Load drive circuit, light emitting diode driver, and display device
US-2024397595-A1 · Nov 28, 2024 · US
PWM controlling circuit and LED driver circuit having the same
US8941327B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8941327-B2 |
| Application number | US-201213397864-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 16, 2012 |
| Priority date | Feb 18, 2011 |
| Publication date | Jan 27, 2015 |
| Grant date | Jan 27, 2015 |
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Abstract
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A Light Emitting Diode (LED) driver circuit and a Pulse Width Modulation (PWM) controlling circuit thereof is provided. The LED driver circuit includes a voltage detector connected to a plurality of LED arrays, the voltage detector being configured to determine a connection status of each of the LED arrays according to a level of a feedback voltage of each of the LED arrays, and detect a minimum feedback voltage from the feedback voltage of each of the LED arrays that are determined to be connected, a controller configured to output a control signal to control boosting of the LED arrays according to the detected minimum feedback voltage, a PWM signal generator configured to output a PWM signal corresponding to the outputted control signal, and a driving voltage generator configured to supply a driving voltage commonly to the LED arrays according to the PWM signal.
First claim
Opening claim text (preview).
What is claimed is: 1. A Light Emitting Diode (LED) driver circuit comprising: a voltage detector configured to: determine, for a plurality of LED arrays, whether each of the LED arrays is connected to the voltage detector based upon a corresponding feedback voltage signal; output a selection signal indicating whether all of the LED arrays are connected to the voltage detector; and detect a minimum feedback voltage among the feedback voltage signals corresponding to the LED a…
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Electricity · mapped topic
- H05B45/46Primary
Electricity · mapped topic
- H05B33/0827Primary
Electricity · mapped topic
Cross-Sectional Technologies · mapped topic
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Frequently asked questions
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- What does patent US8941327B2 cover?
- A Light Emitting Diode (LED) driver circuit and a Pulse Width Modulation (PWM) controlling circuit thereof is provided. The LED driver circuit includes a voltage detector connected to a plurality of LED arrays, the voltage detector being configured to determine a connection status of each of the LED arrays according to a level of a feedback voltage of each of the LED arrays, and detect a minimu…
- Who is the assignee on this patent?
- Ryu Beom-Seon, Lim Chang-Sik, Kang Tae-Kyoung, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification H05B45/46. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jan 27 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).