WO2020253387A1 - 投影方法及装置 - Google Patents

投影方法及装置 Download PDF

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Publication number
WO2020253387A1
WO2020253387A1 PCT/CN2020/087351 CN2020087351W WO2020253387A1 WO 2020253387 A1 WO2020253387 A1 WO 2020253387A1 CN 2020087351 W CN2020087351 W CN 2020087351W WO 2020253387 A1 WO2020253387 A1 WO 2020253387A1
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WO
WIPO (PCT)
Prior art keywords
light source
signal
laser light
unit
laser
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2020/087351
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English (en)
French (fr)
Inventor
陈许
肖纪臣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Hisense Laser Display Co Ltd
Original Assignee
Qingdao Hisense Laser Display Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qingdao Hisense Laser Display Co Ltd filed Critical Qingdao Hisense Laser Display Co Ltd
Publication of WO2020253387A1 publication Critical patent/WO2020253387A1/zh
Priority to US17/556,345 priority Critical patent/US11829057B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H04N9/315—Modulator illumination systems
    • H04N9/3161—Modulator illumination systems using laser light sources
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2086—Security or safety means in lamp houses
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/142—Adjusting of projection optics
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2066—Reflectors in illumination beam
    • 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]
    • 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
    • H04N9/315—Modulator illumination systems
    • H04N9/3155—Modulator illumination systems for controlling the light source
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

Definitions

  • This application relates to the field of laser projection technology, and in particular to a projection method and device.
  • the laser projection equipment includes a laser projector and a display screen.
  • the laser projector includes a laser light source control unit, a multimedia board unit and a laser light source.
  • the laser projector can project laser light to the display screen according to the picture to be displayed to display the picture on the display screen.
  • an embodiment of the present application provides a projection device, including: a detection unit, a multimedia board unit, a laser light source control unit, and a laser light source unit;
  • the detection unit is configured to send the detection signal to the laser light source control unit when receiving a detection signal for detecting whether there is an object to be protected in the laser projection area;
  • the laser light source control unit is configured to receive the detection signal within a period of time after receiving a power-on instruction and before the multimedia board unit is started, and determine the laser projection of the laser light source unit based on the detection signal
  • an adjustment signal is sent to the laser light source unit, the adjustment signal carries adjusted projection parameters, and the projection parameter is used to instruct to adjust the light emission of at least one laser light source in the laser light source unit brightness;
  • the laser light source unit is used to emit light under the control of the adjustment signal.
  • a projection method in a second aspect, includes:
  • the detection unit When the detection unit receives a detection signal for detecting whether there is an object to be protected in the laser projection area, sending the detection signal to the laser light source control unit;
  • the laser light source control unit receives the detection signal within a period of time after receiving the power-on instruction and before the multimedia board unit is started, and when it is determined based on the detection signal that there is an object to be protected in the laser projection area of the laser light source unit Sending an adjustment signal to the laser light source unit, the adjustment signal carrying adjusted projection parameters, the projection parameter being used to instruct to adjust the luminous brightness of at least one laser light source in the laser light source unit;
  • the laser light source unit emits light under the control of the adjustment signal.
  • Figure 1 is a block diagram of a projection device in the related art
  • Figure 2 is a block diagram of a projection device provided by an embodiment of the present application.
  • FIG. 3 is a block diagram of another projection device provided by an embodiment of the present application.
  • FIG. 4 is a block diagram of still another projection device provided by an embodiment of the present application.
  • FIG. 5 is a block diagram of another projection device provided by an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a projection device provided by an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of another projection device provided by an embodiment of the present application.
  • FIG. 8 is a flowchart of a projection method provided by an embodiment of the present application.
  • FIG. 9 is a flowchart of another projection method provided by an embodiment of the present application.
  • FIG. 10 is a flowchart of another projection method provided by an embodiment of the present application.
  • the projection device 100 includes: a sensor unit 101, a signal conversion unit 102, a multimedia board unit 103, a laser light source control unit 104, a light source driving unit 105, and a laser light source Unit 106.
  • the multimedia board unit 103 includes: a first logic control module 1031 and a multimedia main control module 1032.
  • the laser light source control unit 104 includes a second logic control module 1041 and a display driving module 1042.
  • the laser is a high-energy light source.
  • the laser When the laser is irradiated to the human eye, it will cause great damage to the human eye. Therefore, it is necessary to configure the eye protection function in the laser projection device to reduce the damage to the human eye by the laser projection device.
  • the sensor unit 101 is used to detect whether there is a thermal infrared signal in the laser projection area of the laser light source unit 106, convert the detected thermal infrared signal into a detection electrical signal, and send it to the signal conversion unit 102 sends the detection electrical signal.
  • the signal conversion unit 102 is configured to convert the detection electrical signal into a pulse signal, and send the pulse signal to the first logic control module 1031.
  • the first logic control module 1031 is used to determine whether there are people in the laser projection area based on the pulse signal, and when there are people in the laser projection area, send an effective level signal to the multimedia main control module 1032 to notify the multimedia main control module 1032 of the laser projection There are people in the area.
  • the multimedia main control module 1032 is configured to send a first notification signal to the second logic control module 1041 to notify the second logic control module 1041 that there is a person in the laser projection area when the effective level signal is received.
  • the second logic control module 1041 is configured to send a second notification signal to the display driving module 1042 after receiving the first notification signal to notify the display driving module 1042 that there is a person in the laser projection area.
  • the display driving module 1042 is used to adjust the projection parameters, and sends an adjustment signal carrying the adjusted projection parameters to the light source driving unit 105, and the light source driving unit 105 is used to send the laser light to the laser based on the adjustment signal.
  • the light source unit 106 provides a driving signal to adjust the brightness of the light emitted by at least one laser light source in the laser light source unit 106, and even control the laser light source unit 106 to stop emitting light.
  • the second logic control module 1041 is also used to send an enable signal at an effective level to the light source driving unit 105 to control the input of the adjustment signal to the light source driving unit 105.
  • the multimedia main control module 1032 can read the signal sent by the first logic control module 1031 after the startup is completed. However, since the activation time of the multimedia main control module 1032 is generally longer than the activation time of the laser light source unit 106, that is, the multimedia main control module 1032 is usually activated after the laser light source unit 106. Then in the period before the start of the laser light source unit 106 is completed and the multimedia main control module 1032 is completed, since the multimedia main control module 1032 cannot read the effective level signal sent by the first logic control module 1031, even if the laser There are people in the projection area, and the multimedia main control module 1032 cannot send the first notification signal to the second logic control module 1041.
  • the second logic control module 1041 cannot send the second notification signal to the display driver module 1042, which further leads to the display driver module 1042.
  • the inability to send the adjustment signal carrying the adjusted projection parameters to the light source driving unit 105 results in the inability to realize the human eye protection function. Therefore, the safety of the projection device 100 in the related art is low.
  • the projection device 200 includes a detection unit 201, a multimedia board unit 202, a laser light source control unit 203, and a laser light source unit 204.
  • the detection unit 201 is configured to send a detection signal to the laser light source control unit 203 when receiving a detection signal for detecting whether there is an object to be protected in the laser projection area.
  • the laser light source control unit 203 is used to receive a detection signal in the period after receiving the power-on instruction and before the multimedia board unit 202 is started, and when it is determined based on the detection signal that there is an object to be protected in the laser projection area of the laser light source unit 204 , Sending an adjustment signal to the laser light source unit 204, where the adjustment signal carries the adjusted projection parameter, and the projection parameter is used to instruct to adjust the luminous brightness of at least one laser light source in the laser light source unit 204.
  • the object to be protected may be a living body.
  • the object to be protected may be a person.
  • the laser light source unit 204 is used to emit light under the control of the adjustment signal.
  • the laser light source control unit determines that there is an object to be protected in the laser projection area of the laser light source unit within the period after receiving the power-on instruction and before the multimedia board unit is started.
  • the laser light source unit emits light based on the adjusted projection parameters.
  • the multimedia board unit instructs the laser light source control unit to adjust the projection parameters, but the multimedia board unit is in the laser The start-up of the light source unit is completed afterwards. Therefore, compared with the related technology, the laser light source control unit can instruct the laser light source unit to emit light based on the adjusted projection parameters in the projection device provided by the embodiment of the present application before the multimedia board unit is started.
  • the projection device After receiving the power-on instruction, the projection device can realize the human eye protection function, thereby improving the safety of the projection device.
  • FIG. 3 is a block diagram of another projection device 200 provided by an embodiment of the application.
  • the detection unit 201 includes a sensor module 2011 and a signal conversion module 2012.
  • the sensor module 2011 is used to collect infrared signals from the object to be protected. , Convert the collected infrared signal into a sensor signal, and send the sensor signal to the signal conversion module 2012, the signal type of the sensor signal is an electrical signal.
  • the signal conversion module 2012 is configured to convert the sensing signal into a detection signal when receiving the sensing signal, and send the detection signal to the laser light source control unit 203.
  • the laser light source unit 204 includes a light source driving module 2041 and a light source module 2042.
  • the light source driving module 2041 is configured to receive an adjustment signal sent by the laser light source control unit 203, and provide a driving signal to the light source module 2042 based on the adjustment signal.
  • the light source module 2042 is used to emit light under the driving of the driving signal.
  • the light source module 2042 may include devices such as a laser and a digital micromirror device (Digital Micromirror Device, DMD).
  • the DMD may include multiple light valves (also called micro lenses) arranged in an array, and the multiple light valves may correspond to multiple pixels in the image to be displayed. Generally, multiple light valves correspond to multiple pixels in a one-to-one correspondence.
  • the adjustment signal may be a pulse width modulation (Pulse Width Modulation, PWM) signal.
  • PWM Pulse Width Modulation
  • the implementation of the adjusted projection parameter carried in the PWM signal may be: for different values of the projection parameter, the duty cycle of the corresponding PWM signal is set, that is, the value of the projection parameter is reflected by the duty cycle.
  • the laser light source control unit 203 can send to the light source driving module 2041 a PWM signal corresponding to red light, a PWM signal corresponding to green light, a PWM signal corresponding to blue light, and a PWM signal corresponding to yellow light.
  • the light source driving module 2041 can determine the adjusted projection parameters corresponding to each color according to the adjusted projection parameters carried in the PWM signals corresponding to the received light of each color, and provide driving signals to the light source module 2042 based on the adjusted projection parameters , To control the light source module 2042 to emit light that meets the above-mentioned projection parameters, thereby changing the light emitting effect of the light source module 2042.
  • Changing the light emitting effect of the light source module 2042 includes: reducing the brightness of the light source module 2042 or turning off the light source module 2042.
  • the laser light source control unit 203 sends an adjustment signal to the light source drive module 2041, it can also send an enable signal (Enable signal) at an effective level to the light source drive module 2041 to control the aforementioned PWM signal input to the Light source drive module 2041.
  • an enable signal Enable signal
  • the projection device 200 implements projection display in multiple ways.
  • the embodiment of the present application uses the following two embodiments, and the detection unit 201 includes a sensor module 2011 and a signal conversion module 2012, and the laser light source unit 204 includes
  • the light source driving module 2041 and the light source module 2042 are taken as examples, and the implementation manner of the projection device 200 to achieve projection display will be described.
  • FIG. 4 is a block diagram of another projection device provided by an embodiment of the application.
  • the projection device 200 includes a detection unit 201, a multimedia board unit 202, a laser light source control unit 203, and a laser light source unit 204.
  • the detection unit 201 includes a sensor module 2011 and a signal conversion module 2012
  • the laser light source unit 204 includes a light source driving module 2041 and a light source module 2042.
  • the working process of the projection device 200 is different before and after the multimedia board unit 202 is started up, the working principle of the projection device before and after the multimedia board unit 202 is started up is described in the first embodiment. .
  • the working principle of the projection device 200 includes:
  • the sensor module 2011 is used to collect the infrared signal from the object to be protected, convert the collected infrared signal into a sensor signal, and send the sensor signal to the signal conversion module 2012, and the signal type of the sensor signal is an electrical signal.
  • the signal conversion module 2012 is configured to convert the sensing signal into a detection signal when receiving the sensing signal, and send the detection signal to the laser light source control unit 203.
  • the laser light source control unit 203 is used to receive the detection signal and determine whether there is an object to be protected in the laser projection area of the laser light source unit 204 based on the detection signal.
  • the laser light source control unit 203 adjusts the projection
  • the adjustment signal is sent to the light source driving module 2041, and the adjustment signal carries the adjusted projection parameter.
  • the projection parameter is used to instruct to adjust the luminous brightness of at least one laser light source in the laser light source unit 204.
  • the light source driving module 2041 is configured to provide a driving signal to the light source module 2042 based on the adjustment signal.
  • the light source module 2042 is used to emit light under the driving of a driving signal.
  • the laser light source control unit 203 includes: a first logic control module 2031 and a display driving module 2032.
  • the first logic control module 2031 is used to receive the detection signal and determine whether there is an object to be protected in the laser projection area based on the detection signal. When it is determined that there is an object to be protected in the laser projection area, the first logic control module 2031 informs the display driving module 2032 The first notification signal is sent to notify the display driving module 2032 that there is an object to be protected in the laser projection area.
  • the display driving module 2032 receives the first notification signal, it adjusts the projection parameters, and sends an adjustment signal carrying the adjusted projection parameters to the light source driving module 2041.
  • the light source driving module 2041 provides a driving signal to the light source module 2042 based on the adjustment signal.
  • the light source module 2042 emits light under the driving of the driving signal.
  • the first logic control module 2031 can count the number of pulses of the detection signal in a unit time period, and compare the number of pulses with a reference threshold. When the number is greater than Or when it is equal to the reference threshold, the first logic control module 2031 determines that there is an object to be protected in the laser projection area, and sends a first notification signal to the display drive module 2032, so that the display drive module 2032 adjusts the projection parameters, and sends it to the light source drive module 2041 Send the adjustment signal carrying the adjusted projection parameters; when the number is less than the reference threshold, the first logic control module 2031 determines that there is no object to be protected in the laser projection area, and does not send the first notification signal to the display driving module 2032.
  • the reference threshold may be determined based on the energy of infrared rays emitted by the object to be protected.
  • a communication connection may be established between the first logic control module 2031 and the display driving module 2032, and the first notification signal may be a signal conforming to a corresponding communication protocol.
  • an I 2 C (a serial communication bus) connection may be established between the first logic control module 2031 and the display driving module 2032, and the first notification signal may be an I 2 C signal.
  • the projection device 200 may also display a first prompt screen when it is determined that there is an object to be protected in the laser projection area to prompt the user to stay away from the laser projection area, thereby realizing interaction with the user and improving user experience.
  • the projection device 200 further includes: a first storage unit 205.
  • the implementation process of displaying the first prompt screen includes: when the laser light source control unit 203 determines that there is an object to be protected in the laser projection area, obtains the screen information of the first prompt screen from the first storage unit 205, and based on the first prompt screen To send the first control signal to the light source module 2042.
  • the light source module 2042 is configured to emit light for displaying the first prompt picture under the control of the first control signal.
  • the light source module 2042 may include devices such as a laser and a DMD.
  • the DMD includes multiple light valves.
  • the first control signal sent by the laser light source control unit 203 to the light source module 2042 can change the rotation angle of the light valve of the DMD so that the light emitted by the laser can form a first prompt image on the lens after passing through the DMD.
  • the control function of the first control signal can be expressed as: when the light irradiated on the light valve of the DMD is the light used to display the first prompt screen, the first control signal can control the light valve to which the light hits according to The positive deflection angle rotates so that the light can be reflected to the lens for imaging; when the light irradiated on the light valve of the DMD is not the light used to display the first prompt screen, the first control signal controls the light hit by the light The valve rotates according to a negative deflection angle, so that the light cannot be reflected to the lens for imaging.
  • the display driving module 2032 may obtain the screen information of the first prompt screen from the first storage unit 205 based on the first notification signal, and send the first prompt screen to the light source module 2042 based on the screen information of the first prompt screen. control signal.
  • the first prompt screen may be a static prompt screen.
  • the first prompt screen may include a static pattern of "a person is approaching", and the screen information of the first prompt screen may be pixel data of the first prompt screen.
  • the first storage unit 205 may be arranged outside the laser light source control unit 203 or inside the laser light source control unit 203.
  • the embodiment of the present application does not limit the position of the first storage unit 205.
  • the first storage unit 205 is provided inside the laser light source control unit 203 as an example for description.
  • the working principle of the projection device 200 includes:
  • the sensor module 2011 is used to collect the infrared signal emitted by the object to be protected, convert the collected infrared signal into a sensor signal, and send the sensor signal to the signal conversion module 2012.
  • the signal conversion module 2012 is configured to convert the sensor signal into a detection signal when receiving the sensor signal, and send the detection signal to the multimedia board unit 202.
  • the multimedia board unit 202 is used to receive the detection signal, determine whether there is an object to be protected in the laser projection area of the laser light source unit 204 based on the detection signal, and when it is determined that there is an object to be protected in the laser projection area, send the second signal to the laser light source control unit 203
  • An indication signal, the first indication signal is used to indicate that there is an object to be protected in the laser projection area.
  • the laser light source control unit 203 is configured to adjust projection parameters based on the first indication signal, and send an adjustment signal carrying the adjusted projection parameters to the light source driving module 2041.
  • the light source driving module 2041 is configured to provide a driving signal to the light source module 2042 based on the adjustment signal.
  • the light source module 2042 is used to emit light under the driving of a driving signal.
  • the multimedia board unit 202 is further configured to send a stop instruction signal to the laser light source control unit 203, where the stop instruction signal is used to instruct the laser light source control unit 203 to stop determining whether there is an object to be protected in the laser projection area based on the detection signal.
  • the multimedia board unit 202 includes a second logic control module 2021 and a multimedia main control module 2022.
  • the second logic control module 2021 is configured to receive the detection signal and determine whether there is an object to be protected in the laser projection area based on the detection signal. When it is determined that there is an object to be protected in the laser projection area, the second logic control module 2021 reports to the multimedia main control module 2022 sends a second notification signal, which is used to indicate that there is an object to be protected in the laser projection area.
  • the multimedia main control module 2022 receives the second notification signal, it sends the first indication signal to the first logic control module 2031.
  • the first logic control module 2031 sends the first indication signal to the display driving module 2032 based on the first indication signal.
  • the notification signal is used to notify the display driving module 2032 that there is an object to be protected in the laser projection area.
  • the display driving module 2032 receives the first notification signal, it adjusts the projection parameters, and sends an adjustment signal carrying the adjusted projection parameters to the light source driving module 2041.
  • the light source driving module 2041 provides a driving signal to the light source module 2042 based on the adjustment signal.
  • the light source module 2042 emits light under the driving of the driving signal.
  • the multimedia main control module 2022 may also send a stop instruction signal to the first logic control module 2031. After receiving the stop instruction signal, the first logic control module 2031 stops determining whether the laser projection area is in the laser projection area based on the detection signal. There are objects to be protected.
  • the process of detecting whether there is an object to be protected in the laser projection area by the second logic control module 2021 can refer to the aforementioned process of detecting whether there is an object to be protected in the laser projection area by the first logic control module 2031. Do repeat.
  • the level of the second notification signal may be an effective level, and the effective level may be a high level or a low level.
  • the second logic control module 2021 sends the second notification signal at a high level to the multimedia main control module 2022 when determining that there is an object to be protected in the laser projection area ;
  • the second logic control module 2021 determines that there is no object to be protected in the laser projection area, it sends a second notification signal at a low level to the multimedia main control module 2022.
  • a communication connection may be established between the multimedia main control module 2022 and the first logic control module 2031, and the first indication signal and the stop indication signal may be signals complying with the communication protocol.
  • the first indication signal and the stop indication signal may both be I 2 C signals.
  • the projection device 200 further includes: a second storage unit 206, which is configured to store the screen information of the second prompt screen.
  • the multimedia board unit 202 determines that there is an object to be protected in the laser projection area, it can obtain the screen information of the second prompt screen from the second storage unit 206, and send a display signal to the laser light source control unit 203, the display signal carrying the first 2.
  • the laser light source control unit 203 sends a second control signal to the light source module 2042 based on the display signal.
  • the light source module 2042 emits light for displaying the second prompt image under the control of the second control signal.
  • the multimedia main control module 2022 may obtain the screen information of the second prompt screen from the second storage unit 206 when receiving the second notification signal, and send a display signal to the display driving module 2032.
  • the display driving module 2032 sends a second control signal to the light source module 2042 based on the display signal.
  • the second control signal sent by the display driving module 2032 to the light source module 2042 can change the rotation angle of the light valve in the light source module 2042, so that the light emitted by the laser in the light source module 2042 can be imaged on the lens after passing through the DMD. Prompt screen.
  • the control effect of the second control signal on the light valve reference may be made to the control effect of the first control signal on the light valve, which is not described in detail in the embodiment of the present application.
  • the second prompt screen may be a dynamic prompt screen.
  • the second prompt screen may include a static pattern of "someone approaching" and a dynamic pattern of "countdown (n seconds)".
  • the screen information of the prompt screen may be pixel data of the second prompt screen.
  • n is a positive integer, and the value of n displayed at different times is different.
  • the second prompt screen is a dynamic prompt screen, which can improve the display effect of the prompt screen and further improve user experience.
  • the operator can set the countdown threshold in advance, and during the display of the second prompt screen, a screen in which the value of n gradually decreases from the countdown threshold to 0 can be displayed. And before the value of n is reduced from the countdown threshold to 0 (that is, before the end of the countdown), if the object to be protected continues to exist in the laser projection area, the light source driving module 2041 may continuously send a driving signal based on the adjusted projection parameters to The driving light source module 2042 continuously emits light whose parameters meet the projection parameters.
  • the light source driving module 2041 can issue a driving signal based on the projection parameters before the laser light source control unit 203 is adjusted to drive
  • the light source module 2042 emits light based on the unadjusted projection parameters. If there are still objects to be protected in the laser projection area, the laser light source control unit 203 may adjust the projection parameters to control the light source driving module 2041 to turn off the light source module 2042.
  • the second storage unit 206 may be arranged outside the multimedia board unit 202 or inside the multimedia board unit 202.
  • the embodiment of the present application does not limit the position of the second storage unit 206. 4 Take the second storage unit 206 disposed inside the multimedia board unit 202 as an example for description.
  • the multimedia main control module 2022 is also used to send a sensitivity control signal to the signal conversion module 2012.
  • the sensitivity control signal is used to control the sensitivity of the signal conversion module 2012.
  • the sensitivity represents the signal conversion module 2012 to the sensor module 2011. The sensitivity of the sensor signal.
  • the high-level sensitivity control signal is used to instruct to adjust the sensitivity of the signal conversion module 2012 to be high, that is, to make the signal conversion module 2012 affect the sensor module 2011
  • the sent sensor signal has a high degree of sensitivity; when the level of the sensitivity control signal is low, the low-level sensitivity control signal is used to instruct to adjust the sensitivity of the signal conversion module 2012 to low, that is, As a result, the signal conversion module 2012 has a lower degree of sensitivity to the sensor signal sent by the sensor module 2011.
  • the multimedia main control module 2022 can run: boot layer, driver layer, framework layer and application layer. During the startup process of the multimedia main control module 2022, start layer by layer from the boot layer to the application layer. When the application After the layer is started, the multimedia master control module 2022 is started.
  • the effective level signal may be a high level signal
  • the invalid level signal may be a low level signal, which is not limited in the embodiment of the present application.
  • FIG. 5 is a block diagram of another projection device provided by an embodiment of the application.
  • the projection device 200 includes a detection unit 201, a multimedia board unit 202, a laser light source control unit 203, and a laser light source unit 204.
  • the detection unit 201 Including a sensor module 2011 and a signal conversion module 2012
  • the laser light source unit 204 includes a light source driving module 2041 and a light source module 2042. Since the working process of the projection device 200 is different before and after the multimedia board unit 202 is started up, the working principle of the projection device before and after the multimedia board unit 202 is started up is described in the second embodiment. .
  • the working principle of the projection device 200 includes:
  • the sensor module 2011 is used to collect the infrared signal emitted by the object to be protected, convert the collected infrared signal into a sensor signal, and send the sensor signal to the signal conversion module 2012.
  • the signal conversion module 2012 is configured to convert the sensing signal into a detection signal when receiving the sensing signal, and send the detection signal to the laser light source control unit 203.
  • the laser light source control unit 203 is used to receive the detection signal, and determine whether there is an object to be protected in the laser projection area based on the detection signal. When it is determined that there is an object to be protected in the laser projection area, the laser light source control unit 203 adjusts the projection parameters and reports to the light source
  • the driving module 2041 sends an adjustment signal carrying the adjusted projection parameters.
  • the light source driving module 2041 is configured to provide a driving signal to the light source module 2042 based on the adjustment signal.
  • the light source module 2042 is used to emit light under the driving of a driving signal.
  • the working principles of the laser light source control unit 203, the light source driving module 2041, and the light source module 2042 can be referred to the working principles of the laser light source control unit 203, the light source driving module 2041, and the light source module 2042 in the first embodiment. The embodiments are not repeated here.
  • the projection device 200 further includes: a first storage unit 205.
  • the laser light source control unit 203 determines that there is an object to be protected in the laser projection area, it acquires the screen information of the first prompt screen from the first storage unit 205, and sends the first prompt screen to the light source module 2042 based on the screen information of the first prompt screen. control signal.
  • the light source module 2042 is configured to emit light for displaying the first prompt picture under the control of the first control signal.
  • the first storage unit 205 can be provided outside the laser light source control unit 203, or can be provided inside the laser light source control unit 203.
  • the embodiment of the present application does not limit the location of the first storage unit 205. 5 Take the first storage unit 205 disposed inside the laser light source control unit 203 as an example for description.
  • the working principle of the projection device 200 includes:
  • the sensor module 2011 is used to collect the infrared signal emitted by the object to be protected, convert the collected infrared signal into a sensor signal, and send the sensor signal to the signal conversion module 2012.
  • the signal conversion module 2012 is configured to convert the sensing signal into a detection signal when receiving the sensing signal, and send the detection signal to the laser light source control unit 203.
  • the laser light source control unit 203 is used to receive the detection signal, and determine whether there is an object to be protected in the laser projection area based on the detection signal. When it is determined that there is an object to be protected in the laser projection area, the laser light source control unit 203 adjusts the projection parameters and reports to the light source
  • the driving module 2041 sends an adjustment signal carrying the adjusted projection parameters.
  • the light source driving module 2041 is configured to provide a driving signal to the light source module 2042 based on the adjustment signal.
  • the light source module 2042 is used to emit light under the driving of a driving signal.
  • the working principles of the laser light source control unit 203, the light source driving module 2041, and the light source module 2042 can be referred to the working principles of the laser light source control unit 203, the light source driving module 2041, and the light source module 2042 in the first embodiment. The examples are not repeated here.
  • the multimedia board unit 202 includes a multimedia main control module 2022. After the multimedia main control module 2022 is started, it is also used to send a second instruction signal to the first logic control module 2031 of the laser light source control unit 203. The second instruction signal is used for The multimedia board unit 202 is instructed to start up.
  • the projection device further includes: a second storage unit 206, and the second storage unit 206 is configured to store the screen information of the second prompt screen.
  • the first logic control module 2031 determines that there is an object to be protected in the laser projection area, it sends a third instruction signal to the multimedia main control module 2022 based on the second instruction signal.
  • the third instruction signal is used to indicate that there is an object to be protected in the laser projection area. object.
  • the multimedia main control module 2022 obtains the screen information of the second prompt screen from the second storage unit 206, and sends a display signal to the display driving module 2032 of the laser light source control unit 203.
  • the display signal carries the second Prompt the screen information of the screen.
  • the display driving module 2032 sends a second control signal to the light source module 2042 based on the display signal.
  • the light source module 2042 emits light for displaying the second prompt image under the control of the second control signal.
  • the control effect of the second control signal on the light valve can refer to the control effect of the first control signal on the light valve in the first embodiment
  • the display process of the second prompt screen can refer to the display of the second prompt screen in the first embodiment. The process is not described in detail in the embodiment of this application.
  • the multimedia main control module 2022 may establish a communication connection with the first logic control module 2031 and the display driving module 2032, and the second indication signal, the third indication signal and the display signal may all be signals complying with the communication protocol. For example, assuming that the multimedia main control module 2022 has established an I 2 C connection with the first logic control module 2031 and the display driving module 2032, the second indicator signal, the third indicator signal, and the display signal may all be I 2 C signals.
  • the second storage unit 206 can be arranged outside the multimedia board unit 202 or inside the multimedia board unit 202.
  • the embodiment of the present application does not limit the position of the second storage unit 206, as shown in FIG. 5
  • the second storage unit 206 is provided inside the multimedia board unit 202 as an example for description.
  • the size of the sensing signal sent by the sensor module 2011 is usually several millivolts (mv)
  • the sensing signal if it is directly sent to the laser light source control unit 203 or the multimedia board unit 202, it will cause the laser The light source control unit 203 or the multimedia board unit 202 cannot recognize the sensor signal, and thus cannot process the sensor signal. Therefore, before sending the sensor signal to the laser light source control unit 203 or the multimedia board unit 202, it is necessary to check The sensing signal undergoes a series of processing operations such as amplification, so that the laser light source control unit 203 or the multimedia board unit 202 can recognize and process the sensing signal.
  • mv millivolts
  • the signal conversion module 2012 may send a status indication signal to the laser light source control unit 203 or the multimedia board unit 202 to indicate that the signal conversion module 2012 has not received
  • the level of the status indication signal may continue to be a high level.
  • the signal conversion module 2012 may first amplify the received sensing signal, and perform comparison processing and logic processing on the amplified sensing signal to obtain the detection signal.
  • FIGS. 6 and 7 are both schematic structural diagrams of a projection device provided by an embodiment of the present application.
  • the projection device 200 shown in FIG. 6 corresponds to the projection device 200 described in Embodiment 1.
  • the projection device shown in FIG. 7 It corresponds to the projection device 200 described in the second embodiment.
  • the signal conversion module 2012 may include: an amplification sub-module 20121, a comparison sub-module 20122, and a logic sub-module 20123.
  • the amplifying sub-module 20121 is used to amplify the sensing signal.
  • the amplifying sub-module 20121 can amplify the sensing signal through an operational amplifier circuit.
  • the sensing signal sent by the sensor module 2011 is a signal A
  • the amplifying sub-module 20121 amplifies the amplitude of the signal A to obtain the signal B.
  • the maximum value of signal A is 2mv
  • the amplifying sub-module 20121 amplifies the signal A to obtain signal B.
  • the maximum value of signal B is 2.5v; for another example, the minimum value of signal A is 0.5mv, and the amplifier
  • the module 20121 amplifies the signal A to obtain the signal B, and the minimum value of the signal B is 0.5v.
  • the comparison sub-module 20122 stores the high voltage threshold and the low voltage threshold.
  • the comparison sub-module 20122 can compare the absolute value of the amplified sensing signal at different moments with the high voltage threshold and the low voltage threshold to obtain two A pulse signal.
  • the comparison sub-module 20122 can convert the amplified sensing signal through two comparison circuits to obtain two pulse signals.
  • the comparison submodule 20122 stores a high voltage threshold a1 and a low voltage threshold a2.
  • the absolute value of the amplitude of the signal B at different moments is compared with the high voltage threshold a1 to obtain a pulse signal C.
  • the pulse signal C when the absolute value of the amplitude of the signal B at a certain moment is greater than the high voltage threshold a1, the pulse signal C has a high level at that moment, and when the absolute value of the amplitude of the signal B at a certain moment is less than the high voltage threshold a1 When the pulse signal C is at a low level at that moment.
  • the absolute value of the amplitude of the signal B at different moments is compared with the low voltage threshold a2 to obtain the pulse signal D.
  • the pulse signal D when the absolute value of the amplitude of the signal B at a certain time is greater than the low voltage threshold a2, the pulse signal D has a high level at that time, and when the absolute value of the amplitude of the signal B at a certain time is less than a2, The pulse signal D has a low level at this moment.
  • the logic sub-module 20123 can perform a logical OR operation on the two pulse signals output by the comparison sub-module 20122 to obtain a detection signal.
  • the detection signal may be a pulse signal
  • the logic sub-module 20123 may perform a logical OR operation on the two pulse signals output by the comparison sub-module 20122 through a logical OR gate to obtain a pulse signal.
  • the logic sub-module 20123 can perform a logical OR operation on the pulse signal C and the pulse signal D to obtain the pulse signal E.
  • the laser light source control unit determines that there is an object to be protected in the laser projection area of the laser light source unit within the period after receiving the power-on instruction and before the multimedia board unit is started.
  • the laser light source unit emits light based on the adjusted projection parameters.
  • the multimedia board unit instructs the laser light source control unit to adjust the projection parameters, but the multimedia board unit is in the laser The start-up of the light source unit is completed afterwards. Therefore, compared with the related technology, the laser light source control unit can instruct the laser light source unit to emit light based on the adjusted projection parameters in the projection device provided by the embodiment of the present application before the multimedia board unit is started.
  • the projection device After receiving the power-on instruction, the projection device can realize the human eye protection function, thereby improving the safety of the projection device.
  • FIG. 8 is a flowchart of a projection method provided by an embodiment of this application.
  • the method can be applied to the projection apparatus provided by the embodiment of this application, for example, it can be applied to the projection shown in FIGS. 2 to 7 ⁇ 200 ⁇ Device 200. Then the method includes:
  • Step 301 When receiving a detection signal for detecting whether there is an object to be protected in the laser projection area, the detection unit sends a detection signal to the laser light source control unit.
  • Step 302 The laser light source control unit receives the detection signal after receiving the power-on instruction and before the multimedia board unit is started, and when it is determined based on the detection signal that there is an object to be protected in the laser projection area of the laser light source unit, the laser The light source unit sends an adjustment signal.
  • the adjustment signal carries the adjusted projection parameter, and the projection parameter is used to instruct to adjust the luminous brightness of at least one laser light source in the laser light source unit.
  • Step 303 The laser light source unit emits light under the control of the adjustment signal.
  • the laser light source control unit determines that there is an object to be protected in the laser projection area of the laser light source unit within the period after receiving the power-on instruction and before the multimedia board unit is started.
  • the laser light source unit emits light based on the adjusted projection parameters.
  • the multimedia board unit instructs the laser light source control unit to adjust the projection parameters, but the multimedia board unit is in the laser The start-up of the light source unit is completed afterwards. Therefore, compared with the related technology, the laser light source control unit can instruct the laser light source unit to emit light based on the adjusted projection parameters in the projection device provided by the embodiment of the present application before the multimedia board unit is started.
  • the projection device After receiving the power-on instruction, the projection device can realize the human eye protection function, thereby improving the safety of the projection device.
  • FIG. 9 is a flowchart of another projection method provided by an embodiment of this application.
  • the projection method can be applied to the projection apparatus shown in the first embodiment.
  • the method can be applied to FIGS. 3.
  • the projection device 200 shown in FIG. 4 or FIG. 6, the method may include:
  • Step 401 The sensor module receives the infrared signal, and sends the sensor signal to the signal conversion module based on the infrared signal.
  • the sensor module can convert the infrared signal into a sensing signal, and send the sensing signal to the signal conversion module.
  • Step 402 The signal conversion module sends a detection signal to the laser light source control unit and the multimedia board unit based on the sensor signal.
  • the detection signal is obtained by converting the sensing signal by the signal conversion module.
  • the signal conversion module may sequentially perform amplification processing, comparison processing, and logic processing on the received sensing signal to obtain the detection signal.
  • Step 403 After receiving the start-up instruction and before the multimedia board unit is started, the laser light source control unit receives the detection signal, and adjusts the projection when it is determined based on the detection signal that there is an object to be protected in the laser projection area of the laser light source unit Parameters, send an adjustment signal carrying the adjusted projection parameters to the light source drive module, and at the same time, obtain the screen information of the first prompt screen from the first storage unit, and send the first prompt screen to the light source module based on the screen information of the first prompt screen One control signal.
  • the projection parameter is used to instruct to adjust the luminous brightness of at least one laser light source in the light source module.
  • Step 404 The light source driving module provides a driving signal to the light source module based on the adjustment signal.
  • Step 405 The light source module emits light for displaying the first prompt picture under the action of the driving signal and the first control signal.
  • Step 406 After the multimedia board unit is started, it sends a stop instruction signal to the laser light source control unit.
  • the stop instruction signal is used to instruct the laser light source control unit to stop detecting whether there is an object to be protected in the laser projection area.
  • Step 407 After receiving the stop instruction signal, the laser light source control unit stops detecting whether there is an object to be protected in the laser projection area.
  • Step 408 After the multimedia board unit is started, it receives the detection signal, and when it is determined based on the detection signal that there is an object to be protected in the laser projection area, it sends a first indication signal to the laser light source control unit, and obtains the first indication signal from the second storage unit. Second, the screen information of the prompt screen is sent, and a display signal is sent to the laser light source control unit based on the information of the second prompt screen.
  • the first indication signal is used to indicate that there is an object to be protected in the laser projection area, and the display signal carries picture information of the second prompt picture.
  • Step 409 The laser light source control unit adjusts the projection parameters based on the first indication signal, sends an adjustment signal carrying the adjusted projection parameters to the light source driving module, and sends a second control signal to the light source module based on the display signal.
  • Step 410 The light source driving module provides a driving signal to the light source module based on the adjustment signal.
  • Step 411 The light source module emits light for displaying the second prompt image under the action of the driving signal and the second control signal.
  • FIG. 10 is a flowchart of another projection method provided by an embodiment of this application.
  • the projection method can be applied to the projection device shown in the second embodiment.
  • the method can be applied to FIG. 2 and FIG. 3.
  • the projection device 200 shown in FIG. 5 or FIG. 7, the method may include:
  • Step 501 The sensor module receives the infrared signal, and sends the sensor signal to the signal conversion module based on the received infrared signal.
  • Step 502 The signal conversion module sends a detection signal to the laser light source control unit based on the sensing signal.
  • Step 503 After receiving the power-on instruction and before the multimedia board unit is started, the laser light source control unit receives the detection signal, and adjusts the projection when it is determined based on the detection signal that there is an object to be protected in the laser projection area of the laser light source unit Parameters, send an adjustment signal carrying the adjusted projection parameters to the light source drive module, and at the same time, obtain the screen information of the first prompt screen from the first storage unit, and send the first prompt screen to the light source module based on the screen information of the first prompt screen One control signal.
  • Step 504 The light source driving module provides a driving signal to the light source module based on the adjustment signal.
  • Step 505 The light source module emits light for displaying the first prompt picture under the action of the driving signal and the first control signal.
  • Step 506 After the startup of the multimedia board unit is completed, it sends a second instruction signal to the laser light source control unit.
  • the second indication signal is used to indicate the completion of the startup of the multimedia board unit.
  • Step 507 When determining that there is an object to be protected in the laser projection area, the laser light source control unit adjusts the projection parameters, sends an adjustment signal carrying the adjusted projection parameters to the light source drive module, and sends to the multimedia board unit based on the second instruction signal The third indication signal.
  • the third indication signal is used to indicate that there is an object to be protected in the laser projection area.
  • Step 508 The light source driving module provides a driving signal to the light source module based on the adjustment signal.
  • Step 509 The multimedia board unit obtains the screen information of the second prompt screen from the second storage unit based on the third instruction signal.
  • Step 510 The multimedia board unit sends a display signal to the laser light source control unit based on the screen information of the second prompt screen.
  • the display signal carries the picture information of the second prompt picture.
  • Step 511 The laser light source control unit sends a second control signal to the light source module based on the display signal.
  • Step 512 Under the action of the driving signal and the second control signal, the light source module emits light for displaying the second prompt screen.
  • the laser light source control unit determines that there is an object to be protected in the laser projection area of the laser light source unit within the period after receiving the power-on instruction and before the multimedia board unit is started.
  • the laser light source unit emits light based on the adjusted projection parameters.
  • the multimedia board unit instructs the laser light source control unit to adjust the projection parameters, but the multimedia board unit is in the laser The start-up of the light source unit is completed afterwards. Therefore, compared with the related technology, the laser light source control unit can instruct the laser light source unit to emit light based on the adjusted projection parameters in the projection device provided by the embodiment of the present application before the multimedia board unit is started.
  • the projection device After receiving the power-on instruction, the projection device can realize the human eye protection function, thereby improving the safety of the projection device.

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Abstract

本申请公开了一种投影方法及装置，属于激光投影技术领域。投影装置包括：检测单元、多媒体板单元、激光光源控制单元和激光光源单元；检测单元用于在接收到用于检测激光投影区域内是否存在待保护物体的检测信号时，向激光光源控制单元发送检测信号；激光光源控制单元用于在接收到开机指令后且多媒体板单元启动完成之前的时段内，在基于接收到的检测信号确定激光光源单元的激光投影区域内存在待保护物体时，向激光光源单元发送携带有调节后的投影参数的调节信号，投影参数用于指示调整激光光源单元中至少一个激光光源的发光亮度；激光光源单元用于在调节信号的控制下发出光线。

Description

投影方法及装置 技术领域
本申请涉及激光投影技术领域，特别涉及一种投影方法及装置。
背景技术
随着激光技术的发展，激光投影设备的应用越来越广泛。激光投影设备包括激光投影仪和显示屏，激光投影仪包括：激光光源控制单元、多媒体板单元和激光光源。激光投影仪可根据待显示的画面，向显示屏投射激光，以在显示屏上显示画面。
发明内容
第一方面，本申请实施例提供了一种投影装置，包括：检测单元、多媒体板单元、激光光源控制单元和激光光源单元；
所述检测单元，用于在接收到用于检测激光投影区域内是否存在待保护物体的检测信号时，向所述激光光源控制单元发送所述检测信号；
所述激光光源控制单元，用于在接收到开机指令后且所述多媒体板单元启动完成之前的时段内，接收所述检测信号，并在基于所述检测信号确定所述激光光源单元的激光投影区域内存在待保护物体时，向所述激光光源单元发送调节信号，所述调节信号携带有调节后的投影参数，所述投影参数用于指示调整所述激光光源单元中至少一个激光光源的发光亮度；
所述激光光源单元，用于在所述调节信号的控制下发出光线。
第二方面，提供了一种投影方法，所述方法包括：
检测单元在接收到用于检测激光投影区域内是否存在待保护物体的检测信号时，向激光光源控制单元发送所述检测信号；
所述激光光源控制单元在接收到开机指令后且多媒体板单元启动完成之前的时段内，接收所述检测信号，并在基于所述检测信号确定激光光源单元的激 光投影区域内存在待保护物体时，向所述激光光源单元发送调节信号，所述调节信号携带有调节后的投影参数，所述投影参数用于指示调整所述激光光源单元中至少一个激光光源的发光亮度；
所述激光光源单元在所述调节信号的控制下发出光线。
附图说明
为了更清楚地说明本申请的实施例，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是相关技术中投影装置的框图；
图2是本申请实施例提供的一种投影装置的框图；
图3是本申请实施例提供的另一种投影装置的框图；
图4是本申请实施例提供的再一种投影装置的框图；
图5是本申请实施例提供的又一种投影装置的框图；
图6是本申请实施例提供的一种投影装置的结构示意图；
图7是本申请实施例提供的另一种投影装置的结构示意图；
图8是本申请实施例提供的一种投影方法的流程图；
图9是本申请实施例提供的另一种投影方法的流程图；
图10是本申请实施例提供的再一种投影方法的流程图。
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本申请的实施例，并与说明书一起用于解释本申请的原理。
具体实施方式
为了使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请作进一步地详细描述，显然，所描述的实施例仅仅是本申请一部份实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例，都属于本申请保护的范围。
图1为相关技术中投影装置的框图，如图1所示，该投影装置100包括：传感器单元101、信号转换单元102、多媒体板单元103、激光光源控制单元104、 光源驱动单元105和激光光源单元106。多媒体板单元103包括：第一逻辑控制模块1031和多媒体主控模块1032。激光光源控制单元104包括第二逻辑控制模块1041和显示驱动模块1042。
激光是一种高能光源，当激光照射到人眼时，会对人眼造成较大伤害，因此，需要在激光投影设备中配置人眼保护功能，以减小激光投影设备对人眼的伤害。
投影装置100在实现人眼保护功能时，传感器单元101用于检测激光光源单元106的激光投影区域内是否存在热红外信号，将检测到的热红外信号转换为检测电信号，并向信号转换单元102发送该检测电信号。信号转换单元102用于将该检测电信号转换为脉冲信号，并将该脉冲信号发送至第一逻辑控制模块1031。
第一逻辑控制模块1031用于基于该脉冲信号判断激光投影区域内是否有人，并在激光投影区域内有人时，向多媒体主控模块1032发送有效电平信号，以通知多媒体主控模块1032激光投影区域内有人。多媒体主控模块1032用于在接收到该有效电平信号时，向第二逻辑控制模块1041发送第一通知信号，以通知第二逻辑控制模块1041激光投影区域内有人。第二逻辑控制模块1041用于在接收到第一通知信号后，向显示驱动模块1042发送第二通知信号，以通知显示驱动模块1042激光投影区域内有人。显示驱动模块1042在接收到该第二通知信号后，用于调节投影参数，并向光源驱动单元105发送携带有调节后的投影参数的调节信号，光源驱动单元105用于基于该调节信号向激光光源单元106提供驱动信号，以调节激光光源单元106中至少一个激光光源发出的光线的亮度，甚至，控制激光光源单元106停止发光。同时，第二逻辑控制模块1041还用于向光源驱动单元105发送处于有效电平的使能信号，以控制将该调节信号输入至光源驱动单元105。
需要说明的是，多媒体主控模块1032在启动完成后，才能读取第一逻辑控制模块1031发送的信号。但是，由于该多媒体主控模块1032的启动时间通常大于激光光源单元106的启动时间，即多媒体主控模块1032通常在激光光源单元106之后启动完成。则在该激光光源单元106启动完成，且多媒体主控模块1032启动完成前的时段内，由于多媒体主控模块1032无法读取到第一逻辑控制模块1031发送的有效电平信号，因此，即使激光投影区域内有人，多媒体主控 模块1032也无法向第二逻辑控制模块1041发送第一通知信号，导致第二逻辑控制模块1041无法向显示驱动模块1042发送第二通知信号，进一步导致显示驱动模块1042无法向光源驱动单元105发送携带有调节后的投影参数的调节信号，即导致无法实现人眼保护功能，所以，相关技术中的投影装置100的安全性较低。图2为本申请实施例提供的一种投影装置的框图，如图2所示，该投影装置200包括：检测单元201、多媒体板单元202、激光光源控制单元203和激光光源单元204。
检测单元201用于在接收到用于检测激光投影区域内是否存在待保护物体的检测信号时，向激光光源控制单元203发送检测信号。
激光光源控制单元203用于在接收到开机指令后且多媒体板单元202启动完成之前的时段内，接收检测信号，并在基于该检测信号确定激光光源单元204的激光投影区域内存在待保护物体时，向激光光源单元204发送调节信号，该调节信号携带有调节后的投影参数，该投影参数用于指示调整该激光光源单元204中至少一个激光光源的发光亮度。该待保护物体可以为活体。例如，该待保护物体可以为人。
激光光源单元204用于在调节信号的控制下发出光线。
综上所述，本申请实施例提供的投影装置，激光光源控制单元在接收到开开机指令后且多媒体板单元启动完成之前的时段内，在确定激光光源单元的激光投影区域内存在待保护物体时，将调节后的投影参数发送至激光光源单元，激光光源单元基于调节后的投影参数发出光线，而相关技术中，由多媒体板单元指示激光光源控制单元调节投影参数，但多媒体板单元在激光光源单元之后启动完成，因此，本申请实施例提供的投影装置相较于相关技术，在多媒体板单元启动完成之前，激光光源控制单元能够指示激光光源单元基于调节后的投影参数发出光线，使得在接收到开机指令后，投影装置即能够实现人眼保护功能，从而提高了投影装置的安全性。
图3为本申请实施例提供的另一种投影装置200的框图，如图3所示，检测单元201包括传感器模块2011和信号转换模块2012，传感器模块2011用于采集待保护物体发出的红外信号，将采集到的红外信号转换为传感信号，并将传感信号发送至信号转换模块2012，该传感信号的信号类型为电信号。信号转换模块2012用于在接收到该传感信号时，将传感信号转换为检测信号，并向激 光光源控制单元203发送检测信号。激光光源单元204包括光源驱动模块2041和光源模块2042，光源驱动模块2041用于接收激光光源控制单元203发送的调节信号，并基于该调节信号向光源模块2042提供驱动信号。光源模块2042用于在该驱动信号的驱动下发出光线。
其中，光源模块2042可以包括激光器和数字微镜器件(Digital Micromirror Device，DMD)等器件。该DMD可以包括阵列排布的多个光阀(也称微镜片)，该多个光阀可以与待显示图像中的多个像素点对应。通常的，多个光阀和多个像素点一一对应。
其中，调节信号可以为脉冲宽度调制(Pulse Width Modulation，PWM)信号。该PWM信号中携带调节后的投影参数的实现方式可以为：针对投影参数的不同取值，设置相对应的PWM信号的占空比，即通过该占空比体现投影参数的取值。
在一些实施方式中，激光光源控制单元203可以分别向光源驱动模块2041发送红色光线对应的PWM信号，绿色光线对应的PWM信号，蓝色光线对应的PWM信号以及黄色光线对应的PWM信号，各个颜色的光线对应的PWM信号中携带有相应颜色的光线对应的调节后的投影参数。光源驱动模块2041可以根据接收到的各个颜色光线对应的PWM信号中携带的调节后的投影参数确定各个颜色对应的调节后的投影参数，并基于该调节后的投影参数向光源模块2042提供驱动信号，以控制光源模块2042发出符合上述投影参数的光线，从而改变光源模块2042的发光效果。其中改变光源模块2042的发光效果包括：降低光源模块2042的亮度或者关闭光源模块2042。
需要说明的是，激光光源控制单元203在向光源驱动模块2041发送调节信号的同时，还可以向光源驱动模块2041发送处于有效电平的使能信号(Enable信号)，以控制上述PWM信号输入至光源驱动模块2041。
在本申请实施例中，投影装置200实现投影显示的实现方式有多种，本申请实施例以以下两个实施例，且检测单元201包括传感器模块2011和信号转换模块2012，激光光源单元204包括光源驱动模块2041和光源模块2042为例，对该投影装置200实现投影显示的实现方式进行说明。
实施例一
图4为本申请实施例提供的再一种投影装置的框图，如图4所示，该投影装置200包括检测单元201、多媒体板单元202、激光光源控制单元203和激光光源单元204，检测单元201包括传感器模块2011和信号转换模块2012，激光光源单元204包括光源驱动模块2041和光源模块2042。
由于在多媒体板单元202启动完成之前和启动完成之后该投影装置200的工作过程不同，因此，该实施例一中分别对多媒体板单元202启动完成之前和启动完成之后，投影装置的工作原理进行说明。
在投影装置200接收到开机指令后，且多媒体板单元202启动完成之前的时段内，投影装置200的工作原理包括：
传感器模块2011用于采集待保护物体发出的红外信号，将采集到的红外信号转换为传感信号，并将传感信号发送至信号转换模块2012，该传感信号的信号类型为电信号。信号转换模块2012用于在接收到该传感信号时，将传感信号转换为检测信号，并向激光光源控制单元203发送检测信号。激光光源控制单元203用于接收该检测信号，基于检测信号判断激光光源单元204的激光投影区域内是否存在待保护物体，在确定激光投影区域内存在待保护物体时，激光光源控制单元203调节投影参数，并向光源驱动模块2041发送调节信号，该调节信号携带有调节后的投影参数，该投影参数用于指示调整激光光源单元204中至少一个激光光源的发光亮度。光源驱动模块2041用于基于调节信号向光源模块2042提供驱动信号。光源模块2042用于在驱动信号的驱动下发出光线。
在一些实施方式中，如图4所示，激光光源控制单元203包括：第一逻辑控制模块2031和显示驱动模块2032。第一逻辑控制模块2031用于接收检测信号，并基于检测信号判断激光投影区域内是否存在待保护物体，在确定激光投影区域内存在待保护物体时，第一逻辑控制模块2031向显示驱动模块2032发送第一通知信号，以通知显示驱动模块2032激光投影区域内存在待保护物体。显示驱动模块2032在接收到第一通知信号时，调节投影参数，并向光源驱动模块2041发送携带有调节后的投影参数的调节信号。光源驱动模块2041基于调节信号向光源模块2042提供驱动信号。光源模块2042在驱动信号的驱动下发出光线。
在一些实施方式中，第一逻辑控制模块2031在接收到检测信号后，可以统计检测信号在单位时间周期内脉冲的个数，并将该脉冲个数与参考阈值进行比 较，当该个数大于或者等于参考阈值时，第一逻辑控制模块2031确定激光投影区域内存在待保护物体，并向显示驱动模块2032发送第一通知信号，以使显示驱动模块2032调节投影参数，并向光源驱动模块2041发送携带有调节后的投影参数的调节信号；当该个数小于参考阈值时，第一逻辑控制模块2031确定激光投影区域内不存在待保护物体，不向显示驱动模块2032发送第一通知信号。该参考阈值可以基于待保护物体发出的红外线的能量确定。
其中，第一逻辑控制模块2031与显示驱动模块2032之间可以建立有通信连接，第一通知信号可以为符合相应通信协议的信号。例如，第一逻辑控制模块2031与显示驱动模块2032之间可以建立有I 2C(一种串行通讯总线)连接，则第一通知信号可以为I 2C信号。
在一些实施方式中，该投影装置200还可以在确定激光投影区域内存在待保护物体时，显示第一提示画面，以提示用户远离激光投影区域，从而实现与用户的交互，提高用户体验。此时，如图4所示，该投影装置200还包括：第一存储单元205。显示该第一提示画面的实现过程包括：激光光源控制单元203在确定激光投影区域内存在待保护物体时，从第一存储单元205中获取第一提示画面的画面信息，并基于第一提示画面的画面信息，向光源模块2042发送第一控制信号。光源模块2042用于在第一控制信号的控制作用下，发出用于显示第一提示画面的光线。
在一些实施方式中光源模块2042可以包括激光器和DMD等器件该DMD包括多个光阀。激光光源控制单元203向光源模块2042发送的第一控制信号，能够改变DMD的光阀的旋转角度，使得激光器发出的光线经过DMD后，能够在镜头上成像第一提示画面。其中，第一控制信号的控制作用可以表现为：当照射至DMD的光阀上的光线是用于显示第一提示画面的光线时，第一控制信号可以控制该光线所射到的光阀按照正偏转角度进行旋转，以使该光线能够反射至镜头成像；当照射至DMD的光阀上的光线不是用于显示第一提示画面的光线时，第一控制信号控制该光线所射到的光阀按照负偏转角度进行旋转，以使该光线不能反射至镜头成像。
在一些实施方式中，显示驱动模块2032可以基于第一通知信号，从第一存储单元205中获取第一提示画面的画面信息，并基于第一提示画面的画面信息，向光源模块2042发送第一控制信号。其中，第一提示画面可以为静态的提示画 面，例如，该第一提示画面可以包括″有人靠近″的静态图案，该第一提示画面的画面信息可以为第一提示画面的像素数据。
在一些实施方式中，第一存储单元205可以设置在激光光源控制单元203的外部，也可以设置在激光光源控制单元203的内部，本申请实施例对第一存储单元205的位置不做限定，图4以该第一存储单元205设置在激光光源控制单元203的内部为例进行说明。
在多媒体板单元202启动完成之后，投影装置200的工作原理包括：
传感器模块2011用于采集待保护物体发出的红外信号，将采集到的红外信号转换为传感信号，并将传感信号发送至信号转换模块2012。信号转换模块2012用于在接收到该传感信号时，将传感信号转换为检测信号，并向多媒体板单元202发送检测信号。多媒体板单元202用于接收该检测信号，基于检测信号判断激光光源单元204的激光投影区域内是否存在待保护物体，在确定激光投影区域内存在待保护物体时，向激光光源控制单元203发送第一指示信号，该第一指示信号用于指示激光投影区域内存在待保护物体。激光光源控制单元203用于基于第一指示信号调节投影参数，并向光源驱动模块2041发送携带有调节后的投影参数的调节信号。光源驱动模块2041用于基于调节信号向光源模块2042提供驱动信号。光源模块2042用于在驱动信号的驱动下发出光线。可选地，多媒体板单元202还用于向激光光源控制单元203发送停止指示信号，该停止指示信号用于指示激光光源控制单元203停止基于检测信号判断激光投影区域内是否存在待保护物体。
在一些实施方式中，如图4所示，多媒体板单元202包括第二逻辑控制模块2021和多媒体主控模块2022。第二逻辑控制模块2021用于接收检测信号，并基于检测信号判断激光投影区域内是否存在待保护物体，在确定激光投影区域内存在待保护物体时，第二逻辑控制模块2021向多媒体主控模块2022发送第二通知信号，该第二通知信号用于指示激光投影区域内存在待保护物体。多媒体主控模块2022在接收到第二通知信号时，向第一逻辑控制模块2031发送第一指示信号，相应的，第一逻辑控制模块2031基于该第一指示信号向显示驱动模块2032发送第一通知信号，以通知显示驱动模块2032激光投影区域内存在待保护物体。显示驱动模块2032在接收到第一通知信号时，调节投影参数，并向光源驱动模块2041发送携带有调节后的投影参数的调节信号。光源驱动模 块2041基于调节信号向光源模块2042提供驱动信号。光源模块2042在驱动信号的驱动下发出光线。
在一些实施方式中，多媒体主控模块2022还可以向第一逻辑控制模块2031发送停止指示信号，第一逻辑控制模块2031在接收到该停止指示信号后，停止基于检测信号判断激光投影区域内是否存在待保护物体。
其中，该第二逻辑控制模块2021检测激光投影区域内是否存在待保护物体的过程可以参考前述第一逻辑控制模块2031检测激光投影区域内是否存在待保护物体的过程，本申请实施例在此不做赘述。第二通知信号的电平可以为有效电平，该有效电平可以为高电平或者低电平。示例地，假设第二通知信号的电平为高电平，第二逻辑控制模块2021在确定激光投影区域内存在待保护物体时，向多媒体主控模块2022发送处于高电平的第二通知信号；第二逻辑控制模块2021在确定激光投影区域内未存在待保护物体时，向多媒体主控模块2022发送处于低电平的第二通知信号。
其中，多媒体主控模块2022与第一逻辑控制模块2031之间可以建立有通信连接，第一指示信号和停止指示信号可以为符合该通信协议的信号。示例地，假设多媒体主控模块2022与第一逻辑控制模块2031建立有I 2C连接，则第一指示信号和停止指示信号均可以为I 2C信号。
在一些实施中，如图4所示，该投影装置200还包括：第二存储单元206，第二存储单元206用于存储第二提示画面的画面信息。多媒体板单元202在确定激光投影区域内存在待保护物体时，可以从第二存储单元206中获取第二提示画面的画面信息，并向激光光源控制单元203发送显示信号，该显示信号携带有第二提示画面的画面信息。激光光源控制单元203基于显示信号，向光源模块2042发送第二控制信号。光源模块2042在第二控制信号的控制作用下，发出用于显示第二提示画面的光线。
在一种可能的实施方式中，多媒体主控模块2022可以在接收到第二通知信号时，从第二存储单元206中获取第二提示画面的画面信息，并向显示驱动模块2032发送显示信号。显示驱动模块2032基于该显示信号向光源模块2042发送第二控制信号。示例地，显示驱动模块2032向光源模块2042发送的第二控制信号能够改变光源模块2042中光阀的旋转角度，以使光源模块2042中激光器发出的光线经过DMD后，能够在镜头上成像第二提示画面。该第二控制信号 对光阀的控制作用可以参考前述第一控制信号对光阀的控制作用，本申请实施例在此不做赘述。
在一种可能的实施方式中，第二提示画面可以为动态的提示画面，例如该第二提示画面可以包括″有人靠近″的静态图案以及″倒计时(n秒)″的动态图案，该第二提示画面的画面信息可以为第二提示画面的像素数据。其中，n为正整数，且在不同时刻显示的n的数值不同。该第二提示画面为动态提示画面，能够提高提示画面的显示效果，进一步提高用户体验。
需要说明的是，操作人员可以预先设置倒计时阈值，在第二提示画面的显示过程中，可以显示n的数值从该倒计时阈值逐渐减为0的画面。且在n的数值由倒计时阈值减为0之前(也即是在倒计时结束之前)，若激光投影区域内持续存在待保护物体，光源驱动模块2041可以基于调整后的投影参数持续发出驱动信号，以驱动光源模块2042持续发出参数符合投影参数的光线。在n减为0时(也即是倒计时结束时)，若激光投影区域内不存在待保护物体，则光源驱动模块2041可以基于激光光源控制单元203未调节前的投影参数发出驱动信号，以驱动光源模块2042基于该未调节前的投影参数发出光线，若激光投影区域内仍然存在待保护物体，则激光光源控制单元203可以通过调节投影参数，以控制光源驱动模块2041关闭光源模块2042。
在一些实施方式中，该第二存储单元206可以设置在多媒体板单元202的外部，也可以设置在多媒体板单元202的内部，本申请实施例对第二存储单元206的位置不做限定，图4以该第二存储单元206设置在多媒体板单元202的内部为例进行说明。
在一些实施方式中，该多媒体主控模块2022还用于向信号转换模块2012发送灵敏度控制信号该灵敏度控制信号用于控制信号转换模块2012的灵敏度，灵敏度表示信号转换模块2012对传感器模块2011发出的传感信号的敏感程度。示例地，当灵敏度控制信号的电平为高电平时，该高电平的灵敏度控制信号用于指示将信号转换模块2012的灵敏度调节为高，也即是，使得信号转换模块2012对传感器模块2011发出的传感信号具有较高的敏感程度；当灵敏度控制信号的电平为低电平时，该低电平的灵敏度控制信号用于指示将信号转换模块2012的灵敏度调节为低，也即是，使得信号转换模块2012对传感器模块2011发出的传感信号具有较低的敏感程度。
需要说明的是，多媒体主控模块2022中可以运行有：引导层、驱动层、框架层和应用层，在多媒体主控模块2022的启动过程中，从引导层至应用层逐层启动，当应用层启动完成后，多媒体主控模块2022启动完成。
在本申请实施例中，有效电平信号可以为高电平信号，无效电平信号可以为低电平信号，本申请实施例对此不做限定。
实施例二
图5为本申请实施例提供的再一种投影装置的框图，如图5所示，投影装置200包括检测单元201、多媒体板单元202、激光光源控制单元203和激光光源单元204，检测单元201包括传感器模块2011和信号转换模块2012，激光光源单元204包括光源驱动模块2041和光源模块2042。由于在多媒体板单元202启动完成之前和启动完成之后该投影装置200的工作过程不同，因此，该实施例二中分别对多媒体板单元202启动完成之前和启动完成之后，投影装置的工作原理进行说明。
在投影装置200接收到开机指令后，且多媒体板单元202启动完成之前的时段内，投影装置200的工作原理包括：
传感器模块2011用于采集待保护物体发出的红外信号，将采集到的红外信号转换为传感信号，并将传感信号发送至信号转换模块2012。信号转换模块2012用于在接收到该传感信号时，将传感信号转换为检测信号，并向激光光源控制单元203发送检测信号。激光光源控制单元203用于接收该检测信号，基于检测信号判断激光投影区域内是否存在待保护物体，在确定激光投影区域内存在待保护物体时，激光光源控制单元203调节投影参数，并向光源驱动模块2041发送携带有调节后的投影参数的调节信号。光源驱动模块2041用于基于调节信号向光源模块2042提供驱动信号。光源模块2042用于在驱动信号的驱动下发出光线。其中，该激光光源控制单元203、光源驱动模块2041和光源模块2042的工作原理，可以相应参考前述实施例一中的激光光源控制单元203、光源驱动模块2041和光源模块2042的工作原理，本申请实施例在此不做赘述。
可选地，如图5所示，该投影装置200还包括：第一存储单元205。激光光源控制单元203在确定激光投影区域内存在待保护物体时，从第一存储单元205中获取第一提示画面的画面信息，并基于第一提示画面的画面信息，向光源模 块2042发送第一控制信号。光源模块2042用于在第一控制信号的控制作用下，发出用于显示第一提示画面的光线。该投影装置200显示该第一提示画面的过程可以参考前述实施例一中显示第一提示画面的过程，本申请实施例在此不做赘述。
可选地，该第一存储单元205可以设置在激光光源控制单元203的外部，也可以设置在激光光源控制单元203的内部，本申请实施例对第一存储单元205的位置不做限定，图5以该第一存储单元205设置在激光光源控制单元203的内部为例进行说明。
在多媒体板单元202启动完成之后，投影装置200的工作原理包括：
传感器模块2011用于采集待保护物体发出的红外信号，将采集到的红外信号转换为传感信号，并将传感信号发送至信号转换模块2012。信号转换模块2012用于在接收到该传感信号时，将传感信号转换为检测信号，并向激光光源控制单元203发送检测信号。激光光源控制单元203用于接收该检测信号，基于检测信号判断激光投影区域内是否存在待保护物体，在确定激光投影区域内存在待保护物体时，激光光源控制单元203调节投影参数，并向光源驱动模块2041发送携带有调节后的投影参数的调节信号。光源驱动模块2041用于基于调节信号向光源模块2042提供驱动信号。光源模块2042用于在驱动信号的驱动下发出光线。该激光光源控制单元203、光源驱动模块2041和光源模块2042的工作原理，均可以相应参考前述实施例一中的激光光源控制单元203、光源驱动模块2041和光源模块2042的工作原理，本申请实施例在此不做赘述。
并且多媒体板单元202包括多媒体主控模块2022该多媒体主控模块2022启动完成后，还用于向激光光源控制单元203的第一逻辑控制模块2031发送第二指示信号，该第二指示信号用于指示多媒体板单元202启动完成。
可选地，如图5所示，该投影装置还包括：第二存储单元206，第二存储单元206用于存储第二提示画面的画面信息。第一逻辑控制模块2031在确定激光投影区域内存在待保护物体时，基于第二指示信号向多媒体主控模块2022发送第三指示信号，该第三指示信号用于指示激光投影区域内存在待保护物体。多媒体主控模块2022基于第三指示信号，从第二存储单元206中获取第二提示画面的画面信息，并向激光光源控制单元203的显示驱动模块2032发送显示信号，该显示信号携带有第二提示画面的画面信息。显示驱动模块2032基于该显示信 号向光源模块2042发送第二控制信号。光源模块2042在该第二控制信号的控制作用下，发出用于显示第二提示画面的光线。该第二控制信号对光阀的控制作用可以参考前述实施例一中第一控制信号对光阀的控制作用，该第二提示画面的显示过程可以参考前述实施例一中第二提示画面的显示过程，本申请实施例在此不做赘述。
其中，多媒体主控模块2022可以与第一逻辑控制模块2031以及显示驱动模块2032均建立有通信连接，第二指示信号、第三指示信号和显示信号均可以为符合该通信协议的信号。示例地，假设多媒体主控模块2022与第一逻辑控制模块2031和显示驱动模块2032均建立有I 2C连接，则第二指示信号、第三指示信号和显示信号均可以为I 2C信号。
可选地，该第二存储单元206可以设置在多媒体板单元202的外部，也可以设置在多媒体板单元202的内部，本申请实施例对第二存储单元206的位置不做限定，图5以该第二存储单元206设置在多媒体板单元202的内部为例进行说明。
在本申请实施例中，由于传感器模块2011发送的传感信号的大小通常为几毫伏(mv)，若直接将该传感信号发送至激光光源控制单元203或者多媒体板单元202，会导致激光光源控制单元203或者多媒体板单元202无法识别该传感信号，进而无法对该传感信号进行处理，因此，在将该传感信号发送至激光光源控制单元203或者多媒体板单元202之前，需要对该传感信号进行放大等一系列处理操作，以使激光光源控制单元203或者多媒体板单元202能够识别并处理该传感信号。此外，当信号转换模块2012未接收到传感器模块2011发送的传感信号时，信号转换模块2012可以向激光光源控制单元203或者多媒体板单元202发送状态指示信号，以指示信号转换模块2012未接收到传感器模块2011发送的传感信号。示例地，该状态指示信号的电平可以持续为高电平。
可选地，信号转换模块2012可以先对接收到的传感信号进行放大处理，并对放大后的传感信号进行比较处理和逻辑处理，得到检测信号。示例地，图6和图7均为本申请实施例提供的一种投影装置的结构示意图，图6所示的投影装置200对应实施例一所述的投影装置200，图7所示的投影装置对应实施例二所述的投影装置200。如图6或图7所示，该信号转换模块2012可以包括：放 大子模块20121、比较子模块20122和逻辑子模块20123。
放大子模块20121用于对传感信号进行放大处理，示例地，放大子模块20121可以通过运算放大器电路对传感信号进行放大处理。如图6或图7所示，传感器模块2011发送的传感信号为信号A，放大子模块20121对该信号A的幅值进行放大后得到信号B。例如，信号A的最大值为2mv，放大子模块20121对该信号A进行放大处理后得到信号B，该信号B的最大值为2.5v；再例如，信号A的最小值为0.5mv，放大子模块20121对该信号A进行放大处理后得到信号B，该信号B的最小值为0.5v。
比较子模块20122中存储有高电压阈值和低电压阈值，比较子模块20122可以将放大后的传感信号在不同时刻的幅值的绝对值分别与高电压阈值和低电压阈值进行比较，得到两个脉冲信号。示例地，比较子模块20122可以通过两个比较电路将放大后的传感信号转换得到两个脉冲信号。如图6或图7所示，比较子模块20122中存储有高电压阈值a1和低电压阈值a2，将信号B在不同时刻的幅值的绝对值与高电压阈值a1进行比较，可得到脉冲信号C。其中，当信号B在某时刻的幅值的绝对值大于高电压阈值a1时，脉冲信号C在该时刻电平为高电平，当信号B在某时刻的幅值绝对值小于高电压阈值a1时，脉冲信号C在该时刻电平为低电平。将信号B在不同时刻的幅值的绝对值与低电压阈值a2进行比较，得到脉冲信号D。其中，当信号B在某时刻的幅值的绝对值大于低电压阈值a2时，脉冲信号D在该时刻电平为高电平，当信号B在某时刻的幅值的绝对值小于a2时，脉冲信号D在该时刻电平为低电平。
逻辑子模块20123可以对比较子模块20122输出的两个脉冲信号进行逻辑或操作，以得到检测信号。示例地，该检测信号可以为脉冲信号，逻辑子模块20123可以通过逻辑或门对比较子模块20122输出的两个脉冲信号进行逻辑或操作，以得到一个脉冲信号。如图6或图7所示，逻辑子模块20123可以对脉冲信号C和脉冲信号D进行逻辑或操作，得到脉冲信号E。
综上所述，本申请实施例提供的投影装置，激光光源控制单元在接收到开开机指令后且多媒体板单元启动完成之前的时段内，在确定激光光源单元的激光投影区域内存在待保护物体时，将调节后的投影参数发送至激光光源单元，激光光源单元基于调节后的投影参数发出光线，而相关技术中，由多媒体板单元指示激光光源控制单元调节投影参数，但多媒体板单元在激光光源单元之后 启动完成，因此，本申请实施例提供的投影装置相较于相关技术，在多媒体板单元启动完成之前，激光光源控制单元能够指示激光光源单元基于调节后的投影参数发出光线，使得在接收到开机指令后，投影装置即能够实现人眼保护功能，从而提高了投影装置的安全性。
下面介绍本申请实施例的投影方法。
请参考图8，图8为本申请实施例提供的一种投影方法的流程图，该方法可以应用于本申请实施例提供的投影装置，例如，可以应用于图2至图7所示的投影装置200。则该方法包括：
步骤301、检测单元在接收到用于检测激光投影区域内是否存在待保护物体的检测信号时，向激光光源控制单元发送检测信号。
步骤302、激光光源控制单元在接收到开机指令后且多媒体板单元启动完成之前的时段内，接收检测信号，并在基于检测信号确定激光光源单元的激光投影区域内存在待保护物体时，向激光光源单元发送调节信号。
该调节信号携带有调节后的投影参数，该投影参数用于指示调整激光光源单元中至少一个激光光源的发光亮度。
步骤303、激光光源单元在调节信号的控制下发出光线。
综上所述，本申请实施例提供的投影方法，激光光源控制单元在接收到开开机指令后且多媒体板单元启动完成之前的时段内，在确定激光光源单元的激光投影区域内存在待保护物体时，将调节后的投影参数发送至激光光源单元，激光光源单元基于调节后的投影参数发出光线，而相关技术中，由多媒体板单元指示激光光源控制单元调节投影参数，但多媒体板单元在激光光源单元之后启动完成，因此，本申请实施例提供的投影装置相较于相关技术，在多媒体板单元启动完成之前，激光光源控制单元能够指示激光光源单元基于调节后的投影参数发出光线，使得在接收到开机指令后，投影装置即能够实现人眼保护功能，从而提高了投影装置的安全性。
对应投影装置200进行投影显示的多种实现方式，该投影方法的实现方式也有多种。下面分别针对上述两种实施例，对每种实施例对应的投影方法进行说明。
请参考图9，图9为本申请实施例提供的另一种投影方法的流程图，该投影方法可以应用于上述实施例一所示的投影装置，例如，该方法可以应用于图2、图3、图4或图6所示的投影装置200，该方法可以包括：
步骤401、传感器模块接收到红外信号，并基于红外信号向信号转换模块发送传感信号。
示例地，传感器模块接收到待保护物体发出的红外信号后，可以将该红外信号转换为传感信号，并将该传感信号发送至信号转换模块。
步骤402、信号转换模块基于传感信号向激光光源控制单元和多媒体板单元发送检测信号。
该检测信号由信号转换模块将传感信号转换得到。示例地，信号转换模块可以对接收到的传感信号依次执行放大处理、比较处理和逻辑处理，以得到检测信号。
步骤403、在接收到开机指令后且多媒体板单元启动完成之前的时段内，激光光源控制单元接收检测信号，并在基于检测信号确定激光光源单元的激光投影区域内存在待保护物体时，调节投影参数，向光源驱动模块发送携带有调节后的投影参数的调节信号，同时，从第一存储单元中获取第一提示画面的画面信息，并基于第一提示画面的画面信息，向光源模块发送第一控制信号。
该投影参数用于指示调整光源模块中至少一个激光光源的发光亮度。
步骤404、光源驱动模块基于调节信号向光源模块提供驱动信号。
步骤405、光源模块在驱动信号和第一控制信号的作用下，发出用于显示第一提示画面的光线。
步骤406、多媒体板单元在启动完成后，向激光光源控制单元发送停止指示信号。
该停止指示信号用于指示激光光源控制单元停止检测激光投影区域内是否存在待保护物体。
步骤407、激光光源控制单元在接收到停止指示信号后，停止检测激光投影区域内是否存在待保护物体。
步骤408、多媒体板单元在启动完成后，接收检测信号，并在基于检测信号确定激光投影区域内存在待保护物体时，向激光光源控制单元发送第一指示信号，从第二存储单元中获取第二提示画面的画面信息，并基于第二提示画面的 信息向激光光源控制单元发送显示信号。
该第一指示信号用于指示激光投影区域内存在待保护物体，该显示信号携带有第二提示画面的画面信息。
步骤409、激光光源控制单元基于第一指示信号调节投影参数，并向光源驱动模块发送携带有调节后的投影参数的调节信号，以及基于显示信号向光源模块发送第二控制信号。
步骤410、光源驱动模块基于调节信号向光源模块提供驱动信号。
步骤411、光源模块在驱动信号和第二控制信号的作用下，发出用于显示第二提示画面的光线。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的投影方法的各个步骤的原理和过程，可以参考前述实施例一中的对应原理和过程，本申请实施例在此不再赘述。
请参考图10，图10为本申请实施例提供的再一种投影方法的流程图，该投影方法可以应用于上述实施例二所示的投影装置，例如，该方法可以应用于图2、图3、图5或图7所示的投影装置200，该方法可以包括：
步骤501、传感器模块接收到红外信号，并基于接收到的红外信号向信号转换模块发送传感信号。
步骤502、信号转换模块基于传感信号向激光光源控制单元发送检测信号。
步骤503、在接收到开机指令后且多媒体板单元启动完成之前的时段内，激光光源控制单元接收检测信号，并在基于检测信号确定激光光源单元的激光投影区域内存在待保护物体时，调节投影参数，向光源驱动模块发送携带有调节后的投影参数的调节信号，同时，从第一存储单元中获取第一提示画面的画面信息，并基于第一提示画面的画面信息，向光源模块发送第一控制信号。
步骤504、光源驱动模块基于调节信号向光源模块提供驱动信号。
步骤505、光源模块在驱动信号和第一控制信号的作用下，发出用于显示第一提示画面的光线。
步骤506、多媒体板单元在启动完成后，向激光光源控制单元发送第二指示信号。
该第二指示信号用于指示多媒体板单元启动完成。
步骤507、激光光源控制单元在确定激光投影区域内存在待保护物体时，调节投影参数，向光源驱动模块发送携带有调节后的投影参数的调节信号，并基于第二指示信号向多媒体板单元发送第三指示信号。
该第三指示信号用于指示激光投影区域内存在待保护物体。
步骤508、光源驱动模块基于调节信号向光源模块提供驱动信号。
步骤509、多媒体板单元基于第三指示信号从第二存储单元中获取第二提示画面的画面信息。
步骤510、多媒体板单元基于第二提示画面的画面信息向激光光源控制单元发送显示信号。
该显示信号携带有第二提示画面的画面信息。
步骤511、激光光源控制单元基于显示信号向光源模块发送第二控制信号。
步骤512、光源模块在驱动信号和第二控制信号的作用下，发出用于显示第二提示画面的光线。
综上所述，本申请实施例提供的投影方法，激光光源控制单元在接收到开开机指令后且多媒体板单元启动完成之前的时段内，在确定激光光源单元的激光投影区域内存在待保护物体时，将调节后的投影参数发送至激光光源单元，激光光源单元基于调节后的投影参数发出光线，而相关技术中，由多媒体板单元指示激光光源控制单元调节投影参数，但多媒体板单元在激光光源单元之后启动完成，因此，本申请实施例提供的投影装置相较于相关技术，在多媒体板单元启动完成之前，激光光源控制单元能够指示激光光源单元基于调节后的投影参数发出光线，使得在接收到开机指令后，投影装置即能够实现人眼保护功能，从而提高了投影装置的安全性。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的投影方法的各个步骤的原理和过程，可以参考前述实施例二中的对应原理和过程，本申请实施例在此不再赘述。
本领域技术人员在考虑说明书及实践这里申请的申请后，将容易想到本申请的其它实施方案。本申请旨在涵盖本申请的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本申请的一般性原理并包括本申请未申请的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性 的，本申请的真正范围和精神由权利要求指出。
应当理解的是，本申请并不局限于上面已经描述并在附图中示出的精确结构，并且可以在不脱离其范围进行各种修改和改变。本申请的范围仅由所附的权利要求来限制。

Claims (10)

  1. 一种投影装置，包括：
    检测单元，用于在接收到用于检测激光投影区域内是否存在待保护物体的检测信号时，向激光光源控制单元发送所述检测信号；激光光源控制单元，用于在接收到开机指令后且所述多媒体板单元启动完成之前的时段内，接收所述检测信号，并在基于所述检测信号确定所述激光光源单元的激光投影区域内存在待保护物体时，向所述激光光源单元发送调节信号，所述调节信号携带有调节后的投影参数，所述投影参数用于指示调整所述激光光源单元中至少一个激光光源的发光亮度；
    多媒体板单元；
    激光光源单元，用于在所述调节信号的控制下发出光线。
  2. 根据权利要求1所述的装置，还包括：第一存储单元；
    所述激光光源控制单元，还用于在确定所述激光投影区域内存在待保护物体时，从所述第一存储单元中获取第一提示画面的画面信息，并基于所述第一提示画面的画面信息，向所述激光光源单元发送第一控制信号；
    所述激光光源单元，用于在所述第一控制信号的控制作用下，发出用于显示所述第一提示画面的光线。
  3. 根据权利要求1或2所述的装置，在所述多媒体板单元启动完成后，所述多媒体板单元用于接收所述检测信号，并在基于所述检测信号确定所述激光投影区域内存在待保护物体时，向所述激光光源控制单元发送第一指示信号，所述第一指示信号用于指示所述激光投影区域内存在所述待保护物体；
    所述激光光源控制单元，用于基于所述第一指示信号向所述激光光源单元发送所述调节信号；
    所述多媒体板单元还用于向所述激光光源控制单元发送停止指示信号，所述停止指示信号用于指示所述激光光源控制单元停止检测所述激光投影区域内是否存在所述待保护物体。
  4. 根据权利要求3所述的装置，还包括：第二存储单元；
    在所述多媒体板单元启动完成后，所述多媒体板单元还用于在确定所述激 光投影区域内存在所述待保护物体时，从所述第二存储单元中获取第二提示画面的画面信息，向所述激光光源控制单元发送显示信号，所述显示信号携带有所述第二提示画面的画面信息；
    所述激光光源控制单元，用于基于所述显示信号向所述激光光源单元发送第二控制信号；
    所述激光光源单元，用于在所述第二控制信号的控制作用下，发出用于显示所述第二提示画面的光线。
  5. 根据权利要求1或2所述的装置，还包括：第二存储单元；
    在所述多媒体板单元启动完成后，所述多媒体板单元还用于向所述激光光源控制单元发送第二指示信号，所述第二指示信号用于指示所述多媒体板单元启动完成；
    所述激光光源控制单元，还用于在确定所述激光投影区域内存在待保护物体时，基于所述第二指示信号向所述多媒体板单元发送第三指示信号，所述第三指示信号用于指示所述激光投影区域内存在所述待保护物体；
    所述多媒体板单元，还用于基于所述第三指示信号，从所述第二存储单元中获取第二提示画面的画面信息，并向所述激光光源控制单元发送显示信号，所述显示信号携带有所述第二提示画面的画面信息；
    所述激光光源控制单元，用于基于所述显示信号向所述激光光源单元发送第二控制信号；
    所述激光光源单元，用于在所述第二控制信号的控制作用下，发出用于显示所述第二提示画面的光线。
  6. 一种投影方法，包括：
    检测单元在接收到用于检测激光投影区域内是否存在待保护物体的检测信号时，向激光光源控制单元发送所述检测信号；
    所述激光光源控制单元在接收到开机指令后且多媒体板单元启动完成之前的时段内，接收所述检测信号，并在基于所述检测信号确定激光光源单元的激光投影区域内存在待保护物体时，向所述激光光源单元发送调节信号，所述调节信号携带有调节后的投影参数，所述投影参数用于指示调整所述激光光源单元中至少一个激光光源的发光亮度；
    所述激光光源单元在所述调节信号的控制下发出光线。
  7. 根据权利要求6所述的方法，还包括：
    所述激光光源控制单元在确定所述激光投影区域内存在待保护物体时，从第一存储单元中获取第一提示画面的画面信息，并基于第一提示画面的画面信息，向所述激光光源单元发送第一控制信号；
    所述激光光源单元在所述第一控制信号的控制作用下，发出用于显示所述第一提示画面的光线。
  8. 根据权利要求6或7所述的方法，还包括：
    在所述多媒体板单元启动完成后，所述多媒体板单元接收所述检测信号，并在基于所述检测信号确定所述激光投影区域内存在待保护物体时，向所述激光光源控制单元发送第一指示信号，所述第一指示信号用于指示所述激光投影区域内存在所述待保护物体；
    所述激光光源控制单元基于所述第一指示信号向所述激光光源单元发送所述调节信号；
    所述多媒体板单元向所述激光光源控制单元发送停止指示信号，所述停止指示信号用于指示所述激光光源控制单元停止检测所述激光投影区域内是否存在所述待保护物体。
  9. 根据权利要求8所述的方法，还包括：
    在所述多媒体板单元启动完成后，所述多媒体板单元在确定所述激光投影区域内存在所述待保护物体时，从第二存储单元中获取第二提示画面的画面信息，向所述激光光源控制单元发送显示信号，所述显示信号携带有所述第二提示画面的画面信息；
    所述激光光源控制单元基于所述显示信号向所述激光光源单元发送第二控制信号；
    所述激光光源单元在所述第二控制信号的控制作用下，发出用于显示所述第二提示画面的光线。
  10. 根据权利要求6或7所述的方法，还包括：
    在所述多媒体板单元启动完成后，所述多媒体板单元向所述激光光源控制单元发送第二指示信号，所述第二指示信号用于指示所述多媒体板单元启动完成；
    所述激光光源控制单元在确定所述激光投影区域内存在待保护物体时，基 于所述第二指示信号向所述多媒体板单元发送第三指示信号，所述第三指示信号用于指示所述激光投影区域内存在所述待保护物体；
    所述多媒体板单元基于所述第三指示信号，从第二存储单元中获取第二提示画面的画面信息，并向所述激光光源控制单元发送显示信号，所述显示信号携带有所述第二提示画面的画面信息；
    所述激光光源控制单元基于所述显示信号向所述激光光源单元发送第二控制信号；
    所述激光光源单元在所述第二控制信号的控制作用下，发出用于显示所述第二提示画面的光线。
PCT/CN2020/087351 2019-06-20 2020-04-28 投影方法及装置 Ceased WO2020253387A1 (zh)

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