CN214632110U

CN214632110U - Light source suitable for vision screening instrument

Info

Publication number: CN214632110U
Application number: CN202023038631.2U
Authority: CN
Inventors: 陈文明
Original assignee: Beijing Leiwu Forest Intelligent Technology Co ltd
Current assignee: Jiangsu Gaowei Yuanyu Intelligent Medical Technology Co ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2021-11-09
Anticipated expiration: 2030-12-17

Abstract

The embodiment of the utility model provides a light source suitable for eyesight screening instrument, including the lamp plate, the lamp plate center sets up the diaphragm, set up six LED arrays with the diaphragm center with first preset spacing distance, the contained angle is 60 degrees between the adjacent LED array, every LED array all includes three LED group, set up second preset spacing distance between the adjacent LED group, every LED group includes two LEDs of series connection, set up third preset spacing distance between two LEDs, wherein, first preset spacing distance, second preset spacing distance and third preset spacing distance carry out corresponding setting according to the predetermined algorithm of supporting image recognition module; each LED group is connected with the controller, the controller is connected with the memory, and the memory is used for storing different light emitting modes. The utility model discloses the people's eye that can effectively improve the calculation and acquire bends the accuracy of photometric quantity.

Description

Light source suitable for vision screening instrument

Technical Field

The utility model relates to a light source, concretely relates to light source suitable for vision screening appearance.

Background

For preliminary determination or screening of the refractive power of the human eye, a visual screening machine is generally used. The vision screening instrument is internally provided with a light source to acquire an image of human eyes to be detected through the light source, and the image of the human eyes to be detected is identified and analyzed through the image identification module, so that the diopter of the human eyes is acquired. It can be seen that the light source is a key component in the vision screening apparatus.

In practice, it is found that since the image recognition module needs to acquire a plurality of eye images to be detected shot at corresponding angles and corresponding distances, the diopter of the eye can be accurately calculated and acquired according to a predetermined algorithm, however, the light source in the prior art cannot meet the above requirements, so that the degree of matching between the light source and the image recognition module is not high, and further, the calculated and acquired eye diopter value is not accurate.

Disclosure of Invention

In view of this, the embodiment of the present invention provides a light source suitable for a vision screening apparatus to solve the above technical problem.

In order to achieve the technical purpose, an embodiment of the present invention provides a light source suitable for a vision screening instrument, which is improved in that the light source comprises a lamp panel, wherein a diaphragm is arranged at the center of the lamp panel, six LED arrays are arranged at the center of the diaphragm at a first preset spacing distance, an included angle between the adjacent LED arrays is 60 degrees, each LED array comprises three LED groups, a second preset spacing distance is arranged between the adjacent LED groups, each LED group comprises two LEDs connected in series, and a third preset spacing distance is arranged between the two LEDs, wherein the first preset spacing distance, the second preset spacing distance and the third preset spacing distance are correspondingly arranged according to a preset algorithm of a matched image recognition module;

each LED group is connected with a controller, the controller is connected with a memory, and the memory is used for storing different light emitting modes.

The utility model discloses owing to take above technical scheme, compare with prior art, it has following advantage:

1. the utility model discloses a set up six LED arrays at diaphragm outside circumference interval, adjacent LED array interval is 60 degrees, and the controller can control each LED group as required and give out light, consequently, can acquire the people's eye image that awaits measuring at 360 degrees full angles as required.

2. The utility model discloses owing to set up LED's luminous distance position according to image recognition module's predetermined algorithm, promptly: the first preset spacing distance, the second preset spacing distance and the third preset spacing distance are used, so that the light source is tightly matched with the image recognition module, and the accuracy of the human eye diopter value obtained through calculation is further improved.

The utility model discloses convenient operation, it is with low costs, can wide application in various visual acuity screening appearance.

Drawings

Fig. 1 is a schematic structural diagram of one embodiment of the light source suitable for the vision screening apparatus of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.

As shown in fig. 1, the embodiment of the utility model provides a light source suitable for eyesight screening instrument, including lamp plate 1, lamp plate 1 center sets up diaphragm 2, set up six LED arrays 3 with first preset spacing distance D1 with diaphragm 2 center, the contained angle is 60 degrees between the adjacent LED array 3, every LED array 3 all includes three LED group 4, set up second preset spacing distance D2 between the adjacent LED group 4, every LED group 4 includes two LED5 of series connection, set up third preset spacing distance D3 between two LED5, wherein, first preset spacing distance D1, second preset spacing distance D2 and third preset spacing distance D3 correspond the setting according to supporting image recognition module's predetermined algorithm;

each LED group 4 is connected with the controller, the controller is connected with the memory, the memory is used for storing different light emitting modes, so that the controller can control the corresponding LED group 4 to emit light according to different light emitting modes, and the different light emitting modes of the LED groups 4 are matched with the image recognition module, so that typical characteristic images with human eye diopter information at different angles and different distances, namely a plurality of human eye images to be detected can be generated.

Obviously, through setting up six LED arrays 3 in diaphragm 2 outside circumference, the contained angle is 60 degrees between the adjacent LED array 3, and the controller can control each LED group 4 as required and give out light, consequently, can acquire the human eye image that awaits measuring at 360 degrees full angles as required.

Meanwhile, since the light emitting distance position of the LED is set according to a predetermined algorithm of the image recognition module, that is: the first preset spacing distance D1, the second preset spacing distance D2 and the third preset spacing distance D3 enable the light source and the image recognition module to be tightly matched, and accuracy of calculating the obtained human eye diopter value is further improved.

In one embodiment, the diaphragm 2 is arranged as a regular hexagon with a distance of 16.45 mm across the regular hexagon and a distance of 18.98 mm towards the opposite vertex. .

In one embodiment, the different lighting patterns stored by the memory may be: and controlling any one LED group 4 to emit light, or controlling three LED groups 4 in the same LED array 3 to emit light simultaneously.

In one embodiment, the first preset separation distance D1 is the shortest distance from the center of the diaphragm to the straight line where the lamp wick of the nearest LED group in the same LED array is located, and specifically is: 12 mm.

In one embodiment, the second preset separation distance D2 is the shortest distance between straight lines of the lamp centers of adjacent LED groups in the same LED array, and specifically is: 7 mm.

In one embodiment, the third preset separation distance D3 is the shortest distance between two LED boundaries, specifically: 1.9 mm.

In one embodiment, each LED group 4 may emit at an angle of 30 degrees.

In one embodiment, the controller is connected with the brightness detection device, and the brightness detection device is used for acquiring an illumination brightness value of the current external environment and sending the illumination brightness value to the controller in real time, so that the controller adjusts the exposure time of the matched image sensor according to the illumination brightness value, the definition of the image of the human eye to be detected is further improved, and the accuracy of the acquired human eye diopter is further improved.

Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. The light source suitable for the vision screening instrument is characterized by comprising a lamp panel, wherein the center of the lamp panel is provided with a diaphragm, six LED arrays are arranged at the center of the diaphragm at a first preset interval distance, included angles between every two adjacent LED arrays are 60 degrees, each LED array comprises three LED groups, a second preset interval distance is arranged between every two adjacent LED groups, each LED group comprises two LEDs connected in series, and a third preset interval distance is arranged between every two LEDs, wherein the first preset interval distance, the second preset interval distance and the third preset interval distance are correspondingly arranged according to a preset algorithm of a matched image recognition module;

2. The light source of claim 1, wherein the first predetermined distance is a shortest distance from a center of the diaphragm to a line where the lamp core of the LED group closest to the same LED array is located.

3. The light source of claim 2, wherein the first predetermined separation distance is 12 mm.

4. The light source of claim 1, wherein the second predetermined distance is a shortest distance between adjacent wicks of the LED sets in the same LED array.

5. A light source as claimed in claim 4, wherein the second predetermined separation distance is 7 mm.

6. The light source of claim 1, wherein the third predetermined separation distance is the shortest distance between the two LED boundaries.

7. The light source of claim 6, wherein the third predetermined separation distance is 1.9 mm.

8. The light source of claim 1, wherein the aperture is configured as a regular hexagon.

9. The light source of claim 8, wherein the regular hexagon has a distance between opposite sides of 16.45 mm and an opposite vertex of 18.98 mm.

10. The light source of claim 1, wherein the controller is connected to a brightness detection device, and the brightness detection device is configured to obtain an illumination brightness value of a current external environment and send the illumination brightness value to the controller in real time, so that the controller adjusts an exposure time of the image sensor according to the illumination brightness value.