CN101814253A - Display device and display system thereof - Google Patents

Abstract

A display device comprises a radio frequency identification volume label unit, a display unit, a processing unit and a power supply unit. The radio frequency identification tag unit receives a radio signal following a radio communication standard of a radio frequency identification system and outputs identification information. The processing unit is electrically connected with the radio frequency identification volume label unit and the display unit and is used for receiving the identification information and outputting the identification information to the display unit for displaying. The power supply unit supplies power required by the operation of the processing unit and the display unit. The display device provides power supply required by information updating through the power supply unit, so that the information can be updated through a longer communication distance, and power is saved. A display system composed of the display device and the read/write device is also disclosed.

Description

Display device and display system thereof

technical field

The invention relates to a display device and a display system thereof, in particular to a display device with a wireless communication module and relatively power-saving and a display system thereof.

Background technique

Due to their small size, thin flat displays are widely used in exhibition spaces to provide useful information. Since most of the displays providing information are scattered and arranged in various specific locations, it is impractical to update the displayed information of the displays using a wired connection. In contrast, using a wireless communication connection to update display information on the display is a more user-acceptable solution.

There are several types of wireless communication technologies: infrared (Infrared, IR) transmission, wireless local area network, bluetooth, Zigbee, radio frequency identification system (Radio Frequency Identification, RFID) and so on. However, the directivity of infrared (Infrared, IR) transmission is poor, and it is easy to be shielded to affect the communication quality, and it can only communicate in one direction. Wireless communication methods such as wireless local area network, bluetooth, and Zigbee are relatively power-consuming and costly. Although the RFID system can communicate bidirectionally, when writing data into the electronically erasable programmable read-only memory (EEPROM) built in the tag (Tag), due to the need for better communication quality In order to provide a stable and sufficient power supply, the communication distance is only about 1 meter, which is still not suitable for practical applications. In addition, the write times of the built-in EEPROM of the volume label is about 100,000 times, which is also insufficient in applications where the display information is updated frequently.

To sum up, how to integrate the wireless communication technology and the display, so that the display information can be updated wirelessly and save power is a goal that needs to be worked hard at present.

Contents of the invention

In view of the above problems, one of the objects of the present invention is to provide a display device and its display system, which uses the tag in the radio frequency identification system as the wireless communication module, and uses the power supply unit to provide the power required for updating information. Therefore, the display device and its display system of the present invention can update information with a longer communication distance, and save more power than other wireless communication technologies.

To achieve the above object, a display device according to an embodiment of the present invention includes: a radio frequency identification tag unit, a display unit, a processing unit, and a power supply unit. The radio frequency identification tag unit follows the radio communication standard of the radio frequency identification system to receive wireless signals and output identification information. The display unit is used for displaying identification information. The processing unit is electrically connected with the radio frequency identification tag unit and the display unit for receiving identification information and outputting it to the display unit for display. The power supply unit supplies the power required for the operation of the processing unit and the display unit.

In order to achieve the above object, a display system according to another embodiment of the present invention includes: a read/write device and a display device. The read/write device transmits and/or receives wireless signals following the wireless communication standard of the wireless frequency identification system. The display device includes: a radio frequency identification tag unit, a display unit, a processing unit and a power supply unit. The radio frequency identification tag unit follows the radio communication standard of the radio frequency identification system to receive wireless signals and output identification information. The display unit is used for displaying identification information. The processing unit is electrically connected with the radio frequency identification tag unit and the display unit for receiving identification information and outputting it to the display unit for display. The power supply unit supplies the power required for the operation of the processing unit and the display unit.

The purpose, technical content, characteristics and effects of the present invention will be more easily understood through specific embodiments and detailed descriptions in conjunction with the accompanying drawings.

Description of drawings

FIG. 1 is a block diagram showing a display device and a display system thereof according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a display device according to another embodiment of the present invention.

Explanation of main component symbols

1. 1'display device

11 Radio frequency identification tag unit

12 processing units

13 display unit

14 Power supply unit

15 storage units

2 read/write device

I _ID identification information

V _{RF RF} power supply

WS wireless signal

Detailed ways

Referring to FIG. 1 , a display system according to an embodiment of the present invention includes a display device 1 and a read/write device 2 . The read/write device 2 follows the radio frequency identification (Radio Frequency Identification, RFID) wireless communication standard to transmit a wireless signal WS, which may include identification information I _ID . The display device 1 includes: a radio frequency identification tag (RFID Tag) unit 11 , a processing unit 12 , a display unit 13 and a power supply unit 14 . The RFID Tag unit 11 follows the RFID wireless communication standard to receive the wireless signal WS transmitted by the reading/writing device 2 and output identification information I _ID . In an embodiment, the communication frequency of the wireless frequency identification system may be below 135KHz, 13.56MHz, 860M-960MHz (UHF frequency band), 2.45GHz or 5.8GHz.

The display unit 13 is used for displaying identification information I _ID . The processing unit 12 is electrically connected with the RFID Tag unit 11 and the display unit 13 for receiving the identification information I _ID and outputting it to the display unit 13 for display. The power supply unit 14 supplies the power required for the processing unit 12 and the display unit 13 to operate. In an embodiment, the power supply unit 14 can be a battery module and/or an external power supply. For example, the battery module can be a rechargeable battery or a disposable battery. According to the standard of the RFID system, the RFID tag unit 11 can extract the radio frequency power V _RF from the wireless signal WS as the power required for the operation of the RFID tag unit 11 . Therefore, when the display device 1 of the present invention is in the standby state, the RFID Tag unit 11 does not consume extra power.

Referring to FIG. 2 , a display device 1 ′ according to another embodiment of the present invention may include a storage unit 15 . The storage unit 15 is electrically connected to the processing unit 12 for storing the identification information I _ID . For example, the storage unit 15 can be a memory or a hard disk. The processing unit can read the identification information I _ID from the storage unit 15 and process it into a wireless signal WS in RFID format. The wireless signal WS is transmitted to the read/write device 2 (as shown in FIG. 1 ) via the RFIDTag unit 11, so that two-way communication can be performed between the read/write device 2 and the display device 1 ', that is, read/write The input device 2 can write the identification information I _ID into the display device 1', and can read the identification information I _ID from the display device 1'.

According to the above structure, the built-in Electronic Erasable Programmable Read Only Memory (EEPROM) of the RFID Tag unit 11 can be removed. The identification information I _ID obtained by the RFID Tag unit 11 through the wireless signal WS can be directly output to the processing unit 12 without writing into the built-in EEPROM of the RFID Tag unit 11 . Since the power required for the display device to access the storage unit (such as internal memory or hard disk) is provided by the power supply unit 14, the read/write device 2 can write the identification information I _ID to the device with a longer communication distance. Display device 1.

In an embodiment, the display unit 13 may be a bi-stable display (Bi-Stable Display). For example, the display unit 13 can be a cholesteric liquid crystal display (Cholesteric LCD), a ferroelectric liquid crystal display (Ferroelectric LCD), an electrophoretic display (Electrophoretic Display, EPD), a switchable micro-electromechanical reflective (MEMs switchable reflector) display or an electronic display. Electrochromic films (Electrochromic films) displays. Since the bistable display only needs to consume power when updating the displayed information, the display device 1 of the present invention only needs to consume very low power or even no power when it is in standby, thereby further achieving the purpose of power saving . It should be noted that the display unit 13 is not limited to a bistable display. For example, when the display device 1 uses an external power source or a self-generated power source such as solar energy, the display unit 13 can also be an existing liquid crystal display or an organic light emitting diode (Organic Light Emitting Diodes, OLED) display that consumes more energy.

In addition, the size of the display unit 13 can be arbitrarily designed according to the requirements of use. For example, a display device 1 with a smaller-sized display unit 13 can be used as an electronic label (Label) to mark product-related information such as commodity prices, manufacturing dates, and origins; the display device 1 with a larger-sized display unit 13 The device 1 can be used as a digital photo frame; the display device 1 with a larger display unit 13 can be used as an electronic bulletin board.

To sum up the above, the display device and its display system of the present invention use the label in the radio frequency identification system as the wireless communication module, and use the power supply unit to provide the power required for updating information. Therefore, the display device of the present invention And its display system can update information with a longer communication distance, and saves more power than other wireless communication technologies. In addition, using a relatively power-saving bistable display as the display unit can further improve the power-saving effect. Moreover, the display device and its display system of the present invention replace the built-in EEPROM of the RFID Tag unit with a storage unit with a relatively high number of write times such as a memory or a hard disk, which can avoid being limited by only about 100,000 write times of the EEPROM.

The embodiments described above are only to illustrate the technical ideas and characteristics of the present invention, and its purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, but not to limit the present invention. Equivalent changes or modifications made in the spirit of the disclosure shall still be covered by the claims of the present invention.

Claims (20)

1. A display device, comprising: A radio frequency identification tag unit, which follows a radio communication standard of a radio frequency identification system to receive a radio signal and output identification information; a display unit for displaying the identification information; a processing unit, which is electrically connected with the wireless frequency identification tag unit and the display unit, and is used to receive the identification information and output it to the display unit for display; and A power supply unit supplies power required for the operation of the processing unit and the display unit. 2. The display device according to claim 1, further comprising: A storage unit is electrically connected with the processing unit and used for storing the identification information. 3. The display device according to claim 2, wherein the processing unit reads the identification information from the storage unit and processes it into a wireless signal, and the wireless signal is sent out via the radio frequency identification tag unit. 4. The display device as claimed in claim 2, wherein the storage unit is a memory or a hard disk. 5. The display device according to claim 1, wherein the communication frequency of the wireless frequency identification system is below 135KHz, 13.56MHz, 860M-960MHz, 2.45GHz or 5.8GHz. 6. The display device as claimed in claim 1, wherein the display unit is a liquid crystal display or an organic light emitting diode. 7. The display device as claimed in claim 1, wherein the display unit is a bistable display. 8. The display device as claimed in claim 1, wherein the display unit is a cholesteric liquid crystal display, a ferroelectric liquid crystal display, an electrophoretic display, a switchable MEMS reflective display or an electrochromic thin film display. 9. The display device as claimed in claim 1, wherein the power supply unit is a battery module and/or an external power supply. 10. The display device as claimed in claim 1, wherein the power supply unit is a rechargeable battery or a disposable battery. 11. A display system comprising: a read/write device that transmits and/or receives a wireless signal in accordance with a wireless communication standard of a radio frequency identification system; and A display device comprising: A radio frequency identification tag unit, which receives the wireless signal according to the wireless communication standard of the radio frequency identification system, and outputs identification information; a display unit for displaying the identification information; a processing unit, which is electrically connected with the wireless frequency identification tag unit and the display unit, and is used to receive the identification information and output it to the display unit for display; and A power supply unit supplies power required for the operation of the processing unit and the display unit. 12. The display system of claim 11, further comprising: A storage unit is electrically connected with the processing unit and used for storing the identification information. 13. The display system according to claim 12, wherein the processing unit reads the identification information from the storage unit and processes it into a wireless signal, and the wireless signal is transmitted through the radio frequency identification tag unit. 14. The display system as claimed in claim 12, wherein the storage unit is a memory or a hard disk. 15. The display system according to claim 11, wherein the communication frequency of the wireless frequency identification system is below 135KHz, 13.56MHz, 860M-960MHz, 2.45GHz or 5.8GHz. 16. The display system as claimed in claim 11, wherein the display unit is a liquid crystal display or an organic light emitting diode. 17. The display system of claim 11, wherein the display unit is a bistable display. 18. The display system as claimed in claim 11, wherein the display unit is a cholesteric liquid crystal display, a ferroelectric liquid crystal display, an electrophoretic display, a switchable MEMS reflective display or an electrochromic thin film display. 19. The display system as claimed in claim 11, wherein the power supply unit is a battery module and/or an external power supply. 20. The display system as claimed in claim 11, wherein the power supply unit is a rechargeable battery or a disposable battery.

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