CN110824822B - Brightness adjusting method and device for projector curtain - Google Patents
Brightness adjusting method and device for projector curtain Download PDFInfo
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- CN110824822B CN110824822B CN201911318863.2A CN201911318863A CN110824822B CN 110824822 B CN110824822 B CN 110824822B CN 201911318863 A CN201911318863 A CN 201911318863A CN 110824822 B CN110824822 B CN 110824822B
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- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
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- G03B21/2053—Intensity control of illuminating light
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Abstract
The invention relates to a method and a device for adjusting the brightness of a projector curtain, comprising the following steps: acquiring an illumination intensity value in the environment, comparing the illumination intensity value with a preset illumination intensity value to obtain a first comparison result, if the first comparison result is that the illumination intensity value is smaller than the preset illumination intensity value, adjusting the brightness of the projector screen, if the first comparison result is that the illumination intensity value is larger than the preset illumination intensity value, capturing a projection distance value between the projector screen and the projector, comparing the projection distance value with the preset projection distance value to obtain a second comparison result, if the second comparison result is that the projection distance value is smaller than the preset projection distance value, adjusting the brightness of the projector screen, if the second comparison result is that the projection distance value is larger than the preset projection distance value, collecting projection information, and identifying the content in the projection information, according to the content of the projection information, the brightness of the projector curtain is adjusted according to the preset rule, and the accurate adjustment of the required illumination intensity is realized.
Description
Technical Field
The invention relates to the technical field of projectors, in particular to a method and a device for adjusting the brightness of a projector curtain.
Background
The projector, also known as a projector, is an optical instrument which utilizes an optical element to amplify the outline of a workpiece and project the workpiece onto a screen, can be connected with a computer, a video compact disc, a digital video disc, a blue-ray film, a game machine, and the like through different interfaces to play corresponding video signals, is widely applied to families, offices, schools and entertainment places at present, and has different types such as a three-gun projector, a liquid crystal projector, a digital light processing projector, and the like according to different working modes.
At present, most of projection brightness adjustment of existing projectors is to acquire illumination intensity information in an environment through a sensor and then control the projector to emit illumination with different brightness, but the brightness adjustment is often not accurate enough.
Disclosure of Invention
In view of the above, the present invention provides a method and an apparatus for adjusting brightness of a projector curtain, so as to achieve accurate adjustment of required illumination intensity.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method of brightness adjustment of a projector screen, the method comprising:
acquiring an illumination intensity value in an environment;
comparing the illumination intensity value with a preset illumination intensity value to obtain a first comparison result;
if the first comparison result is that the illumination intensity value is smaller than the preset illumination intensity value, reducing the brightness of the projector curtain;
if the first comparison result is that the illumination intensity value is larger than the preset illumination intensity value, capturing a projection distance value between the projector curtain and the projector;
comparing the projection distance value with a preset projection distance value to obtain a second comparison result;
if the second comparison result is that the projection distance value is smaller than the preset projection distance value, reducing the brightness of the projector curtain;
if the second comparison result is that the projection distance value is larger than the preset projection distance value, acquiring projection information;
identifying content in the projection information;
and adjusting the brightness of the projector curtain according to a preset rule according to the content of the projection information.
Optionally, the capturing a projection distance value between the projector curtain and the projector includes:
and capturing the distance between the projector and the projector curtain through an infrared distance measuring device or a laser distance measuring device.
Optionally, the identifying the content in the projection information includes:
detecting the change rate of the display content to obtain a detection result;
comparing the detection result with a preset threshold value;
if the detection result is larger than the preset threshold value, determining that the content is a video;
and if the detection result is smaller than or equal to the preset threshold value, determining that the content is a character.
Optionally, the identifying the content in the projection information includes:
detecting an information carrier corresponding to the projection information when the terminal equipment performs projection;
determining the type of the information carrier;
determining content in the projection information according to the type of the information carrier, wherein the content comprises characters and/or videos.
Optionally, the adjusting the brightness of the projector curtain according to the preset rule includes:
if the content in the projection information is characters, reducing the brightness of the projector curtain;
and if the content in the projection information is a video, increasing the brightness of the projector curtain.
A brightness adjustment apparatus for a projector screen, the apparatus comprising:
an acquisition module: the system comprises a light source, a light source and a controller, wherein the light source is used for obtaining illumination intensity values in an environment;
a first comparison module: the device is used for comparing the illumination intensity value with a preset illumination intensity value to obtain a first comparison result;
a first adjustment module: the brightness of the projector curtain is reduced if the first comparison result shows that the illumination intensity value is smaller than the preset illumination intensity value;
a capture module: the projector screen is used for capturing a projection distance value between the projector screen and the projector if the first comparison result shows that the illumination intensity value is greater than the preset illumination intensity value;
a second comparison module: the projection distance value is used for comparing the projection distance value with a preset projection distance value to obtain a second comparison result;
a second adjustment module: if the second comparison result is that the projection distance value is smaller than the preset projection distance value, the brightness of the projector curtain is reduced;
an acquisition module: the projection information acquisition unit is used for acquiring projection information if the second comparison result is that the projection distance value is greater than the preset projection distance value;
an identification module: for identifying content in the projection information;
a third adjusting module: and the brightness of the projector curtain is adjusted according to the content of the projection information and a preset rule.
Optionally, the capture module is specifically configured to:
and capturing the distance between the projector and the projector curtain through an infrared distance measuring device or a laser distance measuring device.
Optionally, the identification module is specifically configured to:
detecting the change rate of the display content to obtain a detection result;
comparing the detection result with a preset threshold value;
if the detection result is larger than the preset threshold value, determining that the content is a video;
and if the detection result is smaller than or equal to the preset threshold value, determining that the content is a character.
Optionally, the identification module is further specifically configured to:
detecting an information carrier corresponding to the projection information when the terminal equipment performs projection;
determining the type of the information carrier;
determining content in the projection information according to the type of the information carrier, wherein the content comprises characters and/or videos.
Optionally, the third adjusting module is specifically configured to:
if the content in the projection information is characters, reducing the brightness of the projector curtain;
and if the content in the projection information is a video, increasing the brightness of the projector curtain.
The invention discloses a brightness adjusting method of a projector curtain, which comprises the following steps: the method comprises the steps of obtaining an illumination intensity value in the environment sent by a sensor, comparing the illumination intensity value with a preset illumination intensity value to obtain a first comparison result, if the first comparison result is that the illumination intensity value is smaller than the preset illumination intensity value, reducing the brightness of a projector curtain, if the first comparison result is that the illumination intensity value is larger than the preset illumination intensity value, capturing a projection distance value between the projector curtain and a projector, comparing the projection distance value with the preset projection distance value to obtain a second comparison result, if the second comparison result is that the projection distance value is smaller than the preset projection distance value, reducing the brightness of the projector curtain, if the second comparison result is that the projection distance value is larger than the preset projection distance value, collecting projection information, identifying content in the projection information, and adjusting the brightness of the projector curtain according to a preset rule according to the content of the projection information. Through obtaining illumination intensity value, catch the projection distance value, gather projection information, discernment projection content, three kinds of mode combinations realize adjusting different curtain luminance according to the different situation for adjustment to luminance is more accurate, adjusts reflection of light luminance through the information projection curtain in addition, also carries out luminance control more accurate than the illumination intensity who sends through the projector regulation alone, has increased user's experience sense to a certain extent.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of a method for adjusting brightness of a projector screen according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a brightness adjustment device of a projector curtain according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Fig. 1 is a flowchart of a method for adjusting brightness of a projector screen according to an embodiment of the present invention.
As shown in fig. 1, a method for adjusting brightness of a projector curtain of the present embodiment includes the following steps:
and S11, acquiring the illumination intensity value in the environment.
Usually, a sensor is selected to obtain an illumination intensity value in an environment, and the illumination intensity value directly affects the definition of projection imaging, so that the brightness of a projector curtain needs to be adjusted according to the illumination intensity value to achieve the purpose of adjusting to the required brightness according to actual requirements. After the sensor acquires the illumination intensity value in the environment, the processor acquires the illumination intensity value from the sensor, and then the processor acquires the illumination intensity value in the environment.
For example, an HA2003 illumination sensor is selected to obtain an illumination intensity value, the sensor adopts an advanced photoelectric conversion module to convert the illumination intensity value into a voltage value, and the voltage value is converted into 0-2V by a conditioning circuit. And the sensor has the following characteristics: the high-precision illumination intensity measurement device is small in size, IP65 protection level design and high in corrosion resistance response speed, voltage or current output can be selected within 1 second, signal attenuation does not exist when the current output is transmitted by a long cable, and real sunlight is adopted for calibration, so that the influence of a light source is minimum, the technical specification and the error are +/-5%.
And S12, comparing the illumination intensity value with the preset illumination intensity value to obtain a first comparison result.
The acquired illumination intensity value is compared with a preset illumination intensity value, the size of the preset illumination intensity value can be set manually, the size of the preset illumination intensity value can be selected according to actual requirements, in order to ensure that the observed projection content is clearer, a smaller preset illumination intensity value can be selected generally, the preset illumination intensity value setting method is not limited specifically, and can be adjusted by pressing keys or can be adjusted by software.
S13, if the first comparison result is that the illumination intensity value is smaller than the preset illumination intensity value, the brightness of the projector curtain is reduced
When first comparison result is that illumination intensity value is less than predetermineeing illumination intensity value, it is just also shown that illumination at this moment is relatively weak, it is darker to be equated to illumination, no matter from clear angle or from the eyeshield angle, all can select to carry out appropriate the accent with the luminance of projecting apparatus curtain and reduce for the user can enough clear watching projected content, also can carry out the protection of certain degree to the eyesight of oneself, when illumination intensity value equals predetermineeing illumination intensity value, also reduce the luminance of projecting apparatus curtain, the user selects by oneself.
And S14, if the first comparison result is that the illumination intensity value is larger than the preset illumination intensity value, capturing a projection distance value between the projector curtain and the projector.
When first comparison result is that illumination intensity value is greater than when predetermineeing illumination intensity value, for making more accurate to luminance adjustment this moment, select to catch the distance value of projecting apparatus curtain and projecting apparatus, the far and near also can influence projected definition degree of distance to a great extent, under certain projection illumination, under the condition of certain projecting apparatus curtain luminance, the projection content is more clear more near the distance, otherwise definition degree can decline. The mode of catching projecting apparatus curtain and projecting apparatus distance includes: by means of an infrared distance measuring device or a laser distance measuring device.
The infrared distance measuring sensor is a sensing device, is a measuring system using infrared rays as a medium, and has the advantages of wide measuring range and short response time. The infrared distance measuring sensor is provided with a pair of infrared signal transmitting and receiving diodes, a beam of infrared light is transmitted by the infrared distance measuring sensor LDM301, a reflecting process is formed after the infrared distance measuring sensor LDM irradiates an object, the infrared distance measuring sensor LDM reflects the infrared signal to the sensor and receives the signal, then the photoelectric coupling device is used for image processing, the data of the time difference between transmitting and receiving is received, the distance of the object is calculated after the data is processed by the signal processor, the measuring distance is long, the frequency response is high, and the infrared distance measuring sensor is suitable for severe industrial environments. In addition, the device also has the characteristics of remote measurement, capability of measuring a longer distance under the conditions of no reflector and low reflectivity, synchronous input end, capability of synchronously measuring a plurality of sensors, wide measurement range, short response time, compact appearance design, easiness in installation and convenience in operation.
The laser ranging sensor is characterized in that a laser diode is aligned to a target to emit laser pulses, the laser pulses are reflected by the target and then scattered in all directions, part of scattered light returns to a sensor receiver and is received by an optical system and then imaged on an avalanche photodiode, and the avalanche photodiode is an optical sensor with an amplifying function inside and can detect extremely weak optical signals. The time from the emission of the light pulse to the return to be received is recorded and processed, i.e. the target distance can be determined. For example, a ZYT-0100 model sensor is selected, a data transmission mode adopts RS232/RS422, the sensor can realize area detection control and output switching value or level signals, and the sensor has the characteristics of wide measurement range, high response speed, no need of a reflector for remote measurement, high measurement precision and large range, the 905 nanometer safety laser is harmless to human eyes, the size is small, the installation and debugging are convenient, and the online continuous measurement can achieve unattended continuous monitoring. It should be noted that the infrared distance measurement or the laser distance measurement is only an example of the embodiment, and is not limited in the actual process, and the principle of the present invention is adopted, and the present invention is within the protection scope of the present invention.
And S15, comparing the projection distance value with a preset projection distance value to obtain a second comparison result.
In order to adjust the illumination intensity more accurately, after the projection distance value is measured, the projection distance value is selected to be compared with a preset projection distance value, similar to the above steps, it should be noted that a user with the preset projection distance value may select according to an actual situation, and a method for setting the preset projection distance value includes key adjustment or software input, and here, no specific limitation is also made.
And S16, if the second comparison result is that the projection distance value is smaller than the preset projection distance value, reducing the brightness of the projector curtain.
And S17, if the second comparison result is that the projection distance value is larger than the preset projection distance value, acquiring projection information.
For example, a preset projection distance value is set to be 3 meters, and when the measured projection distance value is 2 meters, it is indicated that the projection distance is very short, and the projection distance does not affect the projection definition to a great extent, so that the brightness of the screen of the projector can be properly adjusted to be low, and the user can be ensured to clearly view the projection content. When the projection distance value is 5 meters, the projection distance value is greater than the preset projection distance value, the brightness of the projector curtain is simply adjusted in a distance mode, the projection definition cannot be fully guaranteed, in order to enable the adjustment of the brightness to be more accurate, the collected projection information is selected, and the required brightness is adjusted according to the projection information.
And S18, identifying the content in the projection information.
In this embodiment, the change rate of the display content may be detected to obtain a detection result, the detection result is compared with a preset threshold, if the detection result is greater than the preset threshold, the content is determined to be a video, and if the detection result is less than or equal to the preset threshold, the content is determined to be a text. The processor detects the change condition of the projection content through the projector screen, wherein the change rate is the change condition within the specified time, for example, the change condition of the content displayed by the projector screen within 5 seconds, if the change is repeated within 5 seconds, the projected content is a video, and if the change is not performed within 5 seconds, the projected content is a character or a slide, at the moment, whether the video is the character or the character can be judged according to the change rate condition, the brightness requirements of the video and the character on the projector screen have certain difference, and the brightness can be adjusted more accurately by respectively treating the video and the character.
In this embodiment, when the terminal device performs projection, the information carrier corresponding to the projection information may be detected, the type of the information carrier is determined, and the content in the projection information is determined according to the type of the information carrier, where the content includes text and/or video. The information carrier is used for judging the type of the information carrier and determining the content in the projection information according to the type of the information carrier. The projection usually selects to put the content in the terminal device on the projector curtain, the terminal device includes a mobile phone, a computer, a tablet and other devices, and the type of the information carrier is determined by detecting the information carrier used by the terminal device during projection, so that the projected content can be clearly known by the type, for example, the projected content can be determined by detecting that the information carrier used by the terminal device is office software such as Word, PPT, Excel and the like, and the projected content can be determined as a video when the information carrier used by the terminal device is a video player, and the projected content can be more clearly determined as a video when the information carrier used by the terminal device is detected as a video player and the audio player is in a working state.
The projected content is determined to be text or video through two modes, it is noted that the mode for determining the projected content is not limited to the above two modes, and is not specifically limited herein, and in the specific implementation process, as long as the principle of the invention is adopted, the projected content belongs to the protection scope of the invention, and the accuracy of brightness adjustment can be better ensured through identifying whether the projected content is text or video due to the requirements of different definitions.
And S19, adjusting the brightness of the projector curtain according to the preset rule according to the content of the projection information.
If the content in the projection information is characters, the brightness of the projector screen is reduced, if the content in the projection information is videos, the brightness of the projector screen is increased, and the adjusting the brightness of the projector screen comprises the following steps: the adjustment is performed manually or automatically. Adjust its reflection of light nature can be adjusted to the luminance of projecting apparatus curtain, guarantees the projected definition according to the power of reflection of light, also including the colour of adjusting the projecting apparatus curtain, different projection content is shown to different colours. For example, a large-area liquid crystal screen can be selected to serve as a projector screen in a meeting room, and the definition can be better ensured by adjusting the brightness at the moment.
Adjusting the brightness of the projector screen according to a preset rule comprises receiving a first adjusting instruction input by a user and adjusting the brightness of the projector screen; or generating a second adjusting instruction, and adjusting the brightness of the projector screen, namely automatically adjusting the brightness of the projector screen and manually adjusting the brightness of the projector screen.
The method for adjusting the brightness of the projector curtain adopted by the embodiment comprises the following steps: the method comprises the steps of obtaining an illumination intensity value in the environment sent by a sensor, comparing the illumination intensity value with a preset illumination intensity value to obtain a first comparison result, if the first comparison result is that the illumination intensity value is smaller than the preset illumination intensity value, reducing the brightness of a projector curtain, if the first comparison result is that the illumination intensity value is larger than the preset illumination intensity value, capturing a projection distance value between the projector curtain and a projector, comparing the projection distance value with the preset projection distance value to obtain a second comparison result, if the second comparison result is that the projection distance value is smaller than the preset projection distance value, reducing the brightness of the projector curtain, if the second comparison result is that the projection distance value is larger than the preset projection distance value, collecting projection information, identifying content in the projection information, and adjusting the brightness of the projector curtain according to a preset rule according to the content of the projection information. Through obtaining illumination intensity value, catch the projection distance value, gather projection information, discernment projection content, three kinds of mode combinations realize adjusting different curtain luminance according to the different situation for adjustment to luminance is more accurate, adjusts reflection of light luminance through the information projection curtain in addition, also carries out luminance control more accurate than the illumination intensity who sends through the projector regulation alone, has increased user's experience sense to a certain extent.
Fig. 2 is a schematic structural diagram of a brightness adjustment device of a projector curtain according to an embodiment of the present invention.
As shown in fig. 2, a brightness adjusting apparatus for a projector screen of the present embodiment includes:
the acquisition module 11: the system comprises a light source, a light source and a controller, wherein the light source is used for obtaining illumination intensity values in an environment;
the first comparison module 12: the device is used for comparing the illumination intensity value with a preset illumination intensity value to obtain a first comparison result;
the first regulation module 13: the projector curtain brightness adjusting device is used for adjusting the brightness of the projector curtain down if the first comparison result is that the illumination intensity value is smaller than the preset illumination intensity value;
the capture module 14: the projector screen is used for capturing a projection distance value between the projector screen and the projector if the first comparison result shows that the illumination intensity value is greater than the preset illumination intensity value;
the second comparing module 15: the projection distance value is used for comparing the projection distance value with a preset projection distance value to obtain a second comparison result;
the second adjustment module 16: if the second comparison result is that the projection distance value is smaller than the preset projection distance value, the brightness of the projector curtain is reduced;
the acquisition module 17: the projection information acquisition module is used for acquiring projection information if the second comparison result is that the projection distance value is larger than the preset projection distance value;
the identification module 18: for identifying content in the projection information;
the third regulation module 19: and the projector screen is used for adjusting the brightness of the projector screen according to the content of the projection information and preset rules.
Further, the capture module is specifically configured to:
the distance between the projector and the projector screen is captured by the infrared distance measuring device or the laser distance measuring device.
Further, the identification module is specifically configured to:
detecting the change rate of the display content to obtain a detection result;
comparing the detection result with a preset threshold value;
if the detection result is larger than a preset threshold value, determining the content as a video;
and if the detection result is less than or equal to the preset threshold value, determining the content as characters.
Further, the identification module is further specifically configured to:
detecting an information carrier corresponding to projection information when the terminal equipment performs projection;
determining the type of the information carrier;
the content in the projection information is determined on the basis of the type of information carrier, the content comprising text and/or video.
Further, the third adjusting module is specifically configured to:
if the content in the projection information is characters, the brightness of the projector screen is reduced;
and if the content in the projection information is a video, the brightness of the projector screen is increased.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that the terms "first," "second," and the like in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present invention, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A method of adjusting brightness of a projector screen, the method comprising:
acquiring an illumination intensity value in an environment;
comparing the illumination intensity value with a preset illumination intensity value to obtain a first comparison result;
if the first comparison result is that the illumination intensity value is smaller than the preset illumination intensity value, reducing the brightness of the projector curtain;
if the first comparison result is that the illumination intensity value is larger than the preset illumination intensity value, capturing a projection distance value between the projector curtain and the projector;
comparing the projection distance value with a preset projection distance value to obtain a second comparison result;
if the second comparison result is that the projection distance value is smaller than the preset projection distance value, reducing the brightness of the projector curtain;
if the second comparison result is that the projection distance value is larger than the preset projection distance value, acquiring projection information;
identifying content in the projection information;
and adjusting the brightness of the projector curtain according to a preset rule according to the content of the projection information.
2. The brightness adjustment method according to claim 1, wherein capturing the projection distance value of the projector curtain from the projector comprises:
and capturing the distance between the projector and the projector curtain through an infrared distance measuring device or a laser distance measuring device.
3. The brightness adjustment method according to claim 1, wherein the identifying the content in the projection information comprises:
detecting the change rate of the display content to obtain a detection result;
comparing the detection result with a preset threshold value;
if the detection result is larger than the preset threshold value, determining that the content is a video;
and if the detection result is smaller than or equal to the preset threshold value, determining that the content is a character.
4. The brightness adjustment method according to claim 1, wherein the identifying the content in the projection information comprises:
detecting an information carrier corresponding to the projection information when the terminal equipment performs projection;
determining the type of the information carrier;
determining content in the projection information according to the type of the information carrier, wherein the content comprises characters and/or videos.
5. The brightness adjustment method according to claim 3 or 4, wherein the adjusting the brightness of the projector screen according to the preset rule comprises:
if the content in the projection information is characters, reducing the brightness of the projector curtain;
and if the content in the projection information is a video, increasing the brightness of the projector curtain.
6. A brightness adjustment apparatus for a projector screen, the apparatus comprising:
an acquisition module: the system comprises a light source, a light source and a controller, wherein the light source is used for obtaining illumination intensity values in an environment;
a first comparison module: the device is used for comparing the illumination intensity value with a preset illumination intensity value to obtain a first comparison result;
a first adjustment module: the brightness of the projector curtain is reduced if the first comparison result shows that the illumination intensity value is smaller than the preset illumination intensity value;
a capture module: the projector screen is used for capturing a projection distance value between the projector screen and the projector if the first comparison result shows that the illumination intensity value is greater than the preset illumination intensity value;
a second comparison module: the projection distance value is used for comparing the projection distance value with a preset projection distance value to obtain a second comparison result;
a second adjustment module: if the second comparison result is that the projection distance value is smaller than the preset projection distance value, the brightness of the projector curtain is reduced;
an acquisition module: the projection information acquisition unit is used for acquiring projection information if the second comparison result is that the projection distance value is greater than the preset projection distance value;
an identification module: for identifying content in the projection information;
a third adjusting module: and the brightness of the projector curtain is adjusted according to the content of the projection information and a preset rule.
7. The brightness adjustment apparatus according to claim 6, wherein the capturing module is specifically configured to:
and capturing the distance between the projector and the projector curtain through an infrared distance measuring device or a laser distance measuring device.
8. The brightness adjustment device according to claim 6, wherein the identification module is specifically configured to:
detecting the change rate of the display content to obtain a detection result;
comparing the detection result with a preset threshold value;
if the detection result is larger than the preset threshold value, determining that the content is a video;
and if the detection result is smaller than or equal to the preset threshold value, determining that the content is a character.
9. The brightness adjustment apparatus according to claim 6, wherein the identification module is further specifically configured to:
detecting an information carrier corresponding to the projection information when the terminal equipment performs projection;
determining the type of the information carrier;
determining content in the projection information according to the type of the information carrier, wherein the content comprises characters and/or videos.
10. The brightness adjustment device according to claim 8 or 9, wherein the third adjustment module is specifically configured to:
if the content in the projection information is characters, reducing the brightness of the projector curtain;
and if the content in the projection information is a video, increasing the brightness of the projector curtain.
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| CN201911318863.2A CN110824822B (en) | 2019-12-19 | 2019-12-19 | Brightness adjusting method and device for projector curtain |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911318863.2A CN110824822B (en) | 2019-12-19 | 2019-12-19 | Brightness adjusting method and device for projector curtain |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103634968A (en) * | 2012-08-23 | 2014-03-12 | 联想(北京)有限公司 | Backlight control method and apparatus |
| US9347828B1 (en) * | 2014-11-27 | 2016-05-24 | Hui Zhao | Method for detecting ambient light brightness and apparatus for achieving the method |
| CN205750263U (en) * | 2016-05-13 | 2016-11-30 | 江苏海事职业技术学院 | A kind of projector curtain regulating brightness |
| CN106713640A (en) * | 2016-12-27 | 2017-05-24 | 努比亚技术有限公司 | Brightness adjustment method and device |
| CN109036235A (en) * | 2018-09-10 | 2018-12-18 | 天津大学 | Automatic brightness adjustment projector |
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2019
- 2019-12-19 CN CN201911318863.2A patent/CN110824822B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103634968A (en) * | 2012-08-23 | 2014-03-12 | 联想(北京)有限公司 | Backlight control method and apparatus |
| US9347828B1 (en) * | 2014-11-27 | 2016-05-24 | Hui Zhao | Method for detecting ambient light brightness and apparatus for achieving the method |
| CN205750263U (en) * | 2016-05-13 | 2016-11-30 | 江苏海事职业技术学院 | A kind of projector curtain regulating brightness |
| CN106713640A (en) * | 2016-12-27 | 2017-05-24 | 努比亚技术有限公司 | Brightness adjustment method and device |
| CN109036235A (en) * | 2018-09-10 | 2018-12-18 | 天津大学 | Automatic brightness adjustment projector |
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