KR20150080196A

KR20150080196A - Position sensing apparatus

Info

Publication number: KR20150080196A
Application number: KR1020130167954A
Authority: KR
Inventors: 유동민; 허지민; 장병탁; 조현용; 김용광
Original assignee: 주식회사 루멘스
Priority date: 2013-12-31
Filing date: 2013-12-31
Publication date: 2015-07-09

Abstract

The present invention relates to a position sensing device capable of sensing a position and an angle of an object, the position sensing device comprising: a light emitting element for emitting detection light to a first object; A first light receiving portion having a first light receiving region of a first light receiving range angle with respect to a first light receiving axis so as to receive reflected light reflected from the first object; And a second light receiving portion having a second light receiving region of a second light receiving range angle based on a second light receiving axis intersecting at an angle of intersection with the first light receiving axis so as to receive reflected light reflected from the first object can do.

Description

[0001] The present invention relates to a position sensing apparatus,

The present invention relates to a position sensing apparatus, and more particularly, to a position sensing apparatus capable of sensing a position and an angle of an object.

In general, non-contact sensors have been developed that enable the detection of the position and angle of an object using cameras or various non-contact optical sensors. For example, motion recognition can be implemented using an image sensor (camera), and the image sensor extracts a plurality of images and performs image processing in the motion recognition process.

Patent Publication No. 10-2013-0025540 (March 3, 2013)

However, the conventional non-contact type sensors can only measure the relative value using the intensity of the signal, so that the height value of the object, that is, the position value in the Z-axis direction can not be accurately determined.

Further, when the number of objects is two or more, since the position of the object is calculated only by the sum of the reflected light, it can not be judged only as one object or each object can be accurately determined.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems, and it is an object of the present invention to provide an image pickup apparatus and an image pickup apparatus in which a plurality of light receiving units are arranged in an array form and at least one light receiving unit measures an angle indicating a height value of the object, And it is an object of the present invention to provide a position sensing device capable of accurately determining the position of each of a plurality of objects. However, these problems are exemplary and do not limit the scope of the present invention.

According to an aspect of the present invention, there is provided a position sensing apparatus including: a light emitting element for emitting detection light to a first object; A first light receiving portion having a first light receiving region of a first light receiving range angle with respect to a first light receiving axis so as to receive reflected light reflected from the first object; And a second light receiving portion having a second light receiving region of a second light receiving range angle based on a second light receiving axis intersecting at an angle of intersection with the first light receiving axis so as to receive reflected light reflected from the first object can do.

Further, according to an aspect of the present invention, a portion of the first light receiving region of the first light receiving portion and a portion of the second light receiving region of the second light receiving portion may overlap with each other.

According to an aspect of the present invention, the light emitting element may be an infrared LED having an emission axis in a direction passing the intersection of the first light receiving axis and the second light receiving axis.

According to an aspect of the present invention, there is provided a light emitting device, further comprising a body formed by a horizontal part and a vertical part and bent at an angle of 90 degrees as a whole, The first light receiving portion may be provided on the inner side of the horizontal portion of the body and the second light receiving portion may be provided on the inner side of the vertical portion of the body.

According to an aspect of the present invention, there is provided a position sensing apparatus comprising: a first light receiving unit that receives position and angle signals of the first object from the first light receiving unit and outputs position information of the first object; And a height calculating unit for calculating a height value of the first object using a trigonometric function based on the position and angle signals of the first object.

According to another aspect of the present invention, there is provided a position sensing device for receiving a position and an angle signal of the first object from the first light receiving unit and outputting positional information of the first object, And outputs the position information of the second object when the position information of the first object and the position information of the second object are out of the reference range, And a multi-position recognition unit for outputting a multi-position value recognized as being separated from each other.

In addition, the position sensing device according to the present invention may further include a third light receiving portion that receives the third light receiving portion of the third light receiving range angle with respect to the third light receiving portion intersecting the first light receiving portion at an intersecting angle so as to receive the reflected light reflected from the first object. And a third light receiving portion having a third light receiving region.

In addition, the position sensing device according to the present invention may further include a third light receiving portion that receives the third light receiving portion of the third light receiving range angle with respect to the third light receiving portion intersecting the first light receiving portion at an intersecting angle so as to receive the reflected light reflected from the first object. A third light receiving portion having a third light receiving region; And a fourth light receiving portion having a fourth light receiving region of a fourth light receiving range angle with respect to a fourth light receiving axis intersecting at an angle of intersection with the first light receiving axis so as to receive the reflected light reflected from the first object .

According to an aspect of the present invention, the first light receiving portion may include first barrier ribs having a height at which a light passing amount can be changed according to at least an angle, and having a plurality of first slits arranged in parallel in a first direction A first photodiode capable of sensing a light amount of a first region shifted to one side of light passing between the first slits and a light amount of a second region shifted to the other side; And a plurality of second slits provided in parallel with the first photodiodes and having a height at which a light passing amount can be changed according to at least an angle and arranged in parallel in a second direction, And a second photodiode capable of detecting the amount of light in the third region shifted to one side of the light passing through the two slits and the amount of light in the fourth region shifted to the other side.

According to an aspect of the present invention, the first photodiode may be provided below the first partition walls, and may be disposed offset toward one side with respect to a center line of each of the first slits, A first eccentric array for outputting a signal; And a second eccentric array provided below the first partitions and biased toward the other side with respect to a center line of each of the first slits and outputting a signal of different intensity according to the amount of light.

According to some embodiments of the present invention as described above, it is possible to more accurately determine the height value of an object, and when the user performs a multi-operation such as opening or closing a finger, It is possible to accurately judge even in a non-contact manner and enable multi-command input such as zoom in and zoom out. Of course, the scope of the present invention is not limited by these effects.

1 is a perspective view illustrating a position sensing device in accordance with some embodiments of the present invention.
2 is a cross-sectional view of the position sensing apparatus of FIG.
3 is a conceptual diagram of the position sensing apparatus of FIG.
4 is a plan view showing a first light receiving unit of the position sensing apparatus of FIG.
FIG. 5 is a cross-sectional view conceptually showing a VV cut surface of the first light receiving portion of FIG. 4;
6 is a cross-sectional view conceptually showing a VI-VI cut plane of the first light receiving portion in Fig.
FIGS. 7 and 8 are cross-sectional views illustrating the operation of the position sensing apparatus of FIG. 1. FIG.
9 is a perspective view showing a position sensing device according to some other embodiments of the present invention.
10 is a perspective view showing a position sensing apparatus according to still another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The embodiments of the present invention are described in order to more fully explain the present invention to those skilled in the art, and the following embodiments may be modified into various other forms, The present invention is not limited to the embodiment. Rather, these embodiments are provided so that this disclosure will be more thorough and complete, and will fully convey the concept of the invention to those skilled in the art. In the drawings, the thickness and size of each layer are exaggerated for convenience and clarity of explanation.

It is to be understood that throughout the specification, when an element such as a film, region or substrate is referred to as being "on", "connected to", "laminated" or "coupled to" another element, It will be appreciated that elements may be directly "on", "connected", "laminated" or "coupled" to another element, or there may be other elements intervening therebetween. On the other hand, when one element is referred to as being "directly on", "directly connected", or "directly coupled" to another element, it is interpreted that there are no other components intervening therebetween do. Like numbers refer to like elements. As used herein, the term "and / or" includes any and all combinations of one or more of the listed items.

Although the terms first, second, etc. are used herein to describe various elements, components, regions, layers and / or portions, these members, components, regions, layers and / It is obvious that no. These terms are only used to distinguish one member, component, region, layer or section from another region, layer or section. Thus, a first member, component, region, layer or section described below may refer to a second member, component, region, layer or section without departing from the teachings of the present invention.

Also, relative terms such as "top" or "above" and "under" or "below" can be used herein to describe the relationship of certain elements to other elements as illustrated in the Figures. Relative terms are intended to include different orientations of the device in addition to those depicted in the Figures. For example, if the element is inverted in the figures, the elements depicted as being on the upper surface of the other elements will have a direction on the lower surface of the other elements. Thus, the example "top" may include both "under" and "top" directions depending on the particular orientation of the figure. If the elements are oriented in different directions (rotated 90 degrees with respect to the other direction), the relative descriptions used herein can be interpreted accordingly.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a," "an," and "the" include singular forms unless the context clearly dictates otherwise. Also, " comprise "and / or" comprising "when used herein should be interpreted as specifying the presence of stated shapes, numbers, steps, operations, elements, elements, and / And does not preclude the presence or addition of one or more other features, integers, operations, elements, elements, and / or groups.

Hereinafter, embodiments of the present invention will be described with reference to the drawings schematically showing ideal embodiments of the present invention. In the figures, for example, variations in the shape shown may be expected, depending on manufacturing techniques and / or tolerances. Accordingly, the embodiments of the present invention should not be construed as limited to the particular shapes of the regions shown herein, but should include, for example, changes in shape resulting from manufacturing.

1 is a perspective view illustrating a position sensing device 100 in accordance with some embodiments of the present invention. 2 is a sectional view of the position sensing apparatus 100 of FIG. 1, and FIG. 3 is a conceptual view of the position sensing apparatus 100 of FIG.

1 to 3, the position sensing apparatus 100 according to some embodiments of the present invention may include a light emitting device 20 and a light receiving unit 30.

For example, the light emitting device 20 and the light receiving unit 30 may be installed on the body 10 or the substrate 11. The body 10 may be a structure having appropriate strength and durability to support the light emitting device 20 and the light receiving unit 30. [ The light emitting device 20 and the light receiving unit 30 may be understood to be mounted on the substrate 11. The substrate 11 may be a rod-shaped structure formed in the lower part of the body 10 in the longitudinal direction. In such a case, the body 10 may be several separate structures rather than a single structure.

In this embodiment, the body 10 and the substrate 11 are separately described, but in the modified example of this embodiment, either the body 10 or the substrate 11 is omitted or the body 10 and the substrate 11 11 may be combined to form a body 10.

In this embodiment, the body 10 may be formed by a 90-degree angle formed by the horizontal portion 10-1 and the vertical portion 10-2.

Also, the substrate 11 may be bent at 90 degrees along the body 10. 1 and 2, the substrate 11 may be formed of a material having a suitable mechanical strength and an insulating property to support the light emitting device 20 and the light receiving unit 30, Can be produced.

More specifically, for example, the substrate 11 may be a printed circuit board (PCB) having a plurality of epoxy resin sheets formed thereon. In addition, the substrate 11 may be a Flexible Printed Circuit Board (FPCB) made of a flexible material.

In addition, the substrate 11 may be a synthetic resin substrate such as resin or glass epoxy, or a ceramic substrate in consideration of thermal conductivity. The substrate 11 may be formed by partially or wholly selecting at least one of EMC (Epoxy Mold Compound), PI (polyimide), ceramic, graphene, glass synthetic fiber and combinations thereof in order to improve workability Lt; / RTI >

In addition, the substrate 11 may include a lead frame having a first electrode on one side and a second electrode on the other side based on the electrode separation space. For example, the substrate 11 may be a metal substrate such as an insulated aluminum, copper, zinc, tin, lead, gold, silver, or the like, and may be a plate or a lead frame.

The light emitting device 20 is mounted on the inner inclined portion 10-3 inclined at an angle of 45 degrees between the horizontal portion 10-1 and the vertical portion 10-2 of the body 10 And may be a light emitting member which irradiates the detection light DL to the first object 1 or the second object 2. [

More specifically, for example, the light emitting device 20 may be an infrared LED (Light Emitting Diode) installed at a bent portion in the middle of the body 10 and having a light emitting axis C inclined at 45 degrees have. However, the light emitting device 20 is not limited to the infrared LED.

That is, the light emitting device 20 may be made of a semiconductor, as shown in FIGS. For example, LEDs emitting blue, green, red, and yellow light, and LEDs emitting ultraviolet light or infrared light, which are made of a nitride semiconductor, can be applied. The nitride semiconductor is represented by a general formula Al _x Ga _y In _z N (0? X? 1, 0? Y? 1, 0? Z? 1, x + y + z = 1).

The light emitting device 20 can be formed by epitaxially growing nitride semiconductors such as InN, AlN, InGaN, AlGaN, and InGaAlN on a sapphire substrate for growth or a silicon carbide substrate by a vapor phase growth method such as MOCVD To grow. The light emitting device 20 may be formed using semiconductors such as ZnO, ZnS, ZnSe, SiC, GaP, GaAlAs, and AlInGaP in addition to the nitride semiconductor. These semiconductors can be stacked in the order of an n-type semiconductor layer, a light emitting layer, and a p-type semiconductor layer. The light emitting layer (active layer) may be a laminated semiconductor having a multiple quantum well structure or a single quantum well structure or a laminated semiconductor having a double hetero structure. In addition, the light emitting device 20 can be selected to have an arbitrary wavelength depending on the application such as display use and illumination use.

Here, as the growth substrate, an insulating, conductive or semiconductor substrate may be used if necessary. For example, the growth substrate may be sapphire, SiC, Si, MgAl 2 O 4, MgO, LiAlO 2, LiGaO 2, GaN. A GaN substrate, which is a homogeneous substrate, is preferable for epitaxial growth of a GaN material, but a GaN substrate has a problem of high production cost due to its difficulty in manufacturing.

Sapphire and silicon carbide (SiC) substrates are mainly used as the different substrates. Sapphire substrates are more utilized than expensive silicon carbide substrates. When using a heterogeneous substrate, defects such as dislocation are increased due to the difference in lattice constant between the substrate material and the thin film material. Also, due to the difference in the thermal expansion coefficient between the substrate material and the thin film material, warping occurs at a temperature change, and warping causes a crack in the thin film. This problem may be reduced by using a buffer layer between the substrate and the GaN-based light emitting laminate.

In addition, the substrate for growth may be completely or partially removed or patterned in order to improve the optical or electrical characteristics of the LED chip before or after the growth of the LED structure.

For example, in the case of a sapphire substrate, the substrate can be separated by irradiating the laser to the interface with the semiconductor layer through the substrate, and the silicon or silicon carbide substrate can be removed by a method such as polishing / etching.

Another supporting substrate may be used for removing the growth substrate. In order to improve the light efficiency of the LED chip on the opposite side of the growth substrate, the supporting substrate may be bonded using a reflective metal, As shown in FIG.

In addition, patterning of the growth substrate improves the light extraction efficiency by forming irregularities or slopes before or after the LED structure growth on the main surface (front surface or both sides) or side surfaces of the substrate. The size of the pattern can be selected from the range of 5 nm to 500 μm and it is possible to make a structure for improving the light extraction efficiency with a rule or an irregular pattern. Various shapes such as a shape, a column, a mountain, a hemisphere, and a polygon can be adopted.

In the case of the sapphire substrate, the crystals having a hexagonal-rhombo-cubic (Hexa-Rhombo R3c) symmetry have lattice constants of 13.001 and 4.758 in the c-axis direction and the a-axis direction, respectively, and have C plane, A plane and R plane. In this case, the C-plane is relatively easy to grow the nitride film, and is stable at high temperature, and thus is mainly used as a substrate for nitride growth.

Another material of the growth substrate is a Si substrate, which is more suitable for large-scale curing and relatively low in cost, so that mass productivity can be improved.

In addition, since the silicon (Si) substrate absorbs light generated from the GaN-based semiconductor and the external quantum efficiency of the light emitting device is lowered, the substrate may be removed as necessary, and Si, Ge, SiAl, A support substrate such as a metal substrate is further formed and used.

When a GaN thin film is grown on a different substrate such as the Si substrate, the dislocation density increases due to the lattice constant mismatch between the substrate material and the thin film material, and cracks and warpage Lt; / RTI > The buffer layer may be disposed between the growth substrate and the light emitting stack for the purpose of preventing dislocation and cracking of the light emitting stack. The buffer layer also functions to reduce the scattering of the wavelength of the wafer by adjusting the degree of warping of the substrate during the growth of the active layer.

Here, the buffer layer may be made of Al _x In _y Ga _1-xy N (0? X? 1, 0? _Y? 1, x + y? 1), in particular GaN, AlN, AlGaN, InGaN or InGaNAlN. Materials such as ZrB2, HfB2, ZrN, HfN and TiN can also be used as needed. Further, a plurality of layers may be combined, or the composition may be gradually changed.

Although not shown, the light emitting device 20 may be in the form of a flip chip having a signal transmitting medium such as a bump, a pad, or a solder. In addition, the first and second terminals The light emitting elements to which the bonding wire is applied, or to which the bonding wire is applied to only the first terminal or the second terminal partially can all be applied.

One or more light emitting devices 20 may be provided on the body 10 or the substrate 11 or a plurality of the light emitting devices 20 may be mounted on the body 10 or the substrate 11.

In addition, the light emitting device 20 can be applied to all types of light emitting devices such as various lamps such as an infrared lamp, an ultraviolet lamp, a fluorescent lamp, and a bulb.

1, the light receiving unit 30 includes a plurality of arrays arranged in the body 10 or the substrate 11, and includes a first light receiving unit 31 and a second light receiving unit 32 ).

More specifically, for example, as shown in FIGS. 1 to 3, the first light receiving portion 31 is provided on the inner surface of the horizontal portion 10-1 of the body 10, 7 and 8 reflected from the object 1 or the second object 2 so as to receive the first reflected light L1 or the second reflected light L2 May be a light receiving member having a first light receiving area A1 of the first light receiving range angle K1.

2, the second light receiving portion 32 is provided on an inner surface of the vertical portion 10-2 of the body 10, and the second light receiving portion 32 is provided on the inner surface of the vertical portion 10-2 of the body 10, 1 crossing at an intersection angle K3 of 90 with the first light receiving axis C1 so as to receive the second reflected light L2 or the first reflected light L1 reflected from the object 1, Receiving area A2 of the second light receiving range angle K2 on the basis of the second light receiving area A2.

1 and 2, a portion of the first light receiving region A1 of the first light receiving section 31 and a portion of the second light receiving region A2 of the second light receiving section 32 May be an overlap area A3 overlapping each other.

Here, the light emitting device 20 may be an infrared LED having an emission axis C in a direction passing the intersection P between the first light receiving axis C1 and the second light receiving axis C2.

1 and 2, the light emitting device 20 includes the first light receiving region A1 of the first light receiving section 31 and the second light receiving region A1 of the second light receiving section 32, The first light receiving portion 31 may be provided at a 45 degree angle to the bent middle portion of the body 10 so that the detection light DL can be uniformly irradiated to the light receiving region A2. And the second light receiving portion 32 is vertically installed on the inner side surface of the horizontal portion 10-1 of the body 10 so that the calculation can be easily performed. And can be installed horizontally on the inner side.

However, the positions of the light emitting device 20, the first light receiving unit 31 and the second light receiving unit 32 are not limited to this, and may be, for example, the first light receiving unit 31, The optical axis C1 and the second light receiving axis 32 of the second light receiving portion 32 may be provided at an intersection angle K3 of 60 degrees or may be provided at a crossing angle K3 of the light emitting element 20, The second light receiving portion 32 may be triangularly arranged to form a triangle.

The mounting position and shape of the light emitting element 20 and the first and second light receiving portions 31 and 32 may be changed depending on the shape of the body 10, It can therefore vary greatly.

Also, the shape of the body 10 is not limited to the shape bent at 90 degrees, but various types of structures bent at various angles can be applied.

3, the position sensing apparatus 100 according to some embodiments of the present invention may further include a height calculating unit 40 and a multi-position recognizing unit 50. [

More specifically, for example, the height calculating unit 40 receives the position and angle signal of the first object 1 from the first light receiving unit 31 so as to measure a more accurate height of the object, Outputs the position information of the first object 1 and receives the position and angle signal of the second object 2 from the second light receiving portion 32 and outputs the position information of the second object 2, When the positional information of the first object 1 and the positional information of the second object 2 come close to each other within a reference range, the height of the first object 1 and the second object 2 It may be a microprocessor, circuit, or program that computes a value.

Here, the trigonometric function refers to the case where a coordinate system having X and Y axes is drawn with O as an origin on a plane, and then an event connecting the point having the coordinate of the coordinate system with the origin and the angle of the sine, cosine, tangent, secant, For example, when the distance between the first light receiving unit 31 and the second light receiving unit 32 is known and the angle of the object is known, the height of the object can be accurately calculated.

Accordingly, since the intensity of the reflected light reflected from the surface of the object can be varied depending on the state of the surface, conventionally, only the intensity of the reflected light reflected from the object is used to estimate the height of the object inaccurately, The height of the object can be calculated very accurately through the trigonometric function using the position sensing apparatus 100. [

The multi-position recognition unit 50 receives the position and angle signal of the first object 1 from the first light receiving unit 31, outputs the position information of the first object 1, Receives the position and angle signal of the second object (2) from the second light receiving unit (32), outputs the position information of the second object (2), and outputs the position information of the first object A microprocessor, a circuit, or a program that outputs a multi-position value that recognizes that the first object 1 and the second object 2 are separated from each other when the position information of the object 2 is out of the reference range have.

For example, the case where the positional information of the first object 1 and the positional information of the second object 2 are out of the reference range means that the first object 1 measured by the first light- The first light receiving unit 31 and the second light receiving unit 32 are arranged such that when the intersection angle K3 between the angle line of the first light receiving unit 31 and the angle line of the second light receiving unit 32 measured by the second light receiving unit 32 is small, The intensity of the signal received at the receiver should be reduced, but the intensity of the signal may be stronger rather than decreased.

3, the height calculating unit 40 and the multi-position recognizing unit 50 may be installed on the body 10, and the height calculating unit 40 and the multi- The multi-position recognition unit 50 may be included in any type of information terminal 60 that can be connected to the position sensing apparatus 100 of the present invention in the form of a separate microprocessor, circuit, or program.

In addition, the height calculating unit 40 and the multi-position recognizing unit 50 are a kind of control device capable of outputting a position signal according to a sensing region of the object according to a signal sensed by the light receiving unit 30, Various types of electronic components such as various circuits, a microprocessor, a semiconductor device, a computer, an arithmetic unit, a calculator, an MCU (Machine Control Unit), and a CPU (Central Processing Unit).

4 is a plan view showing the first light receiving section 31 of the position sensing apparatus 100 of FIG. 5 is a cross-sectional view conceptually showing a V-V cut plane of the first light receiving unit 31 of Fig. 4, and Fig. 6 is a cross-sectional view conceptually showing a VI-VI cut plane of the first light receiving unit 31 of Fig.

4, the first light receiving unit 31 of the position sensing apparatus 100 according to some embodiments of the present invention can receive the reflected light L1 reflected from the object by the detection light And may be, for example, a photodiode.

The photodiode may be a kind of optical sensor that converts optical energy into electrical energy to obtain an electrical signal (current or voltage) from the optical signal, and may be a semiconductor device provided with a photodetection function at the junction of the diode.

Here, the photodiode basically utilizes the principle that the conductivity of the diode is modulated in accordance with the optical signal by generating excess electrons or holes by photon absorption. That is, the current of the photodiode essentially varies with the optical generation rate of the carrier, and this characteristic can provide a useful device for converting an optical signal that changes over time into an electrical signal.

4, the first light receiving portion 31 using the photodiode includes an X-axis sensor 31-1 capable of sensing an angle of the object in the X-axis direction, And a Y-axis sensor 31-2 capable of sensing the angle of the Y-axis direction of the M-axis.

More specifically, for example, the X-axis sensor 31-1 may include a first photodiode PD1, the Y-axis sensor 31-2 may include a second photodiode PD2, . &Lt; / RTI >

5, the first photodiode PD1 includes a plurality of first photodiodes PD1 and a plurality of first photodiodes PD1, each having a height H at which light passing through the photodiode PD1 varies in accordance with an angle, It is possible to detect the amount of light of the first area shifted to one side of the light passing between the first slits S1 and the amount of light of the second area shifted to the other side using the first partitions W1 having the slits S1 Lt; RTI ID = 0.0 > photodiodes. &Lt; / RTI >

Also, as shown in FIG. 5, the first photodiode PD1 may include a first eccentric array PD1a and a second eccentric array PD1b.

The first eccentric array PD1a is installed below the first partition walls W1 and biased to one side with respect to the center line CL of each of the first slits S1, It is possible to output signals of different intensities according to the amount of light.

The second eccentric array PD1b is provided below the first partition W1 and is disposed to be offset toward the other side with respect to the center line CL of each of the first slits S1, A signal of a different intensity can be output.

5, when the reflected light L1 reflected from the object passes through a plurality of the first slits S1 at an angle shifted to one side, the first partition W1, A relatively larger amount of light can reach the second eccentric array PD1b provided on the other side than the first eccentric array PD1a installed on one side.

That is, as the angle of the reflected light L1 reflected from the object is shifted to one side, a greater amount of light can be output to the second eccentric array PD1b than to the first eccentric array PD1a .

Therefore, the determining unit 30, which will be described later, can determine the X-axis angle of the object using the output difference of the relative electrical signals of the first eccentric array PD1a and the second eccentric array PD1b.

6, the second photodiode PD2 includes a plurality of second photodiodes PD1, PD2, PD3, PD4, PD6, PD7, PD6, PD7, The amount of light of the first region shifted to one side of the light passing between the second slits S2 and the amount of light of the second region shifted toward the other side are detected using the second partitions W2 having the slits S2 Lt; RTI ID = 0.0 > photodiodes. &Lt; / RTI >

Also, as shown in FIG. 4, the second photodiode PD2 may include a first eccentric array PD2a and a second eccentric array PD2b.

The first eccentric array PD2a is installed below the second partition walls W2 and is biased to one side with respect to the center line CL of each of the second slits S2, It is possible to output signals of different intensities according to the amount of light.

The second eccentric array PD2b is installed below the second partition walls W2 and is biased to the other side with respect to the center line CL of each of the second slits S2, A signal of a different intensity can be output.

4, when the reflected light L1 reflected from the object passes through a plurality of the second slits S2 at an angle shifted to one side, the second partition W2, A relatively larger amount of light can reach the second eccentric array PD2b provided on the other side than the first eccentric array PD2a provided on one side.

That is, as the angle of reflected light L1 reflected from the object is shifted to one side, a greater amount of light can be output to the second eccentric array PD2b than to the first eccentric array PD2a .

Therefore, the determination unit 30 to be described later determines the Y-axis angle of the object M using the output difference of the relative electrical signals of the first eccentric array PD2a and the second eccentric array PD2b .

The angle of the object can be finally calculated by summing the X-axis angle and the Y-axis angle of the object thus determined.

FIGS. 7 and 8 are cross-sectional views illustrating the operation of the position sensing apparatus 100 of FIG.

7 and 8, the operation of the position sensing apparatus 100 according to some embodiments of the present invention will be described. First, as shown in FIG. 7, the first light receiving unit (Approximately 0 degrees) of the first object 1 and the angle line (approximately 90 degrees) of the second object 2 measured by the second light-receiving portion 32 are intersected with each other , And determines that the position information of the first object (1) and the position information of the second object (2) are close to each other within the reference range using the height calculation unit (40) The accurate height values of the first object 1 and the second object 2 can be calculated using the trigonometric function.

8, the angle line of the first object 1 measured at the first light receiving portion 31 and the angle line of the second object 2 measured at the second light receiving portion 32 When the intensity of a signal received by the first light receiving unit 31 and the second light receiving unit 32 is reduced to decrease the intersection angle and the intensity of the signal is intensified rather than decreasing, The first object 1 and the second object 2 determine that the position information of the first object 1 and the position information of the second object 2 are out of the reference range, It is possible to output multiple position values which are recognized as being separated.

Therefore, when the user performs a multi-operation such as opening a finger, or the like, it is possible to accurately determine the position of each finger to a plurality of points and input a multi-command such as zooming in or zooming out.

9 is a perspective view illustrating position sensing device 200 in accordance with some other embodiments of the present invention.

9, the position sensing apparatus 200 according to some other embodiments of the present invention includes the body 10 in addition to the first light receiving section 31 and the second light receiving section 32 described above. (C1) so as to receive the first reflected light (L1) or the second reflected light (L2) reflected from the first object (1) or the second object (2) And a third light receiving portion 33 having a third light receiving region of a third light receiving range angle with reference to a third light receiving axis C3 having a third light receiving portion 33a.

The first light receiving unit 31, the second light receiving unit 32, and the third light receiving unit 33 (refer to FIG. 1) are disposed on the basis of the light emitting device 20 in order to facilitate calculation of the trigonometric function or multi- May be equally spaced at an angle of 120 degrees.

Therefore, the position sensing apparatus 200 according to some other embodiments of the present invention may use the first light receiving unit 31 and the three light receiving units of the second light receiving unit 32 and the third light receiving unit 33 It is possible to recognize the multi-position in all the angles in the front-rear direction as well as in the left-right direction. The number of the light-receiving portions to be installed is not limited to the above-described two and three.

10 is a perspective view illustrating a position sensing device 300 in accordance with some further embodiments of the present invention.

14, the position sensing apparatus 300 according to still another embodiment of the present invention includes the body 10 (not shown) in addition to the first light receiving section 31 and the second light receiving section 32 described above, (L1) or the second reflected light (L2) reflected from the first object (1) or the second object (2) so as to receive the first reflected light A third light receiving portion 33 having a third light receiving region of a third light receiving range angle with reference to a third light receiving axis C3 having an angle and a third light receiving portion 33 provided on the body 10, (4) having an angle of intersection with the first light receiving axis (C1) so as to receive the first reflected light (L1) or the second reflected light (L2) reflected from the object (2) And a fourth light receiving portion 34 having a fourth light receiving region of a light receiving range angle of four.

Here, the first light receiving unit 31, the second light receiving unit 32, and the third light receiving unit (not shown) are disposed on the basis of the light emitting device 20 so that calculation of the trigonometric function or multi- 33 and the fourth light receiving portion 34 may be equiangularly arranged at an angle of 90 degrees.

Therefore, the position sensing apparatus 300 according to some other embodiments of the present invention may include the first light receiving unit 31, the second light receiving unit 32, the third light receiving unit 33, (34) Using the total of four light receiving units, it is possible to recognize more precise multiple positions at all angles in the front-rear direction as well as in the left-right direction. In addition, the number of the light-receiving portions, the mounting position and the arrangement of the light-receiving portions can be optimized according to the shape and type of the object, the shape and the environment of the sensing region, and the like.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

1: first object
2: second object
10: Body
10-1:
10-2:
10-3: Inner inclined portion
11: substrate
20: Light emitting element
30:
31: First light receiving section
32: second light receiving section
33: Third light receiving section
34: Fourth light receiving section
40: height calculating section
50: Multiple position recognition unit
60: Information terminal
100: Position sensing device

Claims

A light emitting element for emitting detection light to the first object;
A first light receiving portion provided on the body and having a first light receiving region of a first light receiving range angle with respect to a first light receiving axis so as to receive reflected light reflected from the first object; And
A second light receiving portion having a second light receiving region of a second light receiving angle range with respect to a second light receiving axis intersecting with the first light receiving axis so as to receive reflected light reflected from the first object;
The position sensing device.

The method according to claim 1,
Wherein a part of the first light receiving area of the first light receiving part and a part of the second light receiving area of the second light receiving part overlap each other.

The method according to claim 1,
Wherein the light emitting element is an infrared LED having an emission axis in a direction passing the intersection of the first light receiving axis and the second light receiving axis.

The method according to claim 1,
Further comprising a body of a shape bent at an angle of 90 degrees as a whole consisting of a horizontal portion and a vertical portion,
Wherein the light emitting device is installed at an inner inclined portion inclined at an angle of 45 degrees between the horizontal portion and the vertical portion of the body,
The first light receiving portion is installed on an inner surface of a horizontal portion of the body,
And the second light receiving portion is provided on an inner surface of a vertical portion of the body.

The method according to claim 1,
Receiving a position and an angle signal of the first object from the first light receiving unit, outputting position information of the first object, receiving a position and an angle signal of the first object from the second light receiving unit, A height calculating unit for calculating a height value of the first object;
The position sensing device further comprising:

The method according to claim 1,
Receiving the position and angle signal of the first object from the first light receiving unit and outputting the position information of the first object, receiving the position and angle signal of the second object from the second light receiving unit, And outputting a multi-position value recognizing that the first object and the second object are separated from each other when the position information of the first object and the position information of the second object are out of a reference range, A position recognition unit;
The position sensing device further comprising:

The method according to claim 1,
A third light receiving portion having a third light receiving region of a third light receiving range angle based on a third light receiving axis intersecting with the first light collecting axis so as to receive the reflected light reflected from the first object;
The position sensing device further comprising:

The method according to claim 1,
A third light receiving portion having a third light receiving region of a third light receiving range angle based on a third light receiving axis intersecting with the first light collecting axis so as to receive the reflected light reflected from the first object; And
A fourth light receiving portion having a fourth light receiving region of a fourth light receiving range angle with respect to a fourth light receiving axis intersecting at an angle of intersection with the first light receiving axis so as to receive the reflected light reflected from the first object;
The position sensing device further comprising:

The method according to claim 1,
Wherein the first light-
A first partition wall having a height at which a light passing amount can be changed according to at least an angle and having a plurality of first slits arranged in parallel in a first direction is used to bias the light passing through between the first slits A first photodiode capable of sensing a light amount of a first region and a light amount of a second region shifted toward the other side; And
And a plurality of second slits arranged in parallel with the first photodiodes and having a height at which a light passing amount can be changed according to at least an angle and arranged in parallel in a second direction, A second photodiode capable of sensing a light amount of a third region shifted to one side of the light passing through the slits and a light amount of a fourth region shifted to the other side;
The position sensing device.

10. The method of claim 9,
Wherein the first photodiode comprises:
A first eccentric array disposed below the first partitions and biased to one side with respect to a center line of each of the first slits and outputting a signal having a different intensity according to an amount of light; And
And a second eccentric array which is installed below the first partitions and biased toward the other side with respect to a center line of each of the first slits and outputs a signal of different intensity according to the amount of light, .