A touch system and a touch system component assembly

Abstract

A touch system includes a plate with a touch surface, a frame component arranged around the edges of the plate, a set of emitters and a set of detectors supported by the frame component, a first reflective surface arranged on the frame component and configured to reflect light from the emitters across the touch surface, and a transmissive diffuser arranged between the first reflective surface and the emitters / detectors. The touch system provides an efficient and flexible design for detecting touch input on the touch surface.

Description

[0001] A TOUCH SYSTEM AND A TOUCH SYSTEM COMPONENT ASSEMBLY

[0002] Field

[0003] The technology relates to the field of touch-sensitive systems, specifically large-scale interactive touch surfaces and displays used in various applications such as digital signage, interactive whiteboards, and collaborative workspaces.

[0004] Touch screen systems have become increasingly popular in various applications, such as smartphones, tablets, and interactive displays. These systems typically consist of a touch surface, such as a glass or transparent plastic plate, and a series of emitters and detectors that emit and detect light, respectively, to determine the location of a touch input on the touch surface. One common approach to touch screen systems involves the use of infrared (IR) light, which is emitted across the touch surface and detected by detectors on the opposite side of the surface. When a user touches the surface, the IR light is interrupted, allowing the system to determine the location of the touch input.

[0005] In some touch screen systems, the light emitted by the emitters travels through the glass or transparent plastic plate and is diffusively reflected by a metal edge over the touch surface to reach the detectors. This signal path, however, is known to be inefficient, as a significant amount of light is lost due to the diffusive nature of the metal edge, which scatters light in unwanted directions. As a result, a large amount of light needs to be emitted to ensure good signal quality, leading to higher power consumption and costs.

[0006] To address this issue, prior art has proposed the use of a transmissive film on a plastic sealing window placed on top of the glass or transparent plastic plate. In this system, the light emitted by the emitters passes through the glass or transparent plastic plate, is reflected by a mirror, passes through the transmissive diffuser on the plastic sealing window, travels along the plate, and then passes through the transmissive diffuser on the plastic sealing window before reaching the detectors on the other side of the touch surface. While this approach may improve the efficiency of the signal path, it introduces additional components above the touch surface, such as the mirror, the sealing window with the transmissive diffuser, and the metal cover to hold them in place. These components can increase the overall size and complexity of the touch screen system, making it less desirable for certain applications.

[0007] Furthermore, the use of a diffusively reflecting metal edge in the signal path can result in additional light loss, as the metal edge is not optimized for directing light efficiently towards the detectors. The lack of specialized reflective coatings or specific geometric optimizations on the metal edges can contribute to increased light scattering and reduced system efficiency.

[0008] Therefore, there is a need for an improved touch screen system that addresses the inefficiencies in the signal path while minimizing the size and complexity of the system. Additionally, there is a need for a low-cost optical design that reduces the overall cost of the touch screen system by improving the efficiency of light management and reducing the need for high power electronics.

[0009] Summary

[0010] According to a first aspect of the disclosure, a touch system is provided that comprises a plate having a touch surface, a frame component arranged around the edges of the plate, a set of emitters and a set of detectors supported by the frame component, a first reflective surface arranged on the frame component and configured to reflect light from the emitters across the touch surface, and a transmissive diffuser arranged between the first reflective surface and the emitters and I or detectors.

[0011] Optionally in some examples, the transmissive diffuser comprises a transmissive diffuser film. This type of diffuser can scatter the light in a way that it mainly travels over the plate towards the receiving side(s), improving the efficiency of light detection.

[0012] Optionally in some examples, the touch system further comprises a cosmetic component arranged between the first reflective surface and the emitters. This component can enhance the aesthetic appeal of the touch system, by for example blocking visible light to prevent visibility of components below the plate. Optionally in some examples, the cosmetic component comprises a visually opaque IR-transmissive ink. This type of ink can block visible light while allowing infrared light to pass through.

[0013] Optionally in some examples, the transmissive diffuser is attached to the cosmetic component.

[0014] Optionally in some examples, the transmissive diffuser is part of the cosmetic component, making the cosmetic component functional as well This can simplify the structure of the touch system and potentially reduce manufacturing costs.

[0015] Optionally in some examples, the transmissive diffuser comprises a surface structure of the cosmetic component.

[0016] Optionally in some examples, the transmissive diffuser is an embossed structure on the cosmetic component.

[0017] Optionally in some examples, the transmissive diffuser is arranged on top of the cosmetic component.

[0018] Optionally in some examples, the transmissive diffuser is a line type engineered diffuser. These types of diffusers can provide a more uniform distribution of light across the touch surface, improving the accuracy of touch detection.

[0019] Optionally in some examples, the touch system further comprises a display configured to display interactive content controllable using the touch surface.

[0020] Optionally in some examples, the size of the plate ranges from 20 inches to 200 inches diagonal. This wide range of sizes can accommodate various applications and user needs, from small handheld devices to large interactive displays. Optionally in some examples, the first reflective surface comprises an extruded metal surface. This type of surface can act mirror-like, minimizing scattering and improving the efficiency of light reflection.

[0021] Optionally in some examples, the first reflective surface comprises a polished metal surface. This type of surface can reduce scattering, making it more specular and thus improving light management.

[0022] Optionally in some examples, the first reflective surface comprises an extruded and anodized metal surface. This type of surface can provide a high degree of reflectivity, while also being resistant to corrosion and wear.

[0023] Optionally in some examples, the first reflective surface is coated. This can reduce scattering, making it more specular and thus improving light management

[0024] Optionally in some examples, the first reflective surface has a mirror film applied. This can reduce scattering, making it more specular and thus improving light management. Optionally in some examples, the first reflective surface is milled. This can provide a high degree of precision in the shape and orientation of the surface and reduce scattering, making it more specular and thus improving light management

[0025] Optionally in some examples, the touch system further comprises a second reflective surface arranged on the frame component and configured to reflect light from the emitters towards the first reflective surface. This can allow for a longer light path, which can increase the distance between the emitters and the detectors without increasing the thickness of the product, providing greater flexibility in the design of the touch system.

[0026] Optionally in some examples, the emitters are arranged to emit light directly onto the second reflective surface, and the light is reflected towards the first reflective surface and then across the touch surface by the first reflective surface.

[0027] Optionally in some examples, the second reflective surface comprises an extruded metal surface. This type of surface can act mirror-like. Optionally in some examples, the second reflective surface comprises a polished metal surface. This type of surface can provide improved light management.

[0028] Optionally in some examples, the second reflective surface comprises an extruded and anodized metal surface. This type of surface can act mirror-like, while also being resistant to corrosion and wear.

[0029] Optionally in some examples, the second reflective surface is coated. This can improve the light management.

[0030] Optionally in some examples, the second reflective surface has a mirror film applied. This can further enhance the reflectivity of the surface, improving light management.

[0031] Optionally in some examples, the second reflective surface is milled. This can provide a high degree of precision in the shape and orientation of the surface.

[0032] Optionally in some examples, the frame component is made of metal.

[0033] Optionally in some examples, the frame component is made of plastic.

[0034] Optionally in some examples, the emitters and detectors are mounted on a printed circuit board (PCB) positioned under the plate.

[0035] Optionally in some examples, the touch system further comprises a control unit configured to control the overall operation of the touch system and detect touch on the touch surface by detecting interruption of light traveling between the emitters and detectors.

[0036] According to a second aspect of the disclosure, a method of detecting touch on a touch surface of a touch system is provided. The method comprises emitting light from a set of emitters supported by a frame component arranged around edges of a plate having the touch surface, transmitting the light through a transmissive diffuser arranged between a first reflective surface and the emitters, reflecting the light from the emitters across the touch surface using the first reflective surface arranged on the frame component, detecting the light using a set of detectors, and determining a touch on the touch surface based on an interruption of the light detected by the detectors. This method can provide a reliable and accurate way of detecting touch inputs on the touch surface, as any interruption of the light by a touch input is detected by the detectors.

[0037] In another aspect there is provided a touch system component assembly mountable on a touch system having a plate having a touch surface, the touch system component assembly comprising: a frame component configured to be arranged around edges of the plate; a set of emitters and a set of detectors supported by the frame component; a first reflective surface arranged on the frame component and configured to reflect light from the emitters across the touch surface when the frame component is mounted to the plate; and a transmissive diffuser arranged between first reflective surface and emitters and / or detectors.

[0038] Brief Description of the Drawings

[0039] Examples are described in more detail below with reference to the appended drawings. Figure 1 is a system with a folded light path before the transmissive diffuser, which is placed on an L-shaped cosmetic component.

[0040] Figure 2 is a system with a folded light path before the transmissive diffuser, which is a film slotted into the frame component.

[0041] Figure 3 is a system with a direct light path to the transmissive diffuser, which is placed on a cosmetic component that is slotted into the frame component holding the emitters and detectors.

[0042] Figure 4 is a system with a direct path to the transmissive diffuser placed on top of the cosmetic component.

[0043] Figures 5 to 9 is a system with a direct path to the transmissive diffuser according to some other examples.

[0044] Detailed Description The detailed description set forth below provides information and examples of the disclosed technology with sufficient detail to enable those skilled in the art to practice the disclosure.

[0045] Figure 1 shows a touch system 100 with a folded light path before the transmissive diffuser 40, which is placed on an L-shaped cosmetic component 42. The touch system 100 includes a plate 10 with a touch surface 12, a frame component 20 arranged around the edges of the plate 10, a set of emitters 30 and a set of detectors 32 arranged within the frame component 20, and a first reflective surface 22 arranged on the frame component 20 and configured to reflect light from the emitters 30 across the touch surface 12. The transmissive diffuser 40 is arranged between the first reflective surface 22 and the emitters / detectors 30 / 32. The cosmetic component 42 is arranged between the first reflective surface 22 and the emitters 30.

[0046] Figure 2 shows a touch system 100 with a folded light path before the transmissive diffuser 40, which is a film slotted into the frame component 20 holding the electronics. The touch system 100 includes the same functional components as described in Figure 1 , with the difference being the placement of the transmissive diffuser 40 as a film slotted into the frame component 20. Cosmetic component 42 is provided as a film or thin sheet attached to the underside of plate 10.

[0047] Figure 3 shows a touch system 100 with a direct light path to the transmissive diffuser 40, which is placed on a cosmetic component 42 that is slotted into the frame component 20 holding the emitters 30 and detectors 32. The touch system 100 includes the same functional components as described in Figure 1 , with the difference being the direct light path to the transmissive diffuser 40 and the placement of the cosmetic component 42 slotted into the frame component 20.

[0048] Figure 4 shows a touch system 100 with a direct path to the transmissive diffuser 40 placed on top of the cosmetic component 42. The emitter 30 emits light upwards to the first reflective surface 22. The plate 10 with the touch surface 12 is held in a grip of the frame component. The touch system 100 includes the same functional components as described in Figure 1 , with the difference being the direct path to the transmissive diffuser 40 placed on top of the cosmetic component 42. 1. Touch System Details

[0049] The touch system 100 is an interactive device designed to receive and process touch inputs from a user. The system is composed of several key components, each playing a role in the overall operation of the touch system 100. These components include a plate 10, a frame component 20, a set of emitters 30, a set of detectors 32, a first reflective surface 22, a second reflective surface 24, a transmissive diffuser 40, a cosmetic component 42, a control unit, and a display.

[0050] The touch system 100 is designed to be versatile and adaptable, capable of being implemented in a variety of settings and applications. The system can be configured to accommodate different sizes and shapes, making it suitable for a wide range of interactive displays and touch-sensitive devices.

[0051] 1.1. Plate

[0052] The plate 10 is a component of the touch system 100. It serves as the primary interface between the user and the system, receiving touches from a user.

[0053] In some implementations, the plate 10 is made from a material such as glass or transparent plastic. These materials are chosen for their durability, transparency, and ability to transmit light effectively. The transparency of the plate 10 allows it to be used in conjunction with a display, enabling the user to interact with the displayed content through the touch surface 12 of the plate 10.

[0054] The size of the plate 10 can vary depending on the specific application of the touch system 100. In some examples, the size of the plate 10 ranges from 20 inches to 200 inches diagonal. In some examples, the size of the plate 10 is greater than 40 inches. This wide range of sizes allows the touch system 100 to be used in a variety of settings, from small handheld devices to large interactive displays.

[0055] 1 .1 .1 . Touch Surface The touch surface 12 is the top surface of plate 10. When a user touches the touch surface 12, it interrupts the light path between the emitters 30 and detectors 32. This interruption is detected by the control unit based on the signals from detectors 32.

[0056] 1.2. Frame Component

[0057] The frame component 20 is designed to provide structural support to the system, holding the plate 10 and other components in place. The frame component 20 is arranged around the edges of the plate 10, providing a secure and stable structure for the touch system 100.

[0058] In some configurations, the frame component 20 may comprise multiple removable components. This modular design allows for easy assembly and disassembly of the touch system 100, facilitating maintenance and repair. The frame component 20 also provides a housing for the emitters 30 and detectors 32, protecting these sensitive components from damage and ensuring their proper alignment.

[0059] The frame component 20 may comprise first reflective surface 22 and optionally second reflective surface 24. These surfaces are strategically positioned to reflect light from the emitters 30 across the touch surface 12 and towards the detectors 32.

[0060] In some examples, the frame component 20 has a first frame portion 26 and a second frame portion. The first frame portion 26 is a frame body and the second frame portion 28 is a frame rail that extends towards the first frame portion 26. The second frame portion 28 and the first frame portion 26 are arranged to hold a component therebetween. When a component is placed between the first frame portion 26 and the second frame portion 28, the second frame portion 28 exerts are force on the component in a direction towards the first frame portion 26. In this way the frame component 20 can hold and trap a component of the touch system 100 without additional parts e.g. the frame component 20 holds the cosmetic component 42 between the first frame portion 26 and the second frame portion 28. The first frame portion 26 and the second frame portion 28 optionally comprise grooves, pegs, pins or other structural features to receive and engage the component held therebetween. 1 .2.1 . First Reflective Surface

[0061] The first reflective surface 22 is a component of the frame component 20 and plays a role in the operation of the touch system 100. The primary function of the first reflective surface 22 is to reflect light from the emitters 30 across the touch surface 12 and towards the detectors 32. This reflection of light enables the touch system 100 to detect touch inputs on the touch surface 12. The first reflective surface 22 also reflects light from the emitters 30 towards the touch surface 12 and the detectors 32.

[0062] The first reflective surface 22 can be made from a variety of materials. In some implementations, it is an extruded metal surface of the frame component 20. This could be a raw extruded metal surface, a polished metal surface, or an extruded and anodized metal surface. These surface properties are chosen for their reflective properties, which enable them to effectively reflect light from / to the emitters / detectors 30 / 32.

[0063] The first reflective surface 22 can also be treated or modified to enhance its reflective properties. For example, it can be coated or have a mirror film applied. These treatments act to make the first reflective surface 22 mirror-like, minimizing scattering and improving light management.

[0064] 1.2.2. Second Reflective Surface

[0065] The second reflective surface 24 folds the optical path from the emitter / detector 30 / 32 to the first reflective surface 22, providing more options for the mechanical design.

[0066] In some implementations, the second reflective surface 24 is an extruded metal surface of frame component 20. This could be a raw extruded metal surface, a polished metal surface, or an extruded and anodized metal surface. These materials are chosen for their reflective properties, which enable them to effectively reflect light from the emitters 30 / towards the detectors 32.

[0067] Like the first reflective surface 22, the second reflective surface 24 can also be treated or modified to enhance its reflective properties. For example, it can be coated or have a mirror film applied. These treatments act to make the second reflective surface 24 mirror-like.

[0068] 1 .3. Emitters

[0069] The emitters 30 are responsible for emitting infrared (IR) light across the touch surface 12 of the plate 10, via reflective surfaces and diffusers, creating a light path that spans the touch surface 12 and reaches the detectors 32.

[0070] 1.4. Detectors

[0071] The detectors 32 are designed to detect the IR light emitted by the emitters 30. The detectors 32 play a role in the operation of the touch system 100, as they enable the system to detect touch inputs on the touch surface 12.

[0072] 1.5. Transmissive Diffuser

[0073] The transmissive diffuser 40 is a component of the touch system 100 that is designed to scatter light so that it mainly travels parallel to the plate 10 towards receiving sides. In particular, scattering in the directions of the touch plate surface normal should not be larger than needed for handling of optical effects and mechanical tolerances. The diffuser is designed to scatter light more efficiently in the plane of the touch plate than out of the plane of the touch plate, i.e. Scatter light more in the plane than out of the plane. The person skilled in the art understands the intended combined effect of the diffusers and that the reflective surfaces will have on the scattering directions. This improves the light management, ensuring that the touch system 100 can accurately detect touch inputs on the touch surface 12.

[0074] In some examples, the transmissive diffuser 40 is a line type engineered diffuser. This type of diffuser is designed to scatter light in a specific pattern, ensuring that the light is distributed more evenly across the touch surface 12. This ensures that the touch system 100 can accurately detect touch inputs, regardless of where they occur on the touch surface 12. The transmissive diffuser 40 is typically arranged between the first reflective surface 22 and the emitters / detectors 30 / 32. This positioning ensures that the light emitted by the emitters 30 is scattered effectively, improving light management. The transmissive diffuser 40 may also be attached to the cosmetic component 42, which can help to minimize light losses compared to a diffuser implemented with a metal edge on top of the plate 10.

[0075] 1 .6. Cosmetic Component

[0076] The cosmetic component 42 is a part of the touch system 100 that serves both functional and aesthetic purposes. Functionally, it can be used to hold or support other components of the touch system 100, such as the transmissive diffuser 40. Aesthetically, it can be designed to enhance the overall appearance of the touch system 100, making it more appealing to users. For example, the cosmetic component 42 is a cosmetic structural component 42 that provides a component supporting or component holding function whilst enhances the visual appearance of the touch system 100. This means that less components are required in the touch system 100 because additional aesthetic components are not required to hide unsightly structural components. The cosmetic structural component 42 can couple two parts of the frame component 20 together to improve the rigidity of the frame component 20.

[0077] In some examples, the cosmetic component 42 is L-shaped and is arranged between the plate 10 and the frame component 20, along an edge surface of the plate 10. This configuration allows the cosmetic component 42 to provide support to the plate 10 and at the same time protect the edge of the plate, while also contributing to the overall aesthetic design of the system.

[0078] The cosmetic component 42 can also be used to hold the transmissive diffuser 40. In some implementations, the transmissive diffuser 40 is attached to the cosmetic component 42. This configuration minimizes light losses compared to a diffuser implemented with a metal edge on top of the plate 10, improving the efficiency of light detection. In some examples the cosmetic structural component 42 extends in a plane parallel with a plane of the plate 10. This means that the touch system 100 can be compact. Furthermore a portion of the cosmetic structural component 42 that the light signal passes through extends in a plane parallel with a plane of the plate 10.

[0079] In some configurations, the transmissive diffuser 40 may be part of the cosmetic component 42. For example, the transmissive diffuser 40 may comprise a surface structure of the cosmetic component 42, such as an embossed structure. This integrated design can further enhance the efficiency of light detection, while also contributing to the overall aesthetic design of the touch system 100.

[0080] 1.6.1. Black IR-Transmissive Ink

[0081] In some implementations, the cosmetic component 42 comprises a visually opaque IR-transmissive ink. This ink is designed to block visible light to prevent visibility of components below the plate 10, improving the overall aesthetic appearance of the touch system 100. The ink may be black.

[0082] Despite being visually opaque, the ink is IR-transmissive, meaning that it allows IR light to pass through. This ensures that the operation of the touch system 100 is not affected by the presence of the ink. The ink can be applied to the cosmetic component 42 in a variety of ways, depending on the specific design and requirements of the touch system 100.

[0083] In some embodiments, the visually opaque IR-transmissive ink is applied to the transmissive diffuser 40 itself. In some embodiments, the dyed transmissive diffuser 40 is combined with the cosmetic component 42 with the visually opaque IR- transmissive ink to combine the optical effects.

[0084] 1 .7. Control Unit

[0085] The control unit is a component of the touch system 100 that is responsible for controlling the overall operation of the system. It coordinates the operation of the emitters 30 and detectors 32, ensuring that they function correctly and efficiently. The control unit also processes the signals received from the detectors 32, enabling it to detect touch on the touch surface 12 by detecting interruption of light travelling between the emitters 30 and detectors 32.

[0086] The control unit is typically a microprocessor or similar device, capable of executing a variety of tasks and operations. It is programmed with software that controls the operation of the touch system 100, including the emission of light by the emitters 30, the detection of light by the detectors 32, and the processing of touch inputs. It is connected to the emitters 30 and detectors 32, as well as other components of the touch system 100, via a series of electrical connections.

[0087] 1 .8. Display

[0088] The display is a component of the touch system 100 that is used to display interactive content that can be controlled using the touch surface 12. The display is typically located beneath the plate 10, allowing the user to interact with the displayed content through the touch surface 12.

[0089] The display can be any type of display technology, including but not limited to LCD, LED, OLED, or e-ink displays. The display is designed to provide high-quality, clear, and vibrant images, ensuring a pleasant and engaging user experience.

[0090] The display may be controlled by the control unit, which determines what content is displayed based on the user's interactions with the touch surface 12. The display and the touch surface 12 work together to provide an interactive experience, allowing the user to control and interact with the displayed content using touch inputs.

[0091] Reference will now be made with respect to Figures 5 to 8 which show other examples of the touch system 100.

[0092] Figure 5 shows a touch system 100 which is the same as shown in Figure 4 except that the shape of the frame component 20 has been modified. Here the frame component 20 comprises an internal rail 50 is reduced in thickness and protrudes less into an internal void 52 within the frame component 20. This reduces the overall thickness of the frame component. Furthermore, the frame component 20 comprises at least one gripping element 54. The gripping element 54 is arranged to engage a surface of the plate 10 and urge the plate 10 towards the frame component 20 or another frame component 20. As shown in Figure 5, the frame component 20 comprises an edge recess 56 for receiving the plate 10. The edge recess 56 comprises at least one gripping element 54 positioned on a side of the plate 10.

[0093] The first gripping element 54 engages the plate 10 on the same side as the touch surface 12 and the second gripping element 54 engages the opposite side of the plate 10 as the touch surface 12 and the cosmetic component 42. The first gripping element 54 engages the edge recess 56 and the plate 10. The second gripping element 54 is opposite the first gripping element 54 and engages the plate 10 and the cosmetic component 42. A third gripping element 54 engages a peripheral edge of the plate 10 and is mounted between the edge of the plate 10 and the edge recess 56.

[0094] Whilst the transmissive diffuser 40 is shown as a separate film mounted on the cosmetic component 42, in some examples, the transmissive diffuser 40 is integral with the cosmetic component 42. That is, the cosmetic component 42 performs the function of both the cosmetic component 42 and the transmissive diffuser 40 is discussed with reference to previous examples.

[0095] Figure 6 shows a similar arrangement to Figure 5 except that the frame component 20 has a different form. Similar to Figure 5, the touch system 100 of Figure 6 has at least one gripping element 54. As shown in Figure 6, the frame component 20 comprises an edge recess 56 for receiving the plate 10. The edge recess 56 comprises first and second gripping elements 54 positioned on opposite sides of the plate 10. The first gripping element 54 engages the plate 10 on the same side as the touch surface 12 and the second gripping element 54 engages the opposite side of the plate 10 as the touch surface 12. Similarly a third gripping element 54 engages a peripheral edge of the plate 10 and is mounted between the edge of the plate 10 and the edge recess 56. The other features as shown in Figure 6 are the same as described in reference to Figure 3. Figure 7 shows another example of the touch system 100. The arrangement of the emitters / detectors 30 / 32 is the same as described in reference to the previous examples shown in Figure 3.

[0096] Figure 7 has a sealing window element 60 which engages the plate 10 and the frame component 20. The sealing window 60 in some examples engages the peripheral edge of the plate 10. The coupling between the sealing window 60 and the peripheral edge of the plate 10 can be due to the frame component 20 urging the sealing window 60 against the plate 10. In other examples, the sealing window 60 can be connected to the peripheral edge of the plate 10 e.g. with adhesive (not shown).

[0097] The sealing window 60 as shown in Figure 7 is transmissive and permits the transmission of the light signal from the emitters / detectors 30 / 32 therethrough. The sealing window 60 comprises the transmissive diffuser 40 on an internal surface of the sealing window 60 that faces the emitters / detectors 30 / 32. In some examples additionally, the sealing window 60 can provide the same functionality as the cosmetic component previously described. That is the sealing window 60 is also the cosmetic component 42.

[0098] The sealing window element 60 seals the internal components of the touch system 100, particularly the emitters 30, detectors 32, and the transmissive diffuser 40, from external contaminants such as dust, moisture, and debris. This protection helps maintain the performance and longevity of the touch system 100 by preventing interference with the optical path and damage to sensitive components. Simultaneously, the sealing window element 60, being transmissive to light, allows the light signals to pass through unimpeded, enabling touch detection functionality. In some embodiments, the sealing window element 60 may also integrate the function of the cosmetic component 42, further streamlining the design and minimizing the number of separate components.

[0099] The sealing window 60 as shown in Figure 7 comprises a flange portion 64 that slidably engages with a reciprocal recess 62 in the frame component 20. The flange portion 64 as shown in Figure 7 comprises a dove tail cross sectional shape that snap fits into the reciprocal recess 62. This means that the sealing window 60 can either be snap fitted into the frame component 20 or be slid into reciprocal recess 62 along a longitudinal axis of the frame component 20. The cross sectional shape of the flange portion 64 can be any suitable shape such that the sealing window 60 is held in place by the frame component 20.

[0100] In some examples the plate 10 as shown in Figure 7 does not have a glass or plastic cover. Accordingly, the plate 10 as shown in Figure 7 is a touch surface without a cover glass component. The sealing window 60 can contain attached optical films depending on use case. The touch system 100 is mounted from top, side or from under depending on type of display (not shown). The touch system can be full length or shorter modular one to be easily scaled especially for a modular uLED-wall. Optionally, the arrangement as shown in Figure 7 can also be used for an overlay design but excludes a cover glass which reduces the weight of the touch system 100.

[0101] Figure 8 shows a touch system 100 similar to the touch systems 100 described in reference to the previous examples and Figures. Figure 8 differs because the transmssive diffuser 40 is mounted on the surface of the plate 10. In the example as shown in Figure 8, the cosmetic component 42 is optional and not present in Figure 8. The plate 10 is received in an edge recess 56 and at least one gripping element 54 engages the surfaces of the plate 10 as discussed previously in reference to Figures 5 to 7.

[0102] In some examples, the set of emitters 30 and the set of detectors 32, the first reflective surface 22 and the transmissive diffuser 40 are aligned along the same straight axis. E.g. there is direct line of sight between the set of emitters 30 and the set of detectors 32, the first reflective surface 22 and the transmissive diffuser 40. Additionally the cosmetic component 42 may also be aligned along the same straight axis.

[0103] Figure 9 shows another shows a touch system 100 similar to the touch systems 100 described in reference to the previous examples and Figures. Here, the transmssive diffuser 40 is mounted on the underside of the plate 10 adajcent to the frame component 20. The arrangement as shown in Figure 9 provides an aesethically pleassing product with a minimal edge thickness. Optionally, in Figure 9 the cosmetic component 42 is not provided. The touch system 100 as shown in the Figures comprises a touch system component assembly comprising the frame component 20, the emitters 30 and the detectors 32, the first reflective surface 22 and the transmissive diffuser 40. The touch system component assembly is mountable to the plate 10. This means that the touch system component assembly is retrofitable to existing plates 10 of touch systems 100 or mountable to a variety of different plates 10 of touch systems 100..

[0104] Example 1 . A touch system (100) comprising: a plate (10) having a touch surface (12); a frame component (20) arranged around edges of the plate (10); a set of emitters (30) and a set of detectors (32) supported by the frame component (20); a first reflective surface (22) arranged on the frame component (20) and configured to reflect light from the emitters (30) across the touch surface (12); and a transmissive diffuser (40) arranged between first reflective surface (22) and emitters and I or detectors (30, 32).

[0105] Example 2. The touch system (100) according to example 1 , wherein the transmissive diffuser (40) comprises a transmissive diffuser film.

[0106] Example 3. The touch system (100) according to any of examples 1 to 2, further comprising a cosmetic component (42) arranged between first reflective surface (22) and emitters (30) and under plate (10).

[0107] Example 4. The touch system (100) according to example 3, wherein the cosmetic component (42) comprises a visually opaque IR-transmissive ink.

[0108] Example 5. The touch system (100) according to any of examples 3 to 4, wherein the transmissive diffuser (40) is attached to the cosmetic component (42).

[0109] Example 6. The touch system (100) according to any of examples 3 to 5, wherein the transmissive diffuser (40) is part of the cosmetic component (42).

[0110] Example 7. The touch system (100) according to example 6, wherein the transmissive diffuser (40) comprises a surface structure of the cosmetic component (42). Example 8. The touch system (100) according to example 7, wherein the transmissive diffuser (40) is an embossed structure on the cosmetic component (42).

[0111] Example 9. The touch system (100) according to any of examples 6 to 8, wherein the transmissive diffuser (40) is arranged on top of the cosmetic component (42).

[0112] Example 10. The touch system (100) according to any of examples 1 to 9, wherein the transmissive diffuser (40) is a line type of engineered diffuser.

[0113] Example 11. The touch system (100) according to any of examples 1 to 10, further comprising a display configured to display interactive content controllable using the touch surface (12).

[0114] Example 12. The touch system (100) according to any of examples 1 to 11 , wherein the size of the plate (10) ranges from 20 inches to 200 inches diagonal.

[0115] Example 13. The touch system (100) according to any of examples 1 to 12, wherein the first reflective surface (22) comprises an extruded metal surface.

[0116] Example 14. The touch system (100) according to any of examples 1 to 12, wherein the first reflective surface (22) comprises a polished metal surface.

[0117] Example 15. The touch system (100) according to any of examples 1 to 12, wherein the first reflective surface (22) comprises an extruded and anodized metal surface.

[0118] Example 16. The touch system (100) according to any of examples 1 to 12, wherein the first reflective surface (22) is coated.

[0119] Example 17. The touch system (100) according to any of examples 1 to 12, wherein the first reflective surface (22) has a mirror film applied.

[0120] Example 18. The touch system (100) according to any of examples 1 to 12, wherein the first reflective surface (22) is milled and / or polished. Example 19. The touch system (100) according to any of examples 1 to 18, further comprising a second reflective surface (24) arranged on the frame component (20) and configured to reflect light from the emitters (30) towards the first reflective surface (22).

[0121] Example 20. The touch system (100) according to example 19, wherein the emitters (30) are arranged to emit light directly onto the second reflective surface (24), and the light is reflected towards the first reflective surface (22) and then across the touch surface (12) by the first reflective surface (22).

[0122] Example 21 . The touch system (100) according to any of examples 19 to 20, wherein the second reflective surface (24) comprises an extruded metal surface.

[0123] Example 22. The touch system (100) according to any of examples 19 to 20, wherein the second reflective surface (24) comprises a polished metal surface.

[0124] Example 23. The touch system (100) according to any of examples 19 to 20, wherein the second reflective surface (24) comprises an extruded and anodized metal surface.

[0125] Example 24. The touch system (100) according to any of examples 19 to 23, wherein the second reflective surface (24) is coated.

[0126] Example 25. The touch system (100) according to any of examples 19 or 23, wherein the second reflective surface (24) has a mirror film applied.

[0127] Example 26. The touch system (100) according to any of examples 19 or 23, wherein the second reflective surface (24) is milled.

[0128] Example 27. The touch system (100) according to any of examples 1 to 26, wherein the frame component (20) is made of metal.

[0129] Example 28. The touch system (100) according to any of examples 1 to 27, wherein the emitters (30) and detectors (32) are mounted on a printed circuit board (PCB) positioned under the plate (10). Example 29. The touch system (100) according to any of examples 1 to 28, further comprising a control unit configured to control the overall operation of the touch system (100) and detect touch on the touch surface (12) by detecting interruption of light traveling between the emitters (30) and detectors (32).

[0130] Example 30. A method of detecting touch on a touch surface (12) of a touch system (100), the method comprising: emitting light from a set of emitters (30) supported by a frame component (20) arranged around edges of a plate (10) having the touch surface (12); transmitting the light through a transmissive diffuser (40) arranged between a first reflective surface (22) and the emitters and I or detectors (30, 32); reflecting the light from the emitters (30) across the touch surface (12) using the first reflective surface (22) arranged on the frame component (20); detecting the light using a set of detectors (32); and determining a touch on the touch surface (12) based on an interruption of the light detected by the detectors (32).

[0131] The terminology used herein is for the purpose of describing particular aspects only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. It will be further understood that the terms "comprises," "comprising," "includes," and / or "including" when used herein specify the presence of stated features, integers, actions, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, actions, steps, operations, elements, components, and / or groups thereof.

[0132] It will be understood that, although the terms first, second, etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element without departing from the scope of the present disclosure. Relative terms such as "below" or "above" or "upper" or "lower" or "horizontal" or "vertical" may be used herein to describe a relationship of one element to another element as illustrated in the Figures. It will be understood that these terms and those discussed above are intended to encompass different orientations of the device in addition to the orientation depicted in the Figures. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element, or intervening elements may be present. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements present.

[0133] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms used herein should be interpreted as having a meaning consistent with their meaning in the context of this specification and the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0134] It is to be understood that the present disclosure is not limited to the aspects described above and illustrated in the drawings; rather, the skilled person will recognize that many changes and modifications may be made within the scope of the present disclosure and appended claims. In the drawings and specification, there have been disclosed aspects for purposes of illustration only and not for purposes of limitation, the scope of the disclosure being set forth in the following claims.

Claims

Claims1 . A touch system (100) comprising: a plate (10) having a touch surface (12); a frame component (20) arranged around edges of the plate (10); a set of emitters (30) and a set of detectors (32) supported by the frame component (20); a first reflective surface (22) arranged on the frame component (20) and configured to reflect light from the emitters (30) across the touch surface (12); and a transmissive diffuser (40) arranged between first reflective surface (22) and emitters and / or detectors (30 / 32).

2. The touch system (100) according to claim 1 , wherein the transmissive diffuser (40) comprises a transmissive diffuser film.

3. The touch system (100) according to any of claims 1 to 2, further comprising a cosmetic structural component (42) arranged between first reflective surface (22) and emitters and / or detectors (30 / 32) and under the plate (10).

4. The touch system (100) according to claim 3, wherein the cosmetic structural component (42) comprises a visually opaque IR-transmissive ink.

5. The touch system (100) according to any of claims 3 to 4, wherein the transmissive diffuser (40) is attached to the cosmetic structural component (42).

6. The touch system (100) according to any of claims 3 to 5, wherein the transmissive diffuser (40) is part of the cosmetic structural component (42).

7. The touch system (100) according to claim 6, wherein the transmissive diffuser (40) comprises a surface structure of the cosmetic structural component (42).

8. The touch system (100) according to claim 7, wherein the transmissive diffuser (40) is an embossed structure on the cosmetic structural component (42).

9. The touch system (100) according to any of claims 6 to 8, wherein the transmissive diffuser (40) is arranged on top of the cosmetic structural component (42).

10. The touch system (100) according to any of claims 1 to 9, wherein the transmissive diffuser (40) is a line type engineered diffuser.11 . The touch system (100) according to any of claims 1 to 10, wherein the set of emitters (30) and the set of detectors (32), the first reflective surface (22) and the transmissive diffuser (40) are aligned along the same straight axis.

12. The touch system (100) according to any of claims 3 to 11 , wherein the cosmetic structural component (42) is held between a first frame portion (26) and a second frame portion (28) of the frame component (20).

13. The touch system (100) according to any of claims 3 to 12, wherein the cosmetic structural component (42) extends in a plane parallel with a plane of the plate (10).

14. The touch system (100) according to any of claims 1 to 13, further comprising a sealing window element (60) configured to engage the plate (10) and the frame component (20), the sealing window element (60) being transmissive to light and comprising the transmissive diffuser (40) on an internal surface facing the emitters (30) and detectors (32).

15. The touch system (100) of claim 14, wherein the sealing window element (60) further functions as the cosmetic component (42).

16. The touch system (100) of any of claims 14 or 15, wherein the sealing window element (60) comprises a flange portion (64) configured to slidably engage a reciprocal recess (62) in the frame component (20).

17. The touch system of claim 16, wherein the flange portion (64) comprises a dovetail shape for snap-fitting engagement with the reciprocal recess (62).

18. The touch system of any one of claims 14 to 17, wherein the sealing window element (60) is configured to engage a peripheral edge of the plate (10).

19. A touch system component assembly mountable on a touch system (100) having a plate (10) having a touch surface (12), the touch system component assembly comprising: a frame component (20) configured to be arranged around edges of the plate (10); a set of emitters (30) and a set of detectors (32) supported by the frame component (20); a first reflective surface (22) arranged on the frame component (20) and configured to reflect light from the emitters (30) across the touch surface (12) when the frame component (20) is mounted to the plate (10); and a transmissive diffuser (40) arranged between first reflective surface (22) and emitters and / or detectors (30 / 32).

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