WO2016130074A1 - Optical touch system comprising means for projecting and detecting light beams above and inside a transmissive panel - Google Patents
Optical touch system comprising means for projecting and detecting light beams above and inside a transmissive panel Download PDFInfo
- Publication number
- WO2016130074A1 WO2016130074A1 PCT/SE2016/050098 SE2016050098W WO2016130074A1 WO 2016130074 A1 WO2016130074 A1 WO 2016130074A1 SE 2016050098 W SE2016050098 W SE 2016050098W WO 2016130074 A1 WO2016130074 A1 WO 2016130074A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- touch
- emitters
- detectors
- touch surface
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/32—Means for saving power
- G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
- G06F1/3206—Monitoring of events, devices or parameters that trigger a change in power modality
- G06F1/3231—Monitoring the presence, absence or movement of users
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/26—Power supply means, e.g. regulation thereof
- G06F1/32—Means for saving power
- G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
- G06F1/3234—Power saving characterised by the action undertaken
- G06F1/325—Power saving in peripheral device
- G06F1/3262—Power saving in digitizer or tablet
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0428—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by sensing at the edges of the touch surface the interruption of optical paths, e.g. an illumination plane, parallel to the touch surface which may be virtual
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04102—Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04104—Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04106—Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04108—Touchless 2D- digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface without distance measurement in the Z direction
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04109—FTIR in optical digitiser, i.e. touch detection by frustrating the total internal reflection within an optical waveguide due to changes of optical properties or deformation at the touch location
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Definitions
- Optical touch system comprising means for projecting and detecting light beams above and inside a transmissive panel
- the present invention generally relates to improved touch determination on
- touch surfaces of optical touch-sensing systems and in particular in relation to FTIR-based (frustrated total internal reflection) touch systems.
- a plurality of optical emitters and optical receivers are arranged around the periphery of a touch surface to create a grid of intersecting light paths above the touch surface.
- Each light path extends between a respective emitter/receiver pair.
- An object that touches the touch surface will block certain ones of the light paths.
- a processor can determine the location of the intercept between the blocked light paths. This type of system is only capable of detecting the location of one object (single-touch detection). Further, the required number of emitters and receivers, and thus cost and complexity, increases rapidly with
- each optical emitter emits a
- each emitter creates more than one light path across the touch surface.
- a large number of light paths are created by sequentially activating different emitters around the periphery of the touch surface, and detecting the light received from each emitter by a plurality of optical receivers.
- transmission path may become unintentionally interrupted and the
- Figure 1 illustrates an example of a touch-sensitive apparatus 100 that is
- the apparatus operates by transmitting light inside a transmissive panel 10, from light emitters 30a to light sensors or detectors 30b, so as to illuminate a touch surface 20 from within the transmissive panel 10.
- the transmissive panel 10 is made of solid material in one or more layers and may have any shape.
- the transmissive panel 10 defines an internal radiation propagation channel, in which light propagates by internal reflections.
- the propagation channel is defined between the touch surface 20 and bottom surface 25 of the transmissive panel 10, where the touch surface 20 allows the propagating light to interact with touching object 60 and thereby defines the touch surface 20.
- This is achieved by injecting the light into the transmissive panel 10 via coupling element 40 such that the light is reflected by total internal reflection (TIR) in the touch surface 20 as it propagates through the transmissive panel 10.
- TIR total internal reflection
- the light may be reflected by TIR on the bottom surface 25 or against a reflective coating thereon.
- the light is coupled out of transmissive panel 10 and onto detectors 30b.
- the touch-sensitive apparatus 100 may be designed to be overlaid on or integrated into a display device or monitor.
- US8553014 describes an optical coupling technique for introducing light into a transmissive panel and above a transmissive panel simultaneously.
- the in-coupling component shown in figure 126 of US8553014 is a complex prism and appears to rely on total internal reflection and diffraction to couple the light above the touch surface.
- Such an arrangement would be highly tolerance sensitive, making the optical signal highly sensitive to, for example, the load on the touch surface, the tolerances of process used to mount the prism to the transmissive panel, and the manufacturing of both the transmissive panel and the prism.
- the spread of the light in a plane parallel to the transmissive panel is limited to a range of less than 80 degrees as light outside this range will be diffracted up and away from the panel.
- An embodiment of the invention provides a touch sensing apparatus
- a light transmissive element that defines a touch surface
- a set of emitters arranged around the periphery of the touch surface to emit beams of light into the light transmissive element, wherein a first portion of the beams of light propagate inside the light transmissive element while illuminating the touch surface such that an object touching the touch surface causes an attenuation of the propagating light, and wherein a second portion of the beams of light pass out of the light transmissive element and are reflected to travel above the touch surface
- a set of light detectors arranged around the periphery of the touch surface to receive light from the set of emitters from the transmissive element and from above the touch surface, wherein each light detector is arranged to receive light from more than one emitter
- a processing element configured to determine, based on output signals of the light detectors, a light energy value for each light path; to generate a transmission value for each light path based on the light energy value; and to operate an image reconstruction algorithm on at least part of the thus-generated transmission
- Figure 1 shows a cross section of an FTIR-based touch-sensitive apparatus according to the prior art.
- Figure 2 is a top plan view of an FTIR-based touch-sensitive apparatus.
- Figure 3 shows a section view of an extended FTI R touch system according to an embodiment of the present invention.
- Figure 4 shows a top plan view of an extended FTIR touch system
- Figure 5 shows the narrow detection lines within transmissive panel 10.
- Figure 6 shows the broad detection lines above transmissive panel 10.
- Figure 7 shows the signal profile of detection lines 95 and detection lines 96.
- Figure 8 shows an embodiment of the present invention in which the touch surface is curved.
- Figure 9 shows an embodiment of the present invention with deflectors set back from the edge of the active area.
- Figure 10 shows an embodiment of the present invention having a dust shield.
- Figure 11 shows an embodiment of the present invention having a first set of emitters and detectors for projecting light above transmissive panel 10 and a second set of emitters and detectors for projecting light into transmissive panel 10.
- Figure 12 shows a top plan view of the Figure 1 1.
- Figure 13 shows a variation of figure 11 wherein the emitters are configured to simultaneously project light above and into transmissive panel 10.
- Figure 14 shows a variation of figure 1 1 wherein the detectors are
- transmissive panel 10 configured to simultaneously receive light from above and from within transmissive panel 10.
- a “touch object” or “touching object” is a physical object that touches, or is brought in sufficient proximity to, a touch surface so as to be detected by one or more sensors in the touch system.
- the physical object may be animate or inanimate.
- a "touch” denotes a point of interaction as seen in the interaction pattern.
- Figure 2 illustrates a top plan view of figure 1 in an example of a
- touch-sensitive apparatus 100 that is based on the concept of FTIR.
- Emitters 30a are distributed around the periphery of touch surface 20, to project light into the transmissive panel 10 such that at least part of the light is captured inside the transmissive panel 10 for propagation by internal reflection in the propagation channel.
- Detectors 30b are distributed around the periphery of touch surface 20, to receive part of the propagating light. The light from each of emitters 30a will thereby propagate inside the transmissive panel 10 to a number of different detectors 30b on a plurality of light paths D.
- the light paths D may conceptually be represented as "detection lines” that extend across the touch surface 20 to the periphery of touch surface 20 between pairs of emitters 30a and detectors 30b, as shown in figure 2.
- the detection lines D correspond to a projection of the light paths D onto the touch surface 20.
- the emitters 30a and detectors 30b collectively define a grid of detection lines D ("detection grid") on the touch surface 20, as seen in a top plan view.
- the spacing of intersections in the detection grid defines the spatial resolution of the touch-sensitive apparatus 100, i.e. the smallest object that can be detected on the touch surface 20.
- the width of the detection line is a function of the width of the emitters and corresponding detectors.
- a wide detector detecting light from a wide emitter provides a wide detection line with a broader surface coverage, minimising the space in between detection lines which provide no touch coverage.
- a disadvantage of broad detection lines may be the reduced touch precision and lower signal to noise ratio.
- the emitters 30a may be any type of device capable of emitting radiation in a desired wavelength range, for example a diode laser, a VCSEL (vertical-cavity surface-emitting laser), an LED (light-emitting diode), an incandescent lamp, a halogen lamp, etc.
- the emitters 30a may also be formed by the end of an optical fiber.
- the emitters 30a may generate light in any wavelength range. The following examples presume that the light is generated in the infrared (IR), i.e. at wavelengths above about 750 nm.
- the detectors 30b may be any device capable of converting light (in the same wavelength range) into an electrical signal, such as a photo-detector, a CCD device, a CMOS device, etc.
- the detectors 30b collectively provide an output signal, which is received and sampled by a signal processor 130.
- the output signal contains a number of sub-signals, also denoted "projection signals", each representing the energy of light received by one of light detectors 30b from one of light emitters 30a.
- the signal processor 130 may need to process the output signal for separation of the individual projection signals.
- the projection signals represent the received energy, intensity or power of light received by the detectors 30b on the individual detection lines D. Whenever an object touches a detection line D, the received energy on this detection line is decreased or "attenuated".
- the signal processor 130 may be configured to process the projection
- a property of the touching objects such as a position (e.g. in a x,y coordinate system), a shape, or an area.
- This determination may involve a straight-forward triangulation based on the attenuated detection lines, e.g. as disclosed in US7432893 and
- WO2010/015408 or a more advanced processing to recreate a distribution of attenuation values (for simplicity, referred to as an "attenuation pattern") across the touch surface 20, where each attenuation value represents a local degree of light attenuation.
- the attenuation pattern may be further processed by the signal processor 130 or by a separate device (not shown) for determination of a position, shape or area of touching objects.
- the attenuation pattern may be generated e.g. by any available algorithm for image reconstruction based on projection signal values, including tomographic reconstruction methods such as Filtered Back Projection, FFT-based algorithms, ART (Algebraic Reconstruction Technique), SART (Simultaneous Algebraic Reconstruction Technique), etc.
- the attenuation pattern may be generated by adapting one or more basis functions and/or by statistical methods such as Bayesian inversion. Examples of such reconstruction functions designed for use in touch determination are found in WO2009/077962, WO201 1/04951 1 ,
- the apparatus 100 also includes a controller 120 which is connected to selectively control the activation of the emitters 30a and, possibly, the readout of data from the detectors 30b.
- the emitters 30a and/or detectors 30b may be activated in sequence or concurrently, e.g. as disclosed in US8581884.
- the signal processor 130 and the controller 120 may be configured as separate units, or they may be incorporated in a single unit.
- One or both of the signal processor 130 and the controller 120 may be at least partially implemented by software executed by a processing unit 140.
- Figure 3 illustrates an embodiment of the invention extending the FTIR system of figure 1 to include touch detection lines above touch surface 20.
- figure 3 shows an embodiment of the invention in which light travels inside a transmissive panel 10, from light emitters 30a to detectors 30b, so as to illuminate a touch surface 20 from within the transmissive panel 10.
- the transmissive panel 10 is made of solid material in one or more layers and may have any shape.
- the transmissive panel 10 defines an internal radiation propagation channel, in which light beam 50 propagates by internal reflections.
- the propagation channel is defined between the touch surface 20 and bottom surface 25 of the transmissive panel 10, where the touch surface 20 allows the propagating light beam 50 to interact with touching object 60 and thereby defines the touch surface 20.
- the touch-sensitive apparatus 100 may be designed to be overlaid on or integrated into a display device or monitor.
- Figure 3 further illustrates that a portion of the light emitted by emitters 30a is transmitted through transmissive panel 10 in a manner that does not cause the light to TIR within transmissive panel 10. Instead, the light the light exits transmissive panel 10 through touch surface 20 and is reflected by reflector surface 80 of edge reflector 70 to travel along path 90a in a plane parallel with touch surface 20. The light will then continue until deflected by reflector surface 80 of the edge reflector 70 at an opposing edge of the transmissive panel 10, wherein the light will be deflected back down through transmissive panel 10 and onto detectors 30b.
- the feature of the transmitting the light from the emitters 30a to reflector surface 80 via transmissive panel 10 has a number of advantages over the solutions presented by the prior art.
- manufacture of touch-sensitive apparatus 100 becomes significantly less expensive.
- This feature allows an arrangement where nothing is in contact with the edges of the transmissive panel 10, allowing expensive finishing (where the transmissive panel 10 is formed from glass) to regulate the edges of the glass to be avoided.
- Figure 4 shows a top plan view of the embodiment of figure 3.
- light beam 50 travelling through transmissive panel 10 originates from where the light is coupled into the transmissive panel 10 by coupling element 40 at in-coupling point 45.
- Light beam 90 travelling above touch surface 20 originates from reflector surface focal point 80a of reflector surface 80 where the light emitted from emitters 30a and having passed through transmissive panel 10 is reflected across touch surface 20.
- the distance travelled by the (un-collimated) light from emitters 30a to reflector surface focal point 80a is greater than the distance travelled by the light from emitters 30a to in-coupling point 45.
- the spread of light reflected from the reflector surface focal point 80a is broader than the spread of light entering the transmissive panel 10 at in-coupling point 45.
- the resulting effect is equivalent to that of using a wider emitter for emitting the above surface light beam 90 than that of light beam 50, travelling inside the glass.
- a corresponding effect occurs at the detector end, wherein the light arriving at detectors 30b via the above surface route is reflected onto detectors 30b from a broader area than the area of in-coupling point 45, providing the equivalent effect of broader detectors 30b.
- detection lines derived from light beam 90 are broader than detection lines derived from light beam 50.
- Figure 5 and figure 6 show the difference in detection lines 95 derived from the light travelling within the glass and detection lines 96 derived from light travelling above the touch surface.
- detection lines 95 have a width corresponding to the short distance travelled to the in-coupling point 45 from emitters 30a.
- detection lines 96 have a width corresponding to the extra distance travelled to reflector surface focal point 80a from emitters 30a.
- a stylus and a finger may have very large differences in size (or width as viewed from the perspective of a detection line).
- a stylus may typically provide a width of 2mm to 5mm, whereas a finger may provide a width of 5mm to 15mm.
- the size of a decoded touch will depend on the convolution of the detection line and the object. It is preferable to have wider detection lines above the glass, both in order to provide better cover the touch surface 20 and to get a broadened stylus interaction since this may increase the resolution.
- broadening of detection lines will reduce the ability to separate two closely spaced touch objects, potentially a key requirement for multi-touch systems.
- Figure 7 shows a signal profile of a narrow detection line overlaid on a wide detection line.
- Narrow detection lines 95 have a signal profile corresponding to signal profile 150 and wide detection lines 96 have a signal profile corresponding to signal profile 160.
- Wide detection lines 96 with a width larger than 4 mm and possibly up to 20 mm are advantageous, although 4mm-6mm is preferred.
- narrow detection lines 95 designed to resolved multiple touching objects such as fingers, broadening must be kept down to a size less than or comparable to the touching objects.
- the width of narrow detection lines 95 is also usually limited by the width of emitters 30a and detectors 30b.
- Narrow detection lines 95 should be less than 5mm in width. In a preferred embodiment, detection lines 95 are between 2mm and 3mm wide.
- reflector surface 80 is a diffusive reflecting surface.
- reflector surface 80 is a lambertian diffusive reflecting surface preferably providing a scattering of greater than 90%.
- Suitable materials for reflector surface 80 may include Titanium oxide paint or Microcellular foamed reflector MCPET.
- the advantage of using a diffusive reflecting surface is that it makes the optical system less sensitive to production, mounting and load tolerances than a specular reflector or lens. This allows the touch-sensitive apparatus 100 to be cheaper and simpler to produce.
- a diffusive reflector surface 80 also allows broader and overlapping detection lines.
- the amount of light reflected by reflector surface 80 may be controlled by adjusting the size of reflector surface 80.
- a reflector surface 80 having a smaller surface area will reflect a small amount of light.
- paint or spray coatings may be selected to reduce the reflection, and may be applied in a specific pattern to the surface for accurate control of reflectivity.
- the amount of light received at each of detectors 30b via the in-glass route (shown in the figures as light beam 50) is greater than or equal to the amount of light received at each of detectors 30b via the above surface route (shown in the figures as light beam 90).
- the ratio of light received at each of detectors 30b via the in-glass route is ten times greater than the amount of light received at each of detectors 30b via the above surface route. This feature is advantageous as it allows the attenuation of the optical signal resulting from FTIR to be easily compared at the reconstruction phase to the attenuation of the optical signal resulting from occlusion of the above surface light, even though the latter is usually significantly larger than the former.
- reflector surface 80 is configured to reflect a portion of light beam 90 to travel along path 90a and a portion of light beam 90 to travel along path 90b, by reflecting off touch surface 20 and coupling out to the detector. This advantageously results in a larger portion of light beam 90 being detected by detectors 30b. Furthermore, the use of path 90b allows load tolerances of the touch-sensitive apparatus 100 to be improved. A heavy load on touch surface 20 may deform the panel and bring path 90a out of alignment. However, path 90b would likely be less affected by said deformation, allowing sufficient signal to continue to be received by detectors 30b.
- transmissive panel 10 is curved to form a concave surface.
- reflector surface 80 is configured to cause a portion of light beam 90 to reflect a plurality of times off touch surface 20 to follow a path 90c shown in figure 8.
- this feature allows a further enhancement of the signal to noise ratio, even for a curved panel.
- edge reflector 70 is set further back from the periphery of touch surface 20 than in the previous embodiments.
- the positioning of the edge reflector 70 further back from the periphery of touch surface 20 provides a longer distance from emitters 30a to reflector surface 80, allowing the above surface detection lines to be broader.
- the extra distance that the edge reflector 70 is set back provides larger overlap between wide detection lines 96 in the peripheral regions of touch surface 20 resulting in improved accuracy in areas. This is especially advantageous where narrow detection lines 95 provide limited coverage.
- the edge reflector 70 is positioned so that reflector surface 80 is set 10 mm back from in-coupling point 45.
- Figure 10 shows an embodiment of the invention featuring dust shield 1 10.
- a known problem with above-surface touch systems is the accumulation of dust and contamination around the sensor area or the area in which the light signal is emitted to travel across the touch panel. Dust or other
- a solution presented in figure 10 is that of a dust shield 1 10 forming a physical barrier preventing the dust from reaching reflector surface 80 and comprising transparent window 115 through which the light signal may pass unhindered.
- dust shield 110 forms a sloping edge, sloping from the inside edge in contact with touch surface 20 outwardly to the top surface of edge reflector 70. This allows dust shield 1 10 to be effectively wiped clean.
- transparent window 1 15 comprises a material of coating configured to allow only IR or Near-IR light to pass through. This feature provides improved ambient light noise reduction as light from artificial lighting or sun light is filtered before reaching detectors 30b.
- dust shield 1 10 is configured with a longer dimension extending from edge reflector 70 towards touch surface 20 and with an internal top surface providing a light baffle effect so as to provide an angular filter for light entering through transparent window 1 15. This is advantageous for reducing ambient noise as light entering at the wrong angle is absorbed into the roof of the dust shield 110. Furthermore, when combined with the embodiment from figure 8, the angle of light paths travelling above the panel may be limited so that that detection lines very high above the glass 90a may be supressed.
- FIG 11 shows an alternative embodiment to the embodiment shown in figure 3.
- apparatus 100 is configured to transmit light from a first set of emitters 31 a to a first set of detectors 31 b inside a transmissive panel 10 so as to illuminate a touch surface 20 from within the transmissive panel 10.
- Apparatus 100 is also configured to transmit light from a second set of emitters 32a to a second set of detectors 32b such that the light is emitted by emitters 32a, exits transmissive panel 10 through touch surface 20 and is reflected by reflector surface 80 of edge reflector 70 to travel along path 90a in a plane parallel with touch surface 20.
- a significant problem with trying to differentiate between the attenuation of the light travelling along a path above the touch surface from the attenuation of light travelling along a path within the panel via FTIR is that a typical finger touch is likely to produce an attenuation of the light above the panel is greater than the attenuation of the light travelling within the panel via FTIR by as much as a factor of 50. This results in an attenuation signal of the light travelling in the panel which is difficult to differentiate from noise relative to the attenuation signal of the light travelling above the panel. For objects such as stylus tips, this relative difference in signal strength can be even greater. Therefore, the use of separate emitting and detecting systems for light paths above
- FTIR FTIR system
- the touch output of the FTIR system may be compared to the touch output of the above-surface system to identify touches of the FTIR system which do not appear in the touch output of the above-surface system. This would indicate that the identified touches do not correspond to actual objects above the touch surface but mere contamination on the surface. The output of the identified touches can then be suppressed.
- the output of the above-surface system may be used to identify touches of the FTIR system where the touching object has now been removed. The output of the identified touches can then be suppressed.
- portions of the touch surface may become significantly shielded from the light paths of the above-surface system, resulting in little or no touch signal in the shielded portion.
- the FTIR may continue to provide a touch signal within the occluded areas, as the attenuation of the FTIR light paths resulting from a touch is relatively small and non-occluding.
- a first wavelength of light emitted by first set of emitters 31 a and detected by first set of detectors 31 b may be different to a second wavelength of light emitted by second set of emitters 32a and detected by second set of detectors 32b.
- This may also allow improved ambient light noise reduction in environments where ambient light comprises more light with a first wavelength than light with a second wavelength or vice versa.
- the first and second wavelengths are both near IR wavelengths.
- emitters of the first and second set of emitters may be chosen to ensure that activation of the emitters of the first set of emitters does not chronologically overlap with activation of emitters of the second set of emitters. This allows potential co-interference to be minimized.
- Figure 12 shows a top plan view of the Figure 1 1.
- emitters 31 a are spatially interlaced with emitters 32a around the peripheral edge of transmissive panel 10 so that emitters of first set 31 a are positioned between adjacent emitters of second set 32a.
- detectors 31 b are spatially interlaced with detectors 32b around the peripheral edge of transmissive panel 10 so that detectors of first set 31 b are positioned between adjacent emitters of second set 32b.
- emitters 31 a and detectors 31 b are only positioned along sub-portions of the periphery of the touch surface. In this
- the portion of the periphery of the touch surface along which emitters 31 a and detectors 31 b are positioned is smaller than the portion of the periphery of the touch surface along which emitters 31 a and detectors 31 b are positioned.
- emitters 31 a and detectors 31 b are only located along two opposing edges of a rectangular touch surface.
- emitters 31 a are placed along one edge of the rectangular touch surface and detectors 31 b are positioned along an opposing edge of the touch surface.
- emitters 31a and detectors 31 b may be positioned along L-shaped portions of the periphery of the rectangular touch surface at the corners.
- the number of emitters 31a and detectors 31 b are fewer than the number of emitters 32a and detectors 32b respectively. This may result in an FTIR system with a lower resolution than the above-surface system.
- emitters 31 a and detectors 31 b may be swapped for emitters 32a and detectors 32b so that the FTIR system has a higher resolution and/or coverage than the above-surface system.
- a limited FTIR type system configured to detect pressure (as is known in the art) may be added to the above-surface system with only as many emitters and detectors needed to accurately detect pressure.
- the limited system comprises only 25% of the number of emitters and detectors of the complete system.
- a low-power mode is provided wherein only the
- above-surface system is powered.
- a full-power mode is activated and power is provided to the FTIR system.
- This has the advantage of preserving energy during periods that the above-surface system detects no touches whilst enabling the features of the FTIR system once it is required.
- an embodiment is provided wherein only the FTIR system is powered in a low-power mode and the above-surface system is only powered on when required. This may include a system wherein the above-surface system is only activated periodically or in response to a determination that a touch detected by the FTIR system is possibly a false touch caused by
- Figure 13 shows a variation of figure 1 1 wherein emitters 31 a are configured to simultaneously project light above and into transmissive panel 10 but wherein separate detectors 31 b and 32b are used to provide separate above-surface and FTIR type touch signals. This advantageously allows simultaneous emission of both signals using a single emitter, allowing low energy consumption and cheaper manufacturing costs, whilst the above features.
- Figure 14 shows an alternative to figure 13 wherein the detectors 31 b are configured to simultaneously receive light from above and from within transmissive panel 10 but wherein separate emitters 31 a and 32a are used to provide separate above-surface and FTIR type touch signals.
- This configuration advantageously allows separate control of the light intensity of the light emitted from emitters 31 a and 32a to account for environmental light noise or other situations in which light levels need to be separately altered, whilst also allowing low energy consumption and cheaper manufacturing costs.
- Configurations to convey light from emitters 32a to a plane parallel with touch surface 20 and back to detectors 32b may be employed according to techniques known in the prior art. E.g. Configurations for conveying the light around the edge of the panel rather than through it.
Abstract
An embodiment of the invention provides a touch sensing apparatus, comprising: a light transmissive element (10) that defines a touch surface; a set of emitters (30a) arranged around the periphery of the touch surface to emit beams of light into the light transmissive element, wherein a first portion of the beams (50) of light propagate inside the light transmissive element while illuminating the touch surface such that an object touching the touch surface causes an attenuation of the propagating light, and wherein a second portion of the beams (90) of light pass out of the light transmissive element and are reflected to travel above the touch surface, a set of light detectors (30b) arranged around the periphery of the touch surface to receive light from the set of emitters from the transmissive element and from above the touch surface, wherein each light detector is arranged to receive light from more than one emitter.
Description
Optical touch system comprising means for projecting and detecting light beams above and inside a transmissive panel
Technical Field
[0001] The present invention generally relates to improved touch determination on
touch surfaces of optical touch-sensing systems, and in particular in relation to FTIR-based (frustrated total internal reflection) touch systems.
Background Art
[0002] In one category of touch-sensitive panels known as 'above surface optical
touch systems' and known from e.g. US4459476, a plurality of optical emitters and optical receivers are arranged around the periphery of a touch surface to create a grid of intersecting light paths above the touch surface.
Each light path extends between a respective emitter/receiver pair. An object that touches the touch surface will block certain ones of the light paths. Based on the identity of the receivers detecting a blocked light path, a processor can determine the location of the intercept between the blocked light paths. This type of system is only capable of detecting the location of one object (single-touch detection). Further, the required number of emitters and receivers, and thus cost and complexity, increases rapidly with
increasing surface area and/or spatial resolution of the touch panel.
[0003] In a variant, e.g. shown in WO2006/095320, each optical emitter emits a
beam of light that diverges across the touch surface, and each beam is detected by more than one optical receiver positioned around the periphery of the touch surface. Thus, each emitter creates more than one light path across the touch surface. A large number of light paths are created by sequentially activating different emitters around the periphery of the touch surface, and detecting the light received from each emitter by a plurality of optical receivers. Thereby, it is possible to reduce the number of emitters and receivers for a given surface area or spatial resolution, or to enable simultaneous location detection of more than one touching object
(multi-touch detection).
[0004] If the display screen is contaminated by e.g. fingerprints, the optical
transmission path may become unintentionally interrupted and the
information retrieved from the system erroneous or incomplete as the
contaminated surface becomes insensitive to touches. If contaminants are collected in front of one of the emitters or detectors there will always be blocked or occluded light paths.
[0005] Another category of touch-sensitive panels known as 'in-glass optical
systems' is now described and is also known from e.g. US8581884.
[0006] Figure 1 illustrates an example of a touch-sensitive apparatus 100 that is
based on the concept of FTIR (Frustrated Total Internal Reflection), also denoted "FTIR system". The apparatus operates by transmitting light inside a transmissive panel 10, from light emitters 30a to light sensors or detectors
30b, so as to illuminate a touch surface 20 from within the transmissive panel 10. The transmissive panel 10 is made of solid material in one or more layers and may have any shape. The transmissive panel 10 defines an internal radiation propagation channel, in which light propagates by internal reflections.
[0007] In the example of figure 1 , the propagation channel is defined between the touch surface 20 and bottom surface 25 of the transmissive panel 10, where the touch surface 20 allows the propagating light to interact with touching object 60 and thereby defines the touch surface 20. This is achieved by injecting the light into the transmissive panel 10 via coupling element 40 such that the light is reflected by total internal reflection (TIR) in the touch surface 20 as it propagates through the transmissive panel 10. The light may be reflected by TIR on the bottom surface 25 or against a reflective coating thereon. Upon reaching coupling element 40 on a far side of the panel, the light is coupled out of transmissive panel 10 and onto detectors 30b. The touch-sensitive apparatus 100 may be designed to be overlaid on or integrated into a display device or monitor.
[0008] US8553014 describes an attempt to combine the above surface and
in-glass optical systems described above. US8553014 describes an optical coupling technique for introducing light into a transmissive panel and above a transmissive panel simultaneously. However, the in-coupling component shown in figure 126 of US8553014 is a complex prism and appears to rely on total internal reflection and diffraction to couple the light above the touch surface. Such an arrangement would be highly tolerance sensitive, making the optical signal highly sensitive to, for example, the load on the touch surface, the tolerances of process used to mount the prism to the transmissive panel, and the manufacturing of both the transmissive panel and the prism. Furthermore, the spread of the light in a plane parallel to the transmissive panel is limited to a range of less than 80 degrees as light outside this range will be diffracted up and away from the panel. Such a system is best suited to a rectangular grid of detection lines, such as described in US4459476 above. Furthermore, a complex prism as described in US8553014 would be both expensive to manufacture and bulky, taking up valuable space underneath and to the side of the transmissive panel.
Summary of invention
[0009] It is an objective of the invention to at least partly overcome one or more of the above-identified limitations of the prior art.
[0010] One or more of these objectives, as well as further objectives that may appear from the description below, are at least partly achieved by means of a method for data processing, a computer readable medium, devices for data processing, and a touch-sensing apparatus according to the
independent claims, embodiments thereof being defined by the dependent claims.
[001 1] An embodiment of the invention provides a touch sensing apparatus,
comprising: a light transmissive element that defines a touch surface; a set of emitters arranged around the periphery of the touch surface to emit beams of light into the light transmissive element, wherein a first portion of the beams of light propagate inside the light transmissive element while illuminating the touch surface such that an object touching the touch surface causes an attenuation of the propagating light, and wherein a second portion of the beams of light pass out of the light transmissive element and are reflected to travel above the touch surface, a set of light detectors arranged around the periphery of the touch surface to receive light from the set of emitters from the transmissive element and from above the touch surface, wherein each light detector is arranged to receive light from more than one emitter; a processing element configured to determine, based on output signals of the light detectors, a light energy value for each light path; to generate a transmission value for each light path based on the light energy value; and to operate an image reconstruction algorithm on at least part of the thus-generated transmission values so as to determine the position of the object on the touch surface.
Brief description of drawings
[0012] Embodiments of the invention will now be described in more detail with reference to the accompanying schematic drawings.
[0013] Figure 1 shows a cross section of an FTIR-based touch-sensitive apparatus according to the prior art.
[0014] Figure 2 is a top plan view of an FTIR-based touch-sensitive apparatus.
[0015] Figure 3 shows a section view of an extended FTI R touch system according to an embodiment of the present invention.
[0016] Figure 4 shows a top plan view of an extended FTIR touch system
according to an embodiment of the present invention.
[0017] Figure 5 shows the narrow detection lines within transmissive panel 10.
[0018] Figure 6 shows the broad detection lines above transmissive panel 10.
[0019] Figure 7 shows the signal profile of detection lines 95 and detection lines 96.
[0020] Figure 8 shows an embodiment of the present invention in which the touch surface is curved.
[0021] Figure 9 shows an embodiment of the present invention with deflectors set back from the edge of the active area.
[0022] Figure 10 shows an embodiment of the present invention having a dust shield.
[0023] Figure 11 shows an embodiment of the present invention having a first set of emitters and detectors for projecting light above transmissive panel 10
and a second set of emitters and detectors for projecting light into transmissive panel 10.
[0024] Figure 12 shows a top plan view of the Figure 1 1.
[0025] Figure 13 shows a variation of figure 11 wherein the emitters are configured to simultaneously project light above and into transmissive panel 10.
[0026] Figure 14 shows a variation of figure 1 1 wherein the detectors are
configured to simultaneously receive light from above and from within transmissive panel 10.
Description of embodiments
[0027] Before describing embodiments of the invention, a few definitions will be given.
[0028] A "touch object" or "touching object" is a physical object that touches, or is brought in sufficient proximity to, a touch surface so as to be detected by one or more sensors in the touch system. The physical object may be animate or inanimate.
[0029] An "interaction" occurs when the touch object affects a parameter
measured by the sensor.
[0030] A "touch" denotes a point of interaction as seen in the interaction pattern.
[0031] Throughout the following description, the same reference numerals are used to identify corresponding elements.
Main Embodiment
[0032] Figure 2 illustrates a top plan view of figure 1 in an example of a
touch-sensitive apparatus 100 that is based on the concept of FTIR.
Emitters 30a are distributed around the periphery of touch surface 20, to project light into the transmissive panel 10 such that at least part of the light is captured inside the transmissive panel 10 for propagation by internal reflection in the propagation channel. Detectors 30b are distributed around the periphery of touch surface 20, to receive part of the propagating light. The light from each of emitters 30a will thereby propagate inside the transmissive panel 10 to a number of different detectors 30b on a plurality of light paths D.
[0033] Even if the light paths D correspond to light that propagates by internal reflections inside the panel 1 , the light paths D may conceptually be represented as "detection lines" that extend across the touch surface 20 to the periphery of touch surface 20 between pairs of emitters 30a and detectors 30b, as shown in figure 2. Thus, the detection lines D correspond to a projection of the light paths D onto the touch surface 20. Thereby, the emitters 30a and detectors 30b collectively define a grid of detection lines D ("detection grid") on the touch surface 20, as seen in a top plan view. The spacing of intersections in the detection grid defines the spatial resolution of the touch-sensitive apparatus 100, i.e. the smallest object that can be detected on the touch surface 20. The width of the detection line is a
function of the width of the emitters and corresponding detectors. A wide detector detecting light from a wide emitter provides a wide detection line with a broader surface coverage, minimising the space in between detection lines which provide no touch coverage. A disadvantage of broad detection lines may be the reduced touch precision and lower signal to noise ratio.
[0034] As used herein, the emitters 30a may be any type of device capable of emitting radiation in a desired wavelength range, for example a diode laser, a VCSEL (vertical-cavity surface-emitting laser), an LED (light-emitting diode), an incandescent lamp, a halogen lamp, etc. The emitters 30a may also be formed by the end of an optical fiber. The emitters 30a may generate light in any wavelength range. The following examples presume that the light is generated in the infrared (IR), i.e. at wavelengths above about 750 nm. Analogously, the detectors 30b may be any device capable of converting light (in the same wavelength range) into an electrical signal, such as a photo-detector, a CCD device, a CMOS device, etc.
[0035] The detectors 30b collectively provide an output signal, which is received and sampled by a signal processor 130. The output signal contains a number of sub-signals, also denoted "projection signals", each representing the energy of light received by one of light detectors 30b from one of light emitters 30a. Depending on implementation, the signal processor 130 may need to process the output signal for separation of the individual projection signals. The projection signals represent the received energy, intensity or power of light received by the detectors 30b on the individual detection lines D. Whenever an object touches a detection line D, the received energy on this detection line is decreased or "attenuated".
[0036] The signal processor 130 may be configured to process the projection
signals so as to determine a property of the touching objects, such as a position (e.g. in a x,y coordinate system), a shape, or an area. This determination may involve a straight-forward triangulation based on the attenuated detection lines, e.g. as disclosed in US7432893 and
WO2010/015408, or a more advanced processing to recreate a distribution of attenuation values (for simplicity, referred to as an "attenuation pattern") across the touch surface 20, where each attenuation value represents a local degree of light attenuation. The attenuation pattern may be further processed by the signal processor 130 or by a separate device (not shown) for determination of a position, shape or area of touching objects. The attenuation pattern may be generated e.g. by any available algorithm for image reconstruction based on projection signal values, including tomographic reconstruction methods such as Filtered Back Projection, FFT-based algorithms, ART (Algebraic Reconstruction Technique), SART (Simultaneous Algebraic Reconstruction Technique), etc. Alternatively, the attenuation pattern may be generated by adapting one or more basis functions and/or by statistical methods such as Bayesian inversion.
Examples of such reconstruction functions designed for use in touch determination are found in WO2009/077962, WO201 1/04951 1 ,
WO201 1/139213, WO2012/050510, and WO2013/062471 , all of which are incorporated herein by reference.
[0037] In the illustrated example, the apparatus 100 also includes a controller 120 which is connected to selectively control the activation of the emitters 30a and, possibly, the readout of data from the detectors 30b. Depending on implementation, the emitters 30a and/or detectors 30b may be activated in sequence or concurrently, e.g. as disclosed in US8581884. The signal processor 130 and the controller 120 may be configured as separate units, or they may be incorporated in a single unit. One or both of the signal processor 130 and the controller 120 may be at least partially implemented by software executed by a processing unit 140.
[0038] Figure 3 illustrates an embodiment of the invention extending the FTIR system of figure 1 to include touch detection lines above touch surface 20.
[0039] As with figure 1 , figure 3 shows an embodiment of the invention in which light travels inside a transmissive panel 10, from light emitters 30a to detectors 30b, so as to illuminate a touch surface 20 from within the transmissive panel 10. The transmissive panel 10 is made of solid material in one or more layers and may have any shape. The transmissive panel 10 defines an internal radiation propagation channel, in which light beam 50 propagates by internal reflections. In figure 3, the propagation channel is defined between the touch surface 20 and bottom surface 25 of the transmissive panel 10, where the touch surface 20 allows the propagating light beam 50 to interact with touching object 60 and thereby defines the touch surface 20. This is achieved by injecting the light into the transmissive panel 10 via coupling element 40 such that the light is reflected by total internal reflection (TIR) in the touch surface 20 as it propagates through the transmissive panel 10. The light beam 50 may be reflected by TIR on the bottom surface 25 or against a reflective coating thereon. Upon reaching coupling element 40 on a far side of the panel, the light is coupled out of transmissive panel 10 and onto detectors 30b. The touch-sensitive apparatus 100 may be designed to be overlaid on or integrated into a display device or monitor.
[0040] Figure 3 further illustrates that a portion of the light emitted by emitters 30a is transmitted through transmissive panel 10 in a manner that does not cause the light to TIR within transmissive panel 10. Instead, the light the light exits transmissive panel 10 through touch surface 20 and is reflected by reflector surface 80 of edge reflector 70 to travel along path 90a in a plane parallel with touch surface 20. The light will then continue until deflected by reflector surface 80 of the edge reflector 70 at an opposing edge of the transmissive panel 10, wherein the light will be deflected back down through transmissive panel 10 and onto detectors 30b. The feature of
the transmitting the light from the emitters 30a to reflector surface 80 via transmissive panel 10 has a number of advantages over the solutions presented by the prior art. In particular, manufacture of touch-sensitive apparatus 100 becomes significantly less expensive. This feature allows an arrangement where nothing is in contact with the edges of the transmissive panel 10, allowing expensive finishing (where the transmissive panel 10 is formed from glass) to regulate the edges of the glass to be avoided.
Furthermore, fastening of the components to the transmissive panel 10 is simplified and optical tolerances are improved.
[0041 ] Figure 4 shows a top plan view of the embodiment of figure 3. As viewed from above, light beam 50 travelling through transmissive panel 10 originates from where the light is coupled into the transmissive panel 10 by coupling element 40 at in-coupling point 45. Light beam 90 travelling above touch surface 20 (along path 90a, path 90b) originates from reflector surface focal point 80a of reflector surface 80 where the light emitted from emitters 30a and having passed through transmissive panel 10 is reflected across touch surface 20. The distance travelled by the (un-collimated) light from emitters 30a to reflector surface focal point 80a is greater than the distance travelled by the light from emitters 30a to in-coupling point 45. Consequently, the spread of light reflected from the reflector surface focal point 80a is broader than the spread of light entering the transmissive panel 10 at in-coupling point 45. The resulting effect is equivalent to that of using a wider emitter for emitting the above surface light beam 90 than that of light beam 50, travelling inside the glass. A corresponding effect occurs at the detector end, wherein the light arriving at detectors 30b via the above surface route is reflected onto detectors 30b from a broader area than the area of in-coupling point 45, providing the equivalent effect of broader detectors 30b.
[0042] The result is that detection lines derived from light beam 90 are broader than detection lines derived from light beam 50. Figure 5 and figure 6 show the difference in detection lines 95 derived from the light travelling within the glass and detection lines 96 derived from light travelling above the touch surface. In figure 5, detection lines 95 have a width corresponding to the short distance travelled to the in-coupling point 45 from emitters 30a. In figure 6, detection lines 96 have a width corresponding to the extra distance travelled to reflector surface focal point 80a from emitters 30a.
[0043] A stylus and a finger may have very large differences in size (or width as viewed from the perspective of a detection line). A stylus may typically provide a width of 2mm to 5mm, whereas a finger may provide a width of 5mm to 15mm. However, the size of a decoded touch will depend on the convolution of the detection line and the object. It is preferable to have wider detection lines above the glass, both in order to provide better cover the touch surface 20 and to get a broadened stylus interaction since this may
increase the resolution. However, broadening of detection lines will reduce the ability to separate two closely spaced touch objects, potentially a key requirement for multi-touch systems.
[0044] Therefore, a solution with different detection line widths above and within the glass is required. Figure 7 shows a signal profile of a narrow detection line overlaid on a wide detection line. Narrow detection lines 95 have a signal profile corresponding to signal profile 150 and wide detection lines 96 have a signal profile corresponding to signal profile 160.
[0045] Since a stylus will usually be used as a single touch object, broader
detection lines are possible. Wide detection lines 96 with a width larger than 4 mm and possibly up to 20 mm are advantageous, although 4mm-6mm is preferred.
[0046] For narrow detection lines 95 designed to resolved multiple touching objects such as fingers, broadening must be kept down to a size less than or comparable to the touching objects. The width of narrow detection lines 95 is also usually limited by the width of emitters 30a and detectors 30b.
Narrow detection lines 95 should be less than 5mm in width. In a preferred embodiment, detection lines 95 are between 2mm and 3mm wide.
[0047] In one embodiment, reflector surface 80 is a diffusive reflecting surface. In a preferred embodiment, reflector surface 80 is a lambertian diffusive reflecting surface preferably providing a scattering of greater than 90%. Suitable materials for reflector surface 80 may include Titanium oxide paint or Microcellular foamed reflector MCPET. The advantage of using a diffusive reflecting surface is that it makes the optical system less sensitive to production, mounting and load tolerances than a specular reflector or lens. This allows the touch-sensitive apparatus 100 to be cheaper and simpler to produce. Furthermore, a diffusive reflector surface 80 also allows broader and overlapping detection lines.
[0048] The amount of light reflected by reflector surface 80 may be controlled by adjusting the size of reflector surface 80. A reflector surface 80 having a smaller surface area will reflect a small amount of light. Alternatively, paint or spray coatings may be selected to reduce the reflection, and may be applied in a specific pattern to the surface for accurate control of reflectivity.
[0049] In one embodiment, the amount of light received at each of detectors 30b via the in-glass route (shown in the figures as light beam 50) is greater than or equal to the amount of light received at each of detectors 30b via the above surface route (shown in the figures as light beam 90). In a preferred embodiment, the ratio of light received at each of detectors 30b via the in-glass route is ten times greater than the amount of light received at each of detectors 30b via the above surface route. This feature is advantageous as it allows the attenuation of the optical signal resulting from FTIR to be easily compared at the reconstruction phase to the attenuation of the optical
signal resulting from occlusion of the above surface light, even though the latter is usually significantly larger than the former.
[0050] In the embodiment shown in figure 3, reflector surface 80 is configured to reflect a portion of light beam 90 to travel along path 90a and a portion of light beam 90 to travel along path 90b, by reflecting off touch surface 20 and coupling out to the detector. This advantageously results in a larger portion of light beam 90 being detected by detectors 30b. Furthermore, the use of path 90b allows load tolerances of the touch-sensitive apparatus 100 to be improved. A heavy load on touch surface 20 may deform the panel and bring path 90a out of alignment. However, path 90b would likely be less affected by said deformation, allowing sufficient signal to continue to be received by detectors 30b.
[0051] In an embodiment of the invention shown in figure 8, transmissive panel 10 is curved to form a concave surface. In this embodiment, reflector surface 80 is configured to cause a portion of light beam 90 to reflect a plurality of times off touch surface 20 to follow a path 90c shown in figure 8. Similarly to the above embodiment, this feature allows a further enhancement of the signal to noise ratio, even for a curved panel.
[0052] In an embodiment of the invention shown in figure 9, edge reflector 70 is set further back from the periphery of touch surface 20 than in the previous embodiments. The positioning of the edge reflector 70 further back from the periphery of touch surface 20 provides a longer distance from emitters 30a to reflector surface 80, allowing the above surface detection lines to be broader. Furthermore, the extra distance that the edge reflector 70 is set back provides larger overlap between wide detection lines 96 in the peripheral regions of touch surface 20 resulting in improved accuracy in areas. This is especially advantageous where narrow detection lines 95 provide limited coverage. In a preferred embodiment, the edge reflector 70 is positioned so that reflector surface 80 is set 10 mm back from in-coupling point 45.
[0053] Figure 10 shows an embodiment of the invention featuring dust shield 1 10.
A known problem with above-surface touch systems is the accumulation of dust and contamination around the sensor area or the area in which the light signal is emitted to travel across the touch panel. Dust or other
contamination accumulating at this point will block the light signal and seriously degrade the ability of the touch system to determine a touch. For a system such as the embodiment presented in figure 3, the accumulation of contamination may be increased where reflector surface 80 is angled to form an overhang. This overhang forms a natural shelter for accumulating contamination, resulting in further touch signal degradation. A solution presented in figure 10 is that of a dust shield 1 10 forming a physical barrier preventing the dust from reaching reflector surface 80 and comprising transparent window 115 through which the light signal may pass
unhindered. Preferably, dust shield 110 forms a sloping edge, sloping from the inside edge in contact with touch surface 20 outwardly to the top surface of edge reflector 70. This allows dust shield 1 10 to be effectively wiped clean.
[0054] In a preferred embodiment, transparent window 1 15 comprises a material of coating configured to allow only IR or Near-IR light to pass through. This feature provides improved ambient light noise reduction as light from artificial lighting or sun light is filtered before reaching detectors 30b.
[0055] In a preferred embodiment, dust shield 1 10 is configured with a longer dimension extending from edge reflector 70 towards touch surface 20 and with an internal top surface providing a light baffle effect so as to provide an angular filter for light entering through transparent window 1 15. This is advantageous for reducing ambient noise as light entering at the wrong angle is absorbed into the roof of the dust shield 110. Furthermore, when combined with the embodiment from figure 8, the angle of light paths travelling above the panel may be limited so that that detection lines very high above the glass 90a may be supressed.
[0056] Figure 11 shows an alternative embodiment to the embodiment shown in figure 3. In figure 1 1 , apparatus 100 is configured to transmit light from a first set of emitters 31 a to a first set of detectors 31 b inside a transmissive panel 10 so as to illuminate a touch surface 20 from within the transmissive panel 10. Apparatus 100 is also configured to transmit light from a second set of emitters 32a to a second set of detectors 32b such that the light is emitted by emitters 32a, exits transmissive panel 10 through touch surface 20 and is reflected by reflector surface 80 of edge reflector 70 to travel along path 90a in a plane parallel with touch surface 20. The light will then continue until deflected by reflector surface 80 of the edge reflector 70 at an opposing edge of the transmissive panel 10, wherein the light will be deflected back down through transmissive panel 10 and onto detectors 32b. Significant advantages may be obtained from using two separate emitting and detecting systems rather than a single set of emitters and detectors for both the above-surface and FTIR light paths. A significant problem with trying to differentiate between the attenuation of the light travelling along a path above the touch surface from the attenuation of light travelling along a path within the panel via FTIR is that a typical finger touch is likely to produce an attenuation of the light above the panel is greater than the attenuation of the light travelling within the panel via FTIR by as much as a factor of 50. This results in an attenuation signal of the light travelling in the panel which is difficult to differentiate from noise relative to the attenuation signal of the light travelling above the panel. For objects such as stylus tips, this relative difference in signal strength can be even greater. Therefore, the use of separate emitting and detecting systems for light paths above
(above-surface system) and within the panel via FTIR (FTIR system) allows
each system to be configured appropriately for the respective signal-to-noise ratios. The separate resulting signals can then be combined to provide a system that provides the following features:
[0057] - Oil or water contamination on the touch surface may appear to the FTIR system as an attenuation surface area and generate a false touch.
However, in the above embodiment, the touch output of the FTIR system may be compared to the touch output of the above-surface system to identify touches of the FTIR system which do not appear in the touch output of the above-surface system. This would indicate that the identified touches do not correspond to actual objects above the touch surface but mere contamination on the surface. The output of the identified touches can then be suppressed.
[0058] - Similarly to the above, when a user raises their finger from the touch surface, a previously identified touch should be removed from the touch output. However, on occasion, finger grease from the skin is left on the touch surface and an FTIR system continues to detect and report a touch. In the above embodiment, the output of the above-surface system may be used to identify touches of the FTIR system where the touching object has now been removed. The output of the identified touches can then be suppressed.
[0059] - Certain object types produce very little attenuation of the FTIR light when in contact with the touch surface e.g. Hard objects such as stylus tips. Where the above-surface system registers an object but the FTIR system does not, it can be determined that the object is likely to be a 'hard object' as opposed to a normal touch from a finger. Differentiation between hard and soft surfaced objects may allow differentiation between e.g. a pen and a finger. A touch system configured to differentiate between a stylus and a finger tip may generate a different Ul output in dependence on the identified object touching the touch surface.
[0060] - One problem with above-surface systems is that the object touching the touch surface may completely occlude one or more light paths of the above-surface system. Where a large number of touches are
simultaneously applied to the touch surface, portions of the touch surface may become significantly shielded from the light paths of the above-surface system, resulting in little or no touch signal in the shielded portion. In the above embodiment, the FTIR may continue to provide a touch signal within the occluded areas, as the attenuation of the FTIR light paths resulting from a touch is relatively small and non-occluding.
[0061] In the embodiment of figure 11 , a first wavelength of light emitted by first set of emitters 31 a and detected by first set of detectors 31 b may be different to a second wavelength of light emitted by second set of emitters 32a and detected by second set of detectors 32b. This allows light to be emitted from one of the first set of emitters 31a and one of the second set of emitters 32a
simultaneously and detected by the first set of detectors 31 b and second set of detectors 32b without co-interference. This may also allow improved ambient light noise reduction in environments where ambient light comprises more light with a first wavelength than light with a second wavelength or vice versa. E.g. Wherein the first and second wavelengths are both near IR wavelengths.
[0062] In the embodiment of figure 11 , the timing sequence used to activate
emitters of the first and second set of emitters may be chosen to ensure that activation of the emitters of the first set of emitters does not chronologically overlap with activation of emitters of the second set of emitters. This allows potential co-interference to be minimized.
[0063] Figure 12 shows a top plan view of the Figure 1 1. In this embodiment, emitters 31 a are spatially interlaced with emitters 32a around the peripheral edge of transmissive panel 10 so that emitters of first set 31 a are positioned between adjacent emitters of second set 32a. Similarly, detectors 31 b are spatially interlaced with detectors 32b around the peripheral edge of transmissive panel 10 so that detectors of first set 31 b are positioned between adjacent emitters of second set 32b. This has the advantage of improving coverage of the touch surface where detection paths of the above-surface system cover gaps between detection paths of the FTIR system and vice versa.
[0064] In one embodiment, emitters 31 a and detectors 31 b are only positioned along sub-portions of the periphery of the touch surface. In this
embodiment, the portion of the periphery of the touch surface along which emitters 31 a and detectors 31 b are positioned is smaller than the portion of the periphery of the touch surface along which emitters 31 a and detectors 31 b are positioned. In one example, emitters 31 a and detectors 31 b are only located along two opposing edges of a rectangular touch surface. In an alternative embodiment, emitters 31 a are placed along one edge of the rectangular touch surface and detectors 31 b are positioned along an opposing edge of the touch surface. Alternatively, emitters 31a and detectors 31 b may be positioned along L-shaped portions of the periphery of the rectangular touch surface at the corners. In one embodiment, the number of emitters 31a and detectors 31 b are fewer than the number of emitters 32a and detectors 32b respectively. This may result in an FTIR system with a lower resolution than the above-surface system. Alternatively, for all of the above arrangements, emitters 31 a and detectors 31 b may be swapped for emitters 32a and detectors 32b so that the FTIR system has a higher resolution and/or coverage than the above-surface system. These arrangements allow the advantages of a complete above-surface system or FTIR system to be supplemented with the advantages of a limited FTIR system or limited above-surface system respectively without the need for a complete version of both systems. This would allow a significant reduction
in manufacturing cost, power usage, and even physical size of the touch frame. E.g. Where high accuracy pressure detection needed to be added to an above-surface system, a limited FTIR type system configured to detect pressure (as is known in the art) may be added to the above-surface system with only as many emitters and detectors needed to accurately detect pressure. In one example, the limited system comprises only 25% of the number of emitters and detectors of the complete system.
[0065] In one embodiment, a low-power mode is provided wherein only the
above-surface system is powered. When a touch is detected by the above-surface system, a full-power mode is activated and power is provided to the FTIR system. This has the advantage of preserving energy during periods that the above-surface system detects no touches whilst enabling the features of the FTIR system once it is required. Alternatively, an embodiment is provided wherein only the FTIR system is powered in a low-power mode and the above-surface system is only powered on when required. This may include a system wherein the above-surface system is only activated periodically or in response to a determination that a touch detected by the FTIR system is possibly a false touch caused by
contamination.
[0066] Figure 13 shows a variation of figure 1 1 wherein emitters 31 a are configured to simultaneously project light above and into transmissive panel 10 but wherein separate detectors 31 b and 32b are used to provide separate above-surface and FTIR type touch signals. This advantageously allows simultaneous emission of both signals using a single emitter, allowing low energy consumption and cheaper manufacturing costs, whilst the above features.
[0067] Figure 14 shows an alternative to figure 13 wherein the detectors 31 b are configured to simultaneously receive light from above and from within transmissive panel 10 but wherein separate emitters 31 a and 32a are used to provide separate above-surface and FTIR type touch signals. This configuration advantageously allows separate control of the light intensity of the light emitted from emitters 31 a and 32a to account for environmental light noise or other situations in which light levels need to be separately altered, whilst also allowing low energy consumption and cheaper manufacturing costs.
[0068] For all of the above embodiments, alternative in-coupling and out-coupling solutions used for coupling the light into and out of transmissive panel 10 may be employed according to techniques known in the prior art. E.g. Coupling the light into the edge of the panel rather than from below.
[0069] Furthermore, alternative waveguide, lens, and reflective surface
configurations to convey light from emitters 32a to a plane parallel with touch surface 20 and back to detectors 32b may be employed according to
techniques known in the prior art. E.g. Configurations for conveying the light around the edge of the panel rather than through it.
Reference signs list
A. touch-sensitive apparatus 100
B. transmissive panel 10
C. touch surface 20
D. bottom surface 25
E. emitters 30a
F. detectors 30b
G. coupling element 40
H. in-coupling point 45
1. light beam 50
J. touching object 60
K. edge reflector 70
L. reflector surface 80
M. reflector surface focal point 80a
N. light beam 90
O. path 90a
P. path 90b
Q. path 90c
R. detection lines 95
S. detection lines 96
T. dust shield 110
U. transparent window 115
V. light paths D
W. controller 120
X. signal processor 130
Y. processing unit 140
Z. signal profile 150
AA. signal profile 160
Claims
1. A touch sensing apparatus, comprising:
a light transmissive element that defines a touch surface;
a first set of emitters arranged around a first portion of the periphery of the touch surface to emit first beams of light into the light transmissive element, wherein the first beams of light propagate inside the light transmissive element while illuminating the touch surface,
a second set of emitters arranged around a second portion of the periphery of the touch surface to emit second beams of light, wherein the second beams of light are reflected to travel above the touch surface,
a first set of light detectors arranged around a third portion of the periphery of the touch surface to receive light from the first set of emitters from the transmissive element
a second set of light detectors arranged around a fourth portion of the periphery of the touch surface to receive light from the second set of emitters from above the touch surface,
wherein each light detector is arranged to receive light from more than one emitter;
a processing element configured to determine, based on output signals of the first and second set of light detectors, the position of an object on the touch surface.
2. The touch sensing apparatus of claim 1 , wherein the first and second set of emitters comprise at least one common emitter.
3. The touch sensing apparatus of claim 1 , wherein the first and second set of detectors comprise at least one common detector.
4. The touch sensing system of any preceding claim wherein the processing element is configured to perform a first touch determination based on signals of the first set of light detectors and a second touch determination based on signals of the second set of light detectors, and wherein the the position of an object on the touch surface is determined in dependence on the first touch determination and second touch determination.
5. The touch sensing system of claim 4, wherein the processing element is configured to determine that the object is not touching the touch surface when the first touch determination indicates the presence of the object but the second touch determination indicates the absence of the object.
6. The touch sensing system of claim 4, wherein the processing element is configured to determine that the object is of a first object type when the first touch
determination indicates the absence of the object but the second touch
determination indicates the presence of the object.
7. The touch sensing system of claim 4, wherein the processing element is configured to determine the position of an object on the touch surface in
dependence on just the first touch determination when the object is occluded from the second beams of light.
8. The touch sensing system of any preceding claim wherein the first set of emitters is configured to emit light at a first wavelength and the first set of emitters is configured to detect light at the first wavelength, and wherein the second set of emitters is configured to emit light at a second wavelength and the second set of emitters is configured to detect light at the second wavelength.
9. The touch sensing system of any preceding claim wherein the touch sensing system is configured to activate the first set of emitters and the second set of emitters at non-overlapping times.
10. The touch sensing apparatus of any preceding claim, wherein the touch sensing system is configured to operate in a low-power mode wherein just the second set of emitters are powered, and wherein when the processing element determines the presence of an object on the touch surface from the second set of light detectors, entering a higher-power mode wherein the first and second set of emitters are powered.
1 1. The touch sensing apparatus of claims 1 -9, wherein the touch sensing system is configured to operate in a low-power mode wherein just the first set of emitters are powered, and wherein when the processing element determines the presence of an object on the touch surface from the first set of light detectors, entering a higher-power mode wherein the first set of emitters are powered and the second set of emitters are at least intermittently powered.
12. The touch sensing apparatus of any preceding claim, wherein the first and/or third portion is larger than the second and/or fourth portion.
13. The touch sensing apparatus of any preceding claim, wherein the number of the first set of emitters and/or first set of detectors is larger than the number of the second set of emitters and/or second set of detectors.
14. The touch sensing apparatus of claim 1 1 , wherein the ratio of the first set of emitters and/or first set of detectors to the number of the second set of emitters and/or second set of detectors is 4:1.
15. The touch sensing apparatus of any preceding claim, wherein the first and second set of emitters are spatially interleaved along the periphery of the touch surface.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/547,587 US10496227B2 (en) | 2015-02-09 | 2016-02-09 | Optical touch system comprising means for projecting and detecting light beams above and inside a transmissive panel |
CN201680008239.0A CN107209609A (en) | 2015-02-09 | 2016-02-09 | It is included in the optical touch system of the device of the projection of transmission panel above and within and detection light beam |
EP19165019.1A EP3537269A1 (en) | 2015-02-09 | 2016-02-09 | Optical touch system |
EP16749542.3A EP3256936A4 (en) | 2015-02-09 | 2016-02-09 | Optical touch system comprising means for projecting and detecting light beams above and inside a transmissive panel |
US16/666,013 US11029783B2 (en) | 2015-02-09 | 2019-10-28 | Optical touch system comprising means for projecting and detecting light beams above and inside a transmissive panel |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE1550145 | 2015-02-09 | ||
SE1550145-5 | 2015-02-09 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/547,587 A-371-Of-International US10496227B2 (en) | 2015-02-09 | 2016-02-09 | Optical touch system comprising means for projecting and detecting light beams above and inside a transmissive panel |
US16/666,013 Continuation US11029783B2 (en) | 2015-02-09 | 2019-10-28 | Optical touch system comprising means for projecting and detecting light beams above and inside a transmissive panel |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2016130074A1 true WO2016130074A1 (en) | 2016-08-18 |
WO2016130074A4 WO2016130074A4 (en) | 2016-10-13 |
Family
ID=56615022
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE2016/050098 WO2016130074A1 (en) | 2015-02-09 | 2016-02-09 | Optical touch system comprising means for projecting and detecting light beams above and inside a transmissive panel |
Country Status (4)
Country | Link |
---|---|
US (2) | US10496227B2 (en) |
EP (2) | EP3537269A1 (en) |
CN (1) | CN107209609A (en) |
WO (1) | WO2016130074A1 (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018174786A1 (en) * | 2017-03-22 | 2018-09-27 | Flatfrog Laboratories | Pen differentiation for touch displays |
WO2018182476A1 (en) * | 2017-03-28 | 2018-10-04 | Flatfrog Laboratories Ab | Touch sensing apparatus and method for assembly |
WO2019172827A1 (en) * | 2018-03-05 | 2019-09-12 | Flatfrog Laboratories Ab | Improved touch-sensing apparatus |
WO2019172826A1 (en) * | 2018-03-05 | 2019-09-12 | Flatfrog Laboratories Ab | Improved touch-sensing apparatus |
CN111052058A (en) * | 2017-09-01 | 2020-04-21 | 平蛙实验室股份公司 | Improved optical component |
EP3667475A1 (en) | 2016-12-07 | 2020-06-17 | FlatFrog Laboratories AB | A curved touch device |
US11029783B2 (en) | 2015-02-09 | 2021-06-08 | Flatfrog Laboratories Ab | Optical touch system comprising means for projecting and detecting light beams above and inside a transmissive panel |
US11182023B2 (en) | 2015-01-28 | 2021-11-23 | Flatfrog Laboratories Ab | Dynamic touch quarantine frames |
US11474644B2 (en) | 2017-02-06 | 2022-10-18 | Flatfrog Laboratories Ab | Optical coupling in touch-sensing systems |
US11893189B2 (en) | 2020-02-10 | 2024-02-06 | Flatfrog Laboratories Ab | Touch-sensing apparatus |
US11943563B2 (en) | 2019-01-25 | 2024-03-26 | FlatFrog Laboratories, AB | Videoconferencing terminal and method of operating the same |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE533704C2 (en) | 2008-12-05 | 2010-12-07 | Flatfrog Lab Ab | Touch sensitive apparatus and method for operating the same |
EP4075246A1 (en) | 2015-12-09 | 2022-10-19 | FlatFrog Laboratories AB | Stylus for optical touch system |
KR20180037749A (en) * | 2016-10-05 | 2018-04-13 | 에스프린팅솔루션 주식회사 | Display apparatus |
US10761657B2 (en) | 2016-11-24 | 2020-09-01 | Flatfrog Laboratories Ab | Automatic optimisation of touch signal |
US11231809B2 (en) * | 2017-07-11 | 2022-01-25 | Hewlett-Packard Development Company, L.P. | Touch input detection |
WO2019073300A1 (en) * | 2017-10-10 | 2019-04-18 | Rapt Ip Limited | Thin couplers and reflectors for sensing waveguides |
DE102018105607B4 (en) * | 2018-03-12 | 2022-05-25 | Sick Ag | Photoelectric sensor and method for detecting objects in a surveillance area |
US20220035481A1 (en) * | 2018-10-20 | 2022-02-03 | Flatfrog Laboratories Ab | Touch sensing apparatus |
US11624878B2 (en) | 2019-05-03 | 2023-04-11 | Beechrock Limited | Waveguide-based image capture |
US11624836B2 (en) * | 2019-09-24 | 2023-04-11 | Continental Autonomous Mobility US, LLC | Detection of damage to optical element of illumination system |
CN114730228A (en) * | 2019-11-25 | 2022-07-08 | 平蛙实验室股份公司 | Touch sensing equipment |
US11457204B1 (en) | 2020-11-06 | 2022-09-27 | Waymo Llc | Localized window contaminant detection |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20110122075A1 (en) * | 2009-11-23 | 2011-05-26 | Samsung Electronics Co., Ltd. | Multi-touch detecting appratus and method for lcd display apparatus |
US20110221705A1 (en) * | 2010-03-12 | 2011-09-15 | Samsung Electronics Co., Ltd. | Touch object and proximate object sensing apparatus by selectively radiating light |
US20130155027A1 (en) * | 2008-06-19 | 2013-06-20 | Neonode Inc. | Optical touch screen systems using total internal reflection |
US20140192023A1 (en) * | 2013-01-10 | 2014-07-10 | Samsung Display Co., Ltd. | Proximity and touch sensing surface for integration with a display |
Family Cites Families (655)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1452041A (en) | 1965-04-26 | 1966-02-25 | Electronique & Automatisme Sa | Communication device with an electronic calculator |
US3440426A (en) | 1966-01-11 | 1969-04-22 | Us Navy | Solar attitude encoder |
US3673327A (en) | 1970-11-02 | 1972-06-27 | Atomic Energy Commission | Touch actuable data input panel assembly |
IT961146B (en) | 1971-03-12 | 1973-12-10 | Schlumberger Compteurs | DEVICE PERMITTING ME TO DETERMINE THE DIRECTION OF A BRIGHT RADIATION |
FR2172828B1 (en) | 1972-02-23 | 1974-12-13 | Dassault Electronique | |
DE2654464A1 (en) | 1976-12-01 | 1978-06-08 | Sick Optik Elektronik Erwin | PHOTOELECTRIC LIGHT RECEIVING ARRANGEMENT |
US4129384A (en) | 1977-06-08 | 1978-12-12 | Batelle Memorial Institute | Optical extensometer |
US4254333A (en) | 1978-05-31 | 1981-03-03 | Bergstroem Arne | Optoelectronic circuit element |
US4209255A (en) | 1979-03-30 | 1980-06-24 | United Technologies Corporation | Single source aiming point locator |
US4213707A (en) | 1979-04-25 | 1980-07-22 | Eastman Kodak Company | Device for improving the accuracy of optical measuring apparatus and the like |
US4254407A (en) | 1979-07-18 | 1981-03-03 | Ncr Corporation | Data processing system having optically linked subsystems, including an optical keyboard |
US4294543A (en) | 1979-11-13 | 1981-10-13 | Command Control & Communications Corporation | Optical system for developing point coordinate information |
US4346376A (en) | 1980-04-16 | 1982-08-24 | Bell Telephone Laboratories, Incorporated | Touch position sensitive surface |
US4484179A (en) | 1980-04-16 | 1984-11-20 | At&T Bell Laboratories | Touch position sensitive surface |
US4420261A (en) | 1980-09-02 | 1983-12-13 | Lowbar, Inc. | Optical position location apparatus |
JPS58111705A (en) | 1981-12-25 | 1983-07-02 | Mitsutoyo Mfg Co Ltd | Optical measuring device |
US4459476A (en) | 1982-01-19 | 1984-07-10 | Zenith Radio Corporation | Co-ordinate detection system |
US4542375A (en) | 1982-02-11 | 1985-09-17 | At&T Bell Laboratories | Deformable touch sensitive surface |
GB2131544B (en) | 1982-12-07 | 1986-03-05 | Lowbar Inc | Optical postition location apparatus |
US4593191A (en) | 1982-12-29 | 1986-06-03 | At&T Bell Laboratories | Pressure and optical sensitive device with deformable protrusions |
GB8302997D0 (en) | 1983-02-03 | 1983-03-09 | Bergstrom A | Electromagnetic radiation circuit element |
US4507557A (en) | 1983-04-01 | 1985-03-26 | Siemens Corporate Research & Support, Inc. | Non-contact X,Y digitizer using two dynamic ram imagers |
US4550250A (en) | 1983-11-14 | 1985-10-29 | Hei, Inc. | Cordless digital graphics input device |
US4752655A (en) | 1984-11-16 | 1988-06-21 | Nippon Telegraph & Telephone Corporation | Coordinate input device |
US4692809A (en) | 1984-11-20 | 1987-09-08 | Hughes Aircraft Company | Integrated touch paint system for displays |
US4673918A (en) | 1984-11-29 | 1987-06-16 | Zenith Electronics Corporation | Light guide having focusing element and internal reflector on same face |
JPH0325219Y2 (en) | 1985-02-15 | 1991-05-31 | ||
JPH0325220Y2 (en) | 1985-02-15 | 1991-05-31 | ||
US4710760A (en) | 1985-03-07 | 1987-12-01 | American Telephone And Telegraph Company, At&T Information Systems Inc. | Photoelastic touch-sensitive screen |
US4688993A (en) | 1985-03-21 | 1987-08-25 | United Technologies Corporation | Tangential link swashplate centering member |
DE3511330A1 (en) | 1985-03-28 | 1986-10-02 | Siemens Ag | Arrangement for inputting graphic patterns |
US5159322A (en) | 1985-04-19 | 1992-10-27 | Loebner Hugh G | Apparatus to digitize graphic and scenic information and to determine the position of a stylus for input into a computer or the like |
US5073770A (en) | 1985-04-19 | 1991-12-17 | Lowbner Hugh G | Brightpen/pad II |
US4949079A (en) | 1985-04-19 | 1990-08-14 | Hugh Loebner | Brightpen/pad graphic device for computer inputs and the like |
US4688933A (en) | 1985-05-10 | 1987-08-25 | The Laitram Corporation | Electro-optical position determining system |
US4736191A (en) | 1985-08-02 | 1988-04-05 | Karl E. Matzke | Touch activated control method and apparatus |
JPH0318997Y2 (en) | 1985-10-04 | 1991-04-22 | ||
JPH0762821B2 (en) | 1986-05-30 | 1995-07-05 | 株式会社日立製作所 | Touch panel input device |
US4782328A (en) | 1986-10-02 | 1988-11-01 | Product Development Services, Incorporated | Ambient-light-responsive touch screen data input method and system |
US4891829A (en) | 1986-11-19 | 1990-01-02 | Exxon Research And Engineering Company | Method and apparatus for utilizing an electro-optic detector in a microtomography system |
US4868912A (en) | 1986-11-26 | 1989-09-19 | Digital Electronics | Infrared touch panel |
US4746770A (en) | 1987-02-17 | 1988-05-24 | Sensor Frame Incorporated | Method and apparatus for isolating and manipulating graphic objects on computer video monitor |
US4820050A (en) | 1987-04-28 | 1989-04-11 | Wells-Gardner Electronics Corporation | Solid-state optical position determining apparatus |
FR2614711B1 (en) | 1987-04-29 | 1992-03-13 | Photonetics | METHOD AND DEVICE FOR OPERATING THE SCREEN SIGNAL OF A TOUCH SCREEN |
FR2617619B1 (en) | 1987-07-02 | 1990-01-05 | Photonetics | OPTICAL TOUCH SCREEN MOUNTING DEVICE |
FR2617620B1 (en) | 1987-07-02 | 1992-09-25 | Photonetics | OPTICAL TYPE TOUCH SCREEN |
US4772763A (en) | 1987-08-25 | 1988-09-20 | International Business Machines Corporation | Data processing information input using optically sensed stylus features |
JPH01195526A (en) | 1988-01-29 | 1989-08-07 | Sony Corp | Touch panel device |
FR2631438B1 (en) | 1988-05-11 | 1991-06-21 | Photonetics | METHOD FOR POSITIONING AN OBJECT RELATIVE TO A PLANE, METHOD FOR MEASURING LENGTH AND DEVICES FOR CARRYING OUT SAID METHODS |
US4988983A (en) | 1988-09-02 | 1991-01-29 | Carroll Touch, Incorporated | Touch entry system with ambient compensation and programmable amplification |
US4986662A (en) | 1988-12-19 | 1991-01-22 | Amp Incorporated | Touch entry using discrete reflectors |
FR2645645B1 (en) | 1989-04-06 | 1991-07-12 | Photonetics | IMPROVEMENTS IN METHODS AND DEVICES FOR DETERMINING THE ANGLE OF CONTACT OF A DROP OF LIQUID PLACED ON A SUBSTRATE |
US4916712A (en) | 1989-07-27 | 1990-04-10 | Mcdonnell Douglas Corporation | Optically pumped slab laser |
US5065185A (en) | 1989-08-21 | 1991-11-12 | Powers Edward A | Multi-function detecting device for a document reproduction machine |
DE69016739T2 (en) | 1989-10-16 | 1995-06-14 | Chiroscience Ltd | Chiral azabicycloheptanones and process for their preparation. |
US5105186A (en) | 1990-05-25 | 1992-04-14 | Hewlett-Packard Company | Lcd touch screen |
US6390370B1 (en) | 1990-11-15 | 2002-05-21 | Symbol Technologies, Inc. | Light beam scanning pen, scan module for the device and method of utilization |
US5166668A (en) | 1991-04-10 | 1992-11-24 | Data Stream Corporation | Wireless pen-type input device for use with a computer |
FR2676275A1 (en) | 1991-05-07 | 1992-11-13 | Photonetics | DEVICE FOR REMOTELY MEASURING THE POSITION OF AN OBJECT. |
US5539514A (en) | 1991-06-26 | 1996-07-23 | Hitachi, Ltd. | Foreign particle inspection apparatus and method with front and back illumination |
US5345490A (en) | 1991-06-28 | 1994-09-06 | General Electric Company | Method and apparatus for converting computed tomography (CT) data into finite element models |
US5335557A (en) | 1991-11-26 | 1994-08-09 | Taizo Yasutake | Touch sensitive input control device |
JPH05190066A (en) | 1992-01-14 | 1993-07-30 | Matsushita Electric Ind Co Ltd | Light shielding plate device of touch switch |
CA2060564C (en) | 1992-02-06 | 1996-05-21 | Toru Suzuki | Wireless input system for computer |
US5483261A (en) | 1992-02-14 | 1996-01-09 | Itu Research, Inc. | Graphical input controller and method with rear screen image detection |
CH683370A5 (en) | 1992-04-10 | 1994-02-28 | Zumbach Electronic Ag | Method and apparatus for measuring the dimension of an object. |
CA2068191C (en) | 1992-05-07 | 1994-11-22 | Fernand Sergerie | Reinforced composite backing tape |
US7084859B1 (en) | 1992-09-18 | 2006-08-01 | Pryor Timothy R | Programmable tactile touch screen displays and man-machine interfaces for improved vehicle instrumentation and telematics |
US5248856A (en) | 1992-10-07 | 1993-09-28 | Microfield Graphics, Inc. | Code-based, electromagnetic-field-responsive graphic data-acquisition system |
DE69318677T2 (en) | 1992-11-25 | 1999-02-18 | Sumitomo Electric Industries | Method of detecting contaminants in molten plastic |
US5502568A (en) | 1993-03-23 | 1996-03-26 | Wacom Co., Ltd. | Optical position detecting unit, optical coordinate input unit and optical position detecting method employing a pattern having a sequence of 1's and 0's |
JP3400485B2 (en) | 1993-03-23 | 2003-04-28 | 株式会社ワコム | Optical position detecting device and optical coordinate input device |
DE4334937A1 (en) | 1993-10-13 | 1995-10-05 | Siemens Ag | Computer tomograph |
JP3135183B2 (en) | 1993-10-29 | 2001-02-13 | 株式会社ワコム | Position indicator |
WO1995014286A1 (en) | 1993-11-17 | 1995-05-26 | Microsoft Corporation | Wireless pen computer input system |
US5484966A (en) | 1993-12-07 | 1996-01-16 | At&T Corp. | Sensing stylus position using single 1-D image sensor |
JPH07200137A (en) | 1993-12-28 | 1995-08-04 | Wacom Co Ltd | Position detection device and its position indicator |
US5515083A (en) | 1994-02-17 | 1996-05-07 | Spacelabs Medical, Inc. | Touch screen having reduced sensitivity to spurious selections |
JPH07261920A (en) | 1994-03-17 | 1995-10-13 | Wacom Co Ltd | Optical position detector and optical coordinate input device |
JP3421416B2 (en) | 1994-03-18 | 2003-06-30 | 株式会社ワコム | Position detecting device and its position indicator |
US5525764A (en) | 1994-06-09 | 1996-06-11 | Junkins; John L. | Laser scanning graphic input system |
US5526422A (en) | 1994-06-20 | 1996-06-11 | At&T Corp. | System and method for cleaning the display screen of a touch screen device |
DE19521254A1 (en) | 1994-06-24 | 1996-01-04 | Minnesota Mining & Mfg | Display system with brightness boosting film |
US5740224A (en) | 1994-09-27 | 1998-04-14 | University Of Delaware | Cone beam synthetic arrays in three-dimensional computerized tomography |
US5686942A (en) | 1994-12-01 | 1997-11-11 | National Semiconductor Corporation | Remote computer input system which detects point source on operator |
US5736686A (en) | 1995-03-01 | 1998-04-07 | Gtco Corporation | Illumination apparatus for a digitizer tablet with improved light panel |
US5764223A (en) | 1995-06-07 | 1998-06-09 | International Business Machines Corporation | Touch-screen input device using the monitor as a light source operating at an intermediate frequency |
US6031524A (en) | 1995-06-07 | 2000-02-29 | Intermec Ip Corp. | Hand-held portable data terminal having removably interchangeable, washable, user-replaceable components with liquid-impervious seal |
WO1997001728A1 (en) | 1995-06-29 | 1997-01-16 | Siemens Components, Inc. | Localized illumination using tir technology |
GB9516441D0 (en) | 1995-08-10 | 1995-10-11 | Philips Electronics Uk Ltd | Light pen input systems |
US6122394A (en) | 1996-05-01 | 2000-09-19 | Xros, Inc. | Compact, simple, 2D raster, image-building fingerprint scanner |
US6504143B2 (en) | 1996-05-29 | 2003-01-07 | Deutsche Telekom Ag | Device for inputting data |
US6067079A (en) | 1996-06-13 | 2000-05-23 | International Business Machines Corporation | Virtual pointing device for touchscreens |
DE19631414A1 (en) | 1996-08-05 | 1998-02-19 | Daimler Benz Ag | Device for recording the retinal reflex image and superimposing additional images in the eye |
CN100340957C (en) | 1996-08-12 | 2007-10-03 | 埃罗接触系统公司 | Acoustic condition sensor employing plurality of mutually non-orthogonal waves |
US5767517A (en) | 1996-10-21 | 1998-06-16 | Board Of Regents -Univ. Of Ne | Hybrid resampling method for fan beam spect |
DE69739633D1 (en) | 1996-11-28 | 2009-12-10 | Casio Computer Co Ltd | display device |
US6061177A (en) | 1996-12-19 | 2000-05-09 | Fujimoto; Kenneth Noboru | Integrated computer display and graphical input apparatus and method |
US6380732B1 (en) | 1997-02-13 | 2002-04-30 | Super Dimension Ltd. | Six-degree of freedom tracking system having a passive transponder on the object being tracked |
JPH113169A (en) | 1997-06-13 | 1999-01-06 | Tokai Rika Co Ltd | Touch operation information output device |
US6229529B1 (en) | 1997-07-11 | 2001-05-08 | Ricoh Company, Ltd. | Write point detecting circuit to detect multiple write points |
DE69838535T2 (en) | 1997-08-07 | 2008-07-10 | Fujitsu Ltd., Kawasaki | Optically scanning touch-sensitive panel |
US6141104A (en) | 1997-09-09 | 2000-10-31 | Image Guided Technologies, Inc. | System for determination of a location in three dimensional space |
US6909419B2 (en) | 1997-10-31 | 2005-06-21 | Kopin Corporation | Portable microdisplay system |
US5945980A (en) | 1997-11-14 | 1999-08-31 | Logitech, Inc. | Touchpad with active plane for pen detection |
US9292111B2 (en) | 1998-01-26 | 2016-03-22 | Apple Inc. | Gesturing with a multipoint sensing device |
KR100595917B1 (en) | 1998-01-26 | 2006-07-05 | 웨인 웨스터만 | Method and apparatus for integrating manual input |
US6315156B1 (en) | 1998-01-26 | 2001-11-13 | Gpax International, Inc. | Tape-form packaging system and apparatus for effecting assembly and disassembly thereof |
DE19809934A1 (en) | 1998-03-07 | 1999-09-09 | Bosch Gmbh Robert | Laser display panel with contact detection |
AU6633798A (en) | 1998-03-09 | 1999-09-27 | Gou Lite Ltd. | Optical translation measurement |
US6172667B1 (en) | 1998-03-19 | 2001-01-09 | Michel Sayag | Optically-based touch screen input device |
US6748098B1 (en) | 1998-04-14 | 2004-06-08 | General Electric Company | Algebraic reconstruction of images from non-equidistant data |
US7268774B2 (en) | 1998-08-18 | 2007-09-11 | Candledragon, Inc. | Tracking motion of a writing instrument |
JP3827450B2 (en) | 1998-08-18 | 2006-09-27 | 富士通株式会社 | Optical scanning touch panel |
US6972753B1 (en) | 1998-10-02 | 2005-12-06 | Semiconductor Energy Laboratory Co., Ltd. | Touch panel, display device provided with touch panel and electronic equipment provided with display device |
JP3530758B2 (en) | 1998-12-03 | 2004-05-24 | キヤノン株式会社 | Pointer for inputting coordinates |
JP4007705B2 (en) | 1998-11-20 | 2007-11-14 | 富士通株式会社 | Optical scanning touch panel |
US6175999B1 (en) | 1999-01-12 | 2001-01-23 | Dell Usa, L.P. | Universal fixture for pre-assembly of computer components |
JP4245721B2 (en) | 1999-03-05 | 2009-04-02 | プラスビジョン株式会社 | Coordinate input pen |
US6333735B1 (en) | 1999-03-16 | 2001-12-25 | International Business Machines Corporation | Method and apparatus for mouse positioning device based on infrared light sources and detectors |
JP4097353B2 (en) | 1999-04-07 | 2008-06-11 | 富士通株式会社 | Optical scanning touch panel |
JP4939682B2 (en) | 1999-04-27 | 2012-05-30 | エーユー オプトロニクス コーポレイション | Display device |
DE19924448A1 (en) | 1999-05-28 | 2000-12-07 | Siemens Ag | Three-dimensional data set extraction method for magnetic resonance imaging |
FR2794246B1 (en) | 1999-05-31 | 2001-08-10 | Saint Louis Inst | DEVICE CAPABLE OF DETERMINING THE POSITION OF AN OBJECT IN AN OXZ MARK |
US6799141B1 (en) | 1999-06-09 | 2004-09-28 | Beamcontrol Aps | Method for determining the channel gain between emitters and receivers |
FR2795877B1 (en) | 1999-06-30 | 2001-10-05 | Photonetics | PARTIALLY REFLECTIVE OPTICAL COMPONENT AND LASER SOURCE INCORPORATING SUCH COMPONENT |
US6366277B1 (en) | 1999-10-13 | 2002-04-02 | Elo Touchsystems, Inc. | Contaminant processing system for an acoustic touchscreen |
JP3606138B2 (en) | 1999-11-05 | 2005-01-05 | セイコーエプソン株式会社 | Driver IC, electro-optical device and electronic apparatus |
JP2001147772A (en) | 1999-11-19 | 2001-05-29 | Fujitsu Takamisawa Component Ltd | Touch panel |
JP3780785B2 (en) | 1999-11-30 | 2006-05-31 | 三菱電機株式会社 | Concavity and convexity pattern detector |
CA2393164C (en) | 1999-12-02 | 2008-04-01 | Elo Touchsystems, Inc. | Apparatus and method to improve resolution of infrared touch systems |
JP2001183987A (en) | 1999-12-27 | 2001-07-06 | Pioneer Electronic Corp | Cooling structure and display device using the same |
US20040252867A1 (en) | 2000-01-05 | 2004-12-16 | Je-Hsiung Lan | Biometric sensor |
JP3881148B2 (en) | 2000-02-18 | 2007-02-14 | 株式会社リコー | Photodetection device for coordinate detection, coordinate input / detection device, electronic blackboard, mounting position detection method, and storage medium |
US6495832B1 (en) | 2000-03-15 | 2002-12-17 | Touch Controls, Inc. | Photoelectric sensing array apparatus and method of using same |
AU2001251344A1 (en) | 2000-04-05 | 2001-10-23 | Dimensional Media Associates, Inc. | Methods and apparatus for virtual touchscreen computer interface controller |
US7859519B2 (en) | 2000-05-01 | 2010-12-28 | Tulbert David J | Human-machine interface |
US6864882B2 (en) | 2000-05-24 | 2005-03-08 | Next Holdings Limited | Protected touch panel display system |
US6690363B2 (en) | 2000-06-19 | 2004-02-10 | Next Holdings Limited | Touch panel display system |
US6724489B2 (en) | 2000-09-22 | 2004-04-20 | Daniel Freifeld | Three dimensional scanning camera |
US6660964B1 (en) | 2000-09-22 | 2003-12-09 | David Benderly | Optical modification of laser beam cross section in object marking systems |
AU2001212430A1 (en) | 2000-10-27 | 2002-05-06 | Elo Touchsystems, Inc. | Touch confirming touchscreen utilizing plural touch sensors |
JP4087247B2 (en) | 2000-11-06 | 2008-05-21 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Measuring method of input device movement |
US6648485B1 (en) | 2000-11-13 | 2003-11-18 | International Business Machines Corporation | Highly collimating tapered light guide for uniform illumination of flat panel displays |
US6940286B2 (en) | 2000-12-30 | 2005-09-06 | University Of Leeds | Electrical impedance tomography |
JP4004025B2 (en) | 2001-02-13 | 2007-11-07 | 日東電工株式会社 | Transparent conductive laminate and touch panel |
DE10110744A1 (en) | 2001-03-07 | 2002-09-26 | Franc Godler | Large, touch-sensitive area with time and location-controlled transmitter and receiver modules |
US6452996B1 (en) | 2001-03-16 | 2002-09-17 | Ge Medical Systems Global Technology Company, Llc | Methods and apparatus utilizing generalized helical interpolation algorithm |
JP4768143B2 (en) | 2001-03-26 | 2011-09-07 | 株式会社リコー | Information input / output device, information input / output control method, and program |
US6738051B2 (en) | 2001-04-06 | 2004-05-18 | 3M Innovative Properties Company | Frontlit illuminated touch panel |
JP4812181B2 (en) | 2001-04-20 | 2011-11-09 | オリンパス株式会社 | Observation optical system, imaging optical system, and apparatus using the same |
US6992659B2 (en) | 2001-05-22 | 2006-01-31 | Palmone, Inc. | High transparency integrated enclosure touch screen assembly for a portable hand held device |
JP3959678B2 (en) | 2001-07-13 | 2007-08-15 | ミネベア株式会社 | Touch panel for display device |
DE10136611C1 (en) | 2001-07-23 | 2002-11-21 | Jenoptik Laserdiode Gmbh | Optical device, for laser light emitted by laser diode device, has collimation optical element and homogenizing element using multiple reflection of laser beam |
US6927384B2 (en) | 2001-08-13 | 2005-08-09 | Nokia Mobile Phones Ltd. | Method and device for detecting touch pad unit |
US6985137B2 (en) | 2001-08-13 | 2006-01-10 | Nokia Mobile Phones Ltd. | Method for preventing unintended touch pad input due to accidental touching |
US6765193B2 (en) | 2001-08-21 | 2004-07-20 | National Science And Technology Development Agency | Optical touch switch structures |
US20030048257A1 (en) | 2001-09-06 | 2003-03-13 | Nokia Mobile Phones Ltd. | Telephone set having a touch pad device |
US7254775B2 (en) | 2001-10-03 | 2007-08-07 | 3M Innovative Properties Company | Touch panel system and method for distinguishing multiple touch inputs |
WO2003032138A2 (en) | 2001-10-09 | 2003-04-17 | Koninklijke Philips Electronics N.V. | Device having touch sensitivity functionality |
US9471170B2 (en) | 2002-11-04 | 2016-10-18 | Neonode Inc. | Light-based touch screen with shift-aligned emitter and receiver lenses |
US20100238139A1 (en) | 2009-02-15 | 2010-09-23 | Neonode Inc. | Optical touch screen systems using wide light beams |
US20120188206A1 (en) | 2001-11-02 | 2012-07-26 | Neonode, Inc. | Optical touch screen with tri-directional micro-lenses |
US8339379B2 (en) | 2004-04-29 | 2012-12-25 | Neonode Inc. | Light-based touch screen |
US6948840B2 (en) | 2001-11-16 | 2005-09-27 | Everbrite, Llc | Light emitting diode light bar |
US6664498B2 (en) | 2001-12-04 | 2003-12-16 | General Atomics | Method and apparatus for increasing the material removal rate in laser machining |
KR100449710B1 (en) | 2001-12-10 | 2004-09-22 | 삼성전자주식회사 | Remote pointing method and apparatus therefor |
US7006080B2 (en) | 2002-02-19 | 2006-02-28 | Palm, Inc. | Display system |
JP4477811B2 (en) | 2002-02-27 | 2010-06-09 | Hoya株式会社 | Mounting plate for solid-state image sensor and mounting method to the mounting plate |
DE60307077T2 (en) | 2002-03-13 | 2007-03-01 | O-Pen Aps | TOUCH PAD AND METHOD FOR OPERATING THE TOUCH PAD |
DE10211307A1 (en) | 2002-03-13 | 2003-11-20 | Mechaless Systems Gmbh | Device and method for optoelectronic detection of the movement and / or position of an object |
EP1576533A2 (en) | 2002-03-27 | 2005-09-21 | Nellcor Puritan Bennett Incorporated | Infrared touchframe system |
DE50308334D1 (en) | 2002-05-07 | 2007-11-22 | Schott Ag | Lighting device for buttons |
JP2003330603A (en) | 2002-05-13 | 2003-11-21 | Ricoh Co Ltd | Coordinate detecting device and method, coordinate detecting program for making computer execute the same method and recording medium with its program recorded |
US7176897B2 (en) | 2002-05-17 | 2007-02-13 | 3M Innovative Properties Company | Correction of memory effect errors in force-based touch panel systems |
US7952570B2 (en) | 2002-06-08 | 2011-05-31 | Power2B, Inc. | Computer navigation |
US20090143141A1 (en) | 2002-08-06 | 2009-06-04 | Igt | Intelligent Multiplayer Gaming System With Multi-Touch Display |
US7151532B2 (en) | 2002-08-09 | 2006-12-19 | 3M Innovative Properties Company | Multifunctional multilayer optical film |
JP2004078613A (en) | 2002-08-19 | 2004-03-11 | Fujitsu Ltd | Touch panel system |
WO2004032210A2 (en) | 2002-10-01 | 2004-04-15 | Microfabrica Inc. | Monolithic structures including alignment and/or retention fixtures for accepting components |
US7133031B2 (en) | 2002-10-31 | 2006-11-07 | Microsoft Corporation | Optical system design for a universal computing device |
JP4093308B2 (en) | 2002-11-01 | 2008-06-04 | 富士通株式会社 | Touch panel device and contact position detection method |
US8587562B2 (en) | 2002-11-04 | 2013-11-19 | Neonode Inc. | Light-based touch screen using elliptical and parabolic reflectors |
US8902196B2 (en) | 2002-12-10 | 2014-12-02 | Neonode Inc. | Methods for determining a touch location on a touch screen |
US7042444B2 (en) | 2003-01-17 | 2006-05-09 | Eastman Kodak Company | OLED display and touch screen |
US7629967B2 (en) | 2003-02-14 | 2009-12-08 | Next Holdings Limited | Touch screen signal processing |
US7532206B2 (en) | 2003-03-11 | 2009-05-12 | Smart Technologies Ulc | System and method for differentiating between pointers used to contact touch surface |
CN1777859B (en) | 2003-03-12 | 2010-04-28 | 平蛙实验室股份公司 | System and method for determining ray emmitting unit |
CN1777860A (en) | 2003-03-12 | 2006-05-24 | O-笔公司 | Multi-task ray sensor |
KR100533839B1 (en) | 2003-03-14 | 2005-12-07 | 삼성전자주식회사 | Control device of electronic devices based on motion |
US7097106B2 (en) | 2003-04-07 | 2006-08-29 | Silverbrook Research Pty Ltd | Handheld laser scanner |
US7786983B2 (en) | 2003-04-08 | 2010-08-31 | Poa Sana Liquidating Trust | Apparatus and method for a data input device using a light lamina screen |
US7133032B2 (en) | 2003-04-24 | 2006-11-07 | Eastman Kodak Company | OLED display and touch screen |
US7362320B2 (en) | 2003-06-05 | 2008-04-22 | Hewlett-Packard Development Company, L.P. | Electronic device having a light emitting/detecting display screen |
JP2005004278A (en) | 2003-06-09 | 2005-01-06 | Ricoh Elemex Corp | Coordinate input device |
US7432893B2 (en) | 2003-06-14 | 2008-10-07 | Massachusetts Institute Of Technology | Input device based on frustrated total internal reflection |
US7474772B2 (en) | 2003-06-25 | 2009-01-06 | Atrua Technologies, Inc. | System and method for a miniature user input device |
JP4405766B2 (en) | 2003-08-07 | 2010-01-27 | キヤノン株式会社 | Coordinate input device, coordinate input method |
US7796173B2 (en) | 2003-08-13 | 2010-09-14 | Lettvin Jonathan D | Imaging system |
US7359041B2 (en) | 2003-09-04 | 2008-04-15 | Avago Technologies Ecbu Ip Pte Ltd | Method and system for optically tracking a target using a triangulation technique |
US7442914B2 (en) | 2003-09-12 | 2008-10-28 | Flatfrog Laboratories Ab | System and method of determining a position of a radiation emitting element |
EP1665024B1 (en) | 2003-09-12 | 2011-06-29 | FlatFrog Laboratories AB | A system and method of determining a position of a radiation scattering/reflecting element |
KR100534968B1 (en) | 2003-09-16 | 2005-12-08 | 현대자동차주식회사 | cooling structure of an electronic element |
KR20070005547A (en) | 2003-09-22 | 2007-01-10 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | Coordinate detection system for a display monitor |
KR20060135610A (en) | 2003-09-22 | 2006-12-29 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | Touch input screen using a light guide |
US9123077B2 (en) | 2003-10-07 | 2015-09-01 | Hospira, Inc. | Medication management system |
US7221374B2 (en) | 2003-10-21 | 2007-05-22 | Hewlett-Packard Development Company, L.P. | Adjustment of color in displayed images based on identification of ambient light sources |
JP2005165199A (en) | 2003-12-05 | 2005-06-23 | Alps Electric Co Ltd | Prism sheet, lighting device, surface emitting apparatus, and liquid crystal display device |
US7265748B2 (en) | 2003-12-11 | 2007-09-04 | Nokia Corporation | Method and device for detecting touch pad input |
AU2004300444B2 (en) | 2003-12-11 | 2009-06-11 | Signify North America Corporation | Thermal management methods and apparatus for lighting devices |
GB2409304B (en) | 2003-12-19 | 2007-11-14 | Westerngeco Ltd | Processing geophysical data |
JP4616559B2 (en) | 2004-01-15 | 2011-01-19 | 大日本印刷株式会社 | Display device and display system |
US7087907B1 (en) | 2004-02-02 | 2006-08-08 | Advanced Micro Devices, Inc. | Detection of contamination in imaging systems by fluorescence and/or absorption spectroscopy |
US7342705B2 (en) | 2004-02-03 | 2008-03-11 | Idc, Llc | Spatial light modulator with integrated optical compensation structure |
JP4522113B2 (en) | 2004-03-11 | 2010-08-11 | キヤノン株式会社 | Coordinate input device |
US20060033725A1 (en) | 2004-06-03 | 2006-02-16 | Leapfrog Enterprises, Inc. | User created interactive interface |
US7310090B2 (en) | 2004-03-25 | 2007-12-18 | Avago Technologies Ecbm Ip (Singapore) Pte Ltd. | Optical generic switch panel |
US6965836B2 (en) | 2004-04-19 | 2005-11-15 | Battelle Energy Alliance, Llc | Method and apparatus for two dimensional surface property analysis based on boundary measurement |
US7538759B2 (en) * | 2004-05-07 | 2009-05-26 | Next Holdings Limited | Touch panel display system with illumination and detection provided from a single edge |
US20060017706A1 (en) | 2004-05-11 | 2006-01-26 | Motion Computing, Inc. | Display for stylus input displays |
JP4429083B2 (en) | 2004-06-03 | 2010-03-10 | キヤノン株式会社 | Shading type coordinate input device and coordinate input method thereof |
GB0413747D0 (en) | 2004-06-19 | 2004-07-21 | Atomic Energy Authority Uk | Optical keyboard |
US7743348B2 (en) | 2004-06-30 | 2010-06-22 | Microsoft Corporation | Using physical objects to adjust attributes of an interactive display application |
US8184108B2 (en) | 2004-06-30 | 2012-05-22 | Poa Sana Liquidating Trust | Apparatus and method for a folded optical element waveguide for use with light based touch screens |
US7565020B2 (en) | 2004-07-03 | 2009-07-21 | Microsoft Corp. | System and method for image coding employing a hybrid directional prediction and wavelet lifting |
DK1779222T3 (en) | 2004-07-06 | 2016-08-15 | Maricare Oy | SENSOR PRODUCT FOR ELECTRIC FIELD SENSING |
JP2006039686A (en) | 2004-07-22 | 2006-02-09 | Pioneer Electronic Corp | Touch panel device, touch region detecting method, and touch region detecting program |
US7653883B2 (en) | 2004-07-30 | 2010-01-26 | Apple Inc. | Proximity detector in handheld device |
US20060038698A1 (en) | 2004-08-19 | 2006-02-23 | Chen Jim T | Multi-purpose remote control input device |
JP4761736B2 (en) | 2004-08-20 | 2011-08-31 | 東芝モバイルディスプレイ株式会社 | Liquid crystal display |
US20060061861A1 (en) | 2004-09-23 | 2006-03-23 | Reflexite Corporation | High performance rear-projection screen |
US20060066586A1 (en) | 2004-09-27 | 2006-03-30 | Gally Brian J | Touchscreens for displays |
EP1815388B1 (en) | 2004-11-15 | 2013-03-06 | Hologic, Inc. | Matching geometry generation and display of mammograms and tomosynthesis images |
US8599140B2 (en) | 2004-11-17 | 2013-12-03 | International Business Machines Corporation | Providing a frustrated total internal reflection touch interface |
US7847789B2 (en) | 2004-11-23 | 2010-12-07 | Microsoft Corporation | Reducing accidental touch-sensitive device activation |
US20060132454A1 (en) | 2004-12-16 | 2006-06-22 | Deng-Peng Chen | Systems and methods for high resolution optical touch position systems |
US20060158437A1 (en) | 2005-01-20 | 2006-07-20 | Blythe Michael M | Display device |
US7800594B2 (en) | 2005-02-03 | 2010-09-21 | Toshiba Matsushita Display Technology Co., Ltd. | Display device including function to input information from screen by light |
US8298078B2 (en) | 2005-02-28 | 2012-10-30 | Wms Gaming Inc. | Wagering game machine with biofeedback-aware game presentation |
US20060202974A1 (en) | 2005-03-10 | 2006-09-14 | Jeffrey Thielman | Surface |
US20090135162A1 (en) * | 2005-03-10 | 2009-05-28 | Koninklijke Philips Electronics, N.V. | System and Method For Detecting the Location, Size and Shape of Multiple Objects That Interact With a Touch Screen Display |
US7705835B2 (en) | 2005-03-28 | 2010-04-27 | Adam Eikman | Photonic touch screen apparatus and method of use |
US7840625B2 (en) | 2005-04-07 | 2010-11-23 | California Institute Of Technology | Methods for performing fast discrete curvelet transforms of data |
WO2006124551A2 (en) | 2005-05-12 | 2006-11-23 | Lee Daniel J | A reconfigurable interactive interface device including an optical display and optical touchpad that use aerogel to direct light in a desired direction |
US7646833B1 (en) | 2005-05-23 | 2010-01-12 | Marvell International Ltd. | Channel equalization in receivers |
US7995039B2 (en) | 2005-07-05 | 2011-08-09 | Flatfrog Laboratories Ab | Touch pad system |
US7916144B2 (en) | 2005-07-13 | 2011-03-29 | Siemens Medical Solutions Usa, Inc. | High speed image reconstruction for k-space trajectory data using graphic processing unit (GPU) |
US7629968B2 (en) | 2005-07-29 | 2009-12-08 | Avago Technologies Fiber Ip (Singapore) Pte. Ltd. | Methods and systems for detecting selections on a touch screen display |
US7737959B2 (en) | 2005-09-08 | 2010-06-15 | Avago Technologies Ecbu Ip (Singapore) Pte. Ltd. | Position detection system using laser speckle |
KR20070030547A (en) | 2005-09-13 | 2007-03-16 | 삼성전자주식회사 | Condensing member, mathod of manufacturing thereof and display apparatus having the same |
JP4510738B2 (en) | 2005-09-28 | 2010-07-28 | 株式会社 日立ディスプレイズ | Display device |
US8847924B2 (en) | 2005-10-03 | 2014-09-30 | Hewlett-Packard Development Company, L.P. | Reflecting light |
JP2007128497A (en) | 2005-10-05 | 2007-05-24 | Sony Corp | Display apparatus and method thereof |
US20070109239A1 (en) | 2005-11-14 | 2007-05-17 | Den Boer Willem | Integrated light sensitive liquid crystal display |
US7655901B2 (en) | 2005-11-18 | 2010-02-02 | Research In Motion Limited | Light assisted keyboard for mobile communication device |
JP2007163891A (en) | 2005-12-14 | 2007-06-28 | Sony Corp | Display apparatus |
US8077147B2 (en) | 2005-12-30 | 2011-12-13 | Apple Inc. | Mouse with optical sensing surface |
US8013845B2 (en) | 2005-12-30 | 2011-09-06 | Flatfrog Laboratories Ab | Optical touch pad with multilayer waveguide |
EP1835464A1 (en) | 2006-03-14 | 2007-09-19 | GSF-Forschungszentrum für Umwelt und Gesundheit GmbH | Method of reconstructing an image function from radon data |
US8218154B2 (en) | 2006-03-30 | 2012-07-10 | Flatfrog Laboratories Ab | System and a method of determining a position of a scattering/reflecting element on the surface of a radiation transmissive element |
US7397418B1 (en) | 2006-06-05 | 2008-07-08 | Sandia Corporation | SAR image formation with azimuth interpolation after azimuth transform |
JP4891666B2 (en) | 2006-06-22 | 2012-03-07 | 東芝モバイルディスプレイ株式会社 | Liquid crystal display |
JP5320289B2 (en) | 2006-06-28 | 2013-10-23 | コーニンクレッカ フィリップス エヌ ヴェ | Method and apparatus for object learning and recognition based on optical parameters |
US8094136B2 (en) | 2006-07-06 | 2012-01-10 | Flatfrog Laboratories Ab | Optical touchpad with three-dimensional position determination |
US8031186B2 (en) | 2006-07-06 | 2011-10-04 | Flatfrog Laboratories Ab | Optical touchpad system and waveguide for use therein |
US20080007541A1 (en) | 2006-07-06 | 2008-01-10 | O-Pen A/S | Optical touchpad system and waveguide for use therein |
US7351949B2 (en) | 2006-07-10 | 2008-04-01 | Avago Technologies General Ip Pte Ltd | Optical generic switch panel |
US7394058B2 (en) | 2006-07-12 | 2008-07-01 | Agilent Technologies, Inc. | Touch screen with light-enhancing layer |
JP2009545828A (en) | 2006-08-03 | 2009-12-24 | パーセプティブ ピクセル,インク. | Multi-contact detection display device with total reflection interference |
EP2069889A2 (en) | 2006-08-03 | 2009-06-17 | France Telecom | Image capture and haptic input device |
US8144271B2 (en) | 2006-08-03 | 2012-03-27 | Perceptive Pixel Inc. | Multi-touch sensing through frustrated total internal reflection |
US8441467B2 (en) | 2006-08-03 | 2013-05-14 | Perceptive Pixel Inc. | Multi-touch sensing display through frustrated total internal reflection |
US8120239B2 (en) | 2006-08-16 | 2012-02-21 | Samsung Electronics Co., Ltd. | Infrared display with luminescent quantum dots |
US7969410B2 (en) | 2006-08-23 | 2011-06-28 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Optically detecting click events |
KR20080023832A (en) | 2006-09-12 | 2008-03-17 | 삼성전자주식회사 | Touch screen for mobile terminal and power saving method thereof |
CN101517521B (en) | 2006-09-13 | 2012-08-15 | 皇家飞利浦电子股份有限公司 | System for determining, and/or marking the orientation and/or identification of an object |
JP4842747B2 (en) | 2006-09-20 | 2011-12-21 | 株式会社リコー | Optical scanning apparatus, image forming apparatus, and color image forming apparatus |
WO2008034184A1 (en) | 2006-09-22 | 2008-03-27 | Rpo Pty Limited | Waveguide configurations for optical touch systems |
JP4567028B2 (en) | 2006-09-26 | 2010-10-20 | エルジー ディスプレイ カンパニー リミテッド | Liquid crystal display device having multi-touch sensing function and driving method thereof |
KR100782431B1 (en) | 2006-09-29 | 2007-12-05 | 주식회사 넥시오 | Multi position detecting method and area detecting method in infrared rays type touch screen |
US7369724B2 (en) | 2006-10-03 | 2008-05-06 | National Semiconductor Corporation | Apparatus and method for an improved lens structure for polymer wave guides which maximizes free space light coupling |
US9063617B2 (en) | 2006-10-16 | 2015-06-23 | Flatfrog Laboratories Ab | Interactive display system, tool for use with the system, and tool management apparatus |
US8269746B2 (en) | 2006-11-27 | 2012-09-18 | Microsoft Corporation | Communication with a touch screen |
US7924272B2 (en) | 2006-11-27 | 2011-04-12 | Microsoft Corporation | Infrared sensor integrated in a touch panel |
US8094129B2 (en) | 2006-11-27 | 2012-01-10 | Microsoft Corporation | Touch sensing using shadow and reflective modes |
US20100066704A1 (en) | 2006-11-30 | 2010-03-18 | Sega Corporation | Position input device |
EP2126673A4 (en) | 2006-12-08 | 2015-03-04 | Flatfrog Lab Ab | Position determination in optical interface systems |
TWM314487U (en) | 2006-12-20 | 2007-06-21 | Amtran Technology Co Ltd | Remote control having the audio-video function |
KR100833753B1 (en) | 2006-12-21 | 2008-05-30 | 삼성에스디아이 주식회사 | Organic light emitting diode display and driving method thereof |
JP4775247B2 (en) | 2006-12-21 | 2011-09-21 | 三菱電機株式会社 | Position detection device |
CN101211246B (en) | 2006-12-26 | 2010-06-23 | 乐金显示有限公司 | Organic light-emitting diode panel and touch-screen system including the same |
US8125455B2 (en) | 2007-01-03 | 2012-02-28 | Apple Inc. | Full scale calibration measurement for multi-touch surfaces |
JP2008181411A (en) | 2007-01-25 | 2008-08-07 | Nitto Denko Corp | Optical waveguide for touch panel |
TWM318760U (en) | 2007-01-26 | 2007-09-11 | Pixart Imaging Inc | Remote controller |
US20080189046A1 (en) | 2007-02-02 | 2008-08-07 | O-Pen A/S | Optical tool with dynamic electromagnetic radiation and a system and method for determining the position and/or motion of an optical tool |
US20080192025A1 (en) | 2007-02-13 | 2008-08-14 | Denny Jaeger | Touch input devices for display/sensor screen |
WO2008112146A2 (en) | 2007-03-07 | 2008-09-18 | The Trustees Of The University Of Pennsylvania | 2d partially parallel imaging with k-space surrounding neighbors based data reconstruction |
US8243048B2 (en) | 2007-04-25 | 2012-08-14 | Elo Touch Solutions, Inc. | Touchscreen for detecting multiple touches |
WO2008138049A1 (en) | 2007-05-11 | 2008-11-20 | Rpo Pty Limited | A transmissive body |
JP5336474B2 (en) * | 2007-05-20 | 2013-11-06 | スリーエム イノベイティブ プロパティズ カンパニー | Recyclable backlight with semi-specular components |
CN101334138A (en) | 2007-05-21 | 2008-12-31 | 罗门哈斯丹麦金融有限公司 | Mini lightbar illuminators for LCD displays |
US7936341B2 (en) | 2007-05-30 | 2011-05-03 | Microsoft Corporation | Recognizing selection regions from multiple simultaneous inputs |
NZ581463A (en) | 2007-05-30 | 2011-11-25 | Martin Pointing Devices | Touchpad controlling movement of a cursor on a computer display |
CN101075168B (en) | 2007-06-22 | 2014-04-02 | 北京汇冠新技术股份有限公司 | Method for discriminating multiple points on infrared touch screen |
JP4368392B2 (en) | 2007-06-13 | 2009-11-18 | 東海ゴム工業株式会社 | Deformation sensor system |
US7835999B2 (en) | 2007-06-27 | 2010-11-16 | Microsoft Corporation | Recognizing input gestures using a multi-touch input device, calculated graphs, and a neural network with link weights |
US9019245B2 (en) | 2007-06-28 | 2015-04-28 | Intel Corporation | Multi-function tablet pen input device |
EP2009541B1 (en) | 2007-06-29 | 2015-06-10 | Barco N.V. | Night vision touchscreen |
JP2009043636A (en) | 2007-08-10 | 2009-02-26 | Mitsubishi Electric Corp | Surface light source device and display device |
KR20100075460A (en) * | 2007-08-30 | 2010-07-02 | 넥스트 홀딩스 인코포레이티드 | Low profile touch panel systems |
US9335912B2 (en) | 2007-09-07 | 2016-05-10 | Apple Inc. | GUI applications for use with 3D remote controller |
US8231250B2 (en) | 2007-09-10 | 2012-07-31 | Lighting Science Group Corporation | Warm white lighting device |
US20090067178A1 (en) | 2007-09-11 | 2009-03-12 | Kismart Corporation | Method of forming light-scattering dots inside the diffusion plate and light guide plate by laser engraving |
US8122384B2 (en) | 2007-09-18 | 2012-02-21 | Palo Alto Research Center Incorporated | Method and apparatus for selecting an object within a user interface by performing a gesture |
US8395588B2 (en) | 2007-09-19 | 2013-03-12 | Canon Kabushiki Kaisha | Touch panel |
US8587559B2 (en) | 2007-09-28 | 2013-11-19 | Samsung Electronics Co., Ltd. | Multipoint nanostructure-film touch screen |
US8004502B2 (en) | 2007-10-05 | 2011-08-23 | Microsoft Corporation | Correcting for ambient light in an optical touch-sensitive device |
EP2212763A4 (en) | 2007-10-10 | 2012-06-20 | Flatfrog Lab Ab | A touch pad and a method of operating the touch pad |
US20100073318A1 (en) | 2008-09-24 | 2010-03-25 | Matsushita Electric Industrial Co., Ltd. | Multi-touch surface providing detection and tracking of multiple touch points |
CN100501657C (en) | 2007-11-05 | 2009-06-17 | 广东威创视讯科技股份有限公司 | Touch panel device and its locating method |
JP5082779B2 (en) | 2007-11-07 | 2012-11-28 | 株式会社日立製作所 | Flat panel display |
KR101407300B1 (en) | 2007-11-19 | 2014-06-13 | 엘지디스플레이 주식회사 | Multi touch flat display module |
CN101971128B (en) * | 2007-12-05 | 2013-07-17 | 阿尔梅瓦股份公司 | Interaction arrangement for interaction between a display screen and a pointer object |
WO2009078350A1 (en) | 2007-12-17 | 2009-06-25 | Nec Corporation | Input device, information terminal device provided with the same and input method |
AR064377A1 (en) | 2007-12-17 | 2009-04-01 | Rovere Victor Manuel Suarez | DEVICE FOR SENSING MULTIPLE CONTACT AREAS AGAINST OBJECTS SIMULTANEOUSLY |
US20090168459A1 (en) | 2007-12-27 | 2009-07-02 | Qualcomm Incorporated | Light guide including conjugate film |
US20090174679A1 (en) | 2008-01-04 | 2009-07-09 | Wayne Carl Westerman | Selective Rejection of Touch Contacts in an Edge Region of a Touch Surface |
US20090187842A1 (en) | 2008-01-22 | 2009-07-23 | 3Dlabs Inc., Ltd. | Drag and Drop User Interface for Portable Electronic Devices with Touch Sensitive Screens |
US9857915B2 (en) | 2008-01-25 | 2018-01-02 | Microsoft Technology Licensing, Llc | Touch sensing for curved displays |
EP2088500A1 (en) | 2008-02-11 | 2009-08-12 | Idean Enterprises Oy | Layer based user interface |
CN101971129A (en) | 2008-02-11 | 2011-02-09 | 奈克斯特控股有限公司 | Systems and methods for resolving multitouch scenarios for optical touchscreens |
CA2714534C (en) | 2008-02-28 | 2018-03-20 | Kenneth Perlin | Method and apparatus for providing input to a processor, and a sensor pad |
US9454256B2 (en) | 2008-03-14 | 2016-09-27 | Apple Inc. | Sensor configurations of an input device that are switchable based on mode |
WO2009126710A2 (en) | 2008-04-10 | 2009-10-15 | Perceptive Pixel, Inc. | Methods of interfacing with multi-input devices and multi-input display systems employing interfacing techniques |
US8745514B1 (en) | 2008-04-11 | 2014-06-03 | Perceptive Pixel, Inc. | Pressure-sensitive layering of displayed objects |
TW200945123A (en) | 2008-04-25 | 2009-11-01 | Ind Tech Res Inst | A multi-touch position tracking apparatus and interactive system and image processing method there of |
WO2009137355A2 (en) | 2008-05-06 | 2009-11-12 | Next Holdings, Inc. | Systems and methods for resolving multitouch scenarios using software filters |
US8830181B1 (en) | 2008-06-01 | 2014-09-09 | Cypress Semiconductor Corporation | Gesture recognition system for a touch-sensing surface |
US8676007B2 (en) | 2008-06-19 | 2014-03-18 | Neonode Inc. | Light-based touch surface with curved borders and sloping bezel |
TW201005606A (en) | 2008-06-23 | 2010-02-01 | Flatfrog Lab Ab | Detecting the locations of a plurality of objects on a touch surface |
TW201013492A (en) | 2008-06-23 | 2010-04-01 | Flatfrog Lab Ab | Determining the location of one or more objects on a touch surface |
US8542217B2 (en) | 2008-06-23 | 2013-09-24 | Flatfrog Laboratories Ab | Optical touch detection using input and output beam scanners |
TW201007530A (en) | 2008-06-23 | 2010-02-16 | Flatfrog Lab Ab | Detecting the location of an object on a touch surface |
TW201001258A (en) | 2008-06-23 | 2010-01-01 | Flatfrog Lab Ab | Determining the location of one or more objects on a touch surface |
CN101644854A (en) | 2008-08-04 | 2010-02-10 | 鸿富锦精密工业(深圳)有限公司 | Direct backlight module |
CN201233592Y (en) | 2008-08-05 | 2009-05-06 | 北京汇冠新技术有限公司 | Reflective light path construction used for infrared touch screen |
JP5003629B2 (en) | 2008-08-06 | 2012-08-15 | パナソニック株式会社 | Information terminal equipment |
US9063615B2 (en) | 2008-08-07 | 2015-06-23 | Rapt Ip Limited | Detecting multitouch events in an optical touch-sensitive device using line images |
US9092092B2 (en) | 2008-08-07 | 2015-07-28 | Rapt Ip Limited | Detecting multitouch events in an optical touch-sensitive device using touch event templates |
KR101554606B1 (en) | 2008-08-07 | 2015-10-06 | 랩트 아이피 리미티드 | Optical control systems with modulated emitters |
CN102177492B (en) | 2008-08-07 | 2014-08-13 | 拉普特知识产权公司 | Optical control systems with feedback control |
US8350831B2 (en) | 2008-08-07 | 2013-01-08 | Rapt Ip Limited | Method and apparatus for detecting a multitouch event in an optical touch-sensitive device |
US8188986B2 (en) | 2008-09-23 | 2012-05-29 | Avago Technologies Ecbu Ip (Singapore) Pte. Ltd. | User input device with dynamic ambient light calibration |
US8237684B2 (en) | 2008-09-26 | 2012-08-07 | Avago Technologies Ecbu Ip (Singapore) Pte. Ltd. | User input device with planar light guide illumination plate |
US8093545B2 (en) | 2008-09-26 | 2012-01-10 | Avago Technologies Ecbu Ip (Singapore) Pte. Ltd. | Lensless user input device with optical interference based on diffraction with a small aperture |
US9317159B2 (en) | 2008-09-26 | 2016-04-19 | Hewlett-Packard Development Company, L.P. | Identifying actual touch points using spatial dimension information obtained from light transceivers |
EP2353069B1 (en) | 2008-10-02 | 2013-07-03 | Next Holdings Limited | Stereo optical sensors for resolving multi-touch in a touch detection system |
KR100972932B1 (en) | 2008-10-16 | 2010-07-28 | 인하대학교 산학협력단 | Touch Screen Panel |
KR101323045B1 (en) | 2008-10-21 | 2013-10-29 | 엘지디스플레이 주식회사 | Sensing deving and method for amplifying output thereof |
KR101542129B1 (en) | 2008-10-24 | 2015-08-06 | 삼성전자 주식회사 | Input Device For Foldable Display Device And Input Method Thereof |
FI121862B (en) | 2008-10-24 | 2011-05-13 | Valtion Teknillinen | Arrangement for touch screen and corresponding manufacturing method |
EP2356551A4 (en) | 2008-11-12 | 2012-05-02 | Flatfrog Lab Ab | Integrated touch-sensing display apparatus and method of operating the same |
US20100125438A1 (en) | 2008-11-15 | 2010-05-20 | Mathieu Audet | Method of scanning, analyzing and identifying electro magnetic field sources |
KR100940435B1 (en) | 2008-11-26 | 2010-02-10 | 한국광기술원 | Two dimensional optical fiber scanning module, optical fiber scanning system having the same and optical fiber scanning method |
SE533704C2 (en) | 2008-12-05 | 2010-12-07 | Flatfrog Lab Ab | Touch sensitive apparatus and method for operating the same |
US8317352B2 (en) | 2008-12-11 | 2012-11-27 | Robert Saccomanno | Non-invasive injection of light into a transparent substrate, such as a window pane through its face |
JP5239835B2 (en) | 2008-12-24 | 2013-07-17 | 富士ゼロックス株式会社 | Optical waveguide and optical waveguide type touch panel |
US8407606B1 (en) | 2009-01-02 | 2013-03-26 | Perceptive Pixel Inc. | Allocating control among inputs concurrently engaging an object displayed on a multi-touch device |
WO2010081702A2 (en) | 2009-01-14 | 2010-07-22 | Citron Gmbh | Multitouch control panel |
US20130181896A1 (en) | 2009-01-23 | 2013-07-18 | Qualcomm Mems Technologies, Inc. | Integrated light emitting and light detecting device |
US8138479B2 (en) | 2009-01-23 | 2012-03-20 | Qualcomm Mems Technologies, Inc. | Integrated light emitting and light detecting device |
US8487914B2 (en) | 2009-06-18 | 2013-07-16 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Optical fingerprint navigation device with light guide film |
JP5370374B2 (en) | 2009-02-13 | 2013-12-18 | 富士通モバイルコミュニケーションズ株式会社 | Information processing device |
US9063614B2 (en) | 2009-02-15 | 2015-06-23 | Neonode Inc. | Optical touch screens |
US9158416B2 (en) * | 2009-02-15 | 2015-10-13 | Neonode Inc. | Resilient light-based touch surface |
DE102010000473A1 (en) | 2009-02-20 | 2010-08-26 | Werth Messtechnik Gmbh | Method for measuring an object |
US8331751B2 (en) | 2009-03-02 | 2012-12-11 | mBio Diagnositcs, Inc. | Planar optical waveguide with core of low-index-of-refraction interrogation medium |
JP5269648B2 (en) | 2009-03-02 | 2013-08-21 | パナソニック株式会社 | Portable terminal device and input device |
US20110316005A1 (en) | 2009-03-06 | 2011-12-29 | Sharp Kabushiki Kaisha | Display apparatus |
TWI399677B (en) | 2009-03-31 | 2013-06-21 | Arima Lasers Corp | Optical detection apparatus and method |
TWI524238B (en) | 2009-03-31 | 2016-03-01 | 萬國商業機器公司 | Multi-touch optical touch panel |
JP5146389B2 (en) | 2009-04-03 | 2013-02-20 | ソニー株式会社 | Information processing apparatus and estimation method |
US8648826B2 (en) | 2009-04-17 | 2014-02-11 | Sharp Kabushiki Kaisha | Display device |
US8455904B2 (en) | 2009-04-20 | 2013-06-04 | 3M Innovative Properties Company | Non-radiatively pumped wavelength converter |
FI124221B (en) | 2009-04-24 | 2014-05-15 | Valtion Teknillinen | User Feed Arrangement and Related Production Method |
US20100277436A1 (en) | 2009-04-29 | 2010-11-04 | Hong Kong Applied Science And Technology Research Institute Co., Ltd. | Sensing System for a Touch Sensitive Device |
EP2424438A4 (en) | 2009-04-30 | 2013-04-03 | Univ California | System and methods for fast implementation of equally-sloped tomography |
JP2010281808A (en) * | 2009-05-01 | 2010-12-16 | Konica Minolta Sensing Inc | Illumination apparatus and reflective characteristic measuring apparatus employing the same |
US20100283785A1 (en) | 2009-05-11 | 2010-11-11 | Agilent Technologies, Inc. | Detecting peaks in two-dimensional signals |
US8154529B2 (en) | 2009-05-14 | 2012-04-10 | Atmel Corporation | Two-dimensional touch sensors |
US20120068973A1 (en) | 2009-05-18 | 2012-03-22 | Flatfrog Laboratories Ab | Determining The Location Of An Object On A Touch Surface |
WO2010134899A1 (en) | 2009-05-20 | 2010-11-25 | Tom Chang | Optical touch panel |
US20100315379A1 (en) | 2009-05-22 | 2010-12-16 | Matthew Allard | Display Devices With Integrated Optical Components For Use in Position Detection |
US8358901B2 (en) | 2009-05-28 | 2013-01-22 | Microsoft Corporation | Optic having a cladding |
WO2010141453A2 (en) | 2009-06-01 | 2010-12-09 | Han Jefferson Y | Touch sensing |
US8736581B2 (en) | 2009-06-01 | 2014-05-27 | Perceptive Pixel Inc. | Touch sensing with frustrated total internal reflection |
TWI414974B (en) | 2009-06-17 | 2013-11-11 | Novatek Microelectronics Corp | Touch position sensing method and position sensing system of touch panel |
WO2010149651A1 (en) | 2009-06-23 | 2010-12-29 | Imec | Optical tactile sensors |
TWI420371B (en) | 2009-06-23 | 2013-12-21 | Raydium Semiconductor Corportation | Optical touch system and operating method thereof |
CN201437963U (en) | 2009-07-07 | 2010-04-14 | 台湾奈普光电科技股份有限公司 | Structural improvement for light guide plate |
US9323398B2 (en) * | 2009-07-10 | 2016-04-26 | Apple Inc. | Touch and hover sensing |
WO2011006500A1 (en) | 2009-07-16 | 2011-01-20 | Opdi Technologies A/S | A device, a system and a method of encoding a position of an object |
CN201465071U (en) | 2009-07-20 | 2010-05-12 | 贺伟 | Infrared touch screen frame structure |
US8730212B2 (en) | 2009-08-21 | 2014-05-20 | Microsoft Corporation | Illuminator for touch- and object-sensitive display |
KR100941927B1 (en) | 2009-08-21 | 2010-02-18 | 이성호 | Method and device for detecting touch input |
GB2486843B (en) | 2009-08-25 | 2014-06-18 | Promethean Ltd | Interactive surface with a plurality of input detection technologies |
US7932899B2 (en) | 2009-09-01 | 2011-04-26 | Next Holdings Limited | Determining the location of touch points in a position detection system |
SE534244C2 (en) | 2009-09-02 | 2011-06-14 | Flatfrog Lab Ab | Touch sensitive system and method for functional control thereof |
EP2473905A4 (en) | 2009-09-02 | 2014-07-09 | Flatfrog Lab Ab | Touch surface with a compensated signal profile |
EP2476047A1 (en) | 2009-09-11 | 2012-07-18 | FlatFrog Laboratories AB | Touch surface with variable refractive index |
KR101606883B1 (en) | 2009-09-18 | 2016-04-12 | 삼성디스플레이 주식회사 | Touch sensing apparatus |
KR20110032640A (en) | 2009-09-23 | 2011-03-30 | 삼성전자주식회사 | Multi-touch sensing display apparatus |
DE102009042922B4 (en) | 2009-09-24 | 2019-01-24 | Siemens Healthcare Gmbh | Method and apparatus for image determination from x-ray projections taken when traversing a trajectory |
US8749512B2 (en) | 2009-09-30 | 2014-06-10 | Apple Inc. | Negative pixel compensation |
US20110080344A1 (en) | 2009-10-02 | 2011-04-07 | Dedo Interactive Inc. | Blending touch data streams that include touch input data |
US8373679B2 (en) | 2009-10-12 | 2013-02-12 | Garmin International, Inc. | Infrared touchscreen electronics |
US20120200538A1 (en) | 2009-10-19 | 2012-08-09 | Flatfrog Laboratories Ab | Touch surface with two-dimensional compensation |
RU2012118595A (en) | 2009-10-19 | 2013-11-27 | ФлэтФрог Лэборэторис АБ | RETRIEVING TOUCH DATA REPRESENTING ONE OR SEVERAL ITEMS ON A TOUCH SURFACE |
KR20120083915A (en) | 2009-10-19 | 2012-07-26 | 플라트프로그 라보라토리즈 에이비 | Determining touch data for one or more objects on a touch surface |
JP5483996B2 (en) | 2009-10-23 | 2014-05-07 | キヤノン株式会社 | Compensating optical device, imaging device, and compensating optical method |
CN201927010U (en) | 2009-11-12 | 2011-08-10 | 北京汇冠新技术股份有限公司 | Touch screen, touch system and light source |
US9280237B2 (en) | 2009-11-17 | 2016-03-08 | Zetta Research and Development LLC—RPO Series | Apparatus and method for receiving a touch input |
US20110115748A1 (en) | 2009-11-18 | 2011-05-19 | Amlogic Co., Ltd. | Infrared Touch Screen |
KR101627715B1 (en) * | 2009-11-18 | 2016-06-14 | 엘지전자 주식회사 | Touch Panel, Driving Method for Touch Panel, and Display Apparatus having a Touch Panel |
TWI425396B (en) | 2009-11-25 | 2014-02-01 | Coretronic Corp | Optical touch apparatus and optical touch display apparatus |
US8436833B2 (en) | 2009-11-25 | 2013-05-07 | Corning Incorporated | Methods and apparatus for sensing touch events on a display |
TWM379163U (en) | 2009-11-26 | 2010-04-21 | Truelight Corp | Packaging apparatus for high power and high orientation matrix semiconductor light-emitting devices |
GB0921216D0 (en) | 2009-12-03 | 2010-01-20 | St Microelectronics Res & Dev | Improved touch screen device |
US20110205186A1 (en) | 2009-12-04 | 2011-08-25 | John David Newton | Imaging Methods and Systems for Position Detection |
US8120027B2 (en) * | 2009-12-10 | 2012-02-21 | Leonard Forbes | Backside nanoscale texturing to improve IR response of silicon solar cells and photodetectors |
KR101835448B1 (en) | 2009-12-11 | 2018-03-08 | 애버리 데니슨 코포레이션 | Position sensing systems for use in touch screens and prismatic film used therein |
CN102096526B (en) | 2009-12-15 | 2015-11-25 | 乐金显示有限公司 | The display device of optical sensing unit, display module and use optical sensing unit |
EP2515216B1 (en) | 2009-12-16 | 2019-06-05 | Beijing Irtouch Systems Co., Ltd. | Infrared touch screen |
US20120256882A1 (en) | 2009-12-21 | 2012-10-11 | Flatfrog Laboratories Ab | Touch surface with identification of reduced performance |
KR101579091B1 (en) | 2010-01-07 | 2015-12-22 | 삼성디스플레이 주식회사 | Method for detecting touch position, detecting apparatus of touch position for performing the method and display apparatus having the detecting apparatus of touch position |
US8502789B2 (en) | 2010-01-11 | 2013-08-06 | Smart Technologies Ulc | Method for handling user input in an interactive input system, and interactive input system executing the method |
KR101704695B1 (en) * | 2010-03-09 | 2017-02-09 | 삼성디스플레이 주식회사 | Method for detecting touch position, detecting apparatus of touch position for performing the method and display apparatus having the detecting apparatus of touch position |
FR2957718B1 (en) | 2010-03-16 | 2012-04-20 | Commissariat Energie Atomique | HYBRID HIGH PERFORMANCE ELECTROLUMINESCENT DIODE |
KR101749266B1 (en) | 2010-03-24 | 2017-07-04 | 삼성디스플레이 주식회사 | Touch sensing display device and cumputer-readable medium |
CN101930322B (en) | 2010-03-26 | 2012-05-23 | 深圳市天时通科技有限公司 | Identification method capable of simultaneously identifying a plurality of contacts of touch screen |
JP2011227574A (en) | 2010-04-15 | 2011-11-10 | Rohm Co Ltd | Arithmetic apparatus, motion detecting apparatus, electronic device |
WO2011130919A1 (en) | 2010-04-23 | 2011-10-27 | Motorola Mobility, Inc. | Electronic device and method using touch-detecting surface |
JP5523191B2 (en) | 2010-04-30 | 2014-06-18 | 株式会社ジャパンディスプレイ | Display device with touch detection function |
TW201203052A (en) | 2010-05-03 | 2012-01-16 | Flatfrog Lab Ab | Touch determination by tomographic reconstruction |
US8274495B2 (en) | 2010-05-25 | 2012-09-25 | General Display, Ltd. | System and method for contactless touch screen |
US8294168B2 (en) | 2010-06-04 | 2012-10-23 | Samsung Electronics Co., Ltd. | Light source module using quantum dots, backlight unit employing the light source module, display apparatus, and illumination apparatus |
US9158401B2 (en) | 2010-07-01 | 2015-10-13 | Flatfrog Laboratories Ab | Data processing in relation to a multi-touch sensing apparatus |
CN102339168B (en) | 2010-07-21 | 2013-10-16 | 北京汇冠新技术股份有限公司 | Touch screen and multi-channel sampling method thereof |
US20120019448A1 (en) | 2010-07-22 | 2012-01-26 | Nokia Corporation | User Interface with Touch Pressure Level Sensing |
CN101882034B (en) | 2010-07-23 | 2013-02-13 | 广东威创视讯科技股份有限公司 | Device and method for discriminating color of touch pen of touch device |
US8648970B2 (en) | 2010-08-02 | 2014-02-11 | Chip Goal Electronics Corporation, Roc | Remote controllable video display system and controller and method therefor |
KR20120012571A (en) | 2010-08-02 | 2012-02-10 | 엘지이노텍 주식회사 | Optical touch screen and method for assembling the same |
US9092089B2 (en) | 2010-09-15 | 2015-07-28 | Advanced Silicon Sa | Method for detecting an arbitrary number of touches from a multi-touch device |
EP2628068A4 (en) | 2010-10-11 | 2014-02-26 | Flatfrog Lab Ab | Touch determination by tomographic reconstruction |
TWI422908B (en) | 2010-10-12 | 2014-01-11 | Au Optronics Corp | Touch display device |
US9360959B2 (en) | 2010-10-12 | 2016-06-07 | Tactonic Technologies, Llc | Fusing depth and pressure imaging to provide object identification for multi-touch surfaces |
US8654064B2 (en) | 2010-10-18 | 2014-02-18 | Samsung Display Co., Ltd. | Backlight having blue light emitting diodes and method of driving same |
US9092135B2 (en) | 2010-11-01 | 2015-07-28 | Sony Computer Entertainment Inc. | Control of virtual object using device touch interface functionality |
US20130234991A1 (en) | 2010-11-07 | 2013-09-12 | Neonode Inc. | Optimized hemi-ellipsoidal led shell |
US20120131490A1 (en) | 2010-11-22 | 2012-05-24 | Shao-Chieh Lin | Touch-controlled device and method for displaying a virtual keyboard on the touch-controlled device thereof |
US8503753B2 (en) | 2010-12-02 | 2013-08-06 | Kabushiki Kaisha Toshiba | System and method for triangular interpolation in image reconstruction for PET |
KR101778127B1 (en) * | 2010-12-14 | 2017-09-13 | 엘지전자 주식회사 | Touch Panel and Display Apparatus having a Touch Panel |
US9274645B2 (en) | 2010-12-15 | 2016-03-01 | Flatfrog Laboratories Ab | Touch determination with signal enhancement |
EP2466429A1 (en) | 2010-12-16 | 2012-06-20 | FlatFrog Laboratories AB | Scanning ftir systems for touch detection |
EP2466428A3 (en) | 2010-12-16 | 2015-07-29 | FlatFrog Laboratories AB | Touch apparatus with separated compartments |
US8546741B2 (en) | 2011-01-13 | 2013-10-01 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Compact optical finger navigation system based on speckles with an optical element including an optical redirection surface |
EP2479642B1 (en) | 2011-01-21 | 2017-08-16 | BlackBerry Limited | System and method for reducing power consumption in an electronic device having a touch-sensitive display |
US8635560B2 (en) | 2011-01-21 | 2014-01-21 | Blackberry Limited | System and method for reducing power consumption in an electronic device having a touch-sensitive display |
KR101942114B1 (en) | 2011-02-02 | 2019-01-24 | 플라트프로그 라보라토리즈 에이비 | Optical incoupling for touch-sensitive systems |
US8619062B2 (en) | 2011-02-03 | 2013-12-31 | Microsoft Corporation | Touch-pressure sensing in a display panel |
US9201520B2 (en) | 2011-02-11 | 2015-12-01 | Microsoft Technology Licensing, Llc | Motion and context sharing for pen-based computing inputs |
US8624858B2 (en) | 2011-02-14 | 2014-01-07 | Blackberry Limited | Portable electronic device including touch-sensitive display and method of controlling same |
US8912905B2 (en) | 2011-02-28 | 2014-12-16 | Chon Meng Wong | LED lighting system |
WO2012121652A1 (en) | 2011-03-09 | 2012-09-13 | Flatfrog Laboratories Ab | Touch determination with signal compensation |
TW201239710A (en) | 2011-03-29 | 2012-10-01 | Genius Electronic Optical Co Ltd | Optical touch system |
EP2699990A4 (en) | 2011-04-19 | 2015-01-21 | Perceptive Pixel Inc | Optical filtered sensor-in-pixel technology for touch sensing |
US8558788B2 (en) | 2011-04-29 | 2013-10-15 | Hewlett-Packard Development Company, L.P. | Diffusing light of a laser |
KR101888222B1 (en) | 2011-05-13 | 2018-08-13 | 쓰리엠 이노베이티브 프로퍼티즈 컴파니 | Back-lit transmissive display having variable index light extraction layer |
US20140085241A1 (en) | 2011-05-16 | 2014-03-27 | Flatfrog Laboratories Ab | Device and method for determining reduced performance of a touch sensitive apparatus |
US9001086B1 (en) | 2011-06-08 | 2015-04-07 | Amazon Technologies, Inc. | Display illumination with light-based touch sensing |
CA2873832C (en) | 2011-06-15 | 2018-12-04 | Baanto International Ltd. | Mounting systems for modular position sensing systems |
GB201110218D0 (en) | 2011-06-16 | 2011-08-03 | St Microelectronics Res & Dev | Optical navigation device |
JP5453351B2 (en) | 2011-06-24 | 2014-03-26 | 株式会社Nttドコモ | Mobile information terminal, operation state determination method, program |
US8963886B2 (en) | 2011-07-13 | 2015-02-24 | Flatfrog Laboratories Ab | Touch-sensing display panel |
US8884900B2 (en) | 2011-07-13 | 2014-11-11 | Flatfrog Laboratories Ab | Touch-sensing display apparatus and electronic device therewith |
WO2013014534A2 (en) | 2011-07-22 | 2013-01-31 | Owen Drumm | Optical coupler for use in an optical touch sensitive device |
US9075561B2 (en) | 2011-07-29 | 2015-07-07 | Apple Inc. | Systems, methods, and computer-readable media for managing collaboration on a virtual work of art |
US20140300572A1 (en) | 2011-08-10 | 2014-10-09 | Flatfrog Laboratories Ab | Touch determination by tomographic reconstruction |
US8959435B2 (en) | 2011-08-23 | 2015-02-17 | Garmin Switzerland Gmbh | System and methods for detecting debris on a touchscreen system display screen |
KR101862123B1 (en) | 2011-08-31 | 2018-05-30 | 삼성전자 주식회사 | Input device and method on terminal equipment having a touch module |
WO2013036192A1 (en) | 2011-09-09 | 2013-03-14 | Flatfrog Laboratories Ab | Light coupling structures for optical touch panels |
TW201329821A (en) | 2011-09-27 | 2013-07-16 | Flatfrog Lab Ab | Image reconstruction for touch determination |
US9019240B2 (en) | 2011-09-29 | 2015-04-28 | Qualcomm Mems Technologies, Inc. | Optical touch device with pixilated light-turning features |
TW201333787A (en) | 2011-10-11 | 2013-08-16 | Flatfrog Lab Ab | Improved multi-touch detection in a touch system |
US20130106709A1 (en) | 2011-10-28 | 2013-05-02 | Martin John Simmons | Touch Sensor With User Identification |
JP5846631B2 (en) | 2011-11-02 | 2016-01-20 | 株式会社エンプラス | Light guide plate and optical system including the same |
US9582178B2 (en) | 2011-11-07 | 2017-02-28 | Immersion Corporation | Systems and methods for multi-pressure interaction on touch-sensitive surfaces |
US20130125016A1 (en) | 2011-11-11 | 2013-05-16 | Barnesandnoble.Com Llc | System and method for transferring content between devices |
WO2013081894A1 (en) | 2011-11-28 | 2013-06-06 | Corning Incorporated | Optical touch-screen systems and methods using a planar transparent sheet |
CN104160366A (en) | 2011-11-28 | 2014-11-19 | 康宁股份有限公司 | Robust optical touch-screen systems and methods using a planar transparent sheet |
US9823781B2 (en) | 2011-12-06 | 2017-11-21 | Nri R&D Patent Licensing, Llc | Heterogeneous tactile sensing via multiple sensor types |
US9927920B2 (en) | 2011-12-16 | 2018-03-27 | Flatfrog Laboratories Ab | Tracking objects on a touch surface |
EP2791763B1 (en) | 2011-12-16 | 2018-10-31 | FlatFrog Laboratories AB | Tracking objects on a touch surface |
US8982084B2 (en) | 2011-12-16 | 2015-03-17 | Flatfrog Laboratories Ab | Tracking objects on a touch surface |
WO2013090709A1 (en) | 2011-12-16 | 2013-06-20 | Hospira, Inc. | System for monitoring and delivering medication to a patient and method of using the same to minimize the risks associated with automated therapy |
US9711752B2 (en) | 2011-12-19 | 2017-07-18 | Lg Electronics Inc. | Display apparatus |
JP5296185B2 (en) | 2011-12-21 | 2013-09-25 | シャープ株式会社 | Touch sensor system |
EP2795437A4 (en) | 2011-12-22 | 2015-07-15 | Flatfrog Lab Ab | Touch determination with interaction compensation |
US20130181953A1 (en) | 2012-01-13 | 2013-07-18 | Microsoft Corporation | Stylus computing environment |
US9250794B2 (en) | 2012-01-23 | 2016-02-02 | Victor Manuel SUAREZ ROVERE | Method and apparatus for time-varying tomographic touch imaging and interactive system using same |
US9588619B2 (en) | 2012-01-31 | 2017-03-07 | Flatfrog Laboratories Ab | Performance monitoring and correction in a touch-sensitive apparatus |
EP2817696A4 (en) | 2012-02-21 | 2015-09-30 | Flatfrog Lab Ab | Touch determination with improved detection of weak interactions |
TWI439907B (en) | 2012-02-29 | 2014-06-01 | Pixart Imaging Inc | Optical touch device and detection method thereof |
TW201403493A (en) | 2012-03-09 | 2014-01-16 | Flatfrog Lab Ab | Efficient tomographic processing for touch determination |
EP2823382B1 (en) | 2012-03-09 | 2018-10-03 | FlatFrog Laboratories AB | Efficient tomographic processing for touch determination |
US9542045B2 (en) | 2012-03-14 | 2017-01-10 | Texas Instruments Incorporated | Detecting and tracking touch on an illuminated surface using a mean-subtracted image |
US8928590B1 (en) | 2012-04-03 | 2015-01-06 | Edge 3 Technologies, Inc. | Gesture keyboard method and apparatus |
US9448066B2 (en) | 2012-04-17 | 2016-09-20 | Massachusetts Institute Of Technology | Methods and apparatus for jammable HCI interfaces |
US9904457B2 (en) | 2012-04-25 | 2018-02-27 | Nokia Technologies Oy | Causing display of a three dimensional graphical user interface with dynamic selectability of items |
CN102662534A (en) | 2012-04-27 | 2012-09-12 | 深圳市天时通科技有限公司 | Touch display device |
WO2013165305A2 (en) | 2012-05-02 | 2013-11-07 | Flatfrog Laboratories Ab | Object detection in touch systems |
US9626018B2 (en) | 2012-05-02 | 2017-04-18 | Flatfrog Laboratories Ab | Object detection in touch systems |
JP5943699B2 (en) | 2012-05-11 | 2016-07-05 | スタンレー電気株式会社 | Optical touch panel |
KR101319543B1 (en) | 2012-05-17 | 2013-10-21 | 삼성디스플레이 주식회사 | Curved dispaly apparatus and multi display apparatus including the same |
WO2013176613A2 (en) | 2012-05-23 | 2013-11-28 | Flatfrog Laboratories Ab | Touch-sensitive apparatus with improved spatial resolution |
WO2013176614A2 (en) | 2012-05-23 | 2013-11-28 | Flatfrog Laboratories Ab | Touch-sensitive apparatus with improved spatial resolution |
US9626040B2 (en) | 2012-05-23 | 2017-04-18 | Flatfrog Laboratories Ab | Touch-sensitive apparatus with improved spatial resolution |
US10168835B2 (en) | 2012-05-23 | 2019-01-01 | Flatfrog Laboratories Ab | Spatial resolution in touch displays |
US9524060B2 (en) | 2012-07-13 | 2016-12-20 | Rapt Ip Limited | Low power operation of an optical touch-sensitive device for detecting multitouch events |
US9405382B2 (en) | 2012-07-24 | 2016-08-02 | Rapt Ip Limited | Augmented optical waveguide for use in an optical touch sensitive device |
US9857916B2 (en) | 2012-07-24 | 2018-01-02 | Flatfrog Laboratories Ab | Optical coupling in touch-sensing systems using diffusively transmitting element |
US9886116B2 (en) | 2012-07-26 | 2018-02-06 | Apple Inc. | Gesture and touch input detection through force sensing |
US20140036203A1 (en) | 2012-07-31 | 2014-02-06 | Apple Inc. | Light mixture for a display utilizing quantum dots |
US9317146B1 (en) | 2012-08-23 | 2016-04-19 | Rockwell Collins, Inc. | Haptic touch feedback displays having double bezel design |
US20140063853A1 (en) | 2012-08-29 | 2014-03-06 | Flex Lighting Ii, Llc | Film-based lightguide including a wrapped stack of input couplers and light emitting device including the same |
CN104662496B (en) | 2012-09-11 | 2017-07-07 | 平蛙实验室股份公司 | Touch force in the projection type touch-sensing device based on FTIR is estimated |
CN202771401U (en) | 2012-09-18 | 2013-03-06 | 北京汇冠新技术股份有限公司 | Infrared touch screen |
US9891759B2 (en) | 2012-09-28 | 2018-02-13 | Apple Inc. | Frustrated total internal reflection and capacitive sensing |
US9557846B2 (en) | 2012-10-04 | 2017-01-31 | Corning Incorporated | Pressure-sensing touch system utilizing optical and capacitive systems |
US20140210770A1 (en) | 2012-10-04 | 2014-07-31 | Corning Incorporated | Pressure sensing touch systems and methods |
US9229576B2 (en) | 2012-10-09 | 2016-01-05 | Stmicroelectronics Asia Pacific Pte Ltd | Apparatus and method for preventing false touches in touch screen systems |
CN203224848U (en) | 2012-10-11 | 2013-10-02 | 华映视讯(吴江)有限公司 | Touch control display module |
US9207800B1 (en) * | 2014-09-23 | 2015-12-08 | Neonode Inc. | Integrated light guide and touch screen frame and multi-touch determination method |
US8694791B1 (en) | 2012-10-15 | 2014-04-08 | Google Inc. | Transitioning between access states of a computing device |
CN104756176B (en) | 2012-10-25 | 2017-12-08 | Lg电子株式会社 | Display device |
US20140139467A1 (en) | 2012-11-21 | 2014-05-22 | Princeton Optronics Inc. | VCSEL Sourced Touch Screen Sensor Systems |
KR101690205B1 (en) | 2012-11-30 | 2016-12-27 | 랩트 아이피 리미티드 | Optical Touch Tomography |
WO2014086084A1 (en) | 2012-12-05 | 2014-06-12 | 成都吉锐触摸技术股份有限公司 | Infrared touch screen |
US20140160762A1 (en) | 2012-12-07 | 2014-06-12 | GE Lighting Solutions, LLC | Diffuser element and lighting device comprised thereof |
US10268319B2 (en) | 2012-12-17 | 2019-04-23 | Flatfrog Laboratories Ab | Edge-coupled touch-sensitive apparatus |
WO2014098741A1 (en) | 2012-12-17 | 2014-06-26 | Flatfrog Laboratories Ab | Laminated optical element for touch-sensing systems |
WO2014098743A1 (en) | 2012-12-17 | 2014-06-26 | Flatfrog Laboratories Ab | Optical coupling in touch-sensing systems |
US20150324028A1 (en) | 2012-12-17 | 2015-11-12 | Flatfrog Laboratories Ab | Optical coupling of light into touch-sensing systems |
EP2936221A4 (en) | 2012-12-20 | 2016-08-31 | Flatfrog Lab Ab | Improvements in tir-based optical touch systems of projection-type |
WO2014104967A1 (en) | 2012-12-27 | 2014-07-03 | Flatfrog Laboratories Ab | Method and apparatus for detecting visible ambient light |
WO2014104968A1 (en) | 2012-12-27 | 2014-07-03 | Flatfrog Laboratories Ab | A touch-sensing apparatus and a method for enabling control of a touch-sensing apparatus by an external device |
WO2014112913A1 (en) | 2013-01-16 | 2014-07-24 | Flatfrog Laboratories Ab | Touch-sensing display panel |
US9760227B2 (en) | 2013-01-30 | 2017-09-12 | Fujian Kechuang Photoelectric Co., Ltd. | OGS captive touch panel and method for manufacturing same |
KR20140101166A (en) | 2013-02-08 | 2014-08-19 | 엘지전자 주식회사 | Display apparatus |
US20140237401A1 (en) | 2013-02-15 | 2014-08-21 | Flatfrog Laboratories Ab | Interpretation of a gesture on a touch sensing device |
US20140237408A1 (en) | 2013-02-15 | 2014-08-21 | Flatfrog Laboratories Ab | Interpretation of pressure based gesture |
US9910527B2 (en) | 2013-02-15 | 2018-03-06 | Flatfrog Laboratories Ab | Interpretation of pressure based gesture |
US20140237422A1 (en) | 2013-02-15 | 2014-08-21 | Flatfrog Laboratories Ab | Interpretation of pressure based gesture |
CN203189466U (en) | 2013-03-10 | 2013-09-11 | 常州市龙春针织机械科技有限公司 | Axial locking device |
KR102052977B1 (en) | 2013-03-11 | 2019-12-06 | 삼성전자 주식회사 | Multi Input Control Method and System thereof, and Electronic Device supporting the same |
US9785259B2 (en) | 2013-03-11 | 2017-10-10 | Barnes & Noble College Booksellers, Llc | Stylus-based slider functionality for UI control of computing device |
KR20140114913A (en) * | 2013-03-14 | 2014-09-30 | 삼성전자주식회사 | Apparatus and Method for operating sensors in user device |
US9158411B2 (en) | 2013-07-12 | 2015-10-13 | Tactual Labs Co. | Fast multi-touch post processing |
JP6288073B2 (en) | 2013-03-18 | 2018-03-07 | ソニー株式会社 | Sensor device, input device and electronic device |
EP3591505B1 (en) | 2013-04-07 | 2023-12-27 | Guangzhou Shirui Electronics Co., Ltd. | All-in-one machine for realizing quick touch in all channels thereof |
WO2014168569A1 (en) | 2013-04-11 | 2014-10-16 | Flatfrog Laboratories Ab | A coupling arrangement, a panel and a touch sensitive system |
US20160050746A1 (en) | 2013-04-11 | 2016-02-18 | Flatfrog Laboratories Ab | Printed Circuit Assembly And A Touch Sensitive System Comprising The Assembly |
WO2014168567A1 (en) | 2013-04-11 | 2014-10-16 | Flatfrog Laboratories Ab | Tomographic processing for touch detection |
US10187520B2 (en) | 2013-04-24 | 2019-01-22 | Samsung Electronics Co., Ltd. | Terminal device and content displaying method thereof, server and controlling method thereof |
JP5872738B2 (en) | 2013-05-21 | 2016-03-01 | シャープ株式会社 | Touch panel system and electronic device |
WO2014194944A1 (en) | 2013-06-05 | 2014-12-11 | Ev Group E. Thallner Gmbh | Measuring device and method for ascertaining a pressure map |
US9367177B2 (en) * | 2013-06-27 | 2016-06-14 | Hong Kong Applied Science and Technology Research Institute Company Limited | Method and system for determining true touch points on input touch panel using sensing modules |
US9256290B2 (en) | 2013-07-01 | 2016-02-09 | Blackberry Limited | Gesture detection using ambient light sensors |
TW201502607A (en) | 2013-07-04 | 2015-01-16 | Era Optoelectronics Inc | Structure for guiding light into guide light plate to conduct total internal reflection |
WO2015005847A1 (en) | 2013-07-12 | 2015-01-15 | Flatfrog Laboratories Ab | Partial detect mode |
CN203453994U (en) | 2013-07-16 | 2014-02-26 | 山东共达电声股份有限公司 | Light guiding device for implementing light path of optical touch panel and optical touch panel |
EP3022633A4 (en) | 2013-07-19 | 2017-04-12 | Hewlett-Packard Development Company, L.P. | Light guide panel including diffraction gratings |
US9366565B2 (en) | 2013-08-26 | 2016-06-14 | Flatfrog Laboratories Ab | Light out-coupling arrangement and a touch sensitive system comprising the out-coupling arrangement |
KR20150026056A (en) | 2013-08-30 | 2015-03-11 | 삼성전자주식회사 | An electronic device with curved bottom and operating method thereof |
KR20150026044A (en) | 2013-08-30 | 2015-03-11 | 엘지디스플레이 주식회사 | Optical sheet, backlight unit and display device comprising the same |
US9347833B2 (en) * | 2013-10-10 | 2016-05-24 | Qualcomm Incorporated | Infrared touch and hover system using time-sequential measurements |
CN104626057B (en) | 2013-11-06 | 2016-06-01 | 纬创资通股份有限公司 | For auxiliary means and the using method of touch control display apparatus assembling |
JP2015095104A (en) | 2013-11-12 | 2015-05-18 | シャープ株式会社 | Touch panel device |
US10152176B2 (en) | 2013-11-22 | 2018-12-11 | Flatfrog Laboratories Ab | Touch sensitive apparatus with improved spatial resolution |
TWI528226B (en) | 2014-01-15 | 2016-04-01 | 緯創資通股份有限公司 | Image based touch apparatus and control method thereof |
US10126882B2 (en) | 2014-01-16 | 2018-11-13 | Flatfrog Laboratories Ab | TIR-based optical touch systems of projection-type |
US20160328090A1 (en) | 2014-01-16 | 2016-11-10 | FlatFrong Laboratories AB | Oled display panel |
WO2015108477A1 (en) | 2014-01-16 | 2015-07-23 | Flatfrog Laboratories Ab | Touch-sensing quantum dot lcd panel |
WO2015108479A1 (en) | 2014-01-16 | 2015-07-23 | Flatfrog Laboratories Ab | Light coupling in tir-based optical touch systems |
US9839145B2 (en) | 2014-01-24 | 2017-12-05 | Lg Electronics Inc. | Display device |
AU2015217268B2 (en) | 2014-02-12 | 2018-03-01 | Apple Inc. | Force determination employing sheet sensor and capacitive array |
US9298284B2 (en) | 2014-03-11 | 2016-03-29 | Qualcomm Incorporated | System and method for optically-based active stylus input recognition |
US20150271481A1 (en) | 2014-03-21 | 2015-09-24 | Christie Digital Systems Usa, Inc. | System for forming stereoscopic images |
US20150286698A1 (en) | 2014-04-07 | 2015-10-08 | Microsoft Corporation | Reactive digital personal assistant |
JP5792348B1 (en) | 2014-04-16 | 2015-10-07 | シャープ株式会社 | Position input device and touch panel |
US9552473B2 (en) | 2014-05-14 | 2017-01-24 | Microsoft Technology Licensing, Llc | Claiming data from a virtual whiteboard |
CN105094456A (en) | 2014-05-21 | 2015-11-25 | 中强光电股份有限公司 | Optical touch-control device and correction method thereof |
US9864470B2 (en) | 2014-05-30 | 2018-01-09 | Flatfrog Laboratories Ab | Enhanced interaction touch system |
US10867149B2 (en) | 2014-06-12 | 2020-12-15 | Verizon Media Inc. | User identification through an external device on a per touch basis on touch sensitive devices |
KR20150145836A (en) | 2014-06-19 | 2015-12-31 | 삼성디스플레이 주식회사 | Display apparatus and manufacturing method thereof |
US10161886B2 (en) | 2014-06-27 | 2018-12-25 | Flatfrog Laboratories Ab | Detection of surface contamination |
KR101577331B1 (en) * | 2014-07-30 | 2015-12-14 | 엘지전자 주식회사 | Display apparatus and method for operating the same |
DE112015004010T5 (en) | 2014-09-02 | 2017-06-14 | Rapt Ip Limited | Instrument detection with an optical touch-sensitive device |
US9626020B2 (en) | 2014-09-12 | 2017-04-18 | Microsoft Corporation | Handedness detection from touch input |
US10338725B2 (en) | 2014-09-29 | 2019-07-02 | Microsoft Technology Licensing, Llc | Wet ink predictor |
US9921685B2 (en) | 2014-12-15 | 2018-03-20 | Rapt Ip Limited | Tactile effect waveguide surface for optical touch detection |
US20160216844A1 (en) | 2015-01-28 | 2016-07-28 | Flatfrog Laboratories Ab | Arrangement For a Touch Sensitive Apparatus |
EP3250993B1 (en) | 2015-01-28 | 2019-09-04 | FlatFrog Laboratories AB | Dynamic touch quarantine frames |
US10318074B2 (en) | 2015-01-30 | 2019-06-11 | Flatfrog Laboratories Ab | Touch-sensing OLED display with tilted emitters |
WO2016130074A1 (en) | 2015-02-09 | 2016-08-18 | Flatfrog Laboratories Ab | Optical touch system comprising means for projecting and detecting light beams above and inside a transmissive panel |
KR102342869B1 (en) | 2015-02-26 | 2021-12-23 | 삼성디스플레이 주식회사 | Flexible display device and method of fabricating the same |
EP3869306A1 (en) | 2015-03-02 | 2021-08-25 | Wacom Co., Ltd. | Active capacitive stylus, sensor controller, related system and method |
EP3265855A4 (en) | 2015-03-02 | 2018-10-31 | FlatFrog Laboratories AB | Optical component for light coupling |
CN205015574U (en) | 2015-10-14 | 2016-02-03 | 深圳市联合盛电子有限公司 | Touch -sensitive screen and LCD module laminating tool group |
CN105224138B (en) | 2015-10-22 | 2019-04-19 | 京东方科技集团股份有限公司 | Suspension touch control display device |
US10884553B2 (en) | 2015-11-03 | 2021-01-05 | Hewlett-Packard Development Company, L.P. | Light guide and touch screen assembly |
US10001882B2 (en) | 2015-12-02 | 2018-06-19 | Rapt Ip Limited | Vibrated waveguide surface for optical touch detection |
TWI573546B (en) | 2016-02-01 | 2017-03-11 | 緯創資通股份有限公司 | Frame fastening assembly, frame assembly and method of mounting a frame |
CN209046978U (en) | 2016-02-12 | 2019-06-28 | 平蛙实验室股份公司 | Assembling tool and set group for panel and touch sensing system |
CN205384833U (en) | 2016-03-06 | 2016-07-13 | 长沙环境保护职业技术学院 | Intelligent tourism electron photo holder frame |
CN107908353B (en) | 2016-09-30 | 2020-12-18 | 禾瑞亚科技股份有限公司 | Electronic system, touch control processing device and method thereof |
KR20180037749A (en) | 2016-10-05 | 2018-04-13 | 에스프린팅솔루션 주식회사 | Display apparatus |
US10437391B2 (en) | 2016-11-17 | 2019-10-08 | Shenzhen GOODIX Technology Co., Ltd. | Optical touch sensing for displays and other applications |
US10761657B2 (en) | 2016-11-24 | 2020-09-01 | Flatfrog Laboratories Ab | Automatic optimisation of touch signal |
KR102630571B1 (en) | 2016-11-29 | 2024-01-30 | 엘지디스플레이 주식회사 | Flat Panel Display Embedding Optical Imaging Sensor |
HUE059960T2 (en) | 2016-12-07 | 2023-01-28 | Flatfrog Lab Ab | A curved touch device |
EP3552084A4 (en) | 2016-12-07 | 2020-07-08 | FlatFrog Laboratories AB | Active pen true id |
WO2018174788A1 (en) | 2017-03-22 | 2018-09-27 | Flatfrog Laboratories | Object characterisation for touch displays |
EP3602259A4 (en) | 2017-03-28 | 2021-01-20 | FlatFrog Laboratories AB | Touch sensing apparatus and method for assembly |
KR102403009B1 (en) | 2017-04-28 | 2022-05-30 | 엘지디스플레이 주식회사 | Display device integrated with fingerprint sensor using holographic optical element |
KR102331584B1 (en) | 2017-06-08 | 2021-11-30 | 엘지전자 주식회사 | Display device |
WO2019073300A1 (en) | 2017-10-10 | 2019-04-18 | Rapt Ip Limited | Thin couplers and reflectors for sensing waveguides |
CN107957812B (en) | 2017-11-15 | 2021-06-08 | 苏州佳世达电通有限公司 | Touch device and touch device identification method |
US11169641B2 (en) | 2018-01-23 | 2021-11-09 | Beechrock Limited | Compliant stylus interaction with touch sensitive surface |
US11175767B2 (en) | 2018-02-19 | 2021-11-16 | Beechrock Limited | Unwanted touch management in touch-sensitive devices |
US11036338B2 (en) | 2018-04-20 | 2021-06-15 | Beechrock Limited | Touch object discrimination by characterizing and classifying touch events |
US10983611B2 (en) | 2018-06-06 | 2021-04-20 | Beechrock Limited | Stylus with a control |
US11003284B2 (en) | 2018-06-12 | 2021-05-11 | Beechrock Limited | Touch sensitive device with a camera |
US11016600B2 (en) | 2018-07-06 | 2021-05-25 | Beechrock Limited | Latency reduction in touch sensitive systems |
TWI734024B (en) | 2018-08-28 | 2021-07-21 | 財團法人工業技術研究院 | Direction determination system and direction determination method |
KR102469722B1 (en) | 2018-09-21 | 2022-11-22 | 삼성전자주식회사 | Display apparatus and control methods thereof |
KR102656834B1 (en) | 2018-10-17 | 2024-04-16 | 삼성전자주식회사 | Display apparatus and control method thereof |
US11054935B2 (en) | 2018-11-19 | 2021-07-06 | Beechrock Limited | Stylus with contact sensor |
KR102625830B1 (en) | 2018-11-27 | 2024-01-16 | 삼성전자주식회사 | Display apparatus, method for controlling the same and recording media thereof |
US10649585B1 (en) | 2019-01-08 | 2020-05-12 | Nxp B.V. | Electric field sensor |
TWI713987B (en) | 2019-02-01 | 2020-12-21 | 緯創資通股份有限公司 | Optical touch panel and pressure measurement method thereof |
WO2020201831A1 (en) | 2019-03-29 | 2020-10-08 | Rapt Ip Limited | Unwanted touch management in touch-sensitive devices |
US20200341587A1 (en) | 2019-04-24 | 2020-10-29 | Rapt Ip Limited | Thin Interactive Display |
US11624878B2 (en) | 2019-05-03 | 2023-04-11 | Beechrock Limited | Waveguide-based image capture |
US20200387237A1 (en) | 2019-06-10 | 2020-12-10 | Rapt Ip Limited | Instrument with Passive Tip |
-
2016
- 2016-02-09 WO PCT/SE2016/050098 patent/WO2016130074A1/en active Application Filing
- 2016-02-09 EP EP19165019.1A patent/EP3537269A1/en not_active Withdrawn
- 2016-02-09 CN CN201680008239.0A patent/CN107209609A/en active Pending
- 2016-02-09 US US15/547,587 patent/US10496227B2/en active Active
- 2016-02-09 EP EP16749542.3A patent/EP3256936A4/en not_active Withdrawn
-
2019
- 2019-10-28 US US16/666,013 patent/US11029783B2/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130155027A1 (en) * | 2008-06-19 | 2013-06-20 | Neonode Inc. | Optical touch screen systems using total internal reflection |
US20110122075A1 (en) * | 2009-11-23 | 2011-05-26 | Samsung Electronics Co., Ltd. | Multi-touch detecting appratus and method for lcd display apparatus |
US20110221705A1 (en) * | 2010-03-12 | 2011-09-15 | Samsung Electronics Co., Ltd. | Touch object and proximate object sensing apparatus by selectively radiating light |
US20140192023A1 (en) * | 2013-01-10 | 2014-07-10 | Samsung Display Co., Ltd. | Proximity and touch sensing surface for integration with a display |
Non-Patent Citations (3)
Title |
---|
See also references of EP3256936A4 * |
YOUNGSEOK AHN ET AL.: "A slim and wide multi-touch tabletop ' interface and its applications", 2014 INTERNATIONAL CONFERENCE ON BIG DATA AND SMART COMPUTING (BIGCOMP), 15 January 2014 (2014-01-15), pages 276 - 281, XP032567479 * |
YOUNGSEOK AHN ET AL.: "A slim and wide multi-touch tabletop ' interface and its applications", 2014 INTERNATIONAL CONFERENCE ON BIG DATA AND SMART COMPUTING (BIGCOMP), 15 January 2014 (2014-01-15), pages 276 - 281, XP032567479, ISSN: 2375-933X, DOI: doi:10.1109/BIGCOMP.2014.6741452 * |
Cited By (31)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11182023B2 (en) | 2015-01-28 | 2021-11-23 | Flatfrog Laboratories Ab | Dynamic touch quarantine frames |
US11029783B2 (en) | 2015-02-09 | 2021-06-08 | Flatfrog Laboratories Ab | Optical touch system comprising means for projecting and detecting light beams above and inside a transmissive panel |
US20210173514A1 (en) * | 2016-12-07 | 2021-06-10 | Flatfrog Laboratories Ab | Touch device |
US11579731B2 (en) | 2016-12-07 | 2023-02-14 | Flatfrog Laboratories Ab | Touch device |
EP4152132A1 (en) | 2016-12-07 | 2023-03-22 | FlatFrog Laboratories AB | An improved touch device |
US11281335B2 (en) | 2016-12-07 | 2022-03-22 | Flatfrog Laboratories Ab | Touch device |
EP3667475A1 (en) | 2016-12-07 | 2020-06-17 | FlatFrog Laboratories AB | A curved touch device |
US10775935B2 (en) | 2016-12-07 | 2020-09-15 | Flatfrog Laboratories Ab | Touch device |
US11474644B2 (en) | 2017-02-06 | 2022-10-18 | Flatfrog Laboratories Ab | Optical coupling in touch-sensing systems |
US11740741B2 (en) | 2017-02-06 | 2023-08-29 | Flatfrog Laboratories Ab | Optical coupling in touch-sensing systems |
WO2018174786A1 (en) * | 2017-03-22 | 2018-09-27 | Flatfrog Laboratories | Pen differentiation for touch displays |
WO2018174787A1 (en) * | 2017-03-22 | 2018-09-27 | Flatfrog Laboratories | Eraser for touch displays |
US11016605B2 (en) | 2017-03-22 | 2021-05-25 | Flatfrog Laboratories Ab | Pen differentiation for touch displays |
US11099688B2 (en) | 2017-03-22 | 2021-08-24 | Flatfrog Laboratories Ab | Eraser for touch displays |
US10845923B2 (en) | 2017-03-28 | 2020-11-24 | Flatfrog Laboratories Ab | Touch sensing apparatus and method for assembly |
US11281338B2 (en) | 2017-03-28 | 2022-03-22 | Flatfrog Laboratories Ab | Touch sensing apparatus and method for assembly |
WO2018182476A1 (en) * | 2017-03-28 | 2018-10-04 | Flatfrog Laboratories Ab | Touch sensing apparatus and method for assembly |
US10739916B2 (en) | 2017-03-28 | 2020-08-11 | Flatfrog Laboratories Ab | Touch sensing apparatus and method for assembly |
US10606416B2 (en) | 2017-03-28 | 2020-03-31 | Flatfrog Laboratories Ab | Touch sensing apparatus and method for assembly |
US11269460B2 (en) | 2017-03-28 | 2022-03-08 | Flatfrog Laboratories Ab | Touch sensing apparatus and method for assembly |
US10437389B2 (en) | 2017-03-28 | 2019-10-08 | Flatfrog Laboratories Ab | Touch sensing apparatus and method for assembly |
CN111052058A (en) * | 2017-09-01 | 2020-04-21 | 平蛙实验室股份公司 | Improved optical component |
US11256371B2 (en) | 2017-09-01 | 2022-02-22 | Flatfrog Laboratories Ab | Optical component |
EP3676694A4 (en) * | 2017-09-01 | 2021-06-09 | FlatFrog Laboratories AB | Improved optical component |
US11650699B2 (en) | 2017-09-01 | 2023-05-16 | Flatfrog Laboratories Ab | Optical component |
CN111052058B (en) * | 2017-09-01 | 2023-10-20 | 平蛙实验室股份公司 | Improved optical component |
US11567610B2 (en) | 2018-03-05 | 2023-01-31 | Flatfrog Laboratories Ab | Detection line broadening |
WO2019172826A1 (en) * | 2018-03-05 | 2019-09-12 | Flatfrog Laboratories Ab | Improved touch-sensing apparatus |
WO2019172827A1 (en) * | 2018-03-05 | 2019-09-12 | Flatfrog Laboratories Ab | Improved touch-sensing apparatus |
US11943563B2 (en) | 2019-01-25 | 2024-03-26 | FlatFrog Laboratories, AB | Videoconferencing terminal and method of operating the same |
US11893189B2 (en) | 2020-02-10 | 2024-02-06 | Flatfrog Laboratories Ab | Touch-sensing apparatus |
Also Published As
Publication number | Publication date |
---|---|
US20200201479A1 (en) | 2020-06-25 |
US10496227B2 (en) | 2019-12-03 |
EP3256936A4 (en) | 2018-10-17 |
CN107209609A (en) | 2017-09-26 |
EP3537269A1 (en) | 2019-09-11 |
WO2016130074A4 (en) | 2016-10-13 |
EP3256936A1 (en) | 2017-12-20 |
US20180267672A1 (en) | 2018-09-20 |
US11029783B2 (en) | 2021-06-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US11029783B2 (en) | Optical touch system comprising means for projecting and detecting light beams above and inside a transmissive panel | |
US10268319B2 (en) | Edge-coupled touch-sensitive apparatus | |
US9857917B2 (en) | Optical coupling of light into touch-sensing systems | |
US9696853B2 (en) | Optical touch apparatus capable of detecting displacement and optical touch method thereof | |
JP5527782B2 (en) | Touch sensor system and control method thereof | |
JP5582622B2 (en) | Contact surface with compensation signal profile | |
US20090278795A1 (en) | Interactive Input System And Illumination Assembly Therefor | |
US20100295821A1 (en) | Optical touch panel | |
US20150331545A1 (en) | Laminated optical element for touch-sensing systems | |
US20140320459A1 (en) | Optical touch screens | |
CN104094203A (en) | Optical coupler for use in optical touch sensitive device | |
US20150035799A1 (en) | Optical touchscreen | |
CN101663637A (en) | Touch screen system with hover and click input methods | |
US20150317034A1 (en) | Water-immune ftir touch screen | |
US20140306933A1 (en) | Light guide plate touch device | |
TWI438669B (en) | Optical touch module and method thereof | |
WO2013191638A1 (en) | Optical coupling in touch-sensing systems using diffusively reflecting element | |
EP3005048B1 (en) | Optical touch screens | |
KR20100066671A (en) | Touch display apparatus | |
TWI451310B (en) | Optical touch module and light source module thereof | |
WO2013047445A1 (en) | Touch panel and display device comprising touch panel | |
KR101125824B1 (en) | Infrared touch screen devices | |
KR20120096809A (en) | Touch screen using multi reflection | |
KR20120025333A (en) | Infrared touch screen devices |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 16749542 Country of ref document: EP Kind code of ref document: A1 |
|
REEP | Request for entry into the european phase |
Ref document number: 2016749542 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 15547587 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |