Brightness adjustment method, device, and storage medium for projection device

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] The present application relates to the field of optics, and in particular to a method, device and storage medium for adjusting brightness of a projection device. [Background technology]

[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 of different places is different, a brightness adjustment operation can be performed on the projection device to adjust the brightness of the projection screen projected from the projection device so that the brightness of the projection screen can meet the requirements.

[0003] However, in actual operation, after adjusting the brightness of the projection device, color shift occurs on the projection screen projected by the projection device, which reduces the display effect of the projection screen of the projection device. Summary of the Invention [Problem to be solved by the invention]

[0004] The embodiments of the present application provide a method, device, and storage medium for adjusting brightness of a projection device, which can improve the display effect of a screen projected from the projection device. [Means for solving the problem]

[0005] In a first aspect, an embodiment of the present application provides a brightness adjustment method for a projection device, the projection device including a light source and an aperture, the light source including a colored light source, the method including: determining, based on an acquired first brightness level, a target aperture diameter of the aperture corresponding to the first brightness level; determining, based on a predetermined first setting mapping relationship, a first driving current corresponding to the target aperture diameter, the first setting mapping relationship including a correspondence relationship between the aperture diameter and a driving current for driving the colored light source to achieve white balance on an image 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 driving current.

[0006] In a second aspect, an embodiment of the present application 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 including: an aperture diameter determination module configured to determine a target aperture diameter of the aperture corresponding to the first brightness level based on an acquired first brightness level; a drive current determination module configured to determine a first drive current corresponding to the target aperture diameter based on a predetermined first setting mapping relationship, the first setting mapping relationship including a correspondence relationship between the aperture diameter and a drive current for driving the colored light source to achieve white balance on an image projected from the projection device; and a control module configured to control the aperture diameter of the aperture to operate to the 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 application provides a projection device, the projection device comprising: a light source including a colored light source; an aperture; a memory having computer program instructions stored therein; and a processor that, when executing the computer program instructions, realizes the brightness adjustment method for a projection device of the first aspect.

[0008] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium having stored thereon computer program instructions that, when executed by a processor, implement the brightness adjustment method for a projection device of the first aspect. [Effects of the Invention]

[0009] The present disclosure provides a brightness adjustment method, device, and storage medium for a projection device, which includes determining a target aperture diameter to which an aperture of the projection device should be adjusted based on an acquired first brightness level, determining a first driving current corresponding to the target aperture diameter, which can achieve white balance on an image projected by the projection device, based on a first setting mapping relationship including a correspondence relationship between the aperture diameter and a driving current for driving a colored light source to achieve white balance on an image projected by 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 driving current, thereby allowing light emitted from the colored light source driven using the first driving current to pass through an aperture of the target aperture diameter to achieve white balance and ensure brightness corresponding to the first brightness level, thereby reducing or eliminating color shift on the image projected by the projection device and improving the display effect of the image projected by the projection device. [Brief explanation of the drawings]

[0010] [Figure 1] 3 is a flowchart of a brightness adjustment method for a projection device according to an embodiment of the present application. [Figure 2] 4 is a flowchart of a brightness adjustment method for a projection device according to another embodiment of the present application. [Figure 3] 10 is a flowchart of a brightness adjustment method for a projection device according to yet another embodiment of the present application. [Figure 4] 10 is a flowchart of a brightness adjustment method for a projection device according to yet another embodiment of the present application. [Figure 5] 1 is a schematic diagram illustrating a configuration of a brightness adjustment device for a projection device according to an embodiment of the present application. [Figure 6] FIG. 10 is a schematic diagram illustrating the configuration of a brightness adjustment device for a projection device according to another embodiment of the present invention. [Figure 7] FIG. 10 is a schematic diagram illustrating the configuration of a brightness adjustment device for a projection device according to still another embodiment of the present application. [Figure 8] 1 is a schematic diagram illustrating a configuration of a projection device according to an embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0011] In order to more clearly describe the technical solutions of the embodiments of the present application, the drawings used in the description of the embodiments of the present application are briefly introduced above, and those skilled in the art can obtain other related drawings based on these drawings without any creative efforts.

[0012] The following provides a detailed description of the features and exemplary embodiments of various aspects of the present application. In order to more clearly explain the objectives, technical solutions, and advantages of the present application, the present application will be described in detail with reference to the drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application. For those skilled in the art, the present application can be implemented without some of these specific details. The following description of the embodiments is intended to provide an example of the present application so as to provide a better understanding of the present application.

[0013]

[0003] 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 varies in different places, a brightness adjustment operation can be performed on the projection device to adjust the brightness of the projection screen so that the brightness of the projection screen can meet the requirements. However, in actual operation, after adjusting the brightness of the projection device, color shift occurs on the projection screen, which reduces the display effect of the projection screen.

[0014] For ease of explanation, a brief description of the structure of a portion of a projection device will be provided. The projection device includes a light source and an aperture. The light source can provide light to the projection device and can include colored light sources and white light sources. The colored light sources can provide colored light, for example, the colored light sources can include red (i.e., R) lamps, green (i.e., G) lamps, and blue (i.e., B) lamps. The white light source can provide white light, for example, the white light source can include a BP lamp. The aperture is located between the light source and the lens of the projection device. 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 size. If the projected screen is to be bright, the aperture diameter can be enlarged to increase the amount of light passing through. If the projected screen is to be dark, the aperture diameter can be reduced to decrease the amount of light passing through.

[0015] The present application provides a brightness adjustment method, device, and storage medium for a projection device, which can determine the aperture diameter of the diaphragm in the projection device according to the brightness level required for the projection device. In addition to adjusting the aperture diameter of the diaphragm, a driving current is also provided to drive a colored light source. Driving this light source can make the image projected by the projection device achieve white balance under the adjusted aperture diameter conditions, reduce or eliminate color shift, and improve the display effect of the projection screen of the projection device.

[0016] In a first aspect of the present application, a brightness adjustment method for a projection device is provided, which can be applied to a projection device. The relevant description of the projection device can be referred to above, and will not be repeated here. The brightness adjustment method for a projection device can be performed by a brightness adjustment device for a projection device, and is not limited thereto. Figure 1 is a flowchart of a brightness adjustment method for a projection device according to an embodiment of the present application. As shown in Figure 1, the brightness adjustment method for a projection device can include steps S101 to S103.

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

[0018] The first brightness level is the brightness level acquired by the projection device and intended to be adopted. The brightness level and the aperture diameter of the iris correspond to each other, and the higher the brightness level, the larger the aperture diameter becomes, and the brighter the screen projected from the projection device becomes. The target aperture diameter is the aperture diameter corresponding to the first brightness level.

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

[0020] The first preset mapping relationship includes a correspondence relationship between aperture diameter and a driving current for driving a colored light source to achieve white balance on an image projected from a projection device. When the aperture diameter changes, the amount of light passing through the aperture also changes, resulting in color shift after the colored light emitted from the colored light source passes through the aperture. White balance can reduce or eliminate color shift by restoring a white object to white. The first preset mapping relationship includes a correspondence relationship between aperture diameter and a driving current for driving a colored light source that can eliminate color shift. The first preset mapping relationship can be realized by a mapping table, a mapping curve, or other methods, and is not limited thereto. The first driving current is a driving current corresponding to a target aperture diameter within the first preset mapping relationship.

[0021] For example, Table 1 shows an example of the correspondence between aperture diameter and 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 diaphragm 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 of the diaphragm to expand or contract to a target aperture diameter and using the first driving current to drive the colored light source, the colored light emitted from the colored light source can be mixed and passed through the diaphragm, thereby reducing or eliminating color shift, thereby reducing or eliminating color shift on the screen projected from the projection device.

[0025] When 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 drive currents corresponding to each of the multiple colored light sources of different colors.

[0026] In an embodiment of the present application, a target aperture diameter to which the diaphragm of the projection device should be adjusted is determined based on the acquired first brightness level. A first setting mapping relationship including a correspondence relationship between the aperture diameter and the driving current that can drive the colored light source to achieve white balance on the screen projected from the projection device is determined to be a first driving current corresponding to the target aperture diameter that can achieve white balance on the screen projected from the projection device. The aperture diameter of the diaphragm is controlled to operate to the target aperture diameter, and the colored light source is driven using the first driving current, so that the light emitted from the colored light source driven using the first driving current passes through the diaphragm of the target aperture diameter to achieve white balance and ensure brightness corresponding to the first brightness level, thereby reducing or eliminating color shift on the screen projected from the projection device and improving the display effect of the screen projected from the projection device.

[0027] The brightness adjustment method for a projection device provided in the embodiment of the present application improves the display effect of the projection device and also provides good brightness stability of the projection screen. For example, Table 2 shows the brightness of the screen projected from the projection device in three tests using the brightness adjustment method for a projection device provided in the embodiment of the present application. [Table 2]

[0028] Here, the projection brightness in the first test includes the brightness of the screen projected from the projector under different brightness levels in the first test, the projection 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 projection 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 screens projected by different projector tests are relatively close, maintaining good stability.

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

[0030] In some other examples, the above-mentioned first brightness level may be obtained by matching with the ambient brightness. Specifically, the projection device can obtain the current ambient brightness, and the projection device has a correspondence relationship between the ambient brightness and the brightness level, which records the brightness level that matches with the ambient brightness. From this correspondence relationship, the brightness level that matches with the current ambient brightness, i.e., the first brightness level, can be found.

[0031] The maximum brightness level within the brightness levels corresponds to the maximum aperture diameter, the minimum brightness level within the brightness levels corresponds to the minimum aperture diameter, and the aperture diameter corresponding to a brightness level between the maximum and minimum brightness levels is greater than the minimum aperture diameter but less than the maximum aperture diameter. The aperture diameter may be expressed in the form of a percentage of the maximum aperture diameter or in the form of a multiple of the minimum aperture diameter. A control interface for controlling the aperture diameter of the aperture based on the brightness unit may be set. The aperture diameter corresponding to the maximum brightness level, the aperture diameter corresponding to the minimum brightness level, and the aperture diameter corresponding to a brightness level between the maximum and minimum brightness levels must ensure that the brightness of the screen projected from the projection device meets requirements.

[0032] In some embodiments, the projection device further includes an aperture motor, and the aperture motor can control the aperture diameter of the aperture to expand or contract. Figure 2 is a flowchart of a brightness adjustment method for a projection device according to another embodiment of the present application, and the difference between Figure 2 and Figure 1 is that step S101 in Figure 1 is specifically subdivided into step S1011 and step 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 of the aperture motor corresponding to the first brightness level is obtained based on the first brightness level.

[0034] The brightness level and the number of rotation steps of the aperture motor have a correspondence relationship, and different brightness levels correspond to different numbers of 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, a target aperture diameter of the aperture corresponding to the target number of rotation steps is determined based on the target number of rotation steps and the step number-aperture correspondence relationship.

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

[0037] In some examples, 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. 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 by the projector. 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 by the projector.

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

[0039] The fine adjustment rotation steps in Table 3 are the rotation steps in the fine adjustment method, and the coarse adjustment rotation steps are the rotation steps in the coarse adjustment method. In Table 3, the fine adjustment rotation steps = the coarse adjustment rotation steps × 32. As the brightness level increases, the fine adjustment rotation steps, the coarse adjustment rotation steps, and the aperture diameter also increase. When brightness levels are divided more precisely, the rotation steps and aperture diameters in Table 3 can be used to fit a curve that shows the correspondence between the step number and aperture. This curve can also be used to obtain aperture diameters corresponding to other rotation steps 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 driving the colored light source using the first driving current.

[0041] When the first brightness level is determined, the rotation of the aperture motor can be controlled to rotate the aperture motor to a target number of rotation steps, and the aperture motor drives the aperture, thereby expanding or reducing the aperture diameter to the target aperture diameter. In addition to controlling the rotation of the aperture motor, the colored light source is driven using the first driving current, causing the colored light emitted by the colored light source when driven with the first driving current to pass through the aperture of the target aperture diameter, thereby reducing or eliminating the color shift phenomenon of the colored light passing through the aperture, thereby reducing or eliminating the color shift of the image projected from the projection device and improving the display effect.

[0042] In some embodiments, the first setting mapping relationship may include a setting mapping function, which may represent a continuous correspondence relationship between aperture diameters and driving currents for driving colored light sources to achieve white balance on an image projected from the projection device. The setting mapping function may be constructed based on driving currents adjusted for different aperture diameters that can achieve white balance on an image projected from the projection device. The specific implementation of the setting mapping function is not limited herein. For example, the setting mapping function may be implemented as a smooth curve that represents the correspondence relationship between aperture diameters and driving currents for driving colored light sources to achieve white balance on an image projected from the projection device. Figure 3 is a flowchart of a brightness adjustment method for a projection device according to another embodiment of the present invention. The difference between Figure 3 and Figure 1 is that the brightness adjustment method for a projection device shown in Figure 3 may further include steps S104 to S107.

[0043] In step S104, a plurality of different aperture diameters are selected.

[0044] In some examples, a maximum aperture diameter, a minimum aperture diameter, and at least one aperture diameter located between the maximum aperture diameter and the minimum aperture diameter can be selected, and the specific value of the aperture diameter selected and the number of aperture diameters selected are not limited here.

[0045] In step S105, the driving current for driving the colored light source is adjusted under each aperture diameter condition until the screen projected from the projection device achieves white balance.

[0046] The diaphragm can be controlled to operate at each aperture size in sequence, for example, by controlling the number of rotation steps of the diaphragm motor, and the drive current for driving the colored light source can be adjusted under each aperture size condition, from a large value to a small value or from a small value to a large value, and when the screen projected from the projector achieves white balance, the drive current for the colored light source when the screen projected from the projector achieves white balance is recorded.

[0047] In step S106, a plurality of setting mapping points are obtained based on each aperture diameter and the driving current corresponding to each aperture diameter that allows the screen projected from the projection device to achieve white balance.

[0048] By taking the aperture diameter as the abscissa and the driving current that allows the image projected from the projection device to achieve white balance under that aperture diameter as the ordinate, a corresponding setting mapping point can be obtained. Alternatively, by taking the aperture diameter as the ordinate and the driving current that allows the image projected from the projection device to achieve white balance under that aperture diameter as the abscissa, a corresponding setting mapping point can be obtained. Each aperture diameter corresponds to one setting mapping point, and multiple aperture diameters can result in multiple setting mapping points.

[0049] In step S107, a plurality of set mapping points are fitted to obtain a set mapping function.

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

[0051] In some embodiments, after repeated use, the diaphragm in the projection device may be damaged and may become unable to expand or contract. In this case, the white light source in the projection device can be driven by a second driving current for driving the white light source, thereby ensuring the brightness of the screen projected from the projection device. Figure 4 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 4 and Figure 1 is that the brightness adjustment method for 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 the aperture motor, which returns feedback information after executing the command. This feedback information can represent the number of rotation steps of the aperture motor, thereby representing the current aperture diameter corresponding to the 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 will also be unable to rotate, i.e., the aperture motor will remain at a fixed number of rotation steps. Correspondingly, the feedback information represents the number of rotation steps at which the aperture motor has 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 equal to or larger than the predetermined aperture replacement diameter, a second setting mapping relationship corresponding to the current aperture diameter is determined, and a second driving 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 for determining whether the aperture needs to be replaced, and can be set based on the scene, demand, experience, etc., and is not limited here. If the aperture diameter of the aperture is equal to or greater than the aperture replacement diameter, the projection device can continue to be used without replacing the aperture. If the aperture diameter of the aperture is less than the aperture replacement diameter, the aperture needs to be replaced, and if it is not replaced, the projection device cannot continue to be used normally.

[0056] Each aperture diameter corresponds to one second setting mapping relationship, and different aperture diameters may correspond to different second setting mapping relationships. The second setting mapping relationship includes a correspondence relationship between brightness levels and driving currents for driving the white light source to achieve a predetermined standard required brightness for the image projected from the projection device. The standard required brightness may be a brightness level appropriate for the user's visual perception and may be set based on the scene, needs, experience, etc., and is not limited thereto. The second setting mapping relationship may be realized in the form of a mapping table, mapping curve, etc. The second brightness level is the brightness level that the projection device currently needs to adopt. The second brightness level may be obtained by manual adjustment input or by matching with the ambient brightness. For details, please refer to the description of the first brightness level in the above embodiment and will not be repeated here. The second driving current is the driving current for driving the white light source corresponding to the second brightness level in the second setting mapping relationship.

[0057] In some examples, a second setting mapping relationship may be established in advance. Multiple aperture diameters equal to or greater than the aperture replacement diameter are selected, and multiple brightness levels are selected under each aperture diameter. At each brightness level, the drive current for driving the white light source is adjusted until the brightness of the screen projected by the projector achieves the standard required brightness. The correspondence between the drive current and the brightness level at which the brightness of the screen projected by the projector achieves the standard required brightness is recorded. A second setting mapping relationship corresponding to each aperture diameter can be obtained by combining the correspondence between each brightness level at the same aperture diameter and the drive current that can achieve the standard required brightness of the screen projected by the projector. The second setting mapping relationship can be realized as a brightness-current mapping function. The brightness current set points obtained for the same aperture diameter are fitted to the brightness levels at the same aperture diameter and the drive current that can achieve the standard required brightness of the screen projected by the projector. A brightness-current mapping function representing the second setting mapping relationship can then be obtained. The brightness-current mapping function can then be used to calculate a second drive current corresponding to the second brightness level. 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 the second setting mapping relationship.

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

[0059] The white light emitted from the white light source driven by the second driving current passes through the damaged diaphragm, allowing the brightness of the screen projected by the projection device to reach the standard required brightness, thereby ensuring the brightness of the screen projected by the projection device, allowing the projection device to be used normally even if the diaphragm is damaged, and ensuring the display effect of the screen projected by the projection device even if the diaphragm is damaged.

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

[0061] If the aperture diameter is smaller than the replacement aperture diameter, it indicates that the aperture diameter of the damaged aperture is too small, and even if the driving current is adjusted, it will be difficult to make the brightness of the screen projected from the projection device achieve the standard required brightness. The prompt information is used to prompt the user to replace the aperture, and the prompt information can be displayed on the projected screen to prompt the user to replace the aperture.

[0062] In a second aspect of the present application, a brightness adjustment device for a projection device is provided, which is applicable to a projection device, and the relevant content of the projection device can be referred to the specific description in the above embodiments, and will not be described again 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, and as shown in Figure 5, a brightness adjustment device for a projection device 200 includes an aperture diameter determination module 201, a driving current determination module 202, and a control module 203.

[0063] The aperture diameter determination module 201 may be configured to determine, based on the obtained first brightness level, a target aperture diameter of the aperture corresponding to the 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 set mapping relationship.

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

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

[0067] In an embodiment of the present application, a target aperture diameter to which the diaphragm of the projection device should be adjusted is determined based on the acquired first brightness level, and a first driving current corresponding to the target aperture diameter, which can achieve white balance on the image projected by the projection device, is determined based on a first setting mapping relationship including a correspondence relationship between the aperture diameter and a driving current for driving the colored light source to achieve white balance on the image projected by the projection device, and the aperture diameter of the diaphragm is controlled to operate to the target aperture diameter, and the colored light source is driven using the first driving current, so that light emitted from the colored light source driven using the first driving current passes through the diaphragm of the target aperture diameter to achieve white balance and ensure brightness corresponding to the first brightness level, thereby reducing or eliminating color shift on the image projected by the projection device and improving the display effect of the image projected by the projection device.

[0068] In some examples, the first brightness level is obtained by manual adjustment input or by matching the ambient brightness, with a maximum brightness level within the brightness levels matching a maximum aperture and a minimum brightness level within the brightness levels matching a 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 application, and the difference between Figure 6 and Figure 5 is that the brightness adjustment device 200 for a projection device shown in Figure 6 includes an aperture selection module 204, an adjustment module 205, and a curve construction module 206.

[0070] The aperture selection module 204 may be configured to select between a number of different aperture sizes.

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

[0072] The curve construction module 206 may be configured to obtain a plurality of setting mapping points based on each aperture diameter and a driving current corresponding to each aperture diameter that causes the screen projected from the projection device to achieve white balance, and to fit the plurality of setting mapping points to obtain a setting mapping function.

[0073] In some embodiments, the projection apparatus further comprises an aperture motor.

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

[0075] In some examples, the brightness level is positively correlated with the number of rotational steps of the aperture motor, and the aperture size is positively correlated with the number of rotational steps of the aperture motor.

[0076] In some examples, the light source further includes a white light source. Fig. 7 is a schematic diagram showing the configuration of a brightness adjustment device of a projection device according to yet another embodiment of the present application, and the difference between Fig. 7 and Fig. 5 is that the brightness adjustment device 200 of the projection device further includes a lesion caliber determination module 207, a lesion 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 diameter of the damaged aperture based on the 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 diameter when the current aperture diameter is equal to or greater than a predetermined aperture replacement diameter, and determine a second drive current corresponding to the obtained second brightness level based on the second setting mapping relationship.

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

[0080] The control module 203 may be further configured to drive the white light source using a second driving voltage.

[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 when the current aperture diameter is less than a predetermined aperture replacement diameter. The prompt information is used to prompt the user to replace the aperture.

[0082] In a third aspect of the present application, there is further provided a projection apparatus. Fig. 8 is a schematic diagram showing the configuration of a projection apparatus according to an embodiment of the present application. As shown in Fig. 8, the projection apparatus 300 includes a light source 301, an aperture 302, a memory 303, and a processor 304.

[0083] The memory 303 stores computer program instructions that are executable by the processor 304 .

[0084] In some examples, the processor 304 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 embodiments of the present application.

[0085] The memory 303 may include read-only memory (ROM), random access memory (RAM), a magnetic disk device, an optical disk device, a flash memory device, an electrical, optical, or other physical / tangible memory storage device. Thus, typically, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software including computer-executable instructions that, when executed (e.g., by one or more processors), are operable to perform the operations described with reference to the brightness adjustment method for a projection device according to an embodiment of the present application.

[0086] The processor 304 is configured to read the executable program code stored in the memory 303, execute the computer program corresponding to the executable program code, and realize the brightness adjustment method for 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 FIG. 8, the memory 303, the processor 304, and the communication interface 305 can complete communication with each other via the bus 306.

[0088] The communication interface 305 is mainly used to enable communication between the modules, apparatuses, units and / or devices in the embodiment of the present application, and can also access input and / or output devices through the communication interface 305.

[0089] Bus 306 may include hardware, software, or both that couples the components of projection device 300 to one another. By way of example and not limitation, bus 306 may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a HyperTransport (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 suitable bus, or a combination of two or more thereof. Where appropriate, bus 306 may include one or more buses. Although the embodiments herein describe and illustrate a particular bus, the present application contemplates any suitable bus or interconnect.

[0090] In a fourth aspect of the present application, there is further provided a computer-readable storage medium having computer program instructions stored thereon, which, when executed by a processor, realizes the brightness adjustment method for a projection device in the above-mentioned embodiment and achieves the same technical effect, and to avoid repetition, will not be described again. Here, the computer-readable storage medium may include, but is not limited to, a non-transitory computer-readable storage medium such as a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0091] An embodiment of the present application provides a computer program product, and the instructions in the computer program product, when executed by a processor of an electronic device, cause the electronic device to perform the brightness adjustment method of the projection device in the above embodiment, so as to achieve the same technical effect, and to avoid repetition, they will not be described again here.

[0092] It should be clear that the embodiments in this specification are described step by step, and the same or similar parts between the embodiments can be referenced, and each embodiment focuses on the differences from other embodiments. For the device embodiments, projection device embodiments, computer-readable storage medium embodiments, and computer program product embodiments, the relevant parts can be referenced to the description of the method embodiments. The present application is not limited to the specific steps and structures described above and shown in the drawings. Those skilled in the art may make various changes, modifications, additions, or changes in the order of steps after understanding the gist of the present application. Also, for the sake of brevity, detailed descriptions of known method technologies are omitted here.

[0093] The above describes various aspects of the present application with reference to flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the present application. It should be understood that each block of the flowcharts and / or block diagrams, and combinations of blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions are executed by the processor of the computer or other programmable data processing apparatus to implement the functions / operations specified in one or more blocks of the flowcharts and / or block diagrams. Such processors may include, but are not limited to, a general-purpose computer, a special-purpose computer, an application-specific processor, or a field-programmable logic array. It should also be understood that each block of the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented by dedicated hardware that performs the specified functions or operations, or by a combination of dedicated hardware and computer instructions.

[0094] Those skilled in the art should understand that the above embodiments are illustrative and not restrictive. 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 studying the drawings, the description, and the claims. In the claims, the term "comprises" does not exclude other devices or steps, the quantifier "a" does not exclude a plurality, and the terms "first" and "second" are used to denote names but do not denote any particular order. Any reference signs in the claims should not be interpreted as limiting the scope of protection. The functions of multiple parts described in the claims can be realized by a single hardware or software module. The fact that certain technical features are recited in different dependent claims does not mean that these technical features cannot be combined to achieve beneficial effects.

Claims

1. A brightness adjustment method for a projection device, which is applied to a projection device, the projection device includes a light source and an aperture, the light source includes a colored light source, and the brightness adjustment method for the projection device includes: determining a target aperture diameter of the diaphragm corresponding to the first brightness level based on the acquired first brightness level; determining a first drive current corresponding to the target aperture diameter based on a predetermined first setting mapping relationship, the first setting mapping relationship including a correspondence relationship between an aperture diameter and a drive current for driving the colored light source to achieve white balance on an image projected from the projection device; controlling the aperture diameter of the diaphragm to operate it to the target aperture diameter, and driving the colored light source using the first driving current.

2. the first configuration mapping relationship includes a configuration mapping function; Before determining a first driving current corresponding to the target aperture diameter based on the predetermined first setting mapping relationship, the brightness adjustment method for the projection apparatus includes: Selecting between different aperture diameters; adjusting a driving current for driving the colored light source until the screen projected from the projection device achieves white balance under each aperture diameter condition; Obtaining a plurality of setting mapping points based on each aperture diameter and a driving current corresponding to each aperture diameter that allows the screen projected from the projection device to achieve white balance; fitting a plurality of the set mapping points to obtain the set mapping function. The brightness adjustment method for a projection device according to claim 1 .

3. the projection device further includes an aperture motor; determining a target aperture diameter of the diaphragm corresponding to the first brightness level based on the acquired first brightness level; obtaining a target number of rotation steps of the aperture motor corresponding to the first brightness level based on the first brightness level; determining a target aperture diameter of the diaphragm corresponding to the target number of rotation steps based on the target number of rotation steps and a step number / aperture correspondence relationship, wherein the step number / aperture correspondence relationship includes a correspondence relationship between the number of rotation steps of the diaphragm motor and an aperture diameter of the diaphragm; The brightness adjustment method for 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. The brightness adjustment method for a projection device according to claim 3.

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

6. The light source further includes a white light source, and the brightness adjusting method of the projection device includes: If the aperture is damaged, determining a current aperture diameter of the damaged aperture based on feedback information; If the current aperture diameter is equal to or larger than a predetermined aperture replacement diameter, determining a second setting mapping relationship corresponding to the current aperture diameter, and determining a second driving current corresponding to the acquired second brightness level based on the second setting mapping relationship, wherein the second setting mapping relationship includes a correspondence relationship between a brightness level and a driving current for driving the white light source to make the brightness of the screen projected from the projection device reach a predetermined standard required brightness; and driving the white light source using the second driving voltage. The brightness adjustment method for a projection device according to claim 1 .

7. The brightness adjustment method for the projection device includes: and if the current aperture diameter is less than a predetermined aperture replacement diameter, generating prompt information and controlling the projection device to project a screen including the prompt information, the prompt information being used to prompt the user to replace the aperture. The brightness adjusting method for a projection device according to claim 6.

8. A brightness adjustment device for a projection device, which is applied to a projection device, the projection device includes a light source and an aperture, the light source includes a colored light source, and the brightness adjustment device for the projection device includes: an aperture diameter determination module configured to determine a target aperture diameter of the aperture corresponding to the first brightness level based on the acquired first brightness level; a drive current determination module configured to determine a first drive current corresponding to the target aperture diameter based on a predetermined first setting mapping relationship, the first setting mapping relationship including a correspondence relationship between an aperture diameter and a drive current for driving the colored light source to achieve white balance on an image projected from the projection device; and a control module configured to control the aperture diameter of the diaphragm to operate it to the target aperture diameter and to drive the colored light source using the first drive current.

9. 1. A projection device, comprising: a light source including a colored light source; Aperture and a memory having computer program instructions stored therein; A processor that, when executing the computer program instructions, implements the method for adjusting brightness of a projection device according to any one of claims 1 to 7.

10. A computer-readable storage medium having stored thereon computer program instructions for causing a processor to execute the method for adjusting brightness of a projection device according to any one of claims 1 to 7.

Images