CN110290367B - Method for automatically focusing curtain of projection equipment - Google Patents
Method for automatically focusing curtain of projection equipment Download PDFInfo
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- CN110290367B CN110290367B CN201910695675.5A CN201910695675A CN110290367B CN 110290367 B CN110290367 B CN 110290367B CN 201910695675 A CN201910695675 A CN 201910695675A CN 110290367 B CN110290367 B CN 110290367B
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- 239000003999 initiator Substances 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 11
- 238000011900 installation process Methods 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/315—Modulator illumination systems
- H04N9/3161—Modulator illumination systems using laser light sources
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/317—Convergence or focusing systems
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- Optics & Photonics (AREA)
- Projection Apparatus (AREA)
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Abstract
The invention discloses a method for automatically focusing a curtain by projection equipment, which comprises a projection curtain focusing system, wherein the projection curtain focusing system comprises the projection equipment and the curtain equipment, the projection equipment and the curtain equipment are both provided with Bluetooth modules, and the method for automatically focusing the curtain by the projection equipment comprises the following steps: A. starting a projection curtain focusing system to operate; B. the projection equipment and the curtain equipment are mutually discovered and paired; C. the projection equipment automatically calculates the projection distance and the projection angle with the curtain equipment; D. and the projection equipment automatically focuses and adjusts according to the calculation result. The method can realize automatic focusing adjustment in the installation process of the projection equipment, get rid of manual operation, realize efficient and rapid installation and adjustment of the projection equipment and reduce the installation cost.
Description
Technical Field
The invention relates to the technical field of adjustment and correction of a focus of projection equipment, in particular to a method for automatically focusing a curtain by the projection equipment.
Background
In recent years, projection devices have gained popularity due to the characteristics of small size, flexible scaling of screen size, and the like, and the projection devices have been rapidly developed and applied. Common projection type devices include laser televisions, screenless televisions, projectors, and the like. Because the display principle of the projection equipment belongs to a reflection display type, the brightness and the contrast of a picture are more weak than those of the traditional self-luminous display equipment, in order to make up for the weak points, a special projection curtain is mainly adopted to reflect and display at present, the influence of ambient light on display is improved, and the brightness and the contrast of display image quality are improved.
The projection equipment and the projection curtain belong to two independent equipment, and in order to realize optimization of projection picture size and projection display effect, parameters such as focal length, projection lens angle and the like between the projection equipment and the projection curtain need to be manually adjusted, so that the installation cost of the projection equipment is increased, and the installation and debugging efficiency of the projection equipment is also reduced.
Disclosure of Invention
The invention aims to overcome the defects in the background art, and provides a method for automatically focusing a curtain of projection equipment, which can realize automatic focusing adjustment in the installation process of the projection equipment, get rid of manual operation, realize efficient and quick installation and adjustment of the projection equipment and reduce the installation cost.
In order to achieve the technical effects, the invention adopts the following technical scheme:
the method for automatically focusing the curtain by the projection equipment comprises a projection curtain focusing system, wherein the projection curtain focusing system comprises the projection equipment and curtain equipment, the projection equipment and the curtain equipment are both provided with Bluetooth modules, and the method for automatically focusing the curtain by the projection equipment comprises the following steps:
A. starting a projection curtain focusing system to operate;
B. the projection equipment and the curtain equipment are mutually discovered and paired;
C. the projection equipment automatically calculates the projection distance and the projection angle with the curtain equipment;
D. the projection equipment automatically focuses and adjusts according to the calculation result;
the method mainly comprises the steps of establishing a projection screen focusing system, measuring distance based on a projection device and a Bluetooth module of the screen device, measuring and calculating to obtain the distance and the angle between the projection device and the screen device, automatically adjusting the focal length and the pitching viewing angle of the projection device according to the distance and the angle, and achieving automatic focusing.
Further, the Bluetooth module supports Bluetooth 5.1 and above standards; compared with other distance measurement modes and modules, the Bluetooth 5.1 standard supports indoor distance measurement, the measurement precision of the Bluetooth module reaches the centimeter level, and meanwhile, the Bluetooth module also has the advantages of low power consumption and low module cost.
Furthermore, the curtain device is specifically provided with four Bluetooth modules which are respectively located at four vertex positions of the rectangular curtain, and the four vertexes are located on the same plane, specifically, the four Bluetooth modules of the curtain device can be named independently according to the positions of the vertexes of the curtain where the Bluetooth modules are located, and the vertex positions of the curtain where the Bluetooth modules are located can be determined through naming.
Further, the step a specifically includes: the projection equipment and the curtain equipment are powered on and then started to operate, and the Bluetooth modules in the equipment are started to operate, so that the Bluetooth modules are ensured to be in a discoverable and connectable operating state.
Further, the step B specifically includes: the projection equipment serves as an initiator of active discovery equipment, the four Bluetooth modules of the curtain equipment are discovered through scanning of the Bluetooth modules, key information of the four Bluetooth modules is recorded, and pairing of the projection equipment and the curtain equipment is automatically achieved.
Further, the step C specifically includes: the Bluetooth module of the projection equipment is respectively communicated with the Bluetooth modules at the four top points of the curtain equipment to acquire the distances between the Bluetooth modules at the four top points of the projection equipment and the curtain equipment, and the projection distance L between the Bluetooth modules and the curtain equipment is obtained through calculationdAnd a projection angle alpha.
Further, the projection device is located at the center of the curtain device in the horizontal direction.
Further, the length of the rectangular curtain device is L, the width is W, and the distances between the projection device and the upper left vertex and between the projection device and the upper right vertex obtained after bluetooth ranging are D1, and the distances between the projection device and the lower left vertex and between the projection device and the lower right vertex are D2, so that the distance b between the projection device and the upper top edge of the rectangular curtain device is: b2＝D1 2 -(L/2)2(ii) a The distance a between the projection device and the lower top edge of the rectangular curtain device is as follows: a is2＝D2 2-(L/2)2(ii) a Then, when the distance b between the projection device and the upper top edge of the rectangular curtain device, the distance a between the projection device and the lower top edge of the rectangular curtain device and the width W of the rectangular curtain device are known, the projection distance L of the curtain device can be obtaineddAnd a projection angle alpha.
Further, the step D specifically includes: the projection equipment projects an image to the curtain equipment by taking the projection distance as a focal length, and automatically adjusts the projection angle direction based on the included angle between the projection equipment and the curtain equipment.
Further, the projection device includes, but is not limited to, currently popular laser televisions, screenless televisions, projectors, and the like.
Compared with the prior art, the invention has the following beneficial effects:
the method for automatically focusing the screen by the projection equipment can effectively solve the problems that in the prior art, the links of focal length adjustment, picture size adjustment, projection angle adjustment and the like between the projection equipment and the projection screen need to be manually finished in the installation process of the projection equipment, so that the installation cost is high and the installation and debugging efficiency is low, can realize that the projection equipment is free from dependence on manual focusing and adjustment in the installation process, greatly reduces the installation cost and improves the installation efficiency of the projection equipment.
Drawings
FIG. 1 is a flow chart illustrating a method for automatically focusing a curtain by a projection apparatus according to the present invention.
Fig. 2 is a schematic view of the installation of a projection device and a curtain device in one embodiment of the invention.
Reference numerals: 1-projection equipment and 2-curtain equipment.
Detailed Description
The invention will be further elucidated and described with reference to the embodiments of the invention described hereinafter.
Example (b):
the first embodiment is as follows:
in the embodiment, specifically, as shown in fig. 2, the projection curtain focusing system includes a projection device 1 and a curtain device 2, a bluetooth module is embedded in the projection device 1, the projection curtain in the embodiment is rectangular, the bluetooth modules are installed at four vertices of the projection curtain, and the bluetooth modules of the projection device 1 and the curtain device 2 both support the bluetooth 5.1 standard and the above standards.
Specifically, the projection device 1 in this embodiment is a laser television, in practice, a screen-less television, a projector, and other devices may be used as the projection device 1, and in this embodiment, the projection device 1 is correspondingly located at the center of the curtain device 2 in the horizontal direction.
Specifically, in this embodiment, the bluetooth module embedded in the projection device 1 is named as "LTV-B-1", and the four bluetooth sub-modules of the projection screen are named as "TL-B" (upper left vertex), "TR-B" (upper right vertex), "BL-B" (lower left vertex), and "BR-B" (lower right vertex), respectively, according to different vertex positions.
As shown in fig. 2, the method for automatically focusing on a curtain by the projection apparatus 1 of the present embodiment specifically includes the following steps:
the method comprises the following steps: starting a projection curtain focusing system to operate;
the method specifically comprises the following steps: the laser television equipment and the curtain equipment 2 are powered on and then are started to operate, and the Bluetooth modules in the respective equipment are started to operate, so that the Bluetooth equipment is ensured to be in a discoverable and connectable operating state.
Step two: the projection device 1 and the curtain device 2 find and pair with each other;
the method specifically comprises the following steps: laser television passes through bluetooth equipment's scanning, discovers four bluetooth equipment of curtain equipment 2, and the IE name is: the laser television records key information of four Bluetooth devices in a list mode, wherein the key information comprises TL-B, TR-B, BL-B and BR-B.
Step three: the projection equipment 1 automatically calculates the projection distance and the projection angle with the curtain equipment 2;
the Bluetooth module of the laser television device is respectively communicated with the four peak Bluetooth modules of the curtain device 2 to obtain the distances between the Bluetooth module of the projection device 1 and the four peak Bluetooth modules of the curtain device 2, and the projection distance L between the projection device 1 and the curtain device 2 is calculated based on the premise that the four peaks are located on the same planedAnd a projection angle alpha.
Specifically, in this embodiment, the rectangular curtain device 2 has a length L and a width W, and the distances D between the projection device 1 and the upper left vertex and the upper right vertex are obtained after bluetooth distance measurement1The distance between the projection device 1 and the lower left vertex and the lower right vertex is D2Then, the distance b from the projection apparatus 1 to the upper top edge of the rectangular curtain apparatus 2 is: b2＝D1 2-(L/2)2(ii) a The distance a of the projection device 1 from the lower top edge of the rectangular curtain device 2 is: a is2＝D2 2-(L/2)2。
If in fig. 2 the projection source of the laser television is point a, the midpoint of the upper top edge of the curtain apparatus 2 is point B, and the midpoint of the lower top edge of the curtain apparatus 2 is point C, then in the triangle ABC, the side length of AB is B,the side length of the AC is a, the side length of the BC is W, the triangle ABC is provided with a BC altitude line along the point A, the altitude line is h, the BC midline is provided along the point A, and the midline is Ld(ii) a And the projection angle alpha between the projection equipment 1 and the curtain equipment 2 is the included angle between the high line and the middle line.
Ld 2＝h2+y2；sinα＝y/Ld；h2＝b2-x2；y2＝((W-2x)/2)2；x＝(b2-a2+W2)/2W。
Specifically, the units of the lengths in this embodiment are centimeters.
Specifically, the third step also involves judging whether the included angle is above or below the horizontal line, and the specific judgment criteria are as follows:
if a2-h2>(W/2)2If the included angle is below the horizontal line;
if a2-h2<(W/2)2If the included angle is above the horizontal line;
if a2-h2＝(W/2)2If so, the included angle is 0;
the projection distance and the projection included angle between the laser television and the curtain device 2 can be obtained through the calculation and judgment.
Step four: the projection equipment 1 automatically focuses and adjusts according to the calculation result;
specifically, the projection distance value L is obtained based on the step threedProjection device 1 projects a distance LdThe screen device 2 is projected with an image for the focal length, and the projection angle direction is automatically adjusted based on the included angle alpha between the projection device 1 and the screen device 2, so that the maximum and clearest projection picture is projected on the screen device 2.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (3)
1. A method for automatically focusing a curtain by projection equipment is characterized by comprising a projection curtain focusing system, wherein the projection curtain focusing system comprises the projection equipment and the curtain equipment, the projection equipment and the curtain equipment are both provided with Bluetooth modules, and the Bluetooth modules support the Bluetooth standards of 5.1 and above; the curtain equipment is specifically provided with four Bluetooth modules, and the four Bluetooth modules are respectively positioned at four vertex positions of the rectangular curtain; the projection equipment is positioned at the center of the curtain equipment in the horizontal direction; the method for automatically focusing the curtain by the projection equipment comprises the following steps:
A. starting a projection curtain focusing system to operate; the projection equipment and the curtain equipment are powered on and then started to operate, and the Bluetooth modules in the respective equipment are started to operate, so that the Bluetooth modules are ensured to be in a discoverable and connectable operating state;
B. the projection equipment and the curtain equipment are mutually discovered and paired; the projection equipment serves as an initiator of active discovery equipment, discovers four Bluetooth modules of the curtain equipment through scanning of the Bluetooth modules, records key information of the four Bluetooth modules, and automatically realizes pairing of the projection equipment and the curtain equipment;
C. the projection equipment automatically calculates the projection distance and the projection angle with the curtain equipment; the Bluetooth module of the projection equipment is respectively communicated with the Bluetooth modules at the four top points of the curtain equipment to acquire the distances between the Bluetooth modules at the four top points of the projection equipment and the curtain equipment, and the projection distance L between the Bluetooth modules and the curtain equipment is obtained through calculationdAnd a projection angle α; the length of rectangle curtain equipment is L, and the width is W, and obtains after bluetooth range finding that the distance of projection equipment and upper left summit and upper right summit is D1The distance between the projection equipment and the lower left vertex and the lower right vertex is D2And the distance b between the projection equipment and the upper top edge of the rectangular curtain equipment is as follows: b2＝D1 2-(L/2)2(ii) a The distance a between the projection device and the lower top edge of the rectangular curtain device is as follows: a is2＝D2 2-(L/2)2(ii) a Then, when the distance b between the projection device and the upper top edge of the rectangular curtain device, the distance a between the projection device and the lower top edge of the rectangular curtain device and the width W of the rectangular curtain device are known, the projection distance L of the curtain device can be obtaineddAnd a projection angle α;
D. and the projection equipment automatically focuses and adjusts according to the calculation result.
2. The method for automatically focusing a curtain by a projection device according to claim 1, wherein the step D specifically comprises: the projection equipment projects an image to the curtain equipment by taking the projection distance as a focal length, and automatically adjusts the projection angle direction based on the included angle between the projection equipment and the curtain equipment.
3. The method for automatically focusing a curtain by a projection device according to any one of claims 1 to 2, wherein the projection device is a laser television, a screenless television or a projector.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910695675.5A CN110290367B (en) | 2019-07-30 | 2019-07-30 | Method for automatically focusing curtain of projection equipment |
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| CN201910695675.5A CN110290367B (en) | 2019-07-30 | 2019-07-30 | Method for automatically focusing curtain of projection equipment |
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| CN110851214B (en) * | 2019-09-29 | 2021-01-29 | 深圳市火乐科技发展有限公司 | Projection picture control method and related product |
| CN112333435B (en) * | 2020-10-30 | 2023-02-28 | 歌尔科技有限公司 | Data adjusting method, terminal device and computer readable storage medium |
| CN113038101A (en) * | 2021-03-10 | 2021-06-25 | 江苏金视传奇科技有限公司 | Automatic four-corner trapezoidal correction method and device |
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| US6416186B1 (en) * | 1999-08-23 | 2002-07-09 | Nec Corporation | Projection display unit |
| CN1527126A (en) * | 2003-03-07 | 2004-09-08 | 精工爱普生株式会社 | Image processing system, projector and image processing method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6416186B1 (en) * | 1999-08-23 | 2002-07-09 | Nec Corporation | Projection display unit |
| CN1527126A (en) * | 2003-03-07 | 2004-09-08 | 精工爱普生株式会社 | Image processing system, projector and image processing method |
Non-Patent Citations (1)
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| 一种基于蓝牙4.0和移动终端技术的防丢器系统设计;肖冉等;《黑龙江科技信息》;20161015;论文第195页左栏第20行至196页右栏第15行 * |
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