CN112000304A - Projection display method and device - Google Patents
Projection display method and device Download PDFInfo
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- CN112000304A CN112000304A CN201910448299.XA CN201910448299A CN112000304A CN 112000304 A CN112000304 A CN 112000304A CN 201910448299 A CN201910448299 A CN 201910448299A CN 112000304 A CN112000304 A CN 112000304A
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- 239000003086 colorant Substances 0.000 claims abstract description 50
- 238000012545 processing Methods 0.000 claims description 13
- 238000000605 extraction Methods 0.000 claims description 7
- 210000001508 eye Anatomy 0.000 abstract description 56
- 208000003464 asthenopia Diseases 0.000 abstract description 29
- 230000008859 change Effects 0.000 abstract description 14
- 210000003205 muscle Anatomy 0.000 abstract description 12
- 210000005252 bulbus oculi Anatomy 0.000 abstract description 11
- 230000004379 myopia Effects 0.000 abstract description 9
- 208000001491 myopia Diseases 0.000 abstract description 9
- 230000000694 effects Effects 0.000 description 12
- 230000008569 process Effects 0.000 description 5
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- 230000036541 health Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 206010049565 Muscle fatigue Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
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- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
Abstract
The invention belongs to the technical field of projection, and discloses a projection display method and a device, wherein the method comprises the following steps: acquiring the distance between a user and a projection screen; acquiring a target time length corresponding to the distance from a preset database; recording the watching duration of the user watching the projection; and when the watching duration exceeds the target duration, sequentially projecting pictures with different sizes and different colors. When the time length of the user watching the projection exceeds the time length of the target, the invention displays the pictures with different sizes and colors on the projection screen in a projection mode in sequence, so that the eyes of the user can move unconsciously along with the change of the display content, the purpose of moving the eyeballs and the eye muscles of the user is achieved, the eye fatigue of the user is relieved, the myopia problem caused by the eye fatigue is further reduced, and the eyes of the user are protected.
Description
Technical Field
The invention belongs to the technical field of projection, and particularly relates to a projection display method and device.
Background
With the rapid development of scientific technology, various display devices are more and more popular, and the health problems caused by the popularization are increasingly highlighted, wherein the most prominent problem is the problem of eyesight damage to users.
When using various display devices, such as electronic screens and projection, a user can unconsciously watch characters, pictures, video information and the like on the display device for a long time, so that eyes are in a fixed focal length state for a long time, eye muscles are always in a tense contraction state, and the long-time watching causes eye muscle fatigue and pupil deformation of the user, thereby causing myopia.
In order to reduce the time that a user gazes at a display device for a long time, the prior art mainly reminds the user that the watching time reaches a preset time, and needs to rest to relieve eye fatigue, but the user with poor self-control usually ignores the prompt and continues watching, so that the aims of relieving the eye fatigue of the user and protecting the eyes of the user cannot be fulfilled.
Disclosure of Invention
The invention aims to provide a projection display method and a projection display device, which can realize that the eyes of a user can move unconsciously along with the change of display contents by projecting and displaying pictures with different sizes and different colors, and play the aim of moving the eyeballs and the eye muscles of the user so as to relieve the eye fatigue of the user.
The technical scheme provided by the invention is as follows:
in one aspect, a projection display method is provided, including:
acquiring the distance between a user and a projection screen;
acquiring a target time length corresponding to the distance from a preset database;
recording the watching duration of the user watching the projection;
and when the watching duration exceeds the target duration, sequentially projecting pictures with different sizes and different colors.
Further preferably, the acquiring the distance between the user and the projection screen specifically includes:
acquiring a first distance between a projection device and the projection screen;
acquiring azimuth information of the user and a second distance between the projection device and the user;
and acquiring the distance between the user and the projection screen according to the first distance, the second distance and the azimuth information.
Further preferably, before obtaining the distance between the user and the projection screen, the method further includes:
acquiring a large number of pictures;
arranging the pictures in sequence according to a preset rule and the picture colors corresponding to the pictures;
according to the preset rule, zooming processing with different proportions is carried out on each sequenced picture;
and storing the zoomed pictures in a picture library according to the arrangement sequence.
Further preferably, when the viewing duration exceeds the target duration, sequentially projecting pictures of different sizes and different colors in sequence specifically includes:
when the watching duration exceeds the target duration, sequentially extracting pictures with different sizes and different colors from the picture library according to the arrangement sequence of the pictures;
and projecting the extracted pictures in sequence according to the extraction sequence, and changing the projection positions of the pictures during projection.
Further preferably, the method further comprises the following steps:
when the watching duration exceeds the target duration, acquiring the light intensity value of the surrounding environment;
and when the light intensity value is lower than a preset light intensity threshold value, starting the auxiliary lighting light source.
In another aspect, there is also provided a projection display device including:
the distance acquisition module is used for acquiring the distance between a user and the projection screen;
the target duration acquisition module is used for acquiring the target duration corresponding to the distance from a preset database;
the watching duration recording module is used for recording the watching duration of the projection watched by the user;
and the projection module is used for sequentially projecting pictures with different sizes and different colors when the watching duration exceeds the target duration.
Further preferably, the distance obtaining module includes:
the first distance acquisition unit is used for acquiring a first distance between the projection device and the projection screen;
an orientation acquisition unit configured to acquire orientation information of the user;
a second distance obtaining unit, configured to obtain a second distance between the projection apparatus and the user;
and the third distance acquisition unit is used for acquiring the distance between the user and the projection screen according to the first distance, the second distance and the azimuth information.
Further preferably, the method further comprises the following steps:
the image acquisition module is used for acquiring a large number of images;
the ordering module is used for arranging the pictures in sequence according to a preset rule and the picture colors corresponding to the pictures;
the zooming module is used for zooming the sequenced pictures in different proportions according to the preset rule;
and the storage module is used for storing the zoomed pictures in a picture library according to the arrangement sequence.
Further preferably, the projection module includes:
the picture extracting unit is used for sequentially extracting pictures with different sizes and different colors from the picture library according to the arrangement sequence of the pictures when the watching duration exceeds the target duration;
and the position changing unit is used for sequentially projecting the extracted pictures according to the extraction sequence and changing the projection positions of the pictures during projection.
Further preferably, the method further comprises the following steps:
the light intensity acquisition module is used for acquiring the light intensity value of the surrounding environment when the watching time length exceeds the target time length;
and the light source starting module is used for starting the auxiliary lighting light source when the light intensity value is lower than a preset light intensity threshold value.
Compared with the prior art, the projection display method and the device provided by the invention have the beneficial effects that: when the time length of the user watching the projection exceeds the time length of the target, the invention displays the pictures with different sizes and colors on the projection screen in a projection mode in sequence, so that the eyes of the user can move unconsciously along with the change of the display content, the purpose of moving the eyeballs and the eye muscles of the user is achieved, the eye fatigue of the user is relieved, the myopia problem caused by the eye fatigue is further reduced, and the eyes of the user are protected.
Drawings
The above features, technical features, advantages and modes of realisation of a projection display method and apparatus will be further described in the following, in a clearly understandable manner, with reference to the accompanying drawings, which illustrate preferred embodiments.
FIG. 1 is a flowchart illustrating a projection display method according to a first embodiment of the present invention;
FIG. 2 is a flowchart illustrating a second embodiment of a projection display method according to the present invention;
FIG. 3 is a flowchart illustrating a third embodiment of a projection display method according to the present invention;
FIG. 4 is a flowchart illustrating a fourth embodiment of a projection display method according to the present invention;
FIG. 5 is a flowchart illustrating a fifth embodiment of a projection display method according to the present invention;
fig. 6 is a block diagram schematically illustrating a structure of an embodiment of a projection display apparatus according to the present invention.
Description of the reference numerals
100. A distance acquisition module; 110. A first distance acquisition unit;
120. an orientation acquisition unit; 130. A second distance acquisition unit;
140. a third distance acquisition unit; 200. A target duration acquisition module;
300. a watching duration recording module; 400. A projection module;
410. a picture extraction unit; 420. A position changing unit;
500. a picture acquisition module; 600. A sorting module;
700. a scaling module; 800. A storage module;
900. a light intensity acquisition module; 1000. And a light source opening module.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".
Fig. 1 is a flowchart of a projection display method according to a first embodiment of the present invention, where the projection display method may be used in an intelligent desk lamp with a projection function, and the projection function may be implemented by a projection device. The projection display method specifically comprises the following steps:
s100, acquiring the distance between a user and a projection screen;
specifically, the projection screen may be a projection screen provided specifically for projection, or may be a wall surface or the like that can be used for projection.
When the projection curtain is arranged, a distance sensor can be arranged on the projection curtain, and then the distance from a user to the projection curtain is obtained through the arranged distance sensor. After the distance sensor on the projection screen obtains the distance between the user and the projection screen, the obtained distance is sent to the intelligent desk lamp.
If not set up when special projection curtain, can also acquire the distance of user and projection screen through setting up distance sensor and position sensor on intelligent desk lamp.
S200, acquiring a target duration corresponding to the distance from a preset database;
specifically, the preset database stores in advance viewing durations corresponding to each distance determined based on the characteristics of the human eyes and the medical information. The closer the distance, the shorter the continuously viewable duration; similarly, the further the distance, the longer the duration of continuous viewing.
For example, if the distance between the user and the projection screen is 2 meters, the time for one continuous viewing is 30 minutes; if the distance between the user and the projection screen is 3 meters, the time length for continuously watching at one time is 40 minutes; if the distance between the user and the projection screen is 4 meters, the continuous viewing time is 50 minutes.
And matching the acquired distance between the user and the projection screen in a preset database so as to determine the target duration corresponding to the distance. The target duration is duration that the user can continuously watch at one time at the distance, and the watching duration of the user exceeds the target duration, namely the user needs to have a rest for eyes, so that eyestrain is relieved.
S300, recording the watching duration of the user watching the projection;
specifically, in order to more accurately determine whether the eyes of the user need to rest, what needs to be recorded here is the viewing time period during which the user continuously views the projection, rather than recording the projection time period of the projection.
Recording the watching time length of the user watching the projection, detecting whether a person exists in front of the projection device or the projection screen through the infrared sensor after the projection is started, and if the person exists, indicating that the user watches the projection and starting timing. When the user goes out in the middle of projection and the infrared sensor detects that no one is watching the projection, stopping timing; when the user returns, the infrared sensor detects that someone watches the projection again, and the time interval of the user returning when the user goes out is recorded.
If the time interval is greater than the preset interval threshold, it indicates that the eyes of the user have been sufficiently rested during the time when the user is out and does not watch the projection, and the recording of the watching time length of the user can be restarted.
If the time interval is smaller than the preset interval threshold, it indicates that the eyes of the user cannot have a full rest in the period of time when the user goes out and does not watch the projection, and the watching duration of the user cannot be recorded again.
S400, when the watching duration exceeds the target duration, sequentially projecting pictures with different sizes and different colors.
Specifically, when the watching time length is recorded to be longer than the target time length, the time that the eye muscles of the user are in a fatigue state is recorded to be longer than the target time length, and the eye fatigue of the user needs to be relieved to prevent myopia from being caused. At this time, pictures with different sizes and different colors can be projected and displayed on the projection screen in sequence. The projection display has different sizes, so that the eyes of the user can move unconsciously along with the change of the display content, the purpose of moving the eyeballs and the eye muscles of the user is achieved, and the eye fatigue of the user is relieved; the projection display of pictures with different colors, such as green and blue pictures, can make the eyes of users feel comfortable, and can also help to relieve the eye fatigue of users, thereby reducing the myopia problem caused by the eye fatigue and protecting the eyes of users.
In this embodiment, when the duration of watching the projection exceeds the duration of the target, the pictures with different sizes and different colors are projected and displayed on the projection screen in sequence, so that the eyes of the user can move unconsciously along with the change of the display content, the purpose of moving the eyeballs and the eye muscles of the user is achieved, the eyestrain of the user is relieved, the myopia problem caused by the eyestrain is further reduced, and the eyes of the user are protected.
Fig. 2 is a flowchart of a projection display method according to a second embodiment of the present invention, where the projection display method can be used in an intelligent desk lamp with a projection function, and the projection function can be implemented by a projection device. The projection display method specifically comprises the following steps:
s110, acquiring a first distance between a projection device and the projection screen;
s120, acquiring azimuth information of the user and a second distance between the projection device and the user;
s130, acquiring the distance between the user and the projection screen according to the first distance, the second distance and the direction information;
s200, acquiring a target duration corresponding to the distance from a preset database;
s300, recording the watching duration of the user watching the projection;
s400, when the watching duration exceeds the target duration, sequentially projecting pictures with different sizes and different colors.
Specifically, when a special projection curtain is not arranged and a distance sensor cannot be mounted on the projection curtain, the distance sensor and a position sensor can be arranged on the intelligent desk lamp, a first distance between the projection device and the projection screen is obtained through the distance sensor arranged on the intelligent desk lamp, and the projection device is arranged on the intelligent desk lamp; and a second distance from the user is acquired through a distance sensor arranged on the intelligent desk lamp, and the direction information of the user relative to the intelligent desk lamp is acquired through a position sensor arranged on the intelligent desk lamp.
After the azimuth information of the user and the intelligent desk lamp is obtained, a right-angled triangle is constructed by taking a connecting line of the intelligent desk lamp and the position of the user as a hypotenuse, and the second distance is the length of the hypotenuse; and according to the direction information of the user and the intelligent desk lamp, the angle information of the hypotenuse and the horizontal right-angle side in the constructed right-angle triangle is obtained. According to the angle information and the length (second distance) of the hypotenuse, the length information of the other two right-angle sides in the constructed right-angle triangle can be calculated.
After the lengths of the other two right-angle sides in the constructed right-angle triangle are obtained, the distance between the user and the intelligent desk lamp can be obtained according to the length of one right-angle side and the first distance between the intelligent desk lamp and the projection screen.
Illustratively, the floor of a room is taken as a plane, the length direction of the floor is defined as the horizontal direction, and the width direction of the floor is defined as the vertical direction. Assuming that the first distance between the intelligent desk lamp and the projection screen is the distance along the vertical direction, the distance is obtained by adding the first distance to the length of the right-angle side in the vertical direction in the right-angled triangle, and the obtained distance is the distance between the user and the intelligent desk lamp. Assuming that the first distance between the intelligent desk lamp and the projection screen is the distance along the horizontal direction, the distance is obtained by adding the first distance to the length of the right-angle side in the horizontal direction in the right-angled triangle, and the obtained distance is the distance between the user and the intelligent desk lamp.
In the scheme, the distance between the user and the projection screen can be accurately obtained by the arranged distance sensor and the arranged position sensor when the projection screen is not arranged, so that more accurate target duration can be obtained, and the user is prevented from overusing eyestrain, so that the eyes of the user can be better protected.
Fig. 3 is a flowchart of a projection display method according to a third embodiment of the present invention, where the projection display method may be used in an intelligent desk lamp with a projection function, and the projection function may be implemented by a projection device. The projection display method specifically comprises the following steps:
s010 obtains a large number of pictures;
specifically, a large number of pictures can be collected in various picture libraries on the network, and the large number of pictures collected from the network can be subjected to some filtering and screening to screen out some unsuitable pictures, such as pictures with low resolution, pictures with unsuitable content, pictures with unsuitable color, and the like.
S020 arranging the pictures in sequence according to a preset rule and the picture colors corresponding to the pictures;
specifically, the preset rule refers to a rule established in advance according to human eye characteristics and medical information, such as how much the scaling ratio between every two continuously projected pictures is when the pictures are projected; when a picture is projected, the color sequence of the projected pictures, that is, what color picture is projected first, what color picture is projected second, and the like.
After a preset rule is formulated according to the characteristics of human eyes and medical information, the colors of the obtained pictures can be sequenced according to the formulated preset rule. Exemplarily, it is assumed that all the collected pictures contain four colors in total, namely a first color, a second color, a third color and a fourth color; the preset rule is that the projection is carried out in sequence according to a first color, a second color, a third color and a fourth color; the pictures are circularly arranged according to the colors of the pictures in sequence of the first color, the second color, the third color and the fourth color.
S030 performs scaling processing of different proportions on each sequenced picture according to the preset rule;
specifically, after the pictures are circularly arranged according to the color rules, the pictures after being sorted are scaled according to the preset rules in different proportions. In order to form a gradually-changing effect of gradually increasing or decreasing during the projection of the picture, the second picture, the third picture and the fourth picture need to be scaled in different proportions by taking the first picture as a reference.
For example, in the first cycle of four color pictures, the second picture is reduced by 10%, the third picture is reduced by 20%, the fourth picture is reduced by 30%, and the fifth picture is reduced by 40% with respect to the first picture. In the second cycle of the four color pictures, the third picture is reduced by 10%, the second picture is reduced by 20%, and the first picture is reduced by 30%, based on the fourth picture.
After the processing, a gradual change process that the picture is firstly reduced and then increased can be formed in the process of picture projection.
S040 stores the zoomed pictures in a picture library according to the arrangement sequence;
specifically, after the above-described processing is performed on a large number of acquired pictures, the processed pictures are sequentially stored in the constructed picture library in the order of the previous arrangement. When projection is needed, pictures can be taken from the picture library in sequence for projection.
S100, acquiring the distance between a user and a projection screen;
s200, acquiring a target duration corresponding to the distance from a preset database;
s300, recording the watching duration of the user watching the projection;
s400, when the watching duration exceeds the target duration, sequentially projecting pictures with different sizes and different colors.
In the scheme, the pictures are processed in advance, so that when the pictures are projected, the pictures are directly transferred according to the storage sequence, the gradual change effect can be realized by the projection processing effect, the pictures do not need to be zoomed at any time during projection, and the projection efficiency is improved.
Fig. 4 is a flowchart of a projection display method according to a fourth embodiment of the present invention, where the projection display method can be used in an intelligent desk lamp with a projection function, and the projection function can be implemented by a projection device. The projection display method specifically comprises the following steps:
s010 obtains a large number of pictures;
s020 arranging the pictures in sequence according to a preset rule and the picture colors corresponding to the pictures;
s030 performs scaling processing of different proportions on each sequenced picture according to the preset rule;
s040 stores the zoomed pictures in a picture library according to the arrangement sequence;
s100, acquiring the distance between a user and a projection screen;
s200, acquiring a target duration corresponding to the distance from a preset database;
s300, recording the watching duration of the user watching the projection;
s410, when the watching duration exceeds the target duration, sequentially extracting pictures with different sizes and different colors from the picture library according to the arrangement sequence of the pictures;
s420, projecting the extracted pictures in sequence according to the extraction sequence, and changing the projection positions of the pictures during projection.
Specifically, when the recorded viewing duration exceeds the target duration, pictures of different sizes and different colors can be directly and sequentially extracted from a picture library constructed in advance according to the storage sequence of the pictures. In the picture library, the pictures are arranged according to different colors and different sizes, so that the directly extracted pictures are the pictures with different sizes and different colors, and other processing is not needed.
After pictures with different sizes and different colors are extracted from the picture library, the extracted pictures can be directly projected. Since the size of the projection screen is fixed, when the size of the picture is different (different in size), the size of the picture displayed on the projection screen is also different. For example, the first picture is projected and displayed in full screen, the second picture is projected and occupies 90% of the projection screen, and the third picture is projected and occupies 80% of the projection screen. The multiple pictures with different sizes are projected in sequence, so that a gradually-changing effect which gradually becomes smaller can be formed, and the formed gradually-changing effect can form visual distance so as to simulate the effect that a user observes objects with different distances by continuously adjusting the focal length when the user uses eyes outdoors, thereby relieving the visual fatigue of the user and protecting the eye health of the user.
In addition, when a certain group of pictures are projected, the projection positions of the pictures can be changed, for example, the projection positions of the pictures can be adjusted up, down, left and right, so that the eyeballs of the user can move along with the change of the projection positions of the pictures, and the purpose of moving the eyeballs and the eye muscles is achieved.
Fig. 5 is a flowchart of a projection display method according to a fifth embodiment of the present invention, where the projection display method may be used in an intelligent desk lamp with a projection function, and the projection function may be implemented by a projection device. The projection display method specifically comprises the following steps:
s100, acquiring the distance between a user and a projection screen;
s200, acquiring a target duration corresponding to the distance from a preset database;
s300, recording the watching duration of the user watching the projection;
s400, when the watching duration exceeds the target duration, sequentially projecting pictures with different sizes and different colors;
s500, when the watching duration exceeds the target duration, acquiring a light intensity value of the surrounding environment;
s600, when the light intensity value is lower than a preset light intensity threshold value, the auxiliary lighting light source is started.
Specifically, when the watching duration of the user exceeds the target duration, if the light intensity value of the collected surrounding environment is lower than the preset light intensity threshold value, indoor light needs to be adjusted, so that the user is in comfortable light when relieving eye fatigue, and the eye comfort of the user is improved.
The indoor light is adjusted mainly by adjusting the auxiliary lighting source on the intelligent desk lamp. The intelligent desk lamp is provided with a main lighting source and an auxiliary lighting source, and the main lighting source is mainly used for providing a lighting source for a user when the user reads books and learns. The auxiliary lighting light source is mainly used for adjusting the brightness of indoor light, and is a relatively soft light source.
In this scheme, when the picture through projection equidimension not, different colours, through the light brightness in the regulation room to make user's eyes be in under comparatively comfortable lighting environment, and then improve user's eye comfort level, so that better alleviate user with eye fatigue.
It should be understood that, in the foregoing embodiments, the sequence numbers of the steps do not mean the execution sequence, and the execution sequence of the steps should be determined by functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.
Fig. 6 is a block diagram schematically illustrating a structure of a projection display apparatus according to a sixth embodiment of the present invention, the projection display apparatus including:
a distance obtaining module 100, configured to obtain a distance between a user and a projection screen;
specifically, the projection screen may be a projection screen provided specifically for projection, or may be a wall surface or the like that can be used for projection.
When the projection curtain is arranged, a distance sensor can be arranged on the projection curtain, and then the distance from a user to the projection curtain is obtained through the arranged distance sensor. After the distance sensor on the projection screen obtains the distance between the user and the projection screen, the obtained distance is sent to the intelligent desk lamp.
If not set up when special projection curtain, can also acquire the distance of user and projection screen through setting up distance sensor and position sensor on intelligent desk lamp.
A target duration obtaining module 200, configured to obtain a target duration corresponding to the distance from a preset database;
specifically, the preset database stores in advance viewing durations corresponding to each distance determined based on the characteristics of the human eyes and the medical information. The closer the distance, the shorter the continuously viewable duration; similarly, the further the distance, the longer the duration of continuous viewing.
For example, if the distance between the user and the projection screen is 2 meters, the time for one continuous viewing is 30 minutes; if the distance between the user and the projection screen is 3 meters, the time length for continuously watching at one time is 40 minutes; if the distance between the user and the projection screen is 4 meters, the continuous viewing time is 50 minutes.
And matching the acquired distance between the user and the projection screen in a preset database so as to determine the target duration corresponding to the distance. The target duration is duration that the user can continuously watch at one time at the distance, and the watching duration of the user exceeds the target duration, namely the user needs to have a rest for eyes, so that eyestrain is relieved.
A viewing duration recording module 300, configured to record a viewing duration for the user to view the projection;
specifically, in order to more accurately determine whether the eyes of the user need to rest, what needs to be recorded here is the viewing time period during which the user continuously views the projection, rather than recording the projection time period of the projection.
Recording the watching time length of the user watching the projection, detecting whether a person exists in front of the projection device or the projection screen through the infrared sensor after the projection is started, and if the person exists, indicating that the user watches the projection and starting timing. When the user goes out in the middle of projection and the infrared sensor detects that no one is watching the projection, stopping timing; when the user returns, the infrared sensor detects that someone watches the projection again, and the time interval of the user returning when the user goes out is recorded.
If the time interval is greater than the preset interval threshold, it indicates that the eyes of the user have been sufficiently rested during the time when the user is out and does not watch the projection, and the recording of the watching time length of the user can be restarted.
If the time interval is smaller than the preset interval threshold, it indicates that the eyes of the user cannot have a full rest in the period of time when the user goes out and does not watch the projection, and the watching duration of the user cannot be recorded again.
And the projection module 400 is configured to sequentially project pictures with different sizes and different colors when the watching duration exceeds the target duration.
Specifically, when the watching time length is recorded to be longer than the target time length, the time that the eye muscles of the user are in a fatigue state is recorded to be longer than the target time length, and the eye fatigue of the user needs to be relieved to prevent myopia from being caused. At this time, pictures with different sizes and different colors can be projected and displayed on the projection screen in sequence. The projection display has different sizes, so that the eyes of the user can move unconsciously along with the change of the display content, the purpose of moving the eyeballs and the eye muscles of the user is achieved, and the eye fatigue of the user is relieved; the projection display of pictures with different colors, such as green and blue pictures, can make the eyes of users feel comfortable, and can also help to relieve the eye fatigue of users, thereby reducing the myopia problem caused by the eye fatigue and protecting the eyes of users.
In this embodiment, when the duration of watching the projection exceeds the duration of the target, the pictures with different sizes and different colors are projected and displayed on the projection screen in sequence, so that the eyes of the user can move unconsciously along with the change of the display content, the purpose of moving the eyeballs and the eye muscles of the user is achieved, the eyestrain of the user is relieved, the myopia problem caused by the eyestrain is further reduced, and the eyes of the user are protected.
Preferably, the distance acquisition module 100 includes:
a first distance obtaining unit 110, configured to obtain a first distance between the projection apparatus and the projection screen;
an orientation obtaining unit 120 configured to obtain orientation information of the user;
a second distance obtaining unit 130, configured to obtain a second distance between the projection apparatus and the user;
a third distance obtaining unit 140, configured to obtain a distance between the user and the projection screen according to the first distance, the second distance, and the orientation information.
Specifically, when a special projection curtain is not arranged and a distance sensor cannot be mounted on the projection curtain, the distance sensor and a position sensor can be arranged on the intelligent desk lamp, a first distance between the projection device and the projection screen is obtained through the distance sensor arranged on the intelligent desk lamp, and the projection device is arranged on the intelligent desk lamp; and a second distance from the user is acquired through a distance sensor arranged on the intelligent desk lamp, and the direction information of the user relative to the intelligent desk lamp is acquired through a position sensor arranged on the intelligent desk lamp.
After the azimuth information of the user and the intelligent desk lamp is obtained, a right-angled triangle is constructed by taking a connecting line of the intelligent desk lamp and the position of the user as a hypotenuse, and the second distance is the length of the hypotenuse; and according to the direction information of the user and the intelligent desk lamp, the angle information of the hypotenuse and the horizontal right-angle side in the constructed right-angle triangle is obtained. According to the angle information and the length (second distance) of the hypotenuse, the length information of the other two right-angle sides in the constructed right-angle triangle can be calculated.
After the lengths of the other two right-angle sides in the constructed right-angle triangle are obtained, the distance between the user and the intelligent desk lamp can be obtained according to the length of one right-angle side and the first distance between the intelligent desk lamp and the projection screen.
Illustratively, the floor of a room is taken as a plane, the length direction of the floor is defined as the horizontal direction, and the width direction of the floor is defined as the vertical direction. Assuming that the first distance between the intelligent desk lamp and the projection screen is the distance in the vertical direction, the first distance is added with the length of a right-angle side in the vertical direction in the right-angled triangle, and the distance between the user and the intelligent desk lamp is the first distance. Assuming that the first distance between the intelligent desk lamp and the projection screen is the distance in the horizontal direction, the first distance is added with the length of a right-angle side in the horizontal direction in the right-angled triangle, and the distance is the distance between the user and the intelligent desk lamp.
In the scheme, the distance between the user and the projection screen can be accurately obtained by the arranged distance sensor and the arranged position sensor when the projection screen is not arranged, so that more accurate target duration can be obtained, and the user is prevented from overusing eyestrain, so that the eyes of the user can be better protected.
Preferably, the method further comprises the following steps:
a picture acquiring module 500, configured to acquire a large number of pictures;
specifically, a large number of pictures can be collected in various picture libraries on the network, and the large number of pictures collected from the network can be subjected to some filtering and screening to screen out some unsuitable pictures, such as pictures with low resolution, pictures with unsuitable content, pictures with unsuitable color, and the like.
The sorting module 600 is configured to arrange the plurality of pictures in order according to a preset rule and the picture colors corresponding to the plurality of pictures;
specifically, the preset rule refers to a rule established in advance according to human eye characteristics and medical information, such as how much the scaling ratio between every two continuously projected pictures is when the pictures are projected; when a picture is projected, the color sequence of the projected pictures, that is, what color picture is projected first, what color picture is projected second, and the like.
After a preset rule is formulated according to the characteristics of human eyes and medical information, the colors of the obtained pictures can be sequenced according to the formulated preset rule. Exemplarily, it is assumed that all the collected pictures contain four colors in total, namely a first color, a second color, a third color and a fourth color; the preset rule is that the projection is carried out in sequence according to a first color, a second color, a third color and a fourth color; the pictures are circularly arranged according to the colors of the pictures in sequence of the first color, the second color, the third color and the fourth color.
The zooming module 700 is configured to perform zooming processing with different proportions on the sorted pictures according to the preset rule;
specifically, after the pictures are circularly arranged according to the color rules, the pictures after being sorted are scaled according to the preset rules in different proportions. In order to form a gradually-changing effect of gradually increasing or decreasing during the projection of the picture, the second picture, the third picture and the fourth picture need to be scaled in different proportions by taking the first picture as a reference.
For example, in the first cycle of four color pictures, the second picture is reduced by 10%, the third picture is reduced by 20%, the fourth picture is reduced by 30%, and the fifth picture is reduced by 40% with respect to the first picture. In the second cycle of the four color pictures, the third picture is reduced by 10%, the second picture is reduced by 20%, and the first picture is reduced by 30%, based on the fourth picture.
After the processing, a gradual change process that the picture is firstly reduced and then increased can be formed in the process of picture projection.
A storage module 800, configured to store the zoomed pictures in a picture library according to an arrangement order.
Specifically, after the above-described processing is performed on a large number of acquired pictures, the processed pictures are sequentially stored in the constructed picture library in the order of the previous arrangement. When projection is needed, pictures can be taken from the picture library in sequence for projection.
In the scheme, the pictures are processed in advance, so that when the pictures are projected, the pictures are directly transferred according to the storage sequence, the gradual change effect can be realized by the projection processing effect, the pictures do not need to be zoomed at any time during projection, and the projection efficiency is improved.
Preferably, the projection module 400 includes:
a picture extracting unit 410, configured to, when the viewing duration exceeds the target duration, sequentially extract pictures with different sizes and different colors from the picture library according to an arrangement order of the pictures;
a position changing unit 420, configured to sequentially project the extracted pictures in the extraction order, and change the projection positions of the pictures when projecting.
Specifically, when the recorded viewing duration exceeds the target duration, pictures of different sizes and different colors can be directly and sequentially extracted from a picture library constructed in advance according to the storage sequence of the pictures. In the picture library, the pictures are arranged according to different colors and different sizes, so that the directly extracted pictures are the pictures with different sizes and different colors, and other processing is not needed.
After pictures with different sizes and different colors are extracted from the picture library, the extracted pictures can be directly projected. Since the size of the projection screen is fixed, when the size of the picture is different (different in size), the size of the picture displayed on the projection screen is also different. For example, the first picture is projected and displayed in full screen, the second picture is projected and occupies 90% of the projection screen, and the third picture is projected and occupies 80% of the projection screen. The multiple pictures with different sizes are projected in sequence, so that a gradually-changing effect which gradually becomes smaller can be formed, and the formed gradually-changing effect can form visual distance so as to simulate the effect that a user observes objects with different distances by continuously adjusting the focal length when the user uses eyes outdoors, thereby relieving the visual fatigue of the user and protecting the eye health of the user.
In addition, when a certain group of pictures are projected, the projection positions of the pictures can be changed, for example, the projection positions of the pictures can be adjusted up, down, left and right, so that the eyeballs of the user can move along with the change of the projection positions of the pictures, and the purpose of moving the eyeballs and the eye muscles is achieved.
Preferably, the method further comprises the following steps:
a light intensity collecting module 900, configured to collect light intensity values of the surrounding environment when the viewing duration exceeds the target duration;
the light source starting module 1000 is configured to start the auxiliary lighting light source when the light intensity value is lower than a preset light intensity threshold value.
Specifically, when the watching duration of the user exceeds the target duration, if the light intensity value of the collected surrounding environment is lower than the preset light intensity threshold value, indoor light needs to be adjusted, so that the user is in comfortable light when relieving eye fatigue, and the eye comfort of the user is improved.
The indoor light is adjusted mainly by adjusting the auxiliary lighting source on the intelligent desk lamp. The intelligent desk lamp is provided with a main lighting source and an auxiliary lighting source, and the main lighting source is mainly used for providing a lighting source for a user when the user reads books and learns. The auxiliary lighting light source is mainly used for adjusting the brightness of indoor light, and is a relatively soft light source.
In this scheme, when the picture through projection equidimension not, different colours, through the light brightness in the regulation room to make user's eyes be in under comparatively comfortable lighting environment, and then improve user's eye comfort level, so that better alleviate user with eye fatigue.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A projection display method, comprising:
acquiring the distance between a user and a projection screen;
acquiring a target time length corresponding to the distance from a preset database;
recording the watching duration of the user watching the projection;
and when the watching duration exceeds the target duration, sequentially projecting pictures with different sizes and different colors.
2. The projection display method according to claim 1, wherein the obtaining a distance between the user and the projection screen specifically comprises:
acquiring a first distance between a projection device and the projection screen;
acquiring azimuth information of the user and a second distance between the projection device and the user;
and acquiring the distance between the user and the projection screen according to the first distance, the second distance and the azimuth information.
3. A projection display method according to claim 1 or 2, wherein said obtaining the distance between the user and the projection screen further comprises:
acquiring a large number of pictures;
arranging the pictures in sequence according to a preset rule and the picture colors corresponding to the pictures;
according to the preset rule, zooming processing with different proportions is carried out on each sequenced picture;
and storing the zoomed pictures in a picture library according to the arrangement sequence.
4. The projection display method according to claim 3, wherein, when the viewing duration exceeds the target duration, sequentially projecting pictures of different sizes and different colors in sequence specifically comprises:
when the watching duration exceeds the target duration, sequentially extracting pictures with different sizes and different colors from the picture library according to the arrangement sequence of the pictures;
and projecting the extracted pictures in sequence according to the extraction sequence, and changing the projection positions of the pictures during projection.
5. A projection display method according to claim 1, further comprising:
when the watching duration exceeds the target duration, acquiring the light intensity value of the surrounding environment;
and when the light intensity value is lower than a preset light intensity threshold value, starting the auxiliary lighting light source.
6. A projection display device, comprising:
the distance acquisition module is used for acquiring the distance between a user and the projection screen;
the target duration acquisition module is used for acquiring the target duration corresponding to the distance from a preset database;
the watching duration recording module is used for recording the watching duration of the projection watched by the user;
and the projection module is used for sequentially projecting pictures with different sizes and different colors when the watching duration exceeds the target duration.
7. The projection display device of claim 6, wherein the distance acquisition module comprises:
the first distance acquisition unit is used for acquiring a first distance between the projection device and the projection screen;
an orientation acquisition unit configured to acquire orientation information of the user;
a second distance obtaining unit, configured to obtain a second distance between the projection apparatus and the user;
and the third distance acquisition unit is used for acquiring the distance between the user and the projection screen according to the first distance, the second distance and the azimuth information.
8. A projection display device according to claim 6 or 7, further comprising:
the image acquisition module is used for acquiring a large number of images;
the ordering module is used for arranging the pictures in sequence according to a preset rule and the picture colors corresponding to the pictures;
the zooming module is used for zooming the sequenced pictures in different proportions according to the preset rule;
and the storage module is used for storing the zoomed pictures in a picture library according to the arrangement sequence.
9. A projection display device according to claim 8, wherein the projection module comprises:
the picture extracting unit is used for sequentially extracting pictures with different sizes and different colors from the picture library according to the arrangement sequence of the pictures when the watching duration exceeds the target duration;
and the position changing unit is used for sequentially projecting the extracted pictures according to the extraction sequence and changing the projection positions of the pictures during projection.
10. A projection display device according to claim 6, further comprising:
the light intensity acquisition module is used for acquiring the light intensity value of the surrounding environment when the watching time length exceeds the target time length;
and the light source starting module is used for starting the auxiliary lighting light source when the light intensity value is lower than a preset light intensity threshold value.
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