Legal claims defining the scope of protection, as filed with the USPTO.
1. A light emitting diode (LED) driving circuit applied to a LED module, the LED driving circuit comprising: a read address generating unit receiving a clock signal and outputting a reading signal; a memory cell, which is coupled to the read address generating unit and generates an output signal in accordance with the reading signal; a driving unit, which is coupled to the memory cell, receives the output signal and the clock signal, and outputs a driving signal to the LED module; a write address generating unit, which is coupled to the memory cell and outputs a writing signal to the memory cell in accordance with a latch enable signal; and a shift register coupled to the memory cell.
2. The LED driving circuit according to claim 1 , wherein the clock signal is a binary weighted clock signal.
3. The LED driving circuit according to claim 1 , wherein the read address generating unit comprises: a read address counter receiving the clock signal; and a read address decoder, which is coupled to the read address counter and outputs the reading signal.
4. The LED driving circuit according to claim 1 , wherein the driving signal has a plurality of turn-on time intervals in a duty cycle, and the turn-on time intervals are not continuous.
5. The LED driving circuit according to claim 1 , wherein the driving unit comprises: a flip-flop, which is coupled to the memory cell and receives the output signal and the clock signal; and a driver, which is connected to the flip-flop and outputs the driving signal.
6. The LED driving circuit according to claim 1 , wherein the memory cell is a two-port static random access memory.
7. The LED driving circuit according to claim 1 , wherein the write address generating unit comprises: a write address counter receiving the latch enable signal; and a write address decoder, which is coupled to the write address counter and outputs the writing signal.
8. A driving method of a light emitting diode (LED) module applied to a LED driving circuit, the LED driving circuit having a read address generating unit, a memory cell and a driving unit, the driving method comprising: receiving a clock signal and outputting a reading signal to the memory cell by the read address generating unit; generating an output signal in accordance with the reading signal by the memory cell; receiving the output signal and the clock signal and outputting a driving signal to the LED module by the driving unit; and outputting a writing signal to the memory cell in accordance with a latch enable signal through a write address generating unit.
9. The driving method according to claim 8 , wherein the clock signal is a binary weighted clock signal.
10. A light emitting diode (LED) driving device, applied to a plurality of LED modules, the LED driving device comprising: a plurality of memory cells coupled in parallel; a write address generating unit generating a writing signal in accordance with a latch enable signal; a read address generating unit receiving a clock signal and outputting a reading signal to each of the memory cells; and a plurality of driving units coupled to the corresponding memory cells, respectively, wherein one of the memory cells writes a gray scale signal in accordance with the writing signal, each of the memory cells outputs an output signal to the corresponding driving unit in accordance with the reading signal, each of the driving units outputs a driving signal to the corresponding LED module in accordance with the output signal and the clock signal.
11. The LED driving device according to claim 10 , wherein the clock signal is a binary weighted clock signal.
12. The LED driving device according to claim 10 , wherein the read address generating unit comprises: a read address counter receiving the clock signal; and a read address decoder, which is coupled to the read address counter and outputs the reading signal.
13. The LED driving device according to claim 10 , wherein the driving signal has a plurality of turn-on time intervals in a duty cycle, and the turn-on time intervals are not continuous.
14. The LED driving device according to claim 10 , wherein each of the driving units comprises: a flip-flop, which is coupled to the corresponding memory cell and receives the output signal and the clock signal; and a driver, which is connected to the flip-flop and outputs the driving signal.
15. The LED driving device according to claim 10 , wherein the memory cell is a two-port static random access memory.
16. The LED driving device according to claim 10 , wherein the write address generating unit comprises: a write address counter receiving the latch enable signal; and a write address decoder, which is coupled to the write address counter and outputs the writing signal.
17. A driving method of a light emitting diode (LED) module applied to a LED driving device, the LED driving device having a plurality of memory cells, a write address generating unit, a read address generating unit and a plurality of driving units, the driving method comprising: receiving a clock signal and outputting a reading signal to each of the memory cells by the read address generating unit; outputting an output signal to the corresponding driving unit in accordance with the reading signal by each of the memory cells; and outputting a driving signal to the corresponding LED module in accordance with the output signal and the clock signal by each of the driving units.
18. The driving method according to claim 17 , further comprising: generating a writing signal in accordance with a latch enable signal by the write address generating unit; and writing a gray scale signal in accordance with the writing signal by one of the memory cells.
Unknown
February 23, 2016
Browse 5M+ US patents with plain-English claim translations and AI-generated analysis.