KR20140053576A - Distance detecting device and image processing apparatus including the same - Google Patents

Abstract

The present invention relates to a distance detecting device and image processing apparatus including the same. According to an embodiment of the present invention, the distance detecting device comprises a light source unit for outputting output lights; a scanner for outputting the output lights to the external area by successively performing a first direction scanning and a second direction scanning; a detecting unit for converting the output lights from the light source unit into a first electric signal in a first scanning section corresponding to a first area among external areas during the scanning process and for converting reception lights received from the outside into a second electric signals corresponding to the output lights in a second scanning section corresponding to a second area among the external areas; a sampler for outputting a first or a second sampling signal by sampling the first or second electric signal from the detection unit; and a processor for detecting a distance for an object outside using a first status value based on the first sampling signal and a second status value based on the second sampling signal. By using the present invention, a distance for an object outside can be accurately detected.

Description

[0001] The present invention relates to a distance detecting apparatus and an image processing apparatus including the same,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distance detection apparatus and an image processing apparatus having the same, and more particularly, to a distance detection apparatus and an image processing apparatus having the same that can accurately detect a distance to an external object.

There is an increasing demand for measuring the distance to an external object. Particularly, there is an increasing demand to view a 3D image, that is, a stereoscopic image, in addition to a 2D image when viewing an image. In order to detect the depth of the 3D image, a distance to an external object can be detected. As described above, various methods have been attempted as a method of detecting a distance to an external object.

An object of the present invention is to provide a distance detection apparatus capable of accurately detecting a distance to an external object and an image processing apparatus having the same.

According to an aspect of the present invention, there is provided a distance detecting apparatus including a light source for outputting an output light, a scanner for sequentially performing a first direction scanning and a second direction scanning, And a first scanning section corresponding to the first area of the outer area during the scanning operation of the scanner converts the output light from the light source section into a first electrical signal and a second scanning section corresponding to the second area A sampling unit for sampling the first or second electrical signal from the detection unit and outputting a first or a second sampling signal, And a processor for detecting a distance to an external object using a first phase value based on the first sampling signal and a second phase value based on the second sampling signal.

According to another aspect of the present invention, there is provided a distance detection apparatus including a light source for outputting light, a light source for driving the light source by a first electrical signal, A scanner that sequentially performs scanning to output the output light to an outside area; a detecting unit that converts a received light received from the outside in response to the output light into a second electrical signal; A switching section for outputting a first electrical signal in a first scanning section corresponding to one area and a second scanning section for outputting a second electrical signal in a second scanning section corresponding to a second area of the outside area, And a second phase value based on the first sampling signal and a second phase value based on the second sampling signal, wherein the first or second sampling means samples a first or second electrical signal, By, and a processor for detecting a distance to an external object.

According to another aspect of the present invention, there is provided a distance detecting apparatus including a light source for outputting an output light, a first detector for converting output light into a first electrical signal, A second detector for converting the received light received from the outside into a second electrical signal corresponding to the output light, and a second detector for detecting an outside of the scanner during the scanning operation of the scanner, A switching unit for outputting a first electrical signal in a first scanning period corresponding to a first area of the area and a second electrical signal in a second scanning area corresponding to a second area of the outside area, A first and a second sampling means for sampling the first or second electric signal of the rotor and outputting a sampling signal; a first phase value based on the first sampling signal; and a second phase value based on the second sampling signal Use And a processor for detecting a distance to an external object.

According to another aspect of the present invention, there is provided an image processing apparatus including a display, a light source for outputting output light, a first direction scanning and a second direction scanning, And a first scanning section corresponding to the first area of the external area during the scanning operation of the scanner converts the output light from the light source section into a first electrical signal and corresponds to the second area of the outside area A first scanning section for sampling the first or second electrical signal from the detecting section and for outputting a first or a second sampling signal, Detecting a distance to an external object using a first phase value based on the first sampling signal and a second phase value based on the second sampling signal, And a control unit for controlling the display unit to display the 3D image on the display by using the distance information detected by the distance detecting unit.

According to another aspect of the present invention, there is provided an image processing apparatus including a display, a light source for outputting light, a light source for driving the light source by a first electric signal, A scanner for sequentially outputting the output light to the external area by sequentially performing the first direction scanning and the second direction scanning, a detector for converting the received light received from the outside into a second electrical signal corresponding to the output light, A switching unit for outputting a first electrical signal in a first scanning period corresponding to a first area of the area and a second electrical signal in a second scanning area corresponding to a second area of the outside area, And a sampler for sampling the first or second electric signal of the rotor and outputting a first or a second sampling signal, wherein the first phase value based on the first sampling signal and the second phase value based on the second sampling signal Using chohan second phase values, and the distance detection unit for detecting a distance to an external object, using the distance information detected by the distance detection section, and a control unit that controls to display a 3D image on the display.

According to another aspect of the present invention, there is provided an image processing apparatus including a display, a light source for outputting light, a first detector for converting output light into a first electric signal, And a second detection unit for converting a received light received from the outside into a second electrical signal corresponding to the output light, and a second detection unit for detecting a scanning operation of the scanner A switching unit for outputting a first electrical signal in a first scanning period corresponding to the first area of the middle and outer areas and a second scanning period corresponding to the second area in the outer area, And a sampler for sampling the first or second electric signal of the switching sub-rotor and outputting the first or second sampling signal, wherein the first phase value based on the first sampling signal and the first phase value based on the second sampling signal A distance detecting unit for detecting a distance to an external object using a second phase value and a control unit for controlling the display to display the 3D image using the distance information detected by the distance detecting unit.

An image processing apparatus having a distance detecting device or a distance detecting device according to an embodiment of the present invention includes a first scanning section corresponding to a first area of an outer area and a second scanning section corresponding to a second area of the outer area, And performs sampling on each of the first electrical signal of the first scanning interval and the second electrical signal of the second scanning interval and outputs a first phase value based on the first sampling signal and a second phase value based on the second sampling signal, It is possible to accurately detect the distance to the external object by detecting the distance to the external object using the second phase value based on the second phase value.

On the other hand, when using the detector and the sampler, a timing error due to the sampler may occur. By using the first phase value corresponding to the first scanning period and the second phase value corresponding to the second scanning period, The phase difference due to the error can be corrected. Then, based on the corrected phase, an accurate distance can be detected.

On the other hand, one sampler and a shutter can be used, thereby making it possible to downsize the distance detecting device. In addition, the manufacturing cost can be reduced.

Or one sampler and a switching unit can be used, thereby making it possible to downsize the distance detecting apparatus.

On the other hand, by using a 2D scanner capable of sequentially performing the first direction scanning and the second direction scanning for the external output of the output light, a plurality of scanners are not required, and the distance detecting apparatus can be downsized. In addition, the manufacturing cost can be reduced.

On the other hand, by using a laser diode as a light source, the measurable distance can be extended and the distance resolution can be improved.

1 shows projection of light for distance detection in an image processing apparatus including a distance detection apparatus according to an embodiment of the present invention.
FIG. 2A is a diagram illustrating a scanning method at the time of light projection of the distance detection device of FIG. 1;
2B is a diagram illustrating distance information obtainable in the distance detecting apparatus of FIG.
Fig. 3 is a diagram referred to explain the distance detecting method of the distance detecting apparatus of Fig. 1;
4 is an example of the internal structure of the distance detecting device of Fig.
Figs. 5A and 5B illustrate various examples of the sampling timing of the sampler in the distance detection device. Fig.
FIG. 6 is a diagram illustrating the phase error that occurs according to the sampling timing of FIG. 5B.
7 is an internal elevational view of the distance detection device according to an embodiment of the present invention.
8 is an internal block diagram of a signal processing unit that can be disposed between the detecting unit and the sampler in Fig.
Fig. 9 is an operation timing chart of the shutter of Fig. 7; Fig.
Figs. 10A and 10B are diagrams referred to explain a method of correcting a phase in the distance detection apparatus of Fig. 7; Fig.
11A to 11C are internal convex views of a distance detection device according to various embodiments of the present invention.
12 is an internal elevational view of a distance detection device according to another embodiment of the present invention.
Fig. 13 is an operation timing chart of the switching unit of Fig. 12; Fig.
14 is an internal elevational view of a distance detection device according to another embodiment of the present invention.
15 is an internal block diagram of the mobile terminal of FIG.
16 is an internal block diagram of the control unit of Fig.

Hereinafter, the present invention will be described in detail with reference to the drawings.

The image processing apparatus described in this specification includes a mobile terminal, a TV, a set-top box, a media player, a game device, a surveillance camera, and the like, and includes an air conditioner, a refrigerator, a washing machine, A home appliance such as a robot cleaner, or a vehicle such as a bicycle or an automobile.

The mobile terminal may be a mobile phone, a smart phone, a notebook computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player), a digital camera, a navigation device, a tablet computer ), E-book terminals, and the like.

The suffix "module" and " part "for components used in the following description are given merely for convenience of description, and do not give special significance or role in themselves. Accordingly, the terms "module" and "part" may be used interchangeably.

1 shows projection of light for distance detection in an image processing apparatus including a distance detection apparatus according to an embodiment of the present invention.

Referring to the drawings, the image processing apparatus of FIG. 1 exemplifies a mobile terminal 100. As described above, the distance detecting apparatus 200 may be provided in a video processing apparatus such as a mobile terminal, a TV, a set-top box, a media player, a game machine, a household appliance, .

The mobile terminal 100 may include a camera 122 for imaging. Meanwhile, the mobile terminal 100 may include a distance detection device 200 for 3D image sensing.

A camera 122 that acquires an image of the outer region 40 and a distance detection device 200 that acquires distance information of the outer region 40 may be provided in the 3D camera 121. The 3D camera 121 may be a module, and may include a camera 122 and a distance detecting device 200 therein.

Alternatively, the camera 122 and the distance detecting device 200 may be provided in the mobile terminal 100 as separate modules.

The distance detecting apparatus 200 according to the embodiment of the present invention may use at least one light source to output an output light to the outer region 40 and to output a plurality of light beams that are scattered or reflected in the outer region 40 It is assumed that the light is received and the distance is detected using the difference between the output light and the received light.

Particularly, the distance detecting apparatus 200 according to the embodiment of the present invention corrects a sampling error that may occur when using a detector for detecting the received light and a sampler for sampling the detected electric signal, And detects the distance to the target.

Specifically, a first scanning interval corresponding to the first area of the outer area and a second scanning interval corresponding to the second area of the outer area are separated, and the first electrical signal of the first scanning interval and the second scanning interval By detecting the distance to the external object by using the first phase value based on the first sampling signal and the second phase value based on the second sampling signal, The distance to the object can be accurately detected. This will be described in detail below.

On the other hand, by using a 2D scanner which can sequentially perform the first direction scanning and the second direction scanning in outputting a plurality of external output lights, a plurality of scanners are not necessary, And it becomes possible to downsize. In addition, the manufacturing cost can be reduced. The scanner, etc., will be described with reference to Fig. 2A.

FIG. 2A is a diagram illustrating a scanning method at the time of light projection of the distance detection device of FIG. 1;

Referring to the drawings, the distance detecting apparatus 200 may include a light source 210, a light reflector 214, and a scanner 240.

On the other hand, the wavelength of light output from the distance detecting device 200 is a single light source, which can be one wavelength, but it is also possible to use light of various wavelengths. Hereinafter, the use of a single light source will be mainly described.

The light source section 210 outputs light having a predetermined wavelength as output light. Here, the output light may be an infrared wavelength light, but the present invention is not limited thereto, and various examples such as light having a wavelength of visible light are possible. In the following description, the light with an infrared wavelength is mainly described.

On the other hand, in the light source unit 210, the collimation of light is important for an external object to project light. For this purpose, a laser diode can be used, but the present invention is not limited to this, and various examples are possible.

The output light output from the light source unit 210 may be reflected by the light reflection unit 214 and may be incident on the scanner 240.

On the other hand, the scanner 240 receives the output light from the light source 210 and sequentially performs the first direction scanning and the second direction scanning sequentially and repeatedly.

As shown in the figure, the scanner 240 performs horizontal scanning from left to right with respect to the outer area 40, centering on the scannable area, vertical scanning from top to bottom, and horizontal scanning from right to left And vertical scanning can be performed again on the lower side. Then, such a scanning operation is repeatedly performed for the entirety of the outer region 40. [

On the other hand, the output light output to the outer region 40 may be scattered or reflected in the outer region 40 and then incident on the distance detection device 200 again. For example, the scanner 240 can receive the light corresponding to the output light output to the outside.

The distance detecting apparatus 200 can compare the output light and the received light, and can detect the distance by using the difference. There are various methods for the distance detection method, but in the embodiment of the present invention, a method using the phase difference is exemplified. This will be described later with reference to FIG.

On the other hand, in the distance detecting apparatus 200, the calculated distance information can be expressed as a luminance image 65 as shown in Fig. 2B. The various distance values of the external object can be displayed as corresponding luminance levels. If the distance is close, the brightness level may be large (the brightness may be bright), and if the depth is far, the brightness level may be small (the brightness may be dark).

Meanwhile, the distance detecting apparatus 200 according to the embodiment of the present invention includes a detector (280 in FIG. 4) and a sampler (285 in FIG. 4). On the other hand, when the sampler 285 is used, a timing error may occur between the driving frequency for driving the output light and the sampling frequency, thereby failing to detect an accurate phase in the distance detection method using the phase difference , Accurate distance detection may not be performed.

For this, in the embodiment of the present invention, as shown in FIG. 2A, the outer region 40 can be divided into a first region 44 and a second region 42. Here, the first region 44 may be an area that does not include the external object 50, and the second area 42 may be an area that includes the external object 50.

On the other hand, unlike the drawing, an area including only the external object 50 may be referred to as a second area. The first area 44 and the second area 42 can be divided into various areas.

Hereinafter, the first area 44 is referred to as a blank area 44 as an area not including the external object 50, and the second area 42 is referred to as a blank area 44, As an area, an active area 42 can be named.

Accordingly, the entire scanning period is also divided into a first scanning period (T _{B in} FIG. 10A) corresponding to a blank area 44, which is an area in which no external object exists, and a second scanning period (T _{A in} FIG. 10A) corresponding to the active area 42 of the first scanning area.

The phase difference due to the timing error can be corrected using the first phase value corresponding to the first scanning period and the second phase value corresponding to the second scanning period. Thus, it is possible to detect an accurate distance based on the corrected phase.

3 illustrates a method of calculating a distance by a phase difference method according to an embodiment of the present invention. Here, Tx represents the phase signal of the output light, and Rx represents the phase signal of the received light.

Referring to the drawings, the processor (270 in FIG. 4) of the distance detecting apparatus can calculate the distance information level according to the phase difference (?) Between the phase signal of the output light and the phase signal of the received light.

For example, since the outer region 40 is farther away as the phase difference is larger, the distance information level can be set to be larger. The smaller the phase difference is, the closer the outer region 40 is. .

This distance level setting is performed for each region in the outer region 40 while the outer region 40 is horizontally scanned and vertically scanned, as described above. On the other hand, the distance information level can be detected for each area of the outer area 40.

On the other hand, the processor (270 in FIG. 4) of the distance detecting device can calculate the distance information by the phase difference between the electric signal for the output light and the electric signal for the received light.

4 is an example of the internal structure of the distance detecting device of Fig.

The distance detecting apparatus 200 includes a light source unit 210, a light collecting unit 212, a first light reflecting unit 214, a scanner 240, a second light reflecting unit 255, A reflection unit 256, a detection unit 280, and a polarized light separation unit 281, a sampler 285, and a processor 270.

The light condensing unit 212 collimates the output light output from the light source unit 210. To this end, the light collecting unit 212 may include a collimate lens for collimating output light.

Then, the output light having passed through the condenser 212 passes through the polarization separator 281.

The polarized light separating section 281 transmits a part of the polarized light of the output light, and emits a part of the polarized light that is processed. For example, the polarized light separating unit 281 transmits the P polarized light output light in the direction of the scanner 240 when the P polarized light output light is out of the output light. On the other hand, the polarized light separating section 281 reflects the S-polarized state of the reflected light and transmits the S-polarized state of the received light to the detecting section 280. The polarized light separator may be a Polarizer Beam Splitter (PBS).

The first light reflection part 214 reflects the output light having passed through the polarization separation part 281 toward the scanner 240 and transmits the received light received through the scanner 240 toward the polarization separation part 281 Reflection. The first light reflection part 214 can reflect light of various wavelengths, not only the wavelength of the output light. Accordingly, the first light reflection part 214 can be provided with Total Mirror (TM).

Although not shown in the drawing, a polarization conversion unit (not shown) may be provided between the first light reflection unit 214 and the second light reflection unit 255.

The polarization conversion section (not shown) can convert the polarization direction of the output light and convert the polarization direction of the received light.

For example, the polarization conversion section (not shown) controls the polarization direction by giving a phase difference. In particular, the linearly polarized light can be converted into circularly polarized light, or the circularly polarized light can be converted into linearly polarized light.

 Specifically, the polarization conversion section (not shown) converts the P-polarized output light into the circularly polarized output light. Accordingly, the scanner 240 can output the circular polarized light output light to the outside, and receive the circularly polarized light receiving light from the outside. On the other hand, the polarization converting unit (not shown) can convert the circularly polarized light received through the scanner 240 into the S polarized light. Accordingly, the polarization conversion unit (not shown) can be named a quarter wavelength plate (QWP).

As another example, the polarization conversion unit (not shown) may output the P-polarized output light as it is, and convert the P-polarized light received from the scanner 240 into the S-polarized received light.

The second light reflection portion 255 reflects the output light from the first light reflection portion 214 toward the scanner 240 and transmits the received light received through the scanner 240 to the first light reflection portion 214 ) Direction. The second light reflection portion 255 can reflect light of various wavelengths, not only the wavelength of the output light. Accordingly, the second light reflection portion 255 may be provided with a Total Mirror (TM).

 The third light reflection portion 256 reflects the output light having passed through the second light reflection portion 255 toward the scanner 240 and transmits the received light received through the scanner 240 to the second light reflection portion 255) direction. The third light reflection portion 256 can reflect light of various wavelengths, not only the wavelength of the output light. Accordingly, the third light reflection part 256 may include Total Mirror (TM).

On the other hand, in the distance detection apparatus of Fig. 4, the optical path of the output light and the optical path of the received light are partially overlapped. As described above, the distance detecting device having a structure in which the optical paths of the light output and the light reception are partially overlapped can be called a coaxial optical system. The distance detecting device having such a structure can be downsized in size, is strong against external light, and can have a high signal-to-noise ratio.

On the other hand, it is also possible that the optical path of the output light and the optical path of the received light are completely separated from each other. As described above, the distance detecting device having a structure in which the light paths of the light output and the light reception are completely separated from each other can be called a separated optical system. This will be described later with reference to Fig.

On the other hand, the scanner 240 receives the output light from the light source 210 and sequentially performs the first direction scanning and the second direction scanning sequentially and repeatedly. Such a scanning operation is repeatedly performed for the entirety of the outer region 40. [

The detecting unit 280 detects the output light from the light source unit 210 as a first electrical signal in the first scanning period corresponding to the first area 44 of the outer area 40 during the scanning operation of the scanner 240 And converts the received light received from the outside into a second electrical signal in response to the output light in a second scanning period corresponding to the second area 42 of the outer area 40. [

To this end, the detection unit 280 may include a photodiode that converts an optical signal into an electric signal. In particular, the detection unit 280 may include an Avalanche Photodiode that converts weak light, which is scattered from the external object 240, into an electric signal with a photodiode of high photoelectric efficiency.

The sampler 285 samples the first or second electrical signal from the detector 280 and outputs the first or second sampling signal.

The processor 270 detects the distance to the external object 50 using the first phase value based on the first sampling signal and the second phase value based on the second sampling signal.

In particular, the processor 270 determines, for a second scanning interval, a difference between an estimate for a first phase value estimated from a first phase value computed during a first scanning interval and a second phase value based on a second sampling signal, The distance to the external object can be detected.

On the other hand, the processor 270 can control the overall operation of the distance detecting device.

Figs. 5A and 5B illustrate various examples of the sampling timing of the sampler in the distance detection device. Fig.

5A illustrates a case where the sampler 285 samples the sinusoidal signal at four times the sinusoidal signal frequency when the light source driving signal for driving the light source unit 210 has a sinusoidal signal. . Sampling of various drainages is possible, but hereafter sampling is exemplified at four times speed.

On the other hand, this quadruple rate sampling can be called quadruple sampling.

Referring to the drawings, it is exemplified that samples of sinusoidal waves having a predetermined frequency f are sampled at intervals of 1 / 4f to obtain respective sampling values (s0, s1, s2, ...). The resulting sample value can be calculated as shown in Equation 1 below.

On the other hand, FIG. 5A shows that the sampling interval is constant. Accordingly, the phase value? Can be calculated by the following equation (2).

On the other hand, when the quadruple sampling method is used to obtain the phase, if the sampling frequency Fs is not exactly four times the sinusoidal frequency f, an error occurs in the phase measurement value.

5B illustrates that the phase value is calculated according to the timing error of the sampling frequency.

Fig. 5B illustrates a case where the sampling frequency Fs is larger than 4 times (4f) of the sinusoidal frequency f. This shows that the sampling points of each of the sampling values s0 ', s1', s2 ', ... are pulled slightly more than the sampling points of Fig. 5A.

Accordingly, the phase value calculated using each of the sampling values (s0 ', s1', s2 ', ...) is different from the phase value of the original sinusoidal signal.

FIG. 6 is a diagram illustrating the phase error that occurs according to the sampling timing of FIG. 5B.

6 compares the phase value when Fs = 4f and the phase value when Fs > 4f when the distance between the external object 50 and the distance detecting device 200 is constant.

Since the distance between the external object 50 and the distance detecting device 200 is constant, the phase value of the received sinusoidal signal has a constant value.

Therefore, when Fs = 4f as shown in FIG. 6, the calculated phase value has a constant value. However, when Fs> 4f and Fs is constant, the computed phase value changes with a constant slope. Here, the slope is due to the difference between Fs and 4f, and if the difference between Fs and 4f is constant, the slope is also constant.

 In an actual system it is almost impossible to set Fs exactly to 4f. No matter how precisely the frequency is set, errors of several Hz to several tens Hz will occur. Therefore, the distance detecting apparatus 200 calculates the distance information by converting the calculated phase value into a distance. As shown in FIG. 6, regardless of the distance between the actual outside object 50 and the distance detecting apparatus 200 , If the phase value becomes inaccurate due to the sampling frequency error, the distance information becomes inaccurate. Therefore, in order to obtain accurate distance information, it is necessary to correct the phase value change due to the sampling frequency error. Hereinafter, various examples of the phase value change correction due to the sampling frequency error are exemplified.

8 is an internal block diagram of a signal processing unit that can be disposed between the detection unit 280 and the sampler 285 of FIG. 7, and FIG. 9 is a block diagram of an internal structure of the distance detection apparatus according to an embodiment of the present invention. 7A and 7B are operation timing diagrams of the shutter 250 shown in FIG. 7, and FIGS. 10A and 10B are views referred to explain a method of correcting the phase in the distance detection apparatus of FIG.

7, the distance detector includes a light source 210, a light source driver 260, a 2D scanner 240, a first shutter 250, a second shutter 255, a detector 280, (285), and a processor (270).

The light source driving unit 260 outputs a sinusoidal driving signal to the light source unit 210. Accordingly, the light source unit 210 outputs the output light of a single wavelength.

The processor 270 divides a pre-scan period for outputting the output light to the outer region 40 and a main scan period for outputting the output light to the outer region 40, I.e., the light source driving unit 260, based on the control signal.

For example, when the output light is output to the outer region 40 during a pre-scan period, the processor 270 determines whether the output signal is based on the electrical signal received through the detection unit 280 and the sampler 285 The active area 40 in which an external object exists and the black area 44 in which no external object exists can be distinguished from each other.

The processor 270 may distinguish between a first scanning interval corresponding to the black area 44 and a second scanning interval corresponding to the active area 40 during the main scanning interval.

Accordingly, the processor 270 controls the first shutter 250 so as to operate to output the output light to the outside in the second scanning period, in the first scanning period, to block the output of the output light to the outside, The second shutter 255 can control to transmit the output light to the detection unit 280 in the first scanning period and to block the output to the detection unit 280 of the output light in the second period.

9, a low level (L1) signal is applied to the first shutter 250 and a high level (Ly) signal is applied to the second shutter 255 in the first scanning periods TB1 and TB2 (L2) signal is applied to the first shutter 250 and the low level (Lx) signal is applied to the second shutter 255 in the second scanning periods TA1 and TA2 For example.

Assuming that the first shutter 250 and the second shutter 255 operate based on the high level signal, the second shutter 255 is opened in the first scanning periods TB1 and TB2, In the sections TA1 and TA2, the first shutter 250 is opened. That is, they are alternately opened.

Accordingly, output light is not transmitted to the 2D scanner 240 in the first scanning periods TB1 and TB2, but is directly transmitted to the detection unit 280 only. Accordingly, the detection unit 280 converts the output light from the light source unit 210 into the first electrical signal in the first scanning periods TB1 and TB2.

Next, output light is transmitted only in the direction of the 2D scanner 240 to the second scanning periods TA1 and TA2. Accordingly, the detection unit 280 receives and detects the reflected light that is reflected or scattered by the external object 50. That is, the detecting unit 280 converts the received light reflected or scattered by the external object 50 into the second electrical signal in the second scanning periods TA1 and TA2.

The detection unit 280 outputs a first electrical signal to the first scanning periods TB1 and TB2 and a second electrical signal to the second scanning periods TA1 and TA2 alternately.

8, a signal processing unit 800 as shown in FIG. 8 may be further disposed between the detector 280 and the sampler 285 in FIG.

The signal processing unit 800 includes an amplifier 810 for amplifying an electric signal from the detecting unit 280, a filter 815 for performing band pass filtering, a mixer 820 for down conversion, A filter 825 for band-pass filtering the condensed electric signal again, and an amplifier 830 for amplifying the electric signal. Here, the mixer 820 can be selectively used according to the transmission signal frequency and phase detection algorithm. As such, the amplified and filtered electrical signal is input to the sampler 285.

The sampler 285 performs sampling on the input electrical signal using the sampling frequency Fs as described above. Here, the sampling frequency may be approximately four times the frequency of the light source driving signal transmitted from the light source driver 260 to the light source 210, that is, the sinusoidal signal.

Assuming that there is a sampling frequency error as shown in FIG. 5B, when Fs > 4f and Fs is constant, the calculated phase value changes with a constant slope.

10A and 10B illustrate that the phase value (Phase 1 (Tx)) by the first electric signal and the phase value (Phase 2 (Rx)) by the second electric signal have a constant gradient and are repeated.

Assuming that the detection unit for detecting the output light and the detection unit for detecting the received light are separately provided, the phase value (Phase 1 (Tx)) corresponding to the output light and the phase value It is possible to acquire the corresponding phase value (Phase 2 (Rx)) at the same time. At this time, the phase value (Phase 1 (Tx)) corresponding to the output light is obtained regardless of the first scanning period TB corresponding to the blank area 44 and the second scanning period TA corresponding to the active area 42, And a phase value (Phase 2 (Rx)) corresponding to the received light. Accordingly, the processor 270 can obtain the compensated phase value Phase 3 by subtracting the two phase value signals Phase 1 (Tx) and Phase 2 (Rx) in real time.

On the other hand, referring to the distance detecting apparatus of Fig. 7, since one detecting section is used, the phase value (Phase1 (Tx)) corresponding to the output light and the phase value (Phase2 I can not.

10 (b), a phase value (Phase 1 (Tx)) corresponding to the output light can be obtained in the first scanning period TB corresponding to the blank area 44, but the active area 42 (Phase2 (Rx)) corresponding to the received light can be acquired in the second scanning period TA corresponding to the output light (Phase1 (Tx)) corresponding to the output light.

The processor 270 calculates the phase value Phase1 (Tx) for the second scanning period TA by using the phase value Phase1 (Tx) corresponding to the output light obtained in the first scanning period TB, (Tx)). Since the phase value change has a constant slope, it can be estimated using this.

The processor 270 then calculates an estimated phase value Phase1 (ES) corresponding to the output light and a phase value (Phase2 (Rx)) corresponding to the acquired received light during the second scanning interval TA By compensating, it is possible to obtain the compensated phase value (Phase 3).

Then, the processor 270 detects the distance to the external object 950 based on the compensated phase value (Phase 3). According to this, by detecting the distance based on the compensated phase value, it becomes possible to accurately detect the distance to the external object.

On the other hand, one sampler and a shutter can be used, thereby making it possible to downsize the distance detecting device. In addition, the manufacturing cost can be reduced.

11A to 11C are internal convex views of a distance detection device according to various embodiments of the present invention.

11A to 11C are different from FIG. 7 in that one shutter is used. Hereinafter, comparison with FIG. 7 will be mainly described.

11A shows a difference in that a shutter 250 that is inclined at 45 degrees in the optical path is used between the light source unit 210 and the 2D scanner 240 and a polarization separation unit 281 is used at the light receiving end .

The shutter 250 is turned off in the first scanning period TB and transmits the output light to the polarization separator 281 without transmitting the output light toward the 2D scanner 240.

The polarization separator 281 transmits the output light in the case of P output light in the polarization state and reflects the output light in the S polarization state.

Accordingly, in the first scanning period TB, the output light in the S polarized state is reflected by the polarization splitting unit 281 and transmitted to the detection unit 280. [

Next, the shutter 250 is turned on in the second scanning interval TA, and the output light is transmitted to the 2D scanner 240.

The polarized-light separating section 281 receives transmitted light that is scattered or reflected in the outer region, transmits the received light in the P-polarized state, and reflects the received light in the S-polarized state.

Accordingly, in the second scanning section TA, the P-polarized state of the transmitted light is transmitted through the polarized-beam splitting section 281 and transmitted to the detecting section 280. [

The detecting unit 280 outputs a first electrical signal corresponding to the first scanning period TB and a second electrical signal corresponding to the second scanning period TA alternately.

Hereinafter, the operation of the sampler 285 is the same as the description of FIG. 10B and so on, and the description thereof will be omitted.

Thus, even when one shutter is used, the distance detection can be accurately performed. Further, the manufacturing cost can be reduced.

11B, a polarized light separating unit 281 is used between the light source unit 210 and the 2D scanner 240, and a shutter 250 which is inclined at 45 degrees in the optical path is used for the light receiving end. 11A, the position of the polarized light separator 281 and the shutter 250 are changed.

Referring to the drawing, the polarized light separating unit 281 transmits the output light in the P-polarized state out of the output light to the first scanning period TB and the second scanning period TA, .

The shutter 250 is turned off in the first scanning interval TB and turned on in the second scanning interval TA. Accordingly, in the first scanning period TB, the P-polarized state reception light received in the outer region is blocked, the S-polarized state output light is reflected, and the detection light is transmitted to the detection unit 280. On the other hand, the P-polarized received light received in the outer region is transmitted to the second scanning section TA and is transmitted to the detecting section 280. [

The detecting unit 280 outputs a first electrical signal corresponding to the first scanning period TB and a second electrical signal corresponding to the second scanning period TA alternately.

Hereinafter, the operation of the sampler 285 is the same as the description of FIG. 10B and so on, and the description thereof will be omitted.

Thus, even when one shutter is used, the distance detection can be accurately performed. Further, the manufacturing cost can be reduced.

11C, there is a difference in that a shutter 250 which is inclined by 45 degrees in the optical path is used between the light source unit 210 and the 2D scanner 240.

The shutter 250 is turned off in the first scanning period TB and transmits the output light to the detector 280 without transmitting the output light toward the 2D scanner 240. [

Next, the shutter 250 is turned on in the second scanning interval TA, and the output light is transmitted to the 2D scanner 240. Accordingly, the detection unit 280 receives the transmitted light that is scattered or reflected in the outer region

Accordingly, the detecting unit 280 alternately outputs a first electrical signal corresponding to the first scanning period TB and a second electrical signal corresponding to the second scanning period TA.

Hereinafter, the operation of the sampler 285 is the same as the description of FIG. 10B and so on, and the description thereof will be omitted.

Thus, even when one shutter is used, the distance detection can be accurately performed. Further, the manufacturing cost can be reduced.

On the other hand, in the figure, the optical path of the output light input to the detection unit 280 is separated from the optical path of the received light, but the optical path may be the same. Although not shown in the drawing, it is possible to use a light reflecting portion (not shown) which reflects the output light or the received light so as to match the optical path of the output light and the received light. For example, it is possible to arrange a light reflection part (not shown) which is located at the end of the detection part 280 and is inclined by 45 degrees. In this case, the output light reflected by the shutter 250 can be reflected again by the light reflection part (not shown) and input to the light detection part 280.

The signal processing unit 800 between the detection unit 280 and the sampler 285 described above with reference to Fig. 8 may be disposed between the detection unit 280 and the sampler 285 in Figs. 11A to 11C.

FIG. 12 is an internal convex view of the distance detection device according to another embodiment of the present invention, and FIG. 13 is an operation timing diagram of the switching part of FIG.

12 differs from FIG. 7 in that the switching unit 282 is used without a shutter. Hereinafter, comparison with FIG. 7 will be mainly described.

12, the driving signal Tx, that is, the first electrical signal, output from the light source driver 260 is supplied to the switching unit 282 during the first scanning period TB and the second scanning period TA, .

On the other hand, the detection unit 280 receives the received light during the first scanning period TB and the second scanning period TA, and converts the received light into a second electrical signal and outputs it. The second electrical signal output from the detector 280 is input to the switching unit 282.

The switching unit 282 outputs the first electrical signal during the first scanning period TB among the first electrical signal and the second electrical signal that are input and during the second scanning period TA, .

That is, during the first scanning period TB, an electrical signal corresponding to the output light is output, and during the second scanning period TA, an electrical signal corresponding to the received light is output.

7, there is a difference in that the switching unit 282 performs a switching operation corresponding to the first scanning period TB and the second scanning period TA instead of the shutter.

The sampler 285 receives corresponding electric signals from the switching unit 282, respectively. Hereinafter, the operation of the sampler 285 is the same as the description of FIG. 10B and so on, and the description thereof will be omitted.

Thus, even when one shutter is used, the distance detection can be accurately performed. Further, the manufacturing cost can be reduced.

The signal processing unit 800 between the detection unit 280 and the sampler 285 described above with reference to FIG. 8 may be disposed between the switching unit 282 and the sampler 285 in FIG.

14 is an internal elevational view of a distance detection device according to another embodiment of the present invention.

14 differs from FIG. 7 in that the switching unit 282 is used without a shutter. Hereinafter, comparison with FIG. 7 will be mainly described.

Referring to FIG. 14, output light output from the light source unit 210 can be simultaneously transmitted in the direction of the 2D scanner 240 and the first detection unit 279.

The first detection unit 279 converts the output light into a first electrical signal Tx and transmits the first electrical signal Tx to the switching unit 282. The first electrical signal is input to the switching unit 282 during the first scanning period TB and the second scanning period TA.

On the other hand, the detection unit 280 receives the received light during the first scanning period TB and the second scanning period TA, and converts the received light into the second electrical signal Rx and outputs it. The second electrical signal output from the detector 280 is input to the switching unit 282.

The switching unit 282 outputs the first electrical signal during the first scanning period TB among the first electrical signal and the second electrical signal that are input and during the second scanning period TA, .

That is, during the first scanning period TB, an electrical signal corresponding to the output light is output, and during the second scanning period TA, an electrical signal corresponding to the received light is output.

7, there is a difference in that the switching unit 282 performs a switching operation corresponding to the first scanning period TB and the second scanning period TA instead of the shutter.

The sampler 285 receives corresponding electric signals from the switching unit 282, respectively. Hereinafter, the operation of the sampler 285 is the same as the description of FIG. 10B and so on, and the description thereof will be omitted.

Thus, even when one shutter is used, the distance detection can be accurately performed. Further, the manufacturing cost can be reduced.

The signal processing unit 800 between the detection unit 280 and the sampler 285 described above with reference to FIG. 8 may be disposed between the switching unit 282 and the sampler 285 in FIG.

15 is an internal block diagram of the mobile terminal of FIG.

15, the mobile terminal 100 includes a wireless communication unit 110, an A / V input unit 120, a user input unit 130, a sensing unit 140, an output unit 150, A memory 160, an interface unit 170, a control unit 180, and a power supply unit 190.

The wireless communication unit 110 may include a broadcast receiving module 111, a mobile communication module 113, a wireless Internet module 115, an NFC module 117, and a GPS module 119.

The broadcast receiving module 111 may receive at least one of a broadcast signal and broadcast related information from an external broadcast management server through a broadcast channel. At this time, the broadcast channel may include a satellite channel, a terrestrial channel, and the like.

The broadcast signal and / or broadcast related information received through the broadcast receiving module 111 may be stored in the memory 160.

The mobile communication module 113 transmits and receives a radio signal to at least one of a base station, an external terminal, and a server on a mobile communication network. Here, the wireless signal may include various types of data according to a voice call signal, a video call signal, or a text / multimedia message transmission / reception.

The wireless Internet module 115 is a module for wireless Internet access, and the wireless Internet module 115 can be built in or externally attached to the mobile terminal 100.

The NFC module 117 can perform near field communication. The NFC module 117 can receive predetermined data from the NFC apparatus when approaching within a predetermined distance from the NFC apparatus (not shown), that is, in the case of tagging.

A GPS (Global Position System) module 119 may receive position information from a plurality of GPS satellites.

The audio / video input unit 120 is for inputting an audio signal or a video signal. The audio / video input unit 120 may include a camera 121, a distance detection unit 200, a microphone 123, and the like.

The distance detecting unit 200 according to the embodiment of the present invention may be an ultra small-sized distance detecting device as shown in Figs. 4, 7, 11A, 11A, 11B, 11C, 12 or 14. The description thereof will be omitted with reference to the description of FIG. 2 to FIG. 14 described above.

On the other hand, the distance detecting unit 200 may be provided in the 3D camera 122 together with the camera 121.

Meanwhile, the calculated distance information is transmitted to the controller 180, and can be used at the time of multimedia reproduction, particularly at the time of 3D image display, or can be transmitted to the outside.

The user input unit 130 generates key input data that the user inputs to control the operation of the terminal. To this end, the user input unit 130 may include a key pad, a dome switch, and a touch pad (static pressure / static electricity). Particularly, when the touch pad has a mutual layer structure with the display unit 151 described later, it can be called a touch screen.

The sensing unit 140 senses the current state of the mobile terminal 100 such as the open / close state of the mobile terminal 100, the position of the mobile terminal 100, A sensing signal can be generated.

The sensing unit 140 may include a sensing sensor 141, a pressure sensor 143, a motion sensor 145, and the like. The motion sensor 145 can detect the movement or the position of the mobile terminal 100 using an acceleration sensor, a gyro sensor, a gravity sensor, or the like. In particular, the gyro sensor is a sensor for measuring the angular velocity, and it can sense the direction (angle) of rotation about the reference direction.

The output unit 150 may include a display unit 151, an audio output module 153, an alarm unit 155, and a haptic module 157, and the like.

The display unit 151 displays and outputs information processed by the mobile terminal 100.

Meanwhile, as described above, when the display unit 151 and the touch pad have a mutual layer structure to constitute a touch screen, the display unit 151 may be an input device capable of inputting information by a user's touch in addition to the output device Can also be used.

The audio output module 153 outputs audio data received from the wireless communication unit 110 or stored in the memory 160. [ The sound output module 153 may include a speaker, a buzzer, and the like.

The alarm unit 155 outputs a signal for notifying the occurrence of an event of the mobile terminal 100. For example, it is possible to output a signal in a vibration mode. .

The haptic module 157 generates various tactile effects that the user can feel. A typical example of the haptic effect generated by the haptic module 157 is a vibration effect.

The memory 160 may store a program for processing and controlling the control unit 180 and may store a function for temporarily storing input or output data (e.g., a phone book, a message, a still image, .

The interface unit 170 serves as an interface with all external devices connected to the mobile terminal 100. The interface unit 170 may receive data from the external device or supply power to the respective components in the mobile terminal 100 and may transmit data in the mobile terminal 100 to the external device .

The controller 180 typically controls the operation of the respective units to control the overall operation of the mobile terminal 100. For example, perform related controls and processing for voice calls, data communications, video calls, and the like. In addition, the control unit 180 may include a multimedia playback module 181 for multimedia playback. The multimedia playback module 181 may be configured in hardware in the controller 180 or separately from software in the controller 180. [ On the other hand, the operation of the control unit 180 for multimedia reproduction and the like will be described in detail with reference to FIG.

The power supply unit 190 receives external power and internal power under the control of the controller 180 and supplies power required for operation of the respective components.

The mobile terminal 100 having such a configuration can be configured to be operable in a communication system capable of transmitting data through a frame or a packet, including a wired / wireless communication system and a satellite-based communication system. have.

Meanwhile, the block diagram of the mobile terminal 100 shown in FIG. 15 is a block diagram for an embodiment of the present invention. Each component of the block diagram may be integrated, added, or omitted depending on the specifications of the mobile terminal 100 actually implemented. That is, two or more constituent elements may be combined into one constituent element, or one constituent element may be constituted by two or more constituent elements, if necessary. In addition, the functions performed in each block are intended to illustrate the embodiments of the present invention, and the specific operations and apparatuses do not limit the scope of the present invention.

16 is an internal block diagram of the control unit of Fig.

The controller 180 includes a demultiplexer 310, an image processor 320, a processor 330, an OSD generator 340, and a demultiplexer 340 for multimedia reproduction. A mixer 345, a frame rate conversion unit 350, and a formatter 360. [0035] An audio processing unit (not shown), and a data processing unit (not shown).

The demultiplexer 310 demultiplexes the input stream. For example, when an MPEG-2 TS is input, it can be demultiplexed into video, audio, and data signals, respectively. The stream signal input to the demultiplexing unit 310 may be a stream signal output from the broadcast receiving module 111 or the wireless Internet module 115 or the interface unit 170.

The image processing unit 320 may perform image processing of the demultiplexed image signal. To this end, the image processing unit 320 may include an image decoder 225 and a scaler 235. [

The video decoder 225 decodes the demultiplexed video signal and the scaler 235 scales the resolution of the decoded video signal in consideration of the output video output from the display unit 151 have.

The video decoder 225 may include a decoder of various standards.

The processor 330 may control overall operation within the mobile terminal 100 or within the controller 180. [ For example, the processor 330 may control the broadcast receiving module 111 to select an RF broadcast corresponding to a channel selected by the user or a previously stored channel.

The processor 330 may control the mobile terminal 100 by a user command or an internal program input through the user input interface unit 150. [

The processor 330 may also perform data transfer control with the network interface unit 135 or the interface unit 170. [

The processor 330 may control operations of the demultiplexing unit 310, the image processing unit 320, the OSD generating unit 340, and the like in the control unit 180.

The OSD generation unit 340 generates an OSD signal according to a user input or by itself. For example, based on a user input signal, a signal for displaying various information in graphics or text can be generated in an image output to the display unit 151. [ The generated OSD signal may include various data such as a user interface screen of the mobile terminal 100, various menu screens, widgets, and icons. In addition, the generated OSD signal may include a 2D object or a 3D object.

The mixer 345 may mix the OSD signal generated by the OSD generator 340 and the decoded video signal processed by the image processor 320. The mixed video signal is supplied to a frame rate converter 350.

A frame rate converter (FRC) 350 can convert the frame rate of an input image. On the other hand, the frame rate converter 350 can output the frame rate without conversion.

The formatter 360 receives the mixed signal, that is, the OSD signal and the decoded video signal in the mixer 345, and can change the format of the signal to be suitable for the display unit 151 and output it.

On the other hand, the formatter 360 can separate the 2D video signal and the 3D video signal for 3D video display. It is also possible to change the format of the 3D video signal or convert the 2D video signal to the 3D video signal.

On the other hand, the formatter 360 can utilize the distance information calculated by the distance detecting unit 200 when the 3D image is displayed. Specifically, the greater the size of the distance information level, the farther away the external object is, the formatter 360 can set the depth information to be small. That is, the formatter 360 can set the depth information level to be in inverse proportion to the distance information level. Then, using the depth information, the 2D image can be converted into a 3D image and output.

As a result, the formatter 360 sets the depth information level to a small value when the external object is far away, and the distance information level is large, so that the formatter 360 can be depressed when the 3D image is displayed. On the other hand, the formatter 360 sets the depth information level to a large value when the external object is close and the distance information level is small, so that the formatter 360 can protrude and display the 3D image.

Meanwhile, the audio processing unit (not shown) in the control unit 180 can perform the audio processing of the demultiplexed audio signal. To this end, the audio processing unit (not shown) may include various decoders.

In addition, the audio processing unit (not shown) in the control unit 180 can process a base, a treble, a volume control, and the like.

16 shows that the signals from the OSD generating unit 340 and the image processing unit 320 are mixed in the mixer 345 and then 3D processed in the formatter 360. However, May be located behind the formatter. That is, the output of the image processing unit 320 is 3D-processed by the formatter 360, and the OSD generating unit 340 performs 3D processing together with the OSD generation. Thereafter, the processed 3D signals are mixed by the mixer 345 It is also possible to do.

Meanwhile, the block diagram of the controller 180 shown in FIG. 16 is a block diagram for an embodiment of the present invention. Each component of the block diagram can be integrated, added, or omitted according to the specifications of the control unit 180 actually implemented.

In particular, the frame rate converter 350 and the formatter 360 are not provided in the controller 180, but may be separately provided.

The image processing apparatus including the distance detecting apparatus according to the embodiment of the present invention is not limited to the configuration and method of the embodiments described above but the embodiments can be applied to various implementations All or some of the examples may be selectively combined.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention.

Claims (21)

A light source unit for outputting output light;
A scanner for sequentially performing the first direction scanning and the second direction scanning and outputting the output light to an outer region;
Wherein the first scanning period corresponding to the first area of the outer area during the scanning operation of the scanner converts the output light from the light source part into a first electrical signal and a second electrical signal corresponding to the second area of the outer area, A detection section for converting a received light received from the outside into a second electrical signal corresponding to the output light;
A sampler for sampling a first or second electrical signal from the detector and outputting a first or a second sampling signal; And
And a processor for detecting a distance to the external object using a first phase value based on the first sampling signal and a second phase value based on the second sampling signal. The method according to claim 1,
The processor comprising:
During the second scanning interval,
And a distance to the external object is detected using the difference between the estimated value of the first phase value estimated from the first phase value calculated during the first scanning period and the second phase value, Distance detecting device. The method according to claim 1,
Wherein the first area corresponds to an area where the external object does not exist in the external area,
And the second region corresponds to a region in which the external object exists in the external region. The method according to claim 1,
A first shutter that interrupts the output of the output light to the outside in the first scanning period and outputs the output light to the outside in the second scanning period;
And a second shutter that transmits the output light to the detection unit in the first scanning period and blocks the output of the output light to the detection unit in the second period. The method according to claim 1,
A shutter for interrupting the output of the output light to the outside in the first scanning period and outputting the output light to the outside in the second scanning period; And
And a polarization splitting unit that receives the output light reflected from the shutter in the first scanning period and receives the received light in the second scanning period,
Wherein:
Wherein the first scanning section converts the output light into a first electrical signal and converts the received light into a second electrical signal in the second scanning section. The method according to claim 1,
A polarized light separator for transmitting the first polarized light of the output light and reflecting the second polarized light; And
A first scanning section for blocking the incoming light based on the first polarized light and reflecting the second polarized light out of the output light, transmitting the second scanning section for receiving the first polarized light, And a shutter for blocking the second polarized light from the output light,
Wherein:
Wherein the first scanning section converts the second polarized light out of the output light into a first electrical signal and converts the received light based on the first polarized light into a second electrical signal in the second scanning section . The method according to claim 1,
And a shutter that interrupts the output of the output light to the outside in the first scanning period and reflects the output light in the direction of the detection unit and outputs the output light to the outside in the second scanning period ,
Wherein:
Wherein the first scanning section converts the output light into a first electrical signal and converts the received light into a second electrical signal in the second scanning section. The method according to claim 1,
The processor comprising:
A control unit for controlling the light source unit to be divided into a pre-scan period for outputting the output light to the outer region and a main scan period for outputting the output light to the outer region,
And distinguishes the first region and the second region based on the received light received from the outside during the pre-scan period. The method according to claim 1,
And a signal processor disposed between the detector and the sampler, the signal processor including an amplifier for amplifying a first electrical signal or a second electrical signal output from the detector, and a filter for performing filtering, Detection device. A light source unit for outputting output light;
A light source driving unit for driving the light source unit by a first electrical signal;
A scanner for sequentially performing the first direction scanning and the second direction scanning and outputting the output light to an outer region;
A detector for converting received light received from the outside into a second electrical signal corresponding to the output light;
Wherein the scanner outputs the first electrical signal in a first scanning period corresponding to a first area of the outer area where the external object does not exist during the scanning operation of the scanner, A second scanning section corresponding to the second area, the switching section outputting the second electrical signal;
A sampler for sampling the first or second electric signal of the switching sub-rotor and outputting a first or a second sampling signal; And
And a processor for detecting a distance to the external object using a first phase value based on the first sampling signal and a second phase value based on the second sampling signal. 11. The method of claim 10,
The processor comprising:
During the second scanning interval,
And a distance to the external object is detected using the difference between the estimated value of the first phase value estimated from the first phase value calculated during the first scanning period and the second phase value, Distance detecting device. 11. The method of claim 10,
And a signal processing unit disposed between the switching unit and the sampler, the signal processing unit including an amplifier for amplifying a first electrical signal or a second electrical signal output from the switching unit, and a filter for performing filtering. . A light source unit for outputting output light;
A first detector for converting the output light into a first electrical signal;
A scanner for sequentially performing the first direction scanning and the second direction scanning and outputting the output light to an outer region;
A second detector for converting received light received from the outside into a second electrical signal corresponding to the output light;
Wherein the scanner outputs the first electrical signal in a first scanning period corresponding to a first area of the outer area where the external object does not exist during the scanning operation of the scanner, A second scanning section corresponding to the second area, the switching section outputting the second electrical signal;
A sampler for sampling the first or second electric signal of the switching sub-rotor and outputting a first or a second sampling signal; And
And a processor for detecting a distance to the external object using a first phase value based on the first sampling signal and a second phase value based on the second sampling signal. 14. The method of claim 13,
The processor comprising:
During the second scanning interval,
And a distance to the external object is detected using the difference between the estimated value of the first phase value estimated from the first phase value calculated during the first scanning period and the second phase value, Distance detecting device. 14. The method of claim 13,
And a signal processing unit disposed between the switching unit and the sampler, the signal processing unit including an amplifier for amplifying a first electrical signal or a second electrical signal output from the switching unit, and a filter for performing filtering. . display;
A scanner that sequentially performs a first direction scanning and a second direction scanning to output the output light to an external area; and a controller that controls the scanning operation of the external object A second scanning section corresponding to a second area in which the external object is present, and a second scanning section corresponding to a second area in which the external object is present, in a first scanning section corresponding to a non-existent first area, A detection unit for converting received light received from the outside into a second electrical signal in response to the output light; and a control unit for sampling the first or second electrical signal from the detection unit and outputting a first or second sampling signal And using a first phase value based on the first sampling signal and a second phase value based on the second sampling signal, Distance detecting unit for detecting the distance to; And
And a controller for controlling the 3D image to be displayed on the display using the distance information detected by the distance detecting unit. 17. The method of claim 16,
Wherein the distance detecting unit comprises:
During the second scanning interval,
And a distance to the external object is detected using the difference between the estimated value of the first phase value estimated from the first phase value calculated during the first scanning period and the second phase value, Image processing apparatus. display;
A scanner for sequentially performing a first directional scanning and a second directional scanning and outputting the output light to an outer region, a light source driving unit for driving the light source unit by a first electrical signal, A first scanning unit for scanning the first area corresponding to a first area of the outer area where the external object does not exist during a scanning operation of the scanner, A switching unit for outputting the second electrical signal in a second scanning period corresponding to a second area of the outer area where the external object is present; And a sampler for sampling a first or second electrical signal of the first sampling signal and outputting a first sampling signal or a second sampling signal, And a second phase value based on the second sampling signal to detect a distance to the external object; And
And a controller for controlling the 3D image to be displayed on the display using the distance information detected by the distance detecting unit. 19. The method of claim 18,
Wherein the distance detecting unit comprises:
During the second scanning interval,
And a distance to the external object is detected using the difference between the estimated value of the first phase value estimated from the first phase value calculated during the first scanning period and the second phase value, Image processing apparatus. display;
A first detector for converting the output light into a first electrical signal; a scanner for sequentially performing a first directional scanning and a second directional scanning to output the output light to an outer region; A second detection unit that converts a received light received from the outside into a second electrical signal corresponding to the output light, and a second detection unit that detects a position of the first area corresponding to a first area of the outer area, A switching unit for outputting the second electrical signal in a second scanning period corresponding to a second area of the outer area where the external object is present, the switching unit outputting the first electrical signal in a first scanning period, And a sampler for sampling the first or second electrical signal of the switching sub-rotor and outputting the first or second sampling signal, wherein the first phase value based on the first sampling signal , Using a second phase value based on the second sampling signal, a distance detection unit for detecting a distance to the external object; And
And a controller for controlling the 3D image to be displayed on the display using the distance information detected by the distance detecting unit. 21. The method of claim 20,
Wherein the distance detecting unit comprises:
During the second scanning interval,
And a distance to the external object is detected using the difference between the estimated value of the first phase value estimated from the first phase value calculated during the first scanning period and the second phase value, Image processing apparatus.

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