Method for adjusting the brightness of a projection device, brightness adjustment device for a projection device, projection device, and computer-readable storage medium

Abstract

This application discloses a method, device, and storage medium for adjusting brightness of a projection device, which is related to the optical field. When the method is applied to a projection device, the method controls not only the operation of the aperture but also the driving current for driving the light source to adjust the brightness of the projection device, thereby reducing or eliminating the color shift phenomenon that occurs on the screen projected by the projection device. According to the embodiments of this application, the display effect of the screen projected by the projection device can be improved.

Description

Technical Field

[0001] This application relates to the field of optics, and particularly to a method, an apparatus, and a storage medium for adjusting the brightness of a projection device.

Background Art

[0002] A projection device is a device that can project an image or video onto a screen and is widely used in various places. Since the environmental brightness in different places is different, in order to ensure that the brightness of the projection screen projected from the projection device can meet the requirements, a brightness adjustment operation can be performed on the projection device to adjust the brightness of the projected projection screen.

[0003] However, in actual operation, after adjusting the brightness of the projection device, color deviation occurs in the projection screen projected from the projection device, and the display effect of the projection screen of the projection device deteriorates.

Summary of the Invention

Problems to be Solved by the Invention

[0004] Embodiments of this application provide a method, an apparatus, and a storage medium for adjusting the brightness of a projection device that can improve the display effect of the screen projected from the projection device.

Means for Solving the Problems

[0005] In a first aspect, embodiments of this application provide a method for adjusting the brightness of a projection device applied to a projection device. The projection device includes a light source and an aperture. The light source includes a colored light source. The method includes determining a target aperture diameter of the aperture corresponding to a first brightness level based on the obtained first brightness level, and determining a first drive current corresponding to the target aperture diameter based on a predetermined first setting mapping relationship. The first setting mapping relationship includes a correspondence between the aperture diameter and the drive current for driving the colored light source to achieve white balance for the screen projected from the projection device, and controlling the aperture diameter of the aperture to operate to the target aperture diameter and driving the colored light source using the first drive current.

[0006] In a second aspect, an embodiment of the present invention provides a brightness adjustment device for a projection device, the projection device comprising a light source and an aperture, the light source including a colored light source, the device comprising: an aperture diameter determination module configured to determine a target aperture diameter of the aperture corresponding to a first brightness level based on an acquired first brightness level; a drive current determination module configured to determine a first drive current corresponding to a target aperture diameter based on a predetermined first setting mapping relationship, the first setting mapping relationship including a correspondence between an aperture diameter and a drive current for driving the colored light source to achieve white balance; and a control module configured to control the aperture diameter of the aperture to operate to a target aperture diameter and to drive the colored light source using the first drive current.

[0007] In a third aspect, an embodiment of the present invention provides a projection device comprising a light source including a colored light source, an aperture, a memory storing computer program instructions, and a processor that implements the brightness adjustment method of the projection device of the first aspect when executing computer program instructions.

[0008] In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium in which computer program instructions are stored, and when the computer program instructions are executed by a processor, the brightness adjustment method of the projection apparatus of the first aspect is realized. [Effects of the Invention]

[0009] Embodiments of the present invention provide a method, apparatus, and storage medium for adjusting the brightness of a projection device. Based on a first brightness level obtained, a target aperture diameter to which the aperture of the projection device should be adjusted is determined. Based on a first setting mapping relationship that includes the correspondence between the aperture diameter and a drive current capable of driving a colored light source to achieve white balance for the screen projected from the projection device, a first drive current corresponding to the target aperture diameter that can achieve white balance for the screen projected from the projection device is determined. The aperture diameter of the aperture is controlled to operate up to the target aperture diameter, and the colored light source is driven using the first drive current. As a result, light emitted from the colored light source driven using the first drive current passes through the aperture of the target aperture diameter to achieve white balance, guaranteeing brightness corresponding to the first brightness level. This reduces or eliminates color distortion in the screen projected from the projection device and improves the display effect of the screen projected from the projection device. [Brief explanation of the drawing]

[0010] [Figure 1] This is a flowchart of a method for adjusting the brightness of a projection device according to one embodiment of the present invention. [Figure 2] This is a flowchart of a method for adjusting the brightness of a projection device according to another embodiment of the present invention. [Figure 3] This is a flowchart of a method for adjusting the brightness of a projection device according to yet another embodiment of the present invention. [Figure 4] This is a flowchart of a method for adjusting the brightness of a projection device according to yet another embodiment of the present invention. [Figure 5] This is a schematic diagram showing the configuration of a brightness adjustment device for a projection device according to one embodiment of the present invention. [Figure 6] This is a schematic diagram showing the configuration of a brightness adjustment device for a projection apparatus according to another embodiment of the present invention. [Figure 7] This is a schematic diagram showing the configuration of a brightness adjustment device for a projection apparatus according to yet another embodiment of the present invention. [Figure 8] This is a schematic diagram showing the configuration of a projection device according to one embodiment of the present invention. [Modes for carrying out the invention]

[0011] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application are briefly introduced above. Those skilled in the art can obtain other relevant drawings based on these drawings without any creative effort.

[0012] The following describes in detail the features and exemplary embodiments of various aspects of the present application. The present application will be described in detail with reference to the drawings in order to more clearly illustrate its purpose, technical solution, and advantages. It should be understood that the specific embodiments described herein are used solely for illustrative purposes and are not limiting. Those skilled in the art will be able to implement the embodiments of the present application even without some of these specific details. The following description of embodiments is intended solely to provide examples of the present application for a better understanding.

[0013] A projection device is a device that can project images or videos onto a screen and is widely used in various locations. Because the ambient brightness differs from place to place, the brightness of the projected image can be adjusted by performing a brightness adjustment operation on the projection device so that the brightness of the projected image meets the requirements. However, in actual operation, after adjusting the brightness of the projection device, color shift occurs in the projected image, and the display effect of the projected image decreases.

[0014] For the sake of explanation, a brief description of some of the structure of a projection device is provided here. A projection device comprises a light source and an aperture. The light source can provide light to the projection device and may include colored light sources and white light sources. A colored light source can provide colored light and may include, for example, a red (i.e., R) lamp, a green (i.e., G) lamp, and a blue (i.e., B) lamp. A white light source can provide white light and may include, for example, a BP lamp. The aperture is located between the light source and the lens of the projection device and the light emitted from the light source can pass through the aperture and the amount of light output from the aperture can be controlled by adjusting the aperture diameter. If the projected image should be a bright image, the aperture diameter can be enlarged to increase the amount of light passing through, and if the projected image should be a dark image, the aperture diameter can be reduced to decrease the amount of light passing through.

[0015] This invention provides a brightness adjustment method, apparatus, and storage medium for a projection device that can determine the aperture diameter to be reached by the aperture in the projection device according to the required brightness level for the projection device. In addition to adjusting the aperture diameter, it further provides a drive current for driving a colored light source. Driving this light source allows the screen projected from the projection device to achieve white balance under the adjusted aperture diameter conditions, reduces or eliminates color distortion, and improves the display effect of the projected screen of the projection device.

[0016] A first aspect of the present application provides a method for adjusting the brightness of a projection device that can be applied to a projection device. A description of the projection device can be found above and will not be repeated here. The method for adjusting the brightness of a projection device can be performed by a brightness adjustment device for the projection device, and is not limited to this method. Figure 1 is a flowchart of a method for adjusting the brightness of a projection device according to one embodiment of the present application. As shown in Figure 1, the method for adjusting the brightness of a projection device may include steps S101 to S103.

[0017] In step S101, the target aperture diameter corresponding to the first brightness level is determined based on the acquired first brightness level.

[0018] The first brightness level is the brightness level that the projection device has acquired and intends to adopt. There is a corresponding relationship between the brightness level and the aperture diameter of the aperture. The higher the brightness level, the larger the aperture diameter, and the brighter the screen projected from the projection device. The target aperture diameter is the aperture diameter corresponding to the first brightness level.

[0019] In step S102, based on a predetermined first setting mapping relationship, a first drive current corresponding to the target aperture diameter is determined.

[0020] The first setting mapping relationship includes the corresponding relationship between the aperture diameter and the drive current for driving the colored light source to achieve white balance for the screen projected from the projection device. When the aperture diameter changes, the amount of light passing through the aperture also changes, and color deviation occurs after the colored light emitted from the colored light source passes through the aperture. In white balance, a white object can be restored to white, and color deviation can be reduced or eliminated by white balance. The first setting mapping relationship includes the corresponding relationship between the aperture diameter and the drive current for driving the colored light source that can eliminate color deviation. The first setting mapping relationship can be realized by methods such as a mapping table, a mapping curve, etc., and is not limited here. The first drive current is the drive current corresponding to the target aperture diameter within the first setting mapping relationship.

[0021] For example, Table 1 shows an example of the corresponding relationship between the aperture diameter and the drive current.

Table 1

[0022] The drive currents a1 to a13 in Table 1 are different drive current values.

[0023] In step S103, the aperture diameter of the aperture is controlled to operate to the target aperture diameter, and the colored light source is driven using the first drive current.

[0024] By controlling the aperture diameter to expand or contract it to a target aperture diameter, and using the first drive current to drive a colored light source, the colored light emitted from the colored light source can be mixed and passed through the aperture to reduce or eliminate color distortion, thereby reducing or eliminating color distortion in the image projected from the projection device.

[0025] If the colored light source includes multiple colored light sources of different colors, the first drive current may be the total drive current of the multiple colored light sources of different colors, or the first drive current may include the drive current corresponding to each of the multiple colored light sources of different colors.

[0026] In the embodiments of the present invention, a target aperture diameter to which the aperture of the projection device should be adjusted is determined based on a first brightness level obtained. Based on a first setting mapping relationship that includes the correspondence between the aperture diameter and a drive current that can drive a colored light source to achieve white balance for the screen projected from the projection device, a first drive current corresponding to the target aperture diameter that can achieve white balance for the screen projected from the projection device is determined. The aperture diameter of the diaphragm is controlled to operate up to the target aperture diameter, and the colored light source is driven using the first drive current. As a result, the light emitted from the colored light source driven using the first drive current passes through the aperture of the target aperture diameter to achieve white balance and guarantee brightness corresponding to the first brightness level. This reduces or eliminates color distortion in the screen projected from the projection device and improves the display effect of the screen projected from the projection device.

[0027] The display effect of the projector is improved and the brightness stability of the projected screen is also good when the brightness adjustment method for the projector provided in the embodiment of the present application is used. For example, Table 2 shows the brightness of the screen projected from the projector in three tests using the brightness adjustment method for the projector provided in the embodiment of the present application. [Table 2]

[0028] Here, the projected brightness in the first test includes the brightness of the screen projected from the projector under different brightness levels in the first test, the projected brightness in the second test includes the brightness of the screen projected from the projector under different brightness levels in the second test, and the projected brightness in the third test includes the brightness of the screen projected from the projector under different brightness levels in the third test. As can be seen from Table 2, under the same brightness level, the brightness of the screen projected by the projector in different tests is relatively close, and good stability can be maintained.

[0029] In some examples, the first brightness level may be obtained by a manual adjustment input, specifically, the projection device can receive a manual adjustment input from the user and determine the first brightness level based on the user's manual adjustment input.

[0030] In some other examples, the first brightness level described above may be obtained by matching it with the ambient brightness. Specifically, the projection device can acquire the current ambient brightness, and the projection device has a correspondence between the ambient brightness and the brightness level. This correspondence records the brightness level that matches the ambient brightness, and from this correspondence, the brightness level that matches the current ambient brightness, i.e., the first brightness level, can be found.

[0031] The maximum brightness level within a brightness level matches the maximum aperture, the minimum brightness level within a brightness level matches the minimum aperture, and the aperture corresponding to brightness levels between the maximum and minimum brightness levels is greater than the minimum aperture and less than the maximum aperture. The aperture may be expressed as a percentage of the maximum aperture or as a multiple of the minimum aperture. A control interface may be set up to control the aperture of the aperture based on brightness units. The aperture corresponding to the maximum brightness level, the aperture corresponding to the minimum brightness level, and the aperture corresponding to brightness levels between the maximum and minimum brightness levels must ensure that the brightness of the image projected from the projection device meets the requirements.

[0032] In some embodiments, the projection device further includes an aperture motor, which can control the aperture diameter to enlarge or reduce it. Figure 2 is a flowchart of a method for adjusting the brightness of a projection device according to another embodiment of the present invention, the difference between Figure 2 and Figure 1 being that step S101 in Figure 1 is specifically subdivided into steps S1011 and S1012 in Figure 2, and step S103 in Figure 1 is specifically subdivided into step S1031 in Figure 2.

[0033] In step S1011, a target number of rotation steps corresponding to the first brightness level of the aperture motor is obtained based on the first brightness level.

[0034] There is a correspondence between the brightness level and the number of rotation steps of the aperture motor; different brightness levels correspond to different rotation steps of the aperture motor. The target number of rotation steps is the number of rotation steps corresponding to the first brightness level.

[0035] In step S1012, the target aperture diameter for the aperture corresponding to the target number of rotation steps is determined based on the relationship between the target number of rotation steps and the number of steps.

[0036] The rotation of the aperture motor can control the change in the aperture diameter, and the aperture is controlled to expand or contract to different diameters depending on the number of rotation steps of the aperture motor. The step-number-aperture correspondence relationship includes the correspondence between the number of rotation steps of the aperture motor and the aperture diameter. The target aperture diameter is the aperture diameter corresponding to the target number of rotation steps in the step-number-aperture correspondence relationship.

[0037] In some cases, brightness level is positively correlated with the number of rotation steps of the aperture motor, and aperture diameter is also positively correlated with the number of rotation steps of the aperture motor. The higher the brightness level, the higher the number of rotation steps of the aperture motor, and the larger the aperture diameter, the brighter the image projected from the projection device. Similarly, the lower the brightness level, the lower the number of rotation steps of the aperture motor, and the smaller the aperture diameter, the brighter the image projected from the projection device.

[0038] For example, Table 3 shows an example of the correspondence between brightness level, number of rotation steps of the aperture motor, and aperture diameter. [Table 3]

[0039] In Table 3, the number of fine adjustment rotation steps is the number of rotation steps in the fine adjustment method, and the number of coarse adjustment rotation steps is the number of rotation steps in the coarse adjustment method. In Table 3, the number of fine adjustment rotation steps = number of coarse adjustment rotation steps × 32. As the brightness level increases, the number of fine adjustment rotation steps, the number of coarse adjustment rotation steps, and the aperture diameter also increase. When the brightness level is divided into fine intervals, a curve representing the step number-to-aperture correspondence can be obtained by fitting the rotation step number and aperture diameter in Table 3, and this curve can be used to obtain aperture diameters corresponding to other rotation step numbers not listed in Table 3.

[0040] In step S1031, the aperture motor is controlled to rotate up to the target number of rotation steps, thereby operating the aperture diameter to the target aperture diameter, and the first drive current is used to drive the colored light source.

[0041] Once the first brightness level is determined, the aperture motor can be rotated to a target number of rotation steps by controlling its rotation. As the aperture motor drives the aperture, the aperture diameter is also expanded or contracted to the target aperture diameter. In addition to controlling the rotation of the aperture motor, the first drive current is used to drive a colored light source. The colored light emitted by the colored light source by the first drive current passes through an aperture of the target aperture diameter, reducing or eliminating the color shift phenomenon of the colored light passing through the aperture. This reduces or eliminates the color shift of the image projected from the projection device, improving the display effect.

[0042] In some embodiments, the first setting mapping relationship may include a setting mapping function that can represent a continuous correspondence between aperture diameter and drive current for driving a colored light source to achieve white balance on the projected image from the projection device. The setting mapping function can be constructed based on the drive current that can achieve white balance on the projected image from the projection device, obtained by adjusting for different aperture diameters. The specific implementation form of the setting mapping function is not limited here; for example, the setting mapping function may be implemented as a smooth curve that can represent the correspondence between aperture diameter and drive current for driving a colored light source to achieve white balance on the projected image from the projection device. Figure 3 is a flowchart of a brightness adjustment method for a projection device according to yet another embodiment of the present application, the difference between Figure 3 and Figure 1 being that the brightness adjustment method for a projection device shown in Figure 3 may further include steps S104 to S107.

[0043] In step S104, select several different aperture sizes.

[0044] In some examples, you can select the maximum aperture, the minimum aperture, and at least one aperture between the maximum and minimum apertures, and there are no specific values ​​for the apertures you select or the number of apertures you select.

[0045] In step S105, the drive current for driving the colored light source is adjusted under the conditions of each aperture size until the image projected from the projection device achieves white balance.

[0046] The aperture can be controlled to operate sequentially at each aperture size. For example, by controlling the number of rotation steps of the aperture motor, the aperture can be operated sequentially at each aperture size. Under the conditions of each aperture size, the drive current that drives the colored light source can be adjusted from a large value to a small value, or from a small value to a large value. When the image projected from the projection device achieves white balance, the drive current of the colored light source at the time the image projected from the projection device achieves white balance is recorded.

[0047] In step S106, multiple setting mapping points are obtained based on each aperture size and the drive current corresponding to each aperture size that causes the screen projected from the projection device to achieve white balance.

[0048] By using the aperture diameter as the horizontal coordinate and the drive current required to achieve white balance on the image projected from the projection device under this aperture diameter as the vertical coordinate, a corresponding setting mapping point can be obtained. Alternatively, by using the aperture diameter as the vertical coordinate and the drive current required to achieve white balance on the image projected from the projection device under this aperture diameter as the horizontal coordinate, a corresponding setting mapping point can be obtained. Each aperture diameter corresponds to one setting mapping point, and multiple aperture diameters can yield multiple setting mapping points.

[0049] In step S107, multiple setting mapping points are fitted to obtain a setting mapping function.

[0050] Through fitting, a setting mapping function can be calculated using the coordinates of multiple setting mapping points. In some examples, multiple setting mapping points can be connected by a smooth curve, and this smooth curve is the setting mapping curve corresponding to the setting mapping function. By using an arbitrary aperture diameter as the input value for the setting mapping function, the drive current corresponding to the aperture diameter can be obtained using this setting mapping function. In the above embodiment, the first drive current can be determined using the setting mapping function.

[0051] In some embodiments, repeated use may damage the aperture in the projection device, preventing it from zooming in or out. In this case, the white light source can be driven by a second drive current, thereby ensuring the brightness of the image projected from the projection device. Figure 4 is a flowchart of a method for adjusting the brightness of a projection device according to yet another embodiment of the present invention, the difference between Figure 4 and Figure 1 being that the method for adjusting the brightness of a projection device shown in Figure 4 may further include steps S108 to S111.

[0052] In step S108, if the aperture is damaged, the current aperture diameter of the damaged aperture is determined based on the feedback information.

[0053] The aperture diameter is adjusted by an aperture motor, which returns feedback information after executing a command. This feedback information can represent the number of rotation steps of the aperture motor, thereby representing the current aperture diameter corresponding to that number of rotation steps, or the feedback information can directly represent the current aperture diameter of the aperture. If the aperture is damaged, the aperture motor cannot rotate either, meaning the aperture motor stops at a fixed number of rotation steps. Correspondingly, the feedback information represents the number of rotation steps at which the aperture motor is stopped, thereby representing the current aperture diameter of the damaged aperture, or the feedback information can directly represent the current aperture diameter of the damaged aperture.

[0054] In step S109, if the current aperture diameter is greater than or equal to a predetermined aperture exchange diameter, a second setting mapping relationship corresponding to the current aperture diameter is determined, and a second drive current corresponding to the acquired second brightness level is determined based on the second setting mapping relationship.

[0055] The aperture replacement diameter is a diameter threshold used to determine whether or not the aperture needs to be replaced. It can be set based on the scene, demand, experience, etc., and is not limited here. If the aperture diameter is equal to or greater than the aperture replacement diameter, the projection device can be used continuously without replacing the aperture. If the aperture diameter is less than the aperture replacement diameter, the aperture needs to be replaced, and if it is not replaced, the projection device cannot be used normally.

[0056] Each aperture corresponds to one second setting mapping relationship, and different apertures may have different second setting mapping relationships. The second setting mapping relationship includes a correspondence between a brightness level and a drive current required to drive a white light source to achieve a predetermined standard required brightness on the screen projected from the projection device. The standard required brightness can be a brightness level appropriate to the user's vision and can be set based on the scene, demand, experience, etc., but is not limited thereto. The second setting mapping relationship can be implemented using methods such as a mapping table or a mapping curve. The second brightness level is the brightness level that the projection device needs to adopt at present. The second brightness level can be obtained by manual adjustment input or by matching with ambient brightness; for specific details, refer to the description of the first brightness level in the above embodiment, which will not be repeated here. The second drive current is the drive current for driving the white light source that corresponds to the second brightness level in the second setting mapping relationship.

[0057] In some cases, a second setting mapping relationship may be established in advance. Multiple aperture diameters greater than or equal to the aperture exchange diameter are selected, and multiple brightness levels are selected under the conditions of each aperture diameter. Under each brightness level, the drive current for driving the white light source is adjusted until the brightness of the screen projected from the projection device achieves the standard required brightness, and the correspondence between the drive current and the brightness level when the brightness of the screen projected from the projection device achieves the standard required brightness is recorded. By combining the correspondence between each brightness level at the same aperture diameter and the drive current that can make the brightness of the screen projected from the projection device achieve the standard required brightness, a second setting mapping relationship corresponding to each aperture diameter can be obtained. The second setting mapping relationship can be realized as a brightness current mapping function, and by fitting multiple brightness current setting points obtained at the same aperture diameter with each brightness level at the same aperture diameter and the drive current that can make the brightness of the screen projected from the projection device achieve the standard required brightness as brightness current setting points, a brightness current mapping function representing the second setting mapping relationship can be obtained, and the second drive current corresponding to the second brightness level can be calculated using the brightness current mapping function. In some examples, the implementation of the brightness-current mapping function is not limited here; for example, the brightness-current mapping function may be implemented as a smooth brightness-current mapping curve that can represent a second setting mapping relationship.

[0058] In step S110, the second drive power is used to drive the white light source.

[0059] The white light emitted from the white light source driven by the second drive current passes through the damaged aperture, thereby achieving the brightness of the screen projected from the projection device to the standard required brightness. This guarantees the brightness of the screen projected from the projection device, allows the projection device to be used normally even if the aperture is damaged, and guarantees the display effect of the screen projected from the projection device when the aperture is damaged.

[0060] In step S111, if the current aperture diameter is less than a predetermined aperture diameter, prompt information is generated, and the projection device is controlled to project a screen containing the prompt information.

[0061] If the aperture diameter is less than the aperture replacement diameter, it indicates that the aperture diameter of the damaged aperture is small, and even if the drive current is adjusted, it will be difficult to achieve the brightness of the image projected from the projection device to the standard required brightness. Prompt information is used to encourage aperture replacement, and by displaying prompt information on the projected image, the user can be prompted to replace the aperture.

[0062] A second aspect of the present application provides a brightness adjustment device for a projection device applicable to a projection device. Details regarding the projection device can be found in the specific description in the above embodiment and will not be repeated here. Figure 5 is a schematic diagram showing the configuration of a brightness adjustment device for a projection device according to one embodiment of the present application. As shown in Figure 5, the brightness adjustment device 200 for the projection device comprises an aperture diameter determination module 201, a drive current determination module 202, and a control module 203.

[0063] The aperture diameter determination module 201 may be configured to determine a target aperture diameter corresponding to a first brightness level based on the acquired first brightness level.

[0064] The drive current determination module 202 may be configured to determine a first drive current corresponding to a target aperture based on a predetermined first setting mapping relationship.

[0065] The first setting mapping relationship includes the correspondence between the aperture diameter and the drive current required to drive a colored light source and achieve white balance on the image projected from the projection device.

[0066] The control module 203 may be configured to control the aperture diameter to operate it to a target aperture diameter and to drive a colored light source using a first drive current.

[0067] In the embodiments of the present invention, a target aperture diameter to which the aperture of the projection device should be adjusted is determined based on a first brightness level obtained. Based on a first setting mapping relationship that includes the correspondence between the aperture diameter and a drive current capable of driving a colored light source to achieve white balance for the screen projected from the projection device, a first drive current corresponding to the target aperture diameter that can achieve white balance for the screen projected from the projection device is determined. The aperture diameter of the diaphragm is controlled to operate up to the target aperture diameter, and the colored light source can be driven using the first drive current. As a result, the light emitted from the colored light source driven using the first drive current passes through the aperture of the target aperture diameter to achieve white balance, guaranteeing brightness corresponding to the first brightness level, thereby reducing or eliminating color distortion in the screen projected from the projection device and improving the display effect of the screen projected from the projection device.

[0068] In some cases, the first brightness level is obtained by a manual adjustment input or by matching it with ambient brightness. The maximum brightness level within the brightness levels is matched with the maximum aperture, and the minimum brightness level within the brightness levels is matched with the minimum aperture.

[0069] In some embodiments, the first setting mapping relationship includes a setting mapping function. Figure 6 is a schematic diagram showing the configuration of a brightness adjustment device for a projection device according to another embodiment of the present invention, the difference between Figure 6 and Figure 5 being that the brightness adjustment device 200 for the projection device shown in Figure 6 comprises an aperture selection module 204, an adjustment module 205, and a curve construction module 206.

[0070] The aperture diameter selection module 204 can be configured to select from a number of different aperture diameters.

[0071] The adjustment module 205 may be configured to adjust the drive current for driving the colored light source until the image projected from the projection device achieves white balance under the conditions of each aperture size.

[0072] The curve construction module 206 may be configured to obtain a set mapping function by obtaining a set mapping function based on each aperture size and the corresponding drive current that causes the screen projected from the projection device to achieve white balance, and by fitting the set mapping function to the set mapping points.

[0073] In some embodiments, the projection device is further equipped with an aperture motor.

[0074] The aperture diameter determination module 201 described above may be configured to obtain a target number of rotational steps corresponding to a first brightness level of the aperture motor based on a first brightness level, and to determine a target aperture diameter of the aperture corresponding to the target number of rotational steps based on the target number of rotational steps and the step number aperture correspondence relationship, the step number aperture correspondence relationship includes the correspondence relationship between the number of rotational steps of the aperture motor and the aperture diameter of the aperture.

[0075] In some cases, brightness level is positively correlated with the number of rotation steps of the aperture motor, and aperture diameter is positively correlated with the number of rotation steps of the aperture motor.

[0076] In some examples, the light source further includes a white light source. Figure 7 is a schematic diagram showing the configuration of a brightness adjustment device for a projection device according to yet another embodiment of the present application, the difference between Figure 7 and Figure 5 being that the brightness adjustment device 200 for the projection device further includes a damage aperture determination module 207, a damage current determination module 208, and a prompt control module 209.

[0077] The damaged aperture determination module 207 may be configured to determine the current aperture of the damaged aperture based on feedback information if the aperture is damaged.

[0078] The damage current determination module 208 may be configured to determine a second setting mapping relationship corresponding to the current aperture if the current aperture is greater than or equal to a predetermined aperture replacement aperture, and to determine a second drive current corresponding to the acquired second brightness level based on the second setting mapping relationship.

[0079] The second setting mapping relationship includes the correspondence between the brightness level and the drive current required to drive the white light source and achieve a predetermined standard required brightness for the screen projected from the projection device.

[0080] The control module 203 described above may be further configured to drive a white light source using a second drive current.

[0081] The prompt control module 209 may be configured to generate prompt information and control the projection device to project a screen containing the prompt information if the current aperture is less than a predetermined aperture change aperture. The prompt information is used to encourage aperture change.

[0082] A third aspect of the present invention further provides a projection device. Figure 8 is a schematic diagram showing the configuration of a projection device according to one embodiment of the present invention, and as shown in Figure 8, the projection device 300 comprises a light source 301, an aperture 302, a memory 303, and a processor 304.

[0083] Memory 303 stores computer program instructions that can be executed by the processor 304.

[0084] In some examples, the processor 304 described above may include a central processing unit (CPU) or an application-specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

[0085] The memory 303 may include read-only memory (ROM), random access memory (RAM), magnetic disk devices, optical disk devices, flash memory devices, and electrical, optical, or other physical / tangible memory storage devices. Therefore, the memory typically includes one or more tangible (non-temporary) computer-readable storage media (e.g., memory devices) on which software containing computer-executable instructions is encoded, and which, when executed (e.g., by one or more processors), is operable to perform the operations described with reference to the brightness adjustment method of the projection apparatus according to the embodiments of the present application.

[0086] The processor 304 is configured to read executable program code stored in memory 303, execute a computer program corresponding to the executable program code, and realize the brightness adjustment method of the projection device in the above embodiment.

[0087] In some examples, the projection device 300 may further include a communication interface 305 and a bus 306. Here, as shown in Figure 8, the memory 303, processor 304, and communication interface 305 can communicate with each other via the bus 306.

[0088] The communication interface 305 is primarily used to enable communication between each module, apparatus, unit, and / or device in the embodiments of the present application. Furthermore, input devices and / or output devices can be accessed via the communication interface 305.

[0089] Bus 306 may include hardware, software, or both that couple the components of the projection device 300 with each other. As an example, bus 306 may include, but is not limited to, an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a Hyper Transport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an InfiniBand interconnect, a Low Pin Count (LPC) bus, a memory bus, a Micro Channel Architecture (MCA) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-E) bus, a Serial Advanced Technology Attachment (SATA) bus, a Video Electronics Standards Association Local Bus (VLB) bus, or other appropriate buses, or two or more combinations thereof. Where appropriate, bus 306 may include one or more buses. While the embodiments of this application describe and illustrate a specific bus, this application considers any suitable bus or interconnection.

[0090] A fourth aspect of the present application further provides a computer-readable storage medium in which computer program instructions are stored, and when executed by a processor, the computer program instructions realize the brightness adjustment method of the projection device in the above embodiment and achieve the same technical effect, which will not be described again here to avoid duplication. Here, the computer-readable storage medium may include, but is not limited to, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks, which are non-temporary computer-readable storage media.

[0091] The embodiment of the present application provides a computer program product in which, when the instructions within the computer program product are executed by the processor of the electronic device, the electronic device is made to perform the brightness adjustment method of the projection device in the above embodiment, thereby achieving the same technical effect. To avoid duplication, this will not be described again here.

[0092] It should be made clear that each embodiment in this specification is described progressively, and the same or similar parts between embodiments can be referenced to one another, while each embodiment focuses on the differences from the other embodiments. For embodiments of apparatus, embodiments of projection apparatus, embodiments of computer-readable storage media, and embodiments of computer program products, the relevant parts can be referenced to the descriptions of the embodiments of the method. This application is not limited to the specific steps and structures described above and shown in the drawings. Those skilled in the art can make various changes, modifications, additions, or changes in the order of steps after understanding the spirit of this application. Also, for the sake of brevity, a detailed description of known method art is omitted here.

[0093] The embodiments of the present application have been described above with reference to flowcharts and / or block diagrams of methods, apparatus (systems), and computer program products relating to embodiments of the present application. It should be understood that each block in a flowchart and / or block diagram, and each combination of blocks in a flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general-purpose computer, a dedicated computer, or other programmable data processing device for the purpose of manufacturing a machine, so that these instructions are executed by the processor of the computer or other programmable data processing device, enabling the implementation of the function / operation specified in one or more blocks of the flowchart and / or block diagram. Such processors may include, but are not limited to, general-purpose computers, dedicated computers, application-specific processors, or field-programmable logic arrays. Furthermore, it should be understood that each block in a block diagram and / or flowchart, and each combination of blocks in a block diagram and / or flowchart, may be implemented by dedicated hardware that performs the specified function or operation, or by a combination of dedicated hardware and computer instructions.

[0094] Those skilled in the art will understand that the above embodiments are illustrative and not limiting. Different technical features described in different embodiments may be combined to achieve beneficial effects. Those skilled in the art will be able to understand and implement other variations of the disclosed embodiments by examining the drawings, specification and claims. In the claims, the term “includes” does not exclude other devices or steps, the quantifier “one” does not exclude plural, and the terms “first” and “second” are used to represent names and do not represent any particular order. Any reference numerals in the claims should not be construed as limiting the scope of protection. The functions of multiple parts described in the claims can be achieved by a single hardware or software module. The fact that certain technical features are described in different dependent claims does not mean that these technical features cannot be combined to achieve beneficial effects.

Claims

1. A method for adjusting the brightness of a projection device, which is applied to a projection device, wherein the projection device comprises a light source and an aperture, the light source includes a colored light source, and the method for adjusting the brightness of the projection device is: Based on the acquired first brightness level, the target aperture diameter of the aperture corresponding to the first brightness level is determined, The first drive current corresponding to the target aperture is determined based on a predetermined first setting mapping relationship, wherein the first setting mapping relationship includes a correspondence between the aperture and the drive current used to drive the colored light source and achieve white balance on the screen projected from the projection device. This includes controlling the aperture diameter of the aperture to operate it to the target aperture diameter, and using the first drive current to drive the colored light source, The light source further includes a white light source, and the method for adjusting the brightness of the projection device is: If the aperture is damaged, the current aperture diameter of the damaged aperture is determined based on the feedback information. If the current aperture diameter is greater than or equal to a predetermined aperture exchange diameter, a second setting mapping relationship corresponding to the current aperture diameter is determined, and based on the second setting mapping relationship, a second drive current corresponding to the acquired second brightness level is determined, wherein the second setting mapping relationship includes a correspondence between the brightness level and the drive current used to drive the white light source to achieve a predetermined standard required brightness for the screen projected from the projection device. A method for adjusting the brightness of a projection device, further comprising driving the white light source using the second drive current.

2. The first setting mapping relationship includes a setting mapping function, Before determining the first drive current corresponding to the target aperture based on the predetermined first setting mapping relationship, the brightness adjustment method of the projection device is as follows: Selecting multiple different aperture diameters, Under the conditions of each aperture size, the drive current for driving the colored light source is adjusted until the image projected from the projection device achieves white balance, Based on each aperture diameter and the drive current corresponding to each aperture diameter that causes the screen projected from the projection device to achieve white balance, multiple setting mapping points are obtained. The further includes fitting a plurality of the aforementioned setting mapping points to obtain the aforementioned setting mapping function, A method for adjusting the brightness of a projection device according to claim 1.

3. The projection device further includes an aperture motor, Based on the acquired first brightness level, determining the target aperture diameter of the aperture corresponding to the first brightness level is: Based on the first brightness level, the number of target rotation steps of the aperture motor corresponding to the first brightness level is obtained, The method involves determining the target aperture diameter of the aperture corresponding to the target number of rotational steps, based on the relationship between the target number of rotational steps and the step number aperture, wherein the step number aperture relationship includes the relationship between the number of rotational steps of the aperture motor and the aperture diameter of the aperture. Including, A method for adjusting the brightness of a projection device according to claim 1.

4. The brightness level is positively correlated with the number of rotation steps of the aperture motor, and the aperture diameter is positively correlated with the number of rotation steps of the aperture motor. A method for adjusting the brightness of a projection device according to claim 3.

5. The first brightness level is obtained by manual adjustment input or by matching with ambient brightness. Within a brightness level range, the maximum brightness level matches the maximum aperture, and within a brightness level range, the minimum brightness level matches the minimum aperture. A method for adjusting the brightness of a projection device according to claim 1.

6. The method for adjusting the brightness of the projection device is as follows: If the current aperture diameter is less than a predetermined aperture replacement diameter, the system further includes generating prompt information and controlling the projection device to project a screen containing the prompt information, the prompt information being used to prompt the replacement of the aperture. A method for adjusting the brightness of a projection device according to claim 1.

7. A brightness adjustment device for a projection device, wherein the projection device comprises a light source and an aperture, the light source includes a colored light source, and the brightness adjustment device for the projection device is A aperture diameter determination module configured to determine a target aperture diameter of the aperture corresponding to the acquired first brightness level, A drive current determination module configured to determine a first drive current corresponding to the target aperture based on a predetermined first setting mapping relationship, wherein the first setting mapping relationship includes a correspondence between the aperture and a drive current for driving the colored light source to achieve white balance on the screen projected from the projection device. The system includes a control module configured to control the aperture diameter of the aperture to operate it up to the target aperture diameter, and to drive the colored light source using the first drive current, The light source further includes a white light source, and the brightness adjustment device of the projection device further includes If the aperture is damaged, a damaged aperture determination module is configured to determine the current aperture diameter of the damaged aperture based on feedback information, A damage current determination module is configured to determine a second setting mapping relationship corresponding to the current aperture when the current aperture is greater than or equal to a predetermined aperture exchange aperture, and to determine a second drive current corresponding to an acquired second brightness level based on the second setting mapping relationship, wherein the second setting mapping relationship includes a correspondence between a brightness level and a drive current that drives the white light source to achieve a predetermined standard required brightness for the screen projected from the projection device. The control module is further configured to drive the white light source using the second drive current, and is a brightness adjustment device for the projection device.

8. A projection device, Light sources including colored light sources, Aperture and, Memory in which computer program instructions are stored, A projection apparatus comprising a processor that, when executing the computer program instructions, implements the brightness adjustment method for the projection apparatus described in any one of claims 1 to 6.

9. A computer-readable storage medium having a processor that stores computer program instructions for causing the processor to perform the brightness adjustment method of a projection apparatus according to any one of claims 1 to 6.

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