CN211826872U

CN211826872U - Automatic ultra-short focus projector structure of focusing

Info

Publication number: CN211826872U
Application number: CN202020966702.6U
Authority: CN
Inventors: 杨昌昱; 唐晓东
Original assignee: Everest Technology Ltd
Current assignee: Everest Technology Ltd
Priority date: 2020-06-01
Filing date: 2020-06-01
Publication date: 2020-10-30
Anticipated expiration: 2030-06-01

Abstract

The utility model discloses an automatic focusing ultra-short focus projector structure, which comprises an automatic focusing structure, a light source heat dissipation structure, a shell, a LCD screen and a backlight source; the automatic focusing structure and the LCD screen are arranged in a focusing area of the shell, and the light source heat dissipation structure and the backlight source are arranged in a heat dissipation air duct area of the shell; the light source heat dissipation structure performs half/full air duct heat dissipation on the backlight source according to the temperature of the backlight source; the automatic focusing structure adjusts an output picture according to the angle of the projector towards the projection screen, so that the picture projected to the projection screen by the projector is rectangular; receiving ranging data of the laser ranging module through the MCU module; searching a database according to the ranging data, analyzing and calculating an adjustment value of an image corner, sending the adjustment value to an image processing unit to re-correct the image, and outputting a proper picture; half/full air duct heat dissipation is respectively carried out to the backlight according to the backlight temperature, can increase the life-span and the result of use of projecting apparatus when effectively cooling down.

Description

Automatic ultra-short focus projector structure of focusing

Technical Field

The utility model relates to an ultrashort burnt projection technique especially relates to an automatic ultrashort burnt projecting apparatus structure of focusing.

Background

The ultra-short-focus projector has the greatest advantage that a large picture can be projected at a short distance (dozens of centimeters or several centimeters), has the advantages of space saving, convenience in installation and the like compared with a conventional projector which can only be installed in the middle of a roof, and can be placed near a wall. The ultra-short-focus projector has the disadvantages of high process requirements, high product price compared with the common projector, and easy linear distortion of the projected picture.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: in order to overcome the deficiencies in the prior art, the utility model provides an automatic ultra-short burnt projecting apparatus structure of focusing can carry out automatic correction to the picture of distortion.

The technical scheme is as follows: in order to achieve the above object, the utility model discloses an auto-focus ultra-short-focus projector structure, which comprises an auto-focus structure, a light source heat dissipation structure, a shell, a LCD screen and a backlight source; the automatic focusing structure and the LCD screen are arranged in a focusing area of the shell, and the light source heat dissipation structure and the backlight source are arranged in a heat dissipation air duct area of the shell; the light source heat dissipation structure performs half/full air duct heat dissipation on the backlight source according to the temperature of the backlight source; the automatic focusing structure adjusts an output picture according to the angle of the projector towards the projection screen, so that the picture projected to the projection screen by the projector is rectangular.

Furthermore, the automatic focusing structure comprises a laser ranging module, an MCU module, a motor module and a focusing lens; the laser ranging module measures the distance between the projection screen and the projector, the signal output end of the laser ranging module is connected to the signal receiving end of the MCU module, and the signal output end of the MCU module is connected to the motor module and the LCD screen in a control mode.

Furthermore, the laser ranging module comprises a first laser ranging module, a second laser ranging module and a third laser ranging module; the first laser ranging module is arranged on one side of the top of the projector, and the second laser ranging module is arranged on the other side of the top of the projector; when the projector is over against the projection screen, the distance from the first laser ranging module to the projection screen is equal to the distance from the second laser ranging module to the projection screen; the third laser ranging module is arranged on the mirror image center line of the first laser ranging module and the second laser ranging module, and the distance from the third laser ranging module to the projection screen is greater than the distance from the first laser ranging module and the second laser ranging module to the projection screen.

Further, the light source heat dissipation structure comprises an air duct switching mechanism, a transparent PVC plate, an air inlet fan and an air exhaust fan; the transparent PVC plate separates the focusing area from the heat dissipation air duct area, the side walls of the two ends of the shell in the length direction of the transparent PVC plate are oppositely provided with a first ventilation opening and a second ventilation opening, the air inlet fan is arranged at the first ventilation opening, and the exhaust fan is arranged at the second ventilation opening;

the back surface of the light emitting surface of the backlight source is attached to the air duct switching mechanism, and the light emitting surface of the backlight source faces the transparent PVC plate; the air duct switching mechanism and the backlight source are arranged between the air inlet fan and the exhaust fan; when the air duct switching mechanism is in a full air duct state, air passes through a first air duct and a second air duct on two sides of the backlight source and the air duct switching mechanism; when the air duct switching mechanism is in a half air duct state, air passes through the first air duct on one side of the backlight source.

Further, the air duct switching mechanism comprises a heat conducting plate, an elastic air bag, an air duct baffle and a push rod structure; one surface of the heat conducting plate is attached to the back surface of the light emitting surface, the other surface of the heat conducting plate is connected with the elastic air bag, and the elastic air bag can expand when heated; the air duct baffle is hinged to one end, facing the air inlet fan, of the heat conduction plate, and a rebounding structure is arranged at the hinged position and has the tendency of buckling the air duct baffle with the heat conduction plate; when the elastic air bag is expanded when meeting heat, the air duct baffle and the heat conducting plate can be mutually pushed away from each other from the buckling state until the air duct baffle rotates to the maximum opening and closing angle.

Furthermore, a rotating vertical shaft is arranged below the air inlet fan and is rotatably connected to the bottom surface of the shell; the air duct baffle is movably connected to the rotating vertical shaft through a push rod structure; when the air duct baffle rotates by taking the hinged end as a shaft, the push rod structure can be pushed so as to drive the rotating vertical shaft to rotate; when the air duct baffle rotates to the maximum opening and closing angle by taking the hinged end as an axis, the air duct baffle is perpendicular to the heat conducting plate, and the air duct baffle blocks the second air duct.

Has the advantages that: the utility model discloses an automatic focusing ultra-short focus projector structure which can automatically correct distorted pictures; including but not limited to the following technical effects:

1) receiving ranging data of the laser ranging module through the MCU module; searching a database according to the ranging data, analyzing and calculating an adjustment value of an image corner, sending the adjustment value to an image processing unit to re-correct the image, and outputting a proper picture;

2) half/full air duct heat dissipation is respectively carried out to the backlight according to the backlight temperature, can increase the life-span and the result of use of projecting apparatus when effectively cooling down.

Drawings

FIG. 1 is a structural diagram of the present invention;

FIG. 2 is a schematic view of the automatic focusing structure of the present invention;

FIG. 3 is a schematic view of the heat dissipation structure of the light source of the present invention;

fig. 4 is a schematic view of the air duct switching mechanism of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in figures 1-4: an automatic focusing ultra-short focus projector structure comprises an automatic focusing structure 1, a light source heat dissipation structure 2, a shell 3, an LCD screen 4 and a backlight source 5; the automatic focusing structure 1 and the LCD screen 4 are arranged in a focusing area 31 of the shell 3, and the light source heat dissipation structure 2 and the backlight source 5 are arranged in a heat dissipation air channel area 32 of the shell 3; the light source heat dissipation structure 2 performs half/full air duct heat dissipation on the backlight source 5 according to the temperature of the backlight source; the automatic focusing structure 1 adjusts an output picture according to the angle of the projector towards the projection screen, so that the picture projected to the projection screen by the projector is rectangular; when the projector is not exactly opposite to the projection screen, the image can be deviated, the automatic focusing structure 1 can adjust the deviated image and then output the image again, and the deviated image is corrected into a rectangular image; because the main heat source of the projector is the backlight 5, the heat dissipation air duct area 32 is arranged to form an air duct with an independent space in the housing 3, and is specially used for dissipating heat of the backlight 5.

The automatic focusing structure 1 comprises a laser ranging module 11, an MCU module 12, a motor module 13 and a focusing lens 14; the laser ranging module 11 measures the distance between the projection screen and the projector, the signal output end of the laser ranging module 11 is connected to the signal receiving end of the MCU module 12, and the signal output end of the MCU module 12 is connected to the motor module 13 and the LCD screen 4 in a control mode; the four corners of the projection screen are respectively a corner a, a corner b, a corner c and a corner d; the laser ranging module 11 ranges the distance between the projection screen and the projector, and the MCU module 12 receives ranging data of the laser ranging module 11; the MCU module 12 processes the data and then adjusts the focal length of the focusing lens 14 through the motor module 13; the MCU module 12 searches a database according to the ranging data, analyzes and calculates the adjustment value of the image corner, sends the adjustment value to the image processing unit to re-correct the image, and then projects and displays the image on the projection screen.

The laser ranging module 11 comprises a first laser ranging module 111, a second laser ranging module 112 and a third laser ranging module 113; the first laser ranging module 111 is arranged on one side of the top of the projector, and the second laser ranging module 112 is arranged on the other side of the top of the projector; when the projector is over against the projection screen, the distance from the first laser ranging module 111 to the projection screen is equal to the distance from the second laser ranging module 112 to the projection screen; the third laser ranging module 113 is arranged on the mirror image center line of the first laser ranging module 111 and the second laser ranging module 112, and the distance from the third laser ranging module 113 to the projection screen is greater than the distance from the first laser ranging module 111 and the second laser ranging module 112 to the projection screen;

the first laser ranging module 111 is located on the left side of the projector and monitors the distance between the left side of the projector and the projection screen, the second laser ranging module 112 is located on the right side of the projector and monitors the distance between the right side of the projector and the projection screen, and the third laser ranging module 113 monitors the offset distance between the front side and the rear side of the projector and the projection screen; when the distance between the left side of the projector and the projection screen monitored by the first laser ranging module 111 is greater than the distance between the right side of the projector and the projection screen monitored by the second laser ranging module 112, namely L1 is greater than L2, a horizontal trapezoid phenomenon with a wide left side and a narrow right side appears on a projection picture; at this time, the MCU module 12 obtains the values of L1 and L2 by querying the database to obtain the number Na of pixels that the corner a needs to shrink downwards and the number Nb of pixels that the corner b needs to shrink upwards, and sends Na and Nb to the image processing unit module, and the image processing unit module processes the image and then outputs the corrected image again;

when the side of the projector close to the projection screen is tilted higher than the side far from the projection screen, the third laser ranging module 113 monitors that the offset distance between the front side and the rear side of the projector and the projection screen is L3'; when the projector is normally placed, the third laser ranging module 113 monitors that the distance between the front side and the rear side of the projector and the projection screen is L3; obtaining an offset difference DeltaL 3 from L3' -L3; the MCU module obtains Δ L3, and meanwhile, queries the database to obtain the number Na and Nc of the pixels that the corner a and the corner c need to shrink, and the MCU module 12 sends Na and Nc to the image processing unit to output the picture again after processing the image.

The light source heat dissipation structure 2 comprises an air duct switching mechanism 21, a transparent PVC plate 23, an air inlet fan 24 and an air exhaust fan 25; the transparent PVC plate 23 separates the focusing area 31 from the heat dissipation air channel area 32, the side walls of the two ends of the shell 3 in the length direction of the transparent PVC plate 23 are oppositely provided with a first ventilation opening 33 and a second ventilation opening 34, the air inlet fan 24 is arranged at the first ventilation opening 33, and the air exhaust fan 25 is arranged at the second ventilation opening 34; the transparent PVC plate 23 is made of transparent material, so that the backlight 5 is not influenced to provide a light source for the LCD screen 4; the air intake fan 24 sucks air from the first ventilation opening 33 into the heat dissipation air channel area 32, and the air exhaust fan 25 exhausts air from the second ventilation opening 34 out of the heat dissipation air channel area 32, so that air circulation is formed to dissipate heat of the backlight 5 in the heat dissipation air channel area 32.

The back surface of the light-emitting surface 51 of the backlight 5 is attached to the air duct switching mechanism 21, and the light-emitting surface 51 of the backlight 5 faces the transparent PVC plate 23; the air duct switching mechanism 21 and the backlight source 5 are arranged between the air inlet fan 24 and the exhaust fan 25; when the air duct switching mechanism 21 is in a full air duct state, air passes through the first air duct 6 and the second air duct 7 on both sides of the air duct switching mechanism 21 and the backlight 5; when the air duct switching mechanism 21 is in a half air duct state, air passes through the first air duct 6 on the backlight 5 side; when the air duct switching mechanism 21 is in a full air duct state, quantitative air respectively passes through the first air duct 6 and the second air duct 7, so that the air pressure is low, the air flow rate is low, the dust deposition speed of the air with low flow rate on the backlight source 5 is reduced, the service life of the backlight source 5 is prolonged, and the influence of air flow on the light source quality is reduced; when the temperature of the backlight source 5 is too high, the state is switched to a half air duct state, the air flow rate is increased by increasing the air pressure, and because the main heating part of the backlight source 5 is positioned on the light-emitting surface 51, the air in the first air duct 6 flowing through the light-emitting surface 51 is accelerated to circulate, so that the effect of quickly cooling can be achieved.

The air duct switching mechanism 21 comprises a heat conduction plate 211, an elastic air bag 212, an air duct baffle 213 and a push rod structure 214; one surface of the heat conducting plate 211 is attached to the back surface of the light emitting surface 51, the other surface of the heat conducting plate is connected with the elastic air bag 212, and the elastic air bag 212 can expand when heated; the air duct baffle 213 is hinged to one end of the heat conducting plate 211 facing the air inlet fan 24, and a rebounding structure 215 is arranged at the hinged position, wherein the rebounding structure 215 has a tendency of buckling the air duct baffle 213 with the heat conducting plate 211; when the elastic airbag 212 expands with heat, the air duct baffle 213 and the heat conducting plate 211 can be pushed away from each other from the buckling state until the air duct baffle 213 rotates to the maximum opening and closing angle; when the temperature of the backlight source 5 is low and the air duct switching mechanism 21 is in a full air duct state, the air in the elastic air bag 212 cannot expand, and the air duct baffle 213 is buckled with the heat conducting plate 211; work as 5 temperatures of backlight constantly rise, heat-conducting plate 211 is through contacting heat conduction with backlight 5 and transferring heat to elastic air bag 212, the inside gas temperature of elastic air bag 212 constantly rises, and the volume begins to expand and separates the wind channel baffle 213 and the heat-conducting plate 211 of lock, wind channel baffle 213 rotate to the biggest angle of opening and shutting perpendicular to heat-conducting plate 211 after with, the 3 lateral walls of one side laminating casing of wind channel baffle 213 will the shutoff of second wind channel 7 for the air only follows first wind channel 6 circulates, reaches rapid cooling's effect.

A rotating vertical shaft 241 is arranged below the air inlet fan 24, and the rotating vertical shaft 241 is rotatably connected to the bottom surface of the shell 3; the air duct baffle 213 is movably connected to the rotating vertical shaft 241 through a push rod structure 214; when the air duct baffle 213 rotates with the hinged end as an axis, the push rod structure 214 can be pushed to drive the rotating vertical shaft 241 to rotate; when the air duct baffle 213 rotates to the maximum opening and closing angle with the hinged end as the axis, the air duct baffle 213 is perpendicular to the heat conducting plate 211 and blocks the second air duct 7; the air duct baffle 213 drives the rotating vertical shaft 241 to rotate by pushing the push rod structure 214, and the rotating vertical shaft 241 rotates the connected air supply fan 24 together, so as to move the blowing direction of the air supply fan 24 to one side of the first air duct 6, so as to supply air to the first air duct 6 better and independently.

The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. An automatic ultra-short focus projector structure that focuses which characterized in that: the device comprises an automatic focusing structure (1), a light source heat dissipation structure (2), a shell (3), an LCD screen (4) and a backlight source (5); the automatic focusing structure (1) and the LCD screen (4) are arranged in a focusing area (31) of the shell (3), and the light source heat dissipation structure (2) and the backlight source (5) are arranged in a heat dissipation air channel area (32) of the shell (3); the light source heat dissipation structure (2) performs half/full air duct heat dissipation on the backlight source (5) according to the temperature of the backlight source; the automatic focusing structure (1) adjusts an output picture according to the angle of the projector towards the projection screen, so that the picture projected to the projection screen by the projector is rectangular.

2. The structure of an auto-focus ultra-short focus projector as claimed in claim 1, wherein: the automatic focusing structure (1) comprises a laser ranging module (11), an MCU module (12), a motor module (13) and a focusing lens (14); the distance between the projection screen and the projector is measured by the laser ranging module (11), the signal output end of the laser ranging module (11) is connected with the signal receiving end of the MCU module (12), and the signal output end of the MCU module (12) is in control connection with the motor module (13) and the LCD screen (4).

3. The structure of an auto-focus ultra-short focus projector according to claim 2, wherein: the laser ranging module (11) comprises a first laser ranging module (111), a second laser ranging module (112) and a third laser ranging module (113); the first laser ranging module (111) is arranged on one side of the top of the projector, and the second laser ranging module (112) is arranged on the other side of the top of the projector; when the projector is over against the projection screen, the distance from the first laser ranging module (111) to the projection screen is equal to the distance from the second laser ranging module (112) to the projection screen; the third laser ranging module (113) is arranged on the mirror image center line of the first laser ranging module (111) and the second laser ranging module (112), and the distance from the third laser ranging module (113) to the projection screen is larger than the distance from the first laser ranging module (111) and the second laser ranging module (112) to the projection screen.

4. The structure of an auto-focus ultra-short focus projector as claimed in claim 1, wherein: the light source heat dissipation structure (2) comprises an air duct switching mechanism (21), a transparent PVC plate (23), an air inlet fan (24) and an exhaust fan (25); the transparent PVC plate (23) separates the focusing area (31) from the heat dissipation air channel area (32), the side walls of the two ends of the shell (3) in the length direction of the transparent PVC plate (23) are oppositely provided with a first ventilation opening (33) and a second ventilation opening (34), the air inlet fan (24) is arranged at the first ventilation opening (33), and the exhaust fan (25) is arranged at the second ventilation opening (34);

the back of the luminous surface (51) of the backlight source (5) is attached to the air duct switching mechanism (21) and the luminous surface (51) of the backlight source (5) faces the transparent PVC plate (23); the air duct switching mechanism (21) and the backlight source (5) are arranged between the air inlet fan (24) and the exhaust fan (25); when the air duct switching mechanism (21) is in a full air duct state, air passes through a first air duct (6) and a second air duct (7) on two sides of the air duct switching mechanism (21) and the backlight source (5); when the air duct switching mechanism (21) is in a half air duct state, air passes through the first air duct (6) on the backlight source (5) side.

5. The structure of an auto-focus ultra-short focus projector as claimed in claim 4, wherein: the air duct switching mechanism (21) comprises a heat conduction plate (211), an elastic air bag (212), an air duct baffle (213) and a push rod structure (214); one surface of the heat conducting plate (211) is attached to the back surface of the light emitting surface (51), the other surface of the heat conducting plate is connected with the elastic air bag (212), and the elastic air bag (212) can expand when heated; the air duct baffle (213) is hinged to one end, facing the air inlet fan (24), of the heat-conducting plate (211), a rebounding structure (215) is arranged at the hinged position, and the rebounding structure (215) has the tendency that the air duct baffle (213) is buckled with the heat-conducting plate (211); when the elastic air bag (212) is expanded when heated, the air duct baffle (213) and the heat conducting plate (211) can be mutually pushed away from the buckling state until the air duct baffle (213) rotates to the maximum opening and closing angle.

6. The structure of an auto-focus ultra-short focus projector as claimed in claim 5, wherein: a rotating vertical shaft (241) is arranged below the air inlet fan (24), and the rotating vertical shaft (241) is rotatably connected to the bottom surface of the shell (3); the air channel baffle plate (213) is movably connected to the rotating vertical shaft (241) through a push rod structure (214); when the air duct baffle (213) rotates by taking the hinged end as a shaft, the push rod structure (214) can be pushed so as to drive the rotating vertical shaft (241) to rotate; when the air duct baffle (213) rotates to the maximum opening and closing angle by taking the hinged end as an axis, the air duct baffle is perpendicular to the heat conducting plate (211), and the air duct baffle (213) blocks the second air duct (7).