• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    ULTRASOUND TOUCH SENSOR WITH A DISPLAY MONITOR. A touch screen monitor having a display monitor and an ultrasonic device. The ultrasonic device may include an array of sensors using piezoelectric sensors to detect the surface topology of a biological object or other object that is in contact with a surface of the display monitor. The display monitor can be an LCD or LED monitor.
    公开号:BR112014019107B1
    申请号:R112014019107-7
    申请日:2013-02-04
    公开日:2021-05-04
    发明作者:John K. Schneider；Jack C. Kitchens
    申请人:Qualcomm Incorporated；
    IPC主号:
    专利说明:

    Cross Reference to Related Orders
    [0001] This application claims the priority benefits of U.S. Provisional Patent Application No. 61/594,330, filed February 2, 2012. Field of Invention
    [0002] The present invention relates to devices and methods of collecting information about an object that is in contact with a monitor. Background of the Invention
    [0003] In the prior art, touch screen monitors are commonly used to assist users with the selection of items displayed on a monitor. Item selection is commonly performed using a pointing object, such as a pen or finger. Such touch screen monitors often employ a capacitance sensor to identify the location at which the pointing object touches the display monitor. The identified location is then compared to the location of the images displayed on the monitor to determine what the user is identifying.
    [0004] Although these prior art touch screen monitors have become reliable and inexpensive, prior art devices do not incorporate any built-in sensor elements suitable for reliably measuring a touch event, and despite many of these devices prior art are ideal for dry and clean environments, they often fail in dirty, wet or harsh conditions.
    [0005] The invention can be embodied as a touch screen monitor having a display monitor to provide a visual image, and an ultrasonic device capable of emitting an ultrasonic energy wave, and capable of detecting the reflected ultrasonic energy. The display monitor may include light emitting diodes to provide a visual image, or a liquid crystal display to provide a visual image.
    [0006] The ultrasonic device may include a piezoelectric transmitter for emitting ultrasonic energy wave. In addition, the ultrasonic device may include a piezoelectric detector, such as a hydrophone assembly, for detecting reflected ultrasonic energy. The detector may include a thin-film transistor receiver for detecting reflected ultrasonic energy.
    [0007] The display monitor can consist of layers of components, and the ultrasonic device can consist of at least one layer. The ultrasonic device can be attached to one or more of the display monitor layers.
    [0008] The ultrasonic device may include a plurality of receivers for detecting reflected ultrasonic energy. In an embodiment of the invention, each ultrasonic energy receiver is located between display monitor elements comprising a pixel. Brief Description of Drawings
    [0009] For a deeper understanding of the nature and purposes of the invention, reference should be made to the attached drawings and subsequent description. Briefly, the drawings are: Figure 1, which is an exploded view of a device in which an ultrasonic device in the cell has been integrated into a backlit LCD display monitor to create a touch screen monitor in accordance with invention; Figure 2, which is an exploded view of a device in which an ultrasonic device in the cell has been integrated into an OLED monitor to create a touch screen monitor in accordance with the invention; Figure 3, which is an exploded view of a device in which a cell ultrasonic device has been integrated into a backlit LCD monitor to create a touch screen monitor in accordance with the invention; Figure 4, which is an exploded view of a device in which an ultrasonic cell device has been integrated into an OLED monitor to create a touch screen monitor in accordance with the invention.
    [0010] In the drawings, the following numerical references can be found, and represent: 1 scratch resistant glass 2 continuous electrode (eg TCF (transparent conductive film such as IZO, ITO, etc.) 3 piezoelectric polymer PVDF or PVDF-TrFE 5 colored filter glass (5A, 5B and 5C are the 3 simple RBG colored filters inside the glass) 6 TFT (Thin Film Transistor) circuit 7 TFT substrate (eg glass) 8 piezoelectric transmitter 9 9 polarizing filter 10 liquid crystal 11 backlight panel 12 electrode piece (eg TCF) 13 continuous electrode (eg TCF) 14 optically transparent, non-transmitting filler material. Additional Description of the Invention
    [0011] The present invention relates to ultrasonic scanning devices and display monitors. Information about an object that is in contact with the display monitor is collected using ultrasonic energy. Ultrasonic energy is sent toward a display monitor surface where a pointing object may contact the display monitor. When the ultrasonic energy reaches the aiming object, at least part of the ultrasonic energy is reflected towards an ultrasonic energy receiver. The receiver detects the reflected energy, transmits a signal indicating that the reflected energy has been sensed. Using the transmitted signal, information about the object is determined. This information may include one or more of the following: (a) the location of the pointing object, (b) information about the surface texture of the pointing object, and/or information about the structure of features present in the pointing object, but that are not on the surface of the object to aim.
    [0012] In one embodiment of the invention, an ultrasonic device is attached to a display monitor. For example, the ultrasonic device can be laminated to a portion of the display monitor. The combination of the ultrasonic device and the display monitor is referred to here as a "touch screen monitor". The touch screen monitor can be used to determine the location of the aiming object first, and then determine the location of the aiming object at a second time, in order to track the motion of the pointing object and thus , cause a cursor to be displayed on the display monitor for the purpose of identifying an image, and thus selecting an option (such as a software application) represented by the identified image.
    [0013] The object of pointing may include identifying characteristics that can be used to identify the owner of the object of pointing. For example, the pointing object can be a finger, and the identifying features can be the fingerprint. The touch screen monitor can be used to detect fingerprint to identify the user of the touch screen monitor. In this way, the touch screen monitor can only be made available to authorized users, or the touch screen monitor can display images in a way that is considered preferred by that particular user. In this way, the touch screen monitor can be customized to a particular user's preferences.
    [0014] The phrase "in-cell" touch screen monitor is used here to refer to a touch screen monitor that has an ultrasonic device located within a group of elements that collectively create a display monitor pixel. For example, each ultrasonic receiver is located between display monitor elements comprising a single pixel.
    [0015] The phrase "in-cell" touch screen monitor is used here to refer to a touch screen that has the ultrasonic device coupled to a surface of one of the layers comprising the display monitor. For example, in such an in-cell touch screen monitor, the layer of the display monitor to which the ultrasonic device is attached may be a layer that is typically exposed, or it may be an inner layer of the display monitor. For purposes of this description, the phrase "out of cell" touch screen monitor is used to refer to a particular type of "in cell" touch screen monitor, where the ultrasonic device is attached to a layer of the display monitor. that is not internal to the display monitor, excluding any scratch-resistant, protective surface layer from the display monitor.
    [0016] The ultrasonic device may be an ultrasonic fingerprint imaging system, such as one that uses an ultrasonic sensor to capture information about a fingerprint which can then be compared with previously obtained fingerprint information for purposes of identification, and/or used to display a visible image of the fingerprint. The ultrasonic sensor transmits an ultrasonic pulse or pulse collection, and then detects a reflected portion of the transmitted pulses. Such ultrasonic fingerprint imaging systems are relatively simple and reliable. An example of such a system is the Model 203 manufactured by Ultra-Scan Corporation.
    [0017] The ultrasonic device can employ a plurality of detectors to detect the energy reflected by the pointing object. Each detector can be individually calibrated to remove fixed pattern noise effects that may be characteristic of the components that make up the ultrasonic device, the display monitor, or both. These effects can include variations between detectors that can arise from differences in amplifiers, as well as variations arising from the manufacturing process (eg glue, contaminants, etc.). Variations in ultrasonic attenuation caused by variations between display monitor pixels will be detected as an immutable part of the fixed-pattern noise received by the ultrasonic sensor, and such fixed-pattern noise can be removed when analyzing the signals that are transmitted by the receiver to indicate that the reflected energy was perceived by the receiver. Once the fixed pattern noise is removed, a "clean" signal results and is representative of the surface being analyzed by the ultrasonic sensor.
    [0018] The ultrasonic device may include an electronic control system that supplies the timing signals. Some of these timing signals can be used to cause the ultrasonic device to emit a pulse of ultrasonic energy. Other such timing signals can be used in a process commonly referred to as "band gate" where a determination is made as to which of the reflected ultrasonic energy that is detected by the ultrasonic device is related to the surface on which the object is aimed. can be located. A discussion of the range port can be found in many trusted texts on nondestructive sonar, radar, or ultrasonic testing.
    [0019] The timing signals, pulse generation initiation and TFT sensor signal readout which can then be further processed into an image of an object that is in contact with the protective plastic film plate.
    [0020] Display monitors currently on the market include those using light-emitting diodes and liquid crystal displays to present a visible image to a user. Such display monitors are light, thin, flat, reliable and inexpensive. When such a display monitor is combined with an ultrasonic device, the resulting touch screen monitor offers the ability to use a finger to point to an image on the monitor, and provide capabilities like those currently offered by touchpads used in conjunction with personal computers and personal digital assistants.
    [0021] Having provided an overview of the invention, further details will now be provided.
    [0022] There is no requirement that the resolution of the display monitor and the resolution of the ultrasonic device must be the same. This allows systems where, for example, the display monitor resolution can be 100 dots per inch and the ultrasonic device can be 10 dots per inch, or any other combination that is convenient for the application. In cell systems, however, the placement of the ultrasonic device receivers within the 3-color group comprising a color display monitor pixel, and thus the addition of an ultrasonic receiver for the display pixel components of 3 colors typically have a one-to-one receiver-to-pixel group relationship, but a one-to-one association is not required. For example, omitting ultrasonic receiver groups from some display monitor pixels would allow different tilt spacing for the display monitor and ultrasonic device.
    [0023] In an embodiment of a cell touch monitor with a piezoelectric imaging system coupled to an LCD display monitor is shown in figure 1. To an edge-illuminated backlight panel 11 a transmitter is fixed. piezoelectric film 8. On the surface of the backlighting panel 11 opposite the piezoelectric transmitter 8, a TFT 6 on a video substrate 7 is fixed. Above this is a layer of liquid crystal material 10. Immediately above this is a layer of transparent conductive film (TCF) 13 affixed to a colored filter 5, the upper part of which also has a layer of conductive TCF 2 For this TCF layer 2 there is a layer of piezoelectric polymer 3 (or copolymer). A pattern of individual TCF parts 2 is applied to piezoelectric polymer layer 3 or alternatively a bias filter 9, and the outer surface is given a scratch resistant glass or plastic 1. The resulting touch screen monitor operates similarly to most of LCD monitors and a voltage between the TCF patterned TFT electrode (not explicitly illustrated, but part of the TFT itself) on the TFT, and the continuous common plane electrode 13 allows each display pixel to be turned on or off using light polarizers. If light that has been passed through a polarizing filter then passes through a second polarizer oriented 90 degrees to the first, the light will be blocked completely and will not pass through the second polarizer. The LCD monitor uses a fixed polarizing filter which is typically a plastic sheet, the second polarizing filter is the liquid crystal material itself. If a voltage is applied, it polarizes the light, thus preventing light from being emitted, and if no voltage is applied, light can pass. Ultrasonic characteristics come into play when the piezoelectric film transmitter emits a pulse of ultrasonic energy. The ultrasonic energy pulse travels through several layers to the outwardly facing surface (in this case, the glass or scratch resistant plastic) where at least part of the ultrasonic energy pulse then reflects down again, bringing with it the information about the ultrasonic impedance of the surface and any objects that are in contact with the surface. The piezoelectric ultrasonic energy pulse is detected by the hydrophone assembly which consists of piezoelectric polymer film 3 and two layers of TCF electrode that come in contact with both the continuous electrode 2 and the electrode assembly 12. Trace conductors interconnect the assembly electrode 2 with the electronics (not shown) allowing the ultrasonic device to produce a signal transmission corresponding to the individual ultrasonic signals associated with each receiving element of the ultrasonic array of the hydrophone array.
    [0024] Figure 2 presents an alternative embodiment of an In-Cell touch screen monitor. In this modality, the liquid crystal layer of the monitor 10 and TCF electrodes associated with the display monitor is not required. The backlight layer 11 is also not needed as the TFT monitor contains OLED elements that directly light up and illuminate the monitor. In this case, the ultrasonic transmitter can be attached to the back of the TFT substrate glass.
    [0025] Figure 3 shows another embodiment of the invention. In this modality, the touch screen monitor is a cell touch monitor. For an edge-illuminated backlight panel 11, a piezoelectric film transmitter 8 is attached. On the surface of the backlight panel 11 opposite the piezoelectric transmitter 8, a TFT 6 on a glass substrate 7 is attached. This TFT 6 has many circuits. The individual pixels are groups of three LCD control amplifiers and an ultrasonic receiver circuit. The ultrasonic receiver additionally has a piezoelectric polymer attached to it. Above this is a layer of liquid crystal material 10. Above this is a continuous electrode (TCF) 2 which is used as the common electrode for the receiver and as the common electrode for the LCD driver circuits. This TCF can be affixed to a color filter 5. The next layer up (in figure 3) in the stack is the polarizing filter 9 and finally the outer surface receives a layer of scratch resistant glass or plastic 1. This display operates in such a way similar to most LCD monitors and a voltage between the standardized TCF TFT electrode on the TFT and continuous common plane electrode 2 allows each display pixel to be turned on or off.
    [0026] Another modality of a cell touch monitor according to the invention is shown in figure 4. To the rear of the substrate of the TFT circuit 7, a piezoelectric film transmitter 8 is fixed. groups of cells creating individual colored pixels, each pixel being made up of three light-emitting cells and an ultrasonic sensor cell. Attached to the ultrasonic sensor cell TFT can be a 3-layer laminate that is composed of a TCF 2 electrode, a piezoelectric polymer layer 3, and another TCF 12 film electrode that is continuous through the TFT. The optically transparent insulating material 14 can be used above (in figure 4) the OLEDs to insulate them from the light emitting display circuitry and the TCF 2. Illustrated in figure 4 above is a colored filter glass 5 to enable the red-green-blue display color. A scratch-resistant surface layer 1 protects the stack from physical abrasion and mechanical damage. It should be noted that although a one-to-one relationship between light pixel and ultrasonic sensor pixel is described, it would be easy to omit multiple sensor pixels to change the resolution of the ultrasonic device.
    [0027] Although the present invention has been described with respect to one or more particular embodiments, it will be understood that other embodiments of the present invention may be made without departing from the spirit and scope of the present invention. Accordingly, the present invention is considered limited only by the appended claims, and their reasonable interpretation.
    权利要求:
    Claims (4)
    [0001]
    1. Touch-screen monitor, comprising: a display monitor for providing a visual image; and an ultrasonic device (6, 8) including an ultrasonic transmitter (8) configured to emit a wave of ultrasonic energy, and a plurality of ultrasonic receivers (6) configured to detect the reflected ultrasonic energy; the touchscreen monitor characterized in that it includes a plurality of pixels, each pixel comprising a group of light emitting cells and a thin-film transistor ultrasonic sensor cell (6) of the plurality of ultrasonic receivers.
    [0002]
    2. Monitor with touch screen, according to claim 1, characterized in that the display monitor comprises organic light-emitting diodes to provide the visual image.
    [0003]
    3. Touch screen monitor according to claims 1 or 2, characterized in that the ultrasonic device comprises a piezoelectric transmitter (8) to emit the ultrasonic energy wave.
    [0004]
    4. Method for collecting information about an object that is in contact with a touchscreen monitor as defined in any one of the preceding claims, the method characterized by the fact that it comprises: causing the ultrasonic device to emit a wave of energy ultrasonic towards the surface of the display device; reflect at least some ultrasonic energy from the surface; and detecting reflected ultrasonic energy.
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    法律状态:
    2018-12-04| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2020-01-14| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-10-13| B07A| Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]|
    2021-02-17| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-05-04| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 04/02/2013, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US201261594330P| true| 2012-02-02|2012-02-02|
    US61/594,330|2012-02-02|
    PCT/US2013/024627|WO2013116835A1|2012-02-02|2013-02-04|Ultrasonic touch sensor with a display monitor|
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