TWM474183U - Light-energy stylus - Google Patents

Abstract

A light-energy stylus with a light guide having a distal end disposed near a tip of a housing and exposed on a surface of the housing. Light enters the light guide from the distal end, travels through the light guide and is then collected at a proximal end of the light guide. A photovoltaic element converts the collected light into electrical energy. Accordingly, in addition to performing touch functions, the light-energy stylus may execute bi-directional data communication with a touch panel.

Description

Light stylus

This creation is about a stylus, especially about a light stylus.

A touch screen can generally be operated with a finger, however, a stylus (or stylus) can achieve a more precise operation without leaving oil on the touch surface.

One of the disadvantages of traditional styluses (especially active styluses) is the need to use a battery or pre-charge. If you use the stylus for a long time or forget to charge it in advance, the stylus will not be usable because it lacks the power required. Although an electromagnetic stylus (generally a passive stylus) can receive the magnetic field waves generated by the touch screen by the induction coil to provide the required power, the magnetic field often affects other electronic devices around, resulting in Electromagnetic interference (EMI) problems, and magnetic field waves can also have adverse effects on the human body.

Therefore, it is urgent to propose a novel stylus to solve the problem of the traditional stylus and make the stylus more convenient to use.

In view of the above, the present embodiment provides a light energy stylus that introduces light from a display module of a touch screen and converts it into electrical energy to provide a required power supply to the circuitry within the light stylus.

According to the present creative embodiment, the light stylus includes a housing, a light guide, and a photoelectric conversion element. The light guide is disposed in the housing, and the end of the light guide is disposed near the tip end of the housing and exposed to the surface of the housing. The light enters the light guide from the end of the light guide and is led out from the proximal end of the light guide through the internal transmission of the light guide. The photoelectric conversion element is disposed in the housing for converting light energy of the light guided by the light guide into electrical energy.

100‧‧‧Light stylus

10‧‧‧shell

11‧‧‧Light Guide

111‧‧‧End of light guide

112‧‧‧The proximal end of the light guide

12‧‧‧Electrical block

121‧‧‧ tip

13‧‧‧ photoelectric conversion components

14‧‧‧Power conditioner

15‧‧‧Power storage components

16‧‧‧Drive circuit

161‧‧‧ processor

162‧‧Amplifier

200‧‧‧ touch screen

21‧‧‧Display module

22‧‧‧Touch panel

221‧‧‧ touch surface

The first figure shows a schematic diagram of the light stylus of the present creative embodiment.

The second figure shows a schematic of the touch screen.

The third figure shows a schematic diagram of a light energy stylus according to another embodiment of the present invention.

The fourth figure shows a block diagram of the driving circuit of the first figure.

The first figure shows a schematic diagram of a stylus (referred to as "light stylus") 100 driven by light energy in the present embodiment. The light stylus 100 of this embodiment can be an active stylus for interacting with a touch screen. The second figure shows a schematic diagram of the touch screen 200, which mainly includes a display module (such as a liquid crystal display module or LCM) 21 and a touch panel (TP) 22, wherein the touch panel 22 is located on the display module 21, and The upper surface of the touch panel 22 serves as the touch surface 221 . In addition, the light generated by the display module 21 passes through the touch panel 22 and is emitted from the touch surface 221 .

In this embodiment, the light stylus 100 includes at least one light guide 11 , which may be a light tube or an optical fiber, disposed in the housing 10 . The distal end of the light guide 11 is disposed adjacent the tip 121 of the housing 10, and a tip (121) is generally provided with a conductive block (e.g., a metal block) 12. As illustrated in the first figure, the end 111 of the light guide 11 is exposed to the surface of the housing 10 and surrounds the conductive block 12. The third figure shows a schematic diagram of a light stylus 100 of another embodiment of the present invention. As illustrated in the third figure, the end 111 of the light guide 11 is exposed to the surface of the housing 10 and substantially coincides with the tip end 121 of the housing 10, and the conductive block 12 surrounds the light guide 11 (in other words, the end 111 of the light guide 11 passes through) The center of the conductive block 12).

When the tip end 121 of the housing 10 approaches or touches the touch surface 221 of the touch screen 200, the light emitted from the touch surface 221 can enter the light guide 11 from the end 111 of the light guide 11, and is transmitted from the light guide through the light guide 11 The proximal end 112 of 11 is derived.

The light stylus pen 100 of the embodiment further includes a photoelectric conversion element 13 disposed in the casing 10. The photoelectric conversion element 13 converts light energy of light guided by the light guide 11 into electric energy (for example, current) by a photovoltaic effect. The photoelectric conversion element 13 may be an aggregated photocell (also referred to as a chemical compound-based photocell), and the active layer thereof is generally a group III-V compound such as gallium arsenide (GaAs) or indium gallium arsenide (In _x Ga _1-x As), aluminum phosphide (AlP) or gallium phosphide (GaP). The photoelectric conversion element 13 can also be a silicon-based photovoltaic cell, and the active layer is generally a germanium wafer or a thin film, wherein the germanium wafer can be a monocrystalline silicon, a multicrystalline silicon or a strip. Ribbon silicon; the film may be cadmium telluride (CdTe), copper indium gallium selenide (CIGS) or amorphous silicon (A-Si). In general, the conversion efficiency of germanium-based photovoltaic cells is lower than that of aggregated photovoltaic cells.

The light stylus pen 100 of the embodiment further includes a power conditioner 14 disposed in the casing 10. The power conditioner 14 receives and adjusts the electric energy (e.g., current) converted by the aforementioned photoelectric conversion element 13 to generate a stable power source. The power conditioner 14 can use various implementation circuits of a conventional power conditioner, the details of which are omitted herein.

This embodiment can also optionally include a power storage element 15 disposed within the housing 10. The power storage element 15 can be a rechargeable battery or a supercapacitor for storing a portion of the electrical energy converted by the photoelectric conversion element 13.

The stable power supply output from the power conditioner 14 is provided as a power source for the drive circuit 16, and the drive circuit 16 is provided in the casing 10. The fourth diagram shows a block diagram of the drive circuit 16. In this embodiment, the driving circuit 16 mainly includes a processor (for example, a microprocessor) 161, and the output signal is amplified by an amplifier (for example, an operational amplifier) 162 to form a driving signal, which is electrically coupled to the conductive block 12. Therefore, when the tip end 121 of the housing 10 of the light stylus pen 100 approaches or touches the touch surface 221 of the touch screen 200, the light stylus pen 100 can transmit a driving signal or receive by the conductive block 12. The signals emitted by the touch panel 22 interact with the touch screen 200 and perform various functions. For example, the touch point signal generated by the tip 121 of the housing 10 of the light stylus 100; the tip 121 of the housing 10 of the light stylus 100 presses the generated Z-axis signal; the light stylus 100 a signal generated by a button (not shown) of the housing 10; or a signal transmitted from the touch panel 22 to the tip end 121 of the housing 10 of the light stylus 100. In this way, the light stylus pen 100 can perform two-way data communication with the touch panel 22 by using the energy in addition to the touch function of the light stylus 100.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the patent application of the present invention; any other equivalent change or repair done without departing from the spirit of the creation. Decorations are to be included in the scope of the patent application below.

100‧‧‧Light stylus

10‧‧‧shell

11‧‧‧Light Guide

111‧‧‧End of light guide

112‧‧‧The proximal end of the light guide

12‧‧‧Electrical block

121‧‧‧ tip

13‧‧‧ photoelectric conversion components

14‧‧‧Power conditioner

15‧‧‧Power storage components

16‧‧‧Drive circuit

Claims (9)

A light energy stylus comprising: a housing; a light guide disposed in the housing, the end of the light guide being disposed near the tip end of the housing and exposed to the surface of the housing, the light entering from the end of the light guide The light guide is derived from the proximal end of the light guide via internal transmission of the light guide; and a photoelectric conversion element is disposed in the housing for converting light energy of the light guided by the light guide into electrical energy. The light stylus according to claim 1, further comprising a conductive block disposed at a tip end of the housing. The light stylus according to claim 2, wherein the end of the light guide surrounds the conductive block. The light stylus of claim 2, wherein the end of the light guide passes through the conductive block. The light stylus according to claim 1, wherein the photoelectric conversion element comprises a concentrating photovoltaic cell. The light stylus according to claim 1, wherein the photoelectric conversion element comprises a bismuth-based photovoltaic cell. The light stylus according to claim 1, further comprising a power regulator disposed in the housing, the power regulator receiving and adjusting and stabilizing the electrical energy converted by the photoelectric conversion element for generating stability Power supply. The light stylus according to claim 7 further includes a driving circuit disposed in the housing, the driving circuit receiving the stable power generated by the power regulator. The light stylus according to claim 8, wherein the driving circuit comprises: a processor; and an amplifier for amplifying the output signal of the processor to generate a driving signal from the tip of the casing Launch or receive a signal from a touch panel.