Projector and projection method

Abstract

The present invention provides a projector, comprising a lens, a displacement adjustment unit, an imaging unit, a temperature sensing unit, a storage unit and a processing unit. The displacement adjustment unit is connected to the lens. The temperature sensing unit senses the current temperature. The storage unit stores a plurality of temperature ranges and a plurality of displacement changes corresponding to the plurality of temperature ranges. The processing unit receives a current image. The processing unit compares the current temperature with the plurality of temperature ranges to determine a current displacement change corresponding to the current temperature from the plurality of displacement changes. The processing unit performs at least one of the following steps according to the current displacement change: controlling the displacement adjustment unit to adjust the displacement of the lens; adjusting the displacement of the current image on the imaging unit; and performing an image adjustment procedure on the current image.

Description

Technical Field

[0001] The present invention relates to a projector and a projection method, and more particularly to a projector and a projection method capable of adjusting a projection image according to current temperature. Background Art

[0002] Recently, projectors are increasingly being used. In addition to being used in general office conference reports, projectors are also often used in various special discussions or academic courses because of their audio-visual playback capabilities. Generally speaking, a projector includes optical components such as a lens, a light source, and an optical-mechanical module. The light source is used to emit a light beam, which is processed by the optical-mechanical module and then projected through the lens to form an image. When the optical-mechanical module is in operation, a large amount of heat energy is generated, causing the optical components to expand and contract, which in turn causes thermal drift to the position and focal length of the projected image. Summary of the invention

[0003] One of the objectives of the present invention is to provide a projector and a projection method that can adjust the projected image according to the current temperature to solve the above-mentioned problem.

[0004] Based on the above purpose, the present invention provides a projector, which includes: a lens; an imaging unit, which is arranged relative to the lens; a temperature sensing unit, which senses the current temperature; a storage unit, which stores a plurality of temperature ranges and a plurality of displacement changes corresponding to the plurality of temperature ranges; and a processing unit, which is electrically connected to the imaging unit, the temperature sensing unit and the storage unit;

[0005] Wherein, the processing unit receives a current image, compares the current temperature with the multiple temperature ranges to determine the current displacement change corresponding to the current temperature from the multiple displacement changes, and performs at least one of the following steps according to the current displacement change: adjusts the displacement of the current image on the imaging unit, and executes an image adjustment procedure on the current image.

[0006] Preferably, it also includes: a displacement adjustment unit connected to the lens; and the processing unit, also electrically connected to the displacement adjustment unit; wherein the steps executed by the processing unit according to the current displacement change specifically include: the processing unit executes at least one of the following steps according to the current displacement change: controlling the displacement adjustment unit to adjust the displacement of the lens, adjusting the displacement of the current image on the imaging unit, and executing an image adjustment program on the current image.

[0007] Preferably, the displacement adjustment unit includes a horizontal displacement adjustment motor and / or a vertical displacement adjustment motor, and the processing unit controls the horizontal displacement adjustment motor to adjust the horizontal displacement of the lens and / or controls the vertical displacement adjustment motor to adjust the vertical displacement of the lens according to the current displacement variation.

[0008] Preferably, the image adjustment procedure includes at least one of the following steps: reducing the current image, enlarging the current image, and cropping the current image.

[0009] Preferably, before executing the image adjustment procedure on the current image, the processing unit determines whether the current image can be deleted; when the processing unit determines that the current image can be deleted, the processing unit first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when the processing unit determines that the current image cannot be deleted, the processing unit first reduces the current image according to the size of the projection plane, and then centers the current image relative to the projection plane.

[0010] Preferably, after determining the current displacement change corresponding to the current temperature, the processing unit determines whether the imaging unit has an unused area; when the processing unit determines that the imaging unit has an unused area, the processing unit adjusts the displacement of the current image on the imaging unit; when the processing unit determines that the imaging unit has no unused area, the processing unit determines whether the current image can be deleted; when the processing unit determines that the current image can be deleted, the processing unit first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when the processing unit determines that the current image cannot be deleted, the processing unit first reduces the current image according to the size of the projection plane, and then centers the current image relative to the projection plane.

[0011] Preferably, after determining the current displacement change corresponding to the current temperature, the processing unit determines whether the current image can be deleted; when the processing unit determines that the current image cannot be deleted, the processing unit adjusts the displacement of the current image on the imaging unit; when the processing unit determines that the current image can be deleted, the processing unit determines whether the proportion of the current image needs to be maintained; when the processing unit determines that the proportion of the current image needs to be maintained, the processing unit first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when the processing unit determines that the proportion of the current image does not need to be maintained, the processing unit directly crops the current image according to the size of the projection plane.

[0012] Preferably, after determining the current displacement change amount corresponding to the current temperature, the processing unit determines whether the displacement adjustment unit is adjustable; when the processing unit determines that the displacement adjustment unit is adjustable, the processing unit controls the displacement adjustment unit to adjust the displacement of the lens; when the processing unit determines that the displacement adjustment unit is not adjustable, the processing unit determines whether the imaging unit has an unused area; when the processing unit determines that the imaging unit has an unused area, the processing unit adjusts the displacement of the current image on the imaging unit; when the processing unit determines that the imaging unit has no unused area, the processing unit determines whether the current image is deletable When the processing unit determines that the current image cannot be deleted, the processing unit first reduces the current image according to the size of the projection plane, and then centers the current image relative to the projection plane; when the processing unit determines that the current image can be deleted, the processing unit determines whether the proportion of the current image needs to be maintained; when the processing unit determines that the proportion of the current image needs to be maintained, the processing unit first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when the processing unit determines that the proportion of the current image does not need to be maintained, the processing unit directly crops the current image according to the size of the projection plane.

[0013] Preferably, after determining the current displacement change amount corresponding to the current temperature, the processing unit determines whether the imaging unit has an unused area; when the processing unit determines that the imaging unit has an unused area, the processing unit adjusts the displacement of the current image on the imaging unit; when the processing unit determines that the imaging unit has no unused area, the processing unit determines whether the displacement adjustment unit is adjustable; when the processing unit determines that the displacement adjustment unit is adjustable, the processing unit controls the displacement adjustment unit to adjust the displacement of the lens; when the processing unit determines that the displacement adjustment unit is not adjustable, the processing unit determines whether the current image is deletable When the processing unit determines that the current image cannot be deleted, the processing unit first reduces the current image according to the size of the projection plane, and then centers the current image relative to the projection plane; when the processing unit determines that the current image can be deleted, the processing unit determines whether the proportion of the current image needs to be maintained; when the processing unit determines that the proportion of the current image needs to be maintained, the processing unit first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when the processing unit determines that the proportion of the current image does not need to be maintained, the processing unit directly crops the current image according to the size of the projection plane.

[0014] Preferably, it also includes a focus adjustment unit, which is connected to the lens, the processing unit is electrically connected to the focus adjustment unit, and the storage unit also stores multiple focus changes corresponding to the multiple temperature ranges. The processing unit compares the current temperature with the multiple temperature ranges to determine the current focus change corresponding to the current temperature from the multiple focus changes. The processing unit performs at least one of the following steps according to the current focus change: controlling the focus adjustment unit to adjust the focus of the lens, and performing a sharpening procedure on the current image.

[0015] Preferably, after determining the current focal length change corresponding to the current temperature, the processing unit determines whether the focal length adjustment unit is adjustable; when the processing unit determines that the focal length adjustment unit is adjustable, the processing unit controls the focal length adjustment unit to adjust the focal length of the lens; when the processing unit determines that the focal length adjustment unit is not adjustable, the processing unit executes the sharpening procedure on the current image.

[0016] Preferably, after determining the current focal length variation corresponding to the current temperature, the processing unit first performs the sharpening procedure on the current image, and then controls the focal length adjustment unit to adjust the focal length of the lens.

[0017] The present invention also proposes a projection method, which includes: providing multiple temperature ranges and multiple displacement changes corresponding to the multiple temperature ranges; receiving a current image and sensing a current temperature; comparing the current temperature with the multiple temperature ranges to determine a current displacement change corresponding to the current temperature from the multiple displacement changes; and performing at least one of the following steps according to the current displacement change: adjusting the displacement of the current image on the imaging unit, and performing an image adjustment procedure on the current image.

[0018] Preferably, at least one of the following steps is performed according to the current displacement variation: controlling the displacement adjustment unit to adjust the displacement of the lens, adjusting the displacement of the current image on the imaging unit, and performing an image adjustment procedure on the current image.

[0019] Preferably, the displacement adjustment unit includes a horizontal displacement adjustment motor and a vertical displacement adjustment motor, and the projection method controls the horizontal displacement adjustment motor to adjust the horizontal displacement of the lens and / or controls the vertical displacement adjustment motor to adjust the vertical displacement of the lens according to the current displacement variation.

[0020] Preferably, the image adjustment procedure includes at least one of the following steps: reducing the current image, enlarging the current image, and cropping the current image.

[0021] Preferably, before executing the image adjustment procedure on the current image, the projection method determines whether the current image can be deleted; when it is determined that the current image can be deleted, the projection method first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when it is determined that the current image cannot be deleted, the projection method first reduces the current image according to the size of the projection plane, and then centers the current image relative to the projection plane.

[0022] Preferably, after determining the current displacement change corresponding to the current temperature, the projection method determines whether the imaging unit has an unused area; when it is determined that the imaging unit has an unused area, the projection method adjusts the displacement of the current image on the imaging unit; when it is determined that the imaging unit has no unused area, the projection method determines whether the current image can be deleted; when it is determined that the current image can be deleted, the projection method first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when it is determined that the current image cannot be deleted, the projection method first reduces the current image according to the size of the projection plane, and then centers the current image relative to the projection plane.

[0023] Preferably, after determining the current displacement change corresponding to the current temperature, the projection method determines whether the current image can be deleted; when it is determined that the current image cannot be deleted, the projection method adjusts the displacement of the current image on the imaging unit; when it is determined that the current image can be deleted, the projection method determines whether the proportion of the current image needs to be maintained; when it is determined that the proportion of the current image needs to be maintained, the projection method first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when it is determined that the proportion of the current image does not need to be maintained, the projection method directly crops the current image according to the size of the projection plane.

[0024] Preferably, after determining the current displacement change corresponding to the current temperature, the projection method determines whether the displacement adjustment unit is adjustable; when it is determined that the displacement adjustment unit is adjustable, the projection method controls the displacement adjustment unit to adjust the displacement of the lens; when it is determined that the displacement adjustment unit is not adjustable, the projection method determines whether the imaging unit has an unused area; when it is determined that the imaging unit has an unused area, the projection method adjusts the displacement of the current image on the imaging unit; when it is determined that the imaging unit has no unused area, the projection method determines whether the current image can be deleted; when it is determined that the current image cannot be deleted, the projection method first reduces the current image according to the size of the projection plane, and then centers the current image relative to the projection plane; when it is determined that the current image can be deleted, the projection method determines whether the proportion of the current image needs to be maintained; when it is determined that the proportion of the current image needs to be maintained, the projection method first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when it is determined that the proportion of the current image does not need to be maintained, the projection method directly crops the current image according to the size of the projection plane.

[0025] Preferably, after determining the current displacement change corresponding to the current temperature, the projection method determines whether the imaging unit has an unused area; when it is determined that the imaging unit has an unused area, the projection method adjusts the displacement of the current image on the imaging unit; when it is determined that the imaging unit has no unused area, the projection method determines whether the displacement adjustment unit is adjustable; when it is determined that the displacement adjustment unit is adjustable, the projection method controls the displacement adjustment unit to adjust the displacement of the lens; when it is determined that the displacement adjustment unit is not adjustable, the projection method determines whether the current image can be deleted; when it is determined that the current image cannot be deleted, the projection method first reduces the current image according to the size of the projection plane, and then centers the current image relative to the projection plane; when it is determined that the current image can be deleted, the projection method determines whether the proportion of the current image needs to be maintained; when it is determined that the proportion of the current image needs to be maintained, the projection method first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when it is determined that the proportion of the current image does not need to be maintained, the projection method directly crops the current image according to the size of the projection plane.

[0026] Preferably, it also includes: providing multiple focal length changes corresponding to the multiple temperature ranges; comparing the current temperature with the multiple temperature ranges to determine the current focal length change corresponding to the current temperature from the multiple focal length changes; and performing at least one of the following steps based on the current focal length change: controlling the focal length adjustment unit to adjust the focal length of the lens, and performing a sharpening procedure on the current image.

[0027] Preferably, after determining the current focal length change corresponding to the current temperature, the projection method determines whether the focal length adjustment unit is adjustable; when it is determined that the focal length adjustment unit is adjustable, the projection method controls the focal length adjustment unit to adjust the focal length of the lens; when it is determined that the focal length adjustment unit is not adjustable, the projection method executes the sharpening procedure on the current image.

[0028] Preferably, after determining the current focal length variation corresponding to the current temperature, the projection method first performs the sharpening procedure on the current image, and then controls the focal length adjustment unit to adjust the focal length of the lens.

[0029] The present invention also provides a projector, which includes: a temperature sensing unit for sensing the current temperature; a storage unit for storing a plurality of temperature ranges and a plurality of focal length changes corresponding to the plurality of temperature ranges; and a processing unit electrically connected to the temperature sensing unit and the storage unit;

[0030] The processing unit receives a current image, compares the current temperature with the multiple temperature ranges to determine a current focal length change corresponding to the current temperature from the multiple focal length changes, and performs a sharpening procedure on the current image according to the current focal length change.

[0031] Preferably, it also includes: a lens; a focus adjustment unit connected to the lens; and the processing unit, which is also electrically connected to the focus adjustment unit; wherein the processing unit executes a sharpening procedure on the current image according to the current focus change amount, specifically including: the processing unit executes at least one of the following steps according to the current focus change amount: controls the focus adjustment unit to adjust the focus of the lens, and executes a sharpening procedure on the current image.

[0032] Preferably, after determining the current focal length change corresponding to the current temperature, the processing unit determines whether the focal length adjustment unit is adjustable; when the processing unit determines that the focal length adjustment unit is adjustable, the processing unit controls the focal length adjustment unit to adjust the focal length of the lens; when the processing unit determines that the focal length adjustment unit is not adjustable, the processing unit executes the sharpening procedure on the current image.

[0033] Preferably, after determining the current focal length variation corresponding to the current temperature, the processing unit first performs the sharpening procedure on the current image, and then controls the focal length adjustment unit to adjust the focal length of the lens.

[0034] Preferably, it also includes a lens, a displacement adjustment unit and an imaging unit, the displacement adjustment unit is connected to the lens, the imaging unit is arranged relative to the lens, the processing unit is electrically connected to the displacement adjustment unit and the imaging unit, the storage unit also stores a plurality of displacement changes corresponding to the plurality of temperature ranges, the processing unit compares the current temperature with the plurality of temperature ranges to determine a current displacement change corresponding to the current temperature from the plurality of displacement changes, and the processing unit performs at least one of the following steps according to the current displacement change: controls the displacement adjustment unit to adjust the displacement of the lens, adjusts the displacement of the current image on the imaging unit, and executes an image adjustment procedure on the current image.

[0035] Preferably, the displacement adjustment unit includes a horizontal displacement adjustment motor and a vertical displacement adjustment motor, and the processing unit controls the horizontal displacement adjustment motor to adjust the horizontal displacement of the lens and / or controls the vertical displacement adjustment motor to adjust the vertical displacement of the lens according to the current displacement variation.

[0036] Preferably, the image adjustment procedure includes at least one of the following steps: reducing the current image, enlarging the current image, and cropping the current image.

[0037] Preferably, before executing the image adjustment procedure on the current image, the processing unit determines whether the current image can be deleted; when the processing unit determines that the current image can be deleted, the processing unit first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when the processing unit determines that the current image cannot be deleted, the processing unit first reduces the current image according to the size of the projection plane, and then centers the current image relative to the projection plane.

[0038] Preferably, after determining the current displacement change corresponding to the current temperature, the processing unit determines whether the imaging unit has an unused area; when the processing unit determines that the imaging unit has an unused area, the processing unit adjusts the displacement of the current image on the imaging unit; when the processing unit determines that the imaging unit has no unused area, the processing unit determines whether the current image can be deleted; when the processing unit determines that the current image can be deleted, the processing unit first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when the processing unit determines that the current image cannot be deleted, the processing unit first reduces the current image according to the size of the projection plane, and then centers the current image relative to the projection plane.

[0039] Preferably, after determining the current displacement change corresponding to the current temperature, the processing unit determines whether the current image can be deleted; when the processing unit determines that the current image cannot be deleted, the processing unit adjusts the displacement of the current image on the imaging unit; when the processing unit determines that the current image can be deleted, the processing unit determines whether the proportion of the current image needs to be maintained; when the processing unit determines that the proportion of the current image needs to be maintained, the processing unit first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when the processing unit determines that the proportion of the current image does not need to be maintained, the processing unit directly crops the current image according to the size of the projection plane.

[0040] Preferably, after determining the current displacement change amount corresponding to the current temperature, the processing unit determines whether the displacement adjustment unit is adjustable; when the processing unit determines that the displacement adjustment unit is adjustable, the processing unit controls the displacement adjustment unit to adjust the displacement of the lens; when the processing unit determines that the displacement adjustment unit is not adjustable, the processing unit determines whether the imaging unit has an unused area; when the processing unit determines that the imaging unit has an unused area, the processing unit adjusts the displacement of the current image on the imaging unit; when the processing unit determines that the imaging unit has no unused area, the processing unit determines whether the current image is deletable When the processing unit determines that the current image cannot be deleted, the processing unit first reduces the current image according to the size of the projection plane, and then centers the current image relative to the projection plane; when the processing unit determines that the current image can be deleted, the processing unit determines whether the proportion of the current image needs to be maintained; when the processing unit determines that the proportion of the current image needs to be maintained, the processing unit first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when the processing unit determines that the proportion of the current image does not need to be maintained, the processing unit directly crops the current image according to the size of the projection plane.

[0041] Preferably, after determining the current displacement change amount corresponding to the current temperature, the processing unit determines whether the imaging unit has an unused area; when the processing unit determines that the imaging unit has an unused area, the processing unit adjusts the displacement of the current image on the imaging unit; when the processing unit determines that the imaging unit has no unused area, the processing unit determines whether the displacement adjustment unit is adjustable; when the processing unit determines that the displacement adjustment unit is adjustable, the processing unit controls the displacement adjustment unit to adjust the displacement of the lens; when the processing unit determines that the displacement adjustment unit is not adjustable, the processing unit determines whether the current image is deletable When the processing unit determines that the current image cannot be deleted, the processing unit first reduces the current image according to the size of the projection plane, and then centers the current image relative to the projection plane; when the processing unit determines that the current image can be deleted, the processing unit determines whether the proportion of the current image needs to be maintained; when the processing unit determines that the proportion of the current image needs to be maintained, the processing unit first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when the processing unit determines that the proportion of the current image does not need to be maintained, the processing unit directly crops the current image according to the size of the projection plane.

[0042] The present invention also proposes a projection method, which includes: providing multiple temperature ranges and multiple focal length changes corresponding to the multiple temperature ranges; receiving a current image and sensing a current temperature; comparing the current temperature with the multiple temperature ranges to determine a current focal length change corresponding to the current temperature from the multiple focal length changes; and performing a sharpening procedure on the current image according to the current focal length change.

[0043] Preferably, the steps performed according to the current focal length change specifically include: performing at least one of the following steps according to the current focal length change: controlling the focal length adjustment unit to adjust the focal length of the lens, and performing a sharpening procedure on the current image.

[0044] Preferably, after determining the current focal length change corresponding to the current temperature, the projection method determines whether the focal length adjustment unit is adjustable; when it is determined that the focal length adjustment unit is adjustable, the projection method controls the focal length adjustment unit to adjust the focal length of the lens; when it is determined that the focal length adjustment unit is not adjustable, the projection method executes the sharpening procedure on the current image.

[0045] Preferably, after determining the current focal length variation corresponding to the current temperature, the projection method first performs the sharpening procedure on the current image, and then controls the focal length adjustment unit to adjust the focal length of the lens.

[0046] Preferably, it also includes: providing multiple displacement changes corresponding to the multiple temperature ranges; comparing the current temperature with the multiple temperature ranges to determine the current displacement change corresponding to the current temperature from the multiple displacement changes; and performing at least one of the following steps according to the current displacement change: controlling the displacement adjustment unit to adjust the displacement of the lens, adjusting the displacement of the current image on the imaging unit, and executing an image adjustment program on the current image.

[0047] Preferably, the displacement adjustment unit includes a horizontal displacement adjustment motor and a vertical displacement adjustment motor, and the projection method controls the horizontal displacement adjustment motor to adjust the horizontal displacement of the lens and / or controls the vertical displacement adjustment motor to adjust the vertical displacement of the lens according to the current displacement variation.

[0048] Preferably, the image adjustment procedure includes at least one of the following steps: reducing the current image, enlarging the current image, and cropping the current image.

[0049] Preferably, before executing the image adjustment procedure on the current image, the projection method determines whether the current image can be deleted; when it is determined that the current image can be deleted, the projection method first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when it is determined that the current image cannot be deleted, the projection method first reduces the current image according to the size of the projection plane, and then centers the current image relative to the projection plane.

[0050] Preferably, after determining the current displacement change corresponding to the current temperature, the projection method determines whether the imaging unit has an unused area; when it is determined that the imaging unit has an unused area, the projection method adjusts the displacement of the current image on the imaging unit; when it is determined that the imaging unit has no unused area, the projection method determines whether the current image can be deleted; when it is determined that the current image can be deleted, the projection method first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when it is determined that the current image cannot be deleted, the projection method first reduces the current image according to the size of the projection plane, and then centers the current image relative to the projection plane.

[0051] Preferably, after determining the current displacement change corresponding to the current temperature, the projection method determines whether the current image can be deleted; when it is determined that the current image cannot be deleted, the projection method adjusts the displacement of the current image on the imaging unit; when it is determined that the current image can be deleted, the projection method determines whether the proportion of the current image needs to be maintained; when it is determined that the proportion of the current image needs to be maintained, the projection method first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when it is determined that the proportion of the current image does not need to be maintained, the projection method directly crops the current image according to the size of the projection plane.

[0052] Preferably, after determining the current displacement change corresponding to the current temperature, the projection method determines whether the displacement adjustment unit is adjustable; when it is determined that the displacement adjustment unit is adjustable, the projection method controls the displacement adjustment unit to adjust the displacement of the lens; when it is determined that the displacement adjustment unit is not adjustable, the projection method determines whether the imaging unit has an unused area; when it is determined that the imaging unit has an unused area, the projection method adjusts the displacement of the current image on the imaging unit; when it is determined that the imaging unit has no unused area, the projection method determines whether the current image can be deleted; when it is determined that the current image cannot be deleted, the projection method first reduces the current image according to the size of the projection plane, and then centers the current image relative to the projection plane; when it is determined that the current image can be deleted, the projection method determines whether the proportion of the current image needs to be maintained; when it is determined that the proportion of the current image needs to be maintained, the projection method first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when it is determined that the proportion of the current image does not need to be maintained, the projection method directly crops the current image according to the size of the projection plane.

[0053] Preferably, after determining the current displacement change corresponding to the current temperature, the projection method determines whether the imaging unit has an unused area; when it is determined that the imaging unit has an unused area, the projection method adjusts the displacement of the current image on the imaging unit; when it is determined that the imaging unit has no unused area, the projection method determines whether the displacement adjustment unit is adjustable; when it is determined that the displacement adjustment unit is adjustable, the projection method controls the displacement adjustment unit to adjust the displacement of the lens; when it is determined that the displacement adjustment unit is not adjustable, the projection method determines whether the current image can be deleted; when it is determined that the current image cannot be deleted, the projection method first reduces the current image according to the size of the projection plane, and then centers the current image relative to the projection plane; when it is determined that the current image can be deleted, the projection method determines whether the proportion of the current image needs to be maintained; when it is determined that the proportion of the current image needs to be maintained, the projection method first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when it is determined that the proportion of the current image does not need to be maintained, the projection method directly crops the current image according to the size of the projection plane.

[0054] Compared with the prior art, the present invention can selectively control the displacement adjustment unit (if any) to adjust the displacement of the lens according to the current temperature, adjust the displacement of the current image on the imaging unit, and / or perform an image adjustment procedure on the current image to prevent the projection image from being offset relative to the projection plane due to the influence of thermal drift. In addition, the present invention can selectively control the focus adjustment unit (if any) to adjust the focus of the lens according to the current temperature, and / or perform a sharpening procedure on the current image to prevent the projection image from becoming blurred (i.e., out of focus) due to the influence of thermal drift. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 FIG. 4 is a functional block diagram of a projector according to an embodiment of the present invention.

[0056] Figure 2 FIG. 4 is a flow chart of a projection method according to an embodiment of the present invention.

[0057] Figure 3 A schematic diagram showing the displacement of a projected image relative to the projection plane due to thermal drift.

[0058] Figure 4 Schematic diagram of the imaging unit.

[0059] Figure 5 This is a schematic diagram of first enlarging and then cropping the current image.

[0060] Figure 6 A schematic diagram of cropping the current image directly according to the size of the projection plane

[0061] Figure 7This is a schematic diagram of the current image being first reduced and then centered.

[0062] Figure 8 FIG. 4 is a flow chart of a projection method according to another embodiment of the present invention.

[0063] Fig. 9 FIG. 4 is a flow chart of a projection method according to another embodiment of the present invention.

[0064] Fig.10 FIG. 4 is a flow chart of a projection method according to another embodiment of the present invention.

[0065] Fig.11 FIG. 4 is a flow chart of a projection method according to another embodiment of the present invention.

[0066] Fig.12 FIG. 4 is a flow chart of a projection method according to another embodiment of the present invention.

[0067] Fig.13 A schematic diagram showing that a projected image becomes blurred due to thermal drift.

[0068] Fig.14 FIG. 4 is a flow chart of a projection method according to another embodiment of the present invention.

[0069] Fig.15 FIG. 4 is a flow chart of a projection method according to another embodiment of the present invention. DETAILED DESCRIPTION

[0070] In order to provide a further understanding of the purpose, structure, features, and functions of the present invention, the following detailed description is given in conjunction with the embodiments.

[0071] See also Figure 1 , Figure 1 FIG. 1 is a functional block diagram of a projector 1 according to an embodiment of the present invention. Figure 1 As shown, the projector 1 includes a lens 10, a displacement adjustment unit 12, an imaging unit 14, a temperature sensing unit 16, a storage unit 18, a processing unit 20, and a focus adjustment unit 22. Generally speaking, the projector 1 is also provided with necessary hardware and software components for operation, such as input / output ports, application programs, circuit boards, power supplies, communication modules, etc., depending on the actual application. In addition, the projector 1 is also provided with an illumination module for providing a light beam, which is reflected by the imaging unit 14 and then projected through the lens 10 to form an image. It should be noted that the imaging principle of the projector 1 is well known to people with ordinary skills and will not be repeated here.

[0072] The displacement adjustment unit 12 and the focal length adjustment unit 22 are both connected to the lens 10. In this embodiment, the displacement adjustment unit 12 may include a horizontal displacement adjustment motor 120 and a vertical displacement adjustment motor 122, wherein the horizontal displacement adjustment motor 120 is used to adjust the horizontal displacement of the lens 10, and the vertical displacement adjustment motor 122 is used to adjust the vertical displacement of the lens 10. In another embodiment, the displacement adjustment unit 12 may also include only one of the horizontal displacement adjustment motor 120 and the vertical displacement adjustment motor 122, depending on the actual application. In this embodiment, the focal length adjustment unit 22 may be a focal length adjustment motor, which is used to adjust the focal length of the lens 10.

[0073] The imaging unit 14 is disposed relative to the lens 10. In this embodiment, the imaging unit 14 may be a digital micromirror device (DMD). In practical applications, one or more imaging units 14 may be disposed in the projector 1. The processing unit 20 is electrically connected to the displacement adjustment unit 12, the imaging unit 14, the temperature sensing unit 16, the storage unit 18, and the focus adjustment unit 22. In this embodiment, the processing unit 20 may be a processor or controller having a signal processing function, the temperature sensing unit 16 may be a temperature sensor, and the storage unit 18 may be a memory, a hard disk, or other data storage devices.

[0074] See also Figure 2 and Figure 3 , Figure 2 is a flow chart of a projection method according to an embodiment of the present invention, Figure 3 Schematic diagram of the projection image PI being offset relative to the projection plane PP due to thermal drift. Figure 2 The projection method in the above is applicable to the above projector 1. When the projection image PI of the projector 1 is offset relative to the projection plane PP due to thermal drift (such as Figure 3 shown), Figure 2 The projection method in can be used to adjust the projection image PI. First, the present invention can provide multiple temperature ranges and multiple displacement changes corresponding to the multiple temperature ranges in the projector 1 (step S10), as shown in Table 1 below. The storage unit 18 is used to store the multiple temperature ranges shown in Table 1 and the multiple displacement changes corresponding to the multiple temperature ranges. In this embodiment, the displacement change may include a horizontal displacement change and a vertical displacement change. The present invention can first measure the displacement changes of the projection image PI of the projector 1 in the horizontal and vertical directions for different temperature ranges, and obtain a comparison table as shown in Table 1. Then, the present invention stores this comparison table in the storage unit 18. It should be noted that the numerical values ​​shown in Table 1 are only for illustrative purposes, and the present invention is not limited to this.

[0075] Table 1

[0076]

[0077] When the projector 1 operates, the processing unit 20 receives the current image, and the temperature sensing unit 16 senses the current temperature (step S11). It should be noted that the current image is projected by the projector 1 into Figure 3 the projected image PI in. Then, the processing unit 20 compares the current temperature with multiple temperature ranges (as shown in Table 1) to determine the current displacement change amount corresponding to the current temperature from multiple displacement change amounts (step S12). In this embodiment, the current displacement change amount may include a horizontal displacement change amount and a vertical displacement change amount. For example, when the current temperature is between T2 and T3 (or, T2 ≤ current temperature < T3, or T2 < current temperature < T3, or T2 < current temperature ≤ T3), the horizontal displacement change amount of the projected image PI is 500 units, and the vertical displacement change amount of the projected image PI is 200 units. Then, the processing unit 20 will perform at least one of the following steps according to the current displacement change amount: controlling the displacement adjustment unit 12 to adjust the displacement of the lens 10; adjusting the displacement of the current image on the imaging unit 14; and performing an image adjustment program on the current image. In other words, the processing unit 20 can selectively control the displacement adjustment unit 12 to adjust the displacement of the lens 10, adjust the displacement of the current image on the imaging unit 14, and / or perform an image adjustment program on the current image (step S13) according to the current temperature, so as to prevent the projected image PI from shifting relative to the projection plane PP due to the influence of thermal drift.

[0078] In this embodiment, the present invention can first establish a comparison table as shown in Table 2 below for the displacement adjustment unit 12 and the imaging unit 14. As shown in Table 2 below, when the horizontal displacement adjustment motor 120 runs 3 steps, 1 unit of the horizontal displacement change amount can be compensated; when the vertical displacement adjustment motor 122 runs 3 steps, 1 unit of the vertical displacement change amount can be compensated; when the horizontal displacement amount of the current image on the imaging unit 14 is 10 pixels, 1 unit of the horizontal displacement change amount can be compensated; and when the vertical displacement amount of the current image on the imaging unit 14 is 10 pixels, 1 unit of the vertical displacement change amount can be compensated. It should be noted that the values shown in Table 2 are only for illustrative purposes, and the present invention is not limited thereto.

[0079] Table 2

[0080]

[0081] The following describes how to control the displacement adjustment unit 12 to adjust the displacement of the lens 10 to compensate for the current displacement change amount of the projection image PI. As shown in Table 1, when the current temperature is between T2 and T3 (or, T2 ≤ current temperature < T3, or T2 < current temperature < T3, or T2 < current temperature ≤ T3), the horizontal displacement change amount of the projection image PI is 500 units, and the vertical displacement change amount of the projection image PI is 200 units. In other words, as Figure 3 shown, the projection image PI will extend 500 units to the right beyond the projection plane PP and 200 units upward beyond the projection plane PP. At this time, the processing unit 20 can control the horizontal displacement adjustment motor 120 to adjust the horizontal displacement of the lens 10 to the left according to the current displacement change amount and control the vertical displacement adjustment motor 122 to adjust the vertical displacement of the lens 10 downward. As shown in Table 2, when the horizontal displacement change amount of the projection image PI is 500 units to the right, the processing unit 20 can control the horizontal displacement adjustment motor 120 to operate 1500 steps to adjust the horizontal displacement of the lens 10 to the left, so as to displace the projection image PI 500 units to the left. Similarly, when the vertical displacement change amount of the projection image PI is 200 units upward, the processing unit 20 can control the vertical displacement adjustment motor 122 to operate 600 steps to adjust the vertical displacement of the lens 10 downward, so as to displace the projection image PI 200 units downward. Thereby, it is possible to prevent the projection image PI from shifting relative to the projection plane PP due to the influence of thermal drift.

[0082] It should be noted that when the displacement adjustment unit 12 cannot completely compensate for the current displacement change amount of the projection image PI due to mechanical limitations (for example, the horizontal displacement adjustment motor 120 can only operate 500 steps), the present invention can further adjust the displacement of the current image on the imaging unit 14 and / or perform an image adjustment program on the current image.

[0083] The following describes how to adjust the displacement of the current image on the imaging unit 14 to compensate for the current displacement change amount of the projection image PI. Please refer to Figure 4 , Figure 4 which is a schematic diagram of the imaging unit 14. When using the imaging unit 14, not all areas of the imaging unit 14 will be used for imaging. As Figure 4As shown, the area outside the imaging area of the imaging unit 14 can be defined as an unused area. This unused area can be used to compensate for the current displacement change of the projected image PI. As shown in Table 1, when the current temperature is between T2 and T3 (that is, T2 ≤ current temperature < T3, or T2 < current temperature < T3, or T2 < current temperature ≤ T3), the horizontal displacement change of the projected image PI is 500 units, and the vertical displacement change of the projected image PI is 200 units. At this time, the processing unit 20 can adjust the displacement of the current image on the imaging unit 14 according to the current displacement change. As shown in Table 2, when the horizontal displacement change of the projected image PI is 500 units to the right, the processing unit 20 can displace the current image 5000 pixels to the left on the imaging unit 14, so as to displace the projected image PI 500 units to the left. Similarly, when the vertical displacement change of the projected image PI is 200 units upward, the processing unit 20 can displace the current image 2000 pixels downward on the imaging unit 14, so as to displace the projected image PI 200 units downward. Thereby, it is possible to prevent the projected image PI from shifting relative to the projection plane PP due to the influence of thermal drift.

[0084] It should be noted that when the unused area of the imaging unit 14 cannot fully compensate for the current displacement change of the projected image PI (for example, the current image can only be displaced 3000 pixels to the left on the imaging unit 14), the present invention can further control the displacement adjustment unit 12 to adjust the displacement of the lens 10 and / or perform an image adjustment program on the current image.

[0085] The following describes how to perform an image adjustment program on the current image to compensate for the current displacement change of the projected image PI. In this embodiment, the image adjustment program may include at least one of the following steps: reducing the current image; enlarging the current image; and cropping the current image.

[0086] Please refer to Figures 5 to 7 , Figure 5 is a schematic diagram of first enlarging and then cropping the current image CI, Figure 6 is a schematic diagram of directly cropping the current image CI according to the size of the projection plane PP, Figure 7 is a schematic diagram of first reducing and then centering the current image CI. It should be noted that Figures 5 to 7 the current image CI in Figure 3 is projected by the projector 1 into the Figure 5Of course, the processing unit 20 can also directly crop the current image CI according to the size of the projection plane PP, such as Figure 6 When the processing unit 20 determines that the current image cannot be deleted, the processing unit 20 may first reduce the current image according to the size of the projection plane PP, and then center the current image relative to the projection plane PP, as shown in FIG. Figure 7 It should be noted that the current image CI can be enlarged or reduced in equal proportions, but is not limited thereto.

[0087] In this way, the projection image PI can be prevented from being offset relative to the projection plane PP due to thermal drift. It should be noted that the size of the projection plane PP can be set by the user or automatically detected by the system. In addition, whether the current image CI can be deleted can be set by the user or by default by the system.

[0088] See also Figure 8 , Figure 8 FIG. 1 is a flow chart of a projection method according to another embodiment of the present invention. In another embodiment, the present invention can be performed by Figure 8 The projection method in the image determines the way to adjust the projection image PI. Figure 8 As shown, after determining the current displacement change corresponding to the current temperature (step S20), the processing unit 20 may first determine whether the imaging unit 14 has an unused area (step S21). When the processing unit 20 determines that the imaging unit 14 has an unused area, the processing unit 20 may adjust the displacement of the current image on the imaging unit 14 according to the above method (step S22). When the processing unit 20 determines that the imaging unit 14 has no unused area, the processing unit 20 may further determine whether the current image can be deleted (step S23). When the processing unit 20 determines that the current image CI can be deleted, the processing unit 20 may first enlarge the current image CI according to the size of the projection plane PP, and then crop the current image CI according to the size of the projection plane PP (step S24). When the processing unit 20 determines that the current image CI cannot be deleted, the processing unit 20 may first reduce the current image CI according to the size of the projection plane PP, and then center the current image CI relative to the projection plane PP (step S25).

[0089] See also Fig. 9 , Fig. 9 FIG. 1 is a flow chart of a projection method according to another embodiment of the present invention. In another embodiment, the present invention can be performed by Fig. 9 The projection method in the image determines the way to adjust the projection image PI. Fig. 9As shown, after determining the current displacement change corresponding to the current temperature (step S30), the processing unit 20 may first determine whether the current image CI can be deleted (step S31). When the processing unit 20 determines that the current image CI cannot be deleted, the processing unit 20 may adjust the displacement of the current image CI on the imaging unit 14 (step S32). When the processing unit 20 determines that the current image CI can be deleted, the processing unit 20 may further determine whether the proportion of the current image CI needs to be maintained (step S33). When the processing unit 20 determines that the proportion of the current image CI needs to be maintained, the processing unit 20 may first enlarge the current image CI according to the size of the projection plane PP, and then crop the current image CI according to the size of the projection plane PP (step S34). When the processing unit 20 determines that the proportion of the current image CI does not need to be maintained, the processing unit 20 may directly crop the current image CI according to the size of the projection plane PP (step S35). It should be noted that whether the proportion of the current image CI needs to be maintained can be set by the user or by system default.

[0090] When the projector 1 does not include the displacement adjustment unit 12, the projector 1 can be Figure 8 or Fig. 9 Of course, the projector 1 including the displacement adjustment unit 12 can also be used to adjust the projection image PI. Figure 8 or Fig. 9 The projection image PI is adjusted according to the projection method in.

[0091] See also Fig.10 , Fig.10 FIG. 1 is a flow chart of a projection method according to another embodiment of the present invention. In another embodiment, the present invention can be performed by Fig.10 The projection method in the image determines the way to adjust the projection image PI. Fig.10As shown, after determining the current displacement change corresponding to the current temperature (step S40), the processing unit 20 may first determine whether the displacement adjustment unit 12 is adjustable (step S41). When the processing unit 20 determines that the displacement adjustment unit 12 is adjustable, the processing unit 20 may control the displacement adjustment unit 12 to adjust the displacement of the lens 10 according to the above method (step S42). When the processing unit 20 determines that the displacement adjustment unit 12 is not adjustable, the processing unit 20 may further determine whether the imaging unit 14 has an unused area (step S43). When the processing unit 20 determines that the imaging unit 14 has an unused area, the processing unit 20 may adjust the displacement of the current image CI on the imaging unit 14 (step S44). When the processing unit 20 determines that the imaging unit 14 has no unused area, the processing unit 20 may further determine whether the current image CI can be deleted (step S45). When the processing unit 20 determines that the current image CI cannot be deleted, the processing unit 20 may first reduce the current image CI according to the size of the projection plane PP, and then center the current image CI relative to the projection plane PP (step S46). When the processing unit 20 determines that the current image CI can be deleted, the processing unit 20 can further determine whether the ratio of the current image CI needs to be maintained (step S47). When the processing unit 20 determines that the ratio of the current image CI needs to be maintained, the processing unit 20 can first enlarge the current image CI according to the size of the projection plane PP, and then cut the current image CI according to the size of the projection plane PP (step S48). When the processing unit 20 determines that the ratio of the current image CI does not need to be maintained, the processing unit 20 can directly cut the current image CI according to the size of the projection plane PP (step S49).

[0092] See also Fig.11 , Fig.11 FIG. 1 is a flow chart of a projection method according to another embodiment of the present invention. In another embodiment, the present invention can be performed by Fig.11 The projection method in the image determines the way to adjust the projection image PI. Fig.11As shown, after determining the current displacement change corresponding to the current temperature (step S50), the processing unit 20 may first determine whether the imaging unit 14 has an unused area (step S51). When the processing unit 20 determines that the imaging unit 14 has an unused area, the processing unit 20 may adjust the displacement of the current image CI on the imaging unit 14 (step S52). When the processing unit 20 determines that the imaging unit 14 has no unused area, the processing unit 20 may further determine whether the displacement adjustment unit 12 is adjustable (step S53). When the processing unit 20 determines that the displacement adjustment unit 12 is adjustable, the processing unit 20 may control the displacement adjustment unit 12 to adjust the displacement of the lens 10 according to the above method (step S54). When the processing unit 20 determines that the displacement adjustment unit 12 is not adjustable, the processing unit 20 may further determine whether the current image CI can be deleted (step S55). When the processing unit 20 determines that the current image CI is not deletable, the processing unit 20 may first reduce the current image CI according to the size of the projection plane PP, and then center the current image CI relative to the projection plane PP (step S56). When the processing unit 20 determines that the current image CI can be deleted, the processing unit 20 can further determine whether the ratio of the current image CI needs to be maintained (step S57). When the processing unit 20 determines that the ratio of the current image CI needs to be maintained, the processing unit 20 can first enlarge the current image CI according to the size of the projection plane PP, and then cut the current image CI according to the size of the projection plane PP (step S58). When the processing unit 20 determines that the ratio of the current image CI does not need to be maintained, the processing unit 20 can directly cut the current image CI according to the size of the projection plane PP (step S59).

[0093] See also Fig.12 and Fig.13 , Fig.12 is a flow chart of a projection method according to another embodiment of the present invention, Fig.13 FIG. 1 is a schematic diagram showing that the projection image PI' becomes blurred due to the influence of thermal drift. Fig.12 The projection method in the above is also applicable to the above projector 1. When the projection image PI' of the projector 1 becomes blurred (ie, out of focus) due to the influence of thermal drift (eg Fig.13 shown), Fig.12The projection method in [the relevant context] can be used to adjust the projection image PI'. First, the present invention can provide multiple temperature ranges in the projector 1 and multiple focal length change amounts corresponding to the multiple temperature ranges (step S60), as shown in Table 3 below. The storage unit 18 is used to store the multiple temperature ranges shown in Table 3 and the multiple focal length change amounts corresponding to the multiple temperature ranges. In this embodiment, the focal length change amount can be represented by the width change amount of a straight line of one pixel in the image. The present invention can first measure the width change amount of a straight line of one pixel in the projection image PI' of the projector 1 for different temperature ranges to obtain a comparison table as shown in Table 3. Then, the present invention stores this comparison table in the storage unit 18. It should be noted that the values shown in Table 3 are only for illustrative purposes, and the present invention is not limited thereto.

[0094] Table 3

[0095]

[0096] When the projector 1 operates, the processing unit 20 receives the current image, and the temperature sensing unit 16 senses the current temperature (step S61). It should be noted that the current image is projected by the projector 1 as Fig.13 the projection image PI' in [the relevant context]. Then, the processing unit 20 compares the current temperature with the multiple temperature ranges (as shown in Table 3) to determine the current focal length change amount corresponding to the current temperature from the multiple focal length change amounts (step S62). For example, when the current temperature is between T2 and T3 (or, T2 ≤ current temperature < T3, or T2 < current temperature < T3, or T2 < current temperature ≤ T3), the current focal length change amount of the projection image PI' is 5. Then, the processing unit 20 will perform at least one of the following steps according to the current focal length change amount: controlling the focal length adjustment unit 22 to adjust the focal length of the lens 10; and performing a sharpening procedure on the current image. In other words, the processing unit 20 can selectively control the focal length adjustment unit 22 to adjust the focal length of the lens 10 according to the current temperature, and / or perform a sharpening procedure on the current image (step S63) to prevent the projection image PI' from becoming blurred (i.e., out of focus) due to the influence of thermal drift.

[0097] In this embodiment, the present invention can first establish a comparison table as shown in Table 4 below for the focal length adjustment unit 22 and the sharpening degree. As shown in Table 4 below, when the focal length adjustment unit 22 operates 5 steps, 1 unit of the focal length change amount can be compensated; and when the sharpening degree is 6, 1 unit of the focal length change amount can be compensated. It should be noted that the values shown in Table 4 are only for illustrative purposes, and the present invention is not limited thereto. In addition, the sharpening procedure of the present invention can be implemented by an Unsharpen Mask or other sharpening methods. Furthermore, the principle of action and setting of the sharpening degree in the sharpening procedure are well-known to those skilled in the art and will not be elaborated here.

[0098] Table 4

[0099] 1 unit of focal length change Number of operation steps of the focus adjustment unit 22 5 Sharpness 6

[0100] As shown in Table 3, when the current temperature is between T2 and T3 (that is, T2 ≤ current temperature < T3, or T2 < current temperature < T3, or T2 < current temperature ≤ T3), the current focal length change of the projection image PI' is 5. At this time, as shown in Table 4, the processing unit 20 can control the focal length adjustment unit 22 to operate for 25 steps to adjust the focal length of the lens 10. In addition, the processing unit 20 can also perform a sharpening process on the current image according to the sharpening degree in Table 4. Thereby, it is possible to prevent the projection image PI' from becoming blurred (that is, out of focus) due to the influence of thermal drift.

[0101] Please refer to Fig.14 , Fig.14 , which is a flowchart of a projection method according to another embodiment of the present invention. In another embodiment, the present invention can determine the way to adjust the projection image PI' by the projection method in Fig.14 . As shown in Fig.14 , after determining the current focal length change corresponding to the current temperature (step S70), the processing unit 20 can first determine whether the focal length adjustment unit 22 can be adjusted (step S71). When the processing unit 20 determines that the focal length adjustment unit 22 can be adjusted, the processing unit 20 can control the focal length adjustment unit 22 to adjust the focal length of the lens 10 (step S72). When the processing unit 20 determines that the focal length adjustment unit 22 cannot be adjusted, the processing unit 20 can perform a sharpening process on the current image (step S73).

[0102] Please refer to Fig.15 , Fig.15 , which is a flowchart of a projection method according to another embodiment of the present invention. As shown in Fig.15 , in another embodiment, after determining the current focal length change corresponding to the current temperature (step S80), the processing unit 20 can first perform a sharpening process on the current image (step S81), and then control the focal length adjustment unit 22 to adjust the focal length of the lens 10 (step S82).

[0103] It should be noted that when the projector 1 does not include the focal length adjustment unit 22, the projector 1 can directly perform a sharpening process on the current image.

[0104] In addition, each part or function in the control logic of the projection method of the present invention can be implemented through a combination of software and hardware.

[0105] In summary, the present invention can selectively control the displacement adjustment unit (if any) to adjust the displacement of the lens according to the current temperature, adjust the displacement of the current image on the imaging unit, and / or perform an image adjustment procedure on the current image to prevent the projection image from being offset relative to the projection plane due to the influence of thermal drift. In addition, the present invention can selectively control the focus adjustment unit (if any) to adjust the focus of the lens according to the current temperature, and / or perform a sharpening procedure on the current image to prevent the projection image from becoming blurred (i.e., out of focus) due to the influence of thermal drift.

[0106] The present invention has been described by the above-mentioned relevant embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, changes and modifications made without departing from the spirit and scope of the present invention are all within the scope of patent protection of the present invention.

Claims

1. A projector, characterized in that: Include: Lens; An imaging unit is arranged relative to the lens; A temperature sensing unit, sensing the current temperature; A storage unit storing a plurality of temperature ranges and a plurality of displacement changes corresponding to the plurality of temperature ranges; and a processing unit electrically connected to the imaging unit, the temperature sensing unit and the storage unit; wherein the displacement variation is a horizontal displacement variation and / or a vertical displacement variation; The processing unit receives a current image, compares the current temperature with the multiple temperature ranges to determine a current displacement change corresponding to the current temperature from the multiple displacement changes, and performs at least one of the following steps according to the current displacement change: adjusting the displacement of the current image on the imaging unit; and An image adjustment procedure is performed on the current image.

2. The projector according to claim 1, wherein: It also includes: a displacement adjustment unit connected to the lens; and the processing unit, which is also electrically connected to the displacement adjustment unit; The step performed by the processing unit according to the current displacement change specifically includes: the processing unit performs at least one of the following steps according to the current displacement change: Controlling the displacement adjustment unit to adjust the displacement of the lens; adjusting the displacement of the current image on the imaging unit; and An image adjustment procedure is performed on the current image.

3. The projector according to claim 2, characterized in that The displacement adjustment unit includes a horizontal displacement adjustment motor and / or a vertical displacement adjustment motor. The processing unit controls the horizontal displacement adjustment motor to adjust the horizontal displacement of the lens and / or controls the vertical displacement adjustment motor to adjust the vertical displacement of the lens according to the current displacement variation.

4. The projector according to claim 1, wherein: The image adjustment procedure includes at least one of the following steps: reducing the current image; enlarging the current image; and cropping the current image.

5. The projector according to claim 4, characterized in that Before executing the image adjustment procedure on the current image, the processing unit determines whether the current image can be deleted; when the processing unit determines that the current image is deletable, the processing unit first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when the processing unit determines that the current image is not deletable, the processing unit first reduces the current image according to the size of the projection plane, and then centers the current image relative to the projection plane.

6. The projector according to claim 1, wherein: After determining the current displacement change corresponding to the current temperature, the processing unit determines whether the imaging unit has an unused area; when the processing unit determines that the imaging unit has an unused area, the processing unit adjusts the displacement of the current image on the imaging unit; when the processing unit determines that the imaging unit has no unused area, the processing unit determines whether the current image can be deleted; when the processing unit determines that the current image is deletable, the processing unit first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when the processing unit determines that the current image is not deletable, the processing unit first reduces the current image according to the size of the projection plane, and then centers the current image relative to the projection plane.

7. The projector according to claim 1, wherein: After determining the current displacement change corresponding to the current temperature, the processing unit determines whether the current image can be deleted; when the processing unit determines that the current image cannot be deleted, the processing unit adjusts the displacement of the current image on the imaging unit; when the processing unit determines that the current image can be deleted, the processing unit determines whether the proportion of the current image needs to be maintained; when the processing unit determines that the proportion of the current image needs to be maintained, the processing unit first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when the processing unit determines that the proportion of the current image does not need to be maintained, the processing unit directly crops the current image according to the size of the projection plane.

8. The projector according to claim 2, characterized in that: After determining the current displacement change corresponding to the current temperature, the processing unit determines whether the displacement adjustment unit is adjustable; when the processing unit determines that the displacement adjustment unit is adjustable, the processing unit controls the displacement adjustment unit to adjust the displacement of the lens; when the processing unit determines that the displacement adjustment unit is not adjustable, the processing unit determines whether the imaging unit has an unused area; when the processing unit determines that the imaging unit has an unused area, the processing unit adjusts the displacement of the current image on the imaging unit; when the processing unit determines that the imaging unit has no unused area, the processing unit determines whether the current image can be deleted; When the processing unit determines that the current image is not deletable, the processing unit first reduces the current image according to the size of the projection plane, and then centers the current image relative to the projection plane; when the processing unit determines that the current image is deletable, the processing unit determines whether the proportion of the current image needs to be maintained; when the processing unit determines that the proportion of the current image needs to be maintained, the processing unit first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when the processing unit determines that the proportion of the current image does not need to be maintained, the processing unit directly crops the current image according to the size of the projection plane.

9. The projector according to claim 2, wherein: After determining the current displacement change amount corresponding to the current temperature, the processing unit determines whether the imaging unit has an unused area; when the processing unit determines that the imaging unit has an unused area, the processing unit adjusts the displacement of the current image on the imaging unit; when the processing unit determines that the imaging unit has no unused area, the processing unit determines whether the displacement adjustment unit is adjustable; when the processing unit determines that the displacement adjustment unit is adjustable, the processing unit controls the displacement adjustment unit to adjust the displacement of the lens; when the processing unit determines that the displacement adjustment unit is not adjustable, the processing unit determines whether the current image can be deleted; When the processing unit determines that the current image is not deletable, the processing unit first reduces the current image according to the size of the projection plane, and then centers the current image relative to the projection plane; when the processing unit determines that the current image is deletable, the processing unit determines whether the proportion of the current image needs to be maintained; when the processing unit determines that the proportion of the current image needs to be maintained, the processing unit first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when the processing unit determines that the proportion of the current image does not need to be maintained, the processing unit directly crops the current image according to the size of the projection plane.

10. The projector according to claim 1, wherein: The invention also includes a focal length adjustment unit, the focal length adjustment unit is connected to the lens, the processing unit is electrically connected to the focal length adjustment unit, the storage unit further stores a plurality of focal length changes corresponding to the plurality of temperature ranges, the processing unit compares the current temperature with the plurality of temperature ranges to determine a current focal length change corresponding to the current temperature from the plurality of focal length changes, and the processing unit performs at least one of the following steps according to the current focal length change: Controlling the focal length adjustment unit to adjust the focal length of the lens; and Perform a sharpening process on the current image.

11. The projector according to claim 10, characterized in that After determining the current focal length change corresponding to the current temperature, the processing unit determines whether the focal length adjustment unit is adjustable; when the processing unit determines that the focal length adjustment unit is adjustable, the processing unit controls the focal length adjustment unit to adjust the focal length of the lens; when the processing unit determines that the focal length adjustment unit is not adjustable, the processing unit executes the sharpening procedure on the current image.

12. The projector according to claim 10, wherein: After determining the current focal length variation corresponding to the current temperature, the processing unit first executes the sharpening procedure on the current image, and then controls the focal length adjustment unit to adjust the focal length of the lens.

13. A projection method, characterized in that: Include: Providing multiple temperature ranges and multiple displacement changes corresponding to the multiple temperature ranges, wherein the displacement changes are horizontal displacement changes and / or vertical displacement changes; Receive the current image and sense the current temperature; comparing the current temperature with the plurality of temperature ranges to determine a current displacement change corresponding to the current temperature from the plurality of displacement changes; and Perform at least one of the following steps according to the current displacement change: adjusting the displacement of the current image on the imaging unit; and An image adjustment procedure is performed on the current image.

14. The projection method according to claim 13, characterized in that: Include: Perform at least one of the following steps according to the current displacement change: Controlling the displacement adjustment unit to adjust the displacement of the lens; Adjusting the displacement of the current image on the imaging unit; and An image adjustment procedure is performed on the current image.

15. The projection method according to claim 14, characterized in that: The displacement adjustment unit includes a horizontal displacement adjustment motor and a vertical displacement adjustment motor. The projection method controls the horizontal displacement adjustment motor to adjust the horizontal displacement of the lens and / or controls the vertical displacement adjustment motor to adjust the vertical displacement of the lens according to the current displacement variation.

16. The projection method according to claim 13, characterized in that: The image adjustment procedure includes at least one of the following steps: reducing the current image; enlarging the current image; and cropping the current image.

17. The projection method according to claim 16, characterized in that: Before executing the image adjustment procedure on the current image, the projection method determines whether the current image can be deleted; when it is determined that the current image is deletable, the projection method first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when it is determined that the current image is not deletable, the projection method first reduces the current image according to the size of the projection plane, and then centers the current image relative to the projection plane.

18. The projection method according to claim 13, characterized in that: After determining the current displacement change corresponding to the current temperature, the projection method determines whether the imaging unit has an unused area; when it is determined that the imaging unit has an unused area, the projection method adjusts the displacement of the current image on the imaging unit; when it is determined that the imaging unit has no unused area, the projection method determines whether the current image can be deleted; when it is determined that the current image is deletable, the projection method first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when it is determined that the current image is not deletable, the projection method first reduces the current image according to the size of the projection plane, and then centers the current image relative to the projection plane.

19. The projection method according to claim 13, characterized in that: After determining the current displacement change corresponding to the current temperature, the projection method determines whether the current image can be deleted; when it is determined that the current image cannot be deleted, the projection method adjusts the displacement of the current image on the imaging unit; when it is determined that the current image can be deleted, the projection method determines whether the proportion of the current image needs to be maintained; when it is determined that the proportion of the current image needs to be maintained, the projection method first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when it is determined that the proportion of the current image does not need to be maintained, the projection method directly crops the current image according to the size of the projection plane.

20. The projection method according to claim 14, characterized in that: After determining the current displacement change corresponding to the current temperature, the projection method determines whether the displacement adjustment unit is adjustable; when it is determined that the displacement adjustment unit is adjustable, the projection method controls the displacement adjustment unit to adjust the displacement of the lens; when it is determined that the displacement adjustment unit is not adjustable, the projection method determines whether the imaging unit has an unused area; when it is determined that the imaging unit has an unused area, the projection method adjusts the displacement of the current image on the imaging unit; when it is determined that the imaging unit has no unused area, the projection method determines whether the current image can be deleted; when it is determined that the current image cannot be deleted, the projection method first reduces the current image according to the size of the projection plane, and then centers the current image relative to the projection plane; when it is determined that the current image is deletable, the projection method determines whether the proportion of the current image needs to be maintained; when it is determined that the proportion of the current image needs to be maintained, the projection method first enlarges the current image according to the size of the projection plane, and then cuts the current image according to the size of the projection plane; when it is determined that the proportion of the current image does not need to be maintained, the projection method directly cuts the current image according to the size of the projection plane.

21. The projection method according to claim 14, characterized in that: After determining the current displacement change corresponding to the current temperature, the projection method determines whether the imaging unit has an unused area; when it is determined that the imaging unit has an unused area, the projection method adjusts the displacement of the current image on the imaging unit; when it is determined that the imaging unit has no unused area, the projection method determines whether the displacement adjustment unit is adjustable; when it is determined that the displacement adjustment unit is adjustable, the projection method controls the displacement adjustment unit to adjust the displacement of the lens; when it is determined that the displacement adjustment unit is not adjustable, the projection method determines whether the current image can be deleted; when it is determined that the current image cannot be deleted, the projection method first reduces the current image according to the size of the projection plane, and then centers the current image relative to the projection plane; when it is determined that the current image can be deleted, the projection method determines whether the ratio of the current image needs to be maintained; when it is determined that the ratio of the current image needs to be maintained, the projection method first enlarges the current image according to the size of the projection plane, and then cuts the current image according to the size of the projection plane; when it is determined that the ratio of the current image does not need to be maintained, the projection method directly cuts the current image according to the size of the projection plane.

22. The projection method according to claim 13, characterized in that: Also includes: Providing multiple focal length changes corresponding to the multiple temperature ranges; comparing the current temperature with the plurality of temperature ranges to determine a current focal length variation corresponding to the current temperature from the plurality of focal length variations; and Perform at least one of the following steps according to the current focal length change: Controlling the focus adjustment unit to adjust the focus of the lens; and Perform a sharpening process on the current image.

23. The projection method according to claim 22, characterized in that: After determining the current focal length change corresponding to the current temperature, the projection method determines whether the focal length adjustment unit is adjustable; when it is determined that the focal length adjustment unit is adjustable, the projection method controls the focal length adjustment unit to adjust the focal length of the lens; when it is determined that the focal length adjustment unit is not adjustable, the projection method executes the sharpening procedure on the current image.

24. The projection method according to claim 22, characterized in that: After determining the current focal length variation corresponding to the current temperature, the projection method first executes the sharpening procedure on the current image, and then controls the focal length adjustment unit to adjust the focal length of the lens.

25. A projector, characterized in that: Include: Lens; A focus adjustment unit connected to the lens; A temperature sensing unit, sensing the current temperature; A storage unit storing a plurality of temperature ranges and a plurality of focal length changes corresponding to the plurality of temperature ranges; as well as A processing unit electrically connected to the temperature sensing unit, the storage unit and the focal length adjustment unit; The processing unit receives a current image, compares the current temperature with the multiple temperature ranges, and determines a current focal length variation corresponding to the current temperature from the multiple focal length variation amounts. The processing unit performs a sharpening procedure on the current image according to the current focal length variation amount, specifically including: After determining the current focal length change corresponding to the current temperature, the processing unit determines whether the focal length adjustment unit is adjustable; when the processing unit determines that the focal length adjustment unit is adjustable, the processing unit controls the focal length adjustment unit to adjust the focal length of the lens; when the processing unit determines that the focal length adjustment unit is not adjustable, the processing unit executes the sharpening procedure on the current image.

26. The projector according to claim 25, characterized in that The invention also comprises a lens, a displacement adjustment unit and an imaging unit, wherein the displacement adjustment unit is connected to the lens, the imaging unit is arranged relative to the lens, the processing unit is electrically connected to the displacement adjustment unit and the imaging unit, the storage unit further stores a plurality of displacement changes corresponding to the plurality of temperature ranges, wherein the displacement changes are horizontal displacement changes and / or vertical displacement changes; the processing unit compares the current temperature with the plurality of temperature ranges to determine a current displacement change corresponding to the current temperature from the plurality of displacement changes, and the processing unit performs at least one of the following steps according to the current displacement change: Controlling the displacement adjustment unit to adjust the displacement of the lens; adjusting the displacement of the current image on the imaging unit; and An image adjustment procedure is performed on the current image.

27. The projector according to claim 26, characterized in that The displacement adjustment unit includes a horizontal displacement adjustment motor and a vertical displacement adjustment motor. The processing unit controls the horizontal displacement adjustment motor to adjust the horizontal displacement of the lens and / or controls the vertical displacement adjustment motor to adjust the vertical displacement of the lens according to the current displacement variation.

28. The projector according to claim 26, wherein: The image adjustment procedure includes at least one of the following steps: reducing the current image; enlarging the current image; and cropping the current image.

29. The projector according to claim 28, characterized in that Before executing the image adjustment procedure on the current image, the processing unit determines whether the current image can be deleted; when the processing unit determines that the current image is deletable, the processing unit first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when the processing unit determines that the current image is not deletable, the processing unit first reduces the current image according to the size of the projection plane, and then centers the current image relative to the projection plane.

30. The projector according to claim 26, wherein: After determining the current displacement change corresponding to the current temperature, the processing unit determines whether the imaging unit has an unused area; when the processing unit determines that the imaging unit has an unused area, the processing unit adjusts the displacement of the current image on the imaging unit; when the processing unit determines that the imaging unit has no unused area, the processing unit determines whether the current image can be deleted; when the processing unit determines that the current image is deletable, the processing unit first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when the processing unit determines that the current image is not deletable, the processing unit first reduces the current image according to the size of the projection plane, and then centers the current image relative to the projection plane.

31. The projector according to claim 26, wherein: After determining the current displacement change corresponding to the current temperature, the processing unit determines whether the current image can be deleted; when the processing unit determines that the current image cannot be deleted, the processing unit adjusts the displacement of the current image on the imaging unit; when the processing unit determines that the current image can be deleted, the processing unit determines whether the proportion of the current image needs to be maintained; when the processing unit determines that the proportion of the current image needs to be maintained, the processing unit first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when the processing unit determines that the proportion of the current image does not need to be maintained, the processing unit directly crops the current image according to the size of the projection plane.

32. The projector according to claim 26, wherein: After determining the current displacement change corresponding to the current temperature, the processing unit determines whether the displacement adjustment unit is adjustable; when the processing unit determines that the displacement adjustment unit is adjustable, the processing unit controls the displacement adjustment unit to adjust the displacement of the lens; when the processing unit determines that the displacement adjustment unit is not adjustable, the processing unit determines whether the imaging unit has an unused area; when the processing unit determines that the imaging unit has an unused area, the processing unit adjusts the displacement of the current image on the imaging unit; when the processing unit determines that the imaging unit has no unused area, the processing unit determines whether the current image can be deleted; When the processing unit determines that the current image is not deletable, the processing unit first reduces the current image according to the size of the projection plane, and then centers the current image relative to the projection plane; when the processing unit determines that the current image is deletable, the processing unit determines whether the proportion of the current image needs to be maintained; when the processing unit determines that the proportion of the current image needs to be maintained, the processing unit first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when the processing unit determines that the proportion of the current image does not need to be maintained, the processing unit directly crops the current image according to the size of the projection plane.

33. The projector according to claim 26, wherein: After determining the current displacement change amount corresponding to the current temperature, the processing unit determines whether the imaging unit has an unused area; when the processing unit determines that the imaging unit has an unused area, the processing unit adjusts the displacement of the current image on the imaging unit; when the processing unit determines that the imaging unit has no unused area, the processing unit determines whether the displacement adjustment unit is adjustable; when the processing unit determines that the displacement adjustment unit is adjustable, the processing unit controls the displacement adjustment unit to adjust the displacement of the lens; when the processing unit determines that the displacement adjustment unit is not adjustable, the processing unit determines whether the current image can be deleted; When the processing unit determines that the current image is not deletable, the processing unit first reduces the current image according to the size of the projection plane, and then centers the current image relative to the projection plane; when the processing unit determines that the current image is deletable, the processing unit determines whether the proportion of the current image needs to be maintained; when the processing unit determines that the proportion of the current image needs to be maintained, the processing unit first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when the processing unit determines that the proportion of the current image does not need to be maintained, the processing unit directly crops the current image according to the size of the projection plane.

34. A projection method, characterized in that: Include: Providing multiple temperature ranges and multiple focal length changes corresponding to the multiple temperature ranges; Receive the current image and sense the current temperature; comparing the current temperature with the plurality of temperature ranges to determine a current focal length variation corresponding to the current temperature from the plurality of focal length variations; as well as The sharpening process is performed on the current image according to the current focal length change, specifically including: After determining the current focal length change amount corresponding to the current temperature, the projection method determines whether the focal length adjustment unit is adjustable; When it is determined that the focus adjustment unit is adjustable, the projection method controls the focus adjustment unit to adjust the focus of the lens; when it is determined that the focus adjustment unit is not adjustable, the projection method executes the sharpening procedure on the current image.

35. The projection method according to claim 34, characterized in that: Also includes: Providing a plurality of displacement changes corresponding to the plurality of temperature ranges, wherein the displacement changes are horizontal displacement changes and / or vertical displacement changes; comparing the current temperature with the plurality of temperature ranges to determine a current displacement change corresponding to the current temperature from the plurality of displacement changes; and Perform at least one of the following steps according to the current displacement change: Controlling the displacement adjustment unit to adjust the displacement of the lens; adjusting the displacement of the current image on the imaging unit; and An image adjustment procedure is performed on the current image.

36. The projection method according to claim 35, characterized in that: The displacement adjustment unit includes a horizontal displacement adjustment motor and a vertical displacement adjustment motor. The projection method controls the horizontal displacement adjustment motor to adjust the horizontal displacement of the lens and / or controls the vertical displacement adjustment motor to adjust the vertical displacement of the lens according to the current displacement variation.

37. The projection method according to claim 35, characterized in that: The image adjustment procedure includes at least one of the following steps: reducing the current image; enlarging the current image; and cropping the current image.

38. The projection method according to claim 37, characterized in that: Before executing the image adjustment procedure on the current image, the projection method determines whether the current image can be deleted; when it is determined that the current image is deletable, the projection method first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when it is determined that the current image is not deletable, the projection method first reduces the current image according to the size of the projection plane, and then centers the current image relative to the projection plane.

39. The projection method according to claim 35, characterized in that: After determining the current displacement change corresponding to the current temperature, the projection method determines whether the imaging unit has an unused area; when it is determined that the imaging unit has an unused area, the projection method adjusts the displacement of the current image on the imaging unit; when it is determined that the imaging unit has no unused area, the projection method determines whether the current image can be deleted; when it is determined that the current image is deletable, the projection method first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when it is determined that the current image is not deletable, the projection method first reduces the current image according to the size of the projection plane, and then centers the current image relative to the projection plane.

40. The projection method according to claim 35, characterized in that: After determining the current displacement change corresponding to the current temperature, the projection method determines whether the current image can be deleted; when it is determined that the current image cannot be deleted, the projection method adjusts the displacement of the current image on the imaging unit; when it is determined that the current image can be deleted, the projection method determines whether the proportion of the current image needs to be maintained; when it is determined that the proportion of the current image needs to be maintained, the projection method first enlarges the current image according to the size of the projection plane, and then crops the current image according to the size of the projection plane; when it is determined that the proportion of the current image does not need to be maintained, the projection method directly crops the current image according to the size of the projection plane.

41. The projection method according to claim 35, characterized in that: After determining the current displacement change corresponding to the current temperature, the projection method determines whether the displacement adjustment unit is adjustable; when it is determined that the displacement adjustment unit is adjustable, the projection method controls the displacement adjustment unit to adjust the displacement of the lens; when it is determined that the displacement adjustment unit is not adjustable, the projection method determines whether the imaging unit has an unused area; when it is determined that the imaging unit has an unused area, the projection method adjusts the displacement of the current image on the imaging unit; when it is determined that the imaging unit has no unused area, the projection method determines whether the current image can be deleted; when it is determined that the current image cannot be deleted, the projection method first reduces the current image according to the size of the projection plane, and then centers the current image relative to the projection plane; when it is determined that the current image is deletable, the projection method determines whether the proportion of the current image needs to be maintained; when it is determined that the proportion of the current image needs to be maintained, the projection method first enlarges the current image according to the size of the projection plane, and then cuts the current image according to the size of the projection plane; when it is determined that the proportion of the current image does not need to be maintained, the projection method directly cuts the current image according to the size of the projection plane.

42. The projection method according to claim 35, characterized in that: After determining the current displacement change corresponding to the current temperature, the projection method determines whether the imaging unit has an unused area; when it is determined that the imaging unit has an unused area, the projection method adjusts the displacement of the current image on the imaging unit; when it is determined that the imaging unit has no unused area, the projection method determines whether the displacement adjustment unit is adjustable; when it is determined that the displacement adjustment unit is adjustable, the projection method controls the displacement adjustment unit to adjust the displacement of the lens; when it is determined that the displacement adjustment unit is not adjustable, the projection method determines whether the current image can be deleted; when it is determined that the current image cannot be deleted, the projection method first reduces the current image according to the size of the projection plane, and then centers the current image relative to the projection plane; when it is determined that the current image can be deleted, the projection method determines whether the ratio of the current image needs to be maintained; when it is determined that the ratio of the current image needs to be maintained, the projection method first enlarges the current image according to the size of the projection plane, and then cuts the current image according to the size of the projection plane; when it is determined that the ratio of the current image does not need to be maintained, the projection method directly cuts the current image according to the size of the projection plane.

Images