CN113485067A

CN113485067A - Brightness adjusting method and device, projection equipment and computer readable storage medium

Info

Publication number: CN113485067A
Application number: CN202111050322.3A
Authority: CN
Inventors: 常征; 杨广松; 付啸天; 王骁逸; 张聪; 胡震宇
Original assignee: Shenzhen Huole Science and Technology Development Co Ltd
Current assignee: Shenzhen Huole Science and Technology Development Co Ltd
Priority date: 2021-09-08
Filing date: 2021-09-08
Publication date: 2021-10-08
Anticipated expiration: 2041-09-08
Also published as: CN113485067B

Abstract

The present disclosure provides a brightness adjustment method, apparatus, projection device and computer readable storage medium; the method mainly comprises the steps of determining a fusion degree parameter by obtaining background brightness of a background area in a projection surface and first projection brightness of the projection area, then determining a target brightness visual difference in a brightness visual difference curve according to the background brightness of the background area, and finally adjusting the brightness of the projection area according to the fusion degree parameter and the target brightness visual difference. The brightness of the projection area is adjusted through the fusion degree parameter and the target brightness visual difference, so that the split feeling of the background area and the projection area in the projection surface is eliminated, the reality is improved, and the influence on the projection image quality caused by excessive brightness adjustment is reduced.

Description

Brightness adjusting method and device, projection equipment and computer readable storage medium

Technical Field

The present disclosure relates to the field of projection display technologies, and in particular, to a brightness adjustment method and apparatus, a projection device, and a computer-readable storage medium.

Background

In current projection displays, the projection area and the background area in the projection surface often have a split feeling and poor reality, so that the viewing experience of the user is poor.

Disclosure of Invention

The disclosure provides a brightness adjusting method, a brightness adjusting device and a projection device, which are used for eliminating the splitting sense of a projection area and a background area in a projection surface, improving the reality sense and reducing the technical problem of influence on the projection image quality caused by excessive brightness adjustment.

In order to solve the technical problem, the present disclosure provides the following technical solutions:

the present disclosure provides a brightness adjusting method, which is suitable for a projection device, a projection surface of the projection device includes a projection area and a background area, and the method includes:

acquiring background brightness of the background area and first projection brightness of the projection area;

determining the target brightness visual difference according to a preset brightness visual difference curve and the background brightness of the background area;

determining a fusion degree parameter according to the first projection brightness of the projection area and the background brightness of the background area;

and adjusting the brightness of the projection area according to the fusion degree parameter and the target brightness visual difference.

Meanwhile, the present disclosure provides a brightness adjusting device, which is suitable for a projection apparatus, wherein a projection surface of the projection apparatus includes a projection area and a background area, and the device includes:

the brightness acquisition module is used for acquiring the background brightness of the background area and the first projection brightness of the projection area;

the visual difference determining module is used for determining the visual difference of the target brightness according to a preset brightness visual difference curve and the background brightness of the background area;

the parameter determining module is used for determining a fusion degree parameter according to the first projection brightness of the projection area and the background brightness of the background area;

and the adjusting module is used for adjusting the brightness of the projection area according to the fusion degree parameter and the target brightness visual difference.

Optionally, the brightness acquiring module includes:

the imaging area acquisition module is used for acquiring an imaging area in the field angle of the projection equipment;

the coordinate determination module is used for determining the coordinates of the projection area in the imaging area according to the distance parameter of the projection equipment from the projection surface;

the background area determining module is used for determining the background area according to the coordinates of the imaging area and the projection area in the imaging area;

the background gray level determining module is used for determining the background gray level of the background area according to a gray level calculation mode;

and the background brightness determining module is used for determining the background brightness of the background area according to the mapping relation between the gray scale and the brightness.

Optionally, the brightness acquiring module includes:

the first acquisition module is used for acquiring a dark field brightness parameter of the projection equipment, a gain parameter of the projection surface and the area of the projection area, wherein the projection area comprises a content area and a non-content area;

the first illumination determination module is used for determining first illumination of the non-content area according to the dark field brightness parameter and the area of the projection area;

and the first projection brightness determining module is used for determining the first projection brightness of the non-content area according to the first illumination and the gain parameter.

Optionally, the first obtaining module includes:

the gray scale acquisition module is used for acquiring a first gray scale and a second gray scale of an imaging area in the field angle of the projection equipment, wherein the first gray scale is a gray scale value corresponding to a full white picture in the imaging area in the field angle of the projection equipment, and the second gray scale is a gray scale value corresponding to a full black picture in the imaging area in the field angle of the projection equipment;

the brightness determining module is used for determining first brightness corresponding to the first gray scale and second brightness corresponding to the second gray scale according to the mapping relation between the gray scale and the brightness;

the second acquisition module is used for acquiring the bright field brightness parameter of the projection equipment and the area of the projection area;

the second illumination determination module is used for determining second illumination of the projection surface according to the bright field brightness parameter and the area of the projection area;

and the gain data determining module is used for determining a gain parameter of the projection surface according to the second illumination, the first brightness and the second brightness.

Optionally, the adjustment module comprises:

the threshold value acquisition module is used for acquiring an adjustment threshold value;

the instruction generating module is used for generating an automatic adjusting instruction when the fusion degree parameter is larger than or equal to the target brightness visual difference;

the parameter generation module is used for adjusting the brightness of the projection area according to the automatic adjustment instruction and generating an adjusted fusion degree parameter;

and the instruction execution module is used for generating and executing an adjustment stopping instruction when the adjusted fusion degree parameter is in an interval formed by the adjustment threshold and the target brightness visual difference.

Optionally, the threshold obtaining module includes:

the third acquisition module is used for acquiring dark field brightness, bright field brightness and background brightness of the background area of the projection equipment;

and the threshold value determining module is used for determining an adjusting threshold value according to the dark field brightness, the bright field brightness and the background brightness of the background area.

Optionally, the threshold obtaining module includes:

the instruction receiving module is used for receiving a threshold setting instruction from a user;

and the threshold setting module is used for setting an adjusting threshold according to the threshold setting instruction.

Furthermore, the present disclosure provides a projection device comprising a processor and a memory, the memory being configured to store a computer program, the processor being configured to execute the computer program in the memory to perform the steps of the brightness adjustment method described above.

Furthermore, the present disclosure provides a computer-readable storage medium storing a plurality of instructions adapted to be loaded by a processor to perform the steps of the above-mentioned brightness adjustment method.

Has the advantages that: the disclosure provides a brightness adjusting method, a brightness adjusting device, a projection device and a computer readable storage medium; the method comprises the steps of firstly obtaining background brightness of a background area and first projection brightness of the projection area in a projection surface, wherein the projection surface comprises the projection area and the background area, then determining target brightness visual difference according to the background brightness of the background area and a preset brightness visual difference curve, then determining fusion degree parameters according to the first projection brightness of the projection area and the background brightness of the background area, and finally adjusting the brightness of the projection area according to the fusion degree parameters and the target brightness visual difference. The fusion degree parameter is determined mainly through the background brightness of the background area in the projection surface and the first projection brightness of the projection area, and the brightness of the projection area is adjusted through comparing the fusion degree parameter with the target brightness visual difference, so that the brightness difference between the first projection brightness of the projection area and the background brightness of the background area in the projection surface meets the preset condition (namely is smaller than the minimum perceivable difference of human eye brightness), the split feeling between the projection area and the background area in the projection surface is eliminated, the sense of reality is improved, and meanwhile, the influence on the projection image quality caused by excessive brightness adjustment can be reduced.

Drawings

The technical solutions and other advantages of the present disclosure will become apparent from the following detailed description of specific embodiments of the present disclosure, which is to be read in connection with the accompanying drawings.

Fig. 1 is a cross-sectional view of a projection device provided by an embodiment of the present disclosure.

Fig. 2 is a perspective view of a projection lens provided in an embodiment of the present disclosure.

Fig. 3 is an enlarged view of the projected light effect device shown in fig. 1 of the present disclosure at a.

Fig. 4 is a schematic structural diagram of a light effect assembly and a connecting member provided in a first embodiment of the present disclosure.

Fig. 5 is a schematic structural diagram of a light effect assembly and a connecting member provided by a second embodiment of the present disclosure.

Fig. 6 is a schematic structural diagram of a light effect assembly provided by a third embodiment of the present disclosure.

Fig. 7 is a schematic structural diagram of a light effect assembly and a connecting member according to a fourth embodiment of the present disclosure.

Fig. 8 is a schematic structural diagram of a light effect assembly provided by a fifth embodiment of the present disclosure.

Fig. 9 is a schematic structural diagram of a light effect assembly provided by a sixth embodiment of the present disclosure.

Fig. 10 is a schematic structural diagram of a light shielding plate according to a sixth embodiment of the present disclosure.

Fig. 11 is a schematic structural diagram of a light effect plate provided by a sixth embodiment of the present disclosure.

Fig. 12 is a schematic structural view of a light effect assembly and a connecting member provided in a seventh embodiment of the present disclosure.

Fig. 13 is a schematic structural diagram of a light effect assembly according to an eighth embodiment of the present disclosure.

Fig. 14 is a schematic structural diagram of a light effect assembly provided by a ninth embodiment of the present disclosure.

Fig. 15 is a schematic structural diagram of a light shielding plate according to a ninth embodiment of the present disclosure.

Fig. 16 is a schematic structural diagram of a light effect plate provided in a ninth embodiment of the present disclosure.

Fig. 17 is a schematic structural diagram of a light shielding plate according to a tenth embodiment of the present disclosure.

Fig. 18 is a schematic structural diagram of a light effect panel provided in a tenth embodiment of the present disclosure.

Fig. 19 to 21 are schematic diagrams of a motion state of a light shielding plate according to a tenth embodiment of the present disclosure.

Fig. 22 is a schematic partial structure diagram of a projection light effect device provided by the embodiment of the disclosure.

Fig. 23 is a schematic system architecture diagram of a brightness adjustment system provided in the embodiment of the present disclosure.

Fig. 24 is a schematic flowchart of a brightness adjustment method according to an embodiment of the present disclosure.

Fig. 25 is a schematic region diagram of a projection surface provided in an embodiment of the disclosure.

Fig. 26 is a schematic region diagram of another projection surface provided in the embodiments of the present disclosure.

Fig. 27 is a schematic diagram of a visual difference curve provided by an embodiment of the present disclosure.

Fig. 28 is a schematic structural diagram of a brightness adjustment device according to an embodiment of the present disclosure.

Description of reference numerals:

10. a light source; 20. a projection lens; 21. a lens assembly; 22. a projection light effect device; 100. a housing; 300. a light effect component; 400. a connecting member; 101. a light outlet; 310. a visor; 320. a light effect panel; 330. a fixing plate; 311. an imaging aperture; 301. a chute; 410. a first connecting member; 420. a second connecting member; 430. a third connecting member; 401. a light-transmitting structure; 411. a slider; 432. a connecting shaft; 110. a server; 112. a projection device; 113. and controlling the terminal.

Detailed Description

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprise" and "have," and any variations thereof, are intended to cover non-exclusive inclusions, such that a process, method, system, article, or apparatus that comprises a list of steps or modules is not necessarily limited to those steps or modules expressly listed, but may include other steps or modules not expressly listed or inherent to such process, method, article, or apparatus, such that the division of modules presented in the disclosed embodiments is merely a logical division and may be implemented in a practical application in a different manner, such that multiple modules may be combined or integrated into another system or some features may be omitted or not implemented, and such that couplings or direct couplings or communicative connections between modules shown or discussed may be through interfaces, indirect couplings or communicative connections between modules may be electrical or the like, the embodiments of the present disclosure are not limited. Moreover, the modules or sub-modules described as separate components may or may not be physically separated, may or may not be physical modules, or may be distributed in a plurality of circuit modules, and some or all of the modules may be selected according to actual needs to achieve the purpose of the embodiments of the present disclosure.

In the embodiment of the present disclosure, the projection surface represents a display surface that can be used for displaying projection content, such as a wall surface, a projection curtain, and the like.

In the embodiment of the present disclosure, the background brightness of the background area in the projection surface represents the brightness of the projection surface (for example, the brightness of the wall surface, the brightness of the projection curtain, etc.) in the current environment, and the step of obtaining the background brightness of the background area will be described in detail later.

In the embodiment of the present disclosure, the first projected luminance of the non-content area refers to the luminance of an area (i.e., the non-content area B area in fig. 26) in the projection area where no content is displayed. Wherein the projection area is an area composed of a content area a and a non-content area B as shown in fig. 26. The non-content area brightness is generally obtained by applying a pure black brightness to the non-content area to obtain the black field brightness, and the specific obtaining step will be described in detail later.

In the embodiment of the present disclosure, the preset luminance visual difference curve is a curve for representing a relationship between a minimum perceivable difference of human eye luminance and background luminance of a background region in a normal case. It is generally considered that the background luminance (L) is less than 10cd/m²(candela/m squared), Δ L/L = kL, i.e. the minimum perceivable difference in human eye luminance (Δ L) and the square of the background luminance (L) are linear; at background luminance (L) of more than 10cd/m²(candela/sq m) less than 300cd/m²(candela/m squared), Δ L/L = k, i.e. the just noticeable difference in human eye luminance is linear with background luminance. Wherein the minimum perceived difference of human eye brightness is the minimum value of the brightness difference perceived by human eyes.

In the embodiment of the disclosure, the fusion degree parameter represents the consistency degree of the brightness, the chromaticity and the like of the projection area and the background area in the projection surface. Can be embodied as DeltaL '/L, where DeltaL' is a first projected luminance (L) of the projected area₀) And the difference brightness with the background brightness (L) of the background area, wherein L is the background brightness of the background area. According to the first projection brightness (L) of the projection area under the actual condition₀) And background brightness (L), making a curve of the fusion degree parameter (delta L'/L) and the background brightness (L), then comparing the curve with a preset brightness visual difference curve, and if the fusion degree parameter curve is below the preset brightness visual difference curve, indicating that the human eye cannot perceive the first projection brightness (L) of the projection area₀) The difference with the background brightness (L) is obtained, and the fusion degree parameter is high; otherwise, the fusion degree parameter is low.

The disclosure provides a brightness adjustment method, a brightness adjustment device, a projection device and a computer readable storage medium.

Referring to fig. 23, fig. 23 is a schematic diagram of a system architecture of a brightness adjustment system provided in the present disclosure, as shown in fig. 23, the brightness adjustment system at least includes a server 110, a projection device 112, and a control terminal 113, where:

communication links are arranged among the server 110, the projection device 112 and the control terminal 113 so as to realize information interaction. The type of communication link may include a wired, wireless communication link, or fiber optic cable, etc., and the disclosure is not limited thereto.

The server 110 may be an independent server, or a server network or a server cluster composed of servers; for example, the servers described in the present disclosure include, but are not limited to, computers, network hosts, database servers, storage servers, and Cloud servers consisting of an application server or a plurality of servers, wherein the Cloud servers are composed of a large number of computers or network servers based on Cloud Computing (Cloud Computing).

The projection device 112 is a device that can project an image or video onto a projection surface, and can be connected to a computer, a mobile phone, a game machine, a DV, or the like through different interfaces or networks to play a corresponding video or image signal, wherein the projection device 112 can be a projector, a micro-projector, or other device with a projection function.

The control terminal 113 may be a smart phone, a tablet computer, a notebook computer, a wearable device, a remote controller, or other devices capable of sending signals.

The present disclosure provides a brightness adjustment system, which includes a server, a projection device, and a control terminal. Specifically, the projection device 112 obtains the background brightness (L) of the background area and the first projection brightness (L) of the projection area in the projection surface through a sensor (e.g., a light sensor) and production parameters, etc. of the projection device₀) Then, a target luminance visual difference is determined according to the background luminance (L) of the background region and a preset luminance visual difference curve stored in the server 110, and then a first projection luminance (L) of the projection region is determined₀) And determining a fusion degree parameter according to the background brightness (L) of the background area, and finally adjusting the brightness of the projection area according to the fusion degree parameter and the target brightness visual difference, wherein the adjustment of the brightness of the projection area can be performed by the projection equipment 112 automatically according to the brightness of a bright field, the brightness of a dark field and the background brightness of the background area in the projection plane, or performed by a user by launching a related adjustment instruction through the control terminal 113. The brightness of the projection image in the background area under different background brightness is adjusted through the brightness adjusting system, and particularly, feathering is started when the background brightness is low (namely, a technology for eliminating the splitting sense between the playing area and the projection surface by changing the outline and the background color of the projection image and the change trend of the edge brightness of the outline) so as to improve the visual effect and improve the sense of reality and the watching experience of a user; bright in the backgroundWhen the intensity is high, the feathering is closed, and the influence on the projection image quality caused by the brightness reduction caused by the opening of the feathering is avoided.

It should be noted that the system architecture diagram shown in fig. 23 is only an example, and the server, the terminal, the device and the scenario described in the embodiment of the present disclosure are for more clearly illustrating the technical solution of the embodiment of the present disclosure, and do not form a limitation on the technical solution provided in the embodiment of the present disclosure, and as a person having ordinary skill in the art knows that along with the evolution of the system and the occurrence of a new service scenario, the technical solution provided in the embodiment of the present disclosure is also applicable to similar technical problems. The following are detailed below. It should be noted that the following description of the embodiments is not intended to limit the preferred order of the embodiments.

With reference to fig. 24, fig. 24 is a schematic flow chart of a brightness adjustment method provided by the present disclosure, where the brightness adjustment method provided by the present disclosure is applied to a projection device, a projection surface of the projection device includes a projection area and a background area, the projection area includes a content area and a non-content area, and as shown in fig. 24, the brightness adjustment method at least includes the following steps:

step 201: the background brightness of the background area and the first projection brightness of the projection area are obtained.

As shown in fig. 25, fig. 25 is a schematic region diagram of a projection surface, in which a projection region D and a background region S surrounding the projection region D constitute the projection surface (which may be a wall surface, a projection curtain, or the like, which may be used to display projection contents, and in other embodiments, the background region S may not surround the projection region D); in the current projection display, not all the projection content completely occupies the projection area, the projection area includes a content area and a non-content area, sometimes, the content area is only a part of the projection area, specifically, as shown in fig. 26, fig. 26 shows a schematic area diagram of another projection surface, which shows a background area S, a camera imaging area C, a non-content area B, and a content area a, where the non-content area B is an area of the projection device where the projection content is not displayed (for example, when watching a movie, black edges of upper and lower parts of the movie content are the non-content areas); the content area a is an area of the projection apparatus where the projected content is displayed.

In one embodiment, the background brightness (L) of the background area S in the projection plane may be obtained by a sensor of the projection apparatus, or may be obtained by a corresponding calculation. Specifically, the step of acquiring the background brightness (L) of the background area S in the projection plane includes:

step 2011: acquiring an imaging area in the field angle of the projection equipment;

step 2012: determining the coordinates of the projection area in the imaging area according to the distance parameter of the projection equipment from the projection surface;

step 2013: determining the background area according to the coordinates of the imaging area and the projection area in the imaging area;

step 2014: determining the background gray scale of the background area according to a gray scale calculation mode;

step 2015: and determining the background brightness of the background area according to the mapping relation between the gray scale and the brightness.

The imaging area within the field angle of the projection apparatus is a C-area picture (as shown in fig. 26) within the FOV acquired by the camera of the projection apparatus in real time during normal use. The camera imaging area C is an area formed in a field angle (FOV) of a camera of the projection apparatus, which is an angle range in which the camera can receive an image in a general environment and is also referred to as a field of view, and may be smaller than the background area S, larger than the background area S, or may coincide with the background area S, and fig. 26 only shows a case where the camera imaging area C is smaller than the projection plane S. It should be noted that the brightness of the camera imaging area C is the brightness of the hollow area obtained by subtracting the non-content area B from the camera imaging area C.

The projection device stores the measured distance parameters (including the position coordinates of the projection area in the camera imaging area C) in a local server through a time-of-flight sensor (TOF sensor), and when the distance parameters are needed, the projection device can read the relevant parameters from the time-of-flight sensor. Specifically, a time-of-flight sensor (TOF sensor) obtains a distance parameter of an object by continuously transmitting light pulses to the object (i.e., a projection area composed of a content area a and a non-content area B in fig. 26), and then receiving light returning from the object with the sensor, by detecting the time of flight (round trip) of these transmitted and received light pulses. Because TOF sensor has characteristics such as real-time sensing, measurement accuracy and error are fixed, interference killing feature are strong, therefore this disclosure adopts TOF sensor to obtain the mode of distance parameter and has guaranteed distance parameter's accuracy.

After the coordinates of the projection area in the camera imaging area C are obtained, the projection area is cut off from the camera imaging area C (i.e., a hollow area is left), then the gray value of the hollow area (i.e., the background gray of the background area) is obtained through gray level calculation and the like, and finally the brightness value corresponding to the gray value of the central control area, i.e., the background brightness of the background area, is obtained by referring to the gray value and brightness value mapping table. It should be noted that the mapping table records the mapping relationship between the luminance value and the gray value of the camera of the projection apparatus under the corresponding exposure time, ISO and f-number, so that the background luminance L corresponding to the background area can be determined according to the mapping table and the gray value of the background area.

In one embodiment, the first projected brightness (L) of the projected area is less than the background area if the content area does not fully occupy the background area₀) The method can be obtained through the projection brightness of the non-content area, and is mainly obtained through calculation based on dark field brightness data recorded during production of projection equipment and the area of the projection area, and the method comprises the following specific steps:

step 2015: acquiring a dark field brightness parameter of the projection equipment, a gain parameter of the projection surface and the area of a projection area, wherein the projection area comprises a content area and a non-content area;

step 2016: determining a first illumination of the non-content area according to the dark field brightness parameter and the area of the projection area;

step 2017: and determining a first projection brightness of the non-content area according to the first illumination and the gain parameter.

Wherein, projectingThe dark field brightness parameter of the device is the brightness data M of the black picture recorded during production of the projection device₀(i.e., the brightness when a pure black picture is projected onto the projection area D by the projection device); the gain parameter G of the projection plane is calculated based on the brightness value, the bright-field brightness and the area of the projection area when the projection device projects the full white picture and the full black picture, and the detailed obtaining steps will be described below; the area S of the projection region (i.e., the projection region D shown in FIG. 25)₀The projection area is calculated by a camera or a TOF sensor of the projection equipment and by a method of an automatic trapezoidal correction function in the projection equipment, specifically, the projection distance from a projection area to the projection equipment can be obtained by the camera or the TOF sensor, and the focal length and the like can be determined by the method of the automatic trapezoidal correction function, so that the area of the projection area is calculated.

Luminance data M of black picture in which non-content area is determined₀(i.e., dark field luminance parameter M)₀) And the area S of the projection area₀Then, the first illuminance E of the black picture of the non-content area on the projection surface can be calculated according to formula 1₀ Equation 1 is:

(formula 1)

The illumination intensity is short for illumination intensity, and refers to the luminous flux of the received visible light per unit area, and is used for indicating the intensity of illumination and the amount of illumination degree of the surface area of the object.

Therefore, the first illuminance E of the non-content area can be obtained from the above calculation₀Calculating a first projection brightness L of the non-content area by using the gain parameter G of the projection surface and a formula 2₀Equation 2 is:

(formula 2)

In one embodiment, to calculate the first projected luminance L of the non-content region₀Increase in the required acquisition of projection surfaceGain parameter G is calculated based on the brightness value, bright field brightness and area of projection area when the projection equipment projects full white picture and full black picture, and the method specifically comprises the following steps:

step 20151: acquiring a first gray scale and a second gray scale of the imaging area in the field angle of the projection equipment, wherein the first gray scale is a gray scale value corresponding to a full white picture in the imaging area in the field angle of the projection equipment, and the second gray scale is a gray scale value corresponding to a full black picture in the imaging area in the field angle of the projection equipment;

step 20152: determining first brightness corresponding to the first gray scale and second brightness corresponding to the second gray scale according to a mapping relation between the gray scale and the brightness;

step 20153: acquiring a bright field brightness parameter of the projection equipment and the area of the projection area;

step 20154: determining a second illumination of the projection surface according to the bright field brightness parameter and the area of the projection area;

step 20155: and determining a gain parameter of the projection surface according to the second illumination, the first brightness and the second brightness.

Specifically, before acquiring the first gray scale and the second gray scale of the imaging area C within the field angle of the projection apparatus, the projection apparatus is turned on, and a full white picture and a full black picture are projected on the projection plane in sequence by the projection apparatus, and then the gray scale value Y corresponding to the full white picture of the imaging area C of the camera within the field angle of the projection apparatus is recorded by the camera of the projection apparatus₁(i.e., first gray level) and gray level value Y corresponding to a full black picture₂(i.e., the second gray scale).

Then, the gray value Y is obtained by referring to a mapping table in which gray values and brightness values are recorded₁(i.e., first gray scale) corresponding luminance value L₁(i.e., first luminance) and gray value Y₂(i.e., second gray scale) corresponding to the luminance value L₂(i.e., the second brightness). It should be noted that the mapping table records the mapping relationship between the brightness value and the gray value of the camera of the projection device under the corresponding exposure time, ISO and f-number, and therefore, the mapping table is used to map the brightness value and the gray value of the camera of the projection device under the corresponding exposure time, ISO and f-numberAnd the gray value of the background area, the brightness value corresponding to a certain gray value can be uniquely determined.

Wherein, the bright field brightness parameter of the projection equipment is the brightness data M of the white picture in the projection area recorded during the production of the projection equipment₁(i.e., the brightness data M of the content area A in the projection area D₁). Specifically, the luminance data M of the white picture₁Calculated according to the Ames lumen standard (a standard for calculating the brightness of a projector), and calculating the brightness data M of a white picture₁In the method, the brightness of a certain point in the white picture is not used for representing the brightness of the projection area, but an average brightness calculation method is adopted for calculating the average brightness value of the white picture.

Similarly, the area S of the projection region (i.e., the projection region D shown in FIG. 25)₀The projection area is calculated by a camera or a TOF sensor of the projection equipment and by a method of an automatic trapezoidal correction function in the projection equipment, specifically, the projection distance from a projection area to the projection equipment can be obtained by the camera or the TOF sensor, and the focal length and the like can be determined by the method of the automatic trapezoidal correction function, so that the area of the projection area is calculated.

When the brightness data M of the white picture is determined₁(i.e., the bright field luminance parameter M₁) And the area S of the projection area₀Then, the second illumination E of the projection surface on the projection surface can be calculated according to the formula 3₁Equation 3 is:

(formula 3)

Therefore, the second illuminance E of the projection surface can be obtained according to the above calculation₁First brightness (brightness value L)₁) Second brightness (brightness value L)₂) And calculating to obtain a gain parameter G of the projection plane by using a formula 4, wherein the formula 4 is as follows:

(formula 4)

In one embodiment, if the content area occupies the entire projection area, then a first projected brightness (L) of the projection area₀) Can be directly obtained by the projected brightness of the content area (i.e., the projection area).

Step 202: and determining the target brightness visual difference according to a preset brightness visual difference curve and the background brightness of the background area.

It is understood that the perceived minimum difference of human eye brightness is directly related to the background brightness, and the preset brightness difference curve is a curve for representing the relationship between the perceived minimum difference of human eye brightness and the background brightness of the background area under normal conditions. FIG. 27 is a schematic view of a visual difference curve provided for the present disclosure, wherein the background luminance (L) is less than 10cd/m²(candela/m) weak luminance, curve y = jx^kWherein x represents background brightness (L), y represents visual difference (Δ L/L, i.e. the ratio of minimum perceivable difference of human eyes to background brightness), j and k are constants, where j ranges from 0.0341 to 0.0622, k ranges from-0.813 to-0.162, and it can be known that the ratio of minimum perceivable difference of human eyes to background brightness shows a monotonous decreasing trend along with the increase of brightness, for example, j is 0.0341, k is-0.813, i.e. the curve is y =0.0341x^-0.813Taking j as 0.0419 and k as-0.635, i.e. curve y =0.0419x^-0.635Let j be 0.0528 and k be-0.492, i.e., curve y =0.0528x^-0.492Let j be 0.0622 and k be-0.162, i.e. curve y =0.0622x^-0.162(ii) a At a background luminance (L) of more than 10cd/m²(candela/sq m) less than 300cd/m²(candela/m) medium luminance, the curve is y = m, m is a constant, which ranges from 0.003 to 0.042, for example, m is 0.003, y =0.003, m is 0.014, y =0.014, m is 0.017, y =0.017, m is 0.025, y =0.025, m is 0.029, y =0.029, m is 0.042, y =0.042, i.e., the ratio of the minimum perceivable difference of the human eye to the background luminance (Δ L/L) is about m, and weber's law is observed, where x isRepresents the background brightness and y represents the visual difference (Δ L/L, i.e., the ratio of the just noticeable difference of the human eye to the background brightness).

Under the condition that the background brightness of the background area is determined, the target brightness visual difference corresponding to the background brightness can be determined according to a preset brightness visual difference curve. For example, when the background luminance L =5, the background luminance (L) is less than 10cd/m²With a visual difference of target luminance of y = j × 5^k(ii) a Background luminance L =15, background luminance (L) is greater than 10cd/m²But less than 300cd/m²And the corresponding target luminance visual difference is y = m.

Step 203: and determining the fusion degree parameter according to the first projection brightness of the projection area and the background brightness of the background area.

The fusion degree parameter represents the consistency degree of the brightness, the chromaticity and the like of the projection area and the background area in the projection surface. In the present disclosure, the fusion parameter is Δ L '/L, where Δ L' = L₀L, i.e. DeltaL', is the first projected brightness (L) of the projected area₀) A differential brightness with the background brightness (L) of the background region.

From the correlation data, a curve of the fusion degree parameter (Δ L '/L) with the background luminance (L) can be made, as shown by a curve z in fig. 27, which is a trend of the fusion degree parameter (Δ L'/L) with the background luminance (L) in the actual projection in fig. 27.

Step 204: and adjusting the brightness of the projection area according to the fusion degree parameter and the target brightness visual difference.

In an embodiment, the fusion degree parameter calculated in the actual projection is compared with the target brightness visual difference, and if the fusion degree parameter is less than or equal to the target brightness visual difference, it indicates that the human eye cannot perceive the difference between the brightness of the non-content area and the background brightness at this time.

The specific steps of adjusting the brightness of the projection area according to the fusion degree parameter and the target brightness visual difference comprise:

step 2041: acquiring an adjusting threshold;

step 2042: when the fusion degree parameter is larger than or equal to the target brightness visual difference, generating an automatic adjusting instruction;

step 2043: adjusting the brightness of the projection area according to the automatic adjusting instruction, and generating an adjusted fusion degree parameter;

step 2044: and when the adjusted fusion degree parameter is in an interval formed by the adjustment threshold value and the target brightness visual difference, generating and executing a stop adjustment instruction.

Specifically, the adjustment threshold z is a parameter for controlling the degree of adjusting the brightness of the projection area, for example, as shown in fig. 27, when the background brightness is less than 10cd/m²(candela/m) weak luminance, the adjustment threshold is z = y-a = jx^kA is the difference between the visual difference of the target brightness and the degree threshold a, where x represents the background brightness, z represents the adjustment threshold, and a represents the degree threshold (a may be a positive number, a may be a negative number, or zero since there may be differences in the minimum perceived difference of brightness for each person). For example, take j to be 0.0341 and k to be-0.813, i.e. the adjustment threshold is z =0.0341x^-0.813A, taking j as 0.0419 and k as-0.635, namely adjusting the threshold value to be z =0.0419x^-0.635-a, taking j as 0.0528 and k as-0.492, i.e. the adjustment threshold is z =0.0528x^-0.492A, taking j as 0.0622 and k as-0.162, namely, the adjustment threshold is z =0.0622x^-0.162-a; at a background luminance (L) of more than 10cd/m²(candela/sq m) less than 300cd/m²(candela/m squared), the adjustment threshold is z = y-a = m-a. For example, when m is 0.003, the adjustment threshold is z =0.003-a, when m is 0.014, the adjustment threshold is z =0.014-a, when m is 0.017, the adjustment threshold is z =0.017-a, when m is 0.025, the adjustment threshold is z =0.025-a, when m is 0.029, the adjustment threshold is z =0.029-a, and when m is 0.042, the adjustment threshold is z = 0.042-a. How the adjustment threshold is obtained will be described in detail below.

And determining whether to generate an automatic adjusting instruction by comparing the fusion degree parameter determined in the step 203 with the magnitude relation of the visual difference of the brightness of the target so as to adjust the brightness of the projection area, thereby eliminating the split feeling between the projection area and the background area. For example, at night, the background brightness of the background area is low, and the human eye brightness is slightly poor, so that the projection area and the background area are not splitIt is often strong and thus a feathering technique is required to adjust the brightness of the projected area so as to eliminate the feeling of splitting, and at the same time, the reduction in brightness caused by feathering is not much affected in a low light environment. As shown in fig. 27, for example, the background luminance corresponding to the point a is Lx, and the background luminance is a low-light environment less than 10cd/m2 in this case, according to the formula Δ L '/L (where L = Lx, Δ L' = first projection luminance L of the projection area corresponding to the point a)₀Lx) can calculate the fusion degree parameter at this time, and as can be clearly seen from fig. 27, the fusion degree parameter corresponding to the point a is larger than the target brightness visual difference corresponding to the point B; for another example, the background luminance corresponding to the point D is Ly, and when the background luminance is greater than 10cd/m2, the projection area corresponding to the point D has the first projection luminance L according to the formula Δ L '/L (where L = Ly, Δ L' = D point)₀Ly) can calculate the fusion degree parameter at this time, and as can be clearly seen from fig. 27, the fusion degree parameter corresponding to the D point is greater than the target brightness visual difference corresponding to the E point; in the case like the above (the fusion degree parameter is greater than or equal to the visual difference of the brightness of the object), from the perspective of the projection apparatus, an automatic adjustment instruction should be generated at this time to adjust the brightness of the projection area, thereby eliminating the feeling of splitting between the projection area and the background area.

It should be noted that, when the background brightness of the background area is relatively high, the minimum perceived difference of the human eye brightness is relatively small, and the human eye cannot perceive the brightness difference between the projection area and the background area, that is, the user cannot perceive the split feeling between the projection area and the background area, it is not necessary to start the feathering technique. If the feathering technique is forcibly used, the luminance is lowered and the image quality is also lowered.

After the brightness of the projection area is adjusted, the background brightness (L) of the background area and the adjusted brightness (L) of the projection area are needed to be used as the basis₀) And recalculating the adjusted fusion degree parameter, and controlling the eclosion degree by comparing the size relationship between the adjusted fusion degree parameter and the adjustment threshold value. Specifically, when the adjusted fusion degree parameter is in the interval formed by the adjustment threshold value and the target brightness visual difference (because the brightness visual difference of each person may have difference, when a is more than or equal to 0, z is less than or equal to the adjusted fusion degree parameter and less than y, and when a is less than or equal to 0, y is less than the adjusted fusion degree parameter and less than or equal to z)Then, a stop adjustment instruction can be generated and executed to stop adjusting the brightness of the projection area. It should be noted that, it is only necessary to control the adjusted fusion degree parameter to be within the range of the curve z and the minimum perceivable difference curve of human eye brightness, so that it can be ensured that the image quality loss is not too serious due to excessive feathering (i.e. excessive brightness adjustment).

The adjustment threshold value can be determined by the minimum perceived brightness difference of the user, and can also be customized by the user.

In one embodiment, the specific step of obtaining the fusion parameter threshold value through the minimum perceivable difference of the brightness of the user includes:

step 20411: acquiring dark field brightness, bright field brightness and background brightness of the background area of the projection equipment;

step 20412: and determining an adjusting threshold according to the dark field brightness, the bright field brightness and the background brightness of the background area.

Specifically, similar to the above description, the fusion degree index of the current projection may be obtained by calculating the dark field brightness, the bright field brightness, and the background brightness of the background area of the projection device, so as to adaptively select the most appropriate brightness adjustment threshold according to the current fusion degree index, so as to ensure that the image quality loss after feathering is started is within a reasonable range.

In one embodiment, the specific step of obtaining the fusion degree parameter threshold in a user-defined manner includes:

step 20413: receiving a threshold setting instruction from a user;

step 20414: and setting an adjusting threshold according to the threshold setting instruction.

Specifically, the user can customize a proper adjustment threshold value according to the watching habit of the user, so that the split feeling of the projection area and the background area can be eliminated after the eclosion is started, and the image quality is not lost due to excessive adjustment.

In one embodiment, after adjusting the brightness of the projection region, the adjusted fusion degree parameter needs to be recalculated, and thus the specific step of determining the adjusted fusion degree parameter includes:

step 20431: acquiring second projection brightness of the adjusted projection area;

step 20431: and determining the adjusted fusion degree parameter according to the second projection brightness and the background brightness of the background area.

The step of calculating the fusion degree parameter is described in detail above, and is not described in detail here.

Based on the content of the above embodiments, the embodiments of the present disclosure provide a brightness adjustment apparatus, which may be disposed in a projection device, where a projection surface of the projection device includes a projection area and a background area surrounding the projection area. The brightness adjusting apparatus is used for executing the brightness adjusting method provided in the above method embodiment, specifically, referring to fig. 28, the apparatus includes:

a brightness obtaining module 601, configured to obtain a background brightness of the background area and a first projection brightness of the projection area;

a visual difference determining module 602, configured to determine a target brightness visual difference according to a preset brightness visual difference curve and the background brightness of the background area;

a parameter determining module 603, configured to determine a fusion degree parameter according to the first projection brightness of the projection region and the background brightness of the background region;

and the adjusting module 604 is configured to adjust the brightness of the projection area according to the fusion degree parameter and the target brightness visual difference.

In one embodiment, the luminance obtaining module 601 includes:

the background determining module is used for determining the background area according to the coordinates of the imaging area and the projection area in the imaging area;

In one embodiment, the luminance obtaining module 601 includes:

and the projection brightness determining module is used for determining the first projection brightness of the non-content area according to the first illumination of the non-content area and the gain parameter.

In one embodiment, the first obtaining module includes:

and the gain data determining module is used for determining a gain parameter of the projection surface according to the second illumination, the first brightness and the second brightness of the projection surface.

In one embodiment, the adjustment module 604 includes:

In one embodiment, the threshold acquisition module comprises:

In one embodiment, the parameter generation module comprises:

the fourth acquisition module is used for acquiring the adjusted second projection brightness of the non-content area;

and the parameter determining submodule is used for determining the adjusted fusion degree parameter according to the adjusted second projection brightness of the non-content area and the background brightness of the background area.

The brightness adjusting device of the embodiment of the present disclosure may be used to implement the technical solutions of the foregoing method embodiments, and the implementation principles and technical effects thereof are similar, and are not described herein again.

Different from the prior art, the brightness adjusting device provided by the disclosure is provided with a parameter determining module and an adjusting module, determines a fusion degree parameter based on the brightness of the projection area and the background brightness through the parameter determining module, and finally adjusts the brightness of the projection area through the adjusting module according to the size relation between the fusion degree parameter and the visual difference of the target brightness. Specifically, when the fusion degree parameter is smaller than the target brightness visual difference and is greater than or equal to the adjustment threshold, the brightness of the projection area does not need to be adjusted; when the fusion degree parameter is smaller than the target brightness visual difference and is smaller than the adjusting threshold, the brightness of the projection area needs to be adjusted, so that the adjusted fusion degree parameter is in an interval formed by the adjusting threshold and the target brightness visual difference, and the projection image quality is prevented from being influenced by excessive brightness adjustment; when the fusion degree parameter is larger than the target brightness visual difference, the brightness of the projection area needs to be adjusted, and the adjusted fusion degree parameter is ensured to be in an interval formed by the adjustment threshold and the target brightness visual difference, so that the splitting sense between the projection area and the projection surface is eliminated, the reality sense is improved, and meanwhile, the influence on the projection image quality caused by excessive brightness adjustment can be reduced.

The present disclosure provides a projection device that can be adapted for use in home, education, work, and outdoor scenarios. Referring to fig. 1, the projection apparatus includes a light source 10 and a projection lens 20. The projection lens 20 may be a long-focus lens, a short-focus lens, an ultra-short-focus lens, and the like, and the disclosure is not limited thereto. The projection lens 20 includes a lens assembly 21 and a projection light effect device 22. The lens assembly 21 is accommodated in the projection light effect device 22, and the light source 10 is disposed in the projection light effect device 22 and emits light toward the lens assembly 21.

Referring to fig. 2 to 3, the projection light effect device 22 includes a housing 100, and a light effect component 300 and a connecting member 400 disposed in the housing 100.

The housing 100 is used for accommodating the light source 10, the lens assembly 21, the light effect assembly 300 and the connector 400. The light sources 10, the light effect components 300, and the lens components 21 are sequentially arranged in the housing 100 at intervals along the optical axis direction. The light source 10 emits a projection light toward the light effect assembly 300 and the lens assembly 21, and the projection light passes through the light effect assembly 300 and the lens assembly 21 and is projected on a projection surface such as a curtain or a wall surface. The light effect assembly 300 is movably connected to the housing 100, and is located between the light source and the lens assembly, and is mainly used for adjusting display effects of a projected picture, such as a projected picture and a projected light effect. The lens assembly 21 is located at the light-emitting end of the projection apparatus and includes a plurality of optical assemblies for optically processing the projection light to ensure the final projection is clear and accurate.

Referring to fig. 4, the light effect assembly 300 includes a light shielding plate 310 and a light effect plate 320. The light shielding plate 310 is provided with an imaging hole 311 with a preset contour to limit the projected picture. The light effect plate 320 is a light-transmitting plate for generating a predetermined light effect by projection, and a partial region of the surface of the light effect plate is processed by coating, sanding or engraving to show predetermined light effects such as edge feathering, background blurring and gaussian blurring. In this embodiment, the light shielding plate 310 and the light effect plate 320 are disposed opposite to each other, and in other embodiments, the light effect plate 320 may be embedded in the imaging hole 311 of the light shielding plate 310. The coating film may be coated with some films having optical functions, such as an optical filter having a filtering effect on light with a specific wavelength, and different regions of the optical filter may have different filtering effects on light, such as a transmittance of 30% for blue light in an edge region, a transmittance of 100% for blue light in a central region, and a transmittance between the central region and the edge region changing linearly or logarithmically. Alternatively, the edge region filters blue light, the central region filters red light, and the wavelength of the light filtered between the central region and the edge region varies linearly or logarithmically. Alternatively, both the transmittance and the wavelength of the filtered light may be varied.

In particular, the edge of the imaging hole 311 may be located at the inner side of the projected image at the light shielding plate 310 to define the shape and area of the projection, forming a predetermined contour thereof. In some embodiments, the contour of the imaging aperture 311 may also be adapted to the original frame of the projection, so that the projection is displayed as the original frame.

Specifically, the movement of the light effect assembly 300 relative to the housing 100 may be driven by a motor, a hydraulic device, or the like, or may be adjusted by a user.

The connecting member 400 is fixed in the housing 100 and movably connected to the light effect component 300, so that the light effect component 300 can move on the light incident side of the lens assembly 21 in the housing 100. When the light effect component 300 moves to the projection light path, the picture projected by the projection device is changed into the picture limited by the imaging hole 311 through the adjustment of the light effect component 300, and the preset light effect is presented. When the light effect component 300 moves far away from the projection light path, the projection of the projection device is not adjusted by the light effect component 300 and is presented as the original light effect of the original picture.

In other embodiments of the present disclosure, the light effect component 300 can also be movable on the light emitting side of the lens component 21, for example, in the embodiment shown in fig. 5, the light effect component 300 covers the light emitting port 101 on the outer side of the housing 100 and is slidably connected with the housing 100, and during the use process, a user can switch between the light effect and the picture by pulling or rotating the light effect component 300. By disposing the light effect component 300 outside the housing 100, the housing 100 does not need to dispose a space for the light effect component 300 to move, so that the space inside the housing 100 can be effectively saved, and the volume of the housing 100 can be reduced.

In still other embodiments of the present disclosure, referring to fig. 6, the light shielding plate 310 and the light effect plate 320 are respectively movable on the light emitting side and the light incident side of the lens assembly 21. The cross section area of the projection light on the light incident side of the lens assembly 21 is larger than that of the projection light on the light emergent side of the lens assembly 21, so that the light shielding plate 310 is arranged on the light incident side of the lens assembly 21 to be beneficial to cutting a picture, and the light effect plate 320 is arranged on the light emergent side of the lens assembly 21 to be beneficial to controlling the width of a blurred edge under edge blurring light effect.

The connecting member 400 is movably connected to the light effect assembly 300 in a rotating manner or a movable manner, which is not limited in this disclosure, and will be described in detail by way of example.

In some embodiments of the present disclosure, please refer to fig. 4 and 7 in combination, the connecting member 400 is a connecting plate, and a region corresponding to the light path projection is provided with a light-transmitting structure 401, in this embodiment, the light-transmitting structure 401 is specifically a light-transmitting groove, and in other embodiments, the light-transmitting structure may also be a light-transmitting structure such as a light-transmitting hole. Meanwhile, the light shielding plate 310 is movably connected with the connection member 400, and the light effect plate 320 is connected and fixed on the light shielding plate 310, is arranged corresponding to the imaging hole 311 of the light shielding plate 310, and moves together with the light shielding plate 310.

In an embodiment of the present disclosure, referring to fig. 4, the connecting member 400 includes a second connecting member 420, and the light-transmitting structure 401 is disposed on the second connecting member 420. A side of the second connecting member 420 is hinged to a side of the light effect assembly 300, and the light effect assembly 300 can be turned over on the connecting member 400 around the hinged side. In the flip structure, the second connector 420, which is a connection plate, may play a role of a limit. When the light effect component 300 is turned to the position attached to the second connecting piece 420, the imaging hole 311, the light effect plate 320 and the light transmission groove are overlapped and are all located on the light path, and the projection of the projection device penetrates through the imaging hole 311, the light effect plate 320 and the light transmission groove to finally present a preset picture and a preset light effect. When the light effect assembly 300 is flipped to a position away from the connection 400, the imaging hole 311 and the light effect plate 320 are away from the light path, leaving only the light groove in the light path. At this time, the projection of the projection device only passes through the light-transmitting structure 401, and the original picture and the original light effect are presented. In the present disclosure, the bottom side of the second connecting member 420 is hinged to the bottom side of the light effect component 300, and the bottom side of the light effect component 300 is further provided with a driver in driving connection with the light effect component 300 for driving the turning motion of the light effect component 300.

In another embodiment of the present disclosure, please refer to fig. 7 to 11 in combination, the connecting member 400 includes a first connecting member 410, the light-transmitting structure 401 is disposed on the first connecting member 410, and a sliding block 411 is disposed on one side of the light-transmitting structure 401 and intersects with the optical axis, and a sliding slot 301 is correspondingly disposed on the light-effect component 300, so that the light-effect component 300 can slide on the first connecting member 410 along the direction intersecting with the optical axis. In this embodiment, the optical component 300 slides left and right perpendicular to the optical axis, and in other embodiments, the optical component may slide up and down or slide obliquely, as long as the optical component 300 can be switched between the two states of being in the optical path and being out of the optical path, which is not limited in this disclosure. Meanwhile, in other embodiments, the first connecting member 410 may be provided with a sliding groove 301, and the light effect assembly 300 is correspondingly provided with a sliding block.

In an embodiment of the present disclosure, referring to fig. 7, the sliding groove 301 is disposed on the light shielding plate 310, and the light shielding plate 310 is slidably connected to the first connecting element 410. The light effect plate 320 is connected and fixed to the light shielding plate 310, is disposed corresponding to the imaging hole 311 of the light shielding plate 310, and moves together with the light shielding plate 310. When the light shielding plate 310 slides to the position where the light effect plate 320 coincides with the light transmission structure 401, the imaging hole 311, the light effect plate 320 and the light transmission groove coincide and are all on the light path, and the projection of the projection device passes through the imaging hole 311, the light effect plate 320 and the light transmission groove, so that a preset picture and a preset light effect are displayed finally. When the light shielding plate 310 slides to a position where the light effect plate 320 is far away from the light transmitting structure 401, the imaging hole 311 and the light effect plate 320 are far away from the light path, and only the light transmitting groove is still in the light path. At this time, the projection of the projection device only passes through the light-transmitting structure 401, and the original picture and the original light effect are presented.

In another embodiment of the present disclosure, please refer to fig. 8 in combination, the sliding groove 301 is disposed on the light shielding plate 310, and the light shielding plate 310 is slidably connected to the first connecting element 410. Meanwhile, the light shielding plate 310 is provided with a plurality of imaging holes 311 with different outlines so as to present different frames. For example, the outline of the imaging hole 311 may be a polygon such as a rectangle, a trapezoid, a rectangle with rounded corners, or a polygon with rounded corners, which is not limited in this disclosure, in other embodiments, a plurality of imaging holes 311 with the same outline may also exist in the plurality of imaging holes 311. Each imaging hole 311 is arranged at intervals along the sliding direction of the light shielding plate 310, each imaging hole 311 is correspondingly covered and connected with a light effect plate 320, and each light effect plate 320 makes the projection generate different preset light effects, for example, in the embodiment shown in fig. 8, two light effect plates 320 can respectively generate two light effects of gaussian blur and edge feathering. In the using process, the light shielding plate 310 is slid, when the imaging hole 311, the light effect plate 320 and the light transmission groove are overlapped, the projection of the projection device passes through the imaging hole 311, the light effect plate 320 and the light transmission groove, and finally, a preset picture and a preset light effect are displayed. Compared with the scheme, the scheme of the embodiment can present various picture frames and light effects, and the projection presenting modes of the projection equipment are remarkably enriched, so that the projection equipment can be suitable for more scenes.

In another embodiment of the present disclosure, please refer to fig. 9 to 11 in combination, the sliding groove 301 is disposed on the light shielding plate 310, and the light shielding plate 310 is slidably connected to the first connecting member 410. Meanwhile, the light shielding plate 310 is also provided with a plurality of imaging holes 311 with different outlines to present different pictures, and the imaging holes 311 are arranged at intervals along the sliding direction of the light shielding plate 310. However, in the present embodiment, the light effect assembly 300 further includes a fixing plate 330 disposed opposite to the light shielding plate 310. The light effect plate 320 is disposed on the fixing plate 330, and the fixing plate 330 is also slidably connected with the first connecting member 410 along the sliding direction of the light shielding plate 310, so that the fixing plate 330 and the light shielding plate 310 can slide relatively independently. The fixing plate 330 has a shape having the same size as or close to the light shielding plate 310 and is slidably coupled to the first coupling member 410. The light effect plates 320 are mounted on the fixing plate 330 and are spaced apart from each other along the sliding direction of the fixing plate 330. The shortest distance from the center of each light effect plate 320 to the sliding groove 301 is equal and is consistent with the shortest distance from each imaging hole 311 to the sliding groove 301. In the using process, the light shielding plate 310 and the fixing plate 330 can be respectively slid, when the imaging hole 311, the light effect plate 320 and the light transmission groove coincide, the projection of the projection device passes through the imaging hole 311, the light effect plate 320 and the light transmission groove, and finally the preset picture and the preset light effect are displayed. Compared with the scheme, the scheme of the embodiment can present more pictures and light effects, different pictures and light effects can be freely combined, and the projection presenting mode of the projection equipment is remarkably enriched, so that the projection equipment can be suitable for more scenes.

In other embodiments of the present disclosure, referring to fig. 12 to 16, the connecting member 400 includes a third connecting member 430. The third connecting member 430 is a connecting plate provided with the light-transmitting structure 401, and a connecting shaft 432 along the optical axis direction is further provided at one side of the light-transmitting structure 401. In other embodiments, the third connecting member 430 may also be a connecting shaft 432 disposed in the housing 100 along the optical axis direction, and the disclosure takes a connecting plate with a light-transmitting structure 401 as an example.

In an embodiment of the present disclosure, referring to fig. 12, the light shielding plate 310 is movably connected to the third connecting member 430, and the light effect plate 320 is connected and fixed to the light shielding plate 310, is disposed corresponding to the imaging hole 311 of the light shielding plate 310, and moves together with the light shielding plate 310. The light shielding plate 310 is sleeved on the connecting shaft 432 and rotates around the connecting shaft 432. When the light shielding plate 310 rotates to the position where the light effect plate 320 coincides with the light transmission structure 401, the imaging hole 311, the light effect plate 320 and the light transmission groove coincide and are all on the light path, and the projection of the projection device penetrates through the imaging hole 311, the light effect plate 320 and the light transmission groove, so that a preset picture and a preset light effect are displayed finally. When the light shielding plate 310 rotates to a position where the light effect plate 320 is far away from the light transmitting structure 401, the imaging hole 311 and the light effect plate 320 are far away from the light path, and only the light transmitting groove is still in the light path. At this time, the projection of the projection device only passes through the light-transmitting structure 401, and the original picture and the original light effect are presented.

In another embodiment of the present disclosure, referring to fig. 13, the light shielding plate 310 may be a disk shape, and the center of the disk shape is rotatably connected to the connecting shaft 432, and the center of the light shielding plate 310 becomes the rotation center of the light effect element 300. The light shielding plate 310 is provided with a plurality of imaging holes 311 with different outlines so as to present different pictures. For example, the outline of the imaging hole 311 may be a polygon such as a rectangle, a trapezoid, a rectangle with rounded corners, or a polygon with rounded corners, which is not limited in this disclosure, in other embodiments, a plurality of imaging holes 311 with the same outline may also exist in the plurality of imaging holes 311. The imaging holes 311 are uniformly arranged around the center of the light shielding plate 310 at intervals, each imaging hole 311 is correspondingly covered and connected with a light effect plate 320, and each light effect plate 320 makes the projection generate different preset light effects, for example, in the embodiment shown in fig. 13, four light effect plates 320 can respectively generate four light effects of an original light effect, a gaussian blur, an edge feathering effect and a background blurring effect. In the using process, the light shielding plate 310 is rotated, when the imaging hole 311, the light effect plate 320 and the light transmission groove coincide, the projection of the projection device passes through the imaging hole 311, the light effect plate 320 and the light transmission groove, and finally, a preset picture and a preset light effect are displayed. Compared with the scheme, the scheme of the embodiment can present various picture frames and light effects, and the projection presenting modes of the projection equipment are remarkably enriched, so that the projection equipment can be suitable for more scenes.

In another embodiment of the present disclosure, referring to fig. 14 to 16, the light shielding plate 310 is also disc-shaped and is rotatably connected to the connecting shaft 432 at a center of the disc. The light shielding plate 310 is provided with a plurality of imaging holes 311 with different outlines so as to present different pictures, and the imaging holes 311 are uniformly distributed around the center of the light shielding plate 310 at intervals. However, in the present embodiment, the light effect assembly 300 further includes a fixing plate 330 disposed opposite to the light shielding plate 310. The light effect plate 320 is disposed on the fixing plate 330, and the fixing plate 330 and the light shielding plate 310 rotate relatively independently. The fixing plate 330 is shaped like a disk having the same size as or close to the light shielding plate 310, and is rotatably connected to the connecting shaft 432 at the center of the disk. The light effect plates 320 are embedded on the fixing plate 330 and are uniformly spaced around the center of the fixing plate 330. The center of each light effect plate 320 is equal to the center of the fixed plate 330, and is the same as the distance from each imaging hole 311 to the center of the light shielding plate 310. In the using process, the light shielding plate 310 and the fixing plate 330 can be respectively rotated, when the imaging hole 311, the light effect plate 320 and the light transmission groove coincide, the projection of the projection device passes through the imaging hole 311, the light effect plate 320 and the light transmission groove, and finally the preset picture and the preset light effect are displayed. Compared with the scheme, the scheme of the embodiment can present more pictures and light effects, different pictures and light effects can be freely combined, and the projection presenting mode of the projection equipment is remarkably enriched, so that the projection equipment can be suitable for more scenes.

In still other embodiments of the present disclosure, referring to fig. 17 and 18, the connecting member 400 includes the second connecting member 420. The second connecting member 420 is a connecting plate with a light-transmitting structure 401, and the light effect assembly 300 further includes a fixing plate 330 disposed opposite to the light shielding plate 310. The fixing plate 330 is slidably received in the housing 100. One side of the light shielding plate 310 is hinged to one side of the second connecting member 420 to perform a tilting motion relative to the second connecting member 420. In the using process, the original light effect and the preset light effect can be switched by sliding the fixing plate 330. Meanwhile, referring to fig. 19 to 21, in the present embodiment, the final image frame can be adjusted by adjusting the turning angle of the light shielding plate 310. When the imaging hole 311, the light effect plate 320 and the light transmission groove are overlapped, the projection of the projection device passes through the imaging hole 311, the light effect plate 320 and the light transmission groove, and finally the preset picture and the preset light effect are displayed.

Meanwhile, in some embodiments of the present disclosure, please refer to fig. 22, the connecting member 400 may be slidably connected to the housing 100, and may drive the light effect element 300 to slide along the optical axis direction together, so as to adjust the distance between the light effect element 300 and the light source 10 of the projection apparatus, thereby ensuring the final imaging quality of the projection apparatus.

Although not shown, the projection device may also include a processor, memory, etc., which are not described in detail herein. Specifically, in this embodiment, a processor in the electronic device loads an executable file corresponding to a process of one or more application programs into a memory according to the following instructions, and the processor runs the application programs stored in the memory, so as to implement the following functions:

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and parts that are not described in detail in a certain embodiment may refer to the above detailed description, and are not described herein again.

It will be understood by those skilled in the art that all or part of the steps of the methods of the above embodiments may be performed by instructions or by associated hardware controlled by the instructions, which may be stored in a computer readable storage medium and loaded and executed by a processor.

To this end, the disclosed embodiments provide a computer-readable storage medium having stored therein a plurality of instructions that are loadable by a processor to cause the following functionality:

The above operations can be implemented in the foregoing embodiments, and are not described in detail herein.

Wherein the computer-readable storage medium may include: read Only Memory (ROM), Random Access Memory (RAM), magnetic or optical disks, and the like.

Since the instructions stored in the computer-readable storage medium can execute the steps in any method provided by the embodiments of the present disclosure, the beneficial effects that can be achieved by any method provided by the embodiments of the present disclosure can be achieved, which are detailed in the foregoing embodiments and will not be described herein again.

Meanwhile, the disclosed embodiments provide a computer program product or a computer program comprising computer instructions stored in a computer-readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions to cause the computer device to perform the method provided in the various alternative implementations described above. For example, the following functions are implemented:

The brightness adjustment method, the brightness adjustment device, the projection apparatus, and the computer-readable storage medium provided in the embodiments of the present disclosure are described in detail above, and specific examples are applied herein to illustrate the principles and implementations of the present disclosure, and the description of the embodiments above is only used to help understand the method and the core ideas of the present disclosure; meanwhile, for those skilled in the art, according to the idea of the present disclosure, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present description should not be construed as a limitation to the present disclosure.

Claims

1. A brightness adjusting method is applied to a projection device, a projection surface of the projection device comprises a projection area and a background area, and the method comprises the following steps:

2. A brightness adjustment method according to claim 1, wherein said step of obtaining the background brightness of the background area comprises:

acquiring an imaging area in the field angle of the projection equipment;

determining the coordinates of the projection area in the imaging area according to the distance parameter of the projection equipment from the projection surface;

determining the background area according to the coordinates of the imaging area and the projection area in the imaging area;

determining the background gray scale of the background area according to a gray scale calculation mode;

and determining the background brightness of the background area according to the mapping relation between the gray scale and the brightness.

3. The brightness adjustment method according to claim 1 or 2, wherein the step of obtaining the first projection brightness of the projection area comprises:

acquiring a dark field brightness parameter of the projection equipment, a gain parameter of the projection surface and the area of the projection area, wherein the projection area comprises a content area and a non-content area;

determining a first illumination of the non-content area according to the dark field brightness parameter and the area of the projection area;

and determining a first projection brightness of the non-content area according to the first illumination and the gain parameter.

4. The brightness adjustment method according to claim 3, wherein the step of obtaining the gain parameter of the projection surface comprises:

acquiring a first gray scale and a second gray scale of the imaging area in the field angle of the projection equipment, wherein the first gray scale is a gray scale value corresponding to a full white picture in the imaging area in the field angle of the projection equipment, and the second gray scale is a gray scale value corresponding to a full black picture in the imaging area in the field angle of the projection equipment;

determining first brightness corresponding to the first gray scale and second brightness corresponding to the second gray scale according to a mapping relation between the gray scale and the brightness;

acquiring a bright field brightness parameter of the projection equipment and the area of the projection area;

determining a second illumination of the projection surface according to the bright field brightness parameter and the area of the projection area;

and determining a gain parameter of the projection surface according to the second illumination, the first brightness and the second brightness.

5. The brightness adjustment method according to claim 1, wherein the step of adjusting the brightness of the projection area according to the fusion degree parameter and the visual difference of the target brightness comprises:

acquiring an adjusting threshold;

when the fusion degree parameter is larger than or equal to the target brightness visual difference, generating an automatic adjusting instruction;

adjusting the brightness of the projection area according to the automatic adjusting instruction, and generating an adjusted fusion degree parameter;

and when the adjusted fusion degree parameter is in an interval formed by the adjustment threshold value and the target brightness visual difference, generating and executing a stop adjustment instruction.

6. The brightness adjustment method according to claim 5, wherein the step of obtaining the adjustment threshold value comprises:

acquiring dark field brightness, bright field brightness and background brightness of the background area of the projection equipment;

and determining an adjusting threshold according to the dark field brightness, the bright field brightness and the background brightness of the background area.

7. The brightness adjustment method according to claim 5, wherein the step of obtaining the adjustment threshold value comprises:

receiving a threshold setting instruction from a user;

and setting an adjusting threshold according to the threshold setting instruction.

8. A brightness adjustment apparatus, adapted to a projection device, wherein a projection surface of the projection device includes a projection area and a background area, the apparatus comprising:

9. A projection apparatus comprising a processor and a memory, the memory storing a computer program, the processor being configured to execute the computer program in the memory to perform the steps of the brightness adjustment method according to any one of claims 1 to 7.

10. A computer-readable storage medium storing instructions adapted to be loaded by a processor to perform the steps of the brightness adjustment method according to any one of claims 1 to 7.