TWI446227B - Lighting pen and optical drafting device - Google Patents

Description

Luminous pen and optical drawing device

The invention relates to a luminescent pen, in particular to a luminescent pen and an optical drawing device which emit different brightness according to different pressures.

The illuminating pen generally comprises a pen holder, an illuminant disposed in the stylus and a power source, and the power source provides electrical energy to illuminate the illuminant. When the power source is in operation, it provides a steady current to the illuminator, so that the illuminator emits light of stable intensity regardless of whether the pressure applied by the illuminating pen changes.

In order to cause the illuminants to emit light of different brightness, it is necessary to add a current or voltage regulating circuit between the power source and the illuminator so that the current or voltage input or applied to the illuminant can be adjusted to emit light of different brightness. The structure of the luminescent pen structure is more complicated.

In view of the above, it is necessary to provide a luminescent pen and an optical drawing device that emit different brightness according to different pressures and have a simple structure.

A luminescent pen comprising a pen head, an illuminant, a magnet, a Hall element, and a spring, the magnet being coupled to the pen tip and moving under the push of the pen tip, the Hall element being fixed to the magnet A corresponding Hall potential is generated within the magnetic field and according to a change in the magnetic field, the illuminant is illuminated by the driving of the Hall element, the spring being used to connect the magnet to the Hall element.

An optical drawing device comprising a drawing board, at least two infrared cameras and a luminescent pen, a luminescent pen comprising a pen head, an illuminant, a magnet, a Hall element and a spring, the magnet being connected to the pen tip and at the pen tip Pushing the lower movement, the Hall element is fixed in the magnetic field generated by the magnet and generates a corresponding Hall potential according to the change of the magnetic field, the illuminant emitting light under the driving of the Hall element, A spring is used to connect the magnet to the Hall element, the illuminating pen is used to write on the drawing board, and the at least two infrared cameras are arranged around the drawing board to sense a trajectory of the illuminating pen.

Compared with the prior art, the tip of the luminescent pen of the embodiment of the present invention pushes the magnet to move toward the Hall element under different pressures, thereby changing the magnetic field strength of the Hall element to generate a Hall potential, and the magnet and the Hall element. The difference in the distance between the Halls makes the Hall potential different, so the illuminating intensity of the illuminator is also different. Because the distance between the magnet and the Hall element is related to the pressure applied to the tip, the illuminator can emit light of different brightness according to different pressures; since the Hall potential generated by the Hall element is related to the magnetic field. There is no need to increase the current or voltage regulation circuit, and therefore, the structure of the luminescent pen is simple.

10‧‧‧Lighting pen

11‧‧‧ pen

12‧‧‧ pen head

13‧‧‧ magnet

14‧‧‧ Spring

15‧‧‧ Hall element

16‧‧‧Processing unit

17‧‧‧Lights

110‧‧ ‧ baffle

111‧‧‧Part 1

112‧‧‧Part II

113‧‧‧ round holes

20‧‧‧Optical drawing device

21‧‧‧Infrared camera

22‧‧‧ drawing board

1 is a schematic view of a luminescent pen according to an embodiment of the present invention.

Figure 2 is a schematic view of the illuminating pen of Figure 1 under pressure.

FIG. 3 is a schematic diagram of an optical drawing device provided by an embodiment of the present invention.

The invention will now be described in further detail with reference to the accompanying drawings.

As shown in FIG. 1 and FIG. 2, the illuminating pen 10 of the embodiment of the present invention includes a pen holder 11 and a pen tip 12, The magnet 13, the spring 14, the Hall element 15, the processing unit 16, and the illuminator 17.

The pen holder 11 can have various shapes, and in this embodiment, it has a hollow cylindrical structure. A bezel 110 is disposed inside the pen holder 11 to divide the pen holder 11 into a first portion 111 and a second portion 112.

The pen tip 12, the magnet 13, the spring 14, and the Hall element 15 are located in the first portion 111. The Hall element 15 is fixed on the baffle 110 and located in the magnetic field generated by the magnet 13; the illuminant 17 is located in the second portion 112, which can It is an incandescent lamp, an electroluminescent organism or a light-emitting diode. The material of the sheath 11 is entirely a light transmissive material or a part of the rod material around the illuminator 17 is a light transmissive material.

The first portion 111 has a circular hole 113 through which one end of the pen tip 12 protrudes through the circular hole 113. The magnet 13 is fixed to the pen tip 12, and the magnet 13 is moved into the pen holder 11 under the push of the pen tip 12 when the pen tip 12 is pressed into the pen holder 11. Both ends of the spring 14 are respectively connected to the magnet 13 and the Hall element 15. When the magnet 13 moves into the sheath 11, the spring 14 is compressed, and therefore, the distance between the Hall element 15 and the magnet 13 changes, Hall The magnetic field strength at the position where the element 15 is located changes, the Hall element 15 generates a Hall potential, and the processing unit 16 converts the Hall potential into a current input to the illuminator 17 to emit light.

When the pressure applied to the pen tip 12 is different, the distance moved into the pen tip 11 is different, so that the degree of compression of the spring 14 is different, so that the distance between the Hall element 15 and the magnet 13 is also different, then the Hall element The intensity of the magnetic field at 15 is different, and the generated Hall potentials are different. The processing unit 16 converts the Hall potential into different illuminants, and then the illuminant 17 is driven by different currents. different.

In short, the distance between the Hall element 15 and the magnet 13 is increased, and the luminous intensity of the illuminant 17 is decreased; conversely, the illuminating intensity is increased. Since the distance between the Hall element 15 and the magnet 13 is related to the pressure received by the pen tip 12, the pressure is large and the pressure is small, so that the pressure of the pen tip 12 can be judged according to the luminous intensity of the illuminator 17. Alternatively, the illuminant 17 can emit light of different brightness according to different pressures.

Referring to FIG. 3, the optical drawing device 20 of the embodiment of the present invention includes two infrared imaging devices 21, a drawing board 22, and a luminescent pen 10.

The drawing board 22 has a square structure, and the infrared imaging device 21 is located at two corners adjacent to the drawing board 22. The illuminating pen 10 is used for writing on the drawing board 22, and the infrared imaging device 21 can take a writing trajectory of the illuminating pen 10.

The thickness of the handwriting is set to be related to the luminous intensity of the illuminating pen 10, that is, the luminous intensity is large and the handwriting is thick, and conversely, the handwriting is thin. When writing on the drawing board 22 with a large pressure, the writing head 12 moves into the inside of the pen 11 under the pressure so that the distance between the magnet 13 and the Hall element 15 is reduced, and the luminous intensity of the luminous body 17 is increased. The infrared imaging device 21 senses the change, and then corresponds the intensity of the illumination to the thickness of the writing track, so that the thickness of the handwriting can be judged.

In addition, those skilled in the art can make other changes in the spirit of the present invention. Of course, the changes made in accordance with the spirit of the present invention should be included in the scope of the present invention.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Anyone who is familiar with the skill of this case is assisted by the present invention. Equivalent modifications or variations made by the spirit are to be covered by the following patents.

10‧‧‧Lighting pen

11‧‧‧ pen

12‧‧‧ pen head

13‧‧‧ magnet

14‧‧‧ Spring

15‧‧‧ Hall element

16‧‧‧Processing unit

17‧‧‧Lights

110‧‧ ‧ baffle

111‧‧‧Part 1

112‧‧‧Part II

113‧‧‧ round holes

Claims (5)

A illuminating pen comprising a pen holder, a pen tip and an illuminant, wherein the pen holder is provided with a baffle, and the pen bar is divided into a first part and a second part, the illuminating pen further comprising a magnet and a Hall element a processing unit and a spring, the pen head, the magnet, the Hall element and the spring being located in the first portion, the magnet being connected to the pen tip and moving under the push of the pen tip, the Hall element being fixed in the a baffle and located in a magnetic field generated by the magnet and generating a corresponding Hall potential according to a change of a magnetic field, the spring is used to connect the magnet and the Hall element, the processing unit and the illuminating The body is located in the second portion, and the processing unit is configured to convert a Hall potential generated by the Hall element into a current input to the illuminant to drive the illuminant to emit light. The illuminating pen according to claim 1, wherein the pen tip is movably disposed in the pen holder and one end protrudes from the pen holder. The illuminating pen according to claim 2, wherein: one end of the pen holder has a circular hole for the pen tip to protrude. The illuminating pen according to any one of claims 1 to 3, wherein the illuminant is an incandescent lamp, an electroluminescent organism or a light-emitting diode. An optical drawing device comprising a drawing board, at least two infrared cameras, and a luminescent pen according to claim 4, wherein the illuminating pen is used for writing on the drawing board, and the at least two infrared cameras surround The tablet is configured to sense a trajectory of the illuminating pen.