CN2750599Y - Monocular head worn wireless audio/video monitor - Google Patents

Abstract

A monocular head-mounted wireless audio and video monitor is composed of a one-way or two-way wireless audio and video storage transmitter and a monocular head-mounted wireless audio and video receiving display. The monocular head-mounted wireless audio and video receiving display includes a monocular virtual display, a wireless receiving antenna, a mobile rechargeable power supply and a head-mounted positioning device. The shell of the monocular virtual display is a slightly inwardly curved rectangular block; the front end of the head-mounted positioning device is movably connected to one side of the monocular virtual display shell; the wireless receiving antenna is fixed on the monocular virtual display. on the housing of the display; the mobile rechargeable power supply is mounted on the side of the headgear positioning device. The head-mounted positioning device has a shape approximate to the outline of the human brain, has a tightening mechanism, and can balance the weight of the monocular virtual display. The monitor only uses one eye to watch, and the other eye can observe other scenes at the same time, so the device of the utility model can be widely used in the fields of entertainment, monitoring and monitoring, and the like.

Description

Monocular head-mounted wireless audio and video monitor

technical field

The utility model relates to the fields of micro-display, short-distance wireless connection technology of audio and video signals, audio and video compression and storage technology and the like. Specifically, a monocular head-mounted wireless audio and video surveillance system is composed of a single-purpose micro-display device and a wireless audio and video sending and receiving circuit.

Background technique

Existing portable audio and video surveillance products adopt small-sized (2.5-inch to 5-inch) flat-panel displays combined with relevant wireless video transmission technologies. However, such a monitoring system has a small viewing screen and low display resolution, and needs to be carried by the user, making it inconvenient to do other things. In addition, the currently commonly used small-sized (2.5 inch-5 inch) flat panel displays require frequent charging or battery replacement because of the relatively large power consumption of the backlight source.

The Institute of Information and Opto-Mechatronics, Shenzhen Tsinghua Research Institute has been tracking the technological development of the micro-display industry, continuing to study near-eye display (NTE) technology and related products, and has established extensive contacts with micro-display chip manufacturers around the world. Manufacturers provide logistics and technical guidance. From the perspective of portable monitoring, they proposed the design idea of using micro-displays to realize a monocular head-mounted wireless audio and video monitoring system.

There are many definitions of microdisplay, and different manufacturers have different definitions. But in general, a microdisplay is a display with a diagonal of less than 8cm, some smaller than a penny. What we care about here is a display device whose size is the size of a coin and whose single pixel size is about 10×10um. The use of microdisplays can greatly reduce the weight, volume and power consumption of display devices. In recent years, microdisplays have become the core components of modern head-mounted displays, and the development of microdisplay technology has directly promoted the development of head-mounted video display products. At present, the commercialized micro-display devices mainly have three technical realization principles: (a) liquid crystal liquid crystal technology; (b) MEMS (micro-electro-mechanical-systems) micro-electro-mechanical systems; (c) electroluminescent electroluminescence. These three display technologies are combined with CMOS production technology in the development process, which is critical to the success of micro display device products. The development of the three display technologies have developed LCD, DLP, OLED and other types of micro-display devices. At present, LCD microdisplays are the most cost-competitive products, and are more suitable for low-cost civilian consumption development, such as the utility model monocular head-mounted wireless audio and video monitor. There are two types of LCD microdisplays: transmissive LCD technology and LCOS technology.

The imaging principle of the transmissive LCD technology is similar to that of a slide projector. The LCD panel is irradiated by a high-brightness light source. After the image penetrates the panel, it is focused and enlarged by the projection lens group. Generally, there will be three LCD panels, which are responsible for the RGB three-color display. Developing, the three-color image is superimposed to obtain a color image. LCOS technology is to sandwich a layer of liquid crystal between a glass cover and a highly reflective mirror surface, and the reflective mirror surface is a silicon wafer pixel, and these layers form a micro-display. Because LCOS is based on silicon chips, it is possible to integrate drive circuits, signal processors, video decoders, microprocessors, and memory on silicon substrates during the manufacturing process. At present, the main manufacturers of micro-display devices include companies such as MicroDisplay, Kopin and Three-Five System. There are no domestic manufacturers.

The microdisplay needs to be equipped with a special virtual optical amplification system. Using the principle of virtual image observation, a virtual screen of more than 40 inches can be formed at a distance of 2 meters from the human eye. The image resolution can be selected to be at least 640×480.

Due to the high integration of micro-displays and the use of white light diode backlight technology, the entire display system has low power consumption and long life.

The development of head-mounted monitors has common characteristics with direct display technology (such as flat panel display), but also has unique difficulties in micro-display technology. Microdisplay technology is an interdisciplinary comprehensive technology, which involves a variety of disciplines listed below: semiconductor microelectronics, video display technology and automatic control in the field of electronics; colorimetry, optical design and optical processing in the field of optics; Tool and mold technology in the mechanical field; also includes ergonomics, new material research and other fields.

An important part of the portable monitoring device is the wireless connection. Regarding the wireless connection in the monitoring field, not only the interconnection between two points should be considered, but also the possible network interconnection.

At present, there are many standards in the wireless field, and new ones are constantly being introduced. Often, there may be multiple competing standards even for one technology. Wi-Fi, Bluetooth, Ultra Wideband (UWB), and HomeRF are all trying to gain a piece of the wireless market.

IEEE (Institute of Electrical and Electronics Engineers) proposed the first wireless local area network standard in 1997. The establishment of the IEEE 802.11 wireless local area network standard is a milestone in the development of wireless network technology. The work of testing the compatibility of IEEE 802.11 wireless products is undertaken by the Wi-Fi Alliance Wireless Ethernet Association WECA composed of manufacturers. The constant emergence of new Wi-Fi standards is helping Wi-Fi wireless networking technology to maintain strong growth, and 802.11 has become the mainstream standard of wireless local area network (WLAN). The network data transmission speed using the slightly older 802.11b standard is as fast as 10MB per second, with an average of 4MB per second, while the new 802.11g standard enables the network speed to reach 54MB per second, with an average of 22MB per second. Both standards use the 2.4GHz radio band. The other IEEE802.11a uses the 5GHz frequency band, and the communication speed is 20M-50Mbps. The latest 802.11j uses the spectrum range from 4.9 to 5GHz. In the United States, 4.9GHz is gradually being used in public safety and home safety communication networks.

Bluetooth (Blue Tooth) is the name of a low-cost, short-range wireless connection technology standard. It is a global wireless technology standard jointly initiated by five world-class computer and communication companies: Ericsson, IBM, Intel, Nokia and Toshiba. Bluetooth technology uses low-energy radio communication technology to transmit voice, data and video. The International Bluetooth Special Interest Group (Blue Tooth SIG) has adopted a strategy of transferring this patented technology to the industry around the world free of charge.

The HomeRF (Home Radio Frequency) industry standard is proposed by the "Home Radio Frequency Working Group" composed of several famous companies (such as Intel, Compaq, etc.) as the core. It is suitable for wireless communication within the home area and can occupy 2.4G frequency part. At present, HomeRF has different specifications according to market segments. Home RF Lite Firefly has a transmission rate of 128Kbps and a transmission distance of 10 meters. Another specification, HomeRF Multimedia, has a transmission rate of 25Mbps and a transmission distance of 25 meters.

Ultra-Wideband (UWB) technology is a high-speed wireless connection technology, generally with a maximum effective distance of 30 feet (9 meters), which can replace USB cables for communication between home entertainment devices. Currently, the Institute of Electrical and Electrical Engineers (IEEE) is in charge of formulating standards for UWB ultra-wideband technology. Currently, IEEE has locked on the "Orthogonal Frequency Division Multiplexing" of the Orthogonal Frequency Division Multiplexing Alliance (MBOA) and the "Direct Sequence" technology of the Motorola Group.

The current competitive development of multiple standards has segmented the market and reduced costs. A good wireless connection mode is provided for the utility model. For example, the use of the 2.4G frequency band does not need to be applied for by the committee, and it is free and open. At the same time, 802.11b, Bluetooth, and HomeRF all have standards in this frequency band and can be adopted.

Contents of the invention

The purpose of this utility model is to propose a monocular head-mounted wireless audio and video monitor system with small size and low power consumption in response to the needs of the wireless audio and video monitoring market; Using only one eye for monitoring, you can see at least 38 inches of virtual image monitoring screen at 2 meters in front of your eyes, and the resolution of the screen can reach more than 640*480. The wireless transmitter of this system can not only transmit audio and video signals wirelessly, but also store audio and video signals in its own large-capacity memory in a certain compression coding format.

For realizing the purpose of the invention, the utility model has taken following technical scheme:

A monocular head-mounted wireless audio and video monitor includes a wireless audio and video storage transmitter with one-way or two-way wireless connection and a monocular head-mounted wireless audio and video receiving display.

The wireless audio and video storage transmitter includes an external audio and video input interface circuit, a wireless transmission encoding and driving circuit, an audio and video transmitting antenna, and a multimedia encoding storage processing module; the signal input end of the external audio and video input interface circuit is connected to an external audio and video input, and its signal output terminal is respectively connected to a wireless transmission coding and driving circuit and a multimedia coding storage processing module, and the wireless transmission coding and driving circuit is connected to an audio and video transmitting antenna.

The multimedia encoding and storage processing module of the wireless audio and video storage transmitter includes a processor chip and a memory, which can realize compression, encoding and storage of audio and video input signals. The information recorded in the memory can be automatically deleted and recycled.

The monocular head-mounted wireless audio and video receiving display includes: a wireless receiving antenna and a monocular virtual display, a mobile rechargeable power supply providing power for the monocular virtual display, and a head-mounted positioning device for fixing the monocular virtual display.

The monocular virtual display includes a sequentially connected wireless decoding and receiving circuit, a miniature display driving circuit, and a miniature eye) to see the monitoring picture.

The shell of the monocular virtual display is a slightly inwardly curved rectangular block, so that external interference light will not enter the monocular virtual display in large quantities; The side is movably connected, and has a position locking device; the wireless receiving antenna is fixed on the shell of the monocular virtual display; the mobile rechargeable power supply is installed on the side of the head-mounted positioning device, and the power supply is removable and can be used in a dedicated Charge on the charger.

The headgear positioning device has a shape similar to the outer contour of the human brain and has a tightening mechanism. The headgear positioning device is balanced with the weight on both sides of the monocular virtual display with the human ear as the fulcrum to ensure that the headgear positioning device is comfortable to wear .

The external audio and video input is an audio and video signal of a TV or DVD, or a monitoring camera on a remote control toy, a video monitor in the security field, or a monitoring output of professional camera equipment. The wireless interconnection between the wireless audio and video storage transmitter and the monocular head-mounted wireless audio and video receiving display can adopt wireless connection technologies such as Wi-Fi 802.11, Bluetooth, HomeRF and ultra-wideband (UWB), and can also be used for free The self-designed transmission protocol is used to realize the wireless transmission of audio and video in the radio frequency band.

The utility model monocular head-mounted wireless audio and video monitor has the following beneficial effects: easy to use, reliable and practical; can transmit audio and video information within the range of 0 meters to 100 meters; The monitoring system has low power consumption, so it is small in size and long in life.

Description of drawings

Fig. 1 is the composition schematic diagram of monocular head-mounted audio-video monitor of the present utility model;

Fig. 2 is a schematic diagram of the composition of the monocular head-mounted wireless audio and video storage transmitter 1;

FIG. 3 is a schematic diagram of the composition of a monocular head-mounted wireless audio and video receiving display 2;

FIG. 4 is a schematic diagram of the composition of the monocular virtual display 21 of the head-mounted wireless audio and video receiving display 2 .

Detailed ways

Embodiment of the utility model is described below in conjunction with accompanying drawing.

Fig. 1 is a schematic diagram of the composition of the monocular head-mounted wireless audio and video monitor of the present invention. Through the free and open 2.4GHz radio frequency band, the monocular head-mounted wireless audio and video monitor of the present invention is composed of a wireless audio and video storage transmitter 1 and a monocular head-mounted wireless audio and video receiving display 2. The wireless connection between the two can be one-way or two-way.

The wireless audio and video storage transmitter 1 includes an external audio and video input interface circuit 11 that can accept external audio and video input signals, a wireless transmission encoding and driving circuit 12 that is unidirectionally connected to the external audio and video input interface circuit 11, and a multimedia encoding and storage system. The processing module 14 and the audio and video transmitting antenna 13 directly connected to the wireless transmitting encoding and driving circuit are shown in FIG. 2 .

The input of the external audio and video input interface circuit 11 can be consumer appliances such as televisions (including digital televisions), DVDs, etc., or surveillance cameras on remote control toys, video monitors in the security field, or professional camera equipment. monitoring output and so on. The external audio and video input interface circuit is suitable for various forms of audio and video signal input: the sound is analog stereo or mono, the video can be analog (such as analog video CVBS, S-Video, Analog RGB, etc.), or digital (such as digital video CCIR656, Digital RGB, etc.). The external audio and video input interface circuit is mainly composed of a video format conversion chip, such as the PW113 chip of Pixworks Company. Of course, the same type of chips from other companies can also be used.

The video connection from the external audio and video input interface circuit 11 to the multimedia encoding storage processing module 14 may be in CCIR656 format, and the audio is in an analog mode. External audio and video input interface circuit 11 sends the audio frequency and video signal of wireless transmission encoding and driving circuit 12 and can be all the form of simulation (video adopts the mode of CVBS), also can be the form of digital (as video is CCIR656 format, audio frequency passes through sampling, quantization processing).

The multimedia encoding storage processing module 14 can realize the compressed storage of audio and video signals, and it includes a processor chip and a memory, and the memory is generally a flash memory (Flash) or a micro hard disk. The information recorded in the memory can be automatically deleted and recycled. The processor chip is generally a digital camera processing chip with MPEG4 encoding function, such as Sunplus's SPV536 (in addition, a higher-cost multimedia digital signal processor can also achieve similar functions, such as TI's DM270).

The monocular head-mounted wireless audio and video receiving display 2 includes a monocular virtual display 21 using white light diode backlight technology, which is wirelessly connected with the transmitting antenna 13 of the wireless audio and video storage transmitter 1, and provides a monocular virtual display 21. The wireless receiving antenna 22 for inputting information, the mobile rechargeable power supply 23 providing power for the monocular virtual display 21, and the head-mounted positioning device 24 for fixing the monocular virtual display 21, as shown in FIG. 3 .

The monocular virtual display 21 includes: a wireless decoding receiving circuit 211 connected to the wireless receiving antenna 22, a micro-display driving circuit 212, a micro-display 213 and a virtual optical amplification system 215 connected to the wireless decoding receiving circuit unidirectionally in sequence , the LED backlight system 216 that provides the light source for the microdisplay 213 and the audio player part ( FIG. 4 ) connected with the audio signal output by the wireless decoding receiving circuit 211 . Using the principle of near-eye virtual image observation, the wearer of the monocular virtual display can see a virtual surveillance screen of more than 40 inches at a distance of 2 meters in front of his eyes.

The headgear positioning device 24 is a specially designed positioning device for the monocular virtual display 21. The utility model adopts the design principle of ergonomics to design its housing, as shown in FIG. 3 . The shell of the monocular virtual display 21 is a slightly inwardly curved rectangular block, which can prevent external strong light from entering the monocular virtual display and affecting the display; connected, and have a position locking device; the wireless receiving antenna 22 is fixed on the shell of the monocular virtual display 21; Charge on a dedicated charger. The head-mounted positioning device 24 also has a tightening hoop mechanism, which has a shape approximate to the outer contour of the human brain, so as to ensure that the head-mounted positioning device is comfortable to wear, and the head-mounted positioning device and the monocular virtual display have the weight on both sides of the fulcrum with the human ear as the fulcrum. phase balance.

The wireless interconnection between the wireless audio and video storage transmitter and the monocular head-mounted wireless audio and video receiving display takes place in a free and open frequency band not applied to the Radio Commission, such as 2.4GHz. Wireless connection technologies such as Wi-Fi 802.11, Bluetooth, HomeRF, and ultra-wideband (UWB) can be used, and self-designed transmission protocols can also be used to realize wireless transmission of audio and video.

People use this monocular head-mounted wireless audio and video monitor, which can reliably transmit and receive audio and video information within the range of 0 to 100 meters. The monocular head-mounted wireless audio and video receiving display 2 is worn on the head, and only one eye is used to watch, and the external scenery can be observed at the same time, and the user can do other things with his hands. The device of the utility model provides a reliable and practical wireless audio and video monitor for the wireless audio and video monitoring market.

Claims (8)

1. a monocular wear-type wireless audio and video monitor comprises that wireless audio and video stored transmit device (1) and monocular wear-type wireless audio and video unidirectional or that double-direction radio connects receive display (2).

2. wireless audio and video monitor according to claim 1 is characterized in that: described wireless audio and video stored transmit device (1) comprises outside audio frequency and video input interface circuit (11), wireless transmission coding and drive circuit (12), audio frequency and video transmitting antenna (13) and multimedia coding stores processor module (14); The signal input part of described outside audio frequency and video input interface circuit (11) connects external audio frequency and video input, its signal output part connects wireless transmission coding and drive circuit (12) and multimedia coding stores processor module (14) respectively, and described wireless transmission coding is connected audio frequency and video transmitting antenna (13) with drive circuit (12).

3. wireless audio and video monitor according to claim 1 is characterized in that: described monocular wear-type wireless audio and video receives display (2) and comprising: wireless receiving antenna (22) and monocular virtual monitor (21), be that monocular virtual monitor (21) provides the mobile rechargeable type power supply (23) of power supply and is used for fixing a pendant positioner (24) of monocular virtual monitor (21).

4. wireless audio and video monitor according to claim 1, it is characterized in that: described monocular virtual monitor (21) comprises the wireless decoding receiving circuit (211) that is linked in sequence, miniature display driver circuit (212), miniscope (213) and virtual optics amplification system (215) and the audio player (214) that is connected with the signal output part of described wireless decoding receiving circuit (211) and the LED-backlit system (216) of light source is provided for miniscope (213), described wireless decoding receiving circuit (211) is connected with wireless receiving antenna (22), and the mode that described virtual optics amplification system (215) is observed with nearly order offers the virtual image that human eye amplifies.

5. wireless audio and video monitor according to claim 3 is characterized in that: the shell of described monocular virtual monitor (21) is the block body of slightly aduncate rectangle, makes extraneous stray light can not enter the monocular virtual monitor in a large number; One side of the leading section of described pendant positioner (24) and monocular virtual monitor (21) shell flexibly connects, and position locking device is arranged; Described wireless receiving antenna (22) is fixed on the shell of monocular virtual monitor (21); Described disconnectable mobile rechargeable type power supply (23) is installed in a side of pendant positioner (24).

6. wireless audio and video monitor according to claim 3 is characterized in that: described pendant positioner (24) has the shape of approximate human brain outline and has lock ring mechanism.

7. wireless audio and video monitor according to claim 3 is characterized in that: described pendant positioner (24) is fulcrum both sides balanced with monocular virtual monitor (21) with people's ear.

8. wireless audio and video monitor according to claim 2, it is characterized in that: described external audio frequency and video input is the audio-video signal of television set or DVD, or the video-frequency monitor or the supervision of the professional apparatus for making a video recording output of the monitoring camera on the remote-control toy, safety-security area.

Images