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Thin film lightguide crossbar switching module

A vertical and horizontal switch and optical waveguide technology, applied in the coupling of optical waveguides, electronic switches, pulse technology, etc., can solve the problems of high-efficiency mass production, low transmission efficiency, large loss, etc., and achieve easy and efficient mass production and compact circuit structure The effect of simplicity and simplified production process

Inactive Publication Date: 2010-09-29
陈峰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Taking the computer keyboard as an example, in order to realize the low-cost application of photoelectric technology in the field of computer keyboards and various remote controls, it is necessary to make the transmission efficiency of the LED light source high; to make the number of LED light sources and photosensitive tubes small; One end (on the same PCB board), so that there is no key position conflict on the computer keyboard. Most of the currently known technologies adopt: each row is equipped with an inexpensive LED light source, so that the propagation light path of the LED light source passes through the bottom of each key, and the key is pressed. At the same time, the reflective surface connected to the button reflects the light signal to the photosensitive tube. Due to the low transmission efficiency of light in the air, the loss is large. At the same time, due to factors such as scattering and reflection of the LED light source, there is crosstalk in each row. At the same time, it is made of plastic. The pointing accuracy of the key reflective surface cannot be guaranteed, and it is impossible to solve the problem of computer keyboard key conflict. However, it is very difficult to mass produce low-cost and high-efficiency keyboards. The production cost is several times that of traditional keyboards, which seriously affects the promotion and use of optical keyboards.

Method used

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  • Thin film lightguide crossbar switching module
  • Thin film lightguide crossbar switching module
  • Thin film lightguide crossbar switching module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Figure 1 to Figure 11 It is a structural diagram of a thin-film optical waveguide crossbar switch module using a 20-key keyboard with row-connected sub-light sources 26.

[0057] see Figure 1 to Figure 11 The present invention consists of a CPU circuit controller (not shown in the figure), an emitting film 4 with a row emitting optical waveguide 1, a receiving film 16 with a receiving optical waveguide 10, an optical switch 18, a unit sub-light source 24, a row light source 19, and a row feature The signal generator 22, the receiving unit 17, and the like are constituted.

[0058] see Figure 1 ~ Figure 2 The emitting optical waveguide 1 and receiving optical waveguide 10 are formed by using special printing such as mold transfer printing technology or planar optical printing and etching technology on the emitting film 4 and receiving film 16 .

[0059] see figure 1 There are cantilever stroke spaces 2 arranged vertically and horizontally on the emitting film 4 an...

Embodiment 2

[0089] see Figure 8 , Figure 9 The multi-channel on-off light source 23 is formed by a semiconductor light source 21 corresponding to a multi-channel optical switch 22;

[0090] The unit sub-light source 24 is formed correspondingly by the switching unit constituting the multi-channel optical switch 22 and the semiconductor light source 21,

[0091] The row connection sub-light source 26 is formed by the switch unit of a unit sub-light source 24 of one row being electrically connected with the switch unit of a single unit sub-light source 24 of another row, and the row connection sub-light source 26 is controlled by a CPU circuit controller (not shown in the figure) on and off. The collectors of the frequency switching transistors 27 of each row are electrically connected to the anode of one semiconductor light source 21 of each row, and the cathodes of the semiconductor light sources 21 of each row are all connected to the ground.

[0092] All the other are the same as e...

Embodiment 3

[0094] Figure 12 -- Figure 14 It is a film optical waveguide crossbar switch module for a photoelectric remote control keyboard.

[0095] see Figure 10 In order to make the structure compact and reduce the number of unit sub-light sources 24 at the same time, the emitting light waveguide 1 of the upper half of the light switch 18 is printed on the front of the A film 28, and the emitting light waveguide 1 of the lower half of the light switch 18 is printed on the A film 28 The front ends of the emitting optical waveguides 1 on the front and back sides are all on the lower edge of the A film 28, and the emitting optical waveguides 1 of each column are composed of a number of non-interfering row emitting sub-optical waveguides 3 that are the same as the number of optical switches 18. The front section of the sub-optical waveguide 3 is upright and located on the left of the optical switch 18 , and the back section extends upward to the right. The front section and the back s...

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Abstract

The invention relates to a thin film lightguide crossbar switching module which has the characteristics of greatly improved comprehensive properties and low manufacture cost. The thin film lightguide crossbar switching module comprises a CPU circuit controller, a receiving part 17, a row light source 19, a transmitting lightguide 1 and a receiving lightguide 10 and is characterized in that a row transmitting lightguide front end 7 and a line transmitting lightguide front end 32 respectively correspond to the row light source 19 and a line on-off light source 38, a row transmitting lightguide tail end 6 and a line transmitting lightguide tail end 36 form optical switches 18 respectively corresponding to a receiving lightguide front end 15; when the optical switches 18 are pressed, signals sent by the row light source 19 and the line on-off light source 38 are respectively conducted with a light path of a receiving pipe 17a through a row transmitting sub-lightguide 3, a line transmitting sub-lightguide 34, the optical switches 18, the receiving lightguide 10 and the light path of the receiving pipe 17a; and the light path of the receiving pipe 17a outputs a group of characteristic signals corresponding to positions of the optical switches 18 to the CPU circuit controller. The invention has simple structure, reduced number of the photoelectric elements, in addition, the receiving lightguide and the optical switch can be formed on a film, and the invention is applied to the fields of keyboards, electric appliance remote controllers and the like.

Description

Technical field [0001] The invention relates to a thin-film optical waveguide crossbar switch module for a keyboard, in particular to an input switch module in which an optical waveguide and an optical switch are formed on a thin film for signal transmission. Background technique [0002] Taking the computer keyboard as an example, in order to realize the low-cost application of photoelectric technology in the field of computer keyboards and various remote controls, it is necessary to make the transmission efficiency of the LED light source high; to make the number of LED light sources and photosensitive tubes small; One end (on the same PCB board), so that there is no key position conflict on the computer keyboard. Most of the currently known technologies adopt: each row is equipped with an inexpensive LED light source, so that the propagation light path of the LED light source passes through the bottom of each key, and the key is pressed. At the same time, the reflective s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/35G06F3/023H03K17/969
Inventor 陈峰
Owner 陈峰