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
  • G06F3/045—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
• • 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
  • G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
  • G06F3/04146—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position using pressure sensitive conductive elements delivering a boolean signal and located between crossing sensing lines, e.g. located between X and Y sensing line layers
• • 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
  • G06F3/047—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using sets of wires, e.g. crossed wires

Definitions

• the present invention relates to the category of multi-point transparent tactile sensors.
• multitouch transparent touch sensors These are, for example, resistive matrix sensors coupled to a control circuit.
• Such a sensor is for example the subject of Patent No. EP1719047 relating to a virtual object controller via a multicontact touch screen.
• This patent of the prior art relates to a man-machine interface allowing for example the control of music software by a touch screen with manipulation of virtual graphic objects.
• It relates to a method for controlling computerized equipment by a device comprising a two-dimensional multicontact sensor for the acquisition of tactile information, as well as calculation means generating control signals as a function of said tactile information, characterized in that it comprises a step of generating graphic objects on a screen placed under a transparent tactile sensor, each of the graphic objects being associated with at least one specific processing law, the sensor delivering at each acquisition phase a plurality of information tactile, each of said touch information being the subject of a specific treatment determined by its location with respect to the position of one of said graphic objects.
• the touch screen is provided with electrical contacts for receiving touch screen signals and conductive vias located across the substrate and electrically connected to the electrical contacts.
• the display also includes an OLED flat screen having a display substrate having electrical contacts for receiving display signals and an exposed area on the display substrate to provide an electrical connection with the electrical contacts of the display.
• display screen and touch screen The touch screen substrate is the OLED flat panel coating or substrate, the conductive vias are electrically connected to the electrical conductors and contacts on the display substrate, and the screen substrate. OLED flat spring protrudes beyond the coating, so as to produce an electrical connection with the electrical contacts of the touch screen and display.
• the disadvantage of the sensors of the prior art is that the passive matrix organization induces problems of detection of several contact points located in orthogonal configurations.
• the control circuit must then best compensate for these problems thanks to a measurement redundancy and an appropriate digital processing algorithm. This induces a complexity of the control circuit as well as an uncertainty of measurement of the points of contact.
• the solution proposed by the present invention is to implement a multi-point transparent touch sensor free from these measurement defects.
• the present invention aims to address this drawback by a multi-point transparent touch sensor architecture with cells completely independent of each other.
• the screen according to the present invention does not use an active matrix of TFT (Thin Film Transistor) type which would induce a higher manufacturing cost.
• the control circuit is easier to implement than in the case of a matrix passive and the cost of manufacture is advantageously reduced.
• the industrialization costs of this type of sensor are lower.
• the invention relates to a transparent multi-touch sensor comprising a transparent semiconductive active layer located between two transparent conductive layers arranged in a matrix of cells formed by the intersection of lines and columns, characterized in that it comprises a control circuit successively supplying each semiconductor portion corresponding to a cell, said control circuit comprising a means for analyzing the variation of the electrical characteristics caused by the deformation of one or more zones of the sensor, each zone comprising one or more cells, the semiconductor characteristic of said intermediate layer making the cells independent of the measurement circuit.
• the semiconductor active layer is constituted by an organic or polymeric material dispensed in a thin layer.
• the semiconductor layer is electrically isolated from one of the adjacent layers by spacing maintained by spacers, this insulation being broken locally by the deformation of the activated touch zone.
• the semiconductor layer is electrically isolated from one of the adjacent layers by means of a transparent conductive material whose electrical characteristics are modified locally by the deformation of the activated touch zone.
• the electrical characteristics of the semiconductor layer are modified locally by the deformation of the activated touch zone.
• the variation of the electrical characteristics of the activated touch zone is a function of the pressure exerted on said touch zone.
• the semiconductor layer emits light locally when it is subjected to the electrical activation of a cell, all of the local light emissions assimilating it to a display.
• control circuit provides two scanning frequencies, one for the display, the other for reading the position of at least one activated touch zone.
• FIG. 1 represents a sectional view of an exemplary embodiment of a sensor
• FIG. 1 shows a schematic front view of such a sensor.
• the sensor shown in sectional view in FIG. 1 comprises: a matrix of MxN cells corresponding to the intersection of X columns by Y lines,
• a layer (1) consisting of a series of X transparent conductive columns
• a thin layer (3) made of a semiconductor material equivalent to a set of vertical diodes, - A layer (4) consisting of a series of Y transparent conductive lines such as the layer A.
• the layers (1) and (4) can be made of polyester or glass made conductive by ITO or carbon in thin layer (nano-tubes).
• the layer (2) may be made of transparent piezoelectric materials such as PVDF or a conductive material sensitive to pressure such as a polymer charged with conductive particles. In the case where the layer (2) consists of spacers, the pressure information can not be measured. We simply measure whether there is contact or not.
• Figure 2 shows a front view of the sensor, and the control circuit and measurement.
• the principle is as follows:
• V + and V- Two polarization potentials V + and V- are defined such that: o If V + is applied to a column 'x' of layer (1) and V- to a line 'y' of layer D, the equivalent diode located at intersection P (x, y) is passing. o In all other polarization combinations (V + with V +, V- with V +, V- with V-) the diode is blocked.
• This method which uses an active diode-based system, makes it possible to measure each cell in isolation without experiencing the electrical interactions linked to a passive matrix: the potentials are not transmitted from one line to another or from one column to another. another orthogonally due to the blocking electrical effect of the diode C layer.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Theoretical Computer Science (AREA)
• Human Computer Interaction (AREA)
• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Position Input By Displaying (AREA)
• Force Measurement Appropriate To Specific Purposes (AREA)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

Country Status (5)

Cited By (1)

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Family Cites Families (6)

• 2007
  • 2007-04-05 FR FR0754292A patent/FR2914756B1/fr not_active Expired - Fee Related
• 2008
  • 2008-04-03 US US12/594,563 patent/US20100117974A1/en not_active Abandoned
  • 2008-04-03 CN CN200880014876A patent/CN101675412A/zh active Pending
  • 2008-04-03 EP EP08787902A patent/EP2142980A1/de not_active Withdrawn
  • 2008-04-03 WO PCT/FR2008/000463 patent/WO2008139050A1/fr active Application Filing

Non-Patent Citations (1)

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