A kind of projection angle control method of self adaptation optical projection systemTechnical field
The present invention relates to projection field, particularly relate to a kind of projection angle control method of self adaptation optical projection system.
Background technology
Projecting apparatus, under taking in the policy of national promote domestic demands and the people background constantly promoted, the enforcement of Rural Culture ethnic minority regions has promoted the quick growth of China's Projector Market further.According to statistics, within 2010, China's Projector Market shipment amount scale reaches 1,280,000, compares 2009 and increases by 43.6%.Think, within 2011, China's Projector Market will keep quick growth, and annual shipment amount will reach 1,670,000, year rate of growth to be about projecting apparatus be 30%.The five-year, the compound growth rate of China's Projector Market will reach 17.1%.
China projector's product consumption market mainly concentrates on the large-and-medium size cities such as the more flourishing North China of economy, East China, south China.Education, commercial affairs, government, home entertaining are the four large main consumer groups supporting Chinese projector industry.Make a general survey of China's Projector Market.No matter from the quantity of product, quality or kind aspect, all reach certain maturity, the popularization and application of product makes projector change to mass product from comparatively professional display device in the psychological positioning of user, the marketing scale of industry constantly expands, 2010, China's Projector Market sales volume is 1,100,000, compares 2009 and increases by 37.5%.From this 10 years China's Projector Market developments, China's Projector Market scale increases by 18 times, and its average growth rate per annum is 39.14%, and industry is in high-speed development period.
From the development form in industry future, education is still industry future development pillar field.According to statistics, institute of total kindergarten 12.91 ten thousand, the whole nation in 2010, institute of primary school 39.42 ten thousand, general high school 7.90 ten thousand institute, institute of common medium universities and colleges 3047, institute of higher education school 1778, be equipped with a projector by each classroom to calculate, according to related data display China only education sector market capacity just reach more than 1,100 ten thousand, if calculated according to projection occupation rate, projector can account for about 14%-28% (not comprising market maintenance), and the real sales volume of education market in 2010 is less than 500,000.
Secondly, the development in commercial projection market is also the key strength of left and right projector market development.Although China's commercial affairs projection market, in rapid expansion, is estimated according to relevant survey institute, in future, medium-sized and small enterprises quantity will keep the growth rate of 7%-8%, and within 2012, medium-sized and small enterprises sum will reach 5,000 ten thousand, industry development Bright Prospect.In addition, with regard to domestic at present, wealthy family's quantity of assets more than 1,000,000 can reach more than 200 ten thousand, and some elite, white collar are comparatively large for the demand of the quality of life, amusement equipment, and following household application market has a high potential.
Existing optical projection system generally all needs people manually to adjust projection brightness, very inconvenient.
Patent " self adaptation projecting apparatus " (application number: 201310086955.9) disclose a kind of self adaptation projecting apparatus, comprise image capture module, image processing module and Executive Module, wherein image capture module is taken pictures to the projected picture of projecting apparatus and screen or is taken, and by image processing module to the picture of taking pictures or taking carry out image procossing, analysis, the parameter drawn transfers to Executive Module to make corresponding control to projecting apparatus to order.The positional information of frame out and screen is obtained, by electric machine rotation projecting apparatus by image procossing; Draw monochrome information, the brightness of projection is adjusted automatically; Draw definition, resolution information, automatically focus; Show that screen is concavo-convex, inclined degree information, automatically concavo-convex, process of tilting is done to the image being about to projection.The present invention is applicable to fixed and portable projector.
This projecting apparatus cost is higher, and handling process more complicated, need to compare complicated process to the picture of shooting.
Patent " a kind of method of projecting apparatus frame self-adaptive Geometry rectification " (application number: a kind of method 201310366124.7) disclosing projecting apparatus frame self-adaptive Geometry rectification, comprising: take the projection plane image without projected picture; Target original image to be corrected is projected in projection plane and obtains Current projection picture; The projection plane image of shooting Current projection picture; The point cloud sample data of acquired projections plane; Obtain the homography matrix from camera plane to projection plane; Identify the frame number corresponding to Current projection picture, search the former projected image corresponding to Current projection picture; Obtain the current corresponding relation existed about the two-dimensional position coordinate of matching characteristic between the projection plane image of projected picture and its former projected image, obtain respectively from projecting apparatus plane to camera plane, from projecting apparatus plane to the homography matrix of projection plane; The target original image to be corrected to next frame carries out change of scale process and generates conversion projected image; New Current projection picture is obtained by conversion projector, image projection to projection plane.
This method is also very complicated, and also need to take drop shadow effect, cost is higher simultaneously.
Summary of the invention
Technical problem to be solved by this invention is the defect for relating in background technology, and provide a kind of projection angle control method of self adaptation optical projection system, structure is simple, cheap, automatically can regulate projection angle.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
A projection angle control method for self adaptation optical projection system, described self adaptation optical projection system comprises projecting apparatus and curtain;
Described curtain comprises curtain body, wireless transmitter module, data preparation module and some photosensitive sensors;
Described projecting apparatus comprises control module, angular adjustment module, motor and wireless receiving module;
Described photosensitive sensors is symmetrical and be evenly distributed on curtain body about curtain body central;
Described projection angle control method comprises following steps:
Step 1), described projector, after described curtain body, adopts the photosensitive sensors on curtain body to gather light luminance, and light luminance is passed to data preparation module respectively;
Step 2), described data preparation module sends to wireless receiving module by wireless sending module after the light luminance of each photosensitive sensors received and positional information thereof being arranged;
Step 3), the light luminance of each photosensitive sensors received and positional information thereof are passed to control module by wireless receiving module;
Step 4), control module respectively by the light luminance of each photosensitive sensors and the projection brightness of projecting apparatus poor, pick out difference preset error range in photosensitive sensors;
Step 5), control module judges that whether the photosensitive sensors of difference in the error range preset be symmetrical about curtain body central, if it is symmetrical that the photosensitive sensors of difference in the error range preset is not in relation to curtain body central, then adjusted by the projection angle of Angle ambiguity module controls motor to projecting apparatus, until the photosensitive sensors of difference in the error range preset is symmetrical about curtain body central.
As the further prioritization scheme of projection angle control method of a kind of self adaptation of the present invention optical projection system, described photosensitive sensors is that cross is evenly distributed on described curtain body.
As the further prioritization scheme of projection angle control method of a kind of self adaptation of the present invention optical projection system, described photosensitive sensors is that M shape is evenly distributed on described curtain body.
As the further prioritization scheme of projection angle control method of a kind of self adaptation of the present invention optical projection system, described wireless transmitter module and wireless receiving module are based on Zigbee network wireless connections.
As the further prioritization scheme of projection angle control method of a kind of self adaptation of the present invention optical projection system, the processor of described control module adopts 51 series monolithics.
As the further prioritization scheme of projection angle control method of a kind of self adaptation of the present invention optical projection system, the processor of described control module adopts AT89S52 single-chip microcomputer.
The present invention adopts above technical scheme compared with prior art, has following technique effect:
1. structure is simple, cheap, easy to use;
2. automatically can regulate picture, guarantee that the angle of picture is optimum;
3. can automatic regulating lightness, make the comfortableness of human eye reach maximum.
Accompanying drawing explanation
Fig. 1 is the structural representation of curtain in the present invention;
Fig. 2 is the module diagram of projecting apparatus in the present invention.
In figure, 1-curtain body, 2-photosensitive sensors, 3-data preparation module, 4-wireless transmitter module.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
The invention discloses a kind of projection angle control method of self adaptation optical projection system, described self adaptation optical projection system comprises projecting apparatus and curtain;
As shown in Figure 2, described curtain comprises curtain body, wireless transmitter module, data preparation module and some photosensitive sensors;
As shown in Figure 1, described projecting apparatus comprises control module, angular adjustment module, luminance adjustment module, motor and wireless receiving module;
Described photosensitive sensors is symmetrical and be evenly distributed on curtain body about curtain body central;
Described projection angle control method comprises following steps:
Step 1), described projector, after described curtain body, adopts the photosensitive sensors on curtain body to gather light luminance, and light luminance is passed to data preparation module respectively;
Step 2), described data preparation module sends to wireless receiving module by wireless sending module after the light luminance of each photosensitive sensors received and positional information thereof being arranged;
Step 3), the light luminance of each photosensitive sensors received and positional information thereof are passed to control module by wireless receiving module;
Step 4), control module respectively by the light luminance of each photosensitive sensors and the projection brightness of projecting apparatus poor, pick out difference preset error range in photosensitive sensors;
Step 5), control module judges that whether the photosensitive sensors of difference in the error range preset be symmetrical about curtain body central;
Step 6), if it is symmetrical that the photosensitive sensors of difference in the error range preset is not in relation to curtain body central, then adjusted by the projection angle of Angle ambiguity module controls motor to projecting apparatus, until the photosensitive sensors of difference in the error range preset is symmetrical about curtain body central.
As the further prioritization scheme of projection angle control method of a kind of self adaptation of the present invention optical projection system, described photosensitive sensors is that cross is evenly distributed on described curtain body.
As the further prioritization scheme of projection angle control method of a kind of self adaptation of the present invention optical projection system, described photosensitive sensors is that M shape is evenly distributed on described curtain body.
As the further prioritization scheme of projection angle control method of a kind of self adaptation of the present invention optical projection system, described wireless transmitter module and wireless receiving module are based on Zigbee network wireless connections.
As the further prioritization scheme of projection angle control method of a kind of self adaptation of the present invention optical projection system, the processor of described control module adopts 51 series monolithics.
As the further prioritization scheme of projection angle control method of a kind of self adaptation of the present invention optical projection system, the processor of described control module adopts AT89S52 single-chip microcomputer.
The invention also discloses a kind of control method of projection brightness, comprise following steps:
Step 1), before projecting apparatus is started working, adopts the photosensitive sensors being positioned at curtain body central to gather light luminance, and light luminance is passed to data preparation module;
Step 2), data preparation module is transmitted to wireless receiving module by after data preparation by wireless transmitter module;
Step 3), the information received is passed to control module by wireless receiving module, and control module obtains after the light luminance received is added default luminance difference estimating projection brightness, and estimation projection brightness is passed to luminance adjustment module;
Step 4), after luminance adjustment module receives estimation projection brightness, the maximal projection brightness of estimation projection brightness and projecting apparatus is made comparisons;
Step 5), if estimation projection brightness is more than or equal to the maximal projection brightness of projecting apparatus, the projection brightness of projecting apparatus is adjusted to maximal projection brightness by luminance adjustment module;
Step 6), if estimation projection brightness is less than the maximal projection brightness of projecting apparatus, the projection brightness of projecting apparatus is adjusted to estimation projection brightness by luminance adjustment module.
Above-described embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only the specific embodiment of the present invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.