TW201621569A - Light guide plate light vibration touch control device - Google Patents

Abstract

A light guide plate light vibration touch control device utilizes vibration generated by a light guide plate that is touched to enable light beam corresponding to a touched point carrying with a newly added low frequency vibration signal so that a microprocessor compares vibration signal values respectively outputted by an optical signal processing unit and a vibration detection unit. If the vibration signal value outputted by the optical signal processing unit is equal or close to the vibration signal value outputted by the vibration detection unit, it is confirmed that the vibration signal value outputted by the optical signal processing unit corresponds to a touch signal. Within a cycle, the microprocessor detects signal values sequentially outputted by the optical signal processing unit and acquires position information of the touched point according to time points, which are for two vibration signal values corresponding to the touched signal, respectively occurring within the cycle, thereby further outputting a corresponding touch control signal.

Description

Light guide plate light vibration touch device 【0001】

The present invention relates to a touch device, and more particularly to a touch device for detecting a position at which a light carrying a signal is touched while propagating in a light guide plate, and generating a relative control signal.

【0002】

There are a number of touch devices that incorporate a light guide plate. For example, US Pat. No. 7,432,893 discloses an input device based on Frustrated Total Internal Reflection (FTIR), which introduces light from at least two light sources at different positions into the light guide plate. And causing the light to propagate in the light guide plate with complete internal reflection, wherein the light emitted by each light source is evenly distributed throughout the light guide plate, and a light sensor array is disposed on the periphery of the light guide plate to detect Light produced by a light source. When an object contacts the surface of the light guide plate, the total reflection of the light propagating in the light guide plate is destroyed, and the light passing through the contact area is attenuated; and a processor is used to detect different positions according to the light sensor array. The attenuation signal of the light emitted by at least two of the light sources determines the position of the object by triangulation.

[0003]

The US Patent Publication No. US2011074735 and the corresponding Taiwan Patent Publication No. 201005606, the US Patent Publication No. US20130044073, and the corresponding Taiwan Patent Publication No. 201203052, and the US Patent Publications US20120162144, US201220268403, and US20130021300 are respectively touch technologies using a light guide plate.

[0004]

The above-mentioned touch technology using the light guide plate needs to respectively introduce light emitted by at least two light sources at different positions into the light guide plate for total reflection propagation, and is detected by the processor according to at least two light sensor arrays. The attenuation signal of the light emitted by the at least two light sources determines the position of the object touching the light guide plate to generate a corresponding touch signal. However, if light is not incident on the inside of the light guide plate at a specific angle, internal total reflection cannot be performed inside the light guide plate. It is difficult to finely adjust the incident angle of the light and it is necessary to match the light guiding elements to increase the thickness or area of the touch device. In addition, if the area of the touch contact is very narrow, such as the tip of the toothpick, the internal total reflection of the light propagating in the light guide plate cannot be destroyed, and the relative control signal cannot be obtained.

[0005]

The present invention has been proposed in order to further improve the conventional light guide plate touch device.

[0006]

The main object of the present invention is to provide a light-guide plate light-vibrating touch device, which uses the vibration generated when the light guide plate is touched, so that the light corresponding to the touch contact carries a new low-frequency vibration signal; The vibration signal value output by the optical signal processing unit and the vibration detecting unit respectively confirms the vibration outputted by the optical signal processing unit if the vibration signal value output by the optical signal processing unit is equal to or nearly equal to the vibration signal value outputted by the vibration detecting unit. The signal value corresponds to a touch signal; the microprocessor detects the signal value sequentially output by the optical signal processing unit in a cycle, and then appears in the cycle according to at least two vibration signal values corresponding to a touch signal. At the time point, the position information of the touch contact is obtained, and then a corresponding touch signal is output; the light emitted from the light signal emitting unit does not have to be injected into the light guide plate at a specific angle to perform total internal reflection, so that no difficulty is required. Adjust the angle of incidence of the light.

【0007】

Another object of the present invention is to provide a light-guide plate optical vibration touch device, wherein the area of the touch light guide plate is very narrow, and the generated vibration still affects the stability of the light signal, thereby obtaining the position information of the touch contact. It does not need to destroy the internal total reflection of light inside the light guide plate, which can improve the practical function of the touch device.

[0008]

The light-guide plate optical vibration touch device of the invention comprises:

【0009】

a light guide plate;

[0010]

a microprocessor

[0011]

At least one optical signal emitting unit electrically connected to the microprocessor;

[0012]

At least one photosensitive unit for sensing light emitted by the light signal emitting unit into the light guide plate;

[0013]

An optical signal processing unit electrically connecting the microprocessor and the photosensitive unit to detect a signal output by the photosensitive unit, and then processing the signal to obtain a signal value, and then transmitting the signal value to the microprocessor;

[0014]

a vibration detecting unit electrically connecting the microprocessor to detect vibration generated when the light guide plate is touched, and then transmitting the vibration signal value to the microprocessor;

[0015]

The light emitted by the light signal is a light carrying a signal; the vibration generated when the light guide plate is touched causes the light corresponding to the touch contact to carry a newly added low frequency vibration signal, so that the optical signal processing unit obtains Corresponding vibration signal value, the vibration detecting unit detects the vibration generated when the light guide plate is touched, and then outputs a vibration signal value; and then causes the microprocessor to compare the optical signal processing unit with the vibration detection If the vibration signal value outputted by the optical signal processing unit is equal to or nearly equal to the vibration signal value outputted by the vibration detecting unit, it is confirmed that the vibration signal value output by the optical signal processing unit corresponds to a touch Touching the signal; the microprocessor detects the signal value sequentially output by the optical signal processing unit in a cycle, and then appears in the cycle according to at least two vibration signal values corresponding to a touch signal At the time point, the position information of the touch contact is obtained, and then a corresponding touch signal is output.

[0016]

For other purposes and functions of the present invention, please refer to the drawings and the embodiments, which are described in detail below.

[0049]

1, 2, 3‧‧‧ Light guide plate light vibration touch device

[0050]

10‧‧‧Light guide plate
101, 102, 103, 104‧‧‧

[0051]

11‧‧‧ upper end
12‧‧‧ lower end

[0052]

13‧‧‧ side end face
14‧‧‧Rejector

[0053]

S, L1, L2‧‧‧ line θ1, θ2‧‧‧ angle

[0054]

15‧‧‧Reflective film

[0055]

20‧‧‧Photosensitive unit
21‧‧‧Vibration signal without vibration

[0056]

22‧‧‧Vibration signal with vibration
30,300‧‧‧Light signal injection unit

[0057]

31, 32‧‧‧ rays
40‧‧‧Microprocessor

[0058]

51‧‧‧Light signal processing unit
52‧‧‧Vibration detection unit

[0059]

60‧‧‧Operating area
70‧‧‧ objects

[0060]

P‧‧‧ touching contact

[0017]

FIG. 1 is a top plan view showing a light-contacting touch device of a light guide plate according to a first embodiment of the present invention.

[0018]

FIG. 2 is a schematic diagram of light propagation in a light-vibrating touch device of a light guide plate according to a first embodiment of the present invention.

[0019]

Figure 3 is a schematic diagram of the vibration signal during the one-week period.

[0020]

Fig. 4 is a schematic view showing the propagation of light in a light-vibrating touch device of a light guide plate according to a second embodiment of the present invention.

[0021]

Fig. 5 is a top plan view showing the light-shielding touch device of the light guide plate according to the third embodiment of the present invention.

[0022]

Fig. 6 is a schematic view showing the propagation of light in a light-vibrating touch device of a light guide plate according to a third embodiment of the present invention.

[0023]

As shown in FIGS. 1 and 2, the light-guide plate optical vibration touch device 1 of the first embodiment of the present invention includes a light guide plate 10, a plurality of photosensitive cells 20, at least two optical signal emitting units 30, and a microprocessor. 40. An optical signal processing unit 51 and a vibration detecting unit 52.

[0024]

The light guide plate 10 has a rectangular shape and has an upper end surface 11, a lower end surface 12 and a side end surface 13. The peripheral edge of the side of the light guide plate 10 forms a side end surface 13. The light guide plate 10 is a bendable or non-bendable plate made of a light-guiding material such as an acrylic plate, a resin plate or a glass plate.

[0025]

The photosensitive unit 20 can be a photodiode or any photosensitive element. The photosensitive unit 20 is in contact with or adjacent to the side end surface 13 of the light guide plate 10 for sensing the light 31 emitted from the light signal emitting unit 30 into the light guide plate 20.

[0026]

The light signal emitting unit 30 is electrically connected to the microprocessor 40; the light signal emitting unit 30 is disposed outside the side end surface 13 of the light guide plate 10; the light signal emitting unit 30 emits the light 31 carrying the signal and is introduced into the light guide plate 10 to form an operation. District 60. A plurality of photosensitive cells 20 and at least two optical signal emitting units 30 are disposed outside the operation area 60. The light signal emitting unit 30 may be an LED light signal emitting unit or a laser light signal emitting unit or the like.

[0027]

The optical signal processing unit 51 electrically connects the photosensitive unit 10 and the microprocessor 40, respectively. The optical signal processing unit 51 detects the signal output from the photosensitive unit 20, then processes the signal to obtain a vibration signal, and then transmits the vibration signal value to the microprocessor 40.

[0028]

The vibration detecting unit 52 is electrically connected to the microprocessor 40. The vibration detecting unit 52 detects the vibration generated when the light guide plate 10 is touched, and then transmits the vibration signal value to the microprocessor 40.

[0029]

If no object 70 is touching the upper end surface 11 of the light guide plate 10, the optical signal processing unit 51 will obtain the signal value 21 without the vibration signal, as shown in Fig. 3, and then transmit the signal value without the vibration signal to the micro processing. If the object 70 performs a touch operation in the operation area 60 and touches a touch contact P of the upper end surface 11 of the light guide plate 10, the light guide plate 10 is subjected to vibration, so that the corresponding touch contact P is The light rays 31, 32, that is, the touched contact P or the two light rays 31, 32 directly underneath, carry the newly added low frequency vibration signal, so that the optical signal processing unit 51 obtains the corresponding vibration signal value 22, as shown in Fig. 3. The vibration signal value is then transmitted to the microprocessor 40. At the same time, the vibration detecting unit 52 detects the vibration generated when the light guide plate 10 is touched, and then transmits the vibration signal value to the microprocessor 40.

[0030]

Then, the microprocessor 40 compares the vibration signal values respectively output by the optical signal processing unit 51 and the vibration detecting unit 52, and if the vibration signal value output by the optical signal processing unit 51 is equal to the vibration signal value output by the vibration detecting unit 52 or When they are nearly equal, it is confirmed that the vibration signal value output by the optical signal processing unit 51 corresponds to a touch signal.

[0031]

The microprocessor 40 detects the signal value sequentially output by the optical signal processing unit 51 in a cycle, and then obtains the time value according to the at least two vibration signal values corresponding to a touch signal respectively in the period. Touching the position information of the contact P, and then outputting a corresponding touch signal.

[0032]

As shown in the first and third figures, the two optical signal emitting units 30 sequentially emit the two rays 31, 32 passing through the touch contact P, which will be on the path corresponding to the two rays 31, 32 (line L1, line L2). The two photosensitive units 20 detect and output a new low frequency vibration signal, thereby causing the optical signal processing unit 51 to obtain two vibration signal values 22. As described above, when the microprocessor 40 confirms that the vibration signal value output by the optical signal processing unit 51 corresponds to a touch signal, two output new signals can be obtained according to the time points when the two vibration signal values 22 appear in one cycle respectively. The position of the photosensitive unit 20 of the increased low-frequency vibration signal can further obtain the angles θ1 and θ2 between the connection line S between the two optical signal emitting units 30 and the line L1 and the line L2, respectively.

[0033]

As shown in Fig. 1, the coordinates of the touch contact P can be calculated by the known triangular formula by the length and angles θ1, θ2 of the connecting line S.

[0034]

As shown in FIG. 4, the light-guide plate optical vibration touch device 2 of the second embodiment of the present invention includes a light guide plate 10, a plurality of photosensitive cells 20, at least two optical signal emitting units 30, and a microprocessor 40. An optical signal processing unit 51 and a vibration detecting unit 52 are formed.

[0035]

The second embodiment of the present invention is different from the first embodiment except that a plurality of photosensitive cells 20 and at least two optical signal emitting units 30 are disposed below the lower end surface 12 of the light guide plate 10; The signal value sequentially output by the optical signal processing unit 51 is detected in one cycle, and then the position information of the touch contact P is obtained according to the time point at which the at least two vibration signal values corresponding to one touch signal respectively appear in the cycle. The operation mode, function, and calculation manner of outputting a corresponding touch signal are the same as those in the first embodiment, and details are not described herein again.

[0036]

As shown in FIGS. 5 and 6, the light-guide plate optical vibration touch device 3 of the third embodiment of the present invention includes a light guide plate 10, at least one photosensitive unit 20, an optical signal emitting unit 300, and a micro processor 40. An optical signal processing unit 51 and a vibration detecting unit 52 are composed of at least one retro reflector 14. The light guide plate 10 has four sides 101, 102, 103, 104.

[0037]

In this embodiment, the optical signal emitting unit 300 is disposed at a corner 100 of the light guide plate 10, and emits light to scan the entire operation area 60. The two photosensitive units 20 are respectively close to the optical signal emitting unit 300 and are in contact with or adjacent to the light guide plate 10. At least one of the end face 12 or the side end face 13 and one end of the two elongated retroreflectors 14 are adjacent to the photosensitive unit 20, and the contact light guide plate 10 corresponds to the side end faces 13 of the two sides 101, 104, and other photosensitive The connection relationship and function between the unit 20, the optical signal emitting unit 300, the microprocessor 40, the optical signal processing unit 51, and the vibration detecting unit 52 are the same as those in the first embodiment, and will not be described again.

[0038]

The optical signal emitting unit 300 of the embodiment may include a flip mirror or a mechanism including a Micro-Electro-Mechanical System (MEMS) and a Micro-Opto-Electro-Mechanical System (MEMS). Cause light to scan the operating area.

[0039]

In this embodiment, the side end faces 13 of the sides 102, 103 of the light guide plate 10 that are not in contact with the retroreflector 14 are respectively adhered to the two reflective films 15 to enhance the reflection effect when the light hits the side end faces 13.

[0040]

In this embodiment, only one retroreflector 14 may be used, the light guide plate 10 is in contact with the side end surface 13 of one of the two sides 101, 104, or only one retroreflector 14 is disposed at a position opposite to the photosensitive unit 20. For example, the contact light guide plate 10 is disposed at a position corresponding to the side end surface 13 of the side 102 or the side 103; the side end surface 13 of the light guide plate 10 not contacting the other side of the retroreflector 14 may be adhered to the three reflective films 15 respectively to enhance The reflection effect when the light hits the side end face 13.

[0041]

In the present embodiment, the light-emitting units 300 are sequentially scanned by the optical signal emitting unit 300 to emit light beams 31, 32, and 33, which are respectively guided into the inside of the light guide plate 10 by the side end surface 13 of the light guide plate 10, and the entire operation area 60 is scanned. When the light hits the side end faces 13 of the two sides 102, 103, part of the light is reflected back to the inside of the light guide plate 10 by the side end faces 13; and the rays 31, 32, 33 respectively incident on the retroreflector 14 will pass through the original The path is retroreflected to the light signal emitting unit 300. Since the light propagates with diffusing properties, the light rays 31, 32, 33 that are retroreflected to the light signal emitting unit 300 also strike the photosensitive unit 20 near the light signal emitting unit 300. .

[0042]

As described in the first embodiment, if no object 70 touches the upper end surface 11 of the light guide plate 10, the optical signal processing unit 51 will obtain a signal value without a vibration signal; if any object 70 is touched in the operation area 60 When the touch operation is performed and the touch contact of the upper end surface 11 of the light guide plate 10 is touched, the light guide plate 10 is vibrated, and the light rays 31, 32, 33 corresponding to the touch contacts are loaded with the newly added low frequency vibration signal. The optical signal processing unit 51 is caused to obtain a corresponding vibration signal value.

[0043]

Similarly, the microprocessor 40 detects the signal value sequentially output by the optical signal processing unit 51 in a cycle, and then according to the time point at which the at least two vibration signal values corresponding to a touch signal respectively appear in the cycle. The position information of the touch contact is obtained, and then a corresponding touch signal is output.

[0044]

In this embodiment, reference may be made to the coordinate calculation technique disclosed in the "Laser Scanning Input Device" of the Taiwan Patent Publication No. 201342161, which is applied by the microprocessor 40, and the microprocessor 40 detects the optical signal processing unit 51 in a cycle. The vibration signal value is then obtained according to the time point at which the at least two vibration signal values respectively appear in the period, and the position information of the touch contact is obtained, thereby outputting a corresponding touch signal.

[0045]

The invention can also first test and then record information about the position of the touch contact of the object touching the upper end surface of the light guide plate and at least two time points of the vibration signal value outputted by the optical signal processing unit in one cycle, and then make the micro processing According to the related information and at least two time points according to the value of the vibration signal output by the optical signal processing unit in one cycle, the position information of the touch contact of the upper end surface of the object touching the light guide plate is obtained.

[0046]

The invention is characterized in that when the light guide plate is touched, the light corresponding to the touch contact is loaded with a new low frequency vibration signal, so that the photosensitive unit on the path corresponding to the light of the contact contact outputs a vibration signal, thereby making the light The signal processing unit obtains the vibration signal value; and then causes the microprocessor to compare the vibration signal value respectively output by the optical signal processing unit and the vibration detecting unit, if the vibration signal value output by the optical signal processing unit and the vibration signal output by the vibration detecting unit If the values are equal or nearly equal, it is confirmed that the vibration signal value output by the optical signal processing unit corresponds to a touch signal; and the microprocessor detects the signal value sequentially output by the optical signal processing unit in a cycle, and then according to the corresponding one. The at least two vibration signal values of the touch signal respectively obtain the position information of the touch contact at a time point appearing in the cycle, thereby outputting a corresponding touch signal.

[0047]

The light emitted from the optical signal emitting unit of the present invention does not have to be incident on the inside of the light guide plate at a specific angle to perform total internal reflection, so that it is not necessary to adjust the incident angle of the light. In addition, even if the area of the touch contact is very small, for example, the tip of the toothpick touches the light guide plate, the vibration generated when the light guide plate is touched still affects the stability of the optical signal, thereby obtaining the position information of the touch contact, without Destroying the total internal reflection of light inside the light guide plate can improve the practical function of the touch device.

[0048]

The above descriptions are only examples of the use of the technical content of the present invention, and any modifications and variations made by those skilled in the art using the present invention are within the scope of the patent claimed.

Domestic registration information [please note according to the registration authority, date, number order]


Foreign deposit information [please note according to the country, organization, date, number order]

1‧‧‧Light guide plate light vibration touch device

10‧‧‧Light guide plate

11‧‧‧ upper end

13‧‧‧ side end face

20‧‧‧Photosensitive unit

30‧‧‧Light signal injection unit

31, 32‧‧‧ rays

40‧‧‧Microprocessor

51‧‧‧Light signal processing unit

60‧‧‧Operating area

70‧‧‧ objects

S, L1, L2‧‧‧ lines

θ 1 , θ 2‧‧‧ angle

P‧‧‧ touching contact

Claims (9)

[Item 1] A light-guide plate light vibration touch device comprises:
a light guide plate;
a microprocessor
At least one optical signal emitting unit electrically connected to the microprocessor;
At least one photosensitive unit for sensing light emitted by the light signal emitting unit into the light guide plate;
An optical signal processing unit electrically connecting the microprocessor and the photosensitive unit to detect a signal output by the photosensitive unit, and then processing the signal to obtain a signal value, and then transmitting the signal value to the microprocessor;
a vibration detecting unit electrically connecting the microprocessor to detect vibration generated when the light guide plate is touched, and then transmitting the vibration signal value to the microprocessor;
The light emitted by the light signal is a light carrying a signal; the vibration generated when the light guide plate is touched causes the light corresponding to the touch contact to carry a newly added low frequency vibration signal, so that the optical signal processing unit obtains Corresponding vibration signal value, the vibration detecting unit detects the vibration generated when the light guide plate is touched, and then outputs a vibration signal value; and then causes the microprocessor to compare the optical signal processing unit with the vibration detection If the vibration signal value outputted by the optical signal processing unit is equal to or nearly equal to the vibration signal value outputted by the vibration detecting unit, it is confirmed that the vibration signal value output by the optical signal processing unit corresponds to a touch Touching the signal; the microprocessor detects the signal value sequentially output by the optical signal processing unit in a cycle, and then appears in the cycle according to at least two vibration signal values corresponding to a touch signal At the time point, the position information of the touch contact is obtained, and then a corresponding touch signal is output. [Item 2] The light-guide plate optical vibration touch device of claim 1, wherein the light guide plate has an upper end surface, a lower end surface, and a side end surface; the peripheral edge of the light guide plate forms the side end surface; the optical signal emitting unit contacts Or adjacent to one of a side end surface or a lower end surface of the light guide plate; the light emitted by the light signal emitting unit is introduced into the light guide plate to form an operation area; the photosensitive unit contacts or is adjacent to a side end surface or a lower end surface of the light guide plate. one. [Item 3] The light-guide plate optical vibration touch device of claim 2, wherein a plurality of the photosensitive cells and at least two of the light signal emitting units are disposed outside the operation area. [Item 4] The light-guide plate optical vibration touch device of claim 2, wherein the light guide plate has a rectangular shape and has four sides; the light signal emitting unit is disposed outside a corner of the light guide plate; the photosensitive unit is adjacent to The light signal is emitted from the unit; the side end faces of the two sides of the light guide plate respectively contact the two retroreflectors; one ends of the two retroreflectors are respectively adjacent to the photosensitive unit. [Item 5] The light-guide plate optical vibration touch device of claim 4, wherein the side surfaces of the other two sides of the light guide plate that are not in contact with the two retroreflectors are respectively adhered to two reflective films to enhance the light. The reflection effect when the side faces of the other two sides are touched. [Item 6] The light-guide plate optical vibration touch device of claim 2, wherein the light guide plate has a rectangular shape and has four sides; the light signal emitting unit is disposed outside a corner of the light guide plate; the photosensitive unit is adjacent to The light signal is emitted from the unit; a side end surface of one side of the light guide plate contacts a retroreflector. [Item 7] The light-guide plate optical vibration touch device of claim 6, wherein the side surfaces of the other three sides of the light guide plate that are not in contact with the retroreflector are respectively adhered to the three reflective films to enhance the light. The reflection effect on the side faces of the other three sides. [Item 8] The light-guide plate optical vibration touch device according to any one of claims 1 to 7, wherein the light guide plate is one of a bendable plate body or an inflexible plate body made of a light-guiding material. . [Item 9] The light-guide plate optical vibration touch device of claim 8, wherein the photosensitive unit is a photosensitive diode; and the optical signal emitting unit is one of an LED light signal emitting unit or a laser light signal emitting unit.