Projector optical path test adjustment method and device

Abstract

The embodiment of the present invention relates to the technical field of projection equipment, and discloses a method and device for adjusting the optical path of a projector, the method comprising: controlling each optical element fixing device to move to a first position; controlling each optical element to project a projection image on a screen; controlling an imaging acquisition device to acquire first imaging information on the screen, acquiring first imaging information; determining the first projection state according to the first imaging information and a projection state algorithm; if the difference between the first projection state and the theoretical projection state is greater than a preset range, controlling a target optical element fixing device to move to a second position; acquiring second imaging information on the screen of the target optical element fixing device, and calculating the second projection state; calculating the difference between the second projection state and the theoretical projection state until the difference is less than a range threshold, and obtaining the target position of each optical element. The present invention can effectively detect the projection state of the projector, and automatically adjust the optical path, thereby improving the efficiency of optical path verification of the projector optical element.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of projection equipment, and in particular to a method and device for testing and adjusting the optical path of a projector. Background Art

[0002] At present, with the needs of social development, the market demand for projectors is also growing. Among them, LCD projectors are small in size and cost-effective, and account for a relatively large share of the projection market. The core optical and mechanical part of the research and development of LCD projectors is mainly to determine the component materials, confirm the optical path and wind path, and confirm the heat dissipation and structure. The existing method is to convert the 3D model into a real projector device and then verify the component efficiency, optical path, wind path and other parameters after assembly. The intuitive manifestation is the lumen and clarity of the projection display. After confirmation, the 3D model is optimized and converted into a real material structure. This process is repeated until a mature product appears. The research and development cycle is long and the cost is high.

[0003] In the prior art, for the development of LCD projectors, it is necessary to determine the projection optical path structure based on the characteristics and parameter specifications of components, such as light sources, light buckets, mirrors, lenses, and other materials, while considering the air duct and heat dissipation method, and convert the drawings through stacking modeling. After the structure is perfected, physical 3D proofing is performed, so that after the structural support and component assembly, the light effect and other parameters of the light source in this optical path are verified to obtain the final presentation effect, the lumens and uniformity of the projection optical path and other parameters; however, the above traditional methods have a long research and development cycle and many uncertain factors, and often require several proofing verification adjustments. Moreover, because the projection optical path parameters have a direct impact on the final imaging effect, a slight adjustment of the optical path will have a great change. Therefore, each re-proofing requires modifying the drawing structure and then issuing the structure sample. The optical path verification cycle is long and the efficiency is low. There are too many limitations when verifying the optical path, and components cannot be replaced at will because changes in component parameters will also cause changes in the optical path. Summary of the invention

[0004] In view of the above problems, an embodiment of the present invention provides a projector optical path test adjustment method and device, which are used to solve the problems of long optical component optical path verification cycle and low efficiency in the projector development process in the prior art.

[0005] According to one aspect of an embodiment of the present invention, a method for testing and adjusting a projector optical path is provided, which is applied to a control device in a projector optical path testing and adjusting device, wherein the projector optical path testing and adjusting device comprises a base, an XYZ three-axis sliding mechanism arranged on the base, a control device arranged on the base, a plurality of optical element fixing devices and a screen arranged in sequence on the XYZ three-axis sliding mechanism, a positioning device arranged on each optical element fixing device, and an imaging acquisition device for acquiring imaging information on the screen; wherein each optical element of the projector is fixed on the corresponding optical element fixing device in sequence according to the optical path sequence; the plurality of optical elements comprise an optical path light source, a focusing system, a rear Fresnel mirror, a heat-insulating glass, a liquid crystal panel, a front Fresnel mirror and a lens, and each of the optical element fixing devices is connected by a retractable and deformable optical channel structure; the method comprises:

[0006] Controlling each optical element fixing device to move to its corresponding first position according to the simulated relative position between each optical element;

[0007] After each optical element reaches the first position, controlling each optical element to work so as to project a projection image onto the screen;

[0008] Controlling the imaging acquisition device to acquire the first imaging information on the screen, and acquiring the first imaging information; the first imaging information is used to reflect the clarity information, uniformity information, lumen information, and picture color temperature information of the first projected picture;

[0009] Determine a first projection state according to the first imaging information and a preset projection state algorithm; the projection state algorithm includes at least one of a clarity algorithm, a uniformity algorithm, a lumen algorithm, and a picture color temperature algorithm; the first projection state includes at least one of current clarity, current uniformity, current lumen, and current picture color temperature;

[0010] If the difference between the first projection state and the theoretical projection state is greater than a preset range, the target optical element fixture is controlled to move on the XYZ three-axis sliding mechanism according to a preset step length to a second position; the target optical element fixture is any one or more of all the optical element fixtures; the difference between the first projection state and the theoretical projection state is calculated based on at least one of the difference between the current clarity and the preset clarity, the difference between the current uniformity and the preset uniformity, the difference between the current lumens and the preset lumens, and the difference between the current picture color temperature and the preset picture color temperature;

[0011] The second imaging information of the screen when the target optical element fixing device is in the second position is obtained, and the second projection state is calculated according to the second imaging information; if the second projection state is consistent with the theoretical lumen information and the image clarity information, the difference between the projection state in the second position and the theoretical projection state is determined, and if it is greater than a preset range, the position of the target optical element is continuously adjusted until the difference is less than a preset range threshold, thereby obtaining the target position of each optical element.

[0012] In an optional manner, before the control device determines the corresponding relationship between the theoretical projection state and the relative position of the optical element and the actual parameter information of the current optical element according to the theoretical parameter range and the theoretical relative position of each optical element, the method includes:

[0013] The actual parameter information and simulated relative position of each optical element input by the user are obtained; wherein the simulated relative position is the relative position of each optical element of the projector simulated according to the actual parameter information of each optical element by optical simulation software.

[0014] In an optional manner, the imaging acquisition device includes an image acquisition module and an illumination acquisition module, and the first imaging information includes a first screen image and a first light illumination; the controlling the imaging acquisition device to acquire the first imaging information on the screen and acquiring the first imaging information includes:

[0015] Acquire a first planar image formed on the screen by the image acquisition module; and,

[0016] The first illuminance of the light irradiating the screen is acquired through an illuminance acquisition module.

[0017] In an optional manner, the first projection state includes first lumen information, first uniformity information and first clarity information, and the preset projection state algorithm includes a lumen algorithm and a clarity algorithm; and determining the first projection state according to the first projection image, the first uniformity algorithm and the preset projection state algorithm includes:

[0018] The first lumen information is calculated according to the first illuminance and the lumen algorithm; the lumen algorithm is expressed as: Among them, ANSI is the lumen value, is the average illuminance, is the first illuminance of the nth point on the screen, and S is the projection area;

[0019] Calculating the first uniformity information according to the lumen value of each area of ​​the nine-square grid of the first screen image on the screen and the first uniformity algorithm;

[0020] The first uniformity algorithm is:

[0021] ;

[0022] Among them, U1 is the first uniformity information, is the lumen value of the middle area of ​​the nine-square grid on the screen; are respectively the lumen values ​​of the four corner areas of the nine-square grid on the screen;

[0023] The first definition information is calculated according to the first screen image and the definition algorithm; wherein the definition algorithm is:

[0024]

[0025] in, For clarity, is the gray value of the corresponding pixel point (x, y) in the first screen image. In an optional manner, if the difference between the first projection state and the theoretical projection state is greater than a preset range, the target optical element fixture is controlled to move on the XYZ three-axis sliding mechanism according to a preset step length to move to the second position, including: if the difference between the first lumen information and the theoretical lumen information is greater than a first preset threshold, and / or the difference between the first clarity information and the theoretical clarity information is greater than a second preset threshold, the target optical element fixture is controlled to move on the XYZ three-axis sliding mechanism according to a preset step length to move to the second position.

[0026] In an optional manner, the controlling target optical element fixing device to move on the XYZ three-axis sliding mechanism according to a preset step length to move to the second position comprises:

[0027] The relative distance between the target optical element fixture and the previous or next optical element fixture is slightly adjusted according to the preset step length, and the relative distances between other optical element fixtures are adjusted unchanged. At this time, the target optical element fixture moves to the second position; wherein, the positioning device corresponding to each optical element fixture sends a positioning signal in real time to determine that each optical element fixture moves to the corresponding position.

[0028] In an optional manner, the projector optical path test and adjustment device further includes at least one heat sink, which is disposed on the base and is used to dissipate heat from the optical element; the method further includes:

[0029] When the projector optical path test and adjustment device is working, the heat sink is controlled to work so as to dissipate heat for the optical element.

[0030] According to another aspect of an embodiment of the present invention, a projector optical path test and adjustment device is provided, the projector optical path test and adjustment device comprising a base, an XYZ three-axis sliding mechanism arranged on the base, a control device arranged on the base, a plurality of optical element fixing devices and a screen arranged in sequence on the XYZ three-axis sliding mechanism, a positioning device arranged on each optical element fixing device, and an imaging acquisition device for acquiring imaging information on the screen;

[0031] Among them, each optical element of the projector is fixed on the corresponding optical element fixing device in sequence according to the optical path sequence; the multiple optical elements include an optical path light source, a focusing system, a rear Fresnel mirror, a heat-insulating glass, a liquid crystal panel, a front Fresnel mirror and a lens, and each of the optical element fixing devices is connected by a retractable and deformable optical channel structure;

[0032] An XYZ three-axis sliding mechanism is used to drive the plurality of optical element fixing devices to slide along the XYZ directions;

[0033] A plurality of optical element fixing devices, used for fixing and installing various optical elements;

[0034] A positioning device, used for positioning the optical element fixing device;

[0035] a screen for presenting images emitted through the lens;

[0036] An image acquisition device, used to acquire a screen image presented on the screen and send it to a control device;

[0037] A control device, used for controlling each optical element fixing device to move to a first position corresponding to each other according to the simulated relative position between each optical element;

[0038] The XYZ three-axis sliding mechanism is used to drive each optical element fixing device to move to its corresponding first position according to the simulated relative position sent by the control device;

[0039] The control device is further used to control each optical element to work after each optical element reaches the first position, so as to project the projection image on the screen; control the imaging acquisition device to acquire first imaging information on the screen, and acquire the first imaging information, wherein the first imaging information is used to reflect the clarity information, uniformity information, lumen information, and picture color temperature information of the first projected picture; determine the first projection state according to the first imaging information and a preset projection state algorithm, wherein the projection state algorithm includes at least one of a clarity algorithm, a uniformity algorithm, a lumen algorithm, and a picture color temperature algorithm; the first projection state includes the current clarity , current uniformity, current lumens and current picture color temperature; if the difference between the first projection state and the theoretical projection state is greater than a preset range, the target optical element fixture is controlled to move on the XYZ three-axis sliding mechanism according to a preset step length to a second position, wherein the difference between the first projection state and the theoretical projection state is calculated based on at least one of the difference between the current clarity and the preset clarity, the difference between the current uniformity and the preset uniformity, the difference between the current lumens and the preset lumens, and the difference between the current picture color temperature and the preset picture color temperature; the target optical element fixture is any one or more of all the optical element fixtures;

[0040] The XYZ three-axis sliding mechanism is also used to drive the target optical element to move to the corresponding second position according to the second position information sent by the control device;

[0041] The control device is also used to obtain second imaging information of the screen when the target optical element fixing device is in the second position, and calculate the second projection state according to the second imaging information; if the difference between the second projection state and the theoretical projection state is greater than a preset range, the position of the target optical element is continuously adjusted until the difference is less than a preset range threshold, thereby obtaining the target position of each optical element.

[0042] In an optional manner, the imaging acquisition device includes an image acquisition module and an illumination acquisition module, and the first imaging information includes a first screen image and a first light illumination; and the control device is specifically used for:

[0043] Acquire a first planar image formed on the screen by the image acquisition module; and,

[0044] The first illuminance of the light irradiating the screen is acquired through an illuminance acquisition module.

[0045] In an optional embodiment, the telescopic and deformable light channel structure includes a support rod, a transverse telescopic rod, a longitudinal telescopic rod, a universal hinge ball and a blackout cloth; the two ends of one transverse telescopic rod are connected to one end of two vertical telescopic rods and one end of two longitudinal telescopic rods through a universal shaft; the two ends of multiple blackout cloths are respectively connected to the transverse telescopic rod and the longitudinal telescopic rod; the length of the blackout cloth when it is unfolded to the maximum extent is greater than the maximum distance between two optical element fixing devices.

[0046] The projector optical path test and adjustment device of the embodiment of the present invention comprises a base, an XYZ three-axis sliding mechanism arranged on the base, a control device arranged on the base, a plurality of optical element fixing devices and a screen arranged on the XYZ three-axis sliding mechanism in sequence, a positioning device arranged on each optical element fixing device, and an imaging acquisition device for acquiring imaging information on the screen; wherein, each optical element of the projector is fixed on the corresponding optical element fixing device in sequence according to the optical path sequence; the plurality of optical elements include an optical path light source, a focusing system, a rear Fresnel mirror, a heat-insulating glass, a liquid crystal panel, a front Fresnel mirror and a lens, and each of the optical element fixing devices is connected by a retractable and deformable optical channel structure. By fine-tuning the relative position relationship of each optical element on the XYZ three-axis sliding mechanism, and calculating the projection state through an algorithm, when the projection state is not good, the position relationship of each optical element is continuously fine-tuned, so that the optical path of the projector can be tested and adjusted efficiently and automatically, thereby improving the development speed of the projector.

[0047] The above description is only an overview of the technical solution of the embodiment of the present invention. In order to more clearly understand the technical means of the embodiment of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The accompanying drawings are only used to illustrate the embodiments and are not to be considered as limiting the present invention. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings. In the accompanying drawings:

[0049] Figure 1 A schematic structural diagram of a projector optical path test and adjustment device provided by an embodiment of the present invention without a shading cloth is shown;

[0050] Figure 2 A schematic diagram of the structure of a universal articulated ball in an optical channel structure of a projector optical path test and adjustment device provided in an embodiment of the present invention is shown;

[0051] Figure 3 A schematic diagram showing the structure of a projector optical path test and adjustment device provided in an embodiment of the present invention is shown;

[0052] Figure 4 A schematic diagram showing the structure of a universal articulated ball in an optical channel structure of a projector optical path test and adjustment device provided by another embodiment of the present invention is shown;

[0053] Figure 5 A schematic cross-sectional structure diagram of a universal articulated ball, a shading cloth, and a transverse telescopic rod in the optical channel structure of a projector optical path test and adjustment device provided in an embodiment of the present invention is shown;

[0054] Figure 6 A schematic flow chart of a projector optical path test and adjustment method provided in an embodiment of the present invention is shown.

[0055] in:

[0056] Base 100, XYZ three-axis sliding mechanism 101, X-axis 1011, Y-axis 1012, Z-axis 1013, optical element fixing device 200, support rod 201, support sleeve 2012, telescopic structure 2011, universal hinge ball 202, rotating structure 2021, side hinge hole 2022, bottom hinge hole 2023, first cloth shielding channel 2024, second cloth shielding channel 2025, horizontal telescopic rod 203, vertical telescopic rod 204, shading cloth 205, light source 301, first dimming element 302, second dimming element 303, lens 304, screen 305, cooling fan 306, fan fixing plate 307, control device 400. DETAILED DESCRIPTION

[0057] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein.

[0058] The projector optical path test adjustment method in this application is based on the projector optical path test adjustment device. Figure 1 , which shows a schematic diagram of the structure of the projector optical path test and adjustment device provided by an embodiment of the present invention. The projector optical path test and adjustment device of the present application includes a base 100, an XYZ three-axis sliding mechanism 101 arranged on the base, a control device 400 arranged on the base, a plurality of optical element fixing devices 200 and a screen 305 arranged on the XYZ three-axis sliding mechanism 101 in sequence, a positioning device arranged on each optical element fixing device 200, and an imaging acquisition device for acquiring imaging information on the screen 305.

[0059] Among them, each optical element of the projector is fixed on the corresponding optical element fixing device 200 in sequence according to the optical path sequence. Multiple optical elements include an optical path light source 301, a dimming element and a lens 304, and each optical element fixing device 200 is connected by a retractable and deformable optical channel structure. Among them, the dimming element includes a first dimming element 302, a second dimming element 303, etc., such as a focusing system, a rear Fresnel mirror, a heat-insulating glass, a liquid crystal panel, a front Fresnel mirror, etc. In the embodiment of the present invention, the number of optical element fixing devices 200 is consistent with the number of optical elements, and the optical element fixing device 200 may include a base, which is fixed on the XYZ three-axis sliding mechanism 101, and each optical element is fixed on the base of each optical element fixing device 200 in sequence according to the optical path sequence. The optical element fixing device 200 may also include a base and a fixing member, the base is fixed on the XYZ three-axis sliding mechanism 101, and the fixing member is arranged on the base. The fixing member may be a hollow structure, and the hollow part is used to accommodate the optical element, wherein the shape of the hollow structure is consistent with the contour shape of the optical element.

[0060] In the embodiment of the present invention, the XYZ three-axis sliding mechanism 101 is used to drive the plurality of optical element fixing devices 200 to slide along the X direction, the Y direction and / or the Z direction, wherein the existing XYZ three-axis sliding mechanism 101 can be used, including a slide rail and a cylinder or a drive motor, the cylinder or the drive motor is electrically connected to the control device 400, and the embodiment of the present invention does not make specific restrictions. In a specific implementation of the present invention, it can include an X-axis 1011, a Z-axis 1013 arranged on the X-axis, and a Y-axis 1012 arranged on the Z-axis, wherein the X-axis 1011 and the Z-axis 1013, and the Z-axis 1013 and the Y-axis 1012 are respectively connected by sliding plates. A plurality of optical element fixing devices 200 are arranged on the XYZ three-axis sliding mechanism 101, and are respectively used to fix and install each optical element. Each optical element fixing device 200 can move in three-dimensional directions along the XYZ three-axis sliding mechanism 101, so that an optical light path is formed between each optical element. Among them, the positioning device (not shown in the figure) can be set on the optical element fixing device 200, and is used to position the optical element fixing device 200. For example, it can be a magnetic field sensor, an infrared sensor, or a grating, etc., which is not specifically limited in the embodiment of the present invention. The screen 305 is used to present the image emitted by the lens 304. The image acquisition device is used to acquire the screen 305 image presented on the screen 305 and send it to the control device 400. In the embodiment of the present invention, after simulating the optical path of each optical element of the projector to be designed according to the optical simulation software, the simulated relative position between each optical element can be determined. The actual parameter information and simulated relative position of each optical element input by the user are obtained; wherein, the simulated relative position is the relative position of each optical element of the projector obtained by simulation according to the actual parameter information of each optical element according to the optical simulation software. Since the simulated relative position determined theoretically according to the material and parameters of the optical element is the accurate position required for the projector to reach the ideal standard. However, since the material, size and parameters of the actual optical element may not reach the theoretical material, size and parameters, the relative position of the simulation is fine-tuned by the projector optical path test adjustment device of the present application.

[0061] The control device 400 is used to control each optical element fixing device 200 to move to the first position corresponding to each other according to the simulated relative position between each optical element. The control device 400 sends a first movement signal to the XYZ three-axis sliding mechanism 101, so that the optical element fixing device 200 on each slider of the XYZ three-axis sliding mechanism 101 moves to the respective position, which is recorded as the first position.

[0062] After each optical element reaches its first position, the control device 400 controls each optical element to work so as to project the projection image onto the screen 305. The control device 400 controls the light source 301 to emit light, and the light emitted by the light source 301 passes through the dimming device and the lens 304 and is projected onto the screen 305.

[0063] The control device 400 controls the imaging acquisition device to acquire the first imaging information on the screen 305, and acquires the first imaging information. The imaging acquisition device includes an image acquisition module and an illumination acquisition module. The first imaging information includes the first screen 305 image and the first illumination. The imaging acquisition device can be set above or below the lens 304, or can be the lens 304 itself, and the embodiment of the present invention does not make specific restrictions. The first imaging information is used to reflect the clarity information, uniformity information, lumen information, picture color temperature information and other information of the first projected picture. When the imaging acquisition device is the lens 304 itself, the first illumination can be determined by the CCD in the lens 304. The CCD in the lens 304 can determine the illumination by factors such as F value, color temperature, IRE level, and reflectivity. After receiving the imaging acquisition signal sent by the control device 400, the imaging acquisition device performs image and illumination acquisition. The image acquisition module acquires the first screen 305 image, and the illumination acquisition module acquires the first illumination. The first screen 305 image is the image of the image projected on the acquired screen 305. The first illuminance is the illuminance projected on the screen 305. The illuminance acquisition module in this embodiment can be the first screen 305 itself, and the illuminance acquisition module can be an illuminance sensing board, on which 9 sensing points are arranged (which can be respectively located at the intersections of the nine-square grid), and the first lumen information is calculated by the illuminance of the 9 points of the illuminance sensing board. When calculating the lumen, the projected image can be a black and white image.

[0064] The control device 400 determines the first projection state according to the first imaging information and a preset projection state algorithm. The projection state algorithm includes at least one of a clarity algorithm, a uniformity algorithm, a lumen algorithm, and a picture color temperature algorithm; the first projection state includes at least one of current clarity, current uniformity, current lumen, and current picture color temperature. The first lumen information can be calculated according to the first illuminance and the lumen algorithm. The lumen algorithm is expressed as:

[0065]

[0066] Among them, ANSI is the lumen value, is the average illuminance, is the first illuminance of the nth point on the screen 305 (which can be the illuminance of the nine intersection points of the nine-square grid), and S is the projection area.

[0067] Calculate first uniformity information according to the lumen value of each area of ​​the nine-square grid of the first screen image on the screen and the first uniformity algorithm;

[0068] The first uniformity algorithm is:

[0069] ;

[0070] Among them, U1 is the first uniformity information, is the lumen value of the middle area of ​​the nine-square grid of the first screen image on the screen; They are the lumen values ​​of the four corner areas of the nine-square grid on the screen.

[0071] The first definition information is calculated according to the first screen 305 image and the definition algorithm.

[0072] The clarity algorithm is:

[0073] in, For clarity, is the gray value of the corresponding pixel point (x, y) in the image of the first screen 305. The color temperature and uniformity can be calculated using the existing color temperature and uniformity calculation method, which will not be described in detail here.

[0074] The control device 400 determines the difference between the first projection state and the theoretical projection state. If the difference between the first projection state and the theoretical projection state is greater than a preset range, the target optical element fixture 200 is controlled to move on the XYZ three-axis sliding mechanism 101 according to a preset step length and move to the second position. The target optical element fixture 200 is any one or more of all the optical element fixtures 200. The theoretical projection state is obtained by simulation during simulation. The difference between the first projection state and the theoretical projection state is calculated based on at least one of the difference between the current clarity and the preset clarity, the difference between the current uniformity and the preset uniformity, the difference between the current lumens and the preset lumens, and the difference between the current picture color temperature and the preset picture color temperature. In one embodiment of the present invention, the difference weights can be set according to the above-mentioned differences, and the first projection state can be obtained by summing the differences and the difference weights, and then the difference between the first projection state and the preset theoretical projection state is compared, so that when the difference is less than the preset value, adjustment is made.

[0075] In another embodiment, the errors can be calculated according to the differences respectively, and the second positions of the target optical elements can be determined by deep learning. Specifically, the following steps are included:

[0076] Calculate the difference between the current definition and the preset definition, the difference between the current uniformity and the preset uniformity, the difference between the current lumens and the preset lumens, and the difference between the current picture color temperature and the preset picture color temperature;

[0077] The difference between the current clarity and the preset clarity, the difference between the current uniformity and the preset uniformity, the difference between the current lumens and the preset lumens, and the difference between the current picture color temperature and the preset picture color temperature are input into the preset deep learning algorithm to obtain the relative adjustment position between each target optical element; wherein the preset deep learning algorithm can be obtained by inputting the deep learning algorithm for training according to the relationship between the projection state sample and the distance between the optical element. wherein the projection state sample includes the difference samples of the clarity before and after adjustment, the difference samples of the current uniformity, the difference samples of the lumens, and the difference of the picture color temperature.

[0078] According to the relative adjustment position of each target optical element, the target optical element fixing device is controlled to move on the XYZ three-axis sliding mechanism according to a preset step length to move to the second position.

[0079] In a specific implementation, when the first projection state includes first lumen information and first clarity information, if the difference between the first lumen information and the theoretical lumen information is greater than a first preset threshold, and / or the difference between the first clarity information and the theoretical clarity information is greater than a second preset threshold, the target optical element fixing device is controlled to move on the XYZ three-axis sliding mechanism according to a preset step length to move to the second position.

[0080] The control device 400 obtains the second imaging information of the screen 305 when the target optical element fixing device 200 is in the second position, and calculates the second projection state according to the second imaging information; if the second projection state is consistent with the theoretical lumen information and the clarity information of the image, the difference between the projection state at the second position and the theoretical projection state is determined, and if it is greater than the preset range, the position of the target optical element is continuously adjusted until the difference is less than the preset range threshold, and the target position of each optical element is obtained. Since the simulated relative position during simulation is an approximate relatively accurate position, and due to the existence of parameter errors, etc., it may be necessary to fine-tune the relative position between each optical element to meet the design requirements of the projector. In other words, in the present application, the position of each optical element is continuously polled and fine-tuned to find the optimal target position. Among them, the control device 400 of the embodiment of the present invention is also used to communicate with the user terminal after obtaining the target position, and send the target position of each optical element to the terminal.

[0081] In the embodiment of the present invention, the telescopic and deformable optical channel structure includes a support rod 201, a transverse telescopic rod 203, a longitudinal telescopic rod 204, a universal articulated ball 202 and a shading cloth 205. Figure 2As shown, the transverse telescopic rod 203 and the longitudinal telescopic rod 204 are respectively connected to the two side hinge holes 2022 of the universal hinge ball 202. The upper end of the support rod 201 is rotatably arranged in the bottom hinge hole 2023 of the universal hinge ball 202, so that the universal hinge ball 202 can rotate relative to the support rod 201 in the XOY plane, and the upper end of the support rod 201 is a rotating structure 2021, which can realize the front and rear rotation of the support rod 201. In the embodiment of the present invention, the support rod 201 can also include a support sleeve 2012 and a telescopic structure 2011, and the telescopic structure 2011 can enable the support rod 201 to move up and down along the Z axis. Among them, a transverse telescopic rod 203 is connected to one edge of the blackout cloth 205, and the other end of the blackout cloth 205 falls vertically, thereby forming the side of the light channel to block the side gap. Among them, the two ends of the transverse telescopic rod 203 are respectively fixedly connected to the two ends of one side of the blackout cloth 205, the length of the side of the blackout cloth 205 is greater than or equal to the length of the telescopic rod when it is fully extended, and a plurality of fixings are arranged on the side for sliding connection with the transverse telescopic rod 203. In other words, the blackout cloth 205 and the transverse telescopic rod 203 are similar to curtain structures. And because the two ends of the side of the blackout cloth 205 are fixed to the two ends of the telescopic rod, when the transverse telescopic rod 203 is extended or retracted, the blackout cloth 205 is also driven to extend or fold accordingly. Every two adjacent longitudinal telescopic rods 204 are respectively connected to the two sides of the upper blackout cloth 205 for shielding the upper part of the light channel. Through such a setting, each side of the optical element is shielded to form a light channel. As shown in FIG. Figure 4 As shown, since the two ends of one side of the shading cloth 205 are fixed to the two ends of the telescopic rod, and the longitudinal telescopic rod 204 and the transverse telescopic rod 203 are respectively connected to the universal hinge ball 202, in order to avoid light leakage at the edge of the light channel of the shading cloth 205, a shading cloth channel (a first shading cloth channel 2024 and a second shading cloth channel 2025) is provided before the multiple hinge holes of the universal hinge ball 202, which is used to accommodate the part where the shading part is connected to the telescopic rod, so that the shading cloth 205 can be extended from the shading cloth channel to cover the edge of the light channel, as shown in FIG. Figure 5 As shown, it can be seen that the shade cloth 205 can pass through the universal joint ball 202, thereby achieving the effect of completely shielding the edge of the light channel. The length of the shade cloth 205 when it is fully extended is greater than the maximum distance between the two optical element fixing devices 200. The shade cloth 205 is a deformable shade material, such as a thin, opaque silicone material, etc., and the embodiment of the present invention does not make specific restrictions. For the convenience of illustration, Figure 1 To remove the structure of the shade cloth 205, Figure 3The structure has a shading cloth 205. The embodiment of the present invention also includes a heat dissipation fan 306, and the heat dissipation fan 306 is fixed to the base through a fan fixing plate 307. In one embodiment of the present invention, since there is a shading cloth 205 and heat dissipation is required, it is necessary to set a plurality of small heat dissipation holes on the shading cloth 205 on one side of the heat dissipation fan 306. In another embodiment of the present invention, the fan fixing plate 307 is fixedly connected to the optical element fixing device 200, and the fan fixing plate 307 is close to the side of the optical element fixing device 200, so that the fan fixing plate 307 forms a side of the light channel. In this way, while simplifying the structure, the shielding of the fan fixing plate 307 is used to realize a part of the light channel.

[0082] The projector optical path test and adjustment device of the embodiment of the present invention comprises a base, an XYZ three-axis sliding mechanism arranged on the base, a control device arranged on the base, a plurality of optical element fixing devices and a screen arranged on the XYZ three-axis sliding mechanism in sequence, a positioning device arranged on each optical element fixing device, and an imaging acquisition device for acquiring imaging information on the screen; wherein, each optical element of the projector is fixed on the corresponding optical element fixing device in sequence according to the optical path sequence; the plurality of optical elements include an optical path light source, a dimming element and a lens, and each of the optical element fixing devices is connected by a retractable and deformable optical channel structure. By fine-tuning the relative position relationship of each optical element on the XYZ three-axis sliding mechanism, and calculating the projection state through an algorithm, when the projection state is not good, the position relationship of each optical element is continuously fine-tuned, so that the optical path of the projector can be tested and adjusted efficiently and automatically, thereby improving the development speed of the projector.

[0083] Figure 6 The flowchart of the projector optical path test adjustment method provided by the embodiment of the present invention is shown. The method is executed by the projector optical path test adjustment device of the above embodiment. Specifically, it is executed by the control device of the projector optical path test adjustment device. Figure 6 As shown, the method comprises the following steps:

[0084] Step 110: Control each optical element fixing device to move to its corresponding first position according to the simulated relative position between each optical element. Before the control device determines the corresponding relationship between the theoretical projection state and the relative position of the optical element and the actual parameter information of the current optical element according to the theoretical parameter range and the theoretical relative position of each optical element, the method includes: obtaining the actual parameter information and the simulated relative position of each optical element input by the user; wherein the simulated relative position is the relative position of each optical element of the projector obtained by simulation according to the actual parameter information of each optical element by the optical simulation software.

[0085] Step 120: After each optical element reaches the first position, control the optical element to work so as to project the projection image onto the screen.

[0086] Step 130: Control the imaging acquisition device to acquire the first imaging information on the screen, and acquire the first imaging information.

[0087] The first imaging information is used to reflect the clarity information, uniformity information, lumen information, and picture color temperature information of the first projected picture.

[0088] Step 140: Determine a first projection state according to the first imaging information and a preset projection state algorithm.

[0089] Among them, the projection state algorithm includes at least one of a clarity algorithm, a uniformity algorithm, a lumen algorithm and a picture color temperature algorithm; the first projection state includes at least one of a current clarity, a current uniformity, a current lumen and a current picture color temperature.

[0090] The first plane image formed on the screen is acquired by the image acquisition module; and the first illuminance of the light irradiated to the screen is acquired by the illuminance acquisition module. Specifically, the first projection state includes first lumen information and first clarity information, and the preset projection state algorithm includes a lumen algorithm and a clarity algorithm.

[0091] Determining a first projection state according to the first projection image and a preset projection state algorithm includes:

[0092] The projection state algorithm includes at least one of a clarity algorithm, a uniformity algorithm, a lumen algorithm, and a picture color temperature algorithm; the first projection state includes at least one of current clarity, current uniformity, current lumen, and current picture color temperature. The first lumen information can be calculated based on the first illuminance and the lumen algorithm. The lumen algorithm is expressed as:

[0093] Among them, ANSI is the lumen value, is the average illuminance, is the first illuminance of the nth point on the screen 305 (which can be the illuminance of the nine intersection points of the nine-square grid), and S is the projection area.

[0094] Calculate first uniformity information according to the lumen value of each area of ​​the nine-square grid of the first screen image on the screen and the first uniformity algorithm;

[0095] The first uniformity algorithm is:

[0096]

[0097] Among them, U1 is the first uniformity information, is the lumen value of the middle area of ​​the nine-square grid of the first screen image on the screen; They are the lumen values ​​of the four corner areas of the nine-square grid on the screen.

[0098] The first definition information is calculated according to the first screen 305 image and the definition algorithm.

[0099] The clarity algorithm is:

[0100]

[0101] in, For clarity, is the gray value of the corresponding pixel point (x, y) in the image of the first screen 305. The color temperature and uniformity can be calculated using the existing color temperature and uniformity calculation method, which will not be described in detail here.

[0102] Step 150: If the difference between the first projection state and the theoretical projection state is greater than a preset range, the target optical element fixture is controlled to move on the XYZ three-axis sliding mechanism according to a preset step length to a second position; the target optical element fixture is any one or more of all the optical element fixtures.

[0103] Step 160: Obtain the second imaging information of the screen when the target optical element fixture is in the second position, and calculate the second projection state according to the second imaging information; if the difference between the second projection state and the theoretical projection state is greater than a preset range, continue to adjust the position of the target optical element until the difference is less than a preset range threshold, and obtain the target position of each optical element. If the difference between the first lumen information and the theoretical lumen information is greater than a first preset threshold, and / or the difference between the first clarity information and the theoretical clarity information is greater than a second preset threshold, control the target optical element fixture to move on the XYZ three-axis sliding mechanism according to a preset step length, and move to the second position.

[0104] Wherein, the relative distance between the target optical element fixture and the previous or next optical element fixture is slightly adjusted according to the preset step length, and the relative distances between other optical element fixtures are adjusted unchanged, and the target optical element fixture is moved to the second position; wherein, the positioning device corresponding to each optical element fixture sends a positioning signal in real time to determine that each optical element fixture moves to the corresponding position.

[0105] In the embodiment of the present invention, when the projector optical path test and adjustment device is working, the heat sink is controlled to work so as to dissipate heat for the optical element.

[0106] The projector optical path test and adjustment device of the embodiment of the present invention comprises a base, an XYZ three-axis sliding mechanism arranged on the base, a control device arranged on the base, a plurality of optical element fixing devices and a screen arranged on the XYZ three-axis sliding mechanism in sequence, a positioning device arranged on each optical element fixing device, and an imaging acquisition device for acquiring imaging information on the screen; wherein, each optical element of the projector is fixed on the corresponding optical element fixing device in sequence according to the optical path sequence; the plurality of optical elements include an optical path light source, a dimming element and a lens, and each of the optical element fixing devices is connected by a retractable and deformable optical channel structure. By fine-tuning the relative position relationship of each optical element on the XYZ three-axis sliding mechanism, and calculating the projection state through an algorithm, when the projection state is not good, the position relationship of each optical element is continuously fine-tuned, so that the optical path of the projector can be tested and adjusted efficiently and automatically, thereby improving the development speed of the projector.

[0107] The algorithm or display provided herein is not inherently related to any particular computer, virtual system or other equipment. Various general purpose systems can also be used together with the teachings based on this. According to the above description, it is obvious to construct the structure required for this type of system. In addition, the embodiment of the present invention is not directed to any specific programming language yet. It should be understood that various programming languages ​​can be utilized to realize the content of the present invention described herein, and the description made to specific languages ​​above is for disclosing the best mode of the present invention.

[0108] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0109] Similarly, it should be understood that in order to streamline the present invention and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of the present invention, various features of the embodiments of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, this method of disclosure should not be interpreted as reflecting an intention that the claimed invention requires more features than those expressly recited in each claim.

[0110] Those skilled in the art will appreciate that the modules in the devices in the embodiments may be adaptively changed and set in one or more devices different from the embodiments. The modules or units or components in the embodiments may be combined into one module or unit or component, and may be divided into multiple submodules or subunits or subcomponents. All features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed in this manner may be combined in any combination, except that at least some of such features and / or processes or units are mutually exclusive. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) may be replaced by an alternative feature that provides the same, equivalent or similar purpose.

[0111] It should be noted that the above embodiments illustrate the present invention rather than limit it, and that those skilled in the art may devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets shall not be construed as a limitation on the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "one" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention may be implemented by means of hardware comprising a number of different elements and by means of a suitably programmed computer. In a unit claim enumerating a number of devices, several of these devices may be embodied by the same hardware item. The use of the words first, second, and third, etc. does not indicate any order. These words may be interpreted as names. The steps in the above embodiments, unless otherwise specified, should not be understood as limitations on the order of execution.

Claims

1. A projector optical path test and adjustment method, characterized in that: In a control device used in a projector optical path test and adjustment device, the projector optical path test and adjustment device comprises a base, an XYZ three-axis sliding mechanism arranged on the base, a control device arranged on the base, a plurality of optical element fixing devices and a screen arranged in sequence on the XYZ three-axis sliding mechanism, a positioning device arranged on each optical element fixing device, and an imaging acquisition device for acquiring imaging information on the screen; wherein each optical element of the projector is fixed on the corresponding optical element fixing device in sequence according to the optical path sequence; the plurality of optical elements comprise an optical path light source, a focusing system, a rear Fresnel mirror, a heat-insulating glass, a liquid crystal panel, a front Fresnel mirror and a lens, and each of the optical element fixing devices is connected by a retractable and deformable optical channel structure; the method comprises: Controlling each optical element fixing device to move to its corresponding first position according to the simulated relative position between each optical element; After each optical element reaches the first position, controlling each optical element to work so as to project a projection image onto the screen; Controlling the imaging acquisition device to acquire the first imaging information on the screen, and acquiring the first imaging information; the first imaging information is used to reflect the clarity information, uniformity information, lumen information, and picture color temperature information of the first projected picture; Determine a first projection state according to the first imaging information and a preset projection state algorithm; the projection state algorithm includes at least one of a clarity algorithm, a uniformity algorithm, a lumen algorithm, and a picture color temperature algorithm; the first projection state includes at least one of current clarity, current uniformity, current lumen, and current picture color temperature; If the difference between the first projection state and the theoretical projection state is greater than a preset range, the target optical element fixture is controlled to move on the XYZ three-axis sliding mechanism according to a preset step length to a second position; the target optical element fixture is any one or more of all the optical element fixtures; the difference between the first projection state and the theoretical projection state is calculated based on at least one of the difference between the current clarity and the preset clarity, the difference between the current uniformity and the preset uniformity, the difference between the current lumens and the preset lumens, and the difference between the current picture color temperature and the preset picture color temperature; The second imaging information of the screen is obtained when the target optical element fixing device is in the second position, and the second projection state is calculated according to the second imaging information; if the difference between the second projection state and the theoretical projection state is greater than a preset range, the position of the target optical element is continuously adjusted until the difference is less than a preset range threshold, thereby obtaining the target position of each optical element.

2. The method according to claim 1, characterized in that Before the control device determines the corresponding relationship between the theoretical projection state and the relative position of the optical element and the actual parameter information of the current optical element according to the theoretical parameter range and the theoretical relative position of each optical element, the method includes: The actual parameter information and simulated relative position of each optical element input by the user are obtained; wherein the simulated relative position is the relative position of each optical element of the projector simulated according to the actual parameter information of each optical element by optical simulation software.

3. The method according to claim 1, characterized in that The imaging acquisition device includes an image acquisition module and an illumination acquisition module, and the first imaging information includes a first screen image and a first light illumination; the controlling the imaging acquisition device to acquire the first imaging information on the screen and acquiring the first imaging information includes: Acquire a first planar image formed on the screen by the image acquisition module; and, The first illuminance of the light irradiating the screen is acquired through an illuminance acquisition module.

4. The method according to claim 3, characterized in that The first projection state includes first lumen information, first uniformity information and first clarity information, and the preset projection state algorithm includes a lumen algorithm, a first uniformity algorithm and a clarity algorithm; and determining the first projection state according to the first imaging information and the preset projection state algorithm includes: The first lumen information is calculated according to the first illuminance and the lumen algorithm; the lumen algorithm is expressed as: , where ANSI is the lumen value, is the average illuminance, is the first illuminance of the nth point on the screen, and S is the projection area; Calculating the first uniformity information according to the lumen value of each area of ​​the nine-square grid of the first screen image on the screen and the first uniformity algorithm; The first uniformity algorithm is: ; Wherein, U1 is the first uniformity information, is the lumen value of the middle area of ​​the nine-square grid of the first screen image on the screen; are lumen values ​​of the four corner areas of the nine-square grid on the screen respectively; the first clarity information is calculated according to the first screen image and the clarity algorithm; wherein the clarity algorithm is: ;in, For clarity, is the grayscale value of the corresponding pixel point (x, y) in the first screen image.

5. The method according to any one of claims 1 to 4, characterized in that: If the difference between the first projection state and the theoretical projection state is greater than a preset range, the target optical element fixing device is controlled to move on the XYZ three-axis sliding mechanism according to a preset step length to move to a second position, comprising: Calculate the difference between the current definition and the preset definition, the difference between the current uniformity and the preset uniformity, the difference between the current lumens and the preset lumens, and the difference between the current picture color temperature and the preset picture color temperature; The difference between the current clarity and the preset clarity, the difference between the current uniformity and the preset uniformity, the difference between the current lumens and the preset lumens, and the difference between the current picture color temperature and the preset picture color temperature are input into a preset deep learning algorithm to obtain the relative adjustment positions of the target optical elements; according to the relative adjustment positions of the target optical elements, the target optical element fixing device is controlled to move on the XYZ three-axis sliding mechanism according to a preset step length to move to the second position.

6. The method according to any one of claims 1 to 4, characterized in that: The controlling target optical element fixing device moves on the XYZ three-axis sliding mechanism according to a preset step length to move to a second position, comprising: The relative distance between the target optical element fixture and the previous or next optical element fixture is slightly adjusted according to the preset step length, and the relative distances between other optical element fixtures are adjusted unchanged. At this time, the target optical element fixture moves to the second position; wherein, the positioning device corresponding to each optical element fixture sends a positioning signal in real time to determine that each optical element fixture moves to the corresponding position.

7. The method according to any one of claims 1 to 4, characterized in that: The projector optical path test and adjustment device further includes at least one heat sink, which is disposed on the base and is used to dissipate heat from the optical element; the method further includes: When the projector optical path test and adjustment device is working, the heat sink is controlled to work so as to dissipate heat for the optical element.

8. A projector optical path test and adjustment device, characterized in that: The projector optical path test and adjustment device comprises a base, an XYZ three-axis sliding mechanism arranged on the base, a control device arranged on the base, a plurality of optical element fixing devices and a screen arranged in sequence on the XYZ three-axis sliding mechanism, a positioning device arranged on each optical element fixing device, and an imaging acquisition device for acquiring imaging information on the screen; Among them, each optical element of the projector is fixed on the corresponding optical element fixing device in sequence according to the optical path sequence; the multiple optical elements include an optical path light source, a focusing system, a rear Fresnel mirror, a heat-insulating glass, a liquid crystal panel, a front Fresnel mirror and a lens, and each of the optical element fixing devices is connected by a retractable and deformable optical channel structure; An XYZ three-axis sliding mechanism is used to drive the plurality of optical element fixing devices to slide along the XYZ directions; A plurality of optical element fixing devices, used for fixing and installing various optical elements; A positioning device, used for positioning the optical element fixing device; a screen for presenting images emitted through the lens; An image acquisition device, used to acquire a screen image presented on the screen and send it to a control device; A control device, used for controlling each optical element fixing device to move to a first position corresponding to each other according to the simulated relative position between each optical element; The XYZ three-axis sliding mechanism is used to drive each optical element fixing device to move to its corresponding first position according to the simulated relative position sent by the control device; The control device is further used to control each optical element to work after each optical element reaches the first position, so as to project the projection image on the screen; control the imaging acquisition device to acquire first imaging information on the screen, and acquire the first imaging information, wherein the first imaging information is used to reflect the clarity information, uniformity information, lumen information, and picture color temperature information of the first projected picture; determine the first projection state according to the first imaging information and a preset projection state algorithm, wherein the projection state algorithm includes at least one of a clarity algorithm, a uniformity algorithm, a lumen algorithm, and a picture color temperature algorithm; the first projection state includes the current clarity , current uniformity, current lumens and current picture color temperature; if the difference between the first projection state and the theoretical projection state is greater than a preset range, the target optical element fixture is controlled to move on the XYZ three-axis sliding mechanism according to a preset step length to a second position, wherein the difference between the first projection state and the theoretical projection state is calculated based on at least one of the difference between the current clarity and the preset clarity, the difference between the current uniformity and the preset uniformity, the difference between the current lumens and the preset lumens, and the difference between the current picture color temperature and the preset picture color temperature; the target optical element fixture is any one or more of all the optical element fixtures; The XYZ three-axis sliding mechanism is also used to drive the target optical element to move to the corresponding second position according to the second position information sent by the control device; The control device is also used to obtain second imaging information of the screen when the target optical element fixing device is in the second position, and calculate the second projection state according to the second imaging information; if the difference between the second projection state and the theoretical projection state is greater than a preset range, the position of the target optical element is continuously adjusted until the difference is less than a preset range threshold, thereby obtaining the target position of each optical element.

9. The device according to claim 8, characterized in that The imaging acquisition device includes an image acquisition module and an illumination acquisition module, and the first imaging information includes a first screen image and a first light illumination; the control device is specifically used for: A first planar image formed on the screen is acquired through the image acquisition module; and a first illuminance of the light irradiated to the screen is acquired through the illuminance acquisition module.

10. The device according to claim 8 or 9, characterized in that The telescopic and deformable light channel structure comprises a transverse telescopic rod, a longitudinal telescopic rod, a vertical telescopic rod, a universal shaft and a shading cloth; two ends of one transverse telescopic rod are connected with one end of two vertical telescopic rods and one end of two longitudinal telescopic rods through a universal shaft; two ends of a plurality of shading cloths are respectively rolled on the transverse telescopic rod, the longitudinal telescopic rod and the vertical telescopic rod; The length of the shading cloth when it is unfolded to the maximum extent is greater than the maximum distance between two optical element fixing devices.

Images