CN106331551B - Projection image control system and projection image control method - Google Patents
Projection image control system and projection image control method Download PDFInfo
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- CN106331551B CN106331551B CN201610841278.0A CN201610841278A CN106331551B CN 106331551 B CN106331551 B CN 106331551B CN 201610841278 A CN201610841278 A CN 201610841278A CN 106331551 B CN106331551 B CN 106331551B
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- projection image
- rotation angle
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000005484 gravity Effects 0.000 claims abstract description 34
- 230000006870 function Effects 0.000 claims description 32
- 230000008569 process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
Abstract
The invention provides a projection image control system and a projection image control method, wherein the system comprises a projector capable of projecting a projection image on a curtain, a gravity sensor capable of sensing the rotation angle of the projector is arranged in the projector, and the gravity sensor senses the rotation angle of the projector to form an angle signal; the gravity sensor is electrically connected with a central control chip which is arranged in the projector, and the central control chip comprises an acquisition module, a calculation module which can calculate the rotation angle and the rotation direction function of the image according to the acquisition signal, and a control module which can control the rotation angle and the rotation direction of the projection image according to the calculation signal formed by the calculation module; the control module is electrically connected with an image display chip, and the image display chip controls the rotation angle and the rotation direction of the projection image on the curtain according to the control signal. The gravity sensor is arranged in the projector, so that the rotation angle and the rotation direction of the projection image are controlled, the projector is not limited by places, and the application range is wider.
Description
Technical Field
The invention belongs to a control system of a projector, and particularly relates to an automatic image overturning control system of the projector.
Background
With the continuous improvement of living standard, the application of projectors has become more and more popular. However, in the case of the conventional projector, there is a high requirement on the placement position of the projector to ensure that the projected image is a forward image.
Chinese patent No. CN 101815191A discloses a method for adjusting a projected image of a projector of a portable terminal and a portable terminal, wherein the method is to first obtain position information of the projector of the portable terminal, and then adjust the projected image of the projector of the portable terminal according to the position information and a preset standard position parameter.
Although the projection image can be further adjusted by acquiring the position information of the projector in the above patent, the internal process is complicated and a large error is liable to occur.
Disclosure of Invention
In order to solve the problems, the invention provides a projection image control system and a projection image control method, and the invention realizes the control of the rotation angle and the rotation direction of a projection image by arranging a gravity sensor in the projector, so that the projector is not limited by places, and the application range is wider.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a projection image control system comprises a projector capable of projecting a projection image on a curtain, wherein a gravity sensor capable of sensing the rotation angle of the projector is arranged in the projector, and the gravity sensor senses the rotation angle of the projector to form an angle signal; the gravity sensor is electrically connected with a central control chip which is arranged in the projector, and the central control chip comprises an acquisition module which can acquire angle signals to form acquisition signals, a calculation module which is arranged in the central control chip and can calculate image rotation angles and rotation direction functions according to the acquisition signals, and a control module which can control the rotation angles and the rotation directions of projection images according to the calculation signals formed in the calculation module; the control module is electrically connected with an image display chip, and the image display chip controls the rotation angle and the rotation direction of the projection image on the curtain according to the control signal.
A projection image control method, which uses the projection image control system, comprises the following steps: starting the projector; the gravity sensor knows the rotation angle of the projector: the gravity sensor senses the gravity deflection direction and the deflection angle of the projector, calculates the rotation angle of the projector, and forms an angle signal; the central control chip receives the angle signal and forms a control signal: the acquisition module in the central control chip acquires the angle signals to form acquisition signals and sends the acquisition signals to the calculation module, the calculation module calculates according to the acquisition signals and built-in calculated image rotation angles and rotation direction functions to form calculation signals, and the control module acquires the calculation signals and forms control signals for controlling the image rotation angles and rotation directions according to the calculation signals; the image display chip projects an image on the curtain according to the control of the control signal.
As a further optimization of the present invention, in the step of the central control chip receiving the angle signal and forming the control signal, specifically: the angle signal acquired by the gravity sensor is a, a represents the rotation angle of the projector, the rotation angle a of the projector is the rotation angle relative to the horizontal plane, clockwise rotation is positive direction, anticlockwise rotation is negative direction, the acquisition module acquires the angle signal to form an acquisition signal a, the function of the memory in the calculation module is beta= -a, wherein beta represents the image rotation angle, the control module acquires the calculation signal beta formed in the calculation module, the control signal for controlling the rotation angle and the rotation direction of the image is formed according to the calculation signal, namely the formed control signal is that the rotation direction of the projection image is opposite to the rotation direction of the projector, the rotation angle of the projection image is identical to the rotation angle of the projector, the projection image changes along with the rotation of the projector, and the projection image is always kept to be an upright image.
As a further optimization of the present invention, in the step of the central control chip receiving the angle signal and forming the control signal, specifically: the angle signal obtained by the gravity sensor is a, a represents the rotation angle of the projector, the rotation angle a of the projector is relative to the horizontal plane, clockwise rotation is positive direction, anticlockwise rotation is negative direction, and the function of the memory in the calculation module is a piecewise function, specifically: beta is-180 DEG when a is 90 DEG and-270 DEG; when a is 270 DEG and-90 DEG, beta is 180 DEG, wherein beta represents an image rotation angle, the control module collects a calculation signal beta formed in the calculation module, and forms a control signal for controlling the image rotation angle and the rotation direction according to the calculation signal, so that when the projection image is switched between the projector table projection and the hanging projection, the projection image is controlled to be an upright image when the projector table projection or the hanging projection is carried out.
As a further optimization of the present invention, when the function of the memory in the calculation module is a piecewise function, β=a when 0°++. lal <90° or 90 ° < lal <270 ° or 270 ° < lal ++.360°.
Compared with the prior art, the invention has the advantages and positive effects that:
1. according to the invention, the gravity sensor is arranged in the projector, and the received signals in the gravity sensor are converted through the built-in central control chip, so that the rotation angle and rotation direction of the projection image are controlled, the projector is not limited by places, and the application range is wider;
2. the projection image control system and the projection image control method can not only realize the adjustment of the direction of the projection image along with the real-time change of occasions, but also only aim at the image adjustment when the table projection and the hanging projection are changed, thereby meeting different requirements.
Drawings
FIG. 1 is a schematic diagram of a projection control system according to the present invention;
FIG. 2 is a block diagram of a projection control method of the present invention;
in the above figures: 1. a projector; 2. a curtain.
Detailed Description
The present invention will be specifically described below by way of exemplary embodiments. It is to be understood that elements, structures, and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
In the description of the present invention, it should be noted that, directional terms, such as "upper", "lower", "front", "rear", etc., are used for describing the projector with reference to the projector being horizontally placed on a horizontal plane, and are merely for simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. In addition, the rotation of the projector according to the present invention means that the projector rotates around an axis perpendicular to the curtain.
Referring to fig. 1, a schematic diagram of a projection image control system according to the present invention is shown. As shown in fig. 1, the projection image control system of the present invention comprises a projector 1 capable of projecting a projection image onto a curtain 2, wherein a gravity sensor capable of sensing a rotation angle of the projector is arranged in the projector 1, and the gravity sensor senses the rotation angle of the projector to form an angle signal; the gravity sensor is electrically connected with a central control chip which is arranged in the projector, and the central control chip comprises an acquisition module which can acquire angle signals to form acquisition signals, a calculation module which is arranged in the central control chip and can calculate image rotation angles and rotation direction functions according to the acquisition signals, and a control module which can control the rotation angles and the rotation directions of projection images according to the calculation signals formed in the calculation module; the control module is electrically connected with an image display chip, and the image display chip controls the rotation angle and the rotation direction of the projection image on the curtain according to the control signal.
By the projection image control system, the gravity sensor is arranged in the projector, and the gravity sensor can sense the rotation angle change of the projector relative to the horizontal plane in real time, so that the projector can be placed at will according to the field requirement, and the projected image can be kept upright without being limited to the horizontal plane. Here, keeping the image upright means that the image is presented in conformity with the normal viewing direction of the user.
Referring to fig. 2, the present invention further provides a projection image control method, in which the projection image control system is used, and specifically includes the following steps:
starting the projector;
the gravity sensor knows the rotation angle of the projector:
the gravity sensor senses the gravity deflection direction and the deflection angle of the projector, calculates the rotation angle of the projector, and forms an angle signal;
the central control chip receives the angle signal and forms a control signal: the acquisition module in the central control chip acquires the angle signals to form acquisition signals and sends the acquisition signals to the calculation module, the calculation module calculates according to the acquisition signals and built-in calculated image rotation angles and rotation direction functions to form calculation signals, and the control module acquires the calculation signals and forms control signals for controlling the image rotation angles and rotation directions according to the calculation signals;
the image display chip projects an image on the curtain according to the control of the control signal.
In addition, in the step of receiving the angle signal and forming the control signal by the central control chip, the invention provides two embodiments, which are as follows:
in the first embodiment, in the step of the central control chip receiving the angle signal and forming the control signal, specifically: the angle signal acquired by the gravity sensor is a, a represents the rotation angle of the projector, the rotation angle a of the projector is the rotation angle relative to the horizontal plane, clockwise rotation is positive direction, anticlockwise rotation is negative direction, the acquisition module acquires the angle signal to form an acquisition signal a, the function of the memory in the calculation module is beta= -a, wherein beta represents the image rotation angle, the control module acquires the calculation signal beta formed in the calculation module, the control signal for controlling the rotation angle and the rotation direction of the image is formed according to the calculation signal, namely the formed control signal is that the rotation direction of the projection image is opposite to the rotation direction of the projector, the rotation angle of the projection image is identical to the rotation angle of the projector, the projection image changes along with the rotation of the projector, and the projection image is always kept to be an upright image.
For this embodiment, an example is illustrated: as shown in fig. 1, three angles XYZ of the projector are directional axes set in the present invention. Taking the horizontal direction perpendicular to the curtain as an X axis, automatically identifying a rotation coordinate by a gravity sensor when the projector rotates around the X axis, receiving the coordinate angle signal by a central control chip after starting functional service and forming a control signal, and making a calculation signal to rotate anticlockwise by an angle a DEG by a calculation module when the received angle signal is that the projector rotates around the X axis clockwise and the rotation angle is a DEG (0 DEG is less than or equal to a DEG and less than or equal to 360 DEG); when the projector rotates counterclockwise around the X axis, the calculation module makes a calculation signal rotating clockwise by a DEG when the rotation angle is a DEG (0 DEG is less than or equal to a DEG is less than or equal to 360 deg). The control module transmits the judging signal to the image display chip, and the image display chip performs corresponding processing on the image according to the command signal and transmits the processed image signal to the curtain. In this embodiment, the projector can be installed on any inclined surface, and the projected image can be an upright image, without being limited to a floor.
The second embodiment is embodied in that the projector can maintain an upright state of an image when the projector is in a desk throw state and a hanging state when the projector is in a hanging state when two states of the desk throw (i.e. a=0° or 360 °) and the hanging state are switched. In the step of receiving the angle signal and forming the control signal by the central control chip, the method specifically comprises the following steps: the angle signal obtained by the gravity sensor is a, a represents the rotation angle of the projector, the rotation angle a of the projector is relative to the horizontal plane, clockwise rotation is positive direction, anticlockwise rotation is negative direction, and the function of the memory in the calculation module is a piecewise function, specifically: beta is-180 DEG when a is 90 DEG and-270 DEG; when a is 270 degrees and-90 degrees, beta is 180 degrees, wherein beta represents an image rotation angle, a control module collects a calculation signal beta formed in a calculation module, and the control module forms a control signal for controlling the image rotation angle and the rotation direction according to the calculation signal, so that when a projection image is switched between a projector table projection and a hanging projection, the projection image is controlled to be an upright image when the projector table projection or the hanging projection is carried out.
In addition, when the function stored in the calculation module is a piecewise function, β=a when 0°++. lal <90° or 90 ° < lal <270 ° or 270 ° < lal +.360 °. I.e. the projected image of the projector rotates with the rotation of the projector, except at the four special points described above.
In this embodiment, when the projector is switched between the hanging position and the desk position, in order to make the projector an upright image when the projector reaches the hanging position or the desk position, the projection image is controlled to be turned 180 ° reversely when the projector is rotated to 90 ° or 270 ° in the switching process of the two states, and the state in which the projection image is turned is not limited to an angle value of 90 ° or 270 ° due to the difference in the speed of the rotating projector when the projector is rotated.
In the embodiment, only the projection images in the switching process of the two states of the table casting and the hanging casting are changed, the projection images in the switching process are not controlled, and the program is simple and easy to operate. The projector table projection means that the projector is 0 ° with respect to the horizontal plane, that is, in the present invention, the projector table projection is when a is 0 ° and ±360°; the hanging projection means that the projector and the desk projection are opposite, namely, in the invention, the hanging projection is carried out when a is 180 degrees. According to the embodiment, automatic switching between the table throwing and the hanging throwing is realized, manual switching in setting is not needed, and the automatic switching is more convenient.
Claims (2)
1. A projection image control system comprising a projector (1) for projecting a projection image onto a curtain (2), characterized by: a gravity sensor capable of sensing the rotation angle of the projector is arranged in the projector (1), and the gravity sensor senses the rotation angle of the projector to form an angle signal; the gravity sensor is electrically connected with a central control chip which is arranged in the projector (1), and the central control chip comprises an acquisition module which can acquire angle signals to form acquisition signals, a calculation module which can calculate image rotation angles and rotation direction functions according to the acquisition signals, and a control module which can control the rotation angles and the rotation directions of projection images according to the calculation signals formed in the calculation module; the control module is electrically connected with an image display chip, and the image display chip controls the rotation angle and the rotation direction of the projection image on the curtain according to the control signal;
the angle signal obtained by the gravity sensor is a, a represents the rotation angle of the projector, the rotation angle a of the projector is relative to the horizontal plane, clockwise rotation is positive direction, anticlockwise rotation is negative direction, the function of the memory in the calculation module is a piecewise function or the function of the memory in the calculation module is beta= -a;
when the function of the memory in the computing module is a piecewise function, the method specifically comprises the following steps: beta is-180 DEG when a is 90 DEG and-270 DEG; beta is 180 deg. when a is 270 deg. and-90 deg.; wherein beta represents an image rotation angle, a control module acquires a calculation signal beta formed in a calculation module, forms a control signal for controlling the image rotation angle and the rotation direction according to the calculation signal, controls a projection image to be an upright image when the projection image is switched between the projector table projection and the hanging projection, and beta=a when a function in a memory in the calculation module is a piecewise function and is more than or equal to 0 degree and less than 90 degrees or more than or equal to 90 degrees and less than or equal to 270 degrees and less than or equal to lal and less than or equal to 360 degrees;
when the function of the memory in the calculation module is beta= -a, the formed control signal is that the rotation direction of the projection image is opposite to the rotation direction of the projector, the rotation angle of the projection image is the same as the rotation angle of the projector, the projection image is changed along with the rotation of the projector, and the projection image is always kept to be an upright image.
2. A projection image control method is characterized in that: the method comprises the following steps:
starting a projector, wherein the projector is used for projecting a projection image on a curtain;
the gravity sensor knows the rotation angle of the projector: the gravity sensor senses the gravity deflection direction and the deflection angle of the projector, calculates the rotation angle of the projector and forms an angle signal, wherein the angle signal obtained by the gravity sensor is a, a represents the rotation angle of the projector, the rotation angle a of the projector is relative to the horizontal plane, and clockwise rotation is taken as a positive direction, and anticlockwise rotation is taken as a negative direction;
the central control chip receives the angle signal and forms a control signal: the acquisition module in the central control chip acquires the angle signals to form acquisition signals and sends the acquisition signals to the calculation module, the calculation module calculates according to the acquisition signals and built-in calculated image rotation angles and rotation direction functions to form calculation signals, and the control module acquires the calculation signals and forms control signals for controlling the image rotation angles and rotation directions according to the calculation signals;
the image display chip projects an image on the curtain according to the control of the control signal;
the function of the memory in the calculation module is a piecewise function or the function of the memory in the calculation module is beta= -a;
when the function of the memory in the computing module is a piecewise function, the method specifically comprises the following steps: beta is-180 DEG when a is 90 DEG and-270 DEG; beta is 180 deg. when a is 270 deg. and-90 deg.; wherein beta represents an image rotation angle, a control module acquires a calculation signal beta formed in a calculation module, forms a control signal for controlling the image rotation angle and the rotation direction according to the calculation signal, controls a projection image to be an upright image when the projection image is switched between the projector table projection and the hanging projection, and beta=a when a function in a memory in the calculation module is a piecewise function and is more than or equal to 0 degree and less than 90 degrees or more than or equal to 90 degrees and less than or equal to 270 degrees and less than or equal to lal and less than or equal to 360 degrees;
when the function of the memory in the calculation module is beta= -a, the formed control signal is that the rotation direction of the projection image is opposite to the rotation direction of the projector, the rotation angle of the projection image is the same as the rotation angle of the projector, the projection image is changed along with the rotation of the projector, and the projection image is always kept to be an upright image.
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| CN201610841278.0A CN106331551B (en) | 2016-09-22 | 2016-09-22 | Projection image control system and projection image control method |
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Denomination of invention: Projection Image Control System and Projection Image Control Method Effective date of registration: 20231208 Granted publication date: 20231013 Pledgee: China Pacific Property Insurance Co.,Ltd. Qingdao Branch Pledgor: QINGDAO XIAOSHUAI INTELLIGENT TECHNOLOGY CO.,LTD. Registration number: Y2023370010130 |