(July 12, 2021) According to recent market dynamics, it can be predicted that FALD (Full Array Local Dimming) mini-
LED
will become a mainstream technology for LCD display backlight. While,
Macroblock has aggressively deployed in this area two years ago,
launching suitable solutions for different LCD display sizes, and
working with our clients to bring better display performance to
consumers. Below please find the description of backlight ICs and system
structures for two kinds of the LCD display. One is small- to
medium-size LCD displays and the other one is medium- to large-size LCD
displays.
Macroblock has launched suitable backlight solutions for different LCD display sizes
Small- to Medium-size LCD Displays
Suggested ICs: For small- to medium-size LCD displays (like
laptops or tablets), Macroblock has released mini-LED backlight driver
ICs: MBI6322 and MBI6334. MBI6322 is a highly integrated LED driver IC
with a built-in switch (MOSFET); MBI6334 was designed specifically for
narrow PCBs because of its long BGA package. MBI6322 and MBI6334 both
meet the compact requirement of small- to medium-size LCD displays.
Furthermore, MBI6322 and MBI6334 do not need to apply MCU to handle the
dimming signal of the mini-LED backlight matrix. They can choose
commercially available T-con ICs or bridge ICs directly, which allows
them to maintain the design requirement of small- to medium-size LCD
displays.
LCD Display Size | Small- to Medium-Sized |
Application Areas | Laptops and Tablets |
Macroblock Backlight Driver IC | MBI6322 | MBI6334 |
Product Feature | Integrate MOSFET | Adopt Long BGA Package |
Need MCU Or Not | No Need | No Need |
Macroblock backlight driver ICs correspond to small- to medium-size LCD displays
System Design: When small- to medium-size LCD displays apply
FALD backlighting architecture, they use T-con ICs or bridge ICs to
accept data from the frontend source. After the data pass through the
IC, the signal is split into two paths. As the picture shown below, the
blue path passes the timing control logic to the LCD driver IC, which
controls the LCD panel, and the orange path sends the local dimming
algorithm to the mini-LED backlight driver IC, which controls the
mini-LED backlight matrix.
The system architecture of small- to medium-size LCD displays
Medium- to Large-size LCD Display
Suggested ICs: For medium- to large-size LCD displays (like
TVs, PIDs or monitors), Macroblock has released mini-LED backlight
driver ICs: MBI6353 and MBI6328. MBI6353 is a high-current design for
multiple LEDs in parallel, and the high-voltage MBI6328 supports
multiple LEDs in cascade. Considering design flexibility and function
requirement, most of the medium- to large-size LCD displays will apply
“MCU”. There are commercially available MCUs for MBI6328 and MBI6353,
including Nuvoton’s M484.
LCD Display Size | Medium- to Large-Sized |
Application Areas | TVs, PIDs, Monitors |
Macroblock Backlight Driver IC | MBI6353 | MBI6328 |
Product Feature | high-current design | high-voltage design |
Need MCU Or Not | Optional | Need |
Macroblock backlight driver ICs correspond to medium- to large-size LCD displays
System Design: When medium- to large-size LCD displays apply
FALD backlighting architecture, they use MNT SoCs or TV SoCs to accept
data from the frontend source. After the data pass through the IC, the
signal is split into two paths. As the picture shown below, the blue
path passes the timing control logic to the LCD driver IC, which
controls the LCD panel, and the orange path sends the local dimming
algorithm to “MCU” firstly, which then passes to the mini-LED backlight
driver IC, which controls the mini-LED backlight matrix.
The system architecture of medium- to large-size LCD displays
Macroblock is quite optimistic that FALD mini-LED will become the
mainstream technology of LCD display backlight in the near future. The
company will continue to devote to the R&D of the mini-LED backlight
driver IC product line to provide competitive solutions to our clients
and fulfill customers’ various application purposes. We look forward to
bringing marvelous visual experience to the end-users.
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