Lighting apparatus

Patent metadata

Field	Value
Publication number	US-12556276-B2
Application number	US-202318222617-A
Country	US
Kind code	B2
Filing date	Jul 17, 2023
Priority date	Jul 17, 2023
Publication date	Feb 17, 2026
Grant date	Feb 17, 2026

Abstract

A lighting apparatus includes a light source, a power module, a controller, a data input module, a serial-to-parallel converter module, an orthogonal frequency division multiplexing (OFDM) modulation module, a radio frequency (RF) upconversion module and an antenna module. The light source including multiple types of LED modules. The controller generates multiple driving currents supplied to the LED modules. The data input module is coupled to the controller. The data input module receives input data to be transmitted. The serial-to-parallel converter module converts the input data into multiple parallel data streams. The orthogonal frequency division multiplexing (OFDM) modulation module modulates the parallel data streams onto multiple orthogonal subcarriers. The antenna module includes multiple antennas configured to transmit RF signals corresponding to the multiple data streams.

First claim

The invention claimed is:

1 . A lighting apparatus, comprising:
a light source comprising multiple types of LED modules; a power module for converting an AC power to a DC power; a controller for generating multiple driving currents supplied to the LED modules; a data input module coupled to the controller, wherein the data input module receives input data to be transmitted; a serial-to-parallel converter module configured to convert the input data into multiple parallel data streams; an orthogonal frequency division multiplexing (OFDM) modulation module configured to modulate the parallel data streams onto multiple orthogonal subcarriers, wherein each subcarrier is associated with a specific frequency and carries a portion of the parallel data streams; a radio frequency (RF) upconversion module configured to upconvert the multiple data streams to multiple desired transmission frequencies; and an antenna module comprising multiple antennas configured to transmit RF signals corresponding to the multiple data streams, wherein the input data are generated by the controller according to transmitted data of an electronic device connected to the controller, wherein the electronic device is coupled to the controller via a second network with a different protocol from a first network of the OFDM modulation module, wherein there are multiple electronic devices wirelessly connected to the OFDM modulation module to share the OFDM modulation module to transmit data of the multiple electronic devices.

2 . The lighting apparatus of claim 1 , wherein the electronic device is coupled with a same housing used for disposing the light source, wherein the controller adjusts the light source for the electronic device to operate normally.

3 . The lighting apparatus of claim 2 , wherein the electronic device is a camera device, wherein recorded video of the camera device is encoded by the OFDM modulation module and sent to an external device over the Internet via the antenna module.

4 . The lighting apparatus of claim 1 , wherein the electronic device communicates with an external device over Internet via the OFDM modulation module.

5 . The lighting apparatus of claim 1 , wherein the OFDM modulation module is shared with the electronic device, wherein the electronic device disables another OFDM modulation module of the external device for routing output data of the electronic device to the OFDM modulation module via the second network.

6 . The lighting apparatus of claim 5 , wherein the electronic device also has a light source for providing illumination together with the lighting apparatus.

7 . The lighting apparatus of claim 6 , wherein the second network is an optical modulation network, wherein data transmission between the lighting apparatus and the electronic device is modulated over an emitted light of the electronic device.

8 . The lighting apparatus of claim 1 , wherein the electronic device is a sensor for collecting ambient information aside the lighting apparatus, wherein the lighting apparatus is fixed to a stationary platform.

9 . The lighting apparatus of claim 1 , wherein the electronic device sends a connection parameter to the controller via the second network for the controller establishes the first network for operating the OFDM modulation module.

10 . The lighting apparatus of claim 1 , further comprising a pilot insertion module configured to insert pilot symbols into the modulated parallel data streams at predetermined positions for channel estimation and equalization.

11 . The lighting apparatus of claim 10 , further comprising a mapping module and an inverse fast Fourier transform (IFFT) module, wherein the mapping module maps the modulated and pilot inserted parallel data streams onto time-frequency resource blocks, wherein the IFFT module performs an inverse fast Fourier transform on the mapped time-frequency resource blocks to generate time-domain OFDM signals.

12 . The lighting apparatus of claim 11 , further comprising a cyclic prefix insertion module and a digital-to-analog converter module, wherein the cyclic prefix insertion module inserts a cyclic prefix to the time-domain OFDM signal to mitigate inter-symbol interference, wherein the digital-to-analog converter module converts the time-domain OFDM signals to analog signals.

13 . The lighting apparatus of claim 12 , further comprising a power amplification module, wherein the power amplification module amplifies the RF signals to a suitable power level for transmission.

14 . The lighting apparatus of claim 1 , wherein the OFDM modulation module and the RF upconversion module are placed in a second compartment, wherein the light source is placed in a first compartment, wherein there is a heat insulation layer between the first compartment and the second compartment.

15 . The lighting apparatus of claim 1 , wherein the antenna module has multiple antenna areas for transmitting different RF signals at the same time.

16 . The lighting apparatus of claim 15 , wherein a metal heat dissipation unit is used for dissipating heat of the light source, wherein the antenna areas uses the metal heat dissipation unit as a ground.

17 . The lighting apparatus of claim 1 , further comprising a manual switch, wherein the manual switch is disposed on a light housing for holding the light source, wherein a user operates the manual switch to enable or disable the OFDM modulation module.

Assignees

• Leedarson Lighting Co Ltd

Inventors

• Lin Yusheng

Classifications

• H04B10/502

  LED transmitters · CPC title

• H05B45/37

  Converter circuits · CPC title

• H05B47/19

  via wireless transmission · CPC title

• H04L27/2628 Primary

  Inverse Fourier transform modulators, e.g. inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators (H04L27/2634 takes precedence) · CPC title

• H04B10/116 Primary

  Visible light communication · CPC title