CN102033549B - Viewing angle adjusting device of display device - Google Patents
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- CN102033549B CN102033549B CN200910174134.4A CN200910174134A CN102033549B CN 102033549 B CN102033549 B CN 102033549B CN 200910174134 A CN200910174134 A CN 200910174134A CN 102033549 B CN102033549 B CN 102033549B
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Abstract
The invention relates to a viewing angle adjusting device of a display device. The viewing angle adjusting device of a display device is characterized in that: the viewing angle adjusting device comprises an image pickup unit for picking up objects or scenes in the front of the display device, a drive unit which is used for driving the display device to rotate or move, and a control unit which receives images picked up by the image pickup unit, recognizing faces from the image to determine the target position and controlling the drive unit to drive the display device to rotate and/or move according to the mapping position of the center of the screen of the display device on the image and the target position, so as to enable the mapping position in the image and the target position to be coincided.
Description
Technical field
The present invention relates to a kind of viewing angle adjustment device of display device, more particularly, relate to a kind of device of adjusting the visual angle of display device with image capture device.
Background technology
Conventionally, the display device such as flat panel TV, CRT TV is fixed on certain position conventionally.When user changes viewing location, the position that need to adjust display device obtains the suitable visual angle of watching, thereby can watch clearly picture.Generally, by display device being rotated to an angle or visual angle is adjusted in the position of mobile display device, make display device just to face user, now visual angle is zero degree.Yet, along with the size of display device increases gradually, by manual adjustment, there is certain difficulty.
In order to address this problem, propose to drive display device to rotate to adjust the scheme at visual angle by motor.For example, application number is that the Chinese utility model application of CN 99246407.2 discloses a kind of computer apparatus that can automatically adjust display viewing angles, it is as drive unit by stepper motor, and coordinate USB rocking bar with wireless and/or wired mode of operation, stepper motor to be controlled, so that display is bowed, the adjustment of elevation angle degree and left and right gyration.The problem that this scheme exists is to come the operation of manual control step motor to make the aim at the mark spectators of position of display according to user's sensation, cannot realize and control accurately to obtain suitable visual angle.
The Chinese patent application that application number is CN 200710110286.9 provides a kind of audio-visual apparatus, comprising: a plurality of receivers, computing and control module and step motor.Described receiver is arranged in respectively the diverse location of audio-visual apparatus, the signal sending in order to receive user.According to the received signal of described receiver, computing and control module will estimate the visual angle of user and audio-visual apparatus, and according to visual angle output motor control signal, to control the described step motor rotation audio-visual apparatus that is arranged in audio-visual apparatus chassis, to change visual angle.What this scheme need to utilize that user sends just can calculate the visual angle of user and audio-visual apparatus such as ultrared signal.Because the adjustment at visual angle is that position based on human eye is adjusted, so the definite visual angle of this scheme is actually that the sender unit that carries based on user adjusts, rather than the eye locations based on user is adjusted visual angle.That is, from the position of sender unit, to watch be suitable at this scheme definite visual angle.In addition, this scheme only can be adjusted the visual angle in horizontal direction, and does not adjust the visual angle of vertical direction.Therefore, this scheme still can not obtain suitable visual angle exactly.
Publication number be US2009/0025022 U.S. Patent Application Publication a kind of system of adjusting the visual angle of display, this system utilize thermal sensor or pressure transducer detect user position, utilize motion sensor detect user height, utilize recognition of face to determine the position of people's face, thereby the parameter based on above-mentioned detection is calculated the visual angle of need adjusting.Yet, in this scheme, need to use multiple sensors, for example, in order to detect user's position, also need in user's activity space, arrange a plurality of thermal sensors or pressure transducer.Therefore, this scheme uses very complicated, and cost is higher.
Therefore, need a kind of can be relatively easily and adjust exactly the position of display or orientation to obtain the device at suitable visual angle.
Summary of the invention
The object of the present invention is to provide a kind of device of adjusting the visual angle of display device, suitable position or orientation that this device can automatically accurately be adjusted display, so that user obtains the suitable visual angle of watching.
An aspect of of the present present invention provides a kind of viewing angle adjustment device of display device, it is characterized in that comprising: image unit, for making a video recording; Driver element, drives display device to be rotated or moves; Control module, receive the image that image unit is taken, from described image, identify people's face to determine target location, drive unit drives display device rotation and/or mobile is controlled in the position of shining upon on described image according to the screen center of display device and described target location, makes to overlap with target location in the position of shining upon described in described image.
Described image unit can comprise the first camera head and/or the second camera head, wherein, the first camera head is arranged on the center of lateral edges of the screen of described display device, the second camera head is arranged on the coboundary of screen or the center of lower limb of described display device, and the first camera head is vertical with the optical axis of the second camera head and the screen of display device.
When described target location is on the horizontal center line of the image of the first camera head shooting, control module is controlled drive unit drives display device and is rotated up and/or move, until described target location overlaps with described horizontal center line; When described target location is under the horizontal center line of the image of the first camera head shooting, control module is controlled drive unit drives display device and is rotated down and/or moves, until described target location overlaps with described horizontal center line.
During the vertical center line of the image of taking at the second camera head when described target location left, control module is controlled drive unit drives display device to anticlockwise and/or movement, until described target location overlaps with described vertical center line; During the vertical center line of the image of taking at the second camera head when described target location right, control module is controlled drive unit drives display device to right rotation and/or movement, until described target location overlaps with described vertical center line.
When recognizing people's face, described target location can Wei Renlian center or place between the eyebrows position.
When recognizing a plurality of people's face, the mean place in a plurality of people that described target location can be described identification precalculated position on the face.
Described precalculated position can Wei Renlian center or place between the eyebrows position.
Described image unit can comprise at least one camera head, and when described image unit comprises a camera head, described camera head is arranged on the center of the screen of display device, and its optical axis is vertical with the screen of display device; When described image unit comprises two camera heads, the first camera head is arranged on the center of lateral edges of the screen of described display device, the second camera head is arranged on the coboundary of screen or the center of lower limb of described display device, and the first camera head is vertical with the optical axis of the second camera head and the screen of display device.
In the time of on the center of the image of taking at image unit when described target location, control module can be controlled that drive unit drives display device rotates up and/or be mobile, until described target location and described center superposition; When described target location is under the center of the image of image unit shooting, control module is controlled drive unit drives display device and is rotated down and/or moves, until described target location and described center superposition.
During the center of the image of taking at image unit when described target location left, control module can be controlled drive unit drives display device to anticlockwise and/or movement, until described target location and described center superposition; During the center of the image of taking at image unit when described target location right, control module is controlled drive unit drives display device to right rotation and/or movement, until described target location and described center superposition.
When described target location is during at the position of described mapping left, control module can be controlled drive unit drives display device to anticlockwise and/or movement, until described target location overlaps with the position of described mapping; When described target location is during at the position of described mapping right, control module is controlled drive unit drives display device to right rotation and/or movement, until described target location overlaps with the position of described mapping.
In the time of on the position of described target location in described mapping, control module can be controlled that drive unit drives display device rotates up and/or be mobile, until described target location overlaps with the position of described mapping; In the time of under the position of described target location in described mapping, control module is controlled drive unit drives display device and is rotated down and/or moves, until described target location overlaps with the position of described mapping.
Described viewing angle adjustment device also can comprise range sensor, distance for detection of spectators and screen, wherein, the distance relation between control module can detect according to range sensor distance, image unit and screen center and the optical parametric of image unit are determined the mapping position of screen center on the image of image unit shooting.
The device at the visual angle of adjustment display device provided by the invention can be determined target location by the image of taking, and display is adjusted to be suitable for position or the orientation that spectators watch picture automatically and accurately.Viewing angle adjustment device of the present invention does not need the sensors such as range sensor, position transducer, motion sensor to detect spectators with respect to the position of display, thereby do not need to calculate the angle that needs are adjusted, and do not need spectators to carry the device of auxiliary positioning, can realize with less cost the accurate adjustment at visual angle.
Accompanying drawing explanation
By the detailed description of carrying out below in conjunction with accompanying drawing, above and other objects of the present invention, feature and advantage will become apparent, wherein:
Fig. 1 illustrates the block diagram according to viewing angle adjustment device of the present invention;
Fig. 2 A-2C illustrates according to the schematic diagram of the adjustment principle of viewing angle adjustment device of the present invention;
Fig. 3 illustrates according to the schematic diagram of the layout of the image unit of viewing angle adjustment device of the present invention;
Fig. 4 illustrates according to the first Image Adjusting horizontal view angle example;
Fig. 5 illustrates according to the second vertical visual angle of Image Adjusting example;
Fig. 6 shows according to a plurality of spectators' of the first Image Adjusting horizontal view angle example;
Fig. 7 shows according to a plurality of spectators' of the second Image Adjusting vertical visual angle example;
Fig. 8 shows another example according to a plurality of spectators' of the first Image Adjusting horizontal view angle.
Embodiment
Below in conjunction with accompanying drawing, describe embodiments of the invention in detail.
Fig. 1 illustrates according to the block diagram of viewing angle adjustment device 100 of the present invention.As shown in Figure 1, viewing angle adjustment device 100 comprises: image unit 110, control module 120, driver element 130.
Specifically, if the screen of display 200 faces Yu Gai target location, the position coincidence that a target location ，Ze screen center is mapped to the plane at this place, target location.Because image unit 110 is taken the object in screen the place ahead of displays 200, display 200 is adjusted in the position that can utilize the screen center of display 200 to be mapped on the image that image unit 110 takes.
Fig. 2 A-2C illustrates according to the schematic diagram of the adjustment principle of viewing angle adjustment device of the present invention.As shown in Figure 2 A, now the screen center of display 200 and spectators U1 be in the horizontal direction at a distance of certain distance, and screen center faces the A1 point in the plane at spectators U1 place.Obviously, in the image of taking at image unit 110, A1 point (Ji， screen center is mapped to the position on this image) and spectators U1 are also at a distance of certain distance.As shown in Figure 2 B, when display 200 move to shown in position Shi， screen center face spectators U1.As shown in Figure 2 C, when display 200 rotate to shown in position Shi， screen center face spectators U1.Shown in Fig. 2 B and 2C in the situation that, in real world, A1 point overlaps with spectators U1; In the image of taking at image unit 110, A1 point (Ji， screen center is mapped to the position on this image) also overlaps with spectators U1.
Therefore in the image that, control module 120 is taken according to image unit 110, spectators' position and screen center are mapped to position in this image and control driver element 130 driving displays 200 and realize the adjustment at visual angle.Pre-determine the precalculated position (for example, spectators Lian center, place between the eyebrows or other positions) of the spectators in image as target location.
When target location is mapped to target location on the image that image unit 110 takes left in screen center, control module 120 can be controlled driver element 130 and drive display devices to anticlockwise and/or movement; When target location is mapped to target location on the image that image unit 110 takes right in screen center, control module 120 can be controlled driver element 130 and drive display device to right rotation and/or movement, until the target location in image overlaps with the position of described mapping.
Similarly, when target location is on screen center is mapped to the position on the image that image unit 110 takes, control module 120 can be controlled driver element 130 and drive display devices to rotate up and/or mobile; When target location is under screen center is mapped to the position on the image that image unit 110 takes, control module 120 can be controlled driver element 130 and drives display device to be rotated down and/or move, until the target location in image overlaps with the position of described mapping.
When image unit 110 is disposed in the screen center of display 200, the center of the image that image unit 110 is taken is that screen center is mapped to the position on the image of shooting.
When image unit 110 is not while being disposed in the screen center of display 200, there is certain deviation in the physical location on the center of the image that image unit 110 is taken and the image that screen center is mapped to shooting, far away when the screen of spectators' range display 200, skew is less.Because the certain distance of the common range display 200 of spectators is watched, the center of the image of therefore can image unit 110 taking is set to the position on image that screen center is mapped to shooting, for carrying out the adjustment at visual angle.
Yet, when image unit 110 is not while being disposed in the screen center of display 200,, during the line disalignment of the optical axis of image unit 110 and normal to screen by screen center, as described above, mapping position on the image that screen center takes at image unit 100 can change according to the distance of the object of taking, and can affect like this precision that visual angle is adjusted, and position completely can not aim at the mark.When particularly the screen of spectators' range display 200 is nearer, there will be larger error.If need to realize more accurately the adjustment at visual angle, this mapping position can be determined by the mapping transformation of coordinate system by the distance of spectators and screen, distance relation between image unit 110Yu screen center and the optical parametric of image unit 110.In other embodiment of the present invention, viewing angle adjustment device 100 also can comprise: range sensor, and for detection of the distance of spectators and screen.Wherein, the optical parametric of the distance that control module 120 detects according to range sensor, the distance relation between image unit 110Yu screen center (for example, horizontal range and vertically distance) and image unit 110 is determined the mapping position of screen center on the image of image unit 100 shootings.
Fig. 3 illustrates does not need to carry out the schematic diagram of layout that the image unit 110 of above-mentioned mapping position is determined in mapping transformation according to an embodiment of the invention.
In this embodiment, image unit 110 comprises the first camera head 111 and the second camera head 112.The first camera head 111 is arranged on the coboundary or lower limb of display 200, and is positioned on the vertical center line of screen of display 200.The second camera head 112 is arranged on a lateral edges of display 200, and is positioned on the horizontal center line of screen of display 200.The first camera head 111 and the second camera head 112 separately the optical axis of camera lens and the axis of screen perpendicular to display 200 parallel.
Here it should be noted that, take and spectators watch screen in the situation that not affecting, the any position of the position of the first camera head 111 in the plane of the screen perpendicular to display 200 that comprises above-mentioned vertical center line is all feasible, and any position of the position of the second camera head 112 in the plane of the screen perpendicular to display 200 that comprises above-mentioned horizontal center line is all feasible.
Because the first camera head 111 is positioned on the vertical center line of screen of display 200, so the mapping point in the first image of taking at the first camera head 111 of the screen center of display 200 is positioned on the vertical center line of the first image.Therefore, when the face of spectators in the first image is centered close to the face that the vertical center line Shang Shi， screen center of the first image aims at spectators in the horizontal direction.By the first camera head 111, come the visual angle of level of control direction.
If the first camera head 111 is not positioned on the vertical center line of screen of display 200, because there is certain distance in the first camera head 111Yu screen center, the variation of the distance therefore frameing out along with spectators, the position that screen center shines upon in the first image also changes thereupon, and this mapping position needs the distance of spectators and screen and the optical parametric of the first camera head 111 to determine, implement very complicated.And when the first camera head 111 is positioned on the vertical center line of screen of display 200, the variation of the distance frameing out along with spectators, only move on the vertical center line of the first image the position that screen center shines upon in the first image.That is to say, the position that screen center shines upon on the first image is fixed in the horizontal direction.Can in the first image, determine the control reference line of horizontal direction like this, in the first image, when wishing that the object of screen center's aligning overlaps with the control reference line of this horizontal direction, in real world Zhong， screen center, aim in the horizontal direction this object.
Therefore, control module 120 can be according to the first image control display 200 left rotation and right rotation or the movement receiving, and the face center of the spectators in the first image that makes to detect overlaps with the vertical center line of the first image, realizes the adjustment of horizontal view angle.When specifically ，Dang face is centered close to the left side of vertical center line of the first image, by display 200 (that is, spectators' right side) rotation or mobile left; When face is centered close to the right side of vertical center line of the first image, by display 200 (that is, spectators' left side) rotation or mobile to the right.
Similarly, because the second camera head 112 is positioned on the horizontal center line of screen of display 200, so the mapping point in the second image of taking at the second camera head 112 of the screen center of display 200 is positioned on the horizontal center line of the second image.That is to say, the position in the vertical direction that screen center shines upon on the second image is fixed.Therefore, when the face of spectators in the second image, be centered close to the in the vertical direction aligning spectators' of horizontal center line Shang Shi， screen center of the second image face.By the second camera head 112, control the visual angle of vertical direction.
Like this, by arranging the first camera head 111 and the second camera head 112, can determine the level of the mapping of screen center on the first image and the vertical position shining upon on the second image, thereby control display 200, the optical parametric of service range, camera head is not determined the mapping position of screen center on the image of taking.
Fig. 4 illustrates according to the first Image Adjusting horizontal view angle example.In the first image shown in Fig. 4, spectators' face is centered close to the right side of vertical centre line L 1, and now control module 120 is controlled displays 200 to right rotation or movement, until in the first image vertically centre line L 1 and face's center superposition.
Fig. 5 illustrates according to the second vertical visual angle of Image Adjusting example.In the second image shown in Fig. 5, spectators' face is centered close to the upside of horizontal center line L2, and now control module 120 is controlled that displays 200 rotate up or be mobile, until in the second image horizontal center line L2Yu face center superposition.
Above-mentioned horizontal view angle and the vertically adjustment at visual angle can be carried out also can carrying out respectively simultaneously.In addition, when adjusting visual angle, can, as required separately by rotating or mobile carrying out, also can by rotating and moving, be undertaken, simultaneously.
Utilize detection Ren Lian center to adjust horizontal view angle and vertical visual angle as target location above, it can realize the adjustment at visual angle substantially.It has been generally acknowledged that when the extended line of the axis at the center of the screen perpendicular to display is aimed at spectators' the position of place between the eyebrows, can obtain best viewing effect.Therefore, spectators' that also can be based on detecting in the first and second images place between the eyebrows is adjusted horizontal view angle and vertical visual angle as target location, can realize like this adjustment more accurately.Because people's place between the eyebrows is generally positioned at the particular range of people's face, so can determine the position of spectators' place between the eyebrows in image.
In addition, this target location can be also other positions or the position of people's face, and user can arrange adjustment according to the custom of watching of oneself.For example, some spectators may like overlooking and watches screen, target location can be adjusted under eye.
The embodiment that adjusts the visual angle of display for spectators has been described above.When adjusting visual angle for a plurality of spectators, can adjust visual angle according to spectators' mean place.
Fig. 6 shows according to a plurality of spectators' of the first Image Adjusting horizontal view angle example.In the first image shown in Fig. 6, there are tri-users of user U1, U2 and U3.Control module 120 for example, according to the coordinate of the horizontal direction of the target location of the face of spectators U1, U2 and U3 (，Lian center or place between the eyebrows position), calculate outermost two spectators U1 and U3 face target location in the horizontal direction mean place P1 as the average target location of level.Control module 120 rotates to the left and right or moves according to the average target location P1 of level and vertical centre line L 1 control display 200.Now P1 is positioned at the left side of vertical centre line L 1, and control module 120 is controlled display 200 to anticlockwise or movement, until vertical centre line L 1 overlaps with P1 in the first image.
Similarly, as shown in Figure 7, control module 120 can calculate the mean place P2 of target location in the vertical direction of the spectators U1 of top side and lower side and the face of U3 as vertical average criterion position, and according to P2 and horizontal center line L2, controls that display 200 rotate up and down or movement.Now P2 is positioned at the upside of horizontal center line L2, and control module 120 control displays 200 rotate up or be mobile, until horizontal center line L2 overlaps with P2 in the second image.
In the above example, only the mean place of the spectators based on edge as target location.When spectators are less or during distribution uniform, can obtain with less calculated amount desirable target location.Yet when spectators' skewness, this mode of determining control reference point can not be looked after most of spectators.For example, the first image shown in Fig. 8 is compared with the first image shown in Fig. 6, many spectators U4 and U5.The spectators in left side are obviously many than the spectators on right side, if now still usining P1 controls display 200 as target location, obviously can not look after most of spectators.Therefore when left side spectators are many, using to P1 left side, be offset certain distance certain line P1 ' as target location; When right side spectators are many, using certain line P1 ' of P1 right side skew certain distance as target location.
Therefore,, when there are a plurality of spectators, the coordinate figure of spectators' that also can be based on all identifications target location on the face (such as ，Ren Lian center, place between the eyebrows position etc.) is determined average criterion position.For the first image, the mean value of the horizontal coordinate value of the target location of others face of calculating knowledge is as the average target location of level.For the second image, the mean value of the vertical coordinate figure of the target location of others face of calculating knowledge is as vertical average criterion position.
In other embodiment of the present invention, image unit 110 can only comprise the first camera head 111 or the second camera head 112.Because may only need to carry out horizontal view angle or the vertically adjustment at visual angle in some occasion.
In other embodiment of the present invention, image unit 110 can only comprise a camera head, and this camera head is positioned at the screen center of display 200, and the optical axis of this camera head is vertical with the screen of display device.Now, the center of the image of shooting is corresponding to the screen center of display 200.Therefore can as controlling reference point, control screen left and right/rotation or mobile up and down by the center of image, the center of image be overlapped with spectators Lian center (or place between the eyebrows), thereby complete the adjustment at visual angle.When adjusting visual angle for a plurality of spectators, can utilize equally above-described mode to determine the average criterion position of horizontal direction and vertical direction.Now, the vertical center line of the image that P1 takes with respect to a described camera head, the horizontal center line of the image that P2 takes with respect to a described camera head.
Yet due at single screen display, the center arrangement camera head at screen, can affect viewing effect.Therefore this embodiment can be applicable to the giant display consisting of a plurality of sub-screens, if the screen center of this giant display is the edge of a plurality of sub-screens, the screen center at this giant display arranges that camera head is very micro-on viewing effect impact.
The invention provides a kind of device of adjusting the visual angle of display device, this device can be determined target location by the spectators' that take image, the relation of the position of shining upon on the image of taking by the screen center of this target location and display device, can automatically accurately adjust to display to be suitable for position or the orientation that spectators watch picture.Compare with the viewing angle adjustment device of prior art, viewing angle adjustment device of the present invention does not need range sensor, position transducer, motion sensor sensor to detect spectators with respect to the position of display, thereby do not need to calculate the angle that needs are adjusted, and do not need spectators to carry the device of auxiliary positioning, can realize with less cost the accurate adjustment at visual angle.
Claims (6)
1. a viewing angle adjustment device for display device, is characterized in that comprising:
Image unit, for making a video recording to the object in display device the place ahead or scene;
Driver element, for driving display device to be rotated or moving;
Control module, receive the image that image unit is taken, from described image, identify people's face to determine target location, drive unit drives display device rotation and/or mobile is controlled in the position of shining upon on described image according to the screen center of display device and described target location, make to overlap with target location in the position of shining upon described in described image
Wherein, described image unit comprises the first camera head and the second camera head, wherein, the first camera head is arranged on the center of lateral edges of the screen of described display device, the second camera head is arranged on the coboundary of screen or the center of lower limb of described display device, the first camera head is vertical with the optical axis of the second camera head and the screen of display device
The horizontal center line of the image that the first camera head is taken limits the vertical position that described screen center shines upon on this image; The vertical center line of the image that the second camera head is taken limits the horizontal level that described screen center shines upon on this image.
2. viewing angle adjustment device as claimed in claim 1, it is characterized in that: when described target location is on the horizontal center line of the image of the first camera head shooting, control module is controlled drive unit drives display device and is rotated up and/or move, until described target location overlaps with described horizontal center line; When described target location is under the horizontal center line of the image of the first camera head shooting, control module is controlled drive unit drives display device and is rotated down and/or moves, until described target location overlaps with described horizontal center line.
3. viewing angle adjustment device as claimed in claim 1, it is characterized in that: during the vertical center line of the image of taking at the second camera head when described target location left, control module is controlled drive unit drives display device to anticlockwise and/or movement, until described target location overlaps with described vertical center line; During the vertical center line of the image of taking at the second camera head when described target location right, control module is controlled drive unit drives display device to right rotation and/or movement, until described target location overlaps with described vertical center line.
4. viewing angle adjustment device as claimed in claim 1, is characterized in that: when recognizing people's face, and described target location behaviour Lian center or place between the eyebrows position.
5. viewing angle adjustment device as claimed in claim 1, is characterized in that: when recognizing a plurality of people's face, and the mean place in a plurality of people that described target location is described identification precalculated position on the face.
6. viewing angle adjustment device as claimed in claim 5, is characterized in that: described precalculated position behaviour Lian center or place between the eyebrows position.
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| CN200910174134.4A CN102033549B (en) | 2009-09-30 | 2009-09-30 | Viewing angle adjusting device of display device |
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| CN112540649B (en) * | 2020-12-11 | 2024-02-20 | 深圳市创智成科技股份有限公司 | Rotation control method of display screen and notebook computer |
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| CN102033549A (en) | 2011-04-27 |
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