Display apparatus, door body, and cabinet body

A display device, comprising:

• an information collecting assembly configured to collect environment information;
• a communication module configured to perform wireless-communication linking to an Internet-of-Things device, to transmit the environment information to the Internet-of-Things device, and receive multimedia information sent by the Internet-of-Things device;
• and
• a display module configured to display the multimedia information, and/or display the environment information, wherein:
• the multimedia information comprises at least audio-video advertisement information;
• the environment information comprises flow-rate information, the information collecting assembly comprises a flow-rate-information collecting module, and the flow-rate-information collecting module is disposed at one side of a light-exiting face of the display module;
• and
• the flow-rate-information collecting module is configured to collect human-body image information in an environment located at one side of a light-exiting face of a display screen, and based on the human-body image information collected within a target time duration, determine the flow-rate information;
• the human-body image information comprises depth information, and the flow-rate-information collecting module comprises a time-of-flight camera (TOF) module;
• the TOF module comprises an infrared-laser emitting module, a time sensor, a calculating component and a sensing camera lens;
• the infrared-laser emitting module is configured to emit an infrared laser, and the sensing camera lens is configured to gather the infrared laser that is reflected back;
• the time sensor is configured to, based on the infrared laser gathered by the sensing camera lens, generate the depth information;
• the calculating component is configured to, based on the depth information generated by the time sensor, determine the flow-rate information in a refrigerator exterior environment;
• the TOF module further comprises a structure support, and a first bearing plate and a second bearing plate fixed to two sides of the structure support, respectively;
• the infrared-laser emitting module and the calculating component are fixed to the first bearing plate, and the time sensor is fixed to the second bearing plate;
• and
• the first bearing plate is provided with a camera-lens through hole, the structure support is provided with a support through hole corresponding to the camera-lens through hole, and the sensing camera lens passes through the support through hole and is fixed inside the camera-lens through hole.