Input device with display screen

Abstract

Provided is a display screen-equipped input device with which it is possible to suppress the display screen from reaching a high temperature.　This display screen-equipped input device includes: a display device unit having a display screen; and a position detection sensor disposed on the rear surface side of the display screen while overlapping the display screen, wherein an indicated input position from a position indicator is detected by using the position detection sensor. A heat conduction member having higher thermal conductivity than the thermal conductivity of the display device unit is disposed on the rear surface side of the display screen, and the heat generated by the display device unit is dissipated at the rear surface side of the display screen via the heat conduction member.

Description

[Technical field]

[0001] The present invention relates to an input device with a display screen that has at least one of a touch detection function for detecting a position touched by a finger and a pen indication detection function for detecting a position indicated by an electronic pen. [Background technology]

[0002] There is known an input device with a display screen that combines a display device unit having a display screen with a coordinate input means using a position detection sensor (see, for example, Patent Document 1 (Patent Publication No. 5808001)). As the display device unit, for example, a flat display made of a liquid crystal display is used. And, as the position detection sensor, for example, an electromagnetic induction type position detection sensor is used in order to input coordinates with high precision.

[0003] As shown in FIG. 11, in this type of input device 100 with a display screen, an electromagnetic induction type position detection sensor 100S is arranged on the back side of the display screen 100D so as to be superimposed on the display screen 100D, and the entire area of ​​the display screen 100D is configured as the position detection area of ​​the position detection sensor 100S.

[0004] As shown in FIG. 11, the user holds electronic pen 101, which is electromagnetically inductively coupled to position detection sensor 100S, in his / her hand and inputs coordinates on display screen 100D. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 5808001 Summary of the Invention [Problem to be solved by the invention]

[0006] Recently, display devices have become larger in size and high-resolution liquid crystal displays, such as 4K and 8K, have appeared. It is being considered to use such high-resolution liquid crystal displays in the above-mentioned input devices with display screens.

[0007] In this case, in the case of this type of high-resolution liquid crystal display, the aperture ratio of the liquid crystal is low, so in order to ensure the brightness of the display screen, high-brightness LEDs (Light Emitting Diodes) are used as the backlight, which generates a lot of heat. In addition, this type of input device also requires support for new display technologies such as HDR (High Dynamic Range) to prevent crushed blacks and crushed whites, which also causes a lot of heat generation from the backlight. As a result, the heat generated by the display backlight increases, and there is a risk that the display screen will become hotter than human body temperature.

[0008] If the user only views the image displayed on the display screen, the high temperature of the display screen as described above will not have any adverse effect on the user. However, in the case of an input device with a display screen configured as described above, the user holds the electronic pen 101 in his / her hand and inputs coordinates on the display screen 100D as shown in FIG. 11. In this case, the user generally touches a part of the palm of his / her hand to the display screen. Therefore, if the display screen becomes hotter than the human body, the user may feel the heat of the display screen 100D and may feel a strange or uncomfortable sensation.

[0009] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide an input device with a display screen that can solve the above problems. [Means for solving the problem]

[0010] In order to solve the above problems, An input device with a display screen, comprising: a display device section having a display screen; and a position detection sensor disposed on a rear side of the display screen in a state where the position detection sensor is superimposed on the display screen, the input device detecting an input position indicated by a position indicator using the position detection sensor, the position detection sensor is configured to have a thermal conductivity higher than that of the display device unit, and is attached to the back side of the display screen of the display device unit via a first thermal conductive layer having a thermal conductivity higher than that of the display device unit; a second thermally conductive layer having a thermal conductivity higher than that of the display device unit is provided on a side of the position detection sensor opposite to a side where the position detection sensor is attached to the display device unit; a heat dissipation member having a thermal conductivity higher than that of the display unit exposed to the outside is attached via the second thermal conduction layer, the heat dissipation member exposed to the outside includes a stand for supporting the display screen, and the stand is provided with a slit for increasing an area of ​​an outer surface of the heat dissipation member; before Heat generated in the display unit , before The display screen is designed to dissipate heat on the rear side. 1. An input device with a display screen.

[0011] In the display device with a display screen having the above-mentioned configuration, the thermal conductivity of the display unit is higher than that of the display unit. A position detection sensor having a higher thermal conductivity than that of the display device unit is attached to the back side of the display screen of the display device unit via a first thermal conductive layer. A second thermal conductive layer having a higher thermal conductivity than that of the display device unit is provided on the side of the position detection sensor opposite to the side attached to the display device unit, and a heat dissipation member having a higher thermal conductivity than that of the display device unit exposed to the outside is further attached via this second thermal conductive layer. The heat dissipation member includes a stand for supporting the display screen, and the stand is provided with slits for increasing the area of ​​the outer surface of the heat dissipation member. This configuration By Table Heat generated in the display unit Table Heat is dissipated on the back side of the display screen. So, The display screen is prevented from becoming hotter than the user's body. [Brief description of the drawings]

[0012] [Figure 1] 1 is a side view of the appearance of an embodiment of an input device with a display screen according to the present invention; [Diagram 2] 1 is a front view of the appearance of an embodiment of an input device with a display screen according to the present invention; [Diagram 3] 1 is a diagram for explaining an example of the configuration of an electronic circuit of an embodiment of an input device with a display screen according to the present invention; [Figure 4] 1 is a cross-sectional view for explaining a main part of a first embodiment of an input device with a display screen according to the present invention. [Diagram 5] 1 is an exploded configuration diagram of a main part of a first embodiment of an input device with a display screen according to the present invention; [Figure 6] FIG. 2 is a schematic diagram for explaining a structure for dissipating heat generated in a display device unit to a rear surface side of the display device unit in the first embodiment of the input device with a display device according to the present invention. [Figure 7] FIG. 13 is a schematic diagram for explaining a structure for dissipating heat generated in a display device unit to a rear surface side of the display device unit in a second embodiment of the input device with a display device according to the present invention. [Figure 8] FIG. 4 is a diagram for explaining a configuration example of a main part of a second embodiment of an input device with a display device according to the present invention; [Figure 9] 13 is a diagram for explaining a part of a main part of another embodiment of an input device with a display screen according to the present invention; FIG. [Figure 10] 13 is a diagram for explaining a part of a main part of another embodiment of an input device with a display screen according to the present invention; FIG. [Figure 11] 1A and 1B are diagrams for explaining a usage mode of an input device with a display screen. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an input device with a display screen according to the present invention will now be described with reference to the drawings.

[0014] [First embodiment] 1 and 2 are a side view and a front view of the appearance of the input device with a display screen 1 of the first embodiment. Also, Fig. 3 is a diagram for explaining an example of the electrical configuration of the input device with a display screen 1 of the first embodiment. First, an outline of the configuration of the input device with a display screen 1 of the first embodiment will be described with reference to Figs. 1 to 3.

[0015] 1 and 2, the input device 1 with a display screen of this embodiment is configured so that the input device main body 11 can be used by being placed at an angle on, for example, a desk using a stand 12. In this example, the stand 12 is made of a metal, such as aluminum, that has a high heat dissipation effect and a higher thermal conductivity than that of the display device unit 2, and includes a connecting portion 12a connected to the back side of the input device main body 11 opposite to the display screen 2D, and a base portion 12b that comes into contact with, for example, the desk surface.

[0016] 1 and 2, the input device main body 11 houses a display device unit 2 having a display screen 2D and a position detection sensor 3 in a housing 110 made of, for example, resin. In this example, the display device unit 2 is configured as a liquid crystal display with a backlight. In this embodiment, the position detection sensor 3 is an electromagnetic induction type position detection sensor, and is housed behind the display screen 2D of the display device unit 2 in a state where it overlaps with the display screen 2D.

[0017] In this embodiment, the entire area of ​​the display screen 2D is the position detection area of ​​the position detection sensor. As shown in Fig. 2, a user can input coordinates on the position detection sensor 3 by holding an electronic pen 4 as an example of a position indicator in his / her hand and indicating a position on the display screen 2D with a pen tip 4a of the electronic pen 4.

[0018] The input device main body 11 includes a position detection circuit 310 housed in the housing 11a, which detects a position on the position detection sensor 3 pointed to by the user with the electronic pen 4. The position detection circuit 310 controls the display device unit 2 to perform a display according to the detected pointed position by the electronic pen 4 on the display screen 2D.

[0019] An example of the configuration of the internal electronic circuit of the input device main body 11 is shown in Fig. 3. As shown in Fig. 3, the electronic pen 4 has, as its circuit configuration, a resonant circuit 4R consisting of a position indication coil 4L and a resonant capacitor 4C connected in parallel to the position indication coil 4L.

[0020] The position detection sensor 3 includes a sensor main body 30 having an X-axis direction loop coil group 302 and a Y-axis direction loop coil group 303 formed on the front and back of a substrate 301, and a magnetic shield plate 32 (described later) attached to the back side (the side opposite the display screen 2D) of the sensor main body 30 via an adhesive layer 31 (see Figures 4 to 6).

[0021] Each of the loop coil groups 302 and 303 is composed of a plurality of rectangular loop coils. The loop coils constituting the loop coil group 302 are arranged so as to be aligned at equal intervals and overlap one another in the horizontal direction (X-axis direction) of the substrate 301 of the rectangular position detection sensor 3. The loop coils constituting the loop coil group 303 are arranged so as to be aligned at equal intervals and overlap one another in the vertical direction (Y-axis direction) of the substrate 301 of the rectangular position detection sensor 3.

[0022] 3, the X-axis direction loop coil group 302 and the Y-axis direction loop coil group 303 of the position detection sensor 3 are connected to a position detection circuit 310 via a selection circuit 304. The selection circuit 304 receives a selection control signal from the position detection circuit 310 and operates to sequentially select loop coils from the two loop coil groups 302, 303 one by one or multiple by one.

[0023] The position detection circuit 310 transmits an AC signal of a predetermined frequency to the electronic pen 4 through the loop coil selected by the selection circuit 304. The electronic pen 4 receives the AC signal from the position detection sensor 3 at the resonant circuit 4R, and also feeds back the AC signal from the resonant circuit 4R to the position detection sensor 3 by electromagnetic induction coupling.

[0024] The feedback signal from the electronic pen 4 is used to select 304 The induced voltage generated in the loop coil selected in is supplied to the position detection circuit 310. The position detection circuit 310 calculates the coordinate values ​​of the position indicated by the electronic pen 4 in the X-axis and Y-axis directions in the detection area of ​​the position detection sensor 3 based on the voltage value level of the induced voltage generated in each loop coil.

[0025] The position detection circuit 310 supplies the calculated coordinate values ​​of the position pointed to by the electronic pen 4 to the display control circuit 320. The display control circuit 320 generates display control information based on the received coordinate values ​​of the position pointed to by the electronic pen 4, supplies the generated display control information to the display device unit 2, and causes a display image corresponding to the position pointed to by the electronic pen 4 to be displayed on the display screen 2D.

[0026] [Configuration Example of Input Device Main Body 11 in the First Embodiment] Fig. 4 is a cross-sectional view for explaining the main part of the input device main body 11. Fig. 5 is an exploded view of the main part of the input device main body 11 in Fig. 4. For convenience of explanation, Fig. 4 shows only the outer contour of the housing 110 of the input device main body 11, without showing a cross section.

[0027] As shown in Fig. 4, a cover glass 5 is disposed on the front side of the housing 110 so as to close the storage space of the housing 110. The periphery of the cover glass 5 is adhered to a front bezel 111 with double-sided tape 112a as shown in Fig. 4. A frame member 113 which is a rectangular ring-shaped member is disposed inside the front bezel 111, and the cover glass 5 is also adhered to this frame member 113 with double-sided tape 112b.

[0028] As shown in FIG. 4, within an area surrounded by this frame member 113, a display device unit 2 and a position detection sensor 3 are disposed in a stacked configuration.

[0029] 5, the display device unit 2 in this embodiment is composed of a high-definition liquid crystal display element 21 of, for example, 4K or 8K, and a backlight unit 22 provided on the back side of the liquid crystal display element 21. The backlight unit 22 uses a high-luminance LED as a light source for the high-definition liquid crystal display element 21 in this example. The cover glass 5 is bonded to the surface of the liquid crystal display element 21 by a direct bonding method in this example.

[0030] In this embodiment, the sensor body 30 of the position detection sensor 3 is attached to the back side of the backlight unit 22 of the display device unit 2 via a high thermal conductive resin layer 6 having a thermal conductivity higher than that of the display device unit 2. As shown in Figures 4 and 5, the position detection sensor 3 has a magnetic shield plate 32 attached to the back side of the sensor body 30 via an adhesive layer 31, as described above. The high thermal conductive resin layer 6 constitutes an example of a first thermal conductive layer.

[0031] In this embodiment, the sensor body 30 is made of a material having a higher thermal conductivity than the display device 2. Board It is constructed using The board is In this example, the magnetic shield plate 32 is made of, for example, a thermally conductive glass epoxy resin. In this example, the magnetic shield plate 32 is made of a member having a higher thermal conductivity than the display device section 2, in this example, SUS, which is an example of a metal material having a higher thermal conductivity than the display device section 2. The adhesive layer 31 is also made of a material having a higher thermal conductivity than the display device section 2. Therefore, the position detection sensor 3 has a higher thermal conductivity than the display device section 2.

[0032] 4 and 5, in this embodiment, the back side of the magnetic shield plate 32 of the position detection sensor 3 is joined to the heat dissipation transfer member 8 via a high thermal conductive resin layer 7 having a thermal conductivity higher than that of the display device unit 2. The high thermal conductive resin layer 7 constitutes an example of a second thermal conductive layer. As the high thermal conductive resin layers 6 and 7, for example, Alpha Gel is used.

[0033] As shown in FIG. 4, the heat dissipation transfer member 8 is joined to the connection portion 12a of the stand 12 with the input device main body 11, and is a member for transferring heat so as to be dissipated through the stand 12, and is made of a material having a higher thermal conductivity than that of the display device unit 2, such as aluminum.

[0034] As described above, the position detection sensor 3 sandwiched between the high thermal conductive resin layers 6 and 7 having a thermal conductivity higher than that of the display device section 2 is attached to the back surface side of the display device section 2 via the high thermal conductive resin layer 6. As described above, the position detection sensor 3 is also configured to have a thermal conductivity higher than that of the display device section 2. In other words, the back surface side of the display device section 2 is configured so that a member having a thermal conductivity higher than that of the display device section 2 is attached to the backlight section 22, which is a heat source of the display device section 2.

[0035] Therefore, heat generated in the backlight unit 22, which is a heat source of the display unit 2, is mainly transferred to the heat dissipation transfer member 8 via the position detection sensor 3 sandwiched between the highly thermally conductive resin layers 6 and 7 on the back side of the display unit 2, and is dissipated via the stand 12. This prevents the display screen 2D side of the display unit 2 from becoming too hot. In this first embodiment, the position detection sensor 3 sandwiched between the highly thermally conductive resin layers 6 and 7, the heat dissipation transfer member 8, and the stand 12 form a heat conductive member on the back side of the display unit 2.

[0036] FIG. 6 is a schematic diagram illustrating a structure for dissipating heat generated in the backlight unit 22, which is a heat source of the display unit 2, to the back side of the display unit 2 in the input device 1 with a display device of this first embodiment.

[0037] 6, the display device unit 2 comprises a liquid crystal display element 21 having a color filter 212 disposed on the front side of a liquid crystal display cell 211, and a backlight unit 22 provided on the back side of the liquid crystal display element 21. The backlight unit 22 comprises a backlight source 221 consisting of a high-luminance LED, and a light guide plate 222 and a diffusion plate 223 provided on the liquid crystal display cell 211 side of the backlight unit 221.

[0038] The position detection sensor 3, which has a magnetic shield plate 32 attached to a sensor main body 30 via an adhesive layer 31, is attached to the backlight light source 221 of the display device 2 via a highly thermally conductive resin layer 6. The magnetic shield plate 32 side of the position detection sensor 3 is attached to a heat dissipation transfer member 8 via a highly thermally conductive resin layer 7.

[0039] As described above, the highly thermally conductive resin layers 6 and 7 have a thermal conductivity higher than that of the display device 2, and the position detection sensor 3 is also configured to have a thermal conductivity higher than that of the display device 2. Therefore, most of the heat generated in the backlight light source 221 of the backlight unit 22 of the display device 2 is transferred to the heat dissipation and transfer member 8 through the position detection sensor 3 sandwiched between the highly thermally conductive resin layers 6 and 7 as shown by the arrows in Fig. 6, and is dissipated through the stand 12 exposed to the outside, and less heat is transferred to the display screen 2D. This prevents the display screen 2D side of the input device 1 with a display screen from becoming too hot.

[0040] In the first embodiment described above, the position detection sensor 3 is an electromagnetic induction type position detection sensor, but the position detection sensor is not limited to an electromagnetic induction type position detection sensor as long as it is configured to have a thermal conductivity higher than that of the display device unit 2.

[0041] [Second embodiment] In the above-described first embodiment, a high thermal conductive resin layer 6 is applied to the rear side of the backlight section 22 of the display device section 2, and the position detection sensor 3 is configured to have a thermal conductivity higher than that of the display device section 2, so that heat generated by the backlight light source 221 is dissipated from the rear side of the display screen 2D of the display device section 2 via the position detection sensor 3.

[0042] In contrast to this, in the second embodiment, the position detection sensor is not configured to have a higher thermal conductivity than the display device unit 2, but is configured to dissipate heat generated by the backlight light source to the rear side of the display screen 2D via a member that acts as a heat pipe. However, even in the second embodiment, the magnetic shield plate of the position detection sensor is configured to have a higher thermal conductivity than the display device unit 2 and is used for heat dissipation.

[0043] The external appearance and electronic circuit configuration of the input device with a display screen 1A of the second embodiment are similar to those of the input device with a display screen 1 of the first embodiment described with reference to Figures 1 to 3. Moreover, except for the portion configured by stacking and combining the display device unit and the position detection sensor, the mechanical configuration of the input device with a display screen 1A of the second embodiment is similar to that of the input device with a display screen 1 of the first embodiment shown in Figure 4.

[0044] The input device with a display screen 1A of the second embodiment differs from the input device with a display screen 1 of the first embodiment in the configuration of a backlight section 22A of a display device section 2A and the configuration for dissipating heat from a backlight light source.

[0045] 7 and 8 are schematic diagrams for explaining a structure for dissipating heat generated in a backlight unit 22A, which is a heat source of the display unit 2A, to the rear side of the display unit 2A in the input device 1A with a display screen of the second embodiment. In Fig. 7 and Fig. 8, the same components as those in the input device 1 with a display screen of the first embodiment are given the same reference numerals, and detailed explanations thereof will be omitted.

[0046] In the display device section 2A of the input device with a display device 1A of the second embodiment, as shown in FIG. 7, a backlight section 22A is provided on the opposite side of the cover glass 5 (display screen 2D side) of the liquid crystal display element 21 consisting of a liquid crystal display cell 211 on which a color filter 212 is formed. However, the configuration of this backlight section 22A is different from that of the display device section 2 of the input device with a display device 1 of the first embodiment.

[0047] That is, in the display device section 2A of the input device with a display device 1A of the second embodiment, the backlight section 22A is composed of a backlight source 221A, a light guide plate 222A, and a diffusion plate 223A, and the light guide plate 222A and the diffusion plate 223A are formed and adhered to the back side of the liquid crystal display element 21, similarly to the display device section 2 in the first embodiment. However, unlike the display device section 2 in the first embodiment, the backlight source 221A is arranged on one side of the upper, lower, left or right of the outer periphery of the rectangular liquid crystal display element 21, or on two opposing sides. Furthermore, the backlight source 221A may be provided on all three or four sides of the outer periphery of the rectangular liquid crystal display element 21.

[0048] 7 and 8, the backlight source 221A is provided on one side of the right side as viewed from the display screen 2D side. The emitted light of this backlight source 221A is guided by the light guide plate 222A so as to spread over the entire display screen 2D, and is diffused by the diffusion plate 223A so as to provide uniform brightness over the entire area of ​​the display screen 2D.

[0049] In the second embodiment, as shown by the diagonal lines in Figures 7 and 8, the backlight source 221A is covered with a highly thermally conductive resin material 9 having a thermal conductivity higher than that of the display device unit 2, and this highly thermally conductive resin material 9 is configured to extend to the rear surface side of the magnetic shield plate 32A of the position detection sensor 3A.

[0050] 7 and 8, the heat dissipation transfer member 8 is attached to the back side of the magnetic shield plate 32A of the position detection sensor 3A via the back side portion 9a of the magnetic shield plate 32A of the highly thermally conductive resin member 9. As the highly thermally conductive resin member 9, for example, Alpha Gel is used.

[0051] Therefore, most of the heat generated by the backlight light source 221A is transferred to the rear side of the magnetic shield plate 32A of the position detection sensor 3A through the highly thermally conductive resin member 9, and is dissipated through the heat dissipation transfer member 8 and the stand 12. That is, the highly thermally conductive resin member 9 serves as a heat pipe that transfers the heat generated by the backlight light source 221A to the rear side of the magnetic shield plate 32A of the position detection sensor 3A. That is, the highly thermally conductive resin member 9 constitutes an example of a heat conduction path. In this second embodiment, the highly thermally conductive resin member 9, the magnetic shield plate 32A of the position detection sensor 3A, the heat dissipation transfer member 8, and the stand 12 constitute a heat conduction member on the rear side of the display device unit 2A.

[0052] The position detection sensor 3A in the second embodiment has a configuration in which a magnetic shield plate 32A is attached to the back side of a sensor main body 30A via an adhesive layer 31A, which is similar to the position detection sensor 3 in the first embodiment. However, the position detection sensor 3A in the second embodiment does not need to be configured to have a thermal conductivity higher than that of the display device 2. However, even in the second embodiment, the magnetic shield plate 32A of the position detection sensor 3A is made of a member having a thermal conductivity higher than that of the display device 2, in this example, SUS, which is an example of a metal material having a thermal conductivity higher than that of the display device 2.

[0053] In this second embodiment example, the position detection sensor 3A is mounted on the back side of the display device unit 2A, opposite the display screen 2D, as shown in Figure 7, allowing for the presence of an air layer AG, as in a normal general configuration.

[0054] As described above, in the second embodiment, most of the heat generated in the backlight light source 221A of the backlight unit 22A of the display unit 2A is transferred to the magnetic shield plate 32A of the position detection sensor 3A and the heat dissipation transfer member 8 through the highly heat-conductive resin member 9 that acts as a heat pipe, and is dissipated through the stand 12 exposed to the outside, and less heat is transferred to the display screen 2D. Therefore, the display screen 2D side of the display screen-equipped input device 1A is prevented from becoming too hot.

[0055] In the second embodiment, it goes without saying that the position detection sensor 3A is not limited to an electromagnetic induction type position detection sensor.

[0056] The examples of Figures 7 and 8 described above are configuration examples in which the backlight light source 221A is provided on one side of the rectangular display screen 2D, but when providing the backlight light source on, for example, two opposing upper and lower sides, two opposing left and right sides, or even on a third or fourth side, the highly thermally conductive resin member 9 constituting a heat pipe is provided so as to extend from each of the backlight light sources provided on each side to the back side of the magnetic shield plate 32A of the position detection sensor 3A.

[0057] Moreover, a configuration may be adopted in which the above-mentioned first and second embodiments are combined. That is, the position detection sensor 3A may be configured to have a thermal conductivity higher than that of the display device unit 2, and the position detection sensor 3A may be configured to be attached to the display device unit 2A (the light guide plate 222A in the example of FIG. 7) via a highly thermally conductive resin member without interposing an air layer AG therebetween.

[0058] In this case, the heat generated by the backlight light source 221A is transferred directly to the heat dissipation transfer member 8 through the high thermal conductivity member 9, and also via the position detection sensor 3A and the high thermal conductivity member 9 attached to the magnetic shield plate 32A to the heat dissipation transfer member 8. Therefore, the heat generated by the backlight light source 221A is more efficiently dissipated on the back side of the display screen 2D.

[0059] [Other embodiments or modifications] In the above embodiment, the joint 12a of the stand 12 joined to the heat dissipation transfer member 8 is configured in a flat plate shape, but a greater heat dissipation effect can be obtained by configuring the heat dissipation area to be larger by increasing the area of ​​the outer surface of the heat dissipation transfer member 8, such as by configuring the joint 12H shown in Fig. 9 to have a plurality of slits SL. The heat dissipation transfer member 8 may also be configured to have a larger heat dissipation area.

[0060] Also, the magnetic shield plates 32, 32A of the position detection sensors 3, 3A may be configured as heat dissipation members. In that case, as shown in Figures 10(A) and (B), the magnetic shield plates 32, 32A may be embossed to form an uneven pattern on the surface of the magnetic shield plates 32, 32A opposite to the sensor body side, thereby increasing the heat dissipation area of ​​the magnetic shield plates 32, 32A. Also, the magnetic shield plates 32, 32A of the position detection sensors 3, 3A of the above-mentioned embodiments may be configured to be embossed as shown in Figure 10.

[0061] Although the display screen-equipped input device 1, 1A of the first and second embodiments described above is configured with a stand, it may be configured without a stand. In that case, a heat dissipation member joined to a heat transfer member is provided on the side of the housing of the display screen-equipped input device opposite the display screen side. Alternatively, a part or the whole of the side of the housing of the display screen-equipped input device opposite the display screen side may be configured as a heat dissipation member joined to a heat transfer member. [Explanation of symbols]

[0062] 1,1A...input device with display screen, 2,2A...display device section, 3,3A...position detection sensor, 6,7...highly thermally conductive resin layer, 8...heat dissipation transfer member, 9...highly thermally conductive resin member, 11...input device body, 12...stand, 21...liquid crystal display element, 22,22A...backlight section, 30,30A...sensor body section, 32,32A...magnetic shield plate

Claims

1. An input device with a display screen, comprising: a display device section having a display screen; and a position detection sensor disposed on a rear side of the display screen in a state where the position detection sensor is superimposed on the display screen, the input device detecting an input position indicated by a position indicator using the position detection sensor, the position detection sensor is configured to have a thermal conductivity higher than that of the display device unit, and is attached to a rear surface side of the display screen of the display device unit via a first thermal conductive layer having a thermal conductivity higher than that of the display device unit; a second thermally conductive layer having a thermal conductivity higher than that of the display device unit is provided on a side of the position detection sensor opposite to a side where the position detection sensor is attached to the display device unit; a heat dissipation member having a thermal conductivity higher than that of the display device portion exposed to the outside is attached via the second thermal conduction layer, the heat dissipation member exposed to the outside includes a stand for supporting the display screen, and the stand is provided with a slit for increasing an area of ​​an outer surface of the heat dissipation member; The heat generated in the display device is dissipated on the rear side of the display screen.

1. An input device with a display screen.

2. The position detection sensor is an electromagnetic induction type position detection sensor, and is provided with a magnetic shield plate having a thermal conductivity higher than that of the display device unit on the side opposite to the side where the position detection sensor is attached to the display device unit.

2. The input device with a display screen according to claim 1.

3. The magnetic shield plate of the position detection sensor is attached to the heat dissipation member via the second thermal conductive layer.

3. The input device with a display screen according to claim 2.

4. The magnetic shield plate is made of a metal sheet having a thermal conductivity higher than that of the display unit.

3. The input device with a display screen according to claim 2.

5. The magnetic shield plate is made of an embossed magnetic sheet.

3. The input device with a display screen according to claim 2.

6. The position detection sensor is an electromagnetic induction type position detection sensor, and a position detection electrode is formed on a substrate having a thermal conductivity higher than that of the display unit.

2. The input device with a display screen according to claim 1.

7. The display device is a liquid crystal display and includes a backlight unit. The position detection sensor is attached to the back side of the display screen of the display device unit via the first thermally conductive layer having a thermal conductivity higher than that of the display device unit.

2. The input device with a display screen according to claim 1.

8. An input device with a display screen, comprising: a display device unit having a display screen; and a position detection sensor disposed on the back side of the display screen in a state superimposed on the display screen, the input device detecting an input position indicated by a position indicator using the position detection sensor, The display device is a liquid crystal display and includes a backlight unit. the position detection sensor is an electromagnetic induction type position detection sensor, and includes a magnetic shield plate having a thermal conductivity higher than that of the display device unit on an opposite side to the display device unit; a heat conduction path formed of a material having a higher thermal conductivity than the display unit, the heat conduction path being connected between the backlight unit and the magnetic shield plate of the position detection sensor; the magnetic shield plate of the position detection sensor is attached, via the heat conduction path, to a heat dissipation member having a thermal conductivity higher than the thermal conductivity of the display unit exposed to the outside, the heat dissipation member exposed to the outside includes a stand for supporting the display screen, and the stand is provided with a slit for increasing an area of ​​an outer surface of the heat dissipation member; The heat generated in the display device is dissipated on the rear side of the display screen.

1. An input device with a display screen.

9. The position detection sensor is disposed with respect to the display unit via an air gap.

9. The input device with a display screen according to claim 8.

Images