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Display device

  • US 9,310,947 B2
  • Filed: 07/25/2012
  • Issued: 04/12/2016
  • Est. Priority Date: 07/29/2011
  • Status: Active Grant
First Claim
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1. A display device, comprising:

  • a position detecting section;

    a display section including a plurality of pixels;

    a code sequence signal supplying circuit; and

    a control circuit for the position detecting section, whereinthe position detecting section including a plurality of position detecting elements arranged in a matrix manner,the plurality of position detecting elements each being electrically connected to a corresponding one of first wires and a corresponding one of second wires, the first wires and the second wires being electrically separated from each other,the code sequence signal supplying circuit being configured to apply signals of respective different code sequences to two or more of the first wires at a time,the display section being configured to operate such that one frame period is constituted by (i) a first period during which image data is sequentially written to the plurality of pixels and (ii) a second period other than the first period,the control circuit for the position detecting section being configured to carry out control so that (i) signals from the plurality of position detecting elements are obtained via the second wires during the second period and (ii) calculation is carried out to reconstruct the signals from the plurality of position detecting elements and the code sequences and, on the basis of values of the signals and code sequences thus reconstructed, a position of a detection target is detected,the first wires are first electrodes arranged along a first direction, and the second wires are second electrodes arranged along a second direction that is different from the first direction,the first electrodes and the second electrodes intersect each other,the first electrodes and the second electrodes have an insulating layer between them,the plurality of position detecting elements are capacitances formed in portions in each of which one of the first electrodes and one of the second electrodes are close to each other,the signals of respective different code sequences supplied to the first electrodes pass through the capacitances and are outputted via the second electrodes,the capacitance change depending on whether there is the detection target in the portions in each of which one of the first electrodes and one of the second electrodes are close to each other, anda detection circuit for the position detecting section is configured to detect where, in the portions in each of which one of the first electrodes and one of the second electrodes are close to each other, the detection target is present, on the basis of the signals passing through the capacitances and outputted via the second electrodes,the first electrodes and the second electrodes are each constituted by unit electrodes which have a predetermined shape and are electrically connected with each other,the first electrodes or the second electrodes are configured such that adjacent ones of the unit electrodes are electrically connected with each other via a first conductive layer that is different from the first electrodes and the second electrodes,the unit electrodes of the first electrodes and the unit electrodes of the second electrodes are provided on an identical plane in such a manner that they are adjacent to each other without overlapping each other when viewed from above,the display section includes an upper substrate, a lower substrate and a liquid crystal layer sandwiched between the upper substrate and the lower substrate;

    the upper substrate or the lower substrate includes a common electrode layer,a second conductive layer made from metal is (i) provided on a plane where the first conductive layer is provided and (ii) electrically separated from the first conductive layer, andthe second conductive layer is electrically connected to the common electrode layer.

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