TWI564772B - An apparatus for detecting an object and a light guide plate touch device using the same - Google Patents

Description

Device for detecting object and light guide plate touch device using the same

The present invention relates to a technique for obtaining the context of an object in a photograph, and is related to a touch technology in which the light guide plate performs internal total reflection internal propagation.

General lens imaging is a plane-to-plane 2D imaging, and we can't get the context of the objects in the photo. Conventional techniques have the use of moving the lens to focus on the front and back to obtain the context of the object, such as the Taiwan Patent I470338 "Detecting device and method of object contour" revealer. There are also ways to create a three-dimensional effect of the foreground or the back scene through a two-lens approach, such as the revealer of the "Three-Dimensional Imaging System and Method" of Taiwan Patent I 477885. Or, as disclosed in Taiwan Patent No. 201249170 "Method for Producing Stereoscopic Image", according to the scene mode of the two-dimensional image, the foreground object and the back scene object in the two-dimensional image are determined, and then the foreground object and the foreground object are determined according to the scene mode. Depth of field information; then, according to the depth of field information, the left eye image and the right eye image of the stereo image are generated.

Taiwan Patent No. I460638 discloses a light guide plate touch device which introduces light emitted from a light emitting unit into a light guide plate for total reflection propagation, and detects a plurality of signals received by all the photosensitive units by a microprocessor, and further compares a plurality of signals to confirm that the object touches the light guide plate to cause a total reflection (FTIR) attenuation signal, thereby confirming at least two photosensitive cells that sense the attenuation signal, and then according to at least two photosensitive cells that sense the attenuation signal Position, obtain the position information of the touch point of the object touching the upper end surface of the light guide plate, and then output a corresponding touch signal.

As shown in FIGS. 1 and 2, the first image 33 and the second image 34 corresponding to the first object 21 and the second object 22 are displayed by taking the photo 30 of the first object 21 and the second object 22 by the lens 10. As shown by the photo 30, only the relative positions of the first object 21 and the second object 22 on a plane (for example, at the XY coordinates) can be known, and the front and rear between the first object 21 and the second object 22 cannot be known. Relative position (for example, in the Z coordinate).

The applicant's application, the Taiwan Patent Application No. 104118214, discloses a device for detecting the position of an object and a light guide plate touch device using the same, which utilizes a light reflecting surface inclined by 45 degrees with the main axis of the lens, respectively. The real image of different image distances taken by the lens is respectively reflected on a photosensitive element to obtain three-dimensional position information of the at least one object.

The inventors have further found that when the distance between the two objects is very close, the above-mentioned Taiwan Patent discloses that it is difficult to obtain the positional information clearly distinguishable between the two objects by using a light reflecting surface which is inclined at a fixed angle of 45 degrees with the main axis of the lens. .

In order to further improve the above-mentioned Taiwan patent, a device for detecting the position of an object and a light guide plate touch device using the same are proposed.

The main object of the present invention is to provide a device for detecting an object, which can obtain the position information of the object by using a single lens, and can further utilize the clear image and the image distance information of the corresponding object to form a three-dimensional contour of the object; and by moving The unit drives the light reflecting surface of the light transmitting plate to move away from or close to the lens, and can finely adjust the position of the light reflecting surface to move to the real image of the object; therefore, even if the distance between the two objects is very close, the position information of the two objects can be obtained. The position information of the object can be obtained more accurately.

Another object of the present invention is to provide a light guide panel touch device capable of conveniently capturing three-dimensional position information of a plurality of touch positions by using a single lens to generate a corresponding touch signal.

The device for detecting an object of the present invention comprises:

a lens for taking an image of at least one object or capturing an image of at least one object touching at least one position of a light guide plate;

a mobile unit;

a light-transmitting plate having at least one light reflecting surface; the light-transmitting plate is disposed behind the lens; the light-transmitting plate is coupled to the moving unit, and the moving unit drives the light-transmitting plate to move away from or close to the lens Directional movement; both the light-transmitting plate and the light-reflecting surface can partially reflect light;

At least one photosensitive element is disposed at a position capable of receiving light reflected by the light reflecting surface to sense an image reflected by the light reflecting surface;

a microprocessor electrically connecting the at least one photosensitive element; the microprocessor knows an image distance according to a position of the photosensitive element in the at least one photosensitive element that senses a clear real image;

The clear reflecting surface of the at least one image distance and the unfocused blurred image captured by the lens are respectively reflected to the at least one photosensitive element in a process of moving away from or close to the lens. The microprocessor determines, according to the image information transmitted by the at least one photosensitive element, image distance information corresponding to a clear image of at least one object, or position information corresponding to a clear image of at least one object touching at least one position of the light guide plate And the image distance information; the microprocessor obtains the position information of the at least one object according to the image distance information of the clear image, or obtains position information of the at least one object touching at least one position of the light guide plate.

The microprocessor of the present invention further confirms the position information corresponding to the clear image of at least one object according to the image information transmitted by the at least one photosensitive element; the microprocessor obtains the position information according to the position information and the image distance information of the clear image. At least one piece of location information.

The apparatus for detecting an object of the present invention further includes a first light source; the first light source emits light containing a modulated signal to illuminate the at least one object, and forms at least one clear real image containing the modulated signal through the lens; the at least one The photosensitive element detects the at least one clear real image containing the modulated signal, and transmits the at least one clear real image information containing the modulated signal to the microprocessor, and the other light source is not irradiated by the other light source, and the lens is formed into another The effect of the real image.

The light reflecting surface of the present invention is inclined at a 45 degree to a major axis of the lens; a light sensing surface of the photosensitive element is parallel to the major axis of the lens.

The light guide plate touch device of the present invention includes the device for detecting the object without the first light source, wherein the light guide plate has a parallel upper end surface and a lower end surface, so that the light is on the upper end surface and the lower end surface Internal total reflection; and includes:

a second light source;

The modulated light emitted by the second light source is used to be introduced into the light guide plate for total internal reflection, and then introduced into the lens; when the at least one object touches at least one touch position of the light guide plate, Corresponding to the modulated light passing through the at least one touch position to generate the internal total reflection propagation, and the image information corresponding to the at least one touch position is captured by the lens; the microprocessor further touches the light guide plate according to the at least one object At least one of the three-dimensional position information of the touched position generates a corresponding touch signal.

The modulated light emitted by the second light source of the present invention is introduced into the light guide plate by a first light guiding unit, and then introduced into the lens by a second light guiding unit.

1‧‧‧Devices for detecting objects

10‧‧‧ lens
11‧‧‧ Spindle

21‧‧‧First object
22‧‧‧Second object

30‧‧‧Photos
31‧‧‧First real image

311, 321 ‧ ‧ unclear image
32‧‧‧Second real image

33‧‧‧ first image
331, 341‧‧‧ Unclear images

34‧‧‧Second image
41‧‧‧Photosensitive elements

411‧‧‧Light sensing surface
42‧‧‧Microprocessor

43‧‧‧First light source
5‧‧‧Translucent plate

50‧‧‧Mobile unit
51‧‧‧Light reflecting surface

52‧‧‧ coating
2‧‧‧Light guide plate touch device

61‧‧‧Light guide plate
611‧‧‧ upper end

612‧‧‧ lower end
62‧‧‧second light source

621‧‧‧Transformed light
63‧‧‧First light guide unit

64‧‧‧Second light guiding unit
65‧‧‧First touch position

66‧‧‧Second touch position

Figure 1 is a schematic illustration of a known lens imaging.

Figure 2 is a schematic illustration of a photograph taken by a known lens.

Figure 3 is a schematic view of the apparatus for detecting an object of the present invention.

Figure 4 is a schematic view of a photograph taken by a device for detecting an object of the present invention.

FIG. 5 is a schematic view of a light guide plate touch device of the present invention.

As shown in FIG. 1 , the first object 21 and the second object 22 disposed on one side of the lens 10 , through the lens 10 , respectively form a corresponding first real image 31 and second real image 32 on the other side of the lens 10 . The distance between the first real image 31 and the second real image 32 and the lens 10 respectively has a corresponding relationship with respect to the distance between the first object 21 and the second object 22 and the lens 10; for example, the first object 21 and the lens When the distance between 10 is shorter than the distance between the second object 22 and the lens 10, the distance between the first real image 31 and the lens 10 will be longer than the distance between the second real image 32 and the lens 10. Therefore, according to the distance between the real image and the lens, the distance between the corresponding object and the lens can be obtained, and the position information of the corresponding object can be known.

As shown in FIG. 3, the apparatus 1 for detecting an object of the present invention comprises a lens 10, a photosensitive element 41, a microprocessor 42, a light transmissive plate 5 and a moving unit 50. The photosensitive element 41 is electrically connected to the microprocessor 42. The photosensitive member 41 can also be composed of a plurality of photosensitive members. The light-transmitting plate 5 has at least one light-reflecting surface 51. The present embodiment has two light-reflecting surfaces 51. The light-transmitting plate 5 and its light-reflecting surface 51 each have a function of partially transmitting light to reflect light. The light reflecting surface 51 may further have a plating film 52. The coating film 52 may partially transmit light and partially reflect light, and the ratio of the reflected light may be adjusted.

The light-transmitting plate 5 is disposed at the rear of the lens 10; the light-transmitting plate 5 is coupled to the moving unit 50, and the moving unit 50 drives the light-transmitting plate 5 to move away from or near the lens 10. The photosensitive element 41 is placed at a position capable of receiving light reflected by the light reflecting surface 51; the light sensing surface 411 of the photosensitive element 41 may be parallel or non-parallel to the major axis 11 of the lens 10.

The light reflecting surface 51 may be inclined at an angle of 45 degrees or other angles to the main axis 11 of the lens 10. The light reflecting surface 51 can respectively move the clear first real image 31, the second real image 32, and the unfocused image 311 of different image distances taken by the lens 10 in the process of moving away from or near the lens 10. 321 is reflected onto the photosensitive element 41.

The microprocessor 42 can respectively know the image distances corresponding to the first object 21 and the second object 22 according to the position of the clear image corresponding to the first real image 31 and the second real image 32 sensed on the photosensitive element 41.

The microprocessor 42 determines the corresponding first object 21 according to the image information transmitted by the photosensitive element 41, as shown in FIG. 4, including the clear first image 33, the second image 34, and the unfocused image 331 and 341. The position of the clear first image 33 and the second image 34 of the second object 22 (for example, at the XY coordinates). The microprocessor 42 can obtain the three-dimensional position (for example, in the X-Y-Z coordinate) of the two objects 21, 22 according to the position information of the clear image and the image distance (for example, the corresponding Z coordinate) information.

As shown in FIG. 3, the apparatus 1 for detecting an object of the present invention may further include a first light source 43. The first light source 43 can emit light containing a modulation signal; the modulated signal can be a signal that modulates the frequency, amplitude or phase of the light.

The first light source 43 emits light containing the modulation signal to illuminate the first object 21 and the second object 22, and the first real image 31 and the second real image 32 including the modulation signal are formed through the lens 10. The photosensitive element 41 can detect the first real image 31 and the second real image 32 including the modulated signal, and transmit the clear first real image 31 and the second real image 32 containing the modulated signal to the microprocessor 42 without being The other light source illuminates the first object 21 and the second object 22, and penetrates the lens 10 to form other first real images and second real images.

The microprocessor 42 senses the position of the clear image corresponding to the first real image 31 and the second real image 32 including the modulation signal according to the photosensitive element 41, and can respectively know the image distance corresponding to the first object 21 and the second object 22. The microprocessor 42 can obtain the three-dimensional position (for example, in the X-Y-Z coordinate) of the two objects 21, 22 according to the position information of the clear image and the image distance (for example, the corresponding Z coordinate) information.

As shown in FIG. 5, the light guide plate touch device 2 of the present invention includes the device for detecting the object without the first light source, and includes a light guide plate 61, a second light source 62, and a first light guiding unit 63. And a second light guiding unit 64. The light guide plate 61 has an upper end surface 611 and a lower end surface 612 which are parallel to each other.

The modulated light ray 621 emitted from the second light source 62 is introduced into the light guide plate 61 by the first light guiding unit 63, and is internally totally reflected and propagated between the upper end surface 611 and the lower end surface 612 of the light guide plate 61, and then is guided by the second light guiding unit. 64 is introduced into the lens 10.

When the first and second objects 21, 22 touch the first and second touch positions 65, 66 of the light guide plate 61, the modulated light rays corresponding to the first and second touch positions 65, 66 will be destroyed to cause total internal reflection. Propagating, and the lens 10 picks up a clear real image corresponding to different image distances of the first and second touch positions 65, 66 and an image with no focus blur, and the light reflecting surface 51 of the light transmissive plate 5 is driven by the moving unit 50. In the process of moving away from or near the lens 10, respectively, reflected to the photosensitive element 41; the microprocessor 42 senses the position of the clear image corresponding to the first and second touch positions 65, 66 according to the photosensitive element 41, The image distances corresponding to the first and second touch positions 65, 66 can be separately known.

The microprocessor 42 according to the position of the clear image corresponding to the first and second touch positions 65, 66 (for example, corresponding XY coordinates) and the image distance corresponding to the first and second touch positions 65, 66 (for example, corresponding to the Z coordinate) The three-dimensional position (for example, at the XYZ coordinate) of the first and second touch positions 65, 66 can be obtained; the microprocessor 42 further touches the first and second touches of the light guide plate 61 according to the first and second objects 21, 22. The three-dimensional position information of positions 65 and 66 generates corresponding touch signals.

The photosensitive element used in the present invention may be a photosensitive coupled device (CCD) or a complementary metal-Oxide semiconductor sensor (CMOS Sensor); the light-transmitting plate may be a transparent acrylic plate or a resin. a light guide plate 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; the first light guiding unit and the second light guiding unit; It can be an optical 截面 with a triangular cross section.

According to the invention, the moving unit drives the light reflecting surface of the light transmitting plate to move away from or close to the lens, and the light reflecting surface can be finely adjusted to move to the position of the real image of the object; therefore, even if the distance between the two objects is very close, the two can be obtained. The location information of the object can more accurately obtain the location information of the object.

The present invention can use an image of a general lens to ingest an object, and it is not necessary to use a lens with a shallow depth of field as disclosed in the above-mentioned Taiwan Patent I470338.

The invention can obtain the three-dimensional position information of the object by using a single lens, and can further utilize the clear image of the corresponding object and the image distance to form the three-dimensional contour of the object, which is a breakthrough in photography related technology.

The light guide plate touch device of the present invention can conveniently take three-dimensional position information of multiple touch positions by using a single lens, and generate corresponding touch signals, which is also a breakthrough in the related art of the light guide plate touch device.

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.

1‧‧‧Devices for detecting objects

10‧‧‧ lens

11‧‧‧ Spindle

21‧‧‧First object

22‧‧‧Second object

31‧‧‧First real image

311, 321 ‧ ‧ unclear image

32‧‧‧Second real image

41‧‧‧Photosensitive elements

411‧‧‧Light sensing surface

42‧‧‧Microprocessor

43‧‧‧First light source

5‧‧‧Translucent plate

50‧‧‧Mobile unit

51‧‧‧Light reflecting surface

52‧‧‧ coating

Claims (10)

A device for detecting an object, comprising:
a lens for taking an image of at least one object or capturing an image of at least one object touching at least one position of a light guide plate;
a mobile unit;
a light-transmitting plate having at least one light reflecting surface; the light-transmitting plate is disposed behind the lens; the light-transmitting plate is coupled to the moving unit, and the moving unit drives the light-transmitting plate to move away from or close to the lens Directional movement; both the light-transmitting plate and the light-reflecting surface can partially reflect light;
At least one photosensitive element is disposed at a position capable of receiving light reflected by the light reflecting surface to sense an image reflected by the light reflecting surface;
a microprocessor electrically connecting the at least one photosensitive element; the microprocessor knows an image distance according to a position of the photosensitive element in the at least one photosensitive element that senses a clear real image;
The clear reflecting surface of the at least one image distance and the unfocused blurred image captured by the lens are respectively reflected to the at least one photosensitive element in a process of moving away from or close to the lens. The microprocessor determines, according to the image information transmitted by the at least one photosensitive element, image distance information corresponding to a clear image of at least one object, or position information corresponding to a clear image of at least one object touching at least one position of the light guide plate And the image distance information; the microprocessor obtains the position information of the at least one object according to the image distance information of the clear image, or obtains position information of the at least one object touching at least one position of the light guide plate. The apparatus for detecting an object according to claim 1, wherein the microprocessor further confirms position information corresponding to a clear image of at least one object according to the image information transmitted by the at least one photosensitive element; the microprocessor Obtaining location information of the at least one object according to the location information and the image distance information of the clear image. The apparatus for detecting an object according to claim 1 , further comprising: a first light source; the first light source emitting light containing a modulation signal to illuminate the at least one object, and forming at least one modulated signal through the lens a clear real image; the at least one photosensitive element detecting the at least one clear real image containing the modulated signal, and transmitting the at least one clear real image information containing the modulated signal to the microprocessor, not being illuminated by the other light source The object, through the lens, forms the effect of other real images. The device for detecting an object according to claim 2, further comprising: a first light source; the first light source emitting light containing a modulation signal to illuminate the at least one object, and forming at least one modulated signal through the lens a clear real image; the at least one photosensitive element detecting the at least one clear real image containing the modulated signal, and transmitting the at least one clear real image information containing the modulated signal to the microprocessor, not being illuminated by the other light source The object, through the lens, forms the effect of other real images. The apparatus for detecting an object according to claim 1, wherein the light reflecting surface is inclined at 45 degrees to a major axis of the lens; a light sensing surface of the photosensitive element is parallel to a major axis of the lens. The device for detecting an object according to claim 2, wherein the light reflecting surface is inclined by 45 degrees with a major axis of the lens; a light sensing surface of the photosensitive element is parallel to a major axis of the lens. The apparatus for detecting an object according to claim 3, wherein the light reflecting surface is inclined at 45 degrees to a major axis of the lens; a light sensing surface of the photosensitive element is parallel to a major axis of the lens. The device for detecting an object according to the invention of claim 4, wherein the light reflecting surface is inclined by 45 degrees with a main axis of the lens; a light sensing surface of the photosensitive element is parallel to the main axis of the lens. A light guide plate touch device comprising the device for detecting an object according to the first, second, fifth or sixth aspect of the patent application, wherein the light guide plate has a parallel upper end surface and a lower end surface, so that the light is Internal total reflection between the upper end surface and the lower end surface; and comprising:
a second light source;
The modulated light emitted by the second light source is used to be introduced into the light guide plate for total internal reflection, and then introduced into the lens; when the at least one object touches at least one touch position of the light guide plate, Corresponding to the modulated light passing through the at least one touch position to generate the internal total reflection propagation, and the image information corresponding to the at least one touch position is captured by the lens; the microprocessor further touches the light guide plate according to the at least one object At least one of the three-dimensional position information of the touched position generates a corresponding touch signal. The light guide plate touch device of claim 9, wherein the modulated light emitted by the second light source is introduced into the light guide plate by a first light guiding unit, and then passed through a second light guiding unit. Was imported into the lens.