CN105183239B - Optical touch device - Google Patents

Abstract

The present invention provides an optical touch device for sensing a sensing position of a reflective pen on a tablet. The optical touch device comprises a sliding bar group, two first optical sensing modules and two second optical sensing modules. The sliding bar group is installed on the tablet, and the sliding bar group comprises a first sliding bar and a second sliding bar. The second sliding bar is movably connected to the first sliding bar. The two first optical sensing modules are arranged on the first sliding bar, and form a first sensing area on the tablet. The two second optical sensing modules are arranged on the second sliding bar, and form a second sensing area on the tablet. The present invention can install the optical touch device on tablets of different sizes, which is convenient for shrinkage and has good storage effect.

Description

Optical touch device

technical field

The invention relates to an optical touch device, in particular to an optical touch device that can be installed on flat panels of different sizes.

Background technique

In modern society, many electronic products have touch functions, such as touch screens of tablet computers or touch pads of notebook computers, which can be easily operated by users with fingers, so electronic products with touch functions are popular Consumers welcome. In order to make the touch function have more diversified applications, related manufacturers have also developed plug-in touch modules, which can be applied to objects with large-sized planes, such as the interrupted optical touch frame shown in Figure 1 500. A general optical touch frame 500 can be installed on a flat panel 600 (such as a blackboard or a whiteboard), and the optical touch frame 500 has a reflective frame 510, two first optical-mechanical modules 520 and two second optical-mechanical modules 530 . The reflective frame 510 has a size corresponding to the flat panel 600 and is configured to be assembled on the flat panel 600 . Two first optical-mechanical modules 520 and two second optical-mechanical modules 530 are arranged on the frame 510. The first optical-mechanical modules 520 are used to emit light to a first sensing area 521 and detect whether the light is detected by foreign objects. Covering, the second optical-mechanical module 530 is used to emit light to a second sensing area 531 and detect whether the light is blocked by foreign objects.

When the reflective frame 510 is installed on the flat panel 600, the first sensing area 521 and the second sensing area 531 will fall on the surface of the flat panel 600; Then the foreign objects will enter the first sensing area 521 or the second sensing area 531 located on the surface of the panel 600 and block the light of the first opto-mechanical module 520 or the second opto-mechanical module 530 . The first optical-mechanical module 520 and the second optical-mechanical module 530 detect that the light is interrupted, and calculate the position where the foreign object touches the tablet 600 by calculating the change of the light signal (such as the angle of reflected light) after the interruption. Therefore, due to the design of the blocking optical touch frame 500 , the large-size tablet 600 can be equipped with a touch function.

However, in the conventional blocking optical touch frame 500 , the size of the reflective frame 510 is fixed, so the reflective frame 510 can only be matched with the flat panel 600 of a fixed size. In addition, the space occupied by the reflective frame 510 is as large as that of the tablet 600 , so for the user, the traditional optical touch frame 500 is difficult to carry.

Therefore, it is necessary to provide a new optical touch system, which can be installed on objects of different sizes and is easy to carry.

Contents of the invention

The main purpose of the present invention is to provide an optical touch device, which can be installed on flat panels of different sizes.

To achieve the above object, the technical solution of the present invention is to provide an optical touch device for sensing a sensing position of a reflective pen on a flat panel. The optical touch device includes a slider group, two first optical sensing modules and two second optical sensing modules. The slide bar set is installed on the flat plate, and the slide bar set includes a first slide bar and a second slide bar. The second slide bar is movably connected to the first slide bar. The two first optical sensing modules are arranged on the first slide bar and form a first sensing area on the flat plate. The two second optical sensing modules are arranged on the second sliding bar and form a second sensing area on the flat plate. Wherein, when the reflective pen is close to the flat plate, the reflective pen enters the first sensing area or the second sensing area; therefore, the first optical sensing module or the second optical sensing module detects the light in the first sensing area or the second sensing area. The reflective pen is used to obtain the sensing position of the reflective pen on the tablet.

According to an embodiment of the present invention, each of the first optical sensing modules and each of the second optical sensing modules further includes a light emitting element and a sensing element. The light-emitting element is used for emitting a light, and the sensing element is used for sensing the reflected light formed after the light is reflected.

According to an embodiment of the present invention, when the reflective pen enters the first sensing area or the second sensing area, the reflective pen touches the light emitted by the light emitting element of the first optical sensing module or the second optical sensing module, and reflect reflected light. When the sensing part of the first optical sensing module or the second optical sensing module senses the reflected light, the first optical sensing module or the second optical sensing module calculates the reflection information of the reflected light to obtain the sensing of the reflective pen Location.

According to an embodiment of the present invention, the overlapping area of the first sensing area and the second sensing area forms an overlapping sensing area. When the reflective pen enters the overlapping sensing area, the first optical sensing module and the second optical sensing module respectively sense the reflected light, and calculate the reflected light respectively sensed by the first optical sensing module and the second optical sensing module The average value of the reflective information to get the sensing position of the reflective pen.

According to an embodiment of the present invention, a first distance between the two first optical sensing modules is ≤92 cm.

According to an embodiment of the present invention, a second distance between the two second optical sensing modules is ≤92 cm.

According to an embodiment of the present invention, two first optical sensing modules are disposed at both ends of the first sliding bar, and two second optical sensing modules are disposed at both ends of the second sliding bar.

According to an embodiment of the present invention, the light emitting element is a light emitting diode (Light Emitting Diode, LED).

In summary of the above technical solutions, the present invention enables the optical touch device to be installed on flat panels of different sizes, and the shortened optical touch device is easy to carry, does not take up too much space, and has a good storage effect.

Description of drawings

FIG. 1 is an exploded perspective view of an optical touch frame and a tablet in the prior art.

FIG. 2 is a schematic diagram of an optical touch device and a tablet according to an embodiment of the present invention.

FIG. 3 is a schematic diagram of an optical touch device according to an embodiment of the present invention.

FIG. 4 is a schematic diagram of an optical touch device in which the size of the slider set is adjusted to a maximum according to an embodiment of the present invention.

FIG. 5 is a schematic diagram of an optical touch device in which the size of the slider set is adjusted to a minimum according to an embodiment of the present invention.

FIG. 6 is a schematic diagram of a first optical sensing module and a reflective pen according to an embodiment of the present invention.

FIG. 7 is a schematic diagram of a second optical sensing module and a reflective pen according to an embodiment of the present invention.

FIG. 8 is a schematic diagram of a first sensing area, a second sensing area and an overlapping sensing area of an optical touch device according to an embodiment of the present invention.

Explanation of symbols in the figure:

Optical touch stand 500

Reflective frame 510

The first optomechanical module 520

The first sensing area 521

The second optomechanical module 530

Second sensing area 531

Tablet 600

Optical touch device 1

slider set 10

first slider 11

Second slider 12

The first optical sensing module 20

The first induction area 21

Luminous parts 22, 32

Sensor 23, 33

The second optical sensing module 30

Second sensing area 31

Overlap sensing area 40

Reflective pen 100

Tablet 200

Sensing position A, A', B, B'

first distance D

Second distance E

Light L, M

Reflected light L', M'

Detailed ways

In order to make the above and other objects, features and advantages of the present invention more comprehensible, specific embodiments of the present invention are listed below and described in detail in conjunction with the accompanying drawings.

Please refer to FIG. 2 to FIG. 8 for an optical touch device according to an embodiment of the present invention. Fig. 2 is a schematic diagram of an optical touch device and a flat panel according to an embodiment of the present invention; Fig. 3 is a schematic diagram of an optical touch device according to an embodiment of the present invention; Fig. 4 is a schematic diagram of a slider group according to an embodiment of the present invention The schematic diagram of the optical touch device whose size is adjusted to the maximum; FIG. A schematic diagram of an optical sensing module and a reflective pen; FIG. 7 is a schematic diagram of a second optical sensing module and a reflective pen according to an embodiment of the present invention; FIG. 8 is a first sensing of an optical touch device according to an embodiment of the present invention Schematic diagram of the region, the second sensing region and the overlapping sensing region.

As shown in FIG. 2 , FIG. 3 and FIG. 8 , an optical touch device 1 according to an embodiment of the present invention is used to sense a sensing position A, A', B, B of a reflective pen 100 on a flat panel 200 '. The reflective pen 100 of this embodiment is a pen holder with a reflective function, which is used for the user to hold and touch the tablet 200 . The tablet 200 of this embodiment is, for example, a whiteboard, blackboard or other objects with a spacious surface of any size. The optical touch device 1 includes a slider set 10 , two first optical sensing modules 20 and two second optical sensing modules 30 .

As shown in FIG. 3 to FIG. 5 , in an embodiment of the present invention, the sliding bar set 10 is installed above the plate 200 , and the sliding bar set 10 includes a first sliding bar 11 and a second sliding bar 12 . A second sliding bar 12 is movably connected to the first sliding bar 11 . By moving between the first slide bar 11 and the second slide bar 12, the overall length of the slide bar set 10 can be lengthened or shortened; therefore, the user can adjust the length of the slide bar set 10 arbitrarily according to the size of the tablet 200 , so as to install the slide bar set 10 on the flat panel 200 . In addition, the shortened slider set 10 takes up less space and is easy to carry and store.

As shown in Figures 6 and 8, in an embodiment of the present invention, two first optical sensing modules 20 are used to form a first sensing area 21 on a flat panel 200 to detect touch behavior. The two first optical sensing modules 20 are respectively disposed at two ends of the first sliding bar 11 , and a first distance D between the two first optical sensing modules 20 is ≤92 cm. Each first optical sensing module 20 includes a light emitting element 22 and a sensing element 23 . The light emitting element 22 of the first optical sensing module 20 is used to emit a light L. When the light L touches the reflective pen 100, the reflective pen 100 will reflect the light L to form a reflected light L'. The sensing part 23 of the first optical sensing module 20 is used to sense the first sensing area 21, which can sense the reflected light L' formed after the light L is reflected, and calculate the reflected light L' The reflection information (such as the incident angle) is used to obtain the sensing position A of the reflective pen 100 . The light emitting element 22 of the first optical sensing module 20 is a light emitting diode (Light Emitting Diode, LED), but the type of the light emitting element 22 is not limited thereto, and it can also be other light sources capable of emitting light.

As shown in Figures 7 and 8, in an embodiment of the present invention, two second optical sensing modules 30 are used to form a second sensing area 31 on the flat panel 200 to detect touch behavior. The two second optical sensing modules 30 are respectively disposed at two ends of the second sliding bar 12 , and a second distance E between the two second optical sensing modules 30 is ≤92 cm. Each second optical sensing module 30 includes a light emitting element 32 and a sensing element 33 . The light-emitting element 32 of the second optical sensing module 30 is used to emit a light M. When the light M touches the reflective pen 100, the reflective pen 100 will reflect the light to form a reflected light M'. The sensing part 33 of the second optical sensing module 30 is used to sense the second sensing area 31, which can sense the reflected light M' formed after the light M is reflected, and calculate the reflected light M' The sensing position B of the reflective pen 100 is obtained by reflecting the information. The light-emitting element 32 of the second optical sensing module 30 is a light-emitting diode, but the type of the light-emitting element 32 is not limited thereto, and it can also be other light sources capable of emitting light.

As shown in Figures 6 to 8, in one embodiment of the present invention, since the slider set 10 has a telescopic function, the slider set 10 shortens when the first slider 11 and the second slider 12 move. , the first optical sensing module 20 and the second optical sensing module 30 respectively arranged on the first sliding bar 11 and the second sliding bar 12 will also move together with the first sliding bar 11 and the second sliding bar 12 Therefore, the first sensing region 21 and the second sensing region 31 formed by the first optical sensing module 20 and the second optical sensing module 30 will also move, so that a part of the first sensing region 21 and a part of the second sensing region The regions 31 overlap each other to form an overlapping sensing region 40 . When the reflective pen 100 enters the overlapping sensing area 40, the first optical sensing module 20 and the second optical sensing module 30 will respectively sense the reflected light L', M'; at this time, the first optical sensing module 20 and the The second optical sensing module 30 obtains different sensing positions A', B' by calculating the reflected light L', M' respectively. Therefore, the first optical sensing module 20 and the second optical sensing module 30 will be different The sensing positions A', B' are calculated again to obtain an average value (for example, calculating the average coordinate value of the sensing position A' and the sensing position B'), the average value is the position of the reflective pen 100 in the overlapping sensing area 40 Location.

As shown in FIG. 2 and FIG. 6 to FIG. 8 , in an embodiment of the present invention, when the user wants to use the optical touch device 1 , the user can adjust the slider set 10 to match the length of the tablet 200 , Then the slide bar set 10 is installed on the flat panel 200 . Next, the user can hold the reflective pen 100 and bring the reflective pen 100 close to the tablet 200 , then the reflective pen 100 will enter the first sensing area 21 or the second sensing area 31 . If the reflective pen 100 enters the first sensing area 21, the reflective pen 100 will reflect the reflected light L'; the first optical sensing module 20 can detect the reflected light L' reflected by the reflective pen 100 in the first sensing area 21, and Reflection information (such as incident angle) of the reflected light L′ is calculated to obtain the sensing position A of the reflective pen 100 on the flat panel 200 . If the reflective pen 100 enters the second sensing area 31, the reflective pen 100 will reflect the reflected light M'; the second optical sensing module 30 can detect the reflected light M' reflected by the reflective pen 100 in the second sensing area 31, and The reflection information of the reflected light M′ is calculated to obtain the sensing position B of the reflective pen 100 on the flat panel 200 .

In an embodiment of the present invention, if the user brings the reflective pen 100 close to the panel 200 and enters the overlapping sensing area 40, the reflective pen 100 will reflect the reflected light L' and the reflected light M'. The first optical sensing module 20 or the second optical sensing module 30 can respectively know the sensing position of the reflective pen 100 by detecting the reflection information of the reflected light L' and the reflected light M' of the reflective pen 100 in the overlapping sensing area 40 A' and induction position B'. Then, the first optical sensing module 20 and the second optical sensing module 30 will recalculate the sensing position A' and the sensing position B' to obtain an average value (for example, calculate the sensing position A' and sensing position B' Average coordinate value), the average value is the position of the reflective pen 100 in the overlapping sensing area 40 .

According to the design of the optical touch device 1 of the present invention, the optical touch device 1 can be installed on the flat panel 200 of different sizes, and the shortened optical touch device 1 is easy to carry, does not take up too much space, and has a good storage effect .

To sum up, the present invention shows its features that are completely different from the prior art in terms of purpose, means, and efficacy. I sincerely hope that your examiner will be aware and grant a patent as soon as possible to benefit the society. However, it should be noted that the above-mentioned embodiments are examples only for the convenience of description, and the scope of rights claimed by the present invention should be determined by the scope of the patent application, rather than being limited to the above-mentioned embodiments.

Claims (8)

1. A kind of 1. optical touch control apparatus, to sense a reflective pen in the sensed position on a flat board, it is characterised in that the light Learning contactor control device includes：

   One slide bar group, is installed on the flat board, and the slide bar group includes：

   One first slide bar；And

   One second slide bar, movably connect first slide bar；

   Two the first optical sensor modules, located at first slide bar, and in one first induction zone of formation on the flat board；And

   Two the second optical sensor modules, located at second slide bar, and in one second induction zone of formation on the flat board；

   Wherein when the reflective pen is close to the flat board, the reflective pen enters first induction zone or second induction zone；Therefore, institute The first optical sensor module or the second optical sensor module are stated, by detecting in first induction zone or second induction zone The reflective pen, and the reflective pen is obtained in the sensed position on the flat board；Two first optical sensor modules and described Two the second optical sensor modules are located along the same line.
2. 2. optical touch control apparatus as claimed in claim 1, it is characterised in that each first optical sensor module and each second Optical sensor module also includes an illuminating part and a sensing member；The illuminating part is to launch a light, and the sensing member is sensing The reflected light formed after light reflection.
3. 3. optical touch control apparatus as claimed in claim 2, it is characterised in that when the reflective pen enters first induction zone or should During the second induction zone, the reflective pen touch the first optical sensor module or the second optical sensor module this is luminous The light that part is launched, and reflect the reflected light；When the first optical sensor module or the second optical sensor module Sensing member when sensing the reflected light, the first optical sensor module or the second optical sensor module calculate the reflection One reflective information of light and obtain the sensed position of the reflective pen.
4. 4. optical touch control apparatus as claimed in claim 3, it is characterised in that first induction zone and the second sensing area overlapping Region formed an overlapping induction zone；When the reflective pen enters the overlapping induction zone, the first optical sensor module and institute State the second optical sensor module and sense the reflected light respectively, and calculate the first optical sensor module and second optics One mean values of the reflective information of the reflected light that inductive module senses respectively, to obtain the sensing position of the reflective pen Put.
5. 5. optical touch control apparatus as claimed in claim 4, it is characterised in that one between two the first optical sensor modules One spacing≤92 centimetre.
6. 6. optical touch control apparatus as claimed in claim 4, it is characterised in that one between two the second optical sensor modules Two spacing≤92 centimetre.
7. 7. the optical touch control apparatus as described in claim 5 or 6, it is characterised in that two the first optical sensor modules are located at should The both ends of first slide bar, two the second optical sensor modules are located at the both ends of second slide bar.
8. 8. optical touch control apparatus as claimed in claim 7, it is characterised in that the illuminating part is light emitting diode.