Driving circuit and method for driving a pixel

A unified CMOS ASIC driver design with pMOS and nMOS transistors and a metal base addresses the flexibility and cost issues of existing display technologies by enabling seamless switching between common-cathode and common-anode configurations, improving display performance and reducing manufacturing costs.

EP4524943A1Pending Publication Date: 2025-03-19MICLEDI MICRODISPLAYS BV
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Patent Information

Application Number
EP2023197615
Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2023-09-15
Publication Date
2025-03-19

AI Technical Summary

Technical Problem

Existing display technologies face limitations in flexibility and cost due to the need for separate driver circuitry for common-cathode and common-anode configurations, which are time-consuming and costly to design and manufacture.

Method used

A unified CMOS ASIC driver design that includes pMOS and nMOS transistors with a metal base for connecting drain terminals to an output terminal, allowing switching between common-cathode and common-anode configurations, along with a high voltage switch for reliable signal transfer and reduced transistor count.

Benefits of technology

Facilitates flexible selection of display configurations with minimal cost and enhances display performance by enabling fast and reliable switching between drive transistors, reducing metal congestion and power consumption.

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Abstract

A driving circuit (100) is provided for driving a pixel of a display. The driving circuit comprises at least one pMOS type transistor (110) comprising a gate terminal (111), a source terminal (112), and a drain terminal (113); at least one nMOS type transistor (120) comprising a gate terminal (121), a source terminal (122), and a drain terminal (123); and a metal base (130) comprising an output terminal (131). In this regard, the metal base (130) is configured to connect the drain terminal (113) of the at least one pMOS type transistor (110) or the drain terminal (123) of the at least one nMOS type transistor (120) to the output terminal (131) to output a driving signal (132) for driving the pixel.
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