Automatic unattended-monitoring visual acuity inspection device

Patent metadata

Field	Value
Publication number	US-10105047-B2
Application number	US-201515104672-A
Country	US
Kind code	B2
Filing date	Sep 22, 2015
Priority date	Jun 5, 2015
Publication date	Oct 23, 2018
Grant date	Oct 23, 2018

Abstract

An automatic unattended-monitoring visual acuity inspection device is disclosed. The inspection device includes an inspection panel, an inspector and an isolation wall arranged opposite to the inspection panel. The isolation wall is provided with a wireless signal transmitter configured to transmit a visual acuity indication signal to the wireless signal receiver through a network. The wireless signal receiver is configured to transmit the received visual acuity indication signal to a processor. The processor is configured to process the visual acuity indication signal and transmit a process feedback to the inspection panel. The device may prevent achieving a high level of visual acuity of the person to be inspected by cheating behaviors, thereby highly inspecting a real visual acuity level of the person to be inspected.

First claim

What is claimed is:

1. An automatic unattended-monitoring visual acuity inspection device, comprising an inspection panel, an inspector and an isolation wall arranged opposite to the inspection panel;
wherein the inspection panel comprises a liquid crystal display panel, a lower polarizer and a backlight source successively arranged in a direction from human eyes to the inspection panel; the liquid crystal display panel is configured to display visual display pictures; and the inspection panel further comprises a wireless signal receiver and a processor;
wherein the isolation wall is provided with a wireless signal transmitter configured to transmit a visual acuity indication signal collected from a person to be inspected to the wireless signal receiver through a network;
wherein the wireless signal receiver is configured to transmit the received visual acuity indication signal to the processor, and the processor is configured to process the visual acuity indication signal and transmit a process feedback to the inspection panel;
wherein the inspector comprises a liquid crystal cell, and an outer polarizer and an inner polarizer are provided on an upper surface and a lower surface of the liquid crystal cell, respectively, and a light-transmitting direction of a transmitting axis of the outer polarizer is identical to a light-transmitting direction of a transmitting axis of the lower polarizer of the inspection panel.

2. The automatic unattended-monitoring visual acuity inspection device according to claim 1 , wherein processing the visual acuity indication signal and transmitting the process feedback to the inspection panel by the processor comprise:
comparing the currently received visual acuity indication signal with a pre-stored standard visual acuity inspection signal, and feeding back a comparison result to the inspection panel, and determining whether all the visual display pictures have been applied to inspection, if not, then providing next visual display picture to implement the inspection, if yes, then prompting that inspection operation has been completed, and storing and outputting an inspection result.

3. The automatic unattended-monitoring visual acuity inspection device according to claim 1 , wherein the isolation wall is provided with a touch direction rod, and the visual acuity indication signal of the person to be inspected is transmitted to the wireless signal transmitter by operating the touch direction rod.

4. The automatic unattended-monitoring visual acuity inspection device according to claim 1 , wherein the isolation wall is provided with a sound sensor, and the visual acuity indication signal of the person to be inspected is transmitted to the wireless signal transmitter by collecting a sound signal of the person to be inspected.

5. The automatic unattended-monitoring visual acuity inspection device according to claim 1 , wherein the inspector is integrated on the isolation wall and connected with a lifting rod, and the inspector is driven to perform a lifting motion by the lifting rod under an action of a lifting controller.

6. The automatic unattended-monitoring visual acuity inspection device according to claim 1 , wherein at least one image capturing module is provided at a top of the isolation wall to detect a stature of the person to be inspected, and a calculation formula of the stature of the person to be inspected is as follows:
h 2 =h 1 −( L 2 −d 1 2 ) 1/2

where h 2 is the stature of the person to be inspected, d 1 is a distance between the person to be inspected and the isolation wall, h 1 is a height of the image capturing module on the isolation wall, and L is a distance between the image capturing module and a head of the person to be inspected, which is acquired by the image capturing module.

7. The automatic unattended-monitoring visual acuity inspection device according to claim 6 , wherein a weight sensor is provided on a bottom of the isolation wall to detect a weight of the person to be inspected.

8. The automatic unattended-monitoring visual acuity inspection device according to claim 7 , wherein the calculation formula of the stature h 2 of the person to be inspected is as follows:
h 2 =h 1 −( L 2 −d 1 2 ) 1/2 −h 3

wherein h 3 is an inherent height of the weight sensor.

9. The automatic unattended-monitoring visual acuity inspection device according to claim 1 , wherein the inspector is a pair of shutter glasses provided with a master control power switch and two selectively reversing switches configured to switch a closed or open state of two spectacle lenses, respectively.

10. The automatic unattended-monitoring visual acuity inspection device according to claim 1 , wherein the visual display pictures comprise a standard visual acuity inspection chart or a color-blindness inspection picture.

11. The automatic unattended-monitoring visual acuity inspection device according to claim 2 , wherein the isolation wall is provided with a touch direction rod, and the visual acuity indication signal of the person to be inspected is transmitted to the wireless signal transmitter by operating the touch direction rod.

12. The automatic unattended-monitoring visual acuity inspection device according to claim 2 , wherein the isolation wall is provided with a sound sensor, and the visual acuity indication signal of the person to be inspected is transmitted to the wireless signal transmitter by collecting a sound signal of the person to be inspected.

13. The automatic unattended-monitoring visual acuity inspection device according to claim 2 , wherein the inspector is integrated on the isolation wall and connected with a lifting rod, and the inspector is driven to perform a lifting motion by the lifting rod under an action of a lifting controller.

14. The automatic unattended-monitoring visual acuity inspection device according to claim 3 , wherein the inspector is integrated on the isolation wall and connected with a lifting rod, and the inspector is driven to perform a lifting motion by the lifting rod under an action of a lifting controller.

15. The automatic unattended-monitoring visual acuity inspection device according to claim 4 , wherein the inspector is integrated on the isolation wall and connected with a lifting rod, and the inspector is driven to perform a lifting motion by the lifting rod under an action of a lifting controller.

16. The automatic unattended-monitoring visual acuity inspection device according to claim 11 , wherein the inspector is integrated on the isolation wall and connected with a lifting rod, and the inspector is driven to perform a lifting motion by the lifting rod under an action of a lifting controller.

17. The automatic unattended-monitoring visual acuity inspection device according to claim 12 , wherein the inspector is integrated on the isolation wall and connected with a lifting rod, and the inspector is driven to perform a lifting motion by the lifting rod under an action of a lifting controller.

18. The automatic unattended-monitoring visual acuity inspection device according to claim 2 , wherein at least one image capturing module is provided at a top of the isolation wall to detect a stature of the person to be inspected, and a calculation formula of the stature of the person to be inspected is as follows:
h 2 =h 1 −( L 2 −d 1 2 ) 1/2

where h 2 is the stature of the person to be inspected, d 1 is a distance between the person to be inspected and the isolation wall, h 1 is a height of the image capturing module

Assignees

• Boe Technology Group Co Ltd

Inventors

• Li Wenbo
• Dong Yefei
• Wu Yanbing

Classifications

• A61B3/032 Primary

  Devices for presenting test symbols or characters, e.g. test chart projectors (A61B3/036 takes precedence) · CPC title

• G02F1/133528

  Polarisers · CPC title

• G06T7/70

  Determining position or orientation of objects or cameras (camera calibration G06T7/80) · CPC title

• A61B3/0025

  characterised by electronic signal processing, e.g. eye models · CPC title

• H04N7/183

  for receiving images from a single remote source · CPC title