Screen optical detection device

Abstract

The utility model provides a screen optical detection device, which is used for detecting a to-be-detected screen which is fixed on a bearing frame and is opposite to a projection light source, and comprises a rocker arm, the near end of the rocker arm is close to the to-be-detected screen and is positioned in front of the to-be-detected screen, the near end is rotatably arranged to form an arc-shaped path of the far end of the rocker arm, and the far end of the rocker arm is positioned in front of the projection light source. A rotating coverage surface where the rocker arm is vertical to the to-be-detected screen is formed; and the base is connected to the far end, and a brightness meter is connected to the base. According to the utility model, the stability of the detection equipment is improved when the detection angle and position of the detection equipment are adjusted, so that the accuracy of detection data is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of projection screen testing, and particularly relates to an optical detection device for a screen. Background Art

[0002] As an important part of film and audio-visual education products, the screen plays a crucial role in the film and television culture industry, and the quality of the screen is related to the quality of people's spiritual life. The light projected by the projector onto the screen forms reflected light after reflection. When the reflected light is too bright, it will be dazzling, and when it is too dark, it will cause fatigue. Therefore, the standard test for the screen quality has begun to be taken seriously by people. At present, the main parameters for testing the projection effect of the screen include brightness parameters, effective scattering angle, color temperature difference, screen resolution, etc.

[0003] In the related art, when testing the screen, generally, testers use devices such as a luminance meter to operate in a specific optical environment. During the testing process, it is necessary to manually adjust the position and testing angle of the detection device multiple times. However, due to the long testing time, the testing method of manually adjusting the testing angle and position has poor stability, resulting in a decrease in the accuracy of the detection data. Summary of the Utility Model

[0004] In view of this, the utility model aims to propose an optical detection device for a screen to improve the stability of the detection device when adjusting the detection angle and position of the detection device, so as to improve the accuracy of the detection data.

[0005] To achieve the above object, the technical solution of the utility model is realized as follows:

[0006] An optical detection device for a screen is used to detect a screen to be tested fixed on a carrier and facing a projection light source. The detection device includes:

[0007] A swing arm, the proximal end of the swing arm is close to the screen to be tested and in front of the screen to be tested, and the proximal end is rotatably arranged to form an arc path of the distal end of the swing arm, and form a rotation coverage surface where the swing arm is perpendicular to the screen to be tested;

[0008] A base, connected to the distal end, and a luminance meter is connected to the base.

[0009] Further, a lifting platform is arranged on the base, and the luminance meter is fixed on the lifting platform to adjust the height of the luminance meter.

[0010] Further, a carrier table, a guide rail is arranged on the table board of the carrier table; the base is loosely fitted and buckled on the guide rail and slides along the guide rail.

[0011] Further, the proximal end is connected with a driving component to form a rotation with the proximal end as a base point; the driving component includes:

[0012] A connecting seat, connected to the proximal end;

[0013] A driving member, connected to the framework of the bearing platform and driving the connecting seat to rotate.

[0014] Furthermore, a speed reducer is provided between the connecting seat and the driving member, and the speed reducer is connected to the driving member and the connecting seat.

[0015] Furthermore, the driving member is a motor, the base of the motor is connected to the framework of the bearing platform, and the output shaft of the motor is connected to the speed reducer.

[0016] Furthermore, the bearing frame includes:

[0017] A main frame, with the bottom end supported on the carrier and the top end extending above the bearing platform;

[0018] A spreading frame, fixedly connected to the top end of the main frame, so that the screen to be tested is spread out facing the projection light source.

[0019] Furthermore, lifting columns are hung on the display side of the spreading frame. There are at least two lifting columns, which are respectively arranged at both ends of the spreading frame and hooked on the spreading frame.

[0020] Furthermore, hooks distributed along the length direction of the lifting column are cut on the side of the lifting column close to the spreading frame.

[0021] Compared with the prior art, the present utility model has the following advantages:

[0022] In the screen optical detection device of the present utility model, by setting the rocker arm, the proximal end of the rocker arm is close to the screen to be tested and rotates with the end point of the proximal end as the rotation point, so as to realize the arc path of the distal end of the rocker arm. The distance between the distal end and the screen to be tested is the same and is within the same rotation coverage area. Furthermore, the stability of the detection device when adjusting the detection angle and position of the detection device is improved, so as to improve the accuracy of the detection data.

[0023] By setting the lifting platform, the detection position of the luminance meter on the screen to be tested is adjusted. The detection center point is determined by fine-tuning the luminance meter, and it is convenient to keep the height of the luminance meter unchanged after determining the center point.

[0024] By setting the bearing platform and the guide rail, the limit of the movement path of the base is realized, and the stability of the base during movement is improved.

[0025] By setting the driving assembly, it is convenient to adjust the speed of the base during movement through the driving member and the connecting seat, and make the base move at a consistent speed, so as to improve the stability of the luminance meter during movement during detection, and further improve the stability of the detection data.

[0026] By setting the driving member as a motor and arranging a speed reducer between the driving member and the connecting seat, it is convenient to adjust the rotation direction and rotation speed of the output shaft of the motor, so as to adjust the position of the luminance meter, improve the detection stability and the repeatability of the detection position. Furthermore, it is convenient to review the detection data.

[0027] By arranging the spreading frame, it is convenient to detect the screen to be measured in a flattened state, so as to reduce the possibility of wrinkles on the screen to be measured and improve the accuracy of the detection data.

[0028] After connecting the screen to be measured with the lifting column and hooking the lifting column on the spreading frame, it is convenient to fix the screen to be measured with different sizes and make it centered relative to the spreading frame. A hook is formed on the back side of the lifting column, so as to facilitate adjusting the relative position between the lifting column and the spreading frame, and further facilitate adjusting the relative positions of the screen to be measured, the projection light source and the luminance meter, so as to improve the stability of the data and meet the diversity of the detection data at different positions. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings forming a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0030] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0031] Figure 2 is a schematic diagram of some parts showing the drive assembly of an embodiment of the present utility model;

[0032] Figure 3 is a schematic diagram of some parts showing the carrier of an embodiment of the present utility model;

[0033] Figure 4 is a partial part drawing showing the lifting column of an embodiment of the present utility model.

[0034] Description of the reference numerals: 1. Rocker arm;

[0035] 101. Proximal end; 102. Distal end;

[0036] 2. Base;

[0037] 3. Carrier;

[0038] 301. Main frame; 302. Spreading frame; 303. Lifting column; 3031. Hook;

[0039] 4. Projection light source;

[0040] 5. Luminometer;

[0041] 6. Lift table;

[0042] 7. Carrying platform;

[0043] 8. Guide rail;

[0044] 9. Driving assembly; 901. Connecting seat; 902. Driving part; 903. Reducer. Detailed implementation mode

[0045] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0046] In the description of the present utility model, it should be noted that if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present utility model. In addition, if terms such as "first", "second", etc. appear, they are also only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0047] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installation", "connection", "connection", "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood in combination with specific situations.

[0048] The present utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0049] This embodiment relates to a screen optical detection device to improve the stability of the detection device when adjusting the detection angle and position of the detection device, so as to improve the accuracy of the detection data.

[0050] In terms of the overall structure, the screen optical detection device is used to detect the screen to be measured fixed on the carrier 3 facing the projection light source 4. The detection device includes: a swing arm 1, the proximal end 101 of the swing arm 1 is close to the screen to be measured and is in front of the screen to be measured. The proximal end 101 is rotatably arranged to form an arc path of the distal end 102 of the swing arm 1, and form a rotation coverage surface perpendicular to the screen to be measured by the swing arm 1; a base 2, connected to the distal end 102, and a luminometer 5 is connected to the base 2.

[0051] By setting the rocker arm 1, the proximal end 101 of the rocker arm 1 is brought close to the screen to be measured and rotated with the end point of the proximal end 101 as the rotation point, so as to realize the arc path of the distal end 102 of the rocker arm 1. The distance between the distal end 102 and the screen to be measured is the same, thereby realizing the measurement of the brightness reflected by the screen to be measured at different angles. This can improve the stability of the detection device when adjusting the detection angle and position, so as to improve the accuracy of the detection data.

[0052] Based on the above overall introduction, in this embodiment, the screen optical detection device described is as Figures 1 to 4 shown. The screen optical detection device further includes a carrier table 7. A guide rail 8 is provided on the table board of the carrier table 7. The base 2 is loosely fitted and buckled on the guide rail 8 and slides along the guide rail 8. The carrier table 7 has a certain height and the table top of the carrier table 7 is a plane, and the table top of the carrier table 7 is perpendicular to the screen to be measured; and the table top of the carrier table 7 is generally semi-circular to meet the fixed installation of the guide rail 8 while reducing the floor area and material use. On this basis, for the convenience of the detection personnel to detect, the projection light source 4 is placed on a bracket so that the light emitted by the projection light source 4 is perpendicularly irradiated on the screen to be measured. The rocker arm 1 is set to be cylindrical to facilitate connection with the base 2 and reduce the possibility of the rocker arm 1 rubbing against the carrier table 7.

[0053] In order to facilitate the adjustment of the relative position between the luminance meter 5 and the screen to be measured and realize the fine adjustment of the height of the luminance meter 5, a lifting platform 6 is provided on the base 2, and the luminance meter 5 is fixed on the lifting platform 6 to adjust the height of the luminance meter 5; the detection center point is determined by the fine adjustment of the luminance meter 5, and it is convenient to keep the height of the luminance meter 5 unchanged after the center point is measured. The lifting platform 6 is a scissor lifting platform 6, and the size of the table top of the lifting platform 6 is based on the ability to place the luminance meter 5.

[0054] In order to facilitate the control of the rotation of the rocker arm 1, the proximal end 101 is connected with a driving assembly 9 to form a rotation with the proximal end 101 as the base point; the driving assembly 9 includes a connecting seat 901 and a driving member 902, and the connecting seat 901 is connected with the proximal end 101; the driving member 902 is connected with the skeleton of the carrier table 7 and drives the connecting seat 901 to rotate. The driving member 902 is based on the ability to drive the connecting seat 901 to rotate. In this embodiment, the driving member 902 is a motor. A speed reducer 903 is provided between the connecting seat 901 and the driving member 902, and the speed reducer 903 connects the driving member 902 and the connecting seat 901. The base of the motor is connected with the skeleton of the carrier table 7, and the output shaft of the motor is connected with the speed reducer 903.

[0055] By setting the driving component 9, it is convenient to adjust the speed of the base 2 when moving through the driving member 902 and the connecting seat 901, and make the base 2 move at a consistent speed, so as to improve the stability of the luminance meter 5 when moving during detection, and further improve the stability of the detection data. By setting the driving member 902 as a motor and arranging a speed reducer 903 between the driving member 902 and the connecting seat 901, it is convenient to adjust the rotation direction and rotation speed of the output shaft of the motor, so as to stably adjust the position of the luminance meter 5, improve the detection stability and the repeatability of the detection position. Furthermore, it is convenient to review the detection data.

[0056] Based on the purpose of making the screen to be measured face the projection light source 4, in order to facilitate the unfolding of the screen to be measured, the carrier 3 includes a main frame 301 and a spreading frame 302. The bottom end of the main frame 301 is supported on the carrier, and the carrier can be the ground or other planes, as long as the stable setting of the main frame 301 can be achieved. The top end of the main frame 301 extends above the carrying platform 7; the spreading frame 302 is rectangular and annular, and the spreading frame 302 is fixedly connected to the top end of the main frame 301, so that the screen to be measured faces the projection light source 4 after being spread.

[0057] In order to make the carrier 3 suitable for screens to be measured of different sizes, lifting columns 303 are hung on the display side of the spreading frame 302. At least two lifting columns 303 are provided. In this embodiment, two lifting columns 303 are provided. The lifting columns 303 are respectively arranged at both ends of the spreading frame 302 and are hooked on the spreading frame 302. In order to facilitate the adjustment of the relative position between the lifting column 303 and the spreading frame 302, a hook 3031 distributed along the length direction of the lifting column 303 is cut on the side of the lifting column 303 close to the spreading frame 302.

[0058] By setting the spreading frame 302, it is convenient to detect the screen to be measured in a flattened state, so as to reduce the possibility of wrinkles on the screen to be measured and improve the accuracy of the detection data. After connecting the screen to be measured with the lifting column 303 and hooking the lifting column 303 on the spreading frame 302, it is convenient to fix screens to be measured of different sizes and make them centered relative to the spreading frame 302. A hook 3031 is formed on the back side of the lifting column 303, so as to facilitate the adjustment of the relative position between the lifting column 303 and the spreading frame 302, and further facilitate the relative positions of the screen to be measured, the projection light source 4 and the luminance meter 5, so as to improve the data stability and meet the diversity of detection data at different positions.

[0059] When the screen optical detection device of this embodiment is in use, the screen to be tested is fixed on the lifting column 303, and the distance between the two lifting columns 303 is adjusted to flatten the screen to be tested. After the screen to be tested is flattened, the lifting column 303 is hooked on the spreading frame 302 through the hook 3031; at this time, the projection light source 4 is adjusted so that the projection light source 4 faces the screen to be tested, and the luminance meter 5 is turned on. The lifting table 6 is finely adjusted to determine the detection center point, and the driving member 902 is started. The driving member 902 drives the swing arm 1 to rotate, so as to stably and repeatedly detect the screen to be tested. The detection of different positions of the screen to be tested can also be realized by adjusting the height of the lifting frame 303. The stability of the detection device is improved when adjusting the detection angle and position of the detection device, so as to improve the accuracy of the detection data.

[0060] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A screen optical detection device, used for detecting a screen to be detected which is fixed on a support frame (3) and faces a projection light source (4), characterized in that: The detection device comprises: A rocker arm (1), wherein the proximal end (101) of the rocker arm (1) is close to and located in front of the screen to be tested, and the proximal end (101) is rotatably arranged to form an arc path of the distal end (102) of the rocker arm (1), and to form a rotational coverage surface of the rocker arm (1) perpendicular to the screen to be tested; A base (2) is connected to the distal end (102), and a brightness meter (5) is connected to the base (2).

2. The screen optical detection device according to claim 1, characterized in that: A lifting platform (6) is provided on the base (2), and the brightness meter (5) is fixed on the lifting platform (6) to adjust the height of the brightness meter (5).

3. The screen optical detection device according to claim 1, characterized in that: Also includes: A bearing platform (7), wherein a guide rail (8) is arranged on a tabletop of the bearing platform (7); the base (2) is loosely fitted and buckled on the guide rail (8) and slides along the guide rail (8).

4. The screen optical detection device according to claim 3, characterized in that: The proximal end (101) is connected to a driving assembly (9) to form a rotation with the proximal end (101) as a base point; the driving assembly (9) comprises: A connecting seat (901) connected to the proximal end (101); The driving member (902) is connected to the frame of the supporting platform (7) and drives the connecting seat (901) to rotate.

5. The screen optical detection device according to claim 4, characterized in that: A reducer (903) is provided between the connecting seat (901) and the driving member (902), and the reducer (903) connects the driving member (902) and the connecting seat (901).

6. The screen optical detection device according to claim 5, characterized in that: The driving member (902) is a motor, the base of the motor is connected to the frame of the supporting platform (7), and the output shaft of the motor is connected to the reducer (903).

7. The screen optical detection device according to claim 3, characterized in that: The carrier frame (3) comprises: A main frame (301), the bottom end of which is supported on the carrier, and the top end of which extends above the supporting platform (7); The spreading frame (302) is fixedly connected to the top of the main frame (301) so that the screen to be tested faces the projection light source (4) after spreading.

8. The screen optical detection device according to claim 7, characterized in that: A lifting column (303) is hung on the display side of the spreading frame (302), and at least two lifting columns (303) are provided. The lifting columns (303) are respectively arranged at two ends of the spreading frame (302) and are hooked on the spreading frame (302).

9. The screen optical detection device according to claim 8, characterized in that: A side of the lifting column (303) close to the spreading frame (302) is cut to form hooks (3031) distributed along the length direction of the lifting column (303).

Images