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LCD Drive

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Block Diagram - LCD Drive

Design Considerations
A liquid crystal display (LCD) is a thin, flat electronic visual display that uses the light modulating properties of liquid crystals (LCs). They are used in a wide range of applications including: computer monitors, television, instrument panels, consumer electronics, portable medical devices, signage, etc. LCDs are common in portable devices since they are compact, lightweight, portable, low cost, and energy efficient. They are available in a wide range of screen sizes and are used in various applications to enhance the user interface and functionality.

The PSoC Segment LCD (LCD_Seg) component can directly drive a variety of LCD glass at different voltage levels with multiplex ratios up to 16x. PSoC provides much more integration than competitive LCD Drive solutions from fixed microcontrollers. PSoC can support up to 16 Commons requiring fewer pins for LCD, and can drive up to 736 LCD Segments with no Helper Chip enabling complex, large displays. PSoC supports LCD Drive on every GPIO making the hardware design of the LCD Display easier with PSoC. PSoC's internal bias generation eliminates the need for any external hardware and allows for software based contrast adjustment. Using the high efficiency integrated Boost Converter, the glass bias may be at a higher voltage than the PSoC supply voltage. This allows increased display flexibility in portable applications.

The PSoC Creator Software IDE revolutionizes the software design required for LCD Drive design. With an easy to use pin selection table and automated contrast control, PSoC Creator eliminates hours of code development required with traditional, fixed microcontrollers.

Application Notes

AN52927 - PSoC® 3 and PSoC 5LP - Segment LCD Direct Drive

AN56384 - PSoC® 1 Segment LCD Direct Drive
AN56384 explains implementation of software based multiplexed segment lcd driver in psoc® 1 device.

Development Kits/Boards

Avnet Spartan-6 LX16 PSoC 3 Kit
Buy "Avnet Spartan-6(TM) LX16 Kit" from Avnet Today

CY8CKIT-001 PSoC® Development Kit

CY8CKIT-006 PSoC® 3 LCD Segment Drive Evaluation Kit (OBSOLETE)

CY8CKIT-029 PSoC® LCD Segment Drive Expansion Board Kit
The CY8CKIT-029 PSoC® LCD Segment Drive Expansion Board Kit allows you to evaluate PSoC's LCD drive capability using LCD segment component in Cypress's PSoC Creator™.

Training On-Demand

Software and Drivers

PSoC Creator
PSoC Creator is a state-of-the-art software development IDE combined with a revolutionary graphical design editor to form a uniquely powerful hardware/software co-design environment.

PSoC Designer
PSoC Designer is the revolutionary Integrated Design Environment (IDE) that you can use to customize PSoC to meet your specific application requirements. PSoC Designer software accelerates system bring-up and time-to-market.

Spec No: None; Sunset Owner: HMI; Secondary Owner: YMT; Sunset Date: 06/15/20