Touch Input Display System

Abstract

To provide a touch input display system capable of obtaining high light-receiving performance for infrared light emitted from an external operation device.SOLUTION: A touch input display system 10 comprises a display device 12 and a touch input device 13. The display device 12 includes a display portion 20, a frame 22 enclosing the display portion 20, and a light-receiving portion 52 that receives infrared light emitted from an external operation device. The touch input device 13 includes a touch input portion 30 and a frame body 32 that encloses the touch input portion 30. The touch input device 13 is attached to the display portion 20 so that the frame body 32 overlaps on a front side of the frame 22. An infrared light guide portion 40 is provided on the frame body 32. The infrared light guide portion 40 guides the infrared light emitted from the external operation device to the light-receiving portion 52.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a touch input display system. [Background technology]

[0002] Patent Document 1 describes a tablet input device that is attached to the front of a liquid crystal display. The tablet input device is equipped with a transparent touch panel. By attaching the tablet input device to the liquid crystal display, the user can perform touch operations by pressing a specific position based on the screen display of the liquid crystal display. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2000-311059 A Summary of the Invention [Problem to be solved by the invention]

[0004] In addition to touch input devices that accept touch operations, such as tablet input devices, external operation devices that emit infrared light are sometimes used as input devices for display devices such as liquid crystal displays. A light receiving unit that receives infrared light emitted from an external operation device, such as a remote controller, is often provided in the bezel (a frame that surrounds the periphery of the display unit) of the display device.

[0005] When the tablet input device described in Patent Document 1 is attached to a display device having a light receiving unit provided in a bezel, the tablet input device covers the bezel, degrading the light receiving performance of the light receiving unit.

[0006] In view of the above problems, an object of the present invention is to provide a touch input display system that can obtain high light receiving performance for infrared light emitted from an external device when a touch input device is attached to a display device. [Means for solving the problem]

[0007] In order to solve the above problem, the touch input display system of the present invention includes a display device and a touch input device. The touch input device is attached to the display device. The display device includes a display unit, a frame, and a light receiving unit. The display unit displays an image. The frame surrounds the periphery of the display unit. The light receiving unit is provided in the frame and receives infrared light emitted from an external operation device. The touch input device includes a touch input unit, a frame, and an infrared light guide unit. The frame surrounds the touch input unit. The infrared light guide unit is provided in the frame and guides the infrared light emitted from the external operation device. The touch input device is attached to the display unit so that the frame overlaps the front side of the frame. The infrared light guide unit guides the infrared light emitted from the external operation device to the light receiving unit when the touch input device is attached to the display device. Effect of the Invention

[0008] According to the present invention, when a touch input device is attached to a display device, an infrared light guide section provided on the frame of the touch input device guides infrared light emitted from an external device to a light receiving section of the display device, thereby improving the light receiving performance of the display device. [Brief description of the drawings]

[0009] [Figure 1] 1 is a perspective view illustrating a touch input display system as an example of an embodiment; [Diagram 2] 2 is a rear view and a partially enlarged view of the touch input display system of FIG. 1. [Diagram 3] FIG. 2 is a cross-sectional view taken along line III-III of FIG. [Figure 4] FIG. 2 is a perspective view of a cross section taken along line III-III of FIG. [Diagram 5] FIG. 11 is a cross-sectional perspective view of a touch input display system according to another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] 1 is a perspective view showing a touch input display system 10 as an example of an embodiment. The touch input display system 10 includes a display device 12 and a touch input device 13 attached to the display device 12. The display device 12 is, for example, a ready-made product that functions independently, and a specific example is a liquid crystal display device. The touch input device 13 is, for example, an external touch input device that is attached as an option to the ready-made display device 12, and a specific example is a touch panel.

[0011] The display device 12 in the touch input display system 10 in Fig. 1 includes a display unit 20, a frame 22, and a light receiving unit 50. The display unit 20 displays information such as images to a user. The display unit 20 is, for example, a liquid crystal screen of a liquid crystal display device. The frame 22 surrounds the periphery of the display unit 20.

[0012] Although it cannot be seen from the front side of the touch input display system 10, a light receiving device 50, indicated by a dashed line in Fig. 1, is disposed on the rear side of the frame 22. The light receiving device 50 includes a light receiving unit 52. The light receiving unit 52 receives infrared light emitted from an external operation device 60 such as a remote control. The light receiving unit 52 includes an infrared light sensor equipped with a light receiving element (e.g., a photodiode) that reacts to infrared light. The light receiving device 50 processes the infrared light received by the light receiving unit 52 and converts it into an electrical signal.

[0013] The touch input device 13 in FIG. 1 includes a touch input unit 30, a frame body 32, and an infrared light guide unit 40. The touch input unit 30 is a part that accepts touch input from a user, and is, for example, a touch panel. The frame body 32 surrounds the touch input unit 30. The frame body 32 is provided with an infrared light guide unit 40. The infrared light guide unit 40 guides infrared light emitted from the external operation device 60 to the light receiving unit 52 of the light receiving device 50 in a state in which the touch input device 13 is attached to the display device 12. As shown in FIG. 1, the touch input device 13 is attached to the display unit 20 so that the frame body 32 overlaps the front side of the frame 22.

[0014] The touch input device 13 includes a first region 31, a second region 33, and a third region 34. The first region 31 covers the display unit 20. The first region 31 is an inner region of the touch input unit 30 that overlaps the front side of the display unit 20. The second region 33 is located outside the first region 31. The second region 33 is an area that overlaps the front side of the frame 22 and is a peripheral region of the first region 31. The second region 33 has a lower transmittance than the first region 31. Specifically, for example, the first region 31 may be composed of a transparent touch panel, and the second region 33 may be provided with a black mask as a light shielding section. The third region 34 is located in the second region 33. The third region 34 covers the infrared light guide unit 40. The third region 34 reflects or diffuses infrared light toward the inside of the infrared light guide unit 40. Moreover, the infrared light guide section 40 reflects or diffuses the infrared light and guides it to the light receiving section 52 .

[0015] A user of the touch input display system 10 can perform an input to the touch input display system 10 by performing a touch operation at a predetermined position on the touch input unit 30 based on the screen display of the display unit 20. The user can also perform an input to the touch input display system 10 by using the external operation device 60 to emit infrared light to the light receiving device 50.

[0016] Next, the touch input display system 10 will be described in more detail with reference to FIG. 2. FIG. 2 is a rear view and a partially enlarged view of the touch input display system 10 of FIG. 1. As shown in FIG. 2, the outer periphery of the display device 12 in rear view is the peripheral surface 43 of the frame 22. A light receiving device 50 is provided on a part of the peripheral surface 43 of the frame 22. As shown in a partially enlarged view (perspective view) in a speech bubble in FIG. 2, the light receiving device 50 in FIG. 2 includes a light receiving unit 52 and a pull-out knob 55. In FIG. 2, the light receiving unit 52 protrudes from a part of the peripheral surface 43 of the frame 22. Here, the light receiving unit 52 may be provided so as to be retractable into the light receiving device 50. For example, it is preferable that the pull-out knob 55 of the light receiving device 50 is mechanically connected to the light receiving unit 52 so as to move together with the light receiving unit 52. In FIG. 2, the light receiving section 52 can be switched between a state in which it is housed in the light receiving device 50 and a state in which it protrudes from the light receiving device 50 by sliding the pull-out knob 55.

[0017] Next, the touch input device 13 will be described in more detail with reference to Fig. 3. Fig. 3 is a cross-sectional view taken along line III-III in Fig. 1. As shown in Fig. 3, a frame 32 of the touch input device 13 supports a touch input unit 30 extending in the left-right direction in Fig. 3. Since the frame 32 overlaps the front side of the frame 22, the touch input unit 30 is disposed so as to overlap the front side (upper part in Fig. 3) of the display unit 20 of the display device 12.

[0018] In second region 33 located on the front side of frame 22 surrounding display unit 20, in a part of the region outside frame 22, an inlet 41 for infrared light entering infrared light guide unit 40 is located. As shown by imaginary lines in Fig. 3, infrared light guide unit 40 is provided in a portion of frame body 32 that forms a gap between frame 22. Inlet 41 is covered with third region 34.

[0019] The third region 34 reflects or diffuses the infrared light toward the inside of the infrared light guide 40. Therefore, as shown in FIG. 3, the infrared light 62, 63 incident on the inlet 41 through the third region 34 is guided into the infrared light guide 40. The infrared light guide 40 includes a reflecting member that reflects the infrared light. Specifically, in the infrared light guide 40, a reflecting member (e.g., a mirror or a metal tape) that reflects the infrared light is provided on the inner surface 35 of the frame 32 and the peripheral surface 43 of the frame 22. The infrared light 62, 63 is repeatedly reflected by the reflecting member and is guided to the light receiving portion 52 that protrudes from a part of the peripheral surface 43 of the frame 22.

[0020] Since the infrared light is guided to the light receiving unit 52 by the reflecting member of the infrared light guide unit 40, even infrared light 62, 63 incident from a direction with a large angle to the light receiving unit 52 as shown in FIG. 3 can be received by the light receiving unit 52. That is, the light receiving range 65 shown in FIG. 3 means that the touch input display system 10 of this embodiment can receive light from a wide range, and high light receiving performance can be obtained. In particular, the touch input display system 10 of this embodiment can receive infrared light emitted from a direction toward the center of the display unit 20, such as the infrared light 62 shown in FIG. 3. Therefore, the light receiving performance of the touch input display system 10 of this embodiment is significantly improved compared to the case where the display device 12 is used alone and the case where a touch input device without the infrared light guide unit 40 is attached to the display device 12.

[0021] The infrared light guide unit 40 in FIG. 3 has a light guide path that extends in a direction (vertical direction in FIG. 3) intersecting the surface of the touch input device 13 (surface of the touch input unit 30). In FIG. 3, the light guide path is a path sandwiched between the inner surface 35 of the frame body 32 and the peripheral surface 43 of the frame 22. The light receiving unit 52 is disposed on the light guide path and is capable of receiving infrared light passing through the light guide path. The path of the infrared light guide unit 40 is not limited to that shown in FIG. 3, and the infrared light guide unit 40 may have any path as long as the light incident on the entrance 41 is guided to the light receiving unit 52. For example, the infrared light guide unit 40 may be bent. Even when the infrared light guide unit 40 is bent, the light incident on the entrance 41 is guided to the light receiving unit 52 by a reflecting member. Even if the infrared light guide unit 40 has a complex path and does not include a reflective member, if a transparent light guide member including a transparent member that guides light along the path is arranged, the infrared light guide unit 40 can guide the infrared light to the light receiving unit 52. A transparent light guide member is, for example, a member that guides light that enters the inside of a transparent member by utilizing total reflection at an interface, and specific examples include a light guide plate and an optical fiber.

[0022] On the opposite side of the entrance 41 of the infrared light guide 40 is the exit 48. The area of ​​the entrance 41 is preferably larger than the area of ​​the exit 48. As the infrared light guide 40 becomes smaller from the entrance 41 toward the exit 48, it becomes easier for the light receiving unit 52 arranged on the exit 48 side to receive the infrared light incident from the entrance 41. In particular, if the entrance 41 is larger than the area of ​​the light receiving unit 52 that directly receives the infrared light, the light receiving unit 52 can receive the infrared light arriving from a wider range.

[0023] FIG. 4 shows an example in which the area of ​​the entrance 41 of the infrared light guide 40 is larger than the area of ​​the exit 48. FIG. 4 is a perspective view of the III-III cross section of FIG. 1. The infrared light guide 40 of FIG. 4 includes a cylinder 46 shown by a virtual line. The light guide path of the infrared light guide 40 is located inside the cylinder 46. The cylinder 46 is a cylindrical member made of a reflecting member (such as a mirror or a metal tape) that reflects infrared light, and has a square tube shape in FIG. 4. Due to the presence of the cylinder 46, the optical path of the infrared light incident on the infrared light guide 40 is limited to the inside of the cylinder 46, and the infrared light does not leak to the outside. Therefore, the loss of the infrared light until it is guided to the light receiving unit 52 is reduced, and the light receiving performance is improved. The cylinder 46 may have any shape as long as it can guide the infrared light to the light receiving unit 52, and may have, for example, a cylindrical shape.

[0024] Of cylinder 46, no reflective member is arranged on the surface in front-rear direction 73 (the direction intersecting the surface of touch input device 13), and the surface is open. The surface on the front side (upper side in FIG. 4) of cylinder 46 is entrance 41 of infrared light guide unit 40, and is open to third region 34. And the surface on the rear side (lower side in FIG. 4) of cylinder 46 is exit 48 of infrared light guide unit 40, and is open to light receiving unit 52. As shown in FIG. 4, the area of ​​entrance 41 of infrared light guide unit 40 is larger than the area of ​​exit 48.

[0025] 4 includes a first side surface 42, a second side surface 44, and a third side surface 45, and is surrounded by a peripheral surface 43, the first side surface 42, the second side surface 44, and the third side surface 45 of the frame 22. If a reflective member is provided on each of the peripheral surface 43, the first side surface 42, the second side surface 44, and the third side surface 45 of the frame 22, the infrared light that enters the inlet 41 will be more easily guided to the light receiving unit 52.

[0026] The first side surface 42 of the cylindrical body 46 faces a part of the peripheral surface 43 of the frame 22 in a first direction 71 from the frame 22 toward the framework 32 .

[0027] The second side surface 44 of the cylinder 46 extends along the first direction 71. The third side surface 45 of the infrared light guide 40 extends along the first direction 71 and faces the second side surface 44 in a second direction 72 that intersects with the first direction 71.

[0028] Further, the light receiving unit 52 protrudes from a part of the peripheral surface 43 of the frame 22 which the first side surface 42 faces. In Fig. 4, the infrared light incident on the entrance 41 is guided to the light receiving unit 52 by the infrared light guide unit 40 surrounded by the peripheral surface 43, the first side surface 42, the second side surface 44, and the third side surface 45 of the frame 22. Therefore, most of the infrared light incident on the entrance 41 is received by the light receiving unit 52.

[0029] As described above, the second region 33 of the touch input unit 30, which is located outside the first region 31 covering the display unit 20 and overlaps the front side of the frame 22, has a lower transmittance than the first region 31. In addition, the entrance 41 of the infrared light guide unit 40 is covered with the third region 34.

[0030] Third region 34 is designed to diffuse infrared light by, for example, frosted glass processing. Then, infrared light that enters entrance 41 through third region 34 diffuses within infrared light guide 40 and is guided to light receiving portion 52. Since third region 34 is designed to diffuse infrared light, infrared light is guided by infrared light guide 40 regardless of the angle at which it enters third region 34.

[0031] In the touch input display system 10 of this embodiment, the frame 32 of the touch input device 13 is attached so as to overlap with the front side of the frame 22 of the display device 12. Then, the infrared light guide section 40 provided on the frame 32 of the touch input device 13 guides infrared light from an external operation device 60 such as a remote control to the light receiving section 52. According to this touch input display system 10, even if the frame 32 is placed on the front side of the frame 22 on which the light receiving section 52 is provided, the infrared light from the external operation device 60 is guided to the light receiving section 52 by the infrared light guide section 40, so that the light receiving performance of the display device 12 does not deteriorate.

[0032] In addition, since the infrared light guide unit 40 has a light guide path that extends in a direction intersecting the surface of the touch input device 13, and the cylindrical body 46 in which the light guide path is located, the loss of infrared light until it is guided to the light receiving unit 52 is reduced (most of the infrared light is received), and the light receiving performance is improved.

[0033] In addition, since the area of ​​entrance 41 of infrared light guide 40 is larger than the area of ​​exit 48, light receiving section 52 can receive infrared light coming from a wider range. That is, the infrared receiving range of display device 12 is widened, and light receiving performance is improved.

[0034] Furthermore, since infrared light guide 40 includes a reflective member that reflects infrared light, even infrared light incident from a direction at a large angle to light receiving unit 52 can be received by light receiving unit 52. That is, the infrared receiving range of display device 12 is widened, and light receiving performance is improved.

[0035] Moreover, since the infrared light guide 40 includes the first side surface 42, the second side surface 44, and the third side surface 45, the incident infrared light can be surrounded by the multiple side surfaces and guided to the light receiving unit 52. Therefore, the loss of the infrared light until it is guided to the light receiving unit 52 is reduced, and the light receiving performance is improved.

[0036] In addition, because third region 34 covering infrared light guide 40 diffuses infrared light, the infrared light is guided by infrared light guide 40 regardless of the angle at which the infrared light is incident on third region 34. That is, the infrared light receiving range of display device 12 is widened, and the light receiving performance is improved.

[0037] Fig. 5 is a cross-sectional perspective view showing another example of an embodiment of the touch input display system 10. Fig. 5 shows the same range as Fig. 4. In Fig. 5, the cylinder 46 of Fig. 4 does not exist, and the infrared light guide unit 80 includes a first side surface 82, a second side surface 84, and a third side surface 85. In Fig. 5, components other than the infrared light guide unit 80 are assigned the same reference numerals as in Fig. 4, and the same reference numerals as in Fig. 4 indicate the same components as in Fig. 4.

[0038] The front side of infrared light guide unit 80 in front-rear direction 73 (upper side in Fig. 5) is entrance 81 of infrared light guide unit 80. Entrance 81 is open to third region 34 of display unit 20. The rear side of infrared light guide unit 80 (lower side in Fig. 5) is exit 88 of infrared light guide unit 80. Exit 88 is an open surface, and has a larger area than light receiving unit 52. The area of ​​entrance 81 is larger than the area of ​​exit 88.

[0039] 5, a first side surface 82 of the infrared light guide 80 faces a part of the peripheral surface 43 of the frame 22 in a first direction 71 from the frame 22 toward the frame body 32. A second side surface 84 of the infrared light guide 80 extends along the first direction 71. A third side surface 85 of the infrared light guide 80 extends along the first direction 71 and faces the second side surface 84 in a second direction 72 intersecting the first direction 71.

[0040] The light receiving unit 52 of the light receiving device 50 protrudes from a part of the peripheral surface 43 of the frame 22 to which the first side surface 82 faces. In the embodiment shown in FIG. 5, the light receiving unit 52 is located inside the infrared light guide 80 surrounded by the peripheral surface 43 of the frame 22, the first side surface 82, the second side surface 84, and the third side surface 85. The infrared light that enters the entrance 41 through the third region 34 is guided to the light receiving unit 52 on the exit 88 side without leaking out of the infrared light guide 80. Therefore, most of the infrared light that enters the entrance 41 is received by the light receiving unit 52.

[0041] In particular, if reflective members are provided on the peripheral surface 43, the first side surface 82, the second side surface 84, and the third side surface 85 of the frame 22 surrounding the infrared light guide unit 80, infrared light incident on the inlet 41 from any angle is guided to the light receiving unit 52. That is, even infrared light at a large angle relative to the light receiving unit 52 is guided to the light receiving unit 52. In particular, infrared light emitted from a direction toward the center of the display unit 20 is guided to the light receiving unit 52. Therefore, even in the other example of the embodiment shown in FIG. 5, the light receiving performance of the display device 12 included in the touch input display system 10 is significantly improved.

[0042] The embodiments of the present invention have been described above with reference to the drawings. However, the present invention is not limited to the above embodiments, and can be implemented in various aspects without departing from the gist of the present invention. The drawings are mainly schematic illustrations of each component for ease of understanding, and the thickness, length, number, spacing, etc. of each component shown in the drawings are different from the actual ones due to the convenience of drawing. In addition, the material, shape, dimensions, etc. of each component shown in the above embodiments are merely examples and are not particularly limited, and various modifications are possible within a range that does not substantially deviate from the configuration of the present invention. [Industrial Applicability]

[0043] The present invention can be used in a touch input display system including a display device and a touch input device attached to the display device. As a specific example, the present invention can be used in a touch input display system including an image display device such as a liquid crystal display device or a television device, and an overlay type touch panel attached to the image display device. [Explanation of symbols]

[0044] 10 Touch Input Display System 12 Display device 13 Touch Input Devices 20 Display section 22 Picture Frame 30 Touch input section 31 First area 32 Frame 33 Second area 34 Third area 35 Inner surface of frame 40 Infrared light guide unit 41 Entrance 42 First aspect 43 Frame Surface 44 Second aspect 45 Third aspect 46 Cylinder 48 Exit 50 Photodetector 52 Light receiving section 55 Drawer knob 60 External operating device 62 Infrared light 63 Infrared Light 65 Reception range 71 1st direction 72 Second direction 73 Anteroposterior direction 80 Infrared light guide unit 81 Entrance 82 First aspect 84 Second aspect 85 Third aspect 88 Exit

Claims

1. 1. A touch input display system including a display device and a touch input device attached to the display device, The display device includes: A display unit for displaying an image; A frame surrounding the display unit; a light receiving unit provided on the frame and configured to receive infrared light emitted from an external operating device; Equipped with The touch input device comprises: A touch input unit; A frame surrounding the touch input unit; an infrared light guide portion provided on the frame body and guiding the infrared light emitted from the external operation device; Equipped with the touch input device is attached to the display unit such that the frame body overlaps with a front side of the frame; The infrared light guide section guides the infrared light emitted from the external operation device to the light receiving section when the touch input device is attached to the display device.

2. the infrared light guide portion has a light guide path extending in a direction intersecting a surface of the touch input device; The touch input display system according to claim 1 , wherein the light receiving portion is disposed on the light guide path.

3. The touch input display system of claim 2 , wherein the infrared light guide further comprises a cylinder in which the light guide is located.

4. The touch input display system according to claim 1 , wherein an area of ​​the infrared light entrance of the infrared light guide portion is larger than an area of ​​the infrared light exit of the infrared light guide portion.

5. The touch input display system according to claim 1 , wherein the infrared light guide portion includes a reflective member that reflects the infrared light.

6. the infrared light guide portion includes a first side, a second side, and a third side; The first side surface faces a part of a peripheral surface of the frame in a first direction from the frame to the frame body, The second side extends along the first direction, the third side surface extends along the first direction and faces the second side surface in a second direction intersecting the first direction; The touch input display system according to claim 1 , wherein the light receiving portion protrudes from a portion of the circumferential surface of the frame.

7. The touch input device comprises: A first region covering the display unit; a second region located outside the first region and having a lower transmittance than the first region; a third region located in the second region and covering the infrared light guide; Including, The touch input display system of claim 1 , wherein the third region diffuses the infrared light.

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