Display

Abstract

The invention provides a display which can cope with position detection of both a finger and an electromagnetic induction pen, does not hinder narrowing of a bezel, and can avoid an increase in the circuit scale of a sensor controller. This display is provided with: a display layer (10) that includes light-emitting elements (30) disposed within a display region (A1), and a pixel drive circuit (35) that controls the on / off of the light-emitting elements (30); an encapsulation layer (13) that encapsulates the display layer (10); linear electrodes (52, 53) provided on the upper side of the encapsulation layer (13); and a routing line (60), one end of which is connected to the linear electrode (52). A switching circuit (70), which is connected to the other end of the routing line (60), is disposed in the display layer (10) within the display region (A1) and switches between a first mode in which the linear electrodes (52, 53) are used to detect the induced current and a second mode in which the linear electrodes (52, 53) are used to detect the capacitance.

Description

Technical Field

[0001] The present invention relates to a display, and in particular to a display using on-cell technology. Background Art

[0002] In recent years, technology that places linear electrodes on the top surface of displays (hereinafter referred to as "on-cell technology") for detecting the position of a finger on the panel has garnered attention. For example, in on-cell technology for organic EL (electroluminescence) displays, the linear electrodes are formed on the top surface of the encapsulation layer that encapsulates the display layer (the layer where the light-emitting elements and pixel driver circuits are located). Examples of this on-cell technology are disclosed in Patent Documents 1 and 2.

[0003] [Prior art literature]

[0004] [Patent Document]

[0005] [Patent Document 1] U.S. Patent No. 10,739,889

[0006] [Patent Document 2] U.S. Patent No. 11,462,597 Summary of the Invention

[0007] [Problems to be Solved by the Invention]

[0008] However, the inventors of this application have investigated the use of the aforementioned linear electrode group to detect the position of an electromagnetic induction pen using electromagnetic induction, in addition to electrostatic capacitance-based finger position detection. In this case, the linear electrode group requires a switching circuit that time-shares and switches between applying the voltage for detecting electrostatic capacitance and applying the current for detecting the induced current. Previous considerations for locating this switching circuit include the frame area A2 (the area outside the display area) or within the sensor controller, an integrated circuit that applies voltage and current to the touch electrode group. However, the former approach would hinder the narrowing of the frame, while the latter would increase the circuit size of the sensor controller.

[0009] Therefore, one object of the present invention is to provide a display capable of detecting the position of both a finger and an electromagnetic induction pen without hindering frame narrowing and avoiding an increase in the circuit scale of a sensor controller.

[0010] Furthermore, the circuits for applying voltage and current to the linear electrode groups (the linear electrode group drive circuits) typically require the use of CMOS (Complementary Metal-Oxide-Semiconductor) at the output stage. However, the MOSFETs that make up the pixel drive circuits of displays are generally available in either P-channel or N-channel types. Therefore, integrating the linear electrode group drive circuits within the display layer requires processes such as ion implantation, which significantly increases display manufacturing costs.

[0011] Therefore, one object of the present invention is to provide a display in which a driving circuit for a linear electrode group is arranged in a display layer and an increase in the manufacturing cost of the display can be avoided.

[0012] [Means for solving the problem]

[0013] A display according to one aspect of the present invention includes: a display layer including a light-emitting element group arranged in a display area and a pixel driving circuit for controlling the lighting / extinguishing of the light-emitting element group; an encapsulation layer for encapsulating the display layer; a linear electrode group arranged on the upper side of the encapsulation layer; and a routing circuit having one end connected to the linear electrode group, a switching circuit being arranged in the display layer within the display area, the switching circuit being connected to the other end of the routing circuit for switching between a first mode in which the linear electrode group is used for induced current detection and a second mode in which the linear electrode group is used for electrostatic capacitance detection.

[0014] A display according to another aspect of the present invention includes: a display layer including a light-emitting element group arranged in a display area and a pixel driving circuit for controlling the lighting / extinguishing of the light-emitting element group; a linear electrode group arranged to overlap the display layer; and a driving circuit for the linear electrode group arranged in the display layer, wherein the channel type of one or more MOSFETs constituting the driving circuit are all the same.

[0015] [Effects of the Invention]

[0016] According to one aspect of the present invention, since a switching circuit is arranged in the display layer within the display area, it is possible to handle position detection of both a finger and an electromagnetic induction pen without hindering frame narrowing and avoiding an increase in the circuit scale of the sensor controller.

[0017] According to another aspect of the present invention, since the driving circuits for the linear electrode groups arranged in the display layer are all composed of the same channel type MOSFET, it is possible to arrange the driving circuits for the linear electrode groups in the display layer while avoiding an increase in the manufacturing cost of the display. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a diagram showing the configuration of a computer 1 according to the first embodiment of the present invention.

[0019] Figure 2 is with Figure 3 The schematic cross-sectional view of the organic EL display 2 is shown along line AA.

[0020] Figure 3 It is a plan view of the sensor layer 14 according to the first embodiment of the present invention.

[0021] Figure 4 It is a perspective view of the organic EL display 2 according to the first embodiment of the present invention.

[0022] Figure 5 1 and 2 are diagrams showing the internal configuration of the switching circuits 70 and 71 according to the first embodiment of the present invention.

[0023] Figure 6 This is a diagram for explaining the content of control performed by the sensor controller 4 in the computer 1 according to the first embodiment of the present invention.

[0024] Figure 7 is with Figure 3 The schematic cross-sectional view of the organic EL display 2 is shown along line BB.

[0025] Figure 8 is with Figure 3 The schematic cross-sectional view of the organic EL display 2 is shown along line CC.

[0026] Figure 9 This is a diagram showing the configuration and operation of a driving circuit that generates transmission signals Tx<0> to Tx<6>.

[0027] Figure 10 This is a diagram showing the configuration and operation of a driving circuit that generates transmission signals Tx<0> to Tx<6>.

[0028] Figure 11 This is a diagram showing the configuration and operation of a driving circuit that generates transmission signals Tx<0> to Tx<6>.

[0029] Figure 12 This is a diagram showing the configuration and operation of a driving circuit that generates transmission signals Tx<0> to Tx<6>.

[0030] Figure 13 Yes Figures 9 to 12 The shift register SR shown <k>and selection circuit SE <k>A more specific structural diagram.

[0031] Figure 14 It represents the shift register SR <k>The shift register S contained in <0> Diagram of the internal structure.

[0032] Figure 15 1 is a diagram showing the results of the operations of the analog register circuit 80 and the buffer circuit 81 .

[0033] Figure 16 8 is a diagram showing the results of simulating the operations of the register circuit 80 , the buffer circuit 81 , and the shift circuit 82 .

[0034] Figure 17 It's about Figure 16 The same simulation represents the analog shift register SR <k>A graph of the results of various signals at various levels.

[0035] Figure 18 It means about Figure 16 The same simulation is performed, and the results of simulating various signals of each stage of the shift register SR<k> are shown.

[0036] Figure 19 It's about Figure 16 The same simulation represents the analog shift register SR <k>A graph of the results of various signals at various levels.

[0037] Figure 20 It means about Figures 16 to 19 This figure shows the results of the same simulation performed on various signals of the selection circuit SE<0>.

[0038] Figure 21 It means about Figures 16 to 20 The same simulation, simulation from the selection circuit SE <0> ~SE <3> Output transmission signal Tx <0> ~Tx <3> Graph of the results.

[0039] Figure 22 This is a diagram for explaining the content of control performed by the sensor controller 4 in the computer 1 according to the modified example of the first embodiment of the present invention.

[0040] Figure 23 It is a plan view of the sensor layer 14 according to the second embodiment of the present invention.

[0041] Figure 24 It is a perspective view of an organic EL display 2 according to a second embodiment of the present invention.

[0042] Figure 25 This is a diagram for explaining the content of control performed by the sensor controller 4 in the computer 1 according to the second embodiment of the present invention.

[0043] Figure 26 It is a plan view of the sensor layer 14 according to the third embodiment of the present invention.

[0044] Figure 27 It is a perspective view of an organic EL display 2 according to a third embodiment of the present invention.

[0045] Figure 28 1 and 2 are diagrams showing the internal configurations of the switching circuits 72 , 74 , and 75 according to the third embodiment of the present invention.

[0046] Figure 29 This is a diagram for explaining the content of control performed by the sensor controller 4 when the computer 1 enters the second mode according to the third embodiment of the present invention.

[0047] Figure 30 This is a diagram for explaining the content of control performed by the sensor controller 4 when the computer 1 enters the first mode according to the third embodiment of the present invention.

[0048] Figure 31 1 and 2 are diagrams showing the configuration of an organic EL display 2 and the internal configuration of switching circuits 73 to 75 according to a fourth embodiment of the present invention.

[0049] Figure 32 This is a diagram for explaining the content of control performed by the sensor controller 4 when the computer 1 enters the second mode according to the present embodiment.

[0050] Figure 33 This is a diagram explaining the content of control performed by the sensor controller 4 when the computer 1 enters the first mode according to the present embodiment.

[0051] Figure 34 This is a diagram explaining the content of control performed by the sensor controller 4 when the computer 1 enters the first mode according to the present embodiment.

[0052] Figure 35 This is a diagram for explaining the content of control performed by the sensor controller 4 when the computer 1 enters the first mode according to the modification of the fourth embodiment of the present invention.

[0053] Figure 36 This is a diagram for explaining the content of control performed by the sensor controller 4 when the computer 1 enters the first mode according to the modification of the fourth embodiment of the present invention.

[0054] Figure 37 It is a plan view of the sensor layer 14 according to the fifth embodiment of the present invention.

[0055] Figure 38 It is a perspective view of an organic EL display 2 according to a fifth embodiment of the present invention.

[0056] Figure 39 It is a diagram showing the appearance of the upper surface of the planarization insulating film 24 of the organic EL display 2 according to the fifth embodiment of the present invention. DETAILED DESCRIPTION

[0057] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0058] Figure 1 This figure shows the structure of a computer 1 according to a first embodiment of the present invention. As shown in this figure, the computer 1 according to this embodiment includes an organic EL display 2, a main processor 3, and a sensor controller 4. While this embodiment describes an example in which the present invention is applied to a computer 1 having an organic EL display 2, the present invention can also be suitably applied to other types of displays, such as liquid crystal displays.

[0059] exist Figure 1 In the perspective view of the organic EL display 2 shown, the upper side is the panel surface. As shown in the figure, the organic EL display 2 has a layer structure comprising, in order from the side away from the panel surface, a circuit layer 11, an organic EL layer 12, an encapsulation layer 13, and a sensor layer 14. The circuit layer 11 and the organic EL layer 12 constitute the display layer 10, which is equipped with the components that realize the display function of the organic EL display 2 (such as the light-emitting element 30 and pixel drive circuit 35 described later). The sensor layer 14 is equipped with the components that detect the position of the electromagnetic induction pen P and the finger E within the panel surface (such as the linear electrodes 52 and 53 described later).

[0060] Figure 1 The area A1 represented by a rectangle in FIG. 1 represents the display area of the organic EL display 2. The outer side of the display area A1 is the frame area A2. Figure 1 As shown, a plurality of wirings SL and a terminal region 16 including a plurality of terminals are arranged in the frame region A2. The plurality of wirings SL are provided to connect the circuit layer 11, the organic EL layer 12, and the circuits, wirings, electrodes, etc. arranged in the sensor layer 14 with the terminals in the terminal region 16. Figure 1 Schematically illustrating only a portion of the plurality of wirings SL actually provided in the organic EL display 2 . Each terminal in the terminal region 16 is connected to the host processor 3 or the sensor controller 4 via wiring provided outside the organic EL display 2 .

[0061] Figure 2 This is a schematic cross-sectional view of the organic EL display 2. Figure 3 The cross section of the organic EL display 2 corresponding to the line AA shown is a schematic cross-sectional view for understanding the structure. Figure 2 The structure shown is Figure 3 The structures shown are not necessarily consistent. This is for the following Figure 7 as well as Figure 8 The same is true. Figure 2 As shown in FIG. 1 , the circuit layer 11, the organic EL layer 12, the encapsulation layer 13 and the sensor layer 14 are sequentially stacked on the surface of the substrate 20. Figure 2 The outline of the structure of the organic EL display 2 will be described.

[0062] The circuit layer 11 is a layer including a plurality of pixel driving circuits 35 arranged in a matrix, and is composed of a buffer layer 21, a gate insulating film 22, an interlayer insulating film 23, and a planarizing insulating film 24 in order from the substrate 20 side. The pixel driving circuit 35 is an active element provided for each pixel, and is specifically composed of a P-channel MOSFET. Figure 2 As shown, the pixel driving circuit 35, which is a P-channel MOSFET, is configured to include a semiconductor layer 36 forming a channel region, a gate electrode 37 disposed on the upper side of the semiconductor layer 36 via a gate insulating film 22, a drain electrode 38, and a source electrode 39. The drain electrode 38 and the source electrode 39 are respectively composed of a via conductor that penetrates the gate insulating film 22 and the interlayer insulating film 23 and contacts the semiconductor layer 36 at the lower end, and a conductor formed on the upper surface of the interlayer insulating film 23.

[0063] Although not shown in the figure, the circuit layer 11 is further configured to include a plurality of gate lines extending along the row direction of the pixel matrix and a plurality of data lines extending along the column direction of the pixel matrix. Each gate line is connected to a gate electrode 37 of each of the plurality of pixel driving circuits 35 arranged along the corresponding row. Each data line is connected to a source electrode 39 of each of the plurality of pixel driving circuits 35 arranged along the corresponding column. In addition, each gate line and each data line are connected via Figure 1 The wiring SL shown is connected to the main processor 3 .

[0064] The organic EL layer 12 includes a plurality of light-emitting elements 30 (a light-emitting element group) arranged in a matrix. It comprises, in order from the substrate 20 side, an anode electrode 31, a bank layer 25, a light-emitting layer 32, and a cathode electrode 33. The anode electrode 31 is a conductive film formed on the upper surface of the planarizing insulating film 24 and is provided separately for each pixel. The planarizing insulating film 24 has a through-hole at a position where the drain electrode 38 of each pixel driver circuit 35 is exposed. The anode electrode 31 contacts the drain electrode 38 of the corresponding pixel driver circuit 35 through the portion formed in this through-hole.

[0065] The bank layer 25 is an insulating film provided to separate adjacent pixels and improve the efficiency of light extraction from the light-emitting layer 32. The light-emitting layer 32 is a thin film of an organic material that emits light when current flows through it. The specific composition of the organic material constituting the light-emitting layer 32 is selected for each pixel to emit light in the designated color. The bank layer 25 has through-holes at locations where each anode electrode 31 is exposed. The light-emitting layer 32 contacts the corresponding anode electrode 31 through the portion formed within these through-holes.

[0066] The cathode electrode 33 is a conductive film formed on the upper surface of the light emitting layer 32 and is provided in common to each pixel. Although not shown, the organic EL layer 12 has a main processor 3 through the Figure 1 The wiring SL shown is a ground wiring supplied with a ground potential, and is connected to the ground wiring. A structure in which a light-emitting layer 32 is sandwiched between an anode electrode 31 and a cathode electrode 33 is formed at each pixel position, thereby forming a light-emitting element 30.

[0067] Here, the operation of the light-emitting element 30 and pixel drive circuit 35 is briefly described. The main processor 3 generates an image signal by executing a program stored in a memory (not shown) and drives the gate and data lines based on the generated image signal. Specifically, the following process is performed: the brightness of each pixel is determined based on the generated image signal, one gate line is activated, and a drive current corresponding to the determined brightness for each pixel arranged along this gate line is supplied to each data line. The main processor 3 repeats this process while switching the activated gate line.

[0068] When a gate line is activated by the host processor 3, the multiple pixel drive circuits 35 arranged along the corresponding row are simultaneously turned on, and the anode electrodes 31 of the corresponding light-emitting elements 30 are connected to the data lines. In this state, the host processor 3 supplies a voltage corresponding to the brightness of each pixel to each data line, causing the multiple light-emitting elements 30 along the corresponding row to emit light simultaneously. This achieves display according to the image signal.

[0069] return Figure 2 The encapsulation layer 13 is a layer that protects the light-emitting layer 32 from external moisture and oxygen and is formed to encapsulate the entire surface of the display area A1. The encapsulation layer 13 has a structure in which an inorganic layer 41, such as glass or metal, an organic layer 42, such as a polymer, and an inorganic layer 43, such as glass or metal, are stacked in this order from the substrate 20 side. An insulating film, or dam 44, is formed at the edge of the display area A1 to prevent damage to the encapsulation layer 13. The dam 44 extends to surround the periphery of the display area A1.

[0070] The sensor layer 14 is provided with a Figure 1 The touch sensor layer for the electromagnetic induction pen P and finger E shown in the panel surface is composed of an insulating film 50, an insulating film 51, a bridge conductor 55, a linear electrode 52, a linear electrode 53, and a protective film 56 in this order from the substrate 20 side. The linear electrodes 52 and 53 are conductive films formed on the upper surface of the insulating film 51 and extend in the y direction and the x direction, respectively. The details of the structure of the linear electrodes 52 and 53 will be referred to later. Figures 3 to 6 Detailed explanation will be given separately.

[0071] The bridge conductor 55 is a conductor formed on the upper surface of the insulating film 50 and is provided to achieve the intersection of the linear electrode 52 and the linear electrode 53. Figure 1 In the example shown, the linear electrode 52 extending in the y direction is interrupted at the location where it intersects the linear electrode 53. The two ends of the linear electrode 52 formed by the interruption are connected to the bridge conductor 55 via a through-hole conductor that penetrates the insulating film 51. In this way, the linear electrode 52 and the linear electrode 53 can intersect without being electrically interrupted.

[0072] Figure 3 is a top view of the sensor layer 14. Figure 4 2 is a perspective view of the organic EL display 2. Figure 3 In FIG, a part of the structure included in the circuit layer 11 and the wiring SL are also shown with dotted lines. Figure 4 In the figure, the organic EL layer 12 and the encapsulation layer 13 are shown only in their positions by dotted lines, and the circuit layer 11 is shown only in part of its structure. Figure 3 and Figure 4 , the structure for detecting the positions of the electromagnetic induction pen P and the finger E within the panel surface is described in detail.

[0073] like Figure 3 as well as Figure 4 As shown in FIG. 1 , the sensor layer 14 is configured to include a linear electrode group consisting of a plurality of linear electrodes 52 and 53. Each linear electrode 52 and 53 is formed of a solid conductor as a rectangular conductive film. Figure 3 and Figure 4 Although only five linear electrodes 52 and ten linear electrodes 53 are shown, in reality, many more linear electrodes 52 and 53 are provided. Furthermore, the circuit layer 11 is configured to include switching circuits 70-72 and driving lines 90-93. Both the switching circuits 70-72 and the driving lines 90-93 are arranged within the display area A1.

[0074] The linear electrodes 52 are two linear conductors extending in the y-direction, connected at their other ends in the y-direction (the ends away from the terminal area 16). In the sensor layer 14, multiple linear electrodes 52 having this shape are arranged at equal intervals in the x-direction. The ends of each linear electrode 52 are connected to a switching circuit 70 within the circuit layer 11 via a routing line 60 extending from the sensor layer 14 to the circuit layer 11. From the perspective of the switching circuit 70, each linear electrode 52 forms a toroidal coil.

[0075] The linear electrodes 53 are linear conductors extending in the x-direction. In the sensor layer 14, multiple linear electrodes 53 having this shape are arranged at equal intervals in the y-direction. One end of each linear electrode 53 in the x-direction is connected to a switching circuit 71 within the circuit layer 11 via a routing line 61 extending from the sensor layer 14 to the circuit layer 11, and the other end is connected to a switching circuit 72 within the circuit layer 11 via a routing line 62 extending from the sensor layer 14 to the circuit layer 11.

[0076] Switching circuits 70-72 are circuits used by the sensor controller 4 to switch between a first mode using the linear electrodes 52, 53 for induced current detection and a second mode using the linear electrodes 52, 53 for electrostatic capacitance detection. The first mode detects the induced current generated in the linear electrodes 52 by the electromagnetic induction pen P in response to the alternating magnetic field transmitted from the linear electrodes 53. When in the first mode, the sensor controller 4 detects the position of the electromagnetic induction pen P based on the induced current detection results. On the other hand, the second mode detects the electrostatic capacitance at each intersection between the linear electrodes 53 and 52 by detecting the voltage signal generated in the linear electrodes 52 in response to the voltage signal supplied to the linear electrodes 53. When in the second mode, the sensor controller 4 detects the position of the finger F based on the electrostatic capacitance detection results.

[0077] More specifically, switching circuit 70 extracts an induced current or voltage signal from each linear electrode 52 in each of the first and second modes and outputs it as a received signal Rx to sensor controller 4. Switching circuits 71 and 72 apply an alternating current to each linear electrode 53 to generate an alternating magnetic field in the first mode, and apply a voltage signal to each linear electrode 53 in the second mode.

[0078] Figure 5 70 and 71. FIG. 70 is a diagram showing the internal structure of the switching circuits 70 and 71. Although the switching circuit 72 is not shown in this figure, the structure of the switching circuit 72 in this embodiment is the same as that of the switching circuit 71.

[0079] like Figure 5 As shown, the switching circuit 70 includes: one or more receiving circuits 100 for extracting the received signal Rx from each linear electrode 52 in the first mode; one or more receiving circuits 101 for extracting the received signal Rx from each linear electrode 52 in the second mode; and a selection circuit 102 for selectively connecting each linear electrode 52 to any one of the receiving circuits 100, 101 or another linear electrode 52. Under the control of the sensor controller 4, the receiving circuit used and the connection destination of each linear electrode 52 are switched in a time-division manner while extracting the received signal Rx from each linear electrode 52.

[0080] The switching circuit 71 includes one or more drive circuits 110 that generate an AC current i using a drive signal (described later) supplied from the sensor controller 4 to the drive lines 90 and 91. A 、i B (described later) and applied to the linear electrode 53; one or more driving circuits 111, using the driving signal (described later) supplied from the sensor controller 4 to the driving lines 90, 91 to generate a transmission signal Tx as a voltage signal <0> ~Tx <6> (described later), and applies it to the linear electrode 53; and a selection circuit 112, which selectively connects each linear electrode 53 to any one of the drive circuits 110 and 111, and applies current or voltage to each linear electrode 53 while switching the drive circuit used and the connection target of each linear electrode 53 in a time-sharing manner according to the control from the sensor controller 4.

[0081] Figure 6 This is a diagram explaining the content of control performed by the sensor controller 4 in the computer 1 according to the present embodiment. Figure 6 (a) shows the content of control performed by the sensor controller 4 when detecting the position of the electromagnetic induction pen P. Figure 6 (b) shows the content of control performed by the sensor controller 4 when detecting the position of the finger F. Hereinafter, the operation of the switching circuits 70 to 72 will be described with reference to these figures.

[0082] First, refer to Figure 6 (a), the sensor controller 4 enters the first mode and controls the switching circuits 71 and 72 so that the plurality of linear electrodes 53 except the two at each end in the y direction are selected one by one, and the alternating current i is intermittently applied to each of the two linear electrodes 53 adjacent to the selected linear electrode 53 multiple times each time. A or AC current i B In addition, the sensor controller 4 controls the switching circuit 70 so that each time the switching circuits 71 and 72 select one linear electrode 53, one of the plurality of linear electrodes 52 other than the one located at each end in the x direction is sequentially selected, and the reception signal Rx is taken out from the selected linear electrode 52 and the linear electrodes 52 adjacent to the selected linear electrode 52 on both sides. The sensor controller 4 adjusts the timing so that the reception signal Rx is taken out at the same time as the AC current i A 、i B This is done immediately after the supply is stopped while controlling the switching circuits 70 to 72.

[0083] AC current i A It is a current that vibrates at a certain frequency and phase. The alternating current i B Is to make the alternating current i A The current is the phase inversion of the current. The typical AC current i A 、i B The sensor controller 4 causes the switching circuit 71 to supply an AC current i to two linear electrodes 53 adjacent to one side of the selected linear electrode 53 in the y direction. A , supplying an AC current i to the two linear electrodes 53 adjacent to the other side in the y direction. B On the other hand, the switching circuit 72 supplies the AC current i to the two linear electrodes 53 adjacent to one side of the selected linear electrode 53 in the y direction in synchronization with the switching circuit 71. B , supplying an AC current i to the two linear electrodes 53 adjacent to the other side in the y direction. A As a result, an alternating magnetic field is generated above the selected linear electrode 53 , and when the coil constituting the resonant circuit in the electromagnetic induction pen P enters the alternating magnetic field, the electromagnetic induction pen P sends out the alternating magnetic field as a reflected signal.

[0084] Figure 6 The differential amplifier 70a shown in (a) is Figure 5 The switching circuit 70 uses a specific example of the receiving circuit 100 shown in FIG. Figure 5 The selection circuit 102 shown in FIG. 1 connects three linear electrodes 52 including the selected linear electrode 52 in series, and connects both ends of the three linear electrodes 52 to the differential amplifier 70a. A 、i B The signal output from the differential amplifier 70 a immediately after the supply of φ is completed is supplied to the sensor controller 4 as the reception signal Rx.

[0085] The sensor controller 4 obtains the signal strength of the received signal Rx supplied from the switching circuit 70 for each combination of linear electrodes 52 and 53 selected by the switching circuits 70 and 72, and derives the position (two-dimensional position) of the electromagnetic induction pen P based on the distribution (distribution within the panel surface). Specifically, the position corresponding to the vertex of the distribution is derived as the position of the electromagnetic induction pen P. Furthermore, if the sensor controller 4 has a function for modulating the frequency of the alternating magnetic field transmitted by the electromagnetic induction pen P using data (such as the pressure value indicating the pressure applied to the pen tip of the electromagnetic induction pen P, a value indicating the on / off status of a switch provided on the electromagnetic induction pen P, or a pen ID pre-assigned to the electromagnetic induction pen P), the sensor controller 4 also performs processing to obtain the data transmitted by the electromagnetic induction pen P by demodulating the received signal Rx supplied from the switching circuit 70. The sensor controller 4 is configured to supply the derived position and the obtained data to the main processor 3 at each instance.

[0086] Next, refer to Figure 6 In (b), sensor controller 4 enters the second mode and controls switching circuits 71 and 72 to sequentially select the plurality of linear electrodes 53 in order of seven, and to supply transmission signals Tx<0> to Tx<6> to the selected seven linear electrodes 53. Furthermore, sensor controller 4 controls switching circuit 70 so that each time switching circuits 71 and 72 select seven linear electrodes 53, the plurality of linear electrodes 52 are sequentially selected one by one, and reception signal Rx is obtained from each selected linear electrode 52.

[0087] The transmission signals Tx<0> to Tx<6> are AC signals having phases represented by the columns of the 7×7 matrix A shown in the following equation (1). In the matrix A, "+1" corresponds to a phase of 0° and "+1" corresponds to a phase of 180°. A typical transmission signal Tx <0> ~Tx <6> The switching circuits 71 and 72 are configured to sequentially generate transmission signals Tx<0> to Tx<6> corresponding to the respective columns of the matrix A and supply them to the corresponding linear electrodes 53 .

[0088] [Formula 1]

[0089]

[0090] Here, the matrix A represents an M-sequence code. By constructing the matrix A from the M-sequence code, the next column can be constructed by shifting the elements of each column by one, thereby simplifying the structure of the circuit for generating the transmission signals Tx<0> to Tx<6>. The specific structure of this circuit will be referred to later. Figures 9 to 21 Detailed description is provided below. However, matrix A does not necessarily require an M-sequence code; it can be constructed using any code, such as a Walsh code, an OVSF (Orthogonal Variable Spreading Factor) code, or a Bayesian code. Furthermore, matrix A can also be constructed using a matrix other than a 7×7 matrix. In this case, sensor controller 4 causes switching circuits 71 and 72 to select a number of linear electrodes 53 equal to the number of rows in matrix A.

[0091] Figure 6 The operational amplifier 70b shown in (a) is Figure 5 The specific example of the receiving circuit 101 shown in FIG. The inverting input terminal of the operational amplifier 70b is grounded. In addition, a parallel capacitor is provided in the operational amplifier 70b for removing high frequency noise. The switching circuit 70 uses Figure 5 The selection circuit 102 shown connects the two ends of the selected linear electrode 52 to the non-inverting input terminals of the operational amplifier 70b, and supplies a series of signals output from the operational amplifier 70b as the receiving signal Rx to the sensor controller 4 during the period when the switching circuits 71 and 72 sequentially supply the transmission signals Tx<0> to Tx<6> corresponding to the columns of the matrix A.

[0092] Here, if the element of the xth column of matrix A is represented as A x1 、A x2 ..., let the electrostatic capacitance formed between the linear electrode 52 selected by the switching circuit 70 and the seven linear electrodes 53 selected by the switching circuits 71 and 72 be represented by C1, C2, ..., then the reception signal Rx_TP supplied from the operational amplifier 70b to the sensor controller 4 becomes the value shown in the following formula (2).

[0093] [Formula 2]

[0094]

[0095] Therefore, the received signal Rx obtained as a result of the switching circuits 71 and 72 supplying the transmission signals Tx<0> to Tx<6> corresponding to the columns of the matrix A to the linear electrodes 53 is represented as a whole by the vector b shown in the following equation (3). T is the transposed matrix of matrix A.

[0096] [Formula 3]

[0097]

[0098] The sensor controller 4 performs the calculation shown on the left side of the following equation (4) on the vector b to separate and obtain the electrostatic capacitance of each linear electrode 53. T ) -1 is the matrix A T As shown in formula (4), if the matrix A T Multiply by the matrix (A T ) -1 , then it becomes the unit matrix I. Therefore, by performing this calculation, the sensor controller 4 can separate and obtain the electrostatic capacitance of the intersection of the linear electrode 52 selected by the switching circuit 70 and the seven linear electrodes 53 selected by the switching circuits 71 and 72, as shown in the right side of the formula (4).

[0099] [Formula 4]

[0100]

[0101] The sensor controller 4 performs the same calculation as equation (4) each time the selection of switching circuits 70 to 72 is switched, thereby deriving the capacitance at each intersection of linear electrodes 52 and 53. The sensor controller 4 then derives the position (two-dimensional position) of the finger F based on the distribution of each derived capacitance within the panel surface. Specifically, the position corresponding to the vertex of the distribution is derived as the position of the finger F. The sensor controller 4 is configured to provide the derived position to the main processor 3 each time the derived position is obtained.

[0102] return Figure 3 and Figure 4 The driving lines 90 to 93 are used to supply the AC current i generated by the sensor controller 4 to the switching circuits 71 and 72. A , AC current i B And the wiring of the drive signal required to send the signal Tx<0>~Tx<6>. A specific example will be given later for explanation, but the drive signal Tx_clk (first drive signal) supplied to the drive lines 90 and 92 and the drive signal xTx_clk (second drive signal) supplied to the drive lines 91 and 92 become AC signals with opposite phases to each other. The drive signals Tx_clk and xTx_clk can be AC signals such as sine wave signals, or signals (rectangular wave signals) generated by turning on and off the switch. The switching circuit 71 generates an AC current i based on the drive signals Tx_clk and xTx_clk supplied from the sensor controller 4 through the drive lines 90 and 91. A 、i B And send signal Tx <0> ~Tx <6> The switching circuit 72 generates an AC current i based on the drive signals Tx_clk and xTx_clk supplied from the sensor controller 4 via the drive lines 92 and 93. A 、i B And send signal Tx <0> ~Tx <6> .

[0103] Herein, reference is made to the Figure 2 The structures of the routing lines 60 and 61 and the wiring SL will be described in detail with reference to a cross-sectional view of the organic EL display 2. The structure of the routing line 62 is the same as that of the routing line 61.

[0104] First, refer again Figure 2 , the structure of the routing line 60 is shown in the figure. As shown in the figure, the routing line 60 is composed of a wiring 60a formed on the upper surface of the gate insulating film 22, a pad electrode 60b formed on the upper surface of the interlayer insulating film 23, a through-hole conductor 60c connecting them, and an extension portion 60d of the conductive film constituting the linear electrode 52. Among them, the pad electrode 60b and the through-hole conductor 60c are arranged in the frame area A2. The wiring 60a is formed in a manner that is embedded under the dam 44, and serves to connect the switching circuit 70 in the display area A1 with the through-hole conductor 60c in the frame area A2. The extension portion 60d is formed in a manner that passes over the upper side of the dam 44, and is connected to the upper surface of the pad electrode 60b through a portion formed in the through hole VH1 provided in the frame area A2.

[0105] As can be seen from the above structure, the routing line 60 extends from the upper side of the encapsulation layer 13 to the lower side, wrapping around the dam 44 that forms the edge of the encapsulation layer 13. By adopting this routing line 60 structure, the organic EL display 2 of this embodiment can place the switching circuit 70 within the display area A1. Furthermore, because the pixel drive circuit 35 is smaller than the organic EL layer 12, there is ample space within the circuit layer 11 within the display area A1 for arranging the switching circuit 70. In this embodiment, this space is utilized to arrange the switching circuit 70.

[0106] Figure 7 Is to express Figure 3 A schematic cross-sectional view of the organic EL display 2 corresponding to the cross-section of the BB line shown. The structure of the routing line 61 is shown in this figure. As shown in the figure, the routing line 61 is the same as the routing line 60, and is composed of a wiring 61a formed on the upper surface of the gate insulating film 22, a pad electrode 61b formed on the upper surface of the interlayer insulating film 23, a through-hole conductor 61c connecting them, and an extension portion 61d of the conductive film constituting the linear electrode 53. Among them, the pad electrode 61b and the through-hole conductor 61c are arranged in the frame area A2. The wiring 61a is formed in a manner that is embedded under the dam 44 and serves to connect the switching circuit 71 in the display area A1 and the via conductor 61c in the frame area A2. The extension portion 61d is formed in a manner that passes over the barrier 44 and is connected to the upper surface of the pad electrode 61b through a portion formed in the through hole VH2 provided in the frame area A2.

[0107] As can be seen from the above structure, routing line 61 also extends from the upper side to the lower side of encapsulation layer 13, wrapping around dam 44 forming the edge of encapsulation layer 13. By adopting this structure of routing line 61, switching circuit 71 can also be arranged within display area A1 in the organic EL display 2 of this embodiment.

[0108] here, Figure 7 Also shown are driving lines 90 and 91. As shown in this figure, the driving lines 90 and 91 extend on the upper surface of the interlayer insulating film 23, similarly to the data lines.

[0109] Figure 8 Is to express Figure 3 A schematic cross-sectional view of the organic EL display 2 corresponding to the cross-section of the CC line shown. In this figure, the structure of the wiring SL for leading the switching circuit 70 to the terminal area 16 is shown. As shown in the figure, the wiring SL is composed of a wiring SLa formed on the upper surface of the gate insulating film 22, a pad electrode SLb formed on the upper surface of the interlayer insulating film 23, and a through-hole conductor SLc connecting them. The wiring SLa is formed to be immersed under the dam 44, and plays the role of connecting the switching circuit 70 in the display area A1 with the through-hole conductor SLc in the frame area A2. The upper surface of the pad electrode SLb is exposed at the bottom surface of the through hole VH3 provided by penetrating the protective film 56, etc., and is connected to the pad electrode 16a provided on the inner surface of the through hole VH3. The pad electrode 16a is an electrode that functions as a terminal in the terminal area 16, and is connected to the through-hole conductor SLc through the wiring not shown in the figure. Figure 1 The sensor controller 4 is shown connected.

[0110] Next, the structure of the switching circuit 71 disposed in the display area A1 will be specifically described using the driving circuit 111 that generates and supplies the transmission signals Tx<0> to Tx<6> as an example. The following description uses the structure of the switching circuit 71 as an example, but the structure of the switching circuit 72 is similar. Furthermore, the description uses the driving circuit 111 that generates and supplies the transmission signals Tx<0> to Tx<6> as an example, but the AC current i A 、i B The structure of the driving circuit 110 for generating / supplying is also the same.

[0111] Figures 9 to 12 1 is a diagram showing the structure and operation of the driving circuit 111 provided in the switching circuit 71. Figure 9 As shown in FIG. 1 , the switching circuit 71 is configured to include seven drive circuits 111 that generate transmission signals Tx<0> to Tx<6>, respectively. Each drive circuit 111 is configured to include a shift register SR <k>(k is an integer from 0 to 6) and selection circuit SE <k>.

[0112] The sensor controller 4 sequentially supplies data signals Code and xCode, each representing a phase setting value ("+1" or "+1"), to the shift register SR<0> bit by bit. The data signal Code (first data signal) is a binary signal that is active-low when the setting value is "+1," while the data signal xCode (second data signal) is a binary signal that is active-low when the setting value is "-1." The separate provision of the data signal Code representing the setting value "+1" and the data signal xCode representing the setting value "-1" allows the driver circuit 111 to be constructed using only MOSFETs of the same channel type. That is, for example, a drive circuit 111 constructed using only P-channel MOSFETs can only output signals for low inputs. Therefore, even if a binary signal in which "+1" is represented by high and "-1" is represented by low is input, only "-1" can be output. However, in this embodiment, both "+1" and "-1" are input using low. Therefore, by constructing a drive circuit 111 using only P-channel MOSFETs, both "+1" and "-1" can be output.

[0113] In addition, for each shift register SR <k>At least two clock signals, CK2 and CK3, are supplied from the sensor controller 4. Both clock signals CK2 and CK3 oscillate between the ground potential VGL (specifically, -7V) and the power supply potential VGH (VGH>VGL, specifically, 7V). Clock signal CK2 indicates the timing of reading the data signals Code and xCode and outputting them to the next stage, while clock signal CK3 indicates the timing of sending data signals to the corresponding selection circuit SE. <k>The output timing function.

[0114] Shift register SR <k>This circuit takes in the value supplied by the data signals Code and xCode at the activation timing of the clock signal CK2 and sets it to itself, outputs it to the next stage at the activation timing of the next clock signal CK2, and outputs the value set to itself to the selection circuit SE at the activation timing of the clock signal CK3. <k>. From the shift register SR <k>Direction selection circuit SE <k>The output uses two data signals iCode <k>、xiCode <k>To achieve. Data signal iCode <k>When the phase setting value is "+1", it is a low active binary signal that becomes low. The data signal xiCode <k>It is a binary signal that becomes low and active low when the phase setting value is "-1".

[0115] For the selection circuit SE <k>The sensor controller 4 supplies the driving signals Tx_clk and xTx_clk via the driving lines 90 and 91. <k>According to the data signal iCode <k>The output drive signal Tx_clk is activated according to the data signal xiCode <k>The circuit that outputs the driving signal xTx_clk when the circuit is activated. <k>The output is used as the transmit signal Tx <k>Supplied to the linear electrode 53 .

[0116] Reference Figures 9 to 12 To explain in detail, first, Figure 9 As shown, the sensor controller 4 is used to control the shift register SR <0> , starting from the lower element of matrix A, 1 bit of data signals Code and xCode corresponding to the 7 bits in the first column from the left of matrix A are sequentially supplied at every clock of clock signal CK2. At this stage, clock signal CK3 is not supplied, so each bit of data signals Code and xCode is not output to selection circuit SE. <k>, and is set to the next stage in synchronization with the clock signal CK2. As a result, Figure 9 As shown, the last bit of the 7-bit data signal Code, xCode is set to the shift register SR <0> At the moment, the value corresponding to the first column of matrix A is set to the shift register SR <0> ~SR <6> .

[0117] Then, if Figure 10 As shown, the sensor controller 4 activates the clock signal CK3. Then, the shift register SR <k>The value set in iCode is used as the data signal <k>、xiCode <k>Output to selection circuit SE <k>The selection circuit SE receives the signal <k>As mentioned above, if the data signal iCode <k>If the data signal xiCode is activated, the drive signal Tx_clk is output. <k>When activated, the drive signal xTx_clk is output. As a result, the transmission signals Tx<0> to Tx<6> having the phase corresponding to the first column of the matrix A are supplied to the seven linear electrodes 53 at the same time.

[0118] Then, if Figure 11 As shown, the sensor controller 4 is used to control the shift register SR <0> One clock of the clock signal CK2 is supplied, and data signals Code and xCode representing the next bit (the top value of the second column from the left of the matrix A) are supplied. <k>The value set in the shift register SR is shifted one level at a time. <0> ~SR <6> Set the value corresponding to the second column of matrix A in .

[0119] Then, if Figure 12 As shown, the sensor controller 4 activates the clock signal CK3 again. Then, the shift register SR <k>The value set in iCode is used as the data signal <k>、xiCode <k>Output to selection circuit SE <k>As a result, from each selection circuit SE <k>The transmission signal Tx having a phase corresponding to the second column of the matrix A is supplied to the seven linear electrodes 53 simultaneously. <0> ~Tx <6> .

[0120] The same process is repeated for the third through seventh columns of matrix A, supplying transmission signals Tx<0> to Tx<6> having corresponding phases to the seven linear electrodes 53. In this way, the switching circuit 71 sequentially supplies transmission signals Tx<0> to Tx<6> corresponding to each column of matrix A to the seven linear electrodes 53.

[0121] Figure 13 Yes Figures 9 to 12 The shift register SR shown <k>and selection circuit SE <k>A more detailed diagram of the structure. Figure 14 It represents the shift register SR <k>The shift register S contained in <0> (described later) is a diagram of the internal structure. Figure 13 Only a portion of the shift register SR is shown in <k>and a portion of the selection circuit SE <k>, but other shift registers SR <k>and selection circuit SE <k>The structure of is also the same. Figure 14 Only the shift register SR is shown in <0> The shift register S <0> , but other shift registers S <k>and shift register xS <k>(described later) also has the same structure.

[0122] First, refer to Figure 13 , shift register SR <k>The structure includes a shift register S <k>and shift register xS <k>Shift register S <k>and shift register xS <k>Each of the input terminals st and the direction selection circuit SE is configured to have <k>The output terminal g_out of the next stage shift register S<k+1> The output terminal c_out, clock terminals ck1, ck2 and output enable terminal o_en.

[0123] From the sensor controller 4 to the shift register S <0> The data signal Code is supplied to the input terminal st of the sensor controller 4. <0> The input terminal st supplies the data signal xCode.<k+1> The input terminal st is supplied to the shift register S of the previous stage <k>The signal SR_o is output from the output terminal c_out <k>Similarly, the shift register xS<k+1> The input terminal st is supplied to the shift register xS of the previous stage <k>The signal xSR_o is output from the output terminal c_out <k>.

[0124] Clock signals CK1 and CK2 are supplied to clock terminals ck1 and ck2 respectively from the sensor controller 4. In addition, clock signal CK3 is supplied to output enable terminal o_en from the sensor controller 4. Clock signals CK2 and CK3 are referenced to Figures 9 to 12 The clock signals CK2 and CK3 described above are the same as those of the clock signals CK1. The clock signal CK1 is also a clock signal that oscillates between the ground potential VGL and the power supply potential VGH, similarly to the clock signals CK2 and CK3.

[0125] From the shift register S <k>The output terminal g_out outputs the data signal iCode <k>. From the shift register xS <k>The output terminal g_out outputs the data signal xiCode <k>.

[0126] Next, refer to Figure 14 , shift register S <0> The structure includes a register circuit 80, a buffer circuit 81, and a shift circuit 82. The register circuit 80 is composed of transistors T10 to T17 and a capacitor C10. In addition, the buffer circuit 81 is composed of transistors T20 to T22 and capacitors C20 and C21. A to D shown in the figure represent the shift register S <0> Nodes within.

[0127] Here, all transistors within switching circuits 70-72, including transistors T10-T17 and T20-T22, are constructed using P-channel MOSFETs. Because they match the pixel driver circuit 35, which is constructed using P-channel MOSFETs, switching circuits 70-72 can be fabricated using the same process as pixel driver circuit 35. However, as a result, CMOS (Complementary Metal-Oxide-Semiconductor) cannot be used in the circuit's output stage. Therefore, switching circuits 70-72 are configured to perform a bootstrap operation that lowers the gate potential of the low-side P-channel MOSFETs in the output stage to a low level. Details of this will be described later.

[0128] Transistor T10 is connected between input terminal st and node B, with its gate connected to clock terminal ck2. Transistor T11 is connected between clock terminal ck2 and node A, with its gate connected to node B. Transistor T12 is connected between a ground wiring line supplied with ground potential VGL and node A, with its gate connected to clock terminal ck2. Transistors T13 and T14 are connected in series between a power wiring line supplied with power supply potential VGH and node B. The gate of transistor T13 is connected to node A, and the gate of transistor T13 is connected to clock terminal ck1. Transistor T15 is connected between node B and node C, with its gate connected to a ground wiring line supplied with ground potential VGL. Transistor T16 is connected between output terminal g_out and output enable terminal o_en, with its gate connected to node C. Transistor T17 is connected between output terminal g_out and a power wiring line supplied with power supply potential VGH, with its gate connected to node A. The capacitor C10 is connected between the node C and the output terminal g_out.

[0129] Transistor T20 is connected between node B and the gate of transistor T21. The gate of transistor T20 is connected to a ground wiring line supplied with ground potential VGL. Transistor T21 is connected between node D, which constitutes the input of shift circuit 82, and clock terminal ck1. Transistor T22 is connected between node D and a power supply wiring line supplied with power supply potential VGH. The gate of transistor T22 is connected to node A. Capacitor C20 is connected between node D and the gate of transistor T21. Capacitor C21 is connected between node A and the source of transistor T22.

[0130] Figure 15 80 and the buffer circuit 81. Figure 14 Refer to this Figure 15 , the operation of the register circuit 80 is described in detail. In addition, the unit of the vertical axis of this figure is "V". This point will be described later. Figures 16 to 21 The same is true in . In addition, Figure 15 The clock signals CK1 and CK3 are shown to be the same, but the clock signals CK1 and CK3 become the same signal when the shift register SR <k>Direction selection circuit SE <k>After the output of Figure 10 ). Conversely, in Figure 15 The shift register SR <k>Direction selection circuit SE <k>The output of the register circuit 80 starts from the shift register SR <k>Direction selection circuit SE <k>Before the output of (refer to the data signal Code is set in the shift register SR <0> ~SR <6> Stage Figure 9 ), the sensor controller 4 vibrates the clock signal CK1 but does not vibrate the clock signal CK3 (refer to the following Figure 16 wait).

[0131] When the clock signal CK2 becomes low at time t1, the transistor T12 is turned on, and the potential of the node A drops to low level. As a result, the transistor T17 is turned on, and the potential of the output terminal g-out, that is, the output signal iCode <0> The potential of node A becomes high. Transistor T10 is also turned on, but at this moment, the data signal Code is high, so node B is high, and transistor T11 remains off. After clock signal CK2 returns to high, when clock signal CK1 goes low at time t2, transistor T14 turns on. At this moment, since the potential of node A is low, transistor T13 is also turned on, supplying the power supply potential VGH to node B. Subsequently, when clock signal CK1 goes high at time t3, transistor T14 turns off, stopping the supply of power supply potential VGH to node B.

[0132] Next, at time t4, when the clock signal CK2 goes low again, the data signal Code also changes to a low level at this moment, causing the potential at node B to drop to a low level, turning on transistor T11. Furthermore, transistor T15 remains on except during the bootstrap operation described later, causing the potential at node B to drop to a low level, and the potential at node C to also drop to a low level. At this time, the clock signal CK3 supplied to the output enable terminal o_en is high, turning on transistor T16 as well. Consequently, the power supply potential VGH is supplied to the output terminal g-out from both transistors T16 and T17. Furthermore, the potential difference between the output terminal g_out and node C charges capacitor C10.

[0133] When the clock signal CK2 goes high at time t5, transistor T10 is turned off. However, to maintain the clock signal CK1 at a high level, transistor T14 remains off, so the potentials of nodes B and C remain low. As a result, transistor T11 remains on. However, since the clock signal CK2 goes high, the potential of node A, which is connected to the clock terminal CK2 via transistor T11, goes high, and transistors T13 and T17 are turned off.

[0134] Next, when the clock signal CK3 goes low at time t6, the bootstrap operation begins. Specifically, a current path is generated from node C through capacitor C10 and the channel region of transistor T16 toward the output enable terminal o_en, further reducing the potential of node C from low. At this time, the potential of node C decreases to a value approximately equal to VGH-VGL. As a result, even when the clock signal CK3 goes low at time t6, transistor T16 remains in the on state, and the potential of the output terminal g-out, that is, the output signal iCode, remains low. <0> Furthermore, while the potential of the node C is further reduced from the low level, the transistor T15 is turned off, and the node B and the node C are disconnected.

[0135] Afterwards, when the clock signal CK3 becomes high at time t7, the transistor T16 is turned off, the bootstrap operation ends, and the potential of the node C returns to low. In addition, the output signal iCode <0> The potential of node A returns to a high level. Then, at time t8, when the clock signal CK2 goes low, transistor T12 turns on, and the potential of node A returns to a low level. As a result, transistor T17 turns on, and the power supply potential VGH is supplied to the output terminal g-out via transistor T17. At time t8, transistor T10 also turns on. At this time, the data signal Code is high, so the potential of node B also goes high. Furthermore, transistor T15 turns on again, and the potential of node C also goes high.

[0136] As described above, according to the configuration of the register circuit 80 and the buffer circuit 81, even if CMOS is not used at the output stage of the circuit, the output signal iCode can be generated by the bootstrap operation. <0> The output signal of the buffer circuit 81 also does not use CMOS at the output stage, but can output the input signal to the shift circuit 82 to the node D. However, since the clock terminal ck1 is connected to the source of the transistor T21 instead of the output enable terminal o_en, the output signal of the buffer circuit 81 changes to low at the timing when the clock signal CK1 changes to low.

[0137] Figure 14 The internal structure of shift circuit 82 is also shown. As shown in this figure, shift circuit 82 includes transistors T30 to T37 and capacitors C30 and C31. The basic structure of shift circuit 82 is the same as that of register circuit 80, except that transistors T30 to T37 and capacitor C30 replace transistors T10 to T17 and capacitor C20. However, since there are some differences, the following description focuses on those differences from register circuit 80.

[0138] The output signal of buffer circuit 81 (the signal appearing at node D) is supplied to the input terminal of shift circuit 82 (the source of transistor T30). Comparing shift circuit 82 with register circuit 80, clock terminals ck1 and ck2 are swapped in shift circuit 82. Furthermore, clock terminal ck2 is connected to the source of transistor T36 instead of output enable terminal o_en. Capacitor C31 is connected between the gate and source of transistor T22. The junction point between transistors T36 and T37 is connected to output terminal c_out instead of output terminal g_out.

[0139] As a result of the configuration, the shift circuit 82 receives the output signal of the buffer circuit 81 at the rising edge of the clock signal CK1 and outputs the output signal SR_0 to the next stage from the output terminal c_out at the falling edge of the clock signal CK2. <0> Furthermore, the shift circuit 82 also performs a bootstrap operation, and thus the output signal SR_o<0> can be generated even if CMOS is not used in the output stage of the circuit.

[0140] Figure 16 80, buffer circuit 81, and shift circuit 82. The time t10 shown in the figure indicates the time when the data signal Code is transmitted to the shift register SR. <0> ~SR <6> Settings (see Figure 9 ) is completed, the sensor controller 4 does not vibrate the clock signal CK3 in the stage before time t10. This prevents the output signal iCode from being output in the stage of setting the data signal Code. <0> .

[0141] like Figure 16 As shown, the register circuit 80 takes in the data signal Code at time t11 when the clock signal CK2 changes to low, and reflects it to the potential of the node B, that is, the potential of the output signal from the register circuit 80 to the buffer circuit 81. Then, at time t12 when the clock signal CK3 changes to low next time, the output signal iCode is set to <0> At the same time, the buffer circuit 81 also changes the potential of the node D to low. However, the buffer circuit 81 changes the potential of the node D to low because the clock signal CK1, not the clock signal CK3, changes to low.

[0142] The shift circuit 82 takes in the output signal of the buffer circuit 81 (the potential of the node D) at time t12 when the clock signal CK1 changes to low, and then shifts the output signal SR_0 to the same level at time t13 when the clock signal CK2 changes to low. <0> As a result, the next stage shift register S <1> The register circuit 80 and the shift register S <0> The register circuit 80 is delayed by one clock, so that the data signal Code is reflected in the output signal iCode. <1> .

[0143] Figures 17 to 19 It means about Figure 16 The same simulation, analog shift register SR <k>Specifically, Figure 17 Indicates the output signal iCode <0> ~iCode <3> And output signal SR_o <0> ~SR_o <2> The simulation results, Figure 18 Indicates the output signal xiCode <0> ~xiCode <3> And output signal xSR_o <0> ~xSR_o <2> The simulation results, Figure 19 Indicates the output signal iCode on the "+1" side <0> ~iCode <3> And the output signal xiCode on the "-1" side <0> ~xiCode <3> In addition, due to the space constraints of the drawings, the shift register SR provided in the switching circuit 71 is shown in these figures. <k>This is an example of 4 levels (k = 0 to 3), but the same is true for 7 levels.

[0144] Figures 17 to 19 The circled numbers shown indicate the order and timing of the phase setting values supplied from the sensor controller 4 to the switching circuit 71. In this example, eight setting values are supplied in the order of "+1", "+1", "-1", "-1", "+1", "+1", "-1", and "-1".

[0145] according to Figures 17 to 19 As can be seen from the records, the phase setting value appearing in the data signal Code is transmitted to the next stage synchronously with the clock signal CK2. Figure 16 At time t10 shown, the first set value is set to the shift register SR <3> , the second set value is set to the shift register SR <2> , the third set value is set to the shift register SR <1> , the fourth set value is set to the shift register SR <0> Then, at time t14 when the clock signal CK3 changes to low, the bits are output from each shift register SR. <0> ~SR <3> The fourth to first set values are output simultaneously.

[0146] Then, the set value in the data signal Code is transferred to the shift register SR in order in synchronization with the clock signal CK2. <k>At the same time, the shift register SR of each stage is synchronized with the clock signal CK3. <k>Output to selection circuit SE <k>Thus, according to the switching circuit 71 of this embodiment, the setting value supplied by the data signals Code and xCode can be switched from each shift register SR to the corresponding value. <k>Output the specified number of digits at a time.

[0147] return Figure 13 The selection circuit SE<0> is a circuit that switches the connection between the drive lines 90 and 91 and the corresponding routing lines 61, and is composed of transistors T1 to T5 and capacitors C1 and C2. The transistor T1 is connected to the shift register S <0> The gate of transistor T1 is connected to a ground wiring to which a ground potential VGL is supplied. Transistor T2 is connected between drive line 90 and the drain of transistor T5. Capacitor C1 is connected between the drain of transistor T5 and the gate of transistor T2. Transistor T3 is connected to the shift register xS. <0> The output terminal g_out of transistor T4 is connected to the gate of transistor T4. The gate of transistor T3 is connected to a ground wiring supplied with a ground potential VGL. Transistor T4 is connected between drive line 91 and the drain of transistor T5. Capacitor C2 is connected between the drain of transistor T5 and the gate of transistor T4. The source of transistor T5 is connected to a power supply wiring supplied with a power supply potential VGH. The gate of transistor T5 is supplied with a clock signal xCK3, which is an inverted signal of clock signal CK3. The drain of transistor T5 is connected to linear electrode 53 via routing line 61. The select circuit SE is taken out from the drain of transistor T5. <0> The output signal is the transmit signal Tx <0> .

[0148] Figure 20 It means about Figures 16 to 19 The same simulation is performed on various signals related to the selection circuit SE<0>. As shown in the figure, the selection circuit SE <0> With the above structure, when the clock signal xCK3 is at a high level (ie, the transistor T5 is turned off), and the shift register SR <0> Output signal iCode <0> When the clock signal xCK3 is high and the shift register SR is low, the output drive signal Tx_clk is output. <0> Output signal xiCode <0> When it is low, the driving signal xTx_clk is output.

[0149] Figure 21 It means about Figures 16 to 20 The same simulation, simulation from the selection circuit SE <0> ~SE <3> Output transmission signal Tx <0> ~Tx <3> Compare the results of Figure 19 and Figure 21 It can be seen that according to the switching circuit 71 of this embodiment, when the output signal iCode <k>When activated and output signal xiCode <k>When activated, send signal Tx <k>The phases of the transmission signals Tx<k> are opposite. Therefore, it can be said that the phase of the transmission signal Tx<k> can be controlled by the data signals Code and iCode. The switching circuit 71 utilizes this property to generate transmission signals Tx<0> to Tx<6> corresponding to a series of set values supplied by the sensor controller 4 and supplies them to each linear electrode 53.

[0150] return Figure 1 In addition to displaying the image signal, the main processor 3 uses the position and data supplied from the sensor controller 4 to perform other processes, such as moving the cursor displayed on the display surface and generating stroke data representing the trajectory of the electromagnetic induction pen P or finger F within the touch surface. Regarding the stroke data, the main processor 3 also performs processes such as rendering and displaying the generated stroke data, generating and recording digital ink containing the generated stroke data, and transmitting the generated digital ink to an external device in accordance with user instructions.

[0151] As described above, according to the computer 1 of this embodiment, since the switching circuits 70~72 are configured in the display layer 10 within the display area A1, it can cope with the position detection of both the finger F and the electromagnetic induction pen P, does not hinder the narrow frame, and can avoid the increase in the circuit scale of the sensor controller 4.

[0152] In addition, according to the computer 1 of this embodiment, the routing lines 60 to 62 connecting the switching circuits 70 to 72 and the linear electrodes 52 and 53 are extended from the upper side to the lower side of the packaging layer 13 in a manner that is wrapped around the dam 44 that constitutes the edge of the packaging layer 13, so that the switching circuits 70 to 72 can be configured in the display layer 10 within the display area A1.

[0153] Furthermore, according to the computer 1 of this embodiment, since the driving circuits 110 and 111 for each linear electrode 53 arranged in the display layer 10 are all composed of the same channel-type MOSFET, even if the driving circuits 110 and 111 for each linear electrode 53 are arranged in the display layer 10, an increase in the manufacturing cost of the organic EL display 2 can be avoided.

[0154] In addition, according to the computer 1 of this embodiment, the set value of the phase supplied to the driving circuits 110 and 111 in the switching circuits 71 and 72 is expressed by two low-active data signals Code and xCode, and the switching circuits 71 and 72 are configured in a manner capable of performing a bootstrap operation, so that the driving circuits 110 and 111 of each linear electrode 53 can be configured using only the same channel-type MOSFET.

[0155] In addition, in this embodiment, as shown in FIG. Figure 6 As described above, the AC current i is supplied from both the switching circuits 71 and 72 to the linear electrode 53. A 、i B Alternatively, the example of the transmission signal Tx may be provided, but these may be supplied from only one of the switching circuits 71 and 72 to the linear electrode 53 .

[0156] Figure 22 This is a diagram for explaining the content of control performed by the sensor controller 4 in the computer 1 according to a modified example of the present embodiment. Figure 22 (a) shows the content of the control performed by the sensor controller 4 when entering the first mode. Figure 22 (b) shows the content of control performed by the sensor controller 4 when entering the second mode.

[0157] As shown in these figures, the switching circuit 72 of this modification is configured to include, for each linear electrode 53 , a single-pole, single-throw switch provided between the other end of the linear electrode 53 in the x direction and a reference wiring to which a reference potential such as a ground potential is supplied from the sensor controller 4 .

[0158] The sensor controller 4 of this modification uses the control signal shown in the figure to control the switches in the switching circuit 72 in the first mode so as to transmit the alternating current i A 、i B The linear electrode 53 to be supplied is connected to the reference wiring, and the other linear electrodes 53 are disconnected from the reference wiring. On the other hand, in the second mode, the switches in the switching circuit 72 are controlled to disconnect all the linear electrodes 53 from the reference wiring.

[0159] According to this variation, as in the present embodiment, it is possible to appropriately detect the positions of both the finger F and the electromagnetic induction pen P. Therefore, by placing the switches within the switching circuit 72 within the display layer 10 within the display area A1, it is possible to handle the position detection of both the finger F and the electromagnetic induction pen P without hindering the narrowing of the frame and avoiding an increase in the circuit scale of the sensor controller 4.

[0160] In this embodiment, the driving lines 90 to 93 are extended within the display area A1. However, the driving lines 90 to 93 may also be extended within the frame area A2. In this case, the switching circuits 71 and 72 within the display area A1 and the driving lines 90 to 93 can be connected to each other by wiring extending below the dam 44.

[0161] Next, a computer 1 according to a second embodiment of the present invention will be described. The computer 1 according to this embodiment differs from the computer 1 according to the first embodiment in that the linear electrodes 52 and 53 are arranged 90° apart, the switching circuits 70 and 71 are provided in the frame area A2, and the internal structure of the switching circuit 72 is provided. Other aspects are the same as those of the computer 1 according to the first embodiment. Therefore, the differences from the computer 1 according to the first embodiment will be described below.

[0162] Figure 23 : is a top view of the sensor layer 14 of this embodiment. Figure 24 : is a perspective view of the organic EL display 2 of this embodiment. Figure 23 In FIG, a part of the structure included in the circuit layer 11 and the wiring SL are also shown by dotted lines. Figure 24 In FIG, the organic EL layer 12 and the encapsulation layer 13 are shown only in their positions by dotted lines, and the circuit layer 11 is shown only in part of its structure. Figure 23 and Figure 24 Only six linear electrodes 52 and nine linear electrodes 53 are shown in the figure, but actually more linear electrodes 52 and 53 are provided.

[0163] Compare Figure 23 and Figure 24 and Figure 3 and Figure 4 As can be seen, in the organic EL display 2 of this embodiment, the arrangement of the linear electrodes 52 and 53 differs by 90° from that of the organic EL display 2 of the first embodiment. Accordingly, in this embodiment, the switching circuit 72 is provided along the edge of the display area A1 located on the opposite side from the terminal area 16 .

[0164] In addition, the switching circuits 70 and 71 of this embodiment are arranged on the circuit layer 11 within the frame area A2. Therefore, the routing lines 60 and 61 are not formed so as to wrap around the dam 44 forming the edge of the encapsulation layer 13. However, as in the first embodiment, they can also be arranged on the circuit layer 11 within the display area A1. In this case, the routing lines 60 and 61 are formed so as to wrap around the dam 44 forming the edge of the encapsulation layer 13 as in the first embodiment (see FIG. Figure 2 ) in a manner extending from the upper side to the lower side of the encapsulation layer 13.

[0165] On the other hand, the switching circuit 72 of this embodiment is arranged in the circuit layer 11 in the display area A1 as in the first embodiment. Therefore, as in the first embodiment, the routing line 62 is wound around the dam 44 (see FIG. 4 ) forming the edge of the encapsulation layer 13. Figure 2 ) is extended from the upper side to the lower side of the packaging layer 13. However, the switching circuit 72 of this embodiment does not have a function of conducting an alternating current i A 、i B The drive circuits 110 and 111 for generating and supplying the transmission signals Tx<0> to Tx<6> are composed of only a collection of switches. Figure 25 Provide detailed explanation.

[0166] Figure 25 This is a diagram explaining the content of control performed by the sensor controller 4 in the computer 1 according to the present embodiment. Figure 25 (a) shows the content of the control performed by the sensor controller 4 when entering the first mode. Figure 25 (b) shows the contents of the control performed by the sensor controller 4 when entering the second mode. Figure 25 In the figure, the linear electrode 53 and the switching circuit 70 are omitted, but these structures are similar to those in the figure except that the linear electrode 53 extends in the x direction. Figure 6 The structures shown are the same.

[0167] like Figure 25 As shown in (a) and (b) of FIG. 1 , the switching circuit 72 of this embodiment is configured to include a plurality of single-pole, single-throw switches arranged to connect the other ends of two adjacent linear electrodes 53 in the y direction. Furthermore, the sensor controller 4 uses the control signal shown in the figure to control each switch in the switching circuit 72 in the first mode to connect all two adjacent linear electrodes 53 to each other. On the other hand, in the second mode, it controls each switch in the switching circuit 72 to disconnect all two adjacent linear electrodes 53. The state of the other end of each linear electrode 53 in the second mode is the same as Figure 22 On the other hand, the state of the other end of each linear electrode 53 in the first mode is the same as that shown in (b). Figure 22 The state shown in (a) is different, but even if Figure 25 Even if the linear electrodes 53 are connected as in (a), the position detection of the electromagnetic induction pen P can be appropriately performed.

[0168] According to the computer 1 of this embodiment, since the switching circuit 72 is arranged in the display layer 10 within the display area A1, it is possible to handle the position detection of both the finger F and the electromagnetic induction pen P without hindering the narrowing of the frame, and it is possible to avoid an increase in the circuit scale of the sensor controller 4. Note that, as described above, the switching circuits 70 and 71 can also be arranged in the display layer 10 within the display area A1, and thus the above effect can be further enhanced.

[0169] Next, a computer 1 according to a third embodiment of the present invention will be described. This embodiment differs from the computer 1 according to the second embodiment in that the linear electrodes 52 and 53 are formed of a mesh conductor and that switching circuits 73 to 75 are also included. Otherwise, the computer 1 according to the second embodiment is identical to the computer 1 according to the second embodiment. Therefore, the following description will focus on the differences from the computer 1 according to the second embodiment.

[0170] Figure 26 : is a top view of the sensor layer 14 of this embodiment. Figure 27 : is a perspective view of the organic EL display 2 of this embodiment. Figure 26 In FIG, a part of the structure included in the circuit layer 11 and the wiring SL are also shown by dotted lines. Figure 27 In FIG, the organic EL layer 12 and the encapsulation layer 13 are shown only in their positions by dotted lines, and the circuit layer 11 is shown only in part of its structure. Figure 26 and Figure 27 Only 12 linear electrodes 52 and 8 linear electrodes 53 are shown in the figure, but actually more linear electrodes 52 and 53 are provided.

[0171] like Figure 26 As shown, the multiple linear electrodes 52 and 53 of this embodiment are composed of a mesh conductor formed by connecting thin lines arranged in a rhombus shape. Although not shown, each rhombus portion of the linear electrode 52 is connected to other adjacent rhombus portions in the y-direction, and each rhombus portion of the linear electrode 53 is connected to other adjacent rhombus portions in the x-direction. Furthermore, the linear electrodes 52 and 53 of this embodiment can also be composed of solid conductors similar to those of the first and second embodiments. Conversely, the linear electrodes 52 and 53 of the first and second embodiments can also be composed of the same mesh conductor as the linear electrodes 52 and 53 of this embodiment.

[0172] Switching circuits 73 through 75, like switching circuits 70 through 72, are circuits used by sensor controller 4 to switch between a first mode using linear electrodes 52 and 53 for induced current detection and a second mode using linear electrodes 52 and 53 for capacitance detection. In this embodiment, switching circuits 70, 71, and 73 are located on circuit layer 11 within frame area A2. Switching circuits 72, 74, and 75 are located on circuit layer 11 within display area A1. However, all switching circuits 70 through 75 may also be located on circuit layer 11 within display area A1.

[0173] One end in the x-direction of each linear electrode 52 is alternately connected to the switching circuit 70 and the switching circuit 74. Furthermore, the other end in the x-direction of each linear electrode 52 is alternately connected to the switching circuit 73 and the switching circuit 75. More specifically, a linear electrode 52 having one end in the x-direction connected to the switching circuit 70 is connected to the switching circuit 75 at its other end in the x-direction, while a linear electrode 52 having one end in the x-direction connected to the switching circuit 74 is connected to the switching circuit 73 at its other end in the x-direction. This alternating connection structure is employed to ensure that the widths of the frame area A2 on both sides of the x-direction are uniform.

[0174] Each linear electrode 52 is connected to the switching circuit 70 via a routing line 60, and each linear electrode 52 is connected to the switching circuit 74 via a routing line 64. Furthermore, each linear electrode 52 is connected to the switching circuit 73 via a routing line 63, and each linear electrode 52 is connected to the switching circuit 75 via a routing line 65. The switching circuits 74 and 75 are arranged on the circuit layer 11 within the display area A1, so the routing lines 64 and 65 are wound around the dam 44 (see FIG. 1 ) that constitutes the edge of the encapsulation layer 13. Figure 2 ) in a manner extending from the upper side to the lower side of the encapsulation layer 13.

[0175] The switching circuit 73 is a circuit that is partially cut out of the switching circuit 70 and is configured to perform the same processing as the switching circuit 70. Specifically, the switching circuit 73 incorporates a receiving circuit and a selection circuit similar to those of the switching circuit 70. Based on control from the sensor controller 4, the switching circuit 73 extracts the reception signal Rx from each linear electrode 52 while switching the receiving circuit to be used and the connection destination of each linear electrode 52 in a time-division manner.

[0176] Figure 28 72, 74, and 75. Figure 25 It can be seen that the switching circuit 72 has the same structure as the switching circuit 72 in the second embodiment.

[0177] The switching circuit 74 is configured to include a plurality of single-pole, single-throw (SPST) switches, each configured to connect one end in the x-direction of two adjacent linear electrodes 52 among the plurality of connected linear electrodes 52. Similarly, the switching circuit 75 is configured to include a plurality of SPST switches, each configured to connect the other ends in the x-direction of two adjacent linear electrodes 52 among the plurality of connected linear electrodes 52. Both the switching circuits 74 and 75 are configured to control the on / off states of each switch using a different control signal.

[0178] Figure 29 and Figure 30 This is a diagram explaining the content of control performed by the sensor controller 4 in the computer 1 according to the present embodiment. Figure 29 Indicates the content of the control performed by the sensor controller 4 when entering the second mode, Figure 30 (a) and (b) show the contents of the control performed by the sensor controller 4 when entering the first mode. Figure 29 as well as Figure 30 In FIG. 5 , the linear electrodes 52 and 53 are depicted as simple rectangles for easy understanding, but the actual linear electrodes 52 and 53 are mesh conductors as described above.

[0179] First, refer to Figure 29 The sensor controller 4 that enters the second mode first controls the switching circuits 72, 74, and 75 to Figure 28 All the switches shown are turned off. As a result, the ends of the linear electrodes 53 not connected to the switching circuit 71 and the ends of the linear electrodes 52 not connected to the switching circuits 70 and 73 all become open ends.

[0180] Next, the sensor controller 4 controls the switching circuit 71 to select the seven adjacent linear electrodes 53, and controls the switching circuits 70 and 73 to connect the end of each linear electrode 52 to the operational amplifier 70b (see Figure 6 ) connection. Switching circuit 71, receiving this control, selects the indicated seven linear electrodes 53 and supplies transmission signals Tx<0> to Tx<6>. While switching circuit 71 supplies transmission signals Tx<0> to Tx<6> to each linear electrode 53, sensor controller 4 obtains the signal output from switching circuits 70 and 73 to each linear electrode 52 as a reception signal Rx at each linear electrode 52. By applying equation (4) described above, the capacitance at each intersection between each linear electrode 52 and each of the seven selected linear electrodes 53 is derived.

[0181] The sensor controller 4 repeatedly performs the above process, changing the linear electrodes 53 selected by the switching circuit 71, until all linear electrodes 53 are selected. When this iterative process is complete, the sensor controller 4 obtains the electrostatic capacitance at each intersection between the linear electrodes 52 and 53. The sensor controller 4 derives the distribution of the thus-obtained electrostatic capacitance within the panel surface and, based on the obtained distribution, derives the position of the finger F.

[0182] Next, refer to Figure 30 The sensor controller 4 that enters the first mode first controls the switching circuits 72, 74, and 75, thereby forming Figure 30 Specifically, switching circuit 72 is controlled to connect all two adjacent linear electrodes 52, and switching circuits 74 and 75 are controlled to connect each linear electrode 52 to each other. After switching circuits 74 and 75 are controlled, the two connected linear electrodes 52 form a loop coil.

[0183] Next, the sensor controller 4 controls the switching circuit 71 so as to select one linear electrode 53 and connect both ends of each loop coil to the differential amplifier 70a (see Figure 6 ) is connected in a manner that controls the switching circuits 70 and 73. The switching circuit 71 that receives the control selects the instructed linear electrode 53 and supplies an AC current i to the two linear electrodes 53 adjacent to it on one side. A , supplying an AC current i to the two adjacent linear electrodes 53 on the other side. B The sensor controller 4 obtains the AC current i A 、i B The signal output from the switching circuits 70 and 73 for each loop coil immediately after the supply of is completed is used as the reception signal Rx in each loop coil.

[0184] Next, the sensor controller 4 controls the switching circuits 74 and 75 to establish Figure 30 Specifically, the switching circuits 74 and 75 are controlled in such a way as to change the linear electrodes 52 connected to each other. Figure 30 The loop coil is formed at a position shifted one level compared to the position in (a). Thereafter, the sensor controller 4 performs the same processing as described above to obtain the reception signal Rx in each loop coil.

[0185] The sensor controller 4 repeats the above process while changing the linear electrodes 53 selected by the switching circuit 71 until all linear electrodes 53 except the two linear electrodes 53 at each end in the x-direction are selected. When this iterative process is complete, the sensor controller 4 obtains the received signal Rx from each loop coil for each linear electrode 53. The sensor controller 4 derives the distribution of the signal strengths of the multiple received signals Rx obtained within the panel surface and, based on this distribution, derives the position of the electromagnetic induction pen P.

[0186] According to the computer 1 of this embodiment, since switching circuits 72, 74, and 75 are arranged in the display layer 10 within the display area A1, it is possible to detect the position of both the finger F and the electromagnetic induction pen P without hindering the narrowing of the frame and avoiding an increase in the circuit scale of the sensor controller 4. Furthermore, as described above, switching circuits 70, 71, and 73 can also be arranged in the display layer 10 within the display area A1, thereby further enhancing the aforementioned effects.

[0187] Next, a computer 1 according to a fourth embodiment of the present invention will be described. This embodiment differs from the computer 1 according to the third embodiment in that the linear electrodes 52 and 53 are arranged 90 degrees apart, that switching circuits 74 and 75 are connected to linear electrode 53 instead of linear electrode 52, and that the internal structures of switching circuits 72 and 75 are identical. In all other respects, the computer 1 according to the third embodiment is identical, so the following description will focus on the differences from the computer 1 according to the third embodiment.

[0188] Figure 31 This diagram shows the structure of the organic EL display 2 and the internal structure of the switching circuits 73-75 in this embodiment. In this embodiment, the switching circuits 70-72 are arranged on the circuit layer 11 within the frame area A2. Meanwhile, the switching circuits 73-75 are arranged on the circuit layer 11 within the display area A1. However, all of the switching circuits 70-75 may also be arranged on the circuit layer 11 within the display area A1.

[0189] like Figure 31 As shown, in this embodiment, one end in the x-direction of each linear electrode 53 is alternately connected to a switching circuit 71 and a switching circuit 74. Furthermore, the other end in the x-direction of each linear electrode 53 is alternately connected to a switching circuit 72 and a switching circuit 75. More specifically, a linear electrode 52 having one end in the x-direction connected to the switching circuit 71 is connected to the switching circuit 75 at its other end in the x-direction, while a linear electrode 52 having one end in the x-direction connected to the switching circuit 74 is connected to the switching circuit 72 at its other end in the x-direction. This alternating connection structure is employed to ensure that the widths of the frame areas A2 on both sides in the x-direction are uniform, similar to the third embodiment.

[0190] Each linear electrode 53 is connected to the switching circuit 71 via a routing line 61, and each linear electrode 53 is connected to the switching circuit 74 via a routing line 64. Furthermore, each linear electrode 53 is connected to the switching circuit 72 via a routing line 62, and each linear electrode 53 is connected to the switching circuit 75 via a routing line 65. The switching circuits 74 and 75 are arranged on the circuit layer 11 within the display area A1, so the routing lines 64 and 65 are wound around the dam 44 (see FIG. 1 ) that constitutes the edge of the encapsulation layer 13. Figure 2 ) in a manner extending from the upper side to the lower side of the encapsulation layer 13.

[0191] One end of each linear electrode 52 in the y direction is connected to the switching circuit 70, and the other end in the y direction is connected to the switching circuit 73. Each linear electrode 52 is connected to the switching circuit 70 via a routing line 60, and each linear electrode 52 is connected to the switching circuit 73 via a routing line 63. The switching circuit 73 is arranged in the circuit layer 11 within the display area A1, so the routing line 63 is wound around the dam 44 (see FIG. 1 ) that constitutes the edge of the encapsulation layer 13. Figure 2 ) in a manner extending from the upper side to the lower side of the encapsulation layer 13.

[0192] The switching circuit 72 of this embodiment is a part of the switching circuit 71 cut out, and is configured to be able to perform the same processing as the switching circuit 71. That is, the switching circuit 72 of this embodiment has the same driving circuits 110 and 111 and selection circuit 112 as the switching circuit 71 (see Figure 5 ), according to the control from the sensor controller 4, the current or voltage is applied to each linear electrode 53 while switching the driving circuit used and the connection destination of each linear electrode 53 in a time-sharing manner.

[0193] Unlike the switching circuit 73 of the third embodiment, the switching circuit 73 of this embodiment lacks a receiving circuit or a selecting circuit and is composed solely of a collection of switches. Specifically, the switching circuit 73 includes a plurality of single-pole, single-throw switches arranged to connect the other ends of two adjacent linear electrodes 53 in the y direction. Furthermore, the switching circuit 73 is configured to control the on / off state of each switch using a different control signal.

[0194] The switching circuit 74 of this embodiment is configured to include a plurality of single-pole, single-throw (SPST) switches configured to connect one end in the x-direction of two adjacent linear electrodes 53 among the plurality of connected linear electrodes 53. Similarly, the switching circuit 75 is configured to include a plurality of single-pole, single-throw (SPST) switches configured to connect the other ends in the x-direction of two adjacent linear electrodes 53 among the plurality of connected linear electrodes 53. Both the switching circuits 74 and 75 are configured to simultaneously control the on / off states of all switches using a single control signal.

[0195] Figures 32 to 34 This is a diagram explaining the content of control performed by the sensor controller 4 in the computer 1 according to the present embodiment. Figure 32 Indicates the content of the control performed by the sensor controller 4 when entering the second mode, Figure 33 (a) (b) and Figure 34 (a) and (b) show the contents of the control performed by the sensor controller 4 when entering the first mode. Figures 32 to 34 In FIG. 5 , the linear electrodes 52 and 53 are depicted as simple rectangles for easy understanding, but the actual linear electrodes 52 and 53 are mesh conductors as described above.

[0196] First, refer to Figure 32 The sensor controller 4 that enters the second mode first controls the switching circuits 73 to 75 to make Figure 31 All the switches shown are turned off. As a result, the ends of the linear electrode 53 that are not connected to the switching circuits 71 and 72 and the end of the linear electrode 52 that is not connected to the switching circuit 70 all become open ends.

[0197] Next, the sensor controller 4 controls the switching circuits 71 and 72 to select seven adjacent linear electrodes 53, and controls the switching circuit 70 to connect the end of each linear electrode 52 to the operational amplifier 70b (see Figure 6 ) connection. The switching circuits 71 and 72, receiving this control, select the indicated seven linear electrodes 53 and supply transmission signals Tx<0> to Tx<6>. Furthermore, in this embodiment, since each linear electrode 52 is alternately connected to the switching circuits 71 and 72, the transmission signals Tx<0> to Tx<6> are also alternately output from the switching circuits 71 and 72. While the switching circuits 71 and 72 are supplying the transmission signals Tx<0> to Tx<6> to each linear electrode 53, the sensor controller 4 obtains the signal output from the switching circuit 70 to each linear electrode 52 as the received signal Rx at each linear electrode 52, and derives the electrostatic capacitance of each intersection between each linear electrode 52 and each of the selected seven linear electrodes 53 by applying the aforementioned equation (4).

[0198] The sensor controller 4 repeatedly performs the above process, changing the linear electrodes 53 selected by the switching circuits 71 and 72, until all linear electrodes 53 have been selected. When this iterative process is complete, the sensor controller 4 obtains the electrostatic capacitance at each intersection of the linear electrodes 52 and 53. The sensor controller 4 derives the distribution of the thus-obtained electrostatic capacitance within the panel surface and, based on the obtained distribution, derives the position of the finger F.

[0199] Next, refer to Figure 33 and Figure 34 In the first mode, the sensor controller 4 first controls the switching circuits 73 to 75, thereby forming Figure 33 Specifically, switching circuit 73 is controlled to connect linear electrodes 53 to each other, and switching circuits 74 and 75 are controlled to connect all linear electrodes 52. After switching circuit 73 is controlled, the two connected linear electrodes 52 form a loop coil.

[0200] Next, the sensor controller 4 controls the switching circuit 71 to select one linear electrode 53 that is not connected to itself, and controls the switching circuit 70 to connect both ends of each loop coil to the differential amplifier 70a (see Figure 6 ) is connected. The switching circuit 71 that receives the control selects the indicated linear electrode 53 and supplies an AC current i to the linear electrode 53 adjacent to the linear electrode 53 on one side. A , supplies an AC current i to the adjacent linear electrode 53 on the other side. B The sensor controller 4 obtains the AC current i A 、i B The signal output from the switching circuit 70 for each loop coil immediately after the supply of is completed is used as the reception signal Rx in each loop coil.

[0201] Next, the sensor controller 4 controls the switching circuit 73 to form Figure 33 Specifically, the switching circuit 73 is controlled in such a way as to change the interconnected linear electrodes 52. Figure 33 The loop coil is formed at a position shifted one level compared to the position in (a). Thereafter, the sensor controller 4 performs the same processing as described above to obtain the reception signal Rx in each loop coil.

[0202] Next, the sensor controller 4 controls the switching circuit 73 to form Figure 34 Thus, the switching circuit 73 becomes Figure 33 The same state as (a). Next, the sensor controller 4 controls the switching circuit 72 to select one linear electrode 53 that is not connected to itself. The switching circuit 72, which receives the control of the sensor controller 4, selects the indicated linear electrode 53 and supplies an AC current i to the linear electrode 53 adjacent to it. A , supplying an alternating current i to the linear electrode 53 adjacent to the other side. B The sensor controller 4 obtains the AC current i A 、i B The signal output from the switching circuit 70 for each loop coil immediately after the supply of is completed is used as the reception signal Rx in each loop coil.

[0203] Next, the sensor controller 4 controls the switching circuit 73 to form Figure 34 Specifically, the switching circuit 73 is controlled in such a manner as to change the linear electrodes 52 connected to each other. As a result, the switching circuit 73 becomes Figure 33 The sensor controller 4 then performs the same processing as described above to obtain the reception signal Rx from each loop coil.

[0204] The sensor controller 4 repeats the above process, changing the linear electrodes 53 selected by the switching circuit 71 or the switching circuit 72, until all linear electrodes 53 except for the one linear electrode 53 at each end in the y direction are selected. When this iterative process is completed, the sensor controller 4 obtains the received signal Rx from each loop coil for each linear electrode 53. The sensor controller 4 derives the distribution of the signal strengths of the multiple received signals Rx obtained within the panel surface and, based on this distribution, derives the position of the electromagnetic induction pen P.

[0205] According to the computer 1 of this embodiment, since switching circuits 73-75 are arranged in the display layer 10 within the display area A1, it can handle position detection for both the finger F and the electromagnetic induction pen P, without hindering the narrowing of the frame, and it can also avoid increasing the circuit scale of the sensor controller 4. Furthermore, as described above, switching circuits 70-72 can also be arranged in the display layer 10 within the display area A1, thereby further enhancing the aforementioned effect.

[0206] Figure 35 and Figure 36 1 is a diagram illustrating the control contents of the sensor controller 4 when the computer 1 enters the first mode in a modified example of the present embodiment. The sensor controller 4 of this modified example differs from the sensor controller 4 of the present embodiment in that the switching circuits 71 and 72 are controlled so as to simultaneously supply the AC current i to the four linear electrodes 53. A 、i B Specifically, the sensor controller 4 of this modification controls the switching circuits 71 and 72 to supply the alternating current i to the two linear electrodes 53 adjacent to one side of the selected linear electrode 53. A , supplying an alternating current i to the two linear electrodes 53 adjacent to the other side. B As a result, the alternating magnetic field cannot be sent from the two linear electrodes 53 at both ends in the y direction, but an alternating magnetic field with a stronger intensity can be sent from each linear electrode 53 .

[0207] Next, a computer 1 according to a fifth embodiment of the present invention will be described. This embodiment differs from the computer 1 according to the second embodiment in that it further includes a plurality of linear electrodes 54, a switching circuit 76, the switching circuit 72 is disposed within the frame area A2, and the linear electrodes 52 do not form a loop coil. In other respects, this embodiment is identical to the computer 1 according to the second embodiment. Therefore, the following description will focus on the differences from the computer 1 according to the second embodiment.

[0208] Figure 37 : is a top view of the sensor layer 14 of this embodiment. Figure 38 : is a perspective view of the organic EL display 2 of this embodiment. Figure 37 In FIG, a part of the structure included in the circuit layer 11 and the wiring SL are also shown by dotted lines. Figure 38 In FIG, the organic EL layer 12 and the encapsulation layer 13 are shown only in their positions by dotted lines, and the circuit layer 11 is shown only in part of its structure. Figure 37 as well as Figure 38 Only ten linear electrodes 52 , eight linear electrodes 53 , and six linear electrodes 54 are shown in the figure, but actually, more linear electrodes 52 - 54 are provided.

[0209] like Figure 37 and Figure 38 As shown, the organic EL display 2 of this embodiment includes a plurality of linear electrodes 54 in addition to the plurality of linear electrodes 52 and 53. Each linear electrode 54 is composed of a linear solid conductor extending in the y direction as a whole while meandering, and is connected to the anode electrode 31 of the light emitting element 30 (see FIG. Figure 2 ) the same process, formed in Figure 2 The upper surface of the planarized insulating film 24 is shown.

[0210] Figure 39 This figure shows the top surface of the planarization insulating film 24 of the organic EL display 2 according to this embodiment. As shown in this figure, anode electrodes 31 are arranged in a matrix on the top surface of the planarization insulating film 24. The linear electrodes 54 are zigzag-shaped as described above to avoid the anode electrodes 31 arranged in the matrix.

[0211] return Figure 37 and Figure 38 One end of each linear electrode 54 (the end on the terminal region 16 side) is connected to the switching circuit 76 via the routing line 66, and the other ends are connected to each other. In this embodiment, the switching circuit 76 is responsible for generating the AC current i A 、i B The switching circuit 76 supplies an alternating current i to each linear electrode 54. A 、i B As a result, an alternating magnetic field for detecting the position of the electromagnetic induction pen P is sent out from each linear electrode 54. No alternating current i is supplied to the plurality of linear electrodes 53. A 、i B The switching circuit 70 supplies only the transmission signals Tx<0> to Tx<6> for detecting the position of the finger F to each linear electrode 53. The switching circuit 72 may be composed of only a collection of switches, similar to the switching circuit 72 of the second embodiment, or may supply the same transmission signals Tx<0> to Tx<6> as the switching circuit 71 to each linear electrode 53, similar to the switching circuit 72 of the first embodiment.

[0212] According to the computer 1 of this embodiment, the sensor controller 4 can also detect the positions of the electromagnetic induction pen P and the finger F, similar to the first to fourth embodiments, and obtain data transmitted by the electromagnetic induction pen P. Furthermore, according to the computer 1 of this embodiment, the linear electrode 54 that functions to emit an alternating magnetic field for detecting the position of the electromagnetic induction pen P can be formed within the display layer 10 rather than the sensor layer 14.

[0213] While preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments and can, of course, be implemented in various forms without departing from the spirit and scope of the present invention.

[0214] [Explanation of Reference Numerals]

[0215] 1 Computer

[0216] 2 Organic EL displays

[0217] 3 Main processor

[0218] 4 Sensor Controller

[0219] 10 Display Layer

[0220] 11 Circuit layer

[0221] 12 Organic EL layer

[0222] 13 Encapsulation layer

[0223] 14 Sensor Layer

[0224] 16 terminal area

[0225] 16a pad electrode

[0226] 20 substrate

[0227] 21 Buffer layer

[0228] 22 Gate insulating film

[0229] 23 interlayer insulating film

[0230] 24 Planarization insulating film

[0231] 25 Dike layer

[0232] 30 light-emitting elements

[0233] 31 Anode electrode

[0234] 32 Luminescent Layer

[0235] 33 cathode electrode

[0236] 35 pixel driving circuit

[0237] 36 semiconductor layer

[0238] 37 Gate electrode

[0239] 38 drain electrode

[0240] 39 source electrode

[0241] 41, 43 Inorganic layer

[0242] 42 organic layer

[0243] 44 Dam

[0244] 50, 51 Insulation film

[0245] 52~54 linear electrodes

[0246] 55 Bridge conductor

[0247] 56 protective film

[0248] 60~66 routing lines

[0249] 70~76 Switching Circuit

[0250] 70a differential amplifier

[0251] 70b operational amplifier

[0252] 80 register circuit

[0253] 81 Buffer Circuit

[0254] 82 shift circuit

[0255] 90~93 drive line

[0256] 100, 101 receiving circuit

[0257] 102, 112 selection circuit

[0258] 110, 111 drive circuit

[0259] A1 display area

[0260] A2 border area

[0261] P Electromagnetic Induction Pen

[0262] SR <k> 、S <k>、xS <k>shift register

[0263] SE <k>Selecting the circuit

[0264] VH1~VH3 through holes.< / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k> < / k>

Claims

1. A display comprising: The display layer includes a light-emitting element group arranged in the display area and a pixel driving circuit for controlling the lighting / extinguishing of the light-emitting element group; an encapsulation layer, encapsulating the display layer; a linear electrode group, disposed on the upper side of the packaging layer; as well as A routing circuit, one end of which is connected to the linear electrode group, A switching circuit is provided in the display layer within the display area. The switching circuit is connected to the other end of the routing line and is configured to switch between a first mode in which the linear electrode group is used for induced current detection and a second mode in which the linear electrode group is used for electrostatic capacitance detection.

2. The display according to claim 1, further comprising a first driving line supplied with a first driving signal from the sensor controller, The switching circuit includes a selection circuit that switches the connection between the first driving line and the routing line.

3. The display according to claim 2, further comprising a second drive line to which a second drive signal having an inverted phase with the first drive signal is supplied from the sensor controller, The selection circuit connects one of the first driving line and the second driving line to the routing line.

4. The display according to claim 3, The linear electrode group includes a plurality of linear electrodes extending along a first direction. The routing line is extended along the first direction, The first driving line and the second driving line are respectively extended in a second direction intersecting the first direction.

5. The display according to claim 3, The first driving line and the second driving line are respectively extended in the same layer as the data line that supplies driving current to the light emitting element group.

6. The display according to claim 3, The first driving line and the second driving line are respectively extended in the display area.

7. The display according to claim 3, The first driving line and the second driving line are respectively extended outside the display area.

8. The display according to claim 1, The routing line is provided to extend from the upper side to the lower side of the encapsulation layer so as to wrap around a dam constituting an edge portion of the encapsulation layer.

9. The display according to claim 2, The first driving signal is an AC signal.

10. The display according to claim 2, The first drive signal is a signal generated by turning on and off a switch.

11. The display according to claim 1, It also includes a reference line extending from the other end of the linear electrode group, The switching circuit includes a circuit that switches the connection between the reference line and the linear electrode group.

12. The display according to claim 1, The linear electrode group includes a plurality of first linear electrodes supplied with an alternating current or a voltage signal. The switching circuit connects one ends of the plurality of first line electrodes to each other when the AC current is supplied to the plurality of first line electrodes, and disconnects one ends of the plurality of first line electrodes when the voltage signal is supplied to the plurality of first line electrodes.

13. The display according to claim 12, It also includes a terminal area for connecting the linear electrode group to a sensor controller, The switching circuit is provided along an edge of the display region located on the opposite side from the terminal region when viewed from the terminal region.

14. The display according to claim 1, The linear electrode group includes a plurality of first linear electrodes extending along a first direction. The switching circuit includes a first switching circuit disposed on one end side of the plurality of first linear electrodes and a second switching circuit disposed on the other end side of the plurality of first linear electrodes. The system further includes a third switching circuit disposed on one end side of the plurality of first linear electrodes and a fourth switching circuit disposed on the other end side of the plurality of first linear electrodes. One ends of the plurality of first linear electrodes are alternately connected to the first switching circuit and the third switching circuit. The other ends of the plurality of first linear electrodes are alternately connected to the second switching circuit and the fourth switching circuit.

15. The display according to claim 14, The first switching circuit includes a plurality of single-pole single-throw switches, and the plurality of single-pole single-throw switches are configured to connect one end of two adjacent first linear electrodes among the plurality of connected first linear electrodes. The second switching circuit includes a plurality of single-pole single-throw switches, and the plurality of single-pole single-throw switches are provided to connect the other ends of two adjacent first linear electrodes among the plurality of connected first linear electrodes.

16. The display according to claim 14 or 15, The third switching circuit and the fourth switching circuit are circuits for extracting induced current or voltage signals from the plurality of first linear electrodes.

17. The display according to claim 14 or 15, The third switching circuit and the fourth switching circuit are circuits for generating an alternating current or a voltage signal and supplying the signal to the plurality of first linear electrodes.

18. The display according to claim 1, The switching circuit includes a driving circuit that generates an AC current or voltage signal according to a phase setting value supplied from a sensor controller and supplies the AC current or voltage signal to the linear electrode group. The sensor controller supplies the set value of the phase to the drive circuit by supplying a first data signal activated when the set value of the phase is 0° and a second data signal activated when the set value of the phase is 180° to the drive circuit.

19. The display according to claim 18, The drive circuit is configured to be capable of performing a bootstrap operation for lowering the gate potential of the low-side P-channel MOSFET of the output stage to a low level.

20. A display comprising: The display layer includes a light-emitting element group arranged in the display area and a pixel driving circuit for controlling the lighting / extinguishing of the light-emitting element group; a linear electrode group arranged to overlap with the display layer; and The driving circuit of the linear electrode group is arranged in the display layer. The one or more MOSFETs constituting the driving circuit all have the same channel type.

21. The display according to claim 20, The driving circuit generates an AC current or voltage signal according to a phase setting value supplied from the sensor controller and supplies the AC current or voltage signal to the linear electrode group. The sensor controller supplies the set value of the phase to the drive circuit by supplying a first data signal activated when the set value of the phase is 0° and a second data signal activated when the set value of the phase is 180° to the drive circuit.

22. The display according to claim 20, The drive circuit is configured to be capable of performing a bootstrap operation for lowering the gate potential of the low-side P-channel MOSFET of the output stage to a low level.

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