Touch input device

Abstract

The invention discloses a touch input device which comprises a circuit board, a plurality of light-emitting elements, a spacer, a plurality of light guide sheets, a shading plate and a top plate. The circuit board is provided with an upper surface and board side edges, and the upper surface is provided with a plurality of sensing areas; the plurality of light-emitting elements are arranged on the upper surface of the circuit board; the spacer is arranged on the circuit board and is provided with a light leakage edge and a plurality of accommodating holes; the plurality of accommodating holes are used for accommodating a plurality of light-emitting elements and a plurality of light guide sheets; the shading plate comprises a main plate section, a first extension section and a second extension section, the main plate section covers the distance piece and is provided with a plurality of light-transmitting areas, and the light-transmitting areas correspond to the light guide pieces respectively; the first extension section covers the light leakage edge of the spacer and the board side edge of the circuit board; the second extension section is combined with the circuit board; the top plate is arranged on the main board section and provided with a plurality of light emitting areas. The light leakage edge and the board side edge of the circuit board are wrapped by the first extension section of the light shielding board, and the light leakage edge and the board side edge of the light shielding board are wrapped by the first extension section of the reflecting layer, so that the light leakage condition is avoided.

Description

Technical Field

[0001] The present invention relates to an input device for an electronic device, and in particular to a touch input device. Background Art

[0002] The input device of an electronic device, such as a keyboard, is used for the user to press to transmit input signals to the electronic device. A common keyboard includes multiple independent keys, and the type of keys may be, for example, mechanical keys, membrane switch keys, or optical sensor switch keys. Mechanical keys have a more complex structure and are larger in size, and are not suitable for use in electronic devices that require higher thinness (such as notebook computers). Currently, the keyboards used in thin electronic devices are mainly membrane switch keys, but more and more keyboards are beginning to use optical sensor switch keys as the keyboard key type.

[0003] As the functions of thin electronic devices increase, their input devices include touch function bars in addition to keyboards. The touch function bars have multiple touch areas for users to touch and operate, so that the electronic devices can perform different functions. In the prior art, a backlight module is provided inside the touch function bar to illuminate the touch function bar. If the backlight module is not properly assembled, light leakage may occur in the touch function bar. Summary of the invention

[0004] In view of the problems in the prior art, the present invention provides a touch input device to solve the above problems.

[0005] Therefore, the technical problem to be solved by the present invention is to provide a touch input device, the touch input device comprising:

[0006] A circuit board, the circuit board having an upper surface, a lower surface and a side edge of the board, the upper surface having a plurality of sensing areas, the plurality of sensing areas being arranged along a long axis;

[0007] A plurality of light emitting elements, the plurality of light emitting elements are disposed on the upper surface of the circuit board and arranged along the long axis;

[0008] A spacer, the spacer is disposed above the upper surface of the circuit board, the spacer has a top surface, a bottom surface and a light leakage edge, and the spacer has a plurality of accommodating holes, the plurality of accommodating holes penetrate the top surface and the bottom surface, the plurality of accommodating holes are arranged along the long axis and respectively correspond to the plurality of sensing areas, and the light leakage edge corresponds to the side edge of the circuit board; wherein the plurality of light-emitting elements protrude into the plurality of accommodating holes respectively;

[0009] A plurality of light guide sheets, the plurality of light guide sheets are respectively disposed in the plurality of receiving holes of the spacer;

[0010] a light shielding plate, the light shielding plate comprising a main board section, a first extension section and a second extension section, the main board section covers the top surface of the spacer, the main board section has a plurality of light-transmitting areas, the plurality of light-transmitting areas are arranged along the long axis, and the plurality of light-transmitting areas respectively correspond to the plurality of light guide plates; the first extension section covers the light-leaking edge of the spacer and the side edge of the circuit board; the second extension section is connected to the first extension section and combined with the lower surface of the circuit board; and

[0011] A top plate is arranged on the main board section of the shading plate, and the top plate has a plurality of light emitting areas, which are arranged along the long axis and respectively correspond to the plurality of light-transmitting areas of the main board section.

[0012] As an optional technical solution, each of the light-emitting elements is located between the corresponding sensing area of ​​the circuit board and the side edge of the board.

[0013] As an optional technical solution, the circuit board has two opposite long sides in the short axis direction, and each of the long sides extends along the long axis direction, and the long side of the two long sides closer to the multiple light-emitting elements constitutes the side edge of the board.

[0014] As an optional technical solution, the spacer has a first spacer section and a second spacer section in the short axis direction, the first spacer section has the multiple accommodating holes, and the second spacer section has the light leakage edge; the second extension section of the shading plate extends at least to the lower surface of the circuit board and is located directly below the second spacer section.

[0015] As an optional technical solution, the second extension section of the shading plate extends to the lower surface of the circuit board and is located directly below the multiple light-emitting elements, or the second extension section of the shading plate extends to the lower surface of the circuit board and is located directly below the multiple sensing areas.

[0016] As an optional technical solution, the second extension section of the shading plate extends to directly below the multiple sensing areas, and the second extension section of the shading plate has multiple heat dissipation holes, which are arranged along the long axis and are respectively located directly below the multiple light-emitting elements.

[0017] As an optional technical solution, each of the light guide plates has a receiving portion, and each of the light emitting elements protrudes into the corresponding receiving portion of the light guide plate; each of the light emitting elements has a side emitting surface, and the side emitting surface of each of the light emitting elements faces the wall surface of the receiving portion of the corresponding light guide plate.

[0018] As an optional technical solution, the touch input device further includes a reflective layer, which is arranged between the upper surface of the circuit board and the bottom surface of the spacer. The reflective layer has a plurality of through holes, which are arranged along the long axis and through which the plurality of light-emitting elements pass respectively.

[0019] As an optional technical solution, the reflective layer has a plurality of openings, and the plurality of openings are arranged along the long axis and respectively correspond to the plurality of accommodating holes and the plurality of sensing areas of the circuit board.

[0020] As an optional technical solution, each of the light emitting areas of the top plate, each of the light transmitting areas of the main board segment of the shading plate, and each of the sensing areas on the circuit board overlap in the stacking axis.

[0021] As an optional technical solution, the shading plate includes a transparent substrate and at least one shading layer, the at least one shading layer is disposed on the transparent substrate, and the at least one shading layer overlaps with the plurality of light emitting elements in the stacking axis.

[0022] The present invention further provides a touch input device, the touch input device comprising:

[0023] A circuit board, the circuit board having an upper surface and a lower surface, the upper surface having a plurality of sensing areas, the plurality of sensing areas being arranged along a long axis;

[0024] A plurality of light emitting elements, the plurality of light emitting elements are disposed on the upper surface of the circuit board and arranged along the long axis;

[0025] a reflective layer, the reflective layer comprising a main reflective section, a first extension section and a second extension section, wherein the main reflective section is disposed on the upper surface of the circuit board, the main reflective section has a plurality of through holes, the plurality of through holes are arranged along the long axis and the plurality of light emitting elements pass through the plurality of through holes respectively;

[0026] A spacer, the spacer is disposed on the main reflection section of the reflection layer, the spacer has a top surface, a bottom surface and a light leakage edge, and the spacer has a plurality of accommodating holes, the plurality of accommodating holes penetrate the top surface and the bottom surface, the plurality of accommodating holes are arranged along the long axis and respectively correspond to the plurality of sensing areas and the plurality of through holes, wherein the plurality of light-emitting elements protrude into the plurality of accommodating holes respectively;

[0027] A plurality of light guide sheets, the plurality of light guide sheets are respectively disposed in the plurality of receiving holes of the spacer;

[0028] a light shielding plate, the light shielding plate covering the top surface of the spacer, the light shielding plate having a plate side edge and a plurality of light-transmitting areas, the plate side edge corresponding to the light-leaking edge of the spacer, the plurality of light-transmitting areas arranged along the long axis, and the plurality of light-transmitting areas respectively corresponding to the plurality of light guide sheets; and

[0029] A top plate, the top plate is arranged on the shading plate, the top plate has a plurality of light emitting areas, the plurality of light emitting areas are arranged along the long axis and respectively correspond to the plurality of light transmission areas of the shading plate;

[0030] The first extension section of the reflective layer covers the light leakage edge of the spacer and the plate side edge of the light shielding plate; the second extension section of the reflective layer is connected to the first extension section and combined with the top plate.

[0031] As an optional technical solution, the main reflection section has a plurality of openings, and the plurality of openings are arranged along the long axis and respectively correspond to the plurality of accommodating holes and the plurality of sensing areas of the circuit board.

[0032] As an optional technical solution, the second extension section of the reflective layer is combined with the bottom of the top plate.

[0033] As an optional technical solution, each of the light-emitting elements is located between the corresponding sensing area of ​​the circuit board and the light-leaking edge of the spacer.

[0034] As an optional technical solution, the spacer has two opposite long sides in the short axis direction, and each of the long sides extends along the long axis direction, and the long side of the two long sides closer to the multiple light-emitting elements constitutes the light leakage side.

[0035] As an optional technical solution, each of the light guide plates has a receiving portion, and each of the light emitting elements protrudes into the corresponding receiving portion of the light guide plate; each of the light emitting elements has a side emitting surface, and the side emitting surface of each of the light emitting elements faces the wall surface of the receiving portion of the corresponding light guide plate.

[0036] As an optional technical solution, the multiple light emitting areas of the top plate, the multiple light transmitting areas of the light shielding plate, and the multiple sensing areas on the circuit board overlap correspondingly in the stacking axis direction.

[0037] As an optional technical solution, the shading plate includes a transparent substrate and at least one shading layer, the at least one shading layer is disposed on the transparent substrate, and the at least one shading layer overlaps with the plurality of light emitting elements in the stacking axis.

[0038] As an optional technical solution, the transparent substrate of the shading plate is on a side of the plate that is not covered by the at least one shading layer.

[0039] Compared with the prior art, the present invention can block the light of the light-emitting element and avoid light leakage by covering the light leakage edge of the spacer and the side edge of the circuit board through the first extended section of the shading plate, or covering the light leakage edge of the spacer and the side edge of the shading plate through the first extended section of the reflective layer.

[0040] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 FIG. 1 is a three-dimensional schematic diagram of a touch input device according to a first embodiment of the present invention.

[0042] Figure 2 It is a schematic exploded three-dimensional diagram of a touch input device according to a first embodiment of the present invention.

[0043] Figure 3 It is a partial exploded schematic diagram of the touch input device according to the first embodiment of the present invention.

[0044] Figure 4 FIG. 4 is a three-dimensional schematic diagram of the touch input device according to the first embodiment of the present invention from another viewing angle.

[0045] Figure 5 for Figure 1 Schematic cross-sectional view along the 5-5 direction.

[0046] Figure 6 FIG. 4 is a cross-sectional diagram of a touch input device according to a second embodiment of the present invention.

[0047] Figure 7 FIG. 4 is a cross-sectional diagram of a touch input device according to a third embodiment of the present invention.

[0048] Figure 8 It is a partial exploded schematic diagram of a touch input device according to a fourth embodiment of the present invention.

[0049] Fig. 9 FIG. 4 is a cross-sectional diagram of a touch input device according to a fourth embodiment of the present invention. DETAILED DESCRIPTION

[0050] In order to provide a further understanding of the purpose, structure, features, and functions of the present invention, the following detailed description is given in conjunction with the embodiments.

[0051] Please refer to Figures 1 to 5 As shown, Figure 1 is a three-dimensional schematic diagram of a touch input device according to a first embodiment of the present invention; Figure 2 is an exploded three-dimensional schematic diagram of a touch input device according to a first embodiment of the present invention; Figure 3 It is a partial exploded schematic diagram of a touch input device according to a first embodiment of the present invention; Figure 4 is a three-dimensional schematic diagram of the touch input device of the first embodiment of the present invention from another viewing angle; Figure 5 for Figure 1 In this embodiment, the touch input device 1 is long, and for ease of description, a long axis X, a short axis Y, and a stacking axis Z are defined to be perpendicular to each other. The touch input device 1 includes a circuit board 10, a plurality of light emitting elements 22, a spacer 24, a plurality of light guides 34, a light shielding plate 36, and a top plate 50.

[0052] The circuit board 10 has an upper surface 102, a lower surface 104 and a board side 106. In this embodiment, the circuit board 10 has two long sides 10a, 10b and two short sides 10c, 10d. The two long sides 10a, 10b are opposite to each other in the short axis direction Y, and each long side 10a, 10b extends along the long axis direction X; the two short sides 10c, 10d are opposite to each other in the long axis direction X, and each short side 10c, 10d extends along the short axis direction Y. The upper surface 102 has a plurality of sensing areas 12, and the plurality of sensing areas 12 are arranged along the long axis direction X. The plurality of sensing areas 12 are connected to the sensing circuit 14. Each sensing area is used to sense the touch operation of the user to generate a corresponding touch signal. The lower surface 104 is provided with a reading element 18 and a light source driving element 20. The reading element 18 is electrically connected to the plurality of sensing areas 12 through the sensing circuit 14 to obtain the touch signal generated by each sensing area 12.

[0053] A plurality of light-emitting elements 22 are disposed on the upper surface 102 of the circuit board 10 and arranged along the long axis X. The plurality of light-emitting elements 22 are electrically connected to the light source driving element 20 through the light source circuit 16 on the upper surface 102 of the circuit board 10. The light source driving element 20 drives each light-emitting element 22 to emit light through the light source circuit 16. In this embodiment, in the short axis Y, each light-emitting element 22 is located on one side of each sensing area 12. Each light-emitting element 22 is a light-emitting diode as an example and has a side light-emitting surface 222. Each side light-emitting surface 222 faces each sensing area 12 in the short axis. In more detail, each light-emitting element 22 is located between each sensing area 12 of the circuit board 10 and one of the long sides 10b, and the other long side 10a is farther from the plurality of light-emitting elements 22. The long side 10b closer to the plurality of light-emitting elements 22 of the two long sides 10a and 10b of the circuit board 10 constitutes (or participates in constituting) the aforementioned board side 106. In one embodiment, the plurality of light emitting elements 22 correspond to the plurality of sensing regions 22 one by one, so that each light emitting element 22 is located at one side of the corresponding sensing region 12 , and its side light emitting surface 222 faces the corresponding sensing region 12 along the minor axis Y.

[0054] In this embodiment, the touch input device 1 may optionally include a reflective layer 60, and the reflective layer 60 is disposed on the upper surface 102 of the circuit board 10. In one embodiment, the reflective layer 60 is disposed on the upper surface 102 of the circuit board 10 along the stacking axial direction Z. The reflective layer 60 is taken as a reflective plate and is disposed on the upper surface 102 of the circuit board 10 by gluing, but is not limited thereto. It may also be a reflective coating, and the reflective coating is coated on the upper surface 102 of the circuit board 10. The reflective layer 60 has a plurality of openings 602 and a plurality of through holes 604. The plurality of openings 602 are arranged along the long axis direction X and correspond to a plurality of sensing areas 12 of the circuit board 10, respectively. Each sensing area 12 is located in the range of each opening 602 on the stacking axial direction Z. In one embodiment, the plurality of openings 602 may correspond to the plurality of sensing areas 12 one by one. The plurality of through holes 604 are arranged along the long axis direction X and the plurality of light emitting elements 22 pass through the plurality of through holes 604, respectively. In one embodiment, the plurality of through holes 604 may correspond to the plurality of light emitting elements 22 one by one. The reflective layer 60 has an upper reflective surface 60a, which faces away from the circuit board 10. In one embodiment, the reflective layer 60 may not be provided with the aforementioned plurality of openings 602, so that the plurality of sensing areas 12 of the circuit board 10 are covered by the reflective layer 60. Each sensing area 12 may also sense the user's touch operation.

[0055] The spacer 24 is disposed above the upper surface 102 of the circuit board 10 along the stacking axial direction Z, and the spacer 24 has a top surface 242, a bottom surface 244, and a light leakage edge. In this embodiment, the spacer 24 is disposed on the reflective layer 60 along the stacking axial direction Z, for example, by gluing on the upper reflective surface 60a of the reflective layer 60, so that the reflective layer 60 is disposed between the upper surface of the circuit board 10 and the bottom surface 244 of the spacer 24. The spacer 24 has a plurality of accommodating holes 26, and the plurality of accommodating holes 26 penetrate the top surface 242 and the bottom surface 244. The plurality of accommodating holes 26 are arranged along the long axis direction X and correspond to the plurality of openings 602 and the plurality of through holes 604 of the reflective layer 60, and the plurality of sensing areas 12 of the circuit board 10, respectively. A spacer rib 28 is formed between two adjacent accommodating holes 26, that is, each spacer rib 28 separates two adjacent accommodating holes 26.

[0056] In this embodiment, the spacer 24 has a first spacing section 30 and a second spacing section 32 in the short axis direction Y. The first spacing section 30 has a plurality of accommodating holes 26. The plurality of light-emitting elements 22 protrude into the plurality of accommodating holes 26 respectively. In the short axis direction Y, the length of the first spacing section 30 is greater than the length of the second spacing section 32. The spacer 24 has two opposite long sides 24a and 24b in the short axis direction Y. Each long side 24a and 24b extends along the long axis direction X. One of the long sides 24a is located in the first spacing section 30, and the other long side 24b is located in the second spacing section 32. The long side 24b closer to the plurality of light-emitting elements 22 (i.e., the long side 24b of the second spacing section) of the two long sides 24a and 24b constitutes (or participates in constituting) a light leakage edge 246. The light leakage edge 246 of the spacer 24 corresponds to the board side edge 106 of the circuit board 10, and in the stacking axis direction Z, the light leakage edge 246 is located above the board side edge 106 of the circuit board 10.

[0057] In this embodiment, each opening 602 of the reflective layer 60 and each through hole 604 are located in the range of each receiving hole 26 in the stacking axial direction Z. In one embodiment, the reflective layer 60 may not be provided, and the spacer 24 may be directly provided on the circuit board 10, and the bottom surface 244 of the spacer 24 directly faces the upper surface 102 of the circuit board 10.

[0058] A plurality of light guides 34 are respectively disposed in a plurality of receiving holes 26 of the spacer 24, and the side light emitting surface 222 of each light emitting element 22 faces each light guide 34. Each light guide 34 has a receiving portion. In the present embodiment, each receiving portion is exemplified by a notch 342, but is not limited thereto and may also be a structure such as a groove or a perforation. Each notch 342 is formed by being recessed from one side edge of each light guide 34. Each light emitting element 22 protrudes into the notch 342 of each light guide 34. Each notch 342 surrounds the side light emitting surface 222 of each light emitting element 22, and the side light emitting surface 222 of each light emitting element 22 faces the wall surface of the notch 342 of each light guide 34. The notch 342 has a long light-entering edge 342a and two short light-entering edges 342b. The long light-entering edge 342a faces the side light-emitting surface 222 of the light-emitting element 22 on the short axis Y, and the two short light-entering edges 342b are located on opposite sides of the side light-emitting surface 222 of the light-emitting element 22 on the long axis X. Thus, the light emitted from the side light-emitting surface 222 of the light-emitting element 22 can mainly enter the light guide plate 34 from the long light-entering edge 342a; the light emitted from the side light-emitting surface 222 to both sides can enter the light guide plate 34 from the two short light-entering edges 342b, thereby increasing the amount of light entering the light guide plate 34.

[0059] In one embodiment, each light emitting element 22 may be located on one side of the light guide plate 34 , and each light guide plate 34 may not be provided with a receiving portion, so that the light emitted from the side light emitting surface 222 of each light emitting element 22 enters the light guide plate 34 from the side of each light guide plate 34 .

[0060] The light shielding plate 36 includes a main plate segment 38, a first extension segment 40, and a second extension segment 42. The main plate segment 38 covers the top surface 242 of the spacer 24, and is set on the top surface 242 of the spacer 24 by gluing, for example. The main plate segment 38 restricts the plurality of light guide sheets 34 in the plurality of receiving holes 26 of the spacer 24. The main plate segment 38 has a plurality of light-transmitting areas 382, ​​which are arranged along the long axis X, and the plurality of light-transmitting areas 382 correspond to the plurality of light guide sheets 34 respectively. Each light guide sheet 34 is located below each light-transmitting area 382 in the stacking axis Z.

[0061] The first extension section 40 covers the light leakage edge 246 of the spacer 24 and the side edge of the circuit board 10, and the second extension section 42 is connected to the first extension section 40 and combined with the lower surface 104 of the circuit board 10, for example, the second extension section 42 is combined with the lower surface 104 of the circuit board 10 by gluing. The first extension section 40 can be combined with the light leakage edge 246 of the spacer 24 and the side edge 106 of the circuit board by gluing. In another embodiment, the first extension section 40 may not be combined with the light leakage edge 246 of the spacer 24 and the side edge 106 of the circuit board 10. In more detail, the first extension section 40 is connected to the side of the main board section 38 close to the light leakage edge 246 of the spacer 24, and the first extension section 40 extends downward along the stacking axis Z and further covers the edge of the reflective layer 60. The second extension section 42 extends along the minor axis direction Y and at least extends to the lower surface 104 of the circuit board 10 and is located directly below the second spacing section 32 of the spacing member 24 to prevent the second extension section 42 from tilting relative to the lower surface 104 of the circuit board 10. In this embodiment, the end of the second extension section 42 extends to below the hole wall 26a of the accommodating hole 26 along the minor axis direction Y, and does not extend to directly below the light emitting element 22.

[0062] In this embodiment, the light shielding plate 36 includes a transparent substrate 44 and at least one light shielding layer. The at least one light shielding layer is disposed on the transparent substrate 44. The at least one light shielding layer overlaps with the plurality of light emitting elements 22 in the stacking axis Z. In this embodiment, the at least one light shielding layer is two layers, which are a reflective layer 46 and a light absorbing layer 48. The inner surface 442 of the transparent substrate 44 is provided for combining the light shielding plate 36 and the circuit board 10. The reflective layer 46 can be, for example, white paint applied to the outer surface 444 of the transparent substrate 44. The light absorbing layer 48 can be, for example, black paint applied to the outer side of the reflective layer 46, and the edges of the reflective layer 46 are all covered by the light absorbing layer 48. On the main board section 38, the light absorbing layer 48 has a plurality of hollow areas 482. Each hollow area 482 and the transparent substrate 44 located thereunder constitute each light-transmitting area 382. In one embodiment, the at least one light shielding layer can be a single layer, for example, only the reflective layer 46 or the light absorbing layer 48 is provided.

[0063] The top plate 50 is disposed on the main board section of the shading plate 36, and the top plate 50 has a plurality of light emitting areas 502, each of which can be, for example, a character. The plurality of light emitting areas 502 are arranged along the long axis X and correspond to the light-transmitting areas 382 of the main board section 38 of the shading plate 36 respectively. Each light emitting area 502 of the top plate 50, each light-transmitting area 382 of the main board section 38 of the shading plate 36 and each sensing area 12 on the circuit board 10 overlap in the stack axis Z. In this embodiment, the top plate 50 includes a transparent plate body 52 and a bottom layer 54, and the transparent plate body 52 can be, for example, a glass plate, and the front of the transparent plate body 52 is an operating surface 522, and the operating surface 522 is for the user to touch, and the bottom layer 54 can be, for example, a primer with a light-shielding effect printed on the back of the transparent plate body 52, thereby printing the shape of each light-transmitting area 382. The bottom layer 54 can be, for example, set on the main board section 38 of the shading plate 36 in an adhesive manner. The top plate 50 has a plate edge 504 , which extends along the long axis direction X and is adjacent to the first extending section 40 of the light shielding plate 36 .

[0064] The light emitted by each light-emitting element 22 enters each light guide plate 34, and then passes through each light-transmitting area 382 of the light-shielding plate 36 and each light-emitting area 502 of the top plate 50 to pass through the operation surface 522. The user can touch the position corresponding to any light-emitting area 502 on the operation surface 522 of the top plate 50, and the sensing area 12 of the circuit board 10 below the touched light-emitting area 502 can sense the user's touch operation. Since the light-leaking edge 246 of the spacer 24 is covered by the first extension section 40 of the light-shielding plate 36, light leakage can be prevented. The user will not see the light passing through the edge 504 of the top plate 50. In addition, since each light guide plate 34 is located in each receiving hole 26 of the spacer 24, adjacent receiving holes 26 are isolated by the spacing ribs 28 of the spacer 24. Therefore, the light transmitted through the light guide plate 34 in each receiving hole 26 will not enter the adjacent receiving hole 26 and affect the light transmitted through the adjacent light output area 502.

[0065] Figure 6 The second embodiment of the touch input device 2 of the present invention is shown, which has a structure substantially the same as that of the first embodiment, except that the second extension section 42 of the light shielding plate 36 extends to the lower surface 104 of the circuit board 10 and is located directly below the plurality of light emitting elements 22. Compared with the first embodiment, the second extension section 42 of the present embodiment has a larger bonding area with the lower surface 104 of the circuit board 10, and the chance of the second extension section 42 being lifted relative to the lower surface 104 of the circuit board 10 can be reduced.

[0066] Figure 7The third embodiment of the touch input device 3 of the present invention is shown, which has a structure substantially the same as that of the second embodiment, except that the second extension section 42 of the light shielding plate 36 extends to the lower surface of the circuit board 10 and is located directly below the plurality of sensing areas 12. The second extension section 42 of this embodiment has a larger bonding area with the lower surface 104 of the circuit board 10, so the bonding strength is stronger, and the second extension section 42 is less likely to warp relative to the lower surface 104 of the circuit board 10.

[0067] In addition, the second extension section 42 of the light shielding plate 36 of this embodiment can be selectively provided with a plurality of heat dissipation holes 422, which are arranged along the long axis X and are respectively located directly below the plurality of light emitting elements 22. Thus, the heat dissipated by each light emitting element 22 can be conducted to the circuit board 10 and discharged through each heat dissipation hole 422.

[0068] Figure 8 and Fig. 9 The fourth embodiment of the touch input device 4 of the present invention is shown, which has a structure substantially the same as that of the first embodiment, except that:

[0069] The reflective layer 60 of the present embodiment includes a main reflective section 62, a first extension section 64 and a second extension section 66. The main reflective section 62 is disposed on the upper surface 102 of the circuit board 10. The main reflective section 62 has a plurality of openings 602 and a plurality of through holes 604. The first extension section 64 is connected to the main reflective section 62. The first extension section 64 extends upward along the stacking axis Z. The second extension section 66 of the reflective layer 60 is connected to the first extension section 64 and is combined with the top plate 50. In more detail, the second extension section 66 is combined with the bottom of the top plate 50, for example, by gluing to the bottom layer 54 of the top plate 50. In one embodiment, the main reflective section 62 may not be provided with a plurality of openings 602.

[0070] The spacer 24 is disposed on the main reflective section 62 of the reflective layer 60, for example, by gluing it on the upper reflective surface 60a of the main reflective section 62. Each light emitting element 22 is located between each sensing area 12 of the circuit board 10 and the light leakage edge 246 of the spacer 24 along the short axis Y.

[0071] The light shielding plate 36 is composed of a main plate segment 38, and the first extension segment 40 and the second extension segment 42 as in the first embodiment are not provided. The light shielding plate 36 has a plate side edge 36a, and the plate side edge 36a corresponds to the light leakage edge 246 of the spacer 24, that is, the plate side edge 36a is located above the light leakage edge 246 in the stacking axial direction Z. In this embodiment, the transparent substrate 44 is not covered by the light absorption layer 48 at the plate side edge 36a. The first extension segment 64 of the reflective layer 60 covers the light leakage edge 246 of the spacer 24 and the plate side edge 36a of the light shielding plate 36.

[0072] Since the light leakage edge 246 of the spacer 24 and the plate side edge 36a of the light shielding plate 36 are covered by the first extension section 64 of the reflective layer 60, light leakage can be prevented. The user will not see the light transmitted from the plate edge 504 of the top plate 50. It is worth mentioning that since the transparent substrate 44 of the light shielding plate is not covered by the light absorption layer 48 at the plate side edge 36a, the first extension section 64 of the reflective layer 60 will further reflect the light transmitted from the transparent substrate 44 at the plate side edge 36a back to each light guide plate 34, thereby increasing the amount of light entering each light guide plate 34, and further increasing the brightness of the light transmitted from the light exit area 502 of the top plate 50.

[0073] In summary, the present invention can block the light of the light-emitting element and avoid light leakage by covering the light leakage edge of the spacer and the side edge of the circuit board through the first extension section of the shading plate, or by covering the light leakage edge of the spacer and the side edge of the shading plate through the first extension section of the reflective layer.

[0074] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field may make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A touch input device, characterized in that: The touch input device comprises: A circuit board, the circuit board having an upper surface, a lower surface and a side edge of the board, the upper surface having a plurality of sensing areas, the plurality of sensing areas being arranged along a long axis; A plurality of light emitting elements, the plurality of light emitting elements are disposed on the upper surface of the circuit board and arranged along the long axis; A spacer, the spacer is disposed above the upper surface of the circuit board, the spacer has a top surface, a bottom surface and a light leakage edge, and the spacer has a plurality of accommodating holes, the plurality of accommodating holes penetrate the top surface and the bottom surface, the plurality of accommodating holes are arranged along the long axis and respectively correspond to the plurality of sensing areas, and the light leakage edge corresponds to the side edge of the circuit board; wherein the plurality of light-emitting elements protrude into the plurality of accommodating holes respectively; A plurality of light guide sheets, the plurality of light guide sheets are respectively disposed in the plurality of receiving holes of the spacer; a light shielding plate, the light shielding plate comprising a main board section, a first extension section and a second extension section, the main board section covers the top surface of the spacer, the main board section has a plurality of light-transmitting areas, the plurality of light-transmitting areas are arranged along the long axis, and the plurality of light-transmitting areas respectively correspond to the plurality of light guide plates; the first extension section covers the light-leaking edge of the spacer and the side edge of the circuit board; the second extension section is connected to the first extension section and combined with the lower surface of the circuit board; and A top plate is arranged on the main board section of the shading plate, and the top plate has a plurality of light emitting areas, which are arranged along the long axis and respectively correspond to the plurality of light-transmitting areas of the main board section.

2. The touch input device according to claim 1, wherein: Each of the light emitting elements is located between the corresponding sensing area of ​​the circuit board and the side edge of the board.

3. The touch input device according to claim 2, wherein: The circuit board has two opposite long sides in the short axis direction, and each of the long sides extends along the long axis direction. The long side closer to the plurality of light emitting elements among the two long sides constitutes the board side.

4. The touch input device according to claim 3, wherein: The spacer has a first spacer section and a second spacer section in the short axis direction, the first spacer section has the multiple accommodating holes, and the second spacer section has the light leakage edge; the second extension section of the shading plate extends at least to the lower surface of the circuit board and is located directly below the second spacer section.

5. The touch input device according to claim 4, wherein: The second extension section of the shading plate extends to the lower surface of the circuit board and is located directly below the plurality of light emitting elements, or the second extension section of the shading plate extends to the lower surface of the circuit board and is located directly below the plurality of sensing areas.

6. The touch input device according to claim 5, wherein: The second extension section of the light shielding plate extends to directly below the plurality of sensing areas. The second extension section of the light shielding plate has a plurality of heat dissipation holes, which are arranged along the long axis and are respectively located directly below the plurality of light emitting elements.

7. The touch input device according to claim 2, wherein: Each of the light guides has a receiving portion, and each of the light emitting elements protrudes into the corresponding receiving portion of the light guide; each of the light emitting elements has a side emitting surface, and the side emitting surface of each of the light emitting elements faces the wall surface of the corresponding receiving portion of the light guide.

8. The touch input device according to claim 1, wherein: The touch input device further comprises a reflective layer, which is arranged between the upper surface of the circuit board and the bottom surface of the spacer. The reflective layer has a plurality of through holes, which are arranged along the long axis and through which the plurality of light-emitting elements pass respectively.

9. The touch input device as claimed in claim 8, characterized in that: The reflective layer has a plurality of openings, which are arranged along the long axis and respectively correspond to the plurality of accommodating holes and the plurality of sensing areas of the circuit board.

10. The touch input device according to claim 1, wherein: Each of the light emitting areas of the top plate, each of the light transmitting areas of the main board segment of the light shielding plate, and each of the sensing areas on the circuit board overlap in the stacking axial direction.

11. The touch input device according to claim 10, wherein: The light shielding plate comprises a transparent substrate and at least one light shielding layer. The at least one light shielding layer is arranged on the transparent substrate. The at least one light shielding layer overlaps with the plurality of light emitting elements in the stacking axis direction.

12. A touch input device, characterized in that: The touch input device comprises: A circuit board, the circuit board having an upper surface and a lower surface, the upper surface having a plurality of sensing areas, the plurality of sensing areas being arranged along a long axis; A plurality of light emitting elements, the plurality of light emitting elements are disposed on the upper surface of the circuit board and arranged along the long axis; a reflective layer, the reflective layer comprising a main reflective section, a first extension section and a second extension section, wherein the main reflective section is disposed on the upper surface of the circuit board, the main reflective section has a plurality of through holes, the plurality of through holes are arranged along the long axis and the plurality of light emitting elements pass through the plurality of through holes respectively; A spacer, the spacer is disposed on the main reflection section of the reflection layer, the spacer has a top surface, a bottom surface and a light leakage edge, and the spacer has a plurality of accommodating holes, the plurality of accommodating holes penetrate the top surface and the bottom surface, the plurality of accommodating holes are arranged along the long axis and respectively correspond to the plurality of sensing areas and the plurality of through holes, wherein the plurality of light-emitting elements protrude into the plurality of accommodating holes respectively; A plurality of light guide sheets, the plurality of light guide sheets are respectively disposed in the plurality of receiving holes of the spacer; a light shielding plate, the light shielding plate covering the top surface of the spacer, the light shielding plate having a plate side edge and a plurality of light-transmitting areas, the plate side edge corresponding to the light-leaking edge of the spacer, the plurality of light-transmitting areas arranged along the long axis, and the plurality of light-transmitting areas respectively corresponding to the plurality of light guide sheets; and A top plate, the top plate is arranged on the shading plate, the top plate has a plurality of light emitting areas, the plurality of light emitting areas are arranged along the long axis and respectively correspond to the plurality of light transmission areas of the shading plate; The first extension section of the reflective layer covers the light leakage edge of the spacer and the plate side edge of the light shielding plate; the second extension section of the reflective layer is connected to the first extension section and combined with the top plate.

13. The touch input device according to claim 12, wherein: The main reflection section has a plurality of openings, which are arranged along the long axis and respectively correspond to the plurality of accommodating holes and the plurality of sensing areas of the circuit board.

14. The touch input device according to claim 12, wherein: The second extension section of the reflective layer is combined with the bottom of the top plate.

15. The touch input device according to claim 12, wherein: Each of the light emitting elements is located between the corresponding sensing area of ​​the circuit board and the light leakage edge of the spacer.

16. The touch input device according to claim 15, wherein: The spacer has two opposite long sides in the short axis direction, and each of the long sides extends along the long axis direction. The long side of the two long sides closer to the plurality of light emitting elements constitutes the light leakage side.

17. The touch input device according to claim 15, wherein: Each of the light guides has a receiving portion, and each of the light emitting elements protrudes into the corresponding receiving portion of the light guide; each of the light emitting elements has a side emitting surface, and the side emitting surface of each of the light emitting elements faces the wall surface of the corresponding receiving portion of the light guide.

18. The touch input device according to claim 12, wherein: The plurality of light emitting areas of the top plate, the plurality of light transmitting areas of the light shielding plate and the plurality of sensing areas on the circuit board overlap correspondingly in the stacking axial direction.

19. The touch input device according to claim 18, wherein: The light shielding plate comprises a transparent substrate and at least one light shielding layer. The at least one light shielding layer is arranged on the transparent substrate. The at least one light shielding layer overlaps with the plurality of light emitting elements in the stacking axis direction.

20. The touch input device according to claim 19, wherein: The transparent substrate of the shading plate is at a side of the plate that is not covered by the at least one shading layer.

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