TWI471766B - A light-piercing pen tip element, and a light-sensitive stylus pen for the optical touch device comprising the polished pen tip element - Google Patents

Description

a concentrating pen tip element, and a illuminating stylus for the optical touch device comprising the concentratable pen tip element

The present invention relates to a stylus for a touch device, and more particularly to a luminescent stylus for an optical touch device.

Figure 1 illustrates a conventional stylus as a stylus for an optical touch device (not shown). The conventional stylus includes a pen holder 11, a light transmissive tip body 13, and a light source 12. The light-transmitting tip body 13 is attached to the sheath 11 and has an exposed portion 131 extending out of the sheath 11 in one axial direction of the sheath 11. The light source 12, for example, a light emitting diode (LED), is coaxially mounted into the sheath 11 and disposed adjacent to the tip body 13 such that light emitted by the light source 12 is radiated outward through the exposed portion 131 of the tip body 13. When the pen tip body 13 touches the touch screen 100 of the optical touch device (see FIG. 2), the light emitted from the exposed portion 131 of the pen tip body 13 is received by an optical sensor module of the optical touch device (not shown). Inductively, the optical touch device determines a sensing position (P') on the touch screen 100 related to one of the touch points of the tip body 13, and displays the sensing position on the touch screen 100.

It is to be noted that the exposed portion 131 of the tip body 13 has a length ranging from 5 millimeters (mm) to 6 mm. Therefore, when the pen tip body 13 touches the touch screen 100, the optical touch device will treat a position on the touch screen 100 corresponding to the center point (C) of the exposed portion 131 of the pen tip body 13 (see FIG. 2). Induction position (P').

In use, as shown in FIG. 2, when the traditional stylus touches the touch screen 100 obliquely with the tip body 13, it will be at one position (P) and sensing position of a touch point. A displacement (Δd) is generated between the (P'), wherein the touch point position (P) is the touch point position of the pen tip body 13 on the touch screen 100, and the sensing position (P') is related to the pen tip body 13 The touch point is displayed on the touch screen 100. In this case, the optical touch device can position the touch point of the tip body 13 on the touch screen 100 with reduced accuracy. It is to be noted that the longer the length of the exposed portion 131 of the nib 13 is, the larger the displacement (Δd) is. Therefore, when such a stylus is used with an optical touch device, the optical touch device may not be able to accurately locate the touch point on the touch screen 100.

Accordingly, it is an object of the present invention to provide a concentratable pen tip element and a luminescent stylus for an optical touch device comprising the concentratable pen tip element that overcomes the above-discussed shortcomings of the prior art.

According to one aspect of the present invention, an illuminated stylus for an optical touch device is provided. The illuminating stylus of the present invention comprises a pen holder, a pen tip element and a lighting unit. The pen has an open end. The nib element includes a solid transparent rod and a concentrating unit. The transparent rod extends in an axial direction of the sheath and is detachably mounted to the sheath. The transparent rod has a first rod portion and a second rod portion, wherein the first rod portion is disposed in the rod rod and adjacent to an open end of the rod rod, the second rod portion is connected to the first rod portion and The open end extends beyond the stem. The second stem of the transparent rod has a nib adapted to touch the optical touch device. The concentrating unit includes a first concentrating structure and a second concentrating structure, the first concentrating structure is coaxially formed in the first rod portion of the transparent rod, and the second concentrating structure is formed coaxially Inside the second rod of the transparent rod And protruding toward the first rod portion of the transparent rod and adjacent to the nib of the second rod portion of the transparent rod. The light emitting unit is fixed in the pen holder, radially adjacent to the first rod portion of the transparent rod, and can emit light.

The light emitted by the light emitting unit and traveling into the first rod portion of the transparent rod, wherein a part of the light is reflected or refracted by the first light collecting structure toward the second light collecting structure, so that the second concentrated light is directed toward the second light collecting structure Light reflected or refracted by the structure is reflected or refracted by the second concentrating structure to radiate from the second shank of the transparent rod.

According to another aspect of the present invention, a nib element for a light-emitting stylus is provided. The illuminating stylus includes a stylus having an open end, and a illuminating unit fixed in the stylus adjacent to the open end and capable of emitting light. The nib element of the present invention comprises a solid transparent rod and a concentrating unit. The transparent rod extends in an axial direction of the barrel and is adapted to be detachably mounted to the barrel. The transparent rod has a first rod portion and a second rod portion, wherein the first rod portion is disposed in the rod rod and adjacent to the open end of the rod rod, such that the light emitting unit is radially adjacent to the first rod portion The second stem is coupled to the first stem and extends outside the stem via the open end. The second stem of the transparent rod has a tip. The concentrating unit includes a first concentrating structure and a second concentrating structure, the first concentrating structure is coaxially formed in the first rod portion of the transparent rod, and the second concentrating structure is formed coaxially The second rod portion of the transparent rod protrudes toward the first rod portion of the transparent rod and is disposed adjacent to the nib of the second rod portion of the transparent rod.

Light emitted by the light emitting unit and traveling into the first rod portion of the transparent rod, wherein a portion of the light is directed by the first light collecting structure toward the second light collecting node The light is reflected or refracted such that the light reflected or refracted toward the second light collecting structure is reflected or refracted by the second light collecting structure to be radiated from the second stem portion of the transparent rod.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments of the invention.

Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to FIG. 3, a light-emitting stylus for an optical touch device (not shown) according to a preferred embodiment of the present invention includes a pen holder 2, a pen tip member 3, and a light-emitting unit 4.

The pen holder 2 is made of an opaque material and has an open end 21.

With further reference to FIGS. 4 and 5, the nib element 3 includes a solid transparent rod 31 extending in one axial direction of the sheath 2 and detachably mounted to the sheath 2, and a concentrating unit 32.

In this embodiment, the transparent rod 31 is made of a transparent light guiding material such as acrylic. The transparent rod 31 has a first rod portion 311, a second rod portion 312, and a third rod portion 313. The first rod portion 311 is disposed in the pen holder 2 and adjacent to the open end 21 of the pen holder 2; the second rod portion 312 is connected to the first rod portion 311, extends through the open end 21 to the outside of the pen holder 2, and has a contact The tip 314 of the touch surface 200 (see FIG. 3) of the optical touch device is controlled; the third rod portion 313 is opposite to the second rod portion 312 in the axial direction, is connected to the first rod portion 311, and is smaller than the first rod The portion 311 and the second rod portion 312 are thin. Third rod The portion 313 is tightly inserted into a mounting tube 22 in the sheath 2 (see Fig. 3).

The concentrating unit 32 includes a first concentrating structure 321, a second concentrating structure 322, and a reflective layer 323. The first light collecting structure 321 is coaxially formed in the first rod portion 311 of the transparent rod 31. In this embodiment, the first concentrating structure 321 is in the form of a substantially convex whitening reflection or refraction surface, and the convex whitening reflection or refraction surface is coaxially formed in the first rod portion 311, and the convex surface is whitened. The reflective or refractive surface protrudes toward the second stem portion 312 of the transparent rod 31 and is formed by laser engraving a convex region in the first stem portion 311. In the preferred embodiment, the shape of the convex whitened reflective or refractive surface of the first light collecting structure 321 is hemispherical, but is not limited thereto. The second light collecting structure 322 is coaxially formed in the second rod portion 312 of the transparent rod 31, protrudes toward the first rod portion 311, and is disposed adjacent to the nib 314 of the second rod portion 312. In the preferred embodiment, the second concentrating structure 322 is in the form of a substantially convex whitened reflective or refracting surface that protrudes toward the first shank 311 by means of a laser A convex region in the second rod portion 312 is engraved to be formed. In the preferred embodiment, the shape of the convex whitened reflective or refractive surface is conical, but is not limited thereto. The reflective layer 323 is partially coated onto one outer surface of the first stem portion 311 of the transparent rod 31 such that the annular surface portion 315 of the outer surface of the first stem portion 311 is exposed, so that the first light collecting structure The 321 is visible through the annular surface portion 315 of the outer surface of the first rod portion 311. It is to be noted that the annular surface portion 315 of the outer surface of the first rod portion 311 is polished to efficiently receive light from the outside of the nib element 3.

A light emitting unit 4, such as a light emitting diode (LED), is fixed to the pen holder 2 Inside, and can emit light. The light emitting unit 4 is radially adjacent to the first rod portion 311 and has a position corresponding to the exposed annular surface portion 315 of the outer surface of the first rod portion 311 such that the light emitted by the light emitting unit 4 passes through the first rod portion 311. The exposed annular surface portion 315 of the surface travels to the first stem portion 311. Therefore, the light emitted by the light emitting unit 4, a part of the light is reflected or refracted by the first light collecting structure 321 toward the second light collecting structure 322 or the reflective layer 323, wherein the light emitted by the light emitting unit 4 passes through the first rod portion. The polished annular surface portion 315 of the outer surface of 311 travels to the first stem portion 311. Then, the light reflected or refracted from the first concentrating structure 321 toward the second concentrating structure 322 and the light reflected by the reflective layer 323 toward the second concentrating structure 322 are reflected or refracted by the second concentrating structure 322 so that It is radiated from the second rod portion 312.

Figure 6 illustrates a first variation of the tip element 3', which differs from the tip element 3 of Figure 5 in that the second concentrating structure 322' of the concentrating unit 32' is a piece of metal that is coaxially embedded in the transparency. The second rod portion 312 of the rod 31 has a convex outer reflection surface that protrudes toward the first rod portion 311 of the transparent rod 31. In the preferred embodiment, the shape of the convex outer reflection surface of the second light collecting structure 322' is conical, but not limited thereto.

7 and 8 depict a second variation of the nib element 3", which differs from the nib element 3 of Figures 4 and 5 in that the first concentrating structure 321" of the concentrating unit 32" is an annular whitened reflection or In the form of a refractive surface, the annular whitened reflective or refractive surface is coaxially disposed in the first stem portion 311 of the transparent rod 31 and engraves an annular region in the first stem portion 311 of the transparent stem 31 by laser And formed.

In summary, because the second light collecting structure 322, 322' is adjacent to the nib 314, the light emitted by the light emitting unit 4 is collected by the concentrating unit 3, and then reflected or refracted by the second concentrating structure 322 or 322' to be radiated from the second shank portion 312, thereby forming a brightness very close to the nib 314. Point, which is hardly obscured by the user's fingers during use. Therefore, in use, even if the illuminating stylus touches the touch surface 200 of the optical touch device obliquely with the pen tip 314, the sensing position of the touch surface 200 relative to the touch point of the pen tip 314 is very close to the tip of the touch surface 200. The position of the touch point is determined by the optical touch device according to the light emitted by the second light collecting structure 322. In this case, the optical touch device can more accurately locate the touch point of the nib 13 on the touch surface 200. Therefore, when the illuminating stylus of the present invention is used in combination with an optical touch device, the optical touch device can ensure the accuracy of positioning a touch point.

While the invention has been described with respect to the preferred embodiments and the preferred embodiments, the invention All such modifications and equivalent arrangements are included.

2‧‧‧ pen

21‧‧‧Open end

22‧‧‧Installation tube

3‧‧‧pen element

31‧‧‧ Solid transparent rod

311‧‧‧ first pole

315‧‧‧ annular surface part

312‧‧‧Second pole

314‧‧‧ nib

313‧‧‧ Third Rod

32‧‧‧ concentrating unit

321‧‧‧First concentrating structure

322‧‧‧Second concentrating structure

323‧‧‧reflective layer

4‧‧‧Lighting unit

3'‧‧‧pen element

32’‧‧‧ concentrating unit

322'‧‧‧Second concentrating structure

3"‧‧‧ pen tip components

32”‧‧‧ concentrating unit

321”‧‧‧The first concentrating structure

Other features and advantages of the present invention will become apparent from the Detailed Description of the Drawing.

1 is a schematic view showing a conventional light-emitting stylus; FIG. 2 is a partial schematic view showing a conventional light-emitting stylus when touching a touch screen; FIG. 3 is a partial cross-sectional view showing a use according to the present invention. to A preferred embodiment of an optical stylus of an optical touch device; FIG. 4 is a perspective view showing a pointed component of the preferred embodiment; and FIG. 5 is a schematic cross-sectional view showing the tip component of the preferred embodiment Figure 6 is a schematic cross-sectional view showing a first variation of the nib element of the preferred embodiment; Figure 7 is a perspective view showing a second variation of the nib element of the preferred embodiment; and Figure 8 is a A schematic cross-sectional view showing a second variation of the nib element of the preferred embodiment.

2‧‧‧ pen

31‧‧‧ Solid transparent rod

311‧‧‧ first pole

312‧‧‧Second pole

314‧‧‧ nib

32‧‧‧ concentrating unit

321‧‧‧First concentrating structure

322‧‧‧Second concentrating structure

4‧‧‧Lighting unit

Claims (19)

A light-emitting stylus for an optical touch device, comprising: a pen holder having an open end; a pen tip element comprising: a solid transparent rod extending in an axial direction of the pen holder and detachably mounted To the pen holder, the transparent rod has a first rod portion and a second rod portion, wherein the first rod portion is disposed in the rod rod and adjacent to an open end of the rod rod, and the second rod portion is connected to the first rod portion And extending through the open end to the outside of the pen holder, the second rod portion of the transparent rod has a nib suitable for touching the optical touch device; and a concentrating unit comprising a first concentrating structure and a first a dichroic structure, the first concentrating structure is coaxially formed in the first rod portion of the transparent rod, and the second concentrating structure is coaxially formed in the second rod portion of the transparent rod toward the transparent rod The first rod portion protrudes and is disposed adjacent to the nib of the second rod portion of the transparent rod; and a light emitting unit is fixed in the rod rod, radially adjacent to the first rod portion of the transparent rod, and can emit light; Wherein, the light single Light emitted to the first shank of the transparent rod, a portion of which is reflected or refracted by the first concentrating structure toward the second concentrating structure such that the reflecting or refracting toward the second concentrating structure The light is reflected or refracted by the second concentrating structure to radiate from the second shank of the transparent rod. The illuminating stylus according to claim 1, wherein the illuminating unit is a illuminating diode. The illuminating stylus according to claim 1, wherein the transparent rod of the nib element is made of a transparent light guiding material; and the second concentrating structure of the concentrating unit is a substantially convex white surface. In the form of a reflective or refractive surface, the convex whitened reflective or refractive surface protrudes toward the first stem and is formed by laser engraving a convex region in the second stem of the transparent stem. The illuminating stylus according to claim 3, wherein the shape of the convex whitening reflection or refraction surface of the second concentrating structure of the concentrating unit is conical. The illuminating stylus according to claim 3, wherein the first concentrating structure of the concentrating unit is in the form of an annular whitening reflection or refraction surface, and the annular whitening reflection or refraction surface is coaxially arranged. Formed in the first rod portion of the transparent rod and by engraving an annular region in the first rod portion of the transparent rod. The illuminating stylus according to claim 3, wherein the first concentrating structure of the concentrating unit is in the form of a substantially convex whitening reflecting or refracting surface, the convex whitening reflecting or refracting surface facing the transparent A second stem portion of the stem projects and is formed by laser engraving a convex region of the first stem portion of the transparent stem. The illuminating stylus according to claim 6, wherein the shape of the convex whitening reflection or refraction surface of the first concentrating structure of the concentrating unit is hemispherical. The illuminating stylus according to claim 1, wherein the concentrating unit The second concentrating structure is a metal sheet that is coaxially embedded in the second shank of the transparent rod and has a convex outer reflecting surface that protrudes toward the first shank of the transparent rod. The illuminating stylus according to claim 8, wherein the convex outer reflecting surface of the second concentrating structure of the concentrating unit has a conical shape. The illuminating stylus according to claim 1, wherein the concentrating unit further comprises a reflective layer partially coated on an outer surface of the first shank of the transparent rod to make the transparent An annular surface portion of the outer surface of the first shank of the rod corresponding to the concentrating unit is exposed to allow light emitted by the illuminating unit to pass through an annular surface of the outer surface of the first shank of the transparent rod Partially traveling into the first shank of the transparent rod; and light reflected or refracted by the first concentrating structure travels toward the second concentrating structure or the reflective layer such that the first concentrating structure faces the first Light reflected or refracted by the dichroic structure and light reflected by the reflective layer toward the second concentrating structure are reflected or refracted by the second concentrating structure to be radiated from the second shank of the transparent rod. A pen tip component of a light-emitting stylus, the light-emitting stylus comprising a pen holder and an illumination unit, the pen holder having an open end, the illumination unit being firmly disposed in the pen holder adjacent to the open end, and capable of emitting light, The nib element includes: a solid transparent rod extending in an axial direction of the barrel and adapted to be detachably mounted to the barrel, the transparent rod having a first rod portion and a second rod portion, the first rod portion Department is suitable for setting in the pen Inside the rod and close to the open end of the rod, such that the light unit is radially adjacent to the first rod, the second rod is connected to the first rod and extends outside the rod via the open end, the transparent rod The second rod portion has a pen tip; and a concentrating unit includes a first concentrating structure and a second concentrating structure, the first concentrating structure being coaxially formed in the first rod portion of the transparent rod The second light collecting structure is coaxially formed in the second rod portion of the transparent rod, protrudes toward the first rod portion of the transparent rod, and is disposed adjacent to the nib of the second rod portion of the transparent rod; wherein Light emitted by the light emitting unit and traveling into the first rod portion of the transparent rod, a portion of which is reflected or refracted by the first light collecting structure toward the second light collecting structure, so that the light is reflected toward the second light collecting structure The refracted light is reflected or refracted by the second concentrating structure to radiate from the second shank of the transparent rod. The tip element of claim 11, wherein: the transparent rod is made of a transparent light guide material; and the second light collecting structure of the light collecting unit is in the form of a substantially convex whitened reflective or refractive surface, A convex whitened reflective or refractive surface projects toward the first stem and is formed by laser engraving a convex region in the second stem of the transparent stem. The nib element of claim 12, wherein the convex whitened reflective or refractive surface of the second concentrating structure of the concentrating unit is conical in shape. The tip element of claim 12, wherein the first concentrating structure of the concentrating unit is in the form of a substantially annular whitened reflective or refractive surface, The annular whitened reflective or refractive surface is coaxially disposed within the first stem of the transparent rod and is formed by laser engraving an annular region in the first stem of the transparent stem. The tip element of claim 12, wherein the first concentrating structure of the concentrating unit is in the form of a substantially convex whitened reflective or refractive surface that faces the transparent rod toward the transparent rod The second stem protrudes and is formed by laser engraving a convex area in the first stem of the transparent stem. The nib element of claim 15, wherein the convex whitened reflective or refractive surface of the first concentrating structure of the concentrating unit has a hemispherical shape. The tip element of claim 11, wherein the second concentrating structure of the concentrating unit is a metal piece, the metal piece being coaxially embedded in the second shank of the transparent rod and having a direction toward the A convex outer reflective surface that protrudes from the first stem portion of the transparent rod. The nib element according to claim 17, wherein the convex outer reflection surface of the second concentrating structure of the concentrating unit has a conical shape. The tip element of claim 11, wherein: the concentrating unit further comprises a reflective layer partially coated on an outer surface of the first shank of the transparent rod such that the transparent rod An annular surface portion of the outer surface of the first shank corresponding to the concentrating unit is exposed to allow light emitted by the illuminating unit to travel through the annular surface portion of the outer surface of the first shank of the transparent rod To the first stem of the transparent rod; and The light reflected or refracted by the first concentrating structure travels toward the second concentrating structure or the reflective layer such that light reflected or refracted from the first concentrating structure toward the second concentrating structure, and the reflected Light reflected by the layer toward the second concentrating structure is reflected or refracted by the second concentrating structure to be radiated from the second shank of the transparent rod.