CN103144467A - Automatic illuminating pen - Google Patents
Automatic illuminating pen Download PDFInfo
- Publication number
- CN103144467A CN103144467A CN201310116921XA CN201310116921A CN103144467A CN 103144467 A CN103144467 A CN 103144467A CN 201310116921X A CN201310116921X A CN 201310116921XA CN 201310116921 A CN201310116921 A CN 201310116921A CN 103144467 A CN103144467 A CN 103144467A
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- China
- Prior art keywords
- pen
- automatic illuminating
- handwriting
- emitting diode
- light emitting
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The invention discloses an automatic illuminating pen which comprises a pen body, wherein high polymer piezoelectric material polyvinyl fluoride is adhered on the outer part of the pen body, the lower end of the pen body is connected with a light emitting diode, the lower end of the light emitting diode is connected with a pen point, and a charge amplifier is arranged in the lower part of the pen body. According to the automatic illuminating pen, the difficulty in writing under the condition of no light or weak light is solved, the illuminating condition can be improved without an external power supply, and thus the automatic illuminating pen is more convenient to use, resources are more effectively utilized, and the cost is saved.
Description
Technical field
The present invention relates to a kind of pen, what be specifically related to is a kind of automatic illuminating pen that utilizes the high polymer piezoelectric material power supply.
Background technology
In actual life, commonly used pen only just can write preferably the time at light, in the situation that night is weak without light or light, can't well fulfil assignment.Thus, give some particular surroundings, as field work etc., band is served inconvenience.If but improve illumination by external power supply, and not high to efficient utilization of resource yet, easily cause the wasting of resources.
Summary of the invention
The object of the invention is to overcome the above problem that prior art exists, a kind of automatic illuminating pen is provided, use more conveniently, more can improve efficient utilization of resource.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the present invention is achieved through the following technical solutions:
a kind of automatic illuminating pen, comprise handwriting, the paste outside high polymer piezoelectric material polyvinyl fluoride (PVF) of described handwriting, the lower end connecting luminous diode of described handwriting, described light emitting diode lower end connects nib, under described handwriting, part is in-built a charge amplifier, hold described handwriting during use, can apply power to described handwriting inner macromolecule piezoelectric, due to piezo-electric effect, high polymer piezoelectric material converts pressure to electric charge, the charge conversion of by described charge amplifier, high polymer piezoelectric material being exported again is voltage, light described light emitting diode, thereby better lighting environment is arranged when making described nib write.
The invention has the beneficial effects as follows:
The invention solves without the difficult problem of difficulty of writing in the weak situation of light or light, and need not external power supply and can improve lighting condition, thereby use more conveniently, also improved efficient utilization of resource simultaneously, saved cost.
Description of drawings
Fig. 1 is the overall structure schematic diagram;
Fig. 2 is the light emitting diode construction schematic diagram;
Fig. 3 is schematic diagram;
Fig. 4 is circuit diagram.
Number in the figure explanation: 1, handwriting, 2, charge amplifier, 3, light emitting diode, 4, nib.
The specific embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
with reference to Fig. 1, shown in Figure 2, a kind of automatic illuminating pen, comprise handwriting 1, the paste outside high polymer piezoelectric material polyvinyl fluoride (PVF) of described handwriting 1, the lower end connecting luminous diode 3 of described handwriting 1, described light emitting diode 3 lower ends connect nib 4, 1 time part of described handwriting is in-built charge amplifier 2, hold described handwriting 1 during use, can apply power to described handwriting 1 inner macromolecule piezoelectric, due to piezo-electric effect, high polymer piezoelectric material converts pressure to electric charge, the charge conversion of by described charge amplifier 2, high polymer piezoelectric material being exported again is voltage, light described light emitting diode 3, thereby better lighting environment is arranged when making described written 4 to write.
The operation principle of the present embodiment is as follows:
With reference to Fig. 3, shown in Figure 4, feedback capacity C
fBe connected across between the inverting input and output of described charge amplifier 2.According to the Miller equivalent theorem, be equivalent in the input parallel connection equivalent capacity C that capacity is very large
f'.If the open-loop gain number of operational amplifier is A
u, usually be about 120dB, be equivalent to 10
6C
f(the 1+A of ' '=
u) C
f, C
fSpan mostly be 100pF ~ 0.1 μ F.If C
fGet minimum of a value 100pF, equivalent capacity C
f' be about 100 μ F.The total capacitance of input circuit is basically by C
f＇ determines
C
Always=Ca+Cc+C
i+ (1+A
u) C
f
The output voltage of described charge amplifier 2 is:
In formula
Q: the electric charge virtual value that piezoelectric element is produced by the dynamic force effect;
C
f: be connected in parallel on the feedback capacity between described charge amplifier 2 inputs and output;
When A is enough large, (1+A) C
f(Ca+Cc+C
i), but the following formula abbreviation is
Hence one can see that, and the output voltage of described charge amplifier 2 is only relevant with input charge and feedback capacity.
When the people held described handwriting 1, the power of holding was larger, and high polymer piezoelectric material polyvinyl fluoride (PVF) output charge is more, and described charge amplifier 2 output voltages are higher, and in described light emitting diode 3 voltage allowed bands, described Light-Emitting Diode 3 is brighter.
Claims (1)
1. automatic illuminating pen, it is characterized in that: comprise handwriting (1), the paste outside high polymer piezoelectric material polyvinyl fluoride of described handwriting (1), the lower end connecting luminous diode (3) of described handwriting (1), described light emitting diode (3) lower end connects nib (4), and the lower part of described handwriting (1) is in-built charge amplifier (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310116921XA CN103144467A (en) | 2013-04-07 | 2013-04-07 | Automatic illuminating pen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310116921XA CN103144467A (en) | 2013-04-07 | 2013-04-07 | Automatic illuminating pen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103144467A true CN103144467A (en) | 2013-06-12 |
Family
ID=48542914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310116921XA Pending CN103144467A (en) | 2013-04-07 | 2013-04-07 | Automatic illuminating pen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103144467A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4078226A (en) * | 1977-03-16 | 1978-03-07 | The United States Of America As Represented By The United States Department Of Energy | Input apparatus for dynamic signature verification systems |
| CN201769535U (en) * | 2010-07-06 | 2011-03-23 | 王劭政 | Piezoelectricity pen |
| CN202169805U (en) * | 2011-07-06 | 2012-03-21 | 山东科技大学 | Light-emitting pen |
| CN202293868U (en) * | 2011-09-27 | 2012-07-04 | 山东科技大学 | Novel pen holder |
| CN202598163U (en) * | 2012-04-05 | 2012-12-12 | 冷文辉 | Pen point electricity-generating illuminating device |
-
2013
- 2013-04-07 CN CN201310116921XA patent/CN103144467A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4078226A (en) * | 1977-03-16 | 1978-03-07 | The United States Of America As Represented By The United States Department Of Energy | Input apparatus for dynamic signature verification systems |
| CN201769535U (en) * | 2010-07-06 | 2011-03-23 | 王劭政 | Piezoelectricity pen |
| CN202169805U (en) * | 2011-07-06 | 2012-03-21 | 山东科技大学 | Light-emitting pen |
| CN202293868U (en) * | 2011-09-27 | 2012-07-04 | 山东科技大学 | Novel pen holder |
| CN202598163U (en) * | 2012-04-05 | 2012-12-12 | 冷文辉 | Pen point electricity-generating illuminating device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130612 |