CN112312107A - Optical path control method, device, equipment and storage medium - Google Patents
Optical path control method, device, equipment and storage medium Download PDFInfo
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- CN112312107A CN112312107A CN202011235612.0A CN202011235612A CN112312107A CN 112312107 A CN112312107 A CN 112312107A CN 202011235612 A CN202011235612 A CN 202011235612A CN 112312107 A CN112312107 A CN 112312107A
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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
- H04N9/3155—Modulator illumination systems for controlling the light source
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- 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
- G03B21/206—Control of light source other than position or intensity
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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
- H04N9/3164—Modulator illumination systems using multiple light sources
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Abstract
The invention relates to the technical field of electronics, and discloses a method, a device, equipment and a storage medium for controlling a light path, wherein the method comprises the following steps: receiving an input signal, and determining the optical path transition duration according to the frame rate of the current input signal when the intensity of the input signal changes; controlling the on-off states of the plurality of color lamps and the plurality of light shields within the light path transition time so that light emitted by each color lamp is input into the light path one by one; and controlling the output signals of the color lamps based on the current input signal until the next input signal is received. Therefore, when the triggering mode is edge triggering, the stable light of each color lamp is input into the light path one by one during the rising edge and the falling edge, so that the stability of the brightness is improved, and the projection effect is enhanced.
Description
Technical Field
The present invention relates to the field of electronic technologies, and in particular, to a method, an apparatus, a device, and a storage medium for controlling an optical path.
Background
With the development of electronic technology, Light Emitting Diode (LED) projectors are increasingly used. The LED projector generally adopts an LED light source, the service life of the LED light source is as long as more than 20,000 hours, and the service life of the LED light source is about 10 times of that of the traditional projector. Thus, the LED projector overcomes the defect that the bulb of the traditional projector needs to be replaced frequently.
The current LED is generally triggered by an edge, which may cause the projection brightness to be reduced in the rising edge or falling edge stage, thereby affecting the projection effect.
Disclosure of Invention
The invention provides a light path control method, a light path control device, light path control equipment and a storage medium, and aims to improve the stability of brightness and enhance the projection effect.
To achieve the above object, the present invention provides an optical path control method applied to an optical path control apparatus including a plurality of color lamps and a corresponding plurality of shutters, the method including:
receiving an input signal, and determining the optical path transition duration according to the frame rate of the current input signal when the intensity of the input signal changes;
controlling the on-off states of the plurality of color lamps and the plurality of light shields within the light path transition time so that light emitted by each color lamp is input into the light path one by one;
and controlling the output signals of the color lamps based on the current input signal until the next input signal is received.
Optionally, the step of controlling the on-off states of the plurality of color lamps and the plurality of shutters within the light path transition duration to enable light emitted by each color lamp to be input into the light path one by one includes:
determining the lighting time length of each color lamp according to the duty ratio of each color lamp and the light path transition time length, wherein each color lamp comprises a first color lamp, a second color lamp and a third color lamp, and the lighting time length comprises a first lighting time length, a second lighting time length and a third lighting time length corresponding to each color lamp;
and controlling the respective light-on time of each color lamp to enter a light-on state according to a preset flow, and correspondingly controlling the on-off state of each light chopper, so that the light emitted by each color lamp is input into the light path within the respective lighting time.
Optionally, the step of controlling the respective lighting time of each color lamp to enter a lighting state according to a preset flow, and correspondingly controlling the switching state of each light shield, so that the light emitted by each color lamp within the respective lighting duration is input into the light path includes:
controlling the first light chopper to enter a closed state, so that light emitted by the first color lamp is input into the light path within the first lighting time;
when the second light-on time of the second color lamp is reached, controlling the second light chopper and the second color lamp to enter an on state;
when the lighting time length of the first color lamp reaches the first lighting time length, controlling the second light chopper to enter a closed state, so that light emitted by the second color lamp is input into the light path in a second lighting time length, controlling the first light chopper to enter an open state, and controlling the first color lamp to enter the closed state;
when the third lamp turning-on time of the third color lamp is reached, controlling the third light chopper and the third color lamp to enter a turning-on state;
when the lighting time of the second color lamp reaches the second lighting time, controlling the third light chopper to enter a closed state, so that light emitted by the third color lamp is input into the light path in the third lighting time, controlling the second light chopper to enter an open state, and controlling the second color lamp to enter the closed state;
and when the lighting time of the third color lamp reaches the third lighting time, controlling the third light chopper to enter an open state and controlling the third color lamp to enter a closed state.
Optionally, before the step of controlling the first shutter to enter the closed state, the step of inputting the light emitted by the first color lamp into the light path within the first lighting time further includes:
and determining the lighting time of each color lamp according to the lighting time of each color lamp and the preset stabilization time so that each color lamp enters a stable state before the lighting time, wherein the lighting time comprises a first lighting time, a second lighting time and a third lighting time corresponding to each color lamp.
Optionally, the step of determining the lighting time of each color lamp according to the lighting time of each color lamp and the preset stabilization time includes:
determining a first light-on time of the first color lamp according to the ending time of the last input signal and the preset stabilization time of the first color lamp;
determining a second light-on time of the second color light according to the ending time of the last input signal, the first lighting time, the second lighting time and the preset stabilization time of the second color light;
and determining the third lighting moment of the third color lamp according to the second lighting time and the preset stabilization time of the third color lamp.
Optionally, the step of determining the optical path transition duration according to the frame rate of the current input signal includes:
acquiring the frame rate of the current input signal, and determining the optical path transition duration based on a preset frame rate-optical path transition duration mapping table.
Optionally, the step of controlling the output signals of the respective color lamps based on the pixel value of the current input signal until receiving a next input signal further includes:
and determining a new optical path transition time length according to the frame rate of the next input signal, and controlling the on-off state of each dimmer of each color lamp according to the new optical path transition time length until an ending instruction is received.
Further, to achieve the above object, the present invention also provides an optical path control device including:
the device comprises a determining module, a judging module and a judging module, wherein the determining module is used for receiving an input signal, and determining the optical path transition duration according to the frame rate of the current input signal when the intensity of the input signal changes;
the first control module is used for controlling the on-off states of the plurality of color lamps and the plurality of light choppers within the light path transition duration so that light emitted by each color lamp is input into the light path one by one;
and the second control module is used for controlling the output signals of all the color lamps based on the current input signal until the next input signal is received.
Further, to achieve the above object, the present invention also provides an optical path control apparatus comprising a processor, a memory, and an optical path control program stored in the memory, the optical path control program being executed by the processor to implement the steps of the optical path control method as described above.
Further, to achieve the above object, the present invention also provides a computer storage medium having stored thereon an optical path control program which, when executed by a processor, implements the steps of the optical path control method as described above.
Compared with the prior art, the invention provides a light path control method, a device, equipment and a storage medium, wherein the method comprises the following steps: receiving an input signal, and determining the optical path transition duration according to the frame rate of the current input signal when the intensity of the input signal changes; controlling the on-off states of the plurality of color lamps and the plurality of light shields within the light path transition time so that light emitted by each color lamp is input into the light path one by one; and controlling the output signals of the color lamps based on the current input signal until the next input signal is received. Therefore, when the triggering mode is edge triggering, the stable light of each color lamp is input into the light path one by one during the rising edge and the falling edge, so that the stability of the brightness is improved, and the projection effect is enhanced.
Drawings
Fig. 1 is a hardware configuration diagram of an optical path control apparatus according to embodiments of the present invention;
fig. 2 is a schematic flow chart of a first embodiment of the optical path control method of the present invention;
fig. 3 is a schematic diagram of an edge brightness unstable scene according to a first embodiment of the optical path control method of the present invention;
FIG. 4 is a schematic diagram of an optical path including a plurality of color lamps and a plurality of shutters according to a first embodiment of the optical path control method of the present invention;
fig. 5 is a detailed step of controlling the state of the switch involved in the first embodiment of the optical path control method of the present invention;
fig. 6 is a schematic diagram of a luminance scene according to the first embodiment of the optical path control method of the present invention;
FIG. 7 is a luminance energy-time diagram of a first embodiment of the optical path control method of the present invention;
fig. 8 is a functional block diagram of the optical path control apparatus according to the first embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The optical path control device mainly related to the embodiment of the invention refers to a network connection device capable of realizing network connection, and the optical path control device can be a server, a cloud platform and the like.
Referring to fig. 1, fig. 1 is a hardware configuration diagram of an optical path control apparatus according to embodiments of the present invention. In this embodiment of the present invention, the optical path control device may include a processor 1001 (e.g., a Central Processing Unit, CPU), a communication bus 1002, an input port 1003, an output port 1004, and a memory 1005. The communication bus 1002 is used for realizing connection communication among the components; the input port 1003 is used for data input; the output port 1004 is used for data output, the memory 1005 may be a high-speed RAM memory, or a non-volatile memory (non-volatile memory), such as a magnetic disk memory, and the memory 1005 may optionally be a storage device independent of the processor 1001. Those skilled in the art will appreciate that the hardware configuration depicted in FIG. 1 is not intended to be limiting of the present invention, and may include more or less components than those shown, or some components in combination, or a different arrangement of components.
With continued reference to fig. 1, the memory 1005 of fig. 1, which is a readable storage medium, may include an operating system, a network communication module, an application program module, and an optical path control program. In fig. 1, the network communication module is mainly used for connecting to a server and performing data communication with the server; and the processor 1001 may call the optical path control program stored in the memory 1005 and execute the optical path control method provided by the embodiment of the present invention.
The embodiment of the invention provides a light path control method.
Referring to fig. 2, fig. 2 is a flowchart illustrating a first embodiment of the optical path control method according to the present invention.
In this embodiment, the optical path control method is applied to an optical path control apparatus, and the method includes:
step S101, receiving an input signal, and determining an optical path transition duration according to the frame rate of the current input signal when the intensity of the input signal changes;
step S102, controlling the on-off states of the plurality of color lamps and the plurality of light shields within the light path transition duration, so that light emitted by each color lamp is input into a light path one by one;
and step S103, controlling the output signals of the color lamps based on the current input signal until the next input signal is received.
The light path referred to in this embodiment refers to an LED light path based on the three primary color principles of R (red), G (green), and B (blue). The RGB three primary colors have 256-level gray scale and can be mixed randomly to generate 256 multiplied by 16777216 colors, thereby forming multiple combined change ends of different light colors and realizing rich and colorful dynamic change effect and various images. The light path control device according to the present embodiment may be any device based on RGB three primary color imaging, such as an LED projector, a laser, and the like.
Generally, an image frame or a video frame to be projected, generally, a frame image or a frame video represents a voltage signal, and the voltage signal strength of different images or videos is different. The intensity of the voltage signal may be caused to change when the image frame to be projected is switched, for example, the intensity of the voltage signal may rise or fall at the switching point. When edge triggering is used as a triggering mode, triggering occurs when the rising edge or the falling edge of the voltage signal change reaches a certain threshold value. Generally, at the rising edge or the falling edge, the projection brightness is reduced due to the switching of the voltage signal, which gives a poor visual experience to the user. Specifically, referring to fig. 3, fig. 3 is a schematic diagram of an edge brightness unstable scene related to the first embodiment of the optical path control method of the present invention. As shown in fig. 3, at the rising edge a1 and the falling edge a2 of the first color lamp; the rising edge b1 and the falling edge b2 of the second color lamp; the brightness of the third color lamp is unstable during the rising edge c1 and the falling edge c 2.
To account for the reduction in projected brightness during a rising or falling edge, the present embodiment invokes the light path control method during a rising or falling edge.
Specifically, the input signal described in step S101 may be a voltage signal. Further, the step of determining the optical path transition duration according to the frame rate of the current input signal includes:
acquiring the frame rate of the current input signal, and determining the optical path transition duration based on a preset frame rate-optical path transition duration mapping table. The Frame rate (Frame rate) is the frequency (rate) at which bitmap images called units of frames appear continuously on the display. The frame rate may also be referred to as a frame frequency and is expressed in hertz (Hz). The number of frames per second (fps), or frame rate, indicates the number of updates per second that the graphics processor can update while processing. A high frame rate may result in a smoother, more realistic animation. Generally speaking, if the frame rate of the viewed picture is higher than 15Hz, the picture is considered coherent, and the phenomenon is called persistence of vision; 30Hz is acceptable, but increasing performance to 60Hz can significantly increase cross-talk and fidelity, but a significant fluency increase is generally not easily perceived beyond 75 Hz. If the frame rate exceeds the screen refresh rate, graphics processing power is wasted because the monitor cannot be updated at such a fast rate, and thus the frame rate exceeding the refresh rate is wasted. Therefore, frame rates are typically set between 15-60Hz depending on image display requirements and device performance.
It can be understood that the number of times of refreshing images at different frame rates in a unit time is different, and therefore, the durations of the rising edge and the falling edge are also different.
After the optical path transition duration is determined, executing step S102: and controlling the on-off states of the plurality of color lamps and the plurality of light shields within the light path transition time, so that the light emitted by each color lamp is input into the light path one by one.
Specifically, the color lamps include a first color lamp, a second color lamp and a third color lamp, and the light shield includes a first light shield corresponding to the first color lamp, a second light shield corresponding to the second color lamp and a third light shield corresponding to the third color lamp. Controlling the on-off state of the first shutter may control whether the light of the first color lamp is input into the light path: when the first light shield is in an open state, the light emitted by the first color lamp can be shielded, and the light emitted by the first color lamp cannot be input into the light path; when the state of the second light chopper is the closed state, the light emitted by the second color lamp cannot be blocked, and the light emitted by the second color lamp can be input into the optical path; similarly, the second light shield and the third light shield can control the light input optical path of the second color lamp or the third color lamp. In the present embodiment, the first color lamp, the second color lamp, and the third color lamp are one of the R lamp, the G lamp, and the B lamp, but the first color lamp, the second color lamp, and the third color lamp are different from each other. For example, the first color lamp, the second color lamp and the third color lamp can be an R lamp, a G lamp and a B lamp respectively, or a B lamp, a G lamp and an R lamp respectively, or an R lamp, a B lamp and a G lamp respectively. Specifically, referring to fig. 4, fig. 4 is a schematic diagram of an optical path including a plurality of color lamps and a plurality of shutters according to a first embodiment of the optical path control method of the present invention. As shown in fig. 4, corresponding shutters are disposed between the R lamp, the G lamp, the B lamp and the optical path, and when the shutters are opened, the light emitted from the corresponding color lamps can be blocked and not emitted to the optical path.
Specifically, referring to fig. 5, fig. 5 is a detailed step of controlling the state of the switch involved in the first embodiment of the optical path control method of the present invention;
the step of controlling the on-off states of the plurality of color lamps and the plurality of light shields within the light path transition time so that the light emitted by each color lamp is input into the light path one by one comprises the following steps:
step S1021: determining the lighting time length of each color lamp according to the duty ratio of each color lamp and the light path transition time length, wherein each color lamp comprises a first color lamp, a second color lamp and a third color lamp, and the lighting time length comprises a first lighting time length, a second lighting time length and a third lighting time length corresponding to each color lamp;
step S1022: and controlling the respective light-on time of each color lamp to enter a light-on state according to a preset flow, and correspondingly controlling the on-off state of each light chopper, so that the light emitted by each color lamp is input into the light path within the respective lighting time.
Specifically, the Duty Ratio (Duty Ratio) refers to a Ratio of the energization time to the total time within one cycle. Duty cycle has the following meaning in the field of telecommunications: for example: the pulse width is 1 mus and the duty cycle of the pulse sequence is 0.25 for a signal period of 4 mus.
In this embodiment, the ratio of the duty ratios of the respective color lamps may be preset, for example, the ratio is set to 1:1:1, or 1:2:1, etc. The lighting time of each color lamp can be determined based on the duty ratio and the light path transition time, for example, if the light path transition time is 1 μ s and the ratio is 1:1:1, the lighting time of each color lamp is 1/3 μ s. Thus, the first polishing time length, the second polishing time length and the third polishing time length can be obtained.
Specifically, the step S1022 includes:
controlling the first light chopper to enter a closed state, so that light emitted by the first color lamp is input into the light path within the first lighting time; in this embodiment, the first color lamp is turned on at a predetermined first lamp-on time, and the corresponding first light chopper is turned on, and when an input signal triggers a preset rising edge or falling edge threshold value, the first light chopper is turned off to dim the brightness caused by instability of the light source output by the LED, and the light emitted by the first color lamp is directed into the light path. And the time length of the light emitted by the first color lamp entering the light path is controlled to be a first preset lighting time length.
Further, the lighting time of each color lamp is determined according to the lighting time length of each color lamp and the preset stable time, so that each color lamp enters a stable state before the lighting time, wherein the lighting time comprises a first lighting time, a second lighting time and a third lighting time corresponding to each color lamp.
In this embodiment, the preset temperature time is a time after the color lamp is turned on until the voltage is stabilized, and is generally determined empirically. Therefore, the light of the input light path of each color lamp can be ensured to be stable in the corresponding lighting time period.
Specifically, first, a first light-on time of a first color lamp is determined according to an end time of a last input signal and a preset stabilization time of the first color lamp; and determining the first lamp-on time as the time of the preset stable time of the color lamp before the ending time. For example, if the end time of the last input signal is Th1 and the preset stable time is t1, the corresponding first turn-on time is Th1-t 1. In this way, the first color lamp is turned on in advance, so that the light source which is turned on and is at the temperature can be directly provided when the input signal triggers a preset rising edge threshold value or a preset falling edge threshold value.
Determining a second light-on time of the second color light according to the ending time of the last input signal, the first lighting time, the second lighting time and the preset stabilization time of the second color light; and determining the third lighting moment of the third color lamp according to the second lighting time and the preset stabilization time of the third color lamp.
It can be understood that the moment of adding the first lighting time period To1 To the ending moment Th1 of the last input signal is the input light moment Th2 of the second color lamp, that is, the moment of inputting light into the optical path by the second color lamp, and since the second color lamp needs To be turned on in advance, the second light-on moment of the second color lamp is determined as the moment of subtracting the preset temperature time t2 of the second color lamp from Th2, that is, Th2-t 2. Similarly, the third lighting moment of the third color lamp can be determined: the moment of adding the second lighting time period to the input light moment Th2 of the second color lamp is the input light moment Th3 of the third color lamp, so that the third lighting moment of the third color lamp is determined as the moment of subtracting the preset temperature time t3 from Th3, namely Th3-t 3.
When the second light-on time of the second color lamp is reached, controlling the second light chopper and the second color lamp to enter an on state; turning on the second color lamp and turning on the second shutter prevents light of the second color lamp from being input into the optical path in advance.
When the lighting time length of the first color lamp reaches the first lighting time length, controlling the second light chopper to enter a closed state, so that light emitted by the second color lamp is input into the light path in a second lighting time length, controlling the first light chopper to enter an open state, and controlling the first color lamp to enter the closed state; the second shutter is closed and the first shutter is opened so that only the light of the second color lamp is input to the light path. While the first color light is turned off.
When the third lamp turning-on time of the third color lamp is reached, controlling the third light chopper and the third color lamp to enter a turning-on state; turning on the third color lamp and turning on the third shutter prevents light of the third color lamp from being input into the optical path in advance.
When the lighting time of the second color lamp reaches the second lighting time, controlling the third light chopper to enter a closed state, so that light emitted by the third color lamp is input into the light path in the third lighting time, controlling the second light chopper to enter an open state, and controlling the second color lamp to enter the closed state; the third shutter is closed and the second shutter is opened so that only the light of the third color lamp is input to the light path. While the second color light is turned off.
And when the lighting time of the third color lamp reaches the third lighting time, controlling the third light chopper to enter an open state and controlling the third color lamp to enter a closed state. And after the third polishing time is reached, opening a third light chopper and closing the third color lamp.
Therefore, stable light can be input to the light path at the rising edge and the falling edge.
Specifically, referring to fig. 6, fig. 6 is a schematic diagram of a luminance scene related to the first embodiment of the optical path control method of the present invention. As shown in fig. 6, the lighting time of the first color lamp is R1, the light source has stabilized by the time of R2, the lighting time is R3-R2, the first color lamp is turned off at the time of R3, and the first color lamp is turned off completely by the time of R4; the lamp-on time of the second color lamp is G1, the lamp-on time is G3-G2, the second color lamp is turned off at the G3 time, and the second color lamp is completely turned off at the G4 time; the lamp-on time of the third color lamp is B1, the lamp-on time is B3-B2, the third color lamp is turned off at the time of B3, and the third color lamp is completely turned off at the time of B4. Wherein, R3 and G2 are the same time point, and G3 and B2 are the same time point. Therefore, in the period that each color lamp is turned on in sequence, the color lamps are turned on in advance, the corresponding light chopper is turned on, the light chopper is turned off at the time point corresponding to the time when the lamp is turned on, and the time when each lamp is turned on can be completely and stably transmitted to the light path, so that the problem of dimming of the brightness caused by the rising edge and the falling edge is solved.
Further, referring to fig. 7, fig. 7 is a luminance energy time diagram of the first embodiment of the optical path control method of the present invention; fig. 7A is a graph of luminance energy-time affected by an edge in the prior art; fig. 7B is a diagram of luminance energy versus time for eliminating the edge effect by the optical path control method in this embodiment; therefore, it can be clearly seen that the energy affected by the edge is significantly reduced at the rising edge and the falling edge, but the brightness energy of the light path control method provided by the embodiment can be always in a stable state.
After the optical path transition time period, step S103 is executed: and controlling the output signals of the color lamps based on the current input signal until the next input signal is received.
And controlling the output signals of the various color lamps according to the current input signal to display images or videos of various colors until the next input signal is received.
And further, determining a new optical path transition time length according to the frame rate of the next input signal, and controlling the on-off state of each dimmer of each color lamp according to the new optical path transition time length until an ending instruction is received.
Because the input signals of each frame of image are different, when the next input signal of the next frame of image is received, the new light path transition time length needs to be determined again according to the steps, and the on-off state of each dimmer of each color lamp is controlled according to the new light path transition time length until the ending instruction is received. That is, the operations involved in the optical path control method are repeatedly performed all the time during the operation of the optical path control apparatus.
According to the scheme, the method comprises the steps of receiving an input signal, and determining the optical path transition duration according to the frame rate of the current input signal when the intensity of the input signal changes; controlling the on-off states of the plurality of color lamps and the plurality of light shields within the light path transition time so that light emitted by each color lamp is input into the light path one by one; and controlling the output signals of the color lamps based on the current input signal until the next input signal is received. Therefore, when the triggering mode is edge triggering, the stable light of each color lamp is input into the light path one by one during the rising edge and the falling edge, so that the stability of the brightness is improved, and the projection effect is enhanced.
In addition, the embodiment also provides an optical path control device. Referring to fig. 8, fig. 8 is a functional block diagram of the optical path control device according to the first embodiment of the present invention.
In this embodiment, the optical path control device is a virtual device, and is stored in the memory 1005 of the optical path control apparatus shown in fig. 1, so as to implement all functions of the optical path control program: the optical path transition duration determining device is used for receiving an input signal, and determining the optical path transition duration according to the frame rate of the current input signal when the intensity of the input signal changes; the light path switching device is used for controlling the on-off states of the plurality of color lamps and the plurality of light shields within the light path transition time length so that light emitted by each color lamp is input into the light path one by one; and the control circuit is used for controlling the output signals of all the color lamps based on the current input signal until receiving the next input signal.
Specifically, referring to fig. 8, the optical path control apparatus includes:
the determining module 10 is configured to receive an input signal, and determine an optical path transition duration according to a frame rate of a current input signal when an intensity of the input signal changes;
the first control module 20 is configured to control the on-off states of the multiple color lamps and the multiple shutters within the optical path transition duration, so that light emitted by each color lamp is input to the optical path one by one;
and a second control module 30, configured to control the output signals of the color lamps based on the current input signal until a next input signal is received.
Further, the first control module is further configured to:
determining the lighting time length of each color lamp according to the duty ratio of each color lamp and the light path transition time length, wherein each color lamp comprises a first color lamp, a second color lamp and a third color lamp, and the lighting time length comprises a first lighting time length, a second lighting time length and a third lighting time length corresponding to each color lamp;
and controlling the respective light-on time of each color lamp to enter a light-on state according to a preset flow, and correspondingly controlling the on-off state of each light chopper, so that the light emitted by each color lamp is input into the light path within the respective lighting time.
Further, the first control module is further configured to:
controlling the first light chopper to enter a closed state, so that light emitted by the first color lamp is input into the light path within the first lighting time;
when the second light-on time of the second color lamp is reached, controlling the second light chopper and the second color lamp to enter an on state;
when the lighting time length of the first color lamp reaches the first lighting time length, controlling the second light chopper to enter a closed state, so that light emitted by the second color lamp is input into the light path in a second lighting time length, controlling the first light chopper to enter an open state, and controlling the first color lamp to enter the closed state;
when the third lamp turning-on time of the third color lamp is reached, controlling the third light chopper and the third color lamp to enter a turning-on state;
when the lighting time of the second color lamp reaches the second lighting time, controlling the third light chopper to enter a closed state, so that light emitted by the third color lamp is input into the light path in the third lighting time, controlling the second light chopper to enter an open state, and controlling the second color lamp to enter the closed state;
and when the lighting time of the third color lamp reaches the third lighting time, controlling the third light chopper to enter an open state and controlling the third color lamp to enter a closed state.
Further, the first control module is further configured to:
and determining the lighting time of each color lamp according to the lighting time of each color lamp and the preset stabilization time so that each color lamp enters a stable state before the lighting time, wherein the lighting time comprises a first lighting time, a second lighting time and a third lighting time corresponding to each color lamp.
Further, the first control module is further configured to:
determining a first light-on time of the first color lamp according to the ending time of the last input signal and the preset stabilization time of the first color lamp;
determining a second light-on time of the second color light according to the ending time of the last input signal, the first lighting time, the second lighting time and the preset stabilization time of the second color light;
and determining the third lighting moment of the third color lamp according to the second lighting time and the preset stabilization time of the third color lamp.
Further, the determining module is further configured to:
acquiring the frame rate of the current input signal, and determining the optical path transition duration based on a preset frame rate-optical path transition duration mapping table.
Further, the second control module is further configured to:
and determining a new optical path transition time length according to the frame rate of the next input signal, and controlling the on-off state of each dimmer of each color lamp according to the new optical path transition time length until an ending instruction is received.
In addition, an embodiment of the present invention further provides a computer storage medium, where an optical path control program is stored on the computer storage medium, and when the optical path control program is executed by a processor, the steps of the optical path control method are implemented, which are not described herein again.
Compared with the prior art, the optical path control method, the optical path control device, the optical path control equipment and the storage medium provided by the invention receive the input signal, and when the intensity of the input signal changes, the optical path transition duration is determined according to the frame rate of the current input signal; controlling the on-off states of the plurality of color lamps and the plurality of light shields within the light path transition time so that light emitted by each color lamp is input into the light path one by one; and controlling the output signals of the color lamps based on the current input signal until the next input signal is received. Therefore, when the triggering mode is edge triggering, the stable light of each color lamp is input into the light path one by one during the rising edge and the falling edge, so that the stability of the brightness is improved, and the projection effect is enhanced.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium (e.g., ROM/RAM, magnetic disk, optical disk) as described above and includes instructions for causing a terminal device to execute the method according to the embodiments of the present invention.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structures or flow transformations made by the present specification and drawings, or applied directly or indirectly to other related arts, are included in the scope of the present invention.
Claims (10)
1. An optical path control method applied to an optical path control apparatus including a plurality of color lamps and a corresponding plurality of shutters, the method comprising:
receiving an input signal, and determining the optical path transition duration according to the frame rate of the current input signal when the intensity of the input signal changes;
controlling the on-off states of the plurality of color lamps and the plurality of light shields within the light path transition time so that light emitted by each color lamp is input into the light path one by one;
and controlling the output signals of the color lamps based on the current input signal until the next input signal is received.
2. The method according to claim 1, wherein the step of controlling the on-off states of the plurality of color lamps and the plurality of shutters during the optical path transition period such that the light emitted from each color lamp is input into the optical path one by one comprises:
determining the lighting time length of each color lamp according to the duty ratio of each color lamp and the light path transition time length, wherein each color lamp comprises a first color lamp, a second color lamp and a third color lamp, and the lighting time length comprises a first lighting time length, a second lighting time length and a third lighting time length corresponding to each color lamp;
and controlling the respective light-on time of each color lamp to enter a light-on state according to a preset flow, and correspondingly controlling the on-off state of each light chopper, so that the light emitted by each color lamp is input into the light path within the respective lighting time.
3. The method according to claim 2, wherein the step of controlling the respective lighting time of each color lamp to enter the lighting state according to the preset flow and corresponding to the switching state of each light chopper, so that each color lamp inputs the emitted light into the light path within the respective lighting time period comprises:
controlling the first light chopper to enter a closed state, so that light emitted by the first color lamp is input into the light path within the first lighting time;
when the second light-on time of the second color lamp is reached, controlling the second light chopper and the second color lamp to enter an on state;
when the lighting time length of the first color lamp reaches the first lighting time length, controlling the second light chopper to enter a closed state, so that light emitted by the second color lamp is input into the light path in a second lighting time length, controlling the first light chopper to enter an open state, and controlling the first color lamp to enter the closed state;
when the third lamp turning-on time of the third color lamp is reached, controlling the third light chopper and the third color lamp to enter a turning-on state;
when the lighting time of the second color lamp reaches the second lighting time, controlling the third light chopper to enter a closed state, so that light emitted by the third color lamp is input into the light path in the third lighting time, controlling the second light chopper to enter an open state, and controlling the second color lamp to enter the closed state;
and when the lighting time of the third color lamp reaches the third lighting time, controlling the third light chopper to enter an open state and controlling the third color lamp to enter a closed state.
4. The method of claim 3, wherein the step of controlling the first shutter to enter the closed state for the light emitted by the first color lamp to enter the light path within the first lighting time further comprises:
and determining the lighting time of each color lamp according to the lighting time of each color lamp and the preset stabilization time so that each color lamp enters a stable state before the lighting time, wherein the lighting time comprises a first lighting time, a second lighting time and a third lighting time corresponding to each color lamp.
5. The method of claim 4, wherein the step of determining the lighting time of each color lamp according to the lighting time of each color lamp and the preset stable time comprises:
determining a first light-on time of the first color lamp according to the ending time of the last input signal and the preset stabilization time of the first color lamp;
determining a second light-on time of the second color light according to the ending time of the last input signal, the first lighting time, the second lighting time and the preset stabilization time of the second color light;
and determining the third lighting moment of the third color lamp according to the second lighting time and the preset stabilization time of the third color lamp.
6. The method of claim 1, wherein the step of determining the optical path transition duration according to the frame rate of the current input signal comprises:
acquiring the frame rate of the current input signal, and determining the optical path transition duration based on a preset frame rate-optical path transition duration mapping table.
7. The method according to any one of claims 1 to 6, wherein the step of controlling the output signal of each color lamp based on the pixel value of the current input signal until receiving a next input signal further comprises:
and determining a new optical path transition time length according to the frame rate of the next input signal, and controlling the on-off state of each dimmer of each color lamp according to the new optical path transition time length until an ending instruction is received.
8. An optical path control device characterized by comprising:
the device comprises a determining module, a judging module and a judging module, wherein the determining module is used for receiving an input signal, and determining the optical path transition duration according to the frame rate of the current input signal when the intensity of the input signal changes;
the first control module is used for controlling the on-off states of the plurality of color lamps and the plurality of light choppers within the light path transition duration so that light emitted by each color lamp is input into the light path one by one;
and the second control module is used for controlling the output signals of all the color lamps based on the current input signal until the next input signal is received.
9. An optical path control apparatus comprising a processor, a memory, and an optical path control program stored in the memory, the optical path control program when executed by the processor implementing the steps of the optical path control method according to any one of claims 1 to 7.
10. A computer storage medium having stored thereon an optical path control program that, when executed by a processor, implements the steps of the optical path control method according to any one of claims 1 to 7.
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