can see the scenery behind the inclined surface area at least partially through the inclined surface area 8, so that the effect of approximate perspective can be achieved. From the user's perspective, according to the utility model discloses a display device portion or man-machine interaction system appear to be attached to on the lower surface of air conditioner 26, and this also makes domestic appliance's outward appearance novel unique to give the product impression that brings intellectuality and science and technology sense.

Fig. 17 also shows that the display content of the first display unit 1 and/or the second display unit 2 can be seen on the display surface 9. Here, a snowflake pattern representing the cooling and a number "25" representing the temperature setting are shown on the display surface 9 by way of example. These display contents may be displayed, for example, by an illuminable icon display or a nixie tube display provided in the same display unit or in different display units, respectively. Without being limited thereto, the use of dot matrix display screens is also contemplated.

In the case of installing the human-computer interaction system in the air conditioner 26, additionally, the user's operation, such as a touch operation on the surface of the display surface 9 and/or a gesture operation in front of the display surface 9, may be detected by means of the infrared operation unit therein, so that the user obtains intuitive and convenient interaction, optimizing the use experience. At the same time, it is possible to avoid the need to provide any further keys or buttons around the surface of the display device. Preferably, the human-computer interaction system can also output a control instruction and/or change the display of the display device according to the user operation detected by the infrared operation unit.

The present invention is not limited to the embodiments shown but comprises or extends to all technical equivalents that may fall within the scope of the appended claims. The positional references selected in the description, such as, for example, upper, lower, left, right, etc., refer to the direct description and to the illustrated drawings and can be transferred to new positions in the event of a change in position.

The features disclosed in the present document can be essential for the implementation of the embodiments in terms of different embodiments and can be implemented both individually and in any combination.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any person skilled in the art can use the above-mentioned technical contents to make possible changes and modifications to the technical solution of the present invention without departing from the spirit and scope of the present invention, and therefore, any simple modification, equivalent changes and modifications made to the above embodiments by the technical substance of the present invention all belong to the protection scope of the technical solution of the present invention.

Claims

1. A display device, characterized in that the display device comprises:

a first display unit (1);

a second display unit (2);

a first prism (3) configured as an isosceles right triangular prism;

a second prism (4) which is a straight parallelepiped prism, an isosceles trapezoid prism or an isosceles right triangular prism; and

two layers having both a transmissive and a reflective effect,

the display device comprises a first prism (3) and a second prism (4), wherein the first prism (3) and the second prism (4) are spliced to form a straight quadrangular prism with a right trapezoid bottom surface, a first layer (5) with transmission and reflection functions is arranged between the first prism (3) and the second prism (4), a second layer (6) with transmission and reflection functions is arranged on an inclined surface of the straight quadrangular prism with the right trapezoid bottom surface, the first display unit (1) and the second display unit (2) are perpendicular to each other and adjacently arranged on the first prism and the second prism respectively, and light emitted by the first display unit (1) and light emitted by the second display unit (2) are reflected by the second layer (6) with transmission and reflection functions and then have the same direction.

2. A display device according to claim 1, wherein the first display unit (1) and the second display unit (2) comprise one or more of an illuminable icon display, a nixie tube display and an array display screen, respectively.

3. A display device as claimed in claim 2, characterized in that the illuminable icon display comprises a circuit board (11) integrated with LED elements (14), a display membrane (13) with display icons (16) and a support (12) between the circuit board (11) and the display membrane (13).

4. A display device as claimed in claim 3, characterized in that the holder (12) comprises a plurality of cavities (15), in each cavity (15) at least one of the LED elements (14) being accommodated for illuminating a display icon (16) on the display film (13) arranged in correspondence with the cavity.

5. The display device of claim 2, wherein the nixie tube display is a segmented LED nixie tube and/or the dot matrix display screen is a TFT display screen, an OLED display screen, or a dot matrix LED display screen.

6. A display device as claimed in any one of claims 1 to 5, characterized in that the area of the right quadrangular prism whose base surface is a right trapezoid whose slope is reflected onto the adjacent surface of the right quadrangular prism serves as a display surface.

7. A display device as claimed in one of claims 1 to 5, characterized in that a third prism (10) in the form of an isosceles right triangular prism is additionally arranged on the inclined surface of the straight quadrangular prism whose base surface is in the form of a right trapezoid, so that the first prism (3), the second prism (4) and the third prism (10) jointly form a cuboid.

8. A display device as claimed in any one of claims 1 to 5, characterized in that the first layer (5) having both transmissive and reflective properties and the second layer (6) having both transmissive and reflective properties are transflective layers or electrochromic films.

9. The display device of claim 8, wherein the transflective layer is a transflective film, a transflective layer, or a transflective coating.

10. A display device as claimed in claim 9, characterized in that the transflective layer has a transmission of between 35% and 65%.

11. A display device as claimed in claim 10, characterized in that the transflective layer has a transmission of between 40% and 60%.

12. A display device as claimed in claim 11, characterized in that the transflective layer has a transmission of 50%.

13. A display device as claimed in one of the claims 1 to 5, characterized in that the first display unit (1) and the second display unit (2) are constructed as one piece; and/or the first prism (3) and the second prism (4) are made of inorganic glass, transparent plastic, transparent ceramic, natural crystal or synthetic crystal respectively.

14. A display device according to any of claims 1 to 5, wherein one or both of the first display unit (1) and the second display unit (2) are displaying at the same time.

15. Human-computer interaction system, characterized in that it comprises a display device according to one of claims 1 to 14 and at least one infrared operating unit (20) for detecting user operations, said at least one infrared operating unit (20) being arranged within the first display unit (1) and/or the second display unit (2) of the display device.

16. A human-computer interaction system according to claim 15, characterized in that the at least one infrared operating unit (20) is configured as a gesture operating unit and/or a touch operating unit.

17. A human-computer interaction system according to claim 16, characterized in that each infrared operating unit comprises at least two infrared transmitting tubes (21), at least one infrared receiving tube (22), a control circuit and a signal processor, said control circuit alternately switching on and off said infrared transmitting tubes (21) and/or said infrared receiving tubes (22), and said signal processor receiving and processing signals generated by said infrared receiving tubes (22).

18. Human-computer interaction system according to claim 17, characterized in that the plurality of infrared transmitting tubes (21) and the plurality of infrared receiving tubes (22) are alternately arranged in the extending direction of the display unit in which the infrared operation unit is located.

19. A human-computer interaction system according to any one of claims 15 to 18, wherein the human-computer interaction system outputs control instructions and/or changes the display of the display device in accordance with user operations detected by the infrared operation unit.

20. Household appliance, characterized in that it comprises a display device according to one of claims 1 to 13 or a human-computer interaction system according to one of claims 15 to 19, wherein said first (1) and second (2) display units of said display device are housed inside a casing of said household appliance.

21. The household appliance of claim 20, wherein the household appliance is an air conditioner, a range hood, a stove, a refrigerator, an oven, a dishwasher, a food processor, a washing machine, a clothes dryer, a stereo, a television, an intelligent faucet, or an intelligent toilet.