CN105491359B - Projection device, optical projection system and projecting method - Google Patents
Projection device, optical projection system and projecting method Download PDFInfo
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- CN105491359B CN105491359B CN201410538967.5A CN201410538967A CN105491359B CN 105491359 B CN105491359 B CN 105491359B CN 201410538967 A CN201410538967 A CN 201410538967A CN 105491359 B CN105491359 B CN 105491359B
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Abstract
The present invention provides a kind of projection device, optical projection system and projecting method.The projection device includes：Light source, for emitting the first light beam；Optical system, for projecting the first light beam from light source on projection target with pre-determined frame rate to form each pixel per frame image；Optical sensor, for detecting from the light intensity of the second light beam of each pixel point reflection to obtain the first reflected light intensity values of each pixel, second light beam is identical with the optical axis of first light beam and direction is opposite；And control unit, determine current pixel point with the presence or absence of interactively entering for the variation of the first reflected light intensity values according to current pixel point.
Description
Technical field
The present invention relates to the field of electronic equipment, more particularly it relates to a kind of projection device, optical projection system and throwing
Image method.
Background technology
At present, projection interactive device is more and more universal.User in the content of projection by performing operation, easily
Realize interaction.However, it is difficult easily to be detected that user on the projection surface inputs naturally at present.Usually pass through in the prior art
Increase the mode of camera or depth camera to detect.However, this causes, volume is larger and availability is poor.
For this reason, it may be desirable to provide a kind of projection device, optical projection system and projecting method, user's interaction can be easily detected
It inputs without providing additional camera components.
Invention content
According to one embodiment of the invention, a kind of projection device is provided, including：
Light source, for emitting the first light beam；
Optical system, it is every to be formed on projection target for being projected the first light beam from light source with pre-determined frame rate
Each pixel of frame image；
Optical sensor, for detecting from the light intensity of the second light beam of each pixel point reflection to obtain the of each pixel
One reflected light intensity values, second light beam is identical with the optical axis of first light beam and direction is opposite；And
Control unit, the variation for the first reflected light intensity values according to current pixel point determine whether current pixel point deposits
It is interactively entering.
Preferably, described control unit is further used for：
The incident light intensity values of each pixel are obtained from first light beam；
Calculate the first ratio of the first reflected light intensity values of current pixel point and the incident light intensity values of current pixel point；
By first ratio compared with a reference value, wherein a reference value is calculates in the case where not interactively entering
The reflected light intensity values of each pixel obtained and the ratio of incident light intensity values；
When the absolute value of the difference of first ratio and a reference value is more than predetermined threshold, determines that current pixel point exists and hand over
Mutually input.
Preferably, described control unit is further used for：
When determining in the presence of interactively entering, the reflective light intensity of each pixel of optical sensor detection is utilized, is formed
Every frame reflected image corresponding with every frame image；
Predetermined image processing is performed to every frame reflected image, corresponding interactive instruction is interactively entered with described so as to parse.
Preferably, first light beam includes the first color component of variation, the second color for showing project content
4th color component of component and third color component and fixed size,
Described control unit is further used for：
The incident light intensity values of the 4th color component of each pixel are obtained from first light beam；
Calculate the second reflected light intensity values of the 4th color component in the reflected light of current pixel point；
By the second reflected light intensity values compared with a reference value, wherein a reference value is in situation about not interactively entering
The reflected light intensity values of 4th color component of each pixel of lower acquisition；
When the absolute value of the difference of the second reflected light intensity values and a reference value is more than predetermined threshold, current pixel point is determined
In the presence of interactively entering.
Preferably, described control unit is further used for：
When determining in the presence of interactively entering, the reflective light intensity of each pixel of optical sensor detection is utilized, is formed
Every frame reflected image corresponding with every frame image；
Predetermined image processing is performed to every frame reflected image, corresponding interactive instruction is interactively entered with described so as to parse.
Preferably, the projection device further includes：
Mode switch element, for switching the operation mode of the projection device, wherein, the operation mould of the projection device
Formula includes projection mode and interactive mode, and in projection mode, the optical sensor does not detect reflective light intensity, in interactive mode
In, the optical sensor detects reflective light intensity.
Preferably, the optical system includes：
First controllable lens, are arranged in the light path of the first light beam sent out, and in projection mode described in control
First controllable lens are total reflection mirror, and in interactive mode, it is semi-permeable and semi-reflecting mirror to control the first controllable lens；
Fixed first total reflection mirror is arranged in the light path of first light beam, for being totally reflected first light
Beam；
Moveable second total reflection mirror is arranged in the light path of first light beam, for being totally reflected described first
Light beam, and project on projection target to be formed per frame image by first light beam with pre-determined frame rate by position movement
Each pixel and
Wherein, the optical sensor be arranged in the light path of second light beam, the positions of the first controllable lens
Below, and in interactive mode, the light intensity from the second light beam of the described first controllable lens transmission can be detected to obtain often
First reflected light intensity values of a pixel.
According to another embodiment of the present invention, a kind of optical projection system is provided, including：
Projection device, the projection device have the configuration of any projection device described above；And
Display unit is arranged on the projection target of the projection device, and has first state and the second state,
In said first condition, the display unit is in pellucidity, and in said second condition, the display unit is according to institute
The light operation of projection device transmitting is stated, so as to show project content on projection target.
Preferably, the display unit includes transmission-type display unit, is made with the visible ray of projection device transmitting
Display operation is performed for back light, so as to show project content on projection target.
Preferably, the display unit include transparent excitation film, using from the exciting light that the projection device emits as
Light source performs display operation.
According to another embodiment of the present invention, a kind of alternative projection method is provided, including：
The first light beam from light source is projected on projection target to be formed per each of frame image with pre-determined frame rate
Pixel；
It detects from the light intensity of the second light beam of each pixel point reflection to obtain the first reflected light intensity values of each pixel,
Second light beam is identical with the optical axis of first light beam and direction is opposite；And
It determines that current pixel point whether there is according to the variation of the first reflected light intensity values of current pixel point to interactively enter.
Preferably, the method further includes：
The incident light intensity values of each pixel are obtained from first light beam；
Calculate the first ratio of the first reflected light intensity values of current pixel point and the incident light intensity values of current pixel point；
By first ratio compared with a reference value, wherein a reference value is calculates in the case where not interactively entering
The reflected light intensity values of each pixel obtained and the ratio of incident light intensity values；
When the absolute value of the difference of first ratio and a reference value is more than predetermined threshold, determines that current pixel point exists and hand over
Mutually input.
Preferably, the method further includes：
When determining in the presence of interactively entering, the reflective light intensity of each pixel of optical sensor detection is utilized, is formed
Every frame reflected image corresponding with every frame image；
Predetermined image processing is performed to every frame reflected image, corresponding interactive instruction is interactively entered with described so as to parse.
Preferably, first light beam includes the first color component of variation, the second color for showing project content
4th color component of component and third color component and fixed size,
Preferably, the method further includes：
The incident light intensity values of the 4th color component of each pixel are obtained from first light beam；
Calculate the second reflected light intensity values of the 4th color component in the reflected light of current pixel point；
By the second reflected light intensity values compared with a reference value, wherein a reference value is in situation about not interactively entering
The reflected light intensity values of 4th color component of each pixel of lower acquisition；
When the absolute value of the difference of the second reflected light intensity values and a reference value is more than predetermined threshold, current pixel point is determined
In the presence of interactively entering.
Preferably, the method further includes：
When determining in the presence of interactively entering, using the reflective light intensity of each pixel of optical sensor detection, formed and every
Frame image is corresponding per frame reflected image；
Predetermined image processing is performed to every frame reflected image, corresponding interactive instruction is interactively entered with described so as to parse.
Therefore, projection device according to embodiments of the present invention, optical projection system and projecting method can easily detect user
It interactively enters without providing additional camera components.
Description of the drawings
Fig. 1 is the functional configuration block diagram for illustrating projection device according to a first embodiment of the present invention；
Fig. 2A and 2B is the configuration diagram for the optical system for illustrating projection device according to a first embodiment of the present invention；
Fig. 3 A-3C are the definition graphs of the identification for the interactive instruction for illustrating projection device according to a first embodiment of the present invention；
Fig. 4 is the functional configuration block diagram for illustrating projection device according to a second embodiment of the present invention；
Fig. 5 A and 5B are the structure charts for illustrating optical projection system according to a third embodiment of the present invention；
Fig. 6 A and 6B are the structure charts for illustrating optical projection system according to a fourth embodiment of the present invention；
Fig. 7 is the flow chart for illustrating projecting method according to a fifth embodiment of the present invention；And
Fig. 8 is the flow chart for illustrating projecting method according to a sixth embodiment of the present invention.
Specific embodiment
In the following, by projection device according to embodiments of the present invention, optical projection system and projecting method is described in detail with reference to the attached drawings.
<First embodiment>
As shown in Figure 1, projection device 100 according to a first embodiment of the present invention includes：
Light source 101, for emitting the first light beam；
Optical system 102, for being projected the first light beam from light source on projection target with shape with pre-determined frame rate
Into each pixel of every frame image；
Optical sensor 103, for detecting from the light intensity of the second light beam of each pixel point reflection to obtain each pixel
The first reflected light intensity values, second light beam is identical with the optical axis of first light beam and direction is opposite；And
Control unit 104, the variation for the first reflected light intensity values according to current pixel point determine that current pixel point is
No presence interactively enters.
Light source 101 can include one or more sub-light sources according to different demands.
For example, in one embodiment, light source 101 can include a sub-light source, so as to carry out monochromatic display.
In another embodiment, light source 101 can include three sub-light sources (e.g., R (red), G (green) and B (indigo plants
Color) sub-light source), for carrying out colored display.
In projection device 100 according to first embodiment, light source 101 includes three sub-light sources, that is, tri- sons of R, G and B
Light source.Three sub-light sources send out red, green and blue light respectively, and under the control of optical modulator (not shown), root
According to the light intensity of light that three sub-light sources of signal modulation of input are sent out, and formed on projection target by irradiation optical system
Picture material.
In projection device 100 according to a first embodiment of the present invention, optical system 102 is used for pre-determined frame rate (such as
25 frames/second etc.) line sequence scanning, the modulated flashlight made from light source 101 is projected on projection target pixel by pixel,
So as to form each pixel of every frame image.
Specifically, the projection signal's light for example since first pixel of most lastrow of optical system 102, and according to
The scanning sequency of S-shaped starts scanning projection, the projection until completing a frame image.Then, according to scheduled frame rate (such as 25
Frame/second) refreshed.
Optical sensor 103 for example can be rgb light sensor, infrared light transducer[sensor etc..The classification of optical sensor 103 is not
It is particularly limited to, but is determined according to specifically used scene.In the first embodiment, optical sensor 103 is rgb light sensor.Light
The quantity of sensor 103 can be one or more.
Optical sensor 103 is used to detect from the light intensity of the second light beam of each pixel point reflection to obtain each pixel
First reflected light intensity values.
Control unit 104 is such as can the realization as DSP (digital signal processor), CPU.The control unit 104 is used for
Each unit of projection device 100 is controlled, and current picture is determined according to the variation of the first reflected light intensity values of current pixel point
Vegetarian refreshments, which whether there is, to be interactively entered.
In the following, the working method that the projection device 100 will be described in detail with reference to Fig. 2A and Fig. 2 B.
Fig. 2A and Fig. 2 B show the brief configuration of the optical system 102 in projection device according to embodiments of the present invention
Figure.It should be noted that several major optical components are merely illustrated in the optical system 102, but those skilled in the art need
It is to be understood that according to different needs, different optical lenses or other optical modules can be increased to realize different needs.
As shown in Figure 2 A, which mainly includes the first controllable lens 1021, fixed first total reflection mirror
1022 and moveable second total reflection mirror 1023.
As shown in Figure 2 A, the first control lens 1021 are arranged in the light path of the first light beam that light source is sent out.For with it is rear
First total reflection mirror 1022 and the second total reflection mirror 1023 in face together project flashlight on projection target.
There are two types of operation modes for the first controllable tool of lens 1021, that is, projection mode and interactive mode.In projection mode,
The described first controllable lens 1021 can be controlled to become total reflection mirror, that is to say, that in the projection mode, light all throw by reflection
Without any loss on shadow to projection target.In addition, in interactive mode, it is semi-transparent to control the first controllable lens 1021
Half-reflecting mirror, that is to say, that at this point, the first controllable lens 1021 can either reflect the flashlight sent out from light source, moreover it is possible to
Transmission is from the reflected reflected light of pixel, so that the optical sensor 103 of lower section is able to detect that reflected light.
Fixed first total reflection mirror 1022 is arranged in the light path of first light beam, for being totally reflected first light
Beam.
Moveable second total reflection mirror 1023 is arranged in the light path of first light beam, for being totally reflected described first
Light beam.It should be noted that moveable second total reflection mirror 1023 can be moved according to the control of control unit by position
Sequentially project each pixel content.That is, moveable second total reflection mirror 1023 can be incited somebody to action with pre-determined frame rate
First light beam projects on projection target to form each pixel per frame image.
Fig. 2A and 2B shows the working condition of optical system 102 in an interactive mode.Fig. 2A is shown from light source
The process that first light beam (flashlight) is projected by the optical system 102.As shown in Figure 2 A, light incidence enters optical system 102
Afterwards, fixed first total reflection mirror 1022 is reflected to by the described first controllable lens 1021 first.Then, which is consolidated
The first fixed total reflection mirror 1022 is reflected to moveable second total reflection mirror 1023.Finally, moveable second total reflection
Mirror 1023 projects away the first light beam, and the first pixel (that is, P1) is formd on projection target.Similarly, it is removable by this
The movement of the second dynamic total reflection mirror 1023, project line by line the second pixel P2, third pixel P3 ..., until completing a frame
The projection of image.
Then, as shown in Figure 2 B, when entering interactive mode, detected at this time by optical sensor 103 from each pixel
The light intensity of reflected transmitting light.
It should be noted that because the reason of the light velocity, it is believed that the light of first pixel while projection is gone out,
It is reflected back to optical sensor 103 immediately.
In addition, when light is reflected from pixel P1, the second light beam on optical axis identical with the first light beam, the second light are only detected
The direction of beam is opposite with the first light beam.
Obviously, when being inputted there is no user, that is, there is no input part (such as user's finger, stylus on projection target
When), the light intensity per the reflected light of the same pixel point of frame image is identical.On the other hand, when there are during user's input, that is,
When there is no input part (such as user's finger, stylus) on projection target, per the light of the reflected light of the same pixel point of frame image
It is strong different.
Therefore, the light intensity of the transmitting light of each pixel detected by using optical sensor 103 changes, it may be determined that whether
There are user's inputs.
Specifically, in projection device 100 according to a first embodiment of the present invention, it is assumed that light source 101 uses R, G and B
Three sub-light sources shine, and the light being finally incident upon on projection target is the visible ray of mixing.
Because when projecting different content, the light intensity of each pixel is different, therefore, the light intensity of reflected light is inevitable also different.
At this point, it can not directly be inputted by the size of the light intensity of reflected light to determine whether there is user.
On the other hand, for each pixel, when being inputted there is no user, the light intensity of reflected light and incident light
The ratio of light intensity is identical.For example, for each pixel, when being inputted there is no user, it is assumed that reflected light is with entering
It is 1% to penetrate the ratio between light intensity of light.Consider signal fluctuation, interference, the reflection of projection target fluctuation, it may be determined that reflected light and incidence
In the range of the ratio between light intensity of light is 1% ± 0.3%.Therefore, it can set input by user predetermined for judging whether
It is, for example, 0.5% to deviate threshold value.
When there are during user's input, for each pixel, the ratio of the light intensity of reflected light and the light intensity of incident light
It is different.For example, for having for pixel input by user, it is assumed that the ratio between reflected light and the light intensity of incident light are 0.1%.It needs
It is noted that in the case of user input parts are components made of high reflecting rate material, it is assumed that reflected light and incident light
The ratio between light intensity is 2%.
For this purpose, described control unit 101 can obtain the incident light intensity values of each pixel from first light beam.Also
It is to say, control unit 101 can directly acquire the incident light of the first light beam (flashlight) to be transmitted according to the value of input signal
Intensity values.
Then, control unit 101 can obtain the reflective light intensity of the second light beam as reflected light from optical sensor 103
Value.Then, control unit 101 can calculate the first reflected light intensity values of current pixel point and the incident light intensity values of current pixel point
The first ratio.
Then, control unit 101 can be by first ratio compared with a reference value, wherein a reference value is is not having
The reflected light intensity values of each pixel of acquisition and the ratio of incident light intensity values are calculated in the case of interactively entering.
When the absolute value of the difference of first ratio and a reference value is more than predetermined threshold, control unit 101 determines current
Pixel, which exists, to be interactively entered.For example, in the case where ordinary user inputs, it is 0.1% to measure reflected light intensity values.At this point, the
The absolute value of the difference of one ratio and a reference value is 0.9%, and more than predetermined threshold (such as 0.5%), control unit 101 determines current picture
Vegetarian refreshments, which exists, to be interactively entered.
Alternatively, in the case where user input parts is components made of high reflecting rate material, measuring reflected light intensity values is
2%.At this point, the absolute value of the difference of the first ratio and a reference value is 1%, more than predetermined threshold (such as 0.5%), control unit 101
It determines that current pixel point exists to interactively enter.
For no pixel input by user, because the ratio substantially constant of transmitting light intensity and incident intensity (1% ±
0.3%) predetermined threshold 0.5%, is not above, so control unit 101 determines that there is no interactively enter current pixel point.
Because the light intensity of reflected light can be detected for each pixel, in a frame image, optical sensor can be passed through
Detection, form often frame reflected image corresponding with per frame image.
Then, for the multiframe reflected image of acquisition perform predetermined image processing, parsing with it is described interactively enter it is corresponding
Interactive instruction.
For example, as shown in figs. 3 a-3 c, by analyzing reflected image, it may be determined that the user hand as user input parts
Finger from left to right carries out slide.Therefore, it can be determined according to pre-defined interactive instruction corresponding with the slide
The interactive instruction input by user.It similarly, can be with by pre-defined interactive instruction collection corresponding with multiple slides
Determine each interactive instruction input by user.Then, it is defeated can to perform corresponding user according to the user instruction for control unit 104
Enter.
It should be noted that in one embodiment, the projection device 100 can also for example include：Pattern switching list
Member 105, for switching the operation mode of the projection device 100.The operation mode of the projection device 100 includes projection mode
And interactive mode.In projection mode, the optical sensor 103 does not detect reflective light intensity, in interactive mode, the light sensing
Device 103 detects reflective light intensity.
Specifically, as shown in Figure 2 A, the optical system 102 includes the first controllable lens 1021, and first is controllable
Lens 1021 control the described first controllable lens as total reflection mirror in projection mode, in interactive mode, the first controllable lens
1021 be semi-permeable and semi-reflecting mirror.In addition, the optical sensor 103 is arranged in the light path of second light beam, described first can
Behind the position for controlling lens 1021.Therefore, in interactive mode, reflected light is transmissive to through the first controllable lens 1021,
So optical sensor 103 can detect the light intensity from the second light beam of the described first controllable transmission of lens 1021 to obtain each picture
First reflected light intensity values of vegetarian refreshments.
Therefore, projection device according to embodiments of the present invention, because each picture can be detected by built-in optical sensor
The reflected light of vegetarian refreshments, so that it is determined that user's interactively enters, so additional offer camera components are not needed to, so can be significantly
Ground reduces the volume of projection device and reduces cost, and user-friendly.
<Second embodiment>
In the following, by projection device 400 according to a second embodiment of the present invention is described with reference to figure 4.
As shown in Figure 1, projection device 100 according to a first embodiment of the present invention includes：
Light source 401, for emitting the first light beam；
Optical system 402, for being projected the first light beam from light source on projection target with shape with pre-determined frame rate
Into each pixel of every frame image；
Optical sensor 403, for detecting from the light intensity of the second light beam of each pixel point reflection to obtain each pixel
The first reflected light intensity values, second light beam is identical with the optical axis of first light beam and direction is opposite；And
Control unit 404, the variation for the first reflected light intensity values according to current pixel point determine that current pixel point is
No presence interactively enters.
Different from the light source 101 of first embodiment, light source 401 in projection device 400 according to second embodiment can be with
Including being used to carry out three sub-light sources (e.g., R (red), G (green) and B (blue) sub-light source) of colored display and being used for
User interactively enters the 4th sub-light source of detection.Invisible light source may be used in 4th sub-light source, such as infrared light, ultraviolet light
Deng.In this example, it is assumed that the 4th sub-light source is infrared light supply.
Under the control of optical modulator (not shown), the light of light that is sent out according to three sub-light sources of signal modulation of input
By force, and by irradiation optical system picture material is formed on projection target.At the same time, user will be used for and interactively enters inspection
4th color component of the fixed size that the 4th sub-light source surveyed is sent out is added in flashlight.Because the 4th color component does not have to
In the colored display of progress, it is possible to be set as fixed size for each pixel.
Similarly, in projection device 400 according to a second embodiment of the present invention, optical system 402 is used for predetermined frame
The modulated flashlight made from light source 401 is projected projection by rate (such as 25 frames/second) line sequence scanning pixel by pixel
In target, so as to form each pixel of every frame image.
Optical system 402 is identical with the structure configuration of the optical system 101 in first embodiment, omits it herein and retouches in detail
It states.
It is different from the first embodiment, in a second embodiment, optical sensor 403 for example can be infrared light sensing
Device.
Optical sensor 403 is used to detect from the light intensity of the second light beam of each pixel point reflection to obtain each pixel
First reflected light intensity values.
Similarly, in projection device 400 according to a second embodiment of the present invention, control unit 404 for example can be by DSP
The realizations such as (digital signal processor), CPU.The control unit 404 is used to control each unit of projection device 400, and root
It determines that current pixel point whether there is according to the variation of the first reflected light intensity values of current pixel point to interactively enter.
Specifically, for each pixel because the size of the 4th color component (infrared light component) be it is known and
It is fixed, it is possible to by detecting the size from the infrared light component of each pixel point reflection, it is determined whether there are users
Input.
Obviously, when being inputted there is no user, that is, there is no input part (such as user's finger, stylus on projection target
When), the light intensity per the infrared external reflection light of the same pixel point of frame image is identical.On the other hand, when there are during user's input,
That is, when not having input part (such as user's finger, stylus) on projection target, often the same pixel point of frame image is infrared anti-
The light intensity for penetrating light is different.
Therefore, the light intensity of the transmitting light of each pixel detected by using optical sensor 403 changes, it may be determined that whether
There are user's inputs.
Specifically, in projection device 400 according to a second embodiment of the present invention, the first light beam includes throwing for showing
The first color component, the second color component and the third color component of the variation of shadow content and the 4th color of fixed size point
Amount.
Then, described control unit 404 can obtain the 4th color component of each pixel from first light beam
Incident light intensity values.Then, described control unit 404 can calculate of the 4th color component in the reflected light of current pixel point
Two reflected light intensity values.Then, described control unit 404 can be by the second reflected light intensity values compared with a reference value, wherein institute
State the reflected light intensity values for the 4th color component that a reference value is each pixel obtained in the case where not interactively entering.Most
Afterwards, when the absolute value of the difference of the second reflected light intensity values and a reference value is more than predetermined threshold, described control unit 404 can be with
It determines that current pixel point exists to interactively enter.
Similarly, because the light intensity of reflected light can be detected for each pixel, in a frame image, light can be passed through
The detection of sensor is formed corresponding with per frame image per frame reflected image.
Then, for the multiframe reflected image of acquisition perform predetermined image processing, parsing with it is described interactively enter it is corresponding
Interactive instruction.
For example, as shown in figs. 3 a-3 c, by analyzing reflected image, it may be determined that the user hand as user input parts
Finger from left to right carries out slide.Therefore, it can be determined according to pre-defined interactive instruction corresponding with the slide
The interactive instruction input by user.It similarly, can be with by pre-defined interactive instruction collection corresponding with multiple slides
Determine each interactive instruction input by user.Then, it is defeated can to perform corresponding user according to the user instruction for control unit 404
Enter.
Similarly, the projection device 400 can also for example include：Mode switch element 405, for switching the projection
The operation mode of equipment 400.The operation mode of the projection device 400 includes projection mode and interactive mode.In projection mode
In, the optical sensor 403 does not detect reflective light intensity, and in interactive mode, the optical sensor 403 detects reflective light intensity.
Therefore, projection device according to embodiments of the present invention, because each picture can be detected by built-in optical sensor
The reflected light of vegetarian refreshments, so that it is determined that user's interactively enters, so additional offer camera components are not needed to, so can be significantly
Ground reduces the volume of projection device and reduces cost, and user-friendly.
<3rd embodiment>
In the following, by the optical projection system with reference to figure 5A and 5B description according to a third embodiment of the present invention.
As shown in Figure 5A, which includes projection device 501 and display unit 502.
Projection device 501 can be the projection device 100 or 400 described in first embodiment above and second embodiment,
It omits the detailed description herein.
Display unit 502 is arranged on the projection target of the projection device.In this example, it is assumed that projection target is
Transparent glass table.It should be noted that projection target can be any transparent substance, such as glass wall, glass drawing board etc..
The display unit 502 has first state and the second state.In said first condition, the display unit 502
In pellucidity.
On the other hand, in said second condition, the light that the display unit 502 emits according to the projection device 501
Operation, so as to show project content on projection target.
Specifically, in the present embodiment, which can for example include transmission-type display unit.When described
When display unit 502 enters the second state, when the projection device starts projection operation, at this point, the light source hair of emissive devices
The visible ray penetrated can perform display operation as the back light of the display unit, so as to be shown on projection target in projection
Hold.
Then, as shown in Figure 5 B, when user performs user's input on the display unit, for example, when user is existed with finger
When user's input is performed in the content shown on display unit, projection device 501 can be detected by built-in optical sensor and be used
Family inputs, and parses the interactive instruction of user, so as to perform corresponding operation.
Therefore, optical projection system according to embodiments of the present invention, because can be examined by the optical sensor built in projection device
The reflected light of each pixel is surveyed, so that it is determined that user's interactively enters, so additional offer camera components are not provided, so
The volume of projection device can be greatly reduced and reduce cost, and user-friendly.
<Fourth embodiment>
In the following, by the optical projection system with reference to figure 6A and 6B description according to a fourth embodiment of the present invention.
As shown in Figure 6A, which includes projection device 601 and display unit 602.
Projection device 601 can be the projection device 100 or 400 described in first embodiment above and second embodiment,
It omits the detailed description herein.
Display unit 602 is arranged on the projection target of the projection device.In this example, it is assumed that projection target is
Transparent glass table.It should be noted that projection target can be any transparent substance, such as glass wall, glass drawing board etc..
The display unit 602 has first state and the second state.In said first condition, the display unit 602
In pellucidity.
On the other hand, in said second condition, the light that the display unit 602 emits according to the projection device 601
Operation, so as to show project content on projection target.
Specifically, in the present embodiment, the display unit 602 is for example including transparent excitation film.It, should in the second state
The excitation that the substance of such as fluorescent powder in excitation film is emitted from the projection device, so as to send out visible ray, because
This performs display operation.
For example, in this embodiment, the exciting light projected from projection device 601 is the ultraviolet light of specific wavelength.Also
It is to say, in this embodiment, the light source used in projection device 601 is ultraviolet source.
The ultraviolet source can also be modulated by input signal, thus when projecting on transparent excitation film, it can be every
A pixel have different ultraviolet lights light intensity, so as to the excitation film sent out at each pixel it is corresponding with input signal
The light of color, so as to perform display operation.
Then, as shown in Figure 6B, when user performs user's input on the display unit, for example, when user is existed with finger
When user's input is performed in the content shown on display unit, projection device 601 can be detected by built-in optical sensor and be used
Family inputs, and parses the interactive instruction of user, so as to perform corresponding operation.
Therefore, optical projection system according to embodiments of the present invention, because can be examined by the optical sensor built in projection device
The reflected light of each pixel is surveyed, so that it is determined that user's interactively enters, so additional offer camera components are not provided, so
The volume of projection device can be greatly reduced and reduce cost, and user-friendly.
<5th embodiment>
In the following, by projecting method 700 according to a fifth embodiment of the present invention is described with reference to figure 7.The projecting method 700 is for example
Applied in projection device 100 according to first embodiment.
As shown in fig. 7, projecting method 700 according to a fifth embodiment of the present invention includes：
Step S701：The first light beam from light source is projected on projection target to be formed per frame figure with pre-determined frame rate
Each pixel of picture；
Step S702：Detection is anti-to obtain the first of each pixel from the light intensity of the second light beam of each pixel point reflection
Light intensity value is penetrated, second light beam is identical with the optical axis of first light beam and direction is opposite；And
Step S703：Determine current pixel point with the presence or absence of friendship according to the variation of the first reflected light intensity values of current pixel point
Mutually input.
Specifically, in step S703, current pixel is determined according to the variation of the first reflected light intensity values of current pixel point
Point, which whether there is to interactively enter, to be further included：
Step S704：The incident light intensity values of each pixel are obtained from first light beam；
Step S705：Calculate the first of the first reflected light intensity values of current pixel point and the incident light intensity values of current pixel point
Ratio；
Step S706：By first ratio compared with a reference value, wherein a reference value is not interactively entering
In the case of calculate acquisition each pixel reflected light intensity values and incident light intensity values ratio；
Step S707：When the absolute value of the difference of first ratio and a reference value is more than predetermined threshold, current picture is determined
Vegetarian refreshments, which exists, to be interactively entered.
Therefore, projecting method according to embodiments of the present invention, because can be examined by the optical sensor built in projection device
The reflected light of each pixel is surveyed, so that it is determined that user's interactively enters, so additional offer camera components are not provided, so
The volume of projection device can be greatly reduced and reduce cost, and user-friendly.
<Sixth embodiment>
In the following, by projecting method 800 according to a sixth embodiment of the present invention is described with reference to figure 8.The projecting method 800 is for example
Applied in projection device 400 according to first embodiment.
As shown in figure 8, projecting method 800 according to a fifth embodiment of the present invention includes：
Step S801：The first light beam from light source is projected on projection target to be formed per frame figure with pre-determined frame rate
Each pixel of picture；
Step S802：Detection is anti-to obtain the first of each pixel from the light intensity of the second light beam of each pixel point reflection
Light intensity value is penetrated, second light beam is identical with the optical axis of first light beam and direction is opposite；And
Step S803：Determine current pixel point with the presence or absence of friendship according to the variation of the first reflected light intensity values of current pixel point
Mutually input.
As described in above description, first light beam include for show project content variation the first color
4th color component of component, the second color component and third color component and fixed size.
Therefore, specifically, in step S803, the variation of the first reflected light intensity values according to current pixel point determines
Current pixel point, which whether there is to interactively enter, to be further included：
Step S804：The incident light intensity values of the 4th color component of each pixel are obtained from first light beam；
Step S805：Calculate the second reflected light intensity values of the 4th color component in the reflected light of current pixel point；
Step S806：By the second reflected light intensity values compared with a reference value, wherein a reference value is is not interacting
The reflected light intensity values of 4th color component of each pixel obtained in the case of input；
Step S807：When the absolute value of the difference of the second reflected light intensity values and a reference value is more than predetermined threshold, determine
Current pixel point, which exists, to be interactively entered.
Therefore, projecting method according to embodiments of the present invention, because can be examined by the optical sensor built in projection device
The reflected light of each pixel is surveyed, so that it is determined that user's interactively enters, so additional offer camera components are not provided, so
The volume of projection device can be greatly reduced and reduce cost, and user-friendly.
It should be noted that its functional unit is illustrate only in projection device of the diagram according to each embodiment, and
The connection relation of each functional unit is not specifically described, it will be appreciated by persons skilled in the art that each functional unit can
Suitably to be connected by bus, internal connection line etc., such connection is well known to those skilled in the art.
It should be noted that in the present specification, term " comprising ", "comprising" or its any other variant are intended to
Non-exclusive inclusion, so that process, method, article or equipment including a series of elements not only will including those
Element, but also including other elements that are not explicitly listed or further include as this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
Also there are other identical elements in process, method, article or equipment including the element.
Finally, it is to be noted that, a series of above-mentioned processing are not only included with sequence described here in temporal sequence
The processing of execution, and the processing including performing parallel or respectively rather than in chronological order.
Through the above description of the embodiments, those skilled in the art can be understood that the present invention can be by
Software adds the mode of required hardware platform to realize, naturally it is also possible to all be implemented by hardware.Based on such understanding,
Technical scheme of the present invention can be embodied in the form of software product in whole or in part to what background technology contributed,
The computer software product can be stored in storage medium, such as ROM/RAM, magnetic disc, CD, including some instructions making
Computer equipment (can be personal computer, server or the network equipment etc.) performs each embodiment of the present invention
Or the method described in certain parts of embodiment.
The present invention is described in detail above, specific case used herein is to the principle of the present invention and embodiment party
Formula is expounded, and the explanation of above example is only intended to facilitate the understanding of the method and its core concept of the invention；It is meanwhile right
In those of ordinary skill in the art, thought according to the present invention has change in specific embodiments and applications
Part, in conclusion the content of the present specification should not be construed as limiting the invention.
Claims (11)
1. a kind of projection device, including：
Light source, for emitting the first light beam；
Optical system, for projecting on projection target to be formed per frame figure by the first light beam from light source with pre-determined frame rate
Each pixel of picture；
Optical sensor, it is anti-to obtain the first of each pixel from the light intensity of the second light beam of each pixel point reflection for detecting
Light intensity value is penetrated, second light beam is identical with the optical axis of first light beam and direction is opposite；And
Control unit determines current pixel point with the presence or absence of friendship for the variation of the first reflected light intensity values according to current pixel point
Mutually input；
Wherein, described control unit is further used for：
When determining in the presence of interactively entering, using the reflective light intensity of each pixel of optical sensor detection, formed and every
Frame image is corresponding per frame reflected image；
Predetermined image processing is performed to every frame reflected image, corresponding interactive instruction is interactively entered with described so as to parse.
2. projection device as described in claim 1, wherein, described control unit is further used for：
The incident light intensity values of each pixel are obtained from first light beam；
Calculate the first ratio of the first reflected light intensity values of current pixel point and the incident light intensity values of current pixel point；
By first ratio compared with a reference value, wherein a reference value is to calculate to obtain in the case where not interactively entering
Each pixel reflected light intensity values and incident light intensity values ratio；
When the absolute value of the difference of first ratio and a reference value is more than predetermined threshold, it is defeated to determine that current pixel point has interaction
Enter.
3. projection device as described in claim 1, wherein, first light beam includes the variation for showing project content
4th color component of the first color component, the second color component and third color component and fixed size,
Described control unit is further used for：
The incident light intensity values of the 4th color component of each pixel are obtained from first light beam；
Calculate the second reflected light intensity values of the 4th color component in the reflected light of current pixel point；
By the second reflected light intensity values compared with a reference value, wherein a reference value is obtains in the case where not interactively entering
The reflected light intensity values of 4th color component of each pixel obtained；
When the absolute value of the difference of the second reflected light intensity values and a reference value is more than predetermined threshold, determine that current pixel point exists
It interactively enters.
4. projection device as described in claim 1, further includes：
Mode switch element, for switching the operation mode of the projection device, wherein, the operation mode packet of the projection device
Projection mode and interactive mode are included, in projection mode, the optical sensor does not detect reflective light intensity, in interactive mode, institute
State optical sensor detection reflective light intensity.
5. projection device as claimed in claim 4, wherein, the optical system includes：
First controllable lens, are arranged in the light path of the first light beam sent out, and described first is controlled in projection mode
Controllable lens are total reflection mirror, and in interactive mode, it is semi-permeable and semi-reflecting mirror to control the first controllable lens；
Fixed first total reflection mirror is arranged in the light path of first light beam, for being totally reflected first light beam；
Moveable second total reflection mirror is arranged in the light path of first light beam, for being totally reflected first light beam,
And first light beam is projected on projection target to be formed per the every of frame image with pre-determined frame rate by position movement
A pixel and
Wherein, the optical sensor is arranged in the light path of second light beam, behind the position of the first controllable lens,
And in interactive mode, the light intensity from the second light beam of the described first controllable lens transmission can be detected to obtain each pixel
First reflected light intensity values of point.
6. a kind of optical projection system, including：
Claim 1-5 it is any as described in projection device；And
Display unit is arranged on the projection target of the projection device, and with first state and the second state, in institute
It states under first state, the display unit is in pellucidity, and in said second condition, the display unit is according to the throwing
The light operation of shadow equipment transmitting, so as to show project content on projection target.
7. optical projection system as claimed in claim 6, wherein,
The display unit includes transmission-type display unit, and the visible ray emitted using the projection device is held as back light
Row display operation, so as to show project content on projection target.
8. optical projection system as claimed in claim 6, wherein,
The display unit includes transparent excitation film, and display is performed as light source using the exciting light emitted from the projection device
Operation.
9. a kind of alternative projection method, applied to projection device, the method includes：
The first light beam from light source is projected on projection target with each pixel of the every frame image of formation with pre-determined frame rate
Point；
It detects from the light intensity of the second light beam of each pixel point reflection to obtain the first reflected light intensity values of each pixel, it is described
Second light beam is identical with the optical axis of first light beam and direction is opposite；And
It determines that current pixel point whether there is according to the variation of the first reflected light intensity values of current pixel point to interactively enter；
When determining in the presence of interactively entering, using the reflective light intensity of each pixel of detection, formed corresponding with per frame image
Per frame reflected image；
Predetermined image processing is performed to every frame reflected image, corresponding interactive instruction is interactively entered with described so as to parse.
10. method as claimed in claim 9, wherein, the variation of the first reflected light intensity values according to current pixel point is true
Determine current pixel point and further include with the presence or absence of interactively entering：
The incident light intensity values of each pixel are obtained from first light beam；
Calculate the first ratio of the first reflected light intensity values of current pixel point and the incident light intensity values of current pixel point；
By first ratio compared with a reference value, wherein a reference value is to calculate to obtain in the case where not interactively entering
Each pixel reflected light intensity values and incident light intensity values ratio；
When the absolute value of the difference of first ratio and a reference value is more than predetermined threshold, it is defeated to determine that current pixel point has interaction
Enter.
11. method as claimed in claim 9, wherein, first light beam include for show project content variation the
4th color component of one color component, the second color component and third color component and fixed size and
The variation of the first reflected light intensity values according to current pixel point determines that current pixel point whether there is and interactively enters also
Including：
The incident light intensity values of the 4th color component of each pixel are obtained from first light beam；
Calculate the second reflected light intensity values of the 4th color component in the reflected light of current pixel point；
By the second reflected light intensity values compared with a reference value, wherein a reference value is obtains in the case where not interactively entering
The reflected light intensity values of 4th color component of each pixel obtained；
When the absolute value of the difference of the second reflected light intensity values and a reference value is more than predetermined threshold, determine that current pixel point exists
It interactively enters.
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| CN106094405B (en) | 2016-06-03 | 2017-11-21 | 海信集团有限公司 | Projected picture correcting method, device and projector |
| CN107247384B (en) * | 2017-07-31 | 2020-07-03 | 歌尔股份有限公司 | Brightness compensation data acquisition system and method, image brightness adjustment method and device |
| CN107422926B (en) * | 2017-08-01 | 2020-12-18 | 英华达（上海）科技有限公司 | Input method and device |
| CN110161786B (en) * | 2018-02-12 | 2021-08-31 | 深圳富泰宏精密工业有限公司 | Light projection module, three-dimensional image sensing device and sensing method thereof |
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| CN1701603A (en) * | 2003-08-06 | 2005-11-23 | 三菱电机株式会社 | Method and system for determining correspondence between locations on display surface having arbitrary shape and pixels in output image of projector |
| CN1808265A (en) * | 2005-01-20 | 2006-07-26 | 株式会社日立制作所 | Projection-type display apparatus and multiscreen display apparatus |
| CN101268402A (en) * | 2005-09-21 | 2008-09-17 | 松下电器产业株式会社 | image projection device |
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| CN101776836B (en) * | 2009-12-28 | 2013-08-07 | 武汉全真光电科技有限公司 | Projection display system and desktop computer |
| JP5408278B2 (en) * | 2011-03-28 | 2014-02-05 | カシオ計算機株式会社 | Projection apparatus, projection method, and program |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1701603A (en) * | 2003-08-06 | 2005-11-23 | 三菱电机株式会社 | Method and system for determining correspondence between locations on display surface having arbitrary shape and pixels in output image of projector |
| CN1808265A (en) * | 2005-01-20 | 2006-07-26 | 株式会社日立制作所 | Projection-type display apparatus and multiscreen display apparatus |
| CN101268402A (en) * | 2005-09-21 | 2008-09-17 | 松下电器产业株式会社 | image projection device |
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