CN217654732U

CN217654732U - Uniform light field screen optical parameter detection device

Info

Publication number: CN217654732U
Application number: CN202221184358.0U
Authority: CN
Inventors: 郑喜凤; 汪洋; 曹慧; 陈宇; 李倩影
Original assignee: Changchun Cedar Electronics Technology Co Ltd
Current assignee: Changchun Cedar Electronics Technology Co Ltd
Priority date: 2022-05-17
Filing date: 2022-05-17
Publication date: 2022-10-25
Anticipated expiration: 2032-05-17

Abstract

The utility model relates to a device for detecting optical parameters of a screen of a uniform light field, which comprises an illuminometer, a compensating device arranged in front of an LED display screen to be detected and an optical tester; the compensation device comprises a bracket, a lamp mounting structure arranged on the bracket and a plurality of LED lamps distributed on the front edge of the lamp mounting structure; the light emitting surface of the LED lamp faces the LED display screen to be detected, and the brightness of the LED display screen to be detected is adjustable; the lens of the optical tester faces the LED display screen to be tested. The utility model discloses simple and easy, controllable can make the regional environment illuminance of the LED display screen that awaits measuring even, ensures to change within 1 + -10%.

Description

Uniform light field screen optical parameter detection device

Technical Field

The utility model belongs to LED display screen detection area relates to an even light field screen optical parameter detection device.

Background

When detecting the optical main technical performance parameters of the indoor LED display screen, one of strict measurement conditions is as follows: the ambient illumination E varies between (1 +/-10%), and the detection personnel usually carry out detection in a darkroom, and the walls, the shed and the ground of the darkroom are coated with reflectorized paint, namely the ambient illumination is 0lx. In order to meet the test conditions and ensure the accuracy of the LED display screen, a tester usually places a table lamp with adjustable brightness in a darkroom, aligns the normal direction of the LED display screen area to be tested, places an illuminometer probe in the LED display screen area to be tested to measure the ambient illuminance value a (reading the illuminance value a at each point) in the area, and adjusts the adjustable brightness light source until the illuminance value a is within (1 ± 10%), the tester starts to test the optical parameters related to the LED display screen. Therefore, the repeated determination of the environment illumination change meeting the requirement range is complicated, the illumination of the table lamp with adjustable brightness in the space is not uniform, and even in a smaller darkroom, the illumination value of each space in the darkroom is not uniform (the illumination value E is inversely proportional to the square of the testing distance L).

Disclosure of Invention

The to-be-solved technical problem of the utility model is to provide an even light field screen optical parameter detection device.

In order to solve the technical problem, the optical parameter detection device for the uniform light field screen comprises an illuminometer, a compensation device and an optical tester, wherein the compensation device is arranged in front of the LED display screen to be detected; the compensation device comprises a bracket, a lamp mounting structure arranged on the bracket and a plurality of LED lamps distributed on the front edge of the lamp mounting structure; the light emitting surface of the LED lamp faces the LED display screen to be detected, and the brightness of the LED lamp is adjustable; the lens of the optical tester faces the LED display screen to be tested.

The lamp mounting structure can horizontally rotate relative to the bracket.

The optical tester is arranged in front of the compensation device, a hollow hole is formed in the middle of the lamp mounting structure, and an optical axis of the optical tester penetrates through the hollow hole of the lamp mounting structure.

The optical tester is arranged on the lamp mounting structure.

The lamp mounting structure is a polygonal frame structure or a flat plate structure.

The edge of the lamp mounting structure is distributed with a plurality of long strip-shaped LED lamps with equal length, a plurality of round LED lamps, a plurality of square LED lamps or a plurality of single LED lamp beads.

The lamp mounting structure is a circular frame structure or a flat plate structure.

A plurality of round or square LED lamps are distributed on the edge of the lamp mounting structure.

A plurality of single LED lamp beads are uniformly distributed on the edge of the lamp mounting structure.

Has the advantages that:

the utility model discloses constructed a simple and easy, controllable environment device, this device can make the regional environment illuminance of the LED display screen that awaits measuring even, ensures to change within 1 + -10%. The problem of this kind of compensation arrangement of desk lamp that traditional use adjustable luminance lead to waiting to detect the regional environment illuminance inhomogeneous, uncontrollable because of the irradiation area of desk lamp has the limitation to and put numerous desk lamps and need artifical handheld, extravagant manual work etc is solved.

Description of the drawings:

the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic view of the overall structure of embodiment 1 of the present invention.

Fig. 2 is a schematic view of a compensating device of embodiment 1 of the present invention, in which the frame is square.

Fig. 3 is a schematic view of a compensating device of embodiment 1 of the present invention, in which the frame is circular.

Fig. 4 is a schematic diagram of the overall structure of embodiment 2 of the present invention.

Fig. 5 is a schematic view of a square frame compensation device according to embodiment 2 of the present invention.

Fig. 6 is a schematic view of a compensating device of embodiment 2 of the present invention, in which the frame is circular.

Fig. 7 is a schematic diagram of the optical tester of the present invention embedded in the cylindrical supporting structure.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, it being understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; the two elements may be connected directly or indirectly through an intermediate medium, or the two elements may be connected through an intermediate medium or may be in an interactive relationship with each other. The specific meaning of the above terms in the present invention can be specifically understood in specific cases by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," or "beneath" a second feature includes the first feature being directly under or obliquely below the second feature, or simply means that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and simplification of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to be limiting.

Example 1

As shown in fig. 1, the utility model discloses an even light field screen optical parameter detection device includes illuminometer 2, sets up at the compensation arrangement in 1 the place ahead of the LED display screen that awaits measuring, sets up the optical test appearance 4 at the compensation arrangement rear, and optical test appearance 4 is fixed on the tripod, and its camera lens is towards the LED display screen that awaits measuring.

As shown in fig. 2 and 3, the compensation device includes a bracket 31, a lamp mounting structure 32 mounted on the bracket 31, and a plurality of LED lamps 33 distributed on the front side edge of the lamp mounting structure 32, where the lamp mounting structure 32 is connected to the bracket 31 through a rotating shaft and can horizontally rotate relative to the bracket 31; the light emitting surface of the LED lamp 33 faces the LED display screen 1 to be measured, and the brightness of the LED display screen is adjustable.

The support 31 may be a tripod or a rectangular frame.

The lamp mounting structure 32 may be a square, rectangular, circular or other polygonal frame structure having a hollow hole 321 in the middle, or may be a square, rectangular, circular or other polygonal flat plate structure having a hollow hole 321 in the middle.

When the lamp mounting structure 32 is a square, rectangular or other polygonal frame structure or a square, rectangular or other polygonal flat plate structure, four, six, eight or more strip-shaped LED lamps with equal length may be distributed on the edge, a plurality of circular or square LED lamps may be uniformly distributed, and a plurality of single LED lamp beads may be uniformly distributed.

When the lamp mounting structure 32 is circular, a circular ring-shaped LED lamp, or two, three, four or more arc-shaped LED lamps with equal length may be distributed on the edge thereof, or a plurality of circular or square LED lamps may be uniformly distributed, or a plurality of single LED lamp beads may be uniformly distributed.

During detection, each LED lamp is lightened, the illuminometer probe is placed in one area of the LED display screen to be detected, and the lamp mounting structure 32 is rotated to enable the LED lamp 33 on the lamp mounting structure to illuminate the area; adjusting the brightness of the LED lamp to enable the ambient illuminance value of the area to be uniform or the illuminance value Ex (1 +/-10%) to be changed within a range; at this time, the optical parameter of the area can be detected by rotating the lens of the optical tester to align with the center of the area. Similarly, by rotating the lamp mounting structure 32 and the optical tester lens, other areas of the LED display screen to be tested can be detected for relevant optical parameters.

Example 2

As shown in fig. 4, the utility model discloses an even light field screen optical parameter detection device includes illuminometer 2, sets up compensation arrangement and optical test appearance 4 in the 1 the place ahead of the LED display screen that awaits measuring.

As shown in fig. 5 and 6, the compensation device includes a bracket 31, a lamp mounting structure 32 mounted on the bracket 31, and a plurality of LED lamps 33 distributed on the front edge of the lamp mounting structure 32; the lamp mounting structure 32 is connected with the bracket 31 through a rotating shaft and can horizontally rotate relative to the bracket 31; the light emitting surface of the LED lamp 33 faces the LED display screen 1 to be tested, and the brightness of the LED display screen is adjustable.

The support 31 may be a tripod or a rectangular frame structure.

The lamp mounting structure 32 may be a square, rectangular, circular or other polygonal frame structure, or may be a square, rectangular, circular or other polygonal flat plate structure.

As shown in fig. 4 and 7, the optical tester 4 may be embedded in a hollow hole 321 in the compensation device, or a cylindrical support structure 322 may be welded and fixed to the front side surface of the lamp mounting structure 32, and the optical tester 4 is embedded in the cylindrical support structure 322.

When the lamp mounting structure 32 is square, rectangular or other polygonal shape, four, six, eight or more strip-shaped LED lamps may be distributed on the edge, or a plurality of round or square LED lamps may be uniformly distributed, or a plurality of single LED lamp beads may be uniformly distributed.

When the lamp mounting structure 32 is circular, two, three, four or more arc-shaped LED lamps may be distributed on the edge, or a plurality of circular or square LED lamps may be uniformly distributed, or a plurality of single LED lamp beads may be uniformly distributed.

During detection, each LED lamp is lightened, the illuminometer probe is placed in one area of the LED display screen to be detected, and the lamp mounting structure 32 is rotated to enable the LED lamp 33 on the lamp mounting structure to illuminate the area; and adjusting the brightness of the LED lamp to enable the ambient illuminance value of the area to be uniform or the illuminance value Ex (1 +/-10%) to be changed in a range, and detecting the relevant optical parameters of the area by using an optical tester at the moment. Similarly, the lamp mounting structure 32 is rotated, and the detection of the relevant optical parameters can be performed on other areas of the LED display screen to be detected.

Claims

1. A device for detecting optical parameters of a uniform light field screen is characterized by comprising an illuminometer (2), a compensating device and an optical tester (4), wherein the compensating device and the optical tester are arranged in front of an LED display screen (1) to be detected; the compensation device comprises a bracket (31), a lamp mounting structure (32) arranged on the bracket (31) and a plurality of LED lamps (33) distributed on the front side edge of the lamp mounting structure (32); the light emitting surface of the LED lamp (33) faces the LED display screen to be detected, and the brightness of the LED display screen to be detected is adjustable; the lens of the optical tester (4) faces the LED display screen to be tested.

2. The homogeneous light field screen optical parameter sensing device as recited in claim 1, wherein the lamp mounting structure (32) is horizontally rotatable with respect to the bracket (31).

3. The device for detecting the optical parameters of the uniform light field screen according to claim 1, wherein the optical tester (4) is disposed in front of the compensation device, a hollow hole (321) is formed in the middle of the lamp mounting structure (32), and an optical axis of the optical tester (4) passes through the hollow hole (321) of the lamp mounting structure (32).

4. The homogeneous light field screen optical parameter sensing device as recited in claim 1, wherein the optical tester (4) is mounted on the lamp mounting structure (32).

5. The device for detecting the optical parameters of the uniform light field screen according to claim 3 or 4, wherein the lamp mounting structure (32) is a polygonal frame structure or a flat plate structure.

6. The device for detecting the optical parameters of the uniform light field screen according to claim 5, wherein a plurality of long strip-shaped LED lamps with equal length, a plurality of round LED lamps or a plurality of square LED lamps are distributed at the edge of the lamp mounting structure (32).

7. The homogeneous light field screen optical parameter detection device according to claim 3 or 4, wherein the lamp mounting structure (32) is a circular frame structure.

8. The uniform light field screen optical parameter detection device of claim 7, wherein a plurality of circular LED lamps or square LED lamps are distributed on the edge of the lamp mounting structure (32).

9. The device for detecting the optical parameters of the uniform light field screen according to claim 7, wherein a plurality of single LED lamp beads are uniformly distributed on the edge of the lamp mounting structure (32).