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Macroblock’s Common Cathode Driving Architectures are Patented in the US
Patent no.: US 11,132,940,B2;
Patent no.: US 11,132,939,B2;
You can use Patent Public Search Basic of USPTO for more details
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MBI5759 is an advanced LED driver with whole new high integration architecture, which is built by 48 constant current source output channels and 32 switches packed into a compact BGA package. This provides the simplicities and modularity of the driver scheme design.
MBI5759 is designed for LED video display applications using Pulse Width Modulation (PWM) control with selectable 16 / 15 / 14 / 13-bit color depth. MBI5759 features a 48-bit shift register that converts serial input data into each pixel’s grayscale of the output port. The forty-eight regulated current ports are designed to provide uniform and constant current sinks for driving LEDs with a wide range of VF variations. The output current can be preset through an external resistor. The innovative architecture with embedded SRAM is designed to support up to 1:32 time-multiplexing applications. Users only need to send the whole frame data once and to store it in the embedded SRAM of the LED driver, instead of sending it every time when the scan line is changed. It helps to save the data bandwidth and to achieve high grayscale with a very low data clock rate. With scan-type Scrambled-PWM (S-PWM) technology, MBI5759 enhances PWM by scrambling the “on” time of each scan line into several “on” periods and sequentially drives each scan line for a short “on” period. The enhancement equivalently increases the visual refresh rate of scan-type LED displays.
MBI5759 drives the corresponding LEDs to the brightness specified by image data. With MBI5759, all output channels can be built with 16-bit color depth (65,536 grayscale), even in a high time-multiplexing driving scheme design. When building a 16-bit color depth video, S-PWM technology reduces the flickers and improves the image fidelity.
A whole new control interface adoption in MBI5759 allows fewer control signals between controller and driver chips, and this improves the reliabilities since the wire connections are simplified
To further reduce the power consumption of the LED display, a smart power-saving mode with multiple ways will reduce driver IC power consumption dynamically whether SDI data are all zero or non-zero. No matter the LED display is playing video content or in standby mode, the power consumption can be much reduced.
MBI5759 (Patented) Specification
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ItemsSpec.Content
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01LED TypeCommon cathode
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02Scan TypeTypical
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03No. of Output Channel48
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04Output Current per Channel0.5~15mA
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05Sustaining Output Voltage7V
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06Excellent Output Current Accuracy-between channels<±1.5％ (typ.)
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07Excellent Output Current Accuracy-between ICs<±1.5％ (typ.)
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08Embedded MOSFET32
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09Scan DesignUp to 32-scan
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10Error Detection - LED Open
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11Error Detection - LED Short
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12LED Failure Prediction
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13Current GainGlobal/ RGB
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14PWM Enhancement
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15GCLK Multiplier
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16Intelligent Power Saving
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17S-PWM13/14/15/16-bit
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187 Challenges - Ghosting Elimination
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197 Challenges - High Contrast Interference Elimination
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207 Challenges - Color Shift Elimination
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217 Challenges - Non-uniformity (IC Controlled)Elimination
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227 Challenges - Dim Line at the First Line Elimination
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237 Challenges - Gradient Dim Line Elimination
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247 Challenges -Dead Pixel Isolation
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25RoHS Compliant PackageBGA104
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26Major ApplicationsTime-multiplexing LED display
