Pixel Driving Chip Cascade for Reduced Display Bezel Area
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Solution Overview
Problem
Conventional light emitting display apparatuses have a bezel area due to the presence of pad parts for data and gate driving circuits, which cannot be completely minimized.
Innovation Solution
The use of cascade-connected pixel driving chips via a clock line eliminates the need for a gate driving circuit and gate line at one end of the display panel, allowing for time-divisional driving of light emitting devices without separate gate driving circuits, thereby reducing the number of pad parts and bezel area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a gate driving circuit and gate line are provided in the display panel, then the display apparatus can be driven with proper timing control, but the bezel area increases due to the pad part space required
Solution Approach 1:
The gate driving circuit function is extracted from the display panel and integrated into the pixel driving chip. The pixel driving chip receives a single clock signal and internally generates the necessary timing control signals, eliminating the need for separate gate driving circuitry and gate lines in the panel, thereby removing the pad part space and reducing bezel area while maintaining timing control reliability
Solution Approach 2:
The gate driving function is merged with the pixel driving function into a single pixel driving chip. This integration allows the chip to handle both pixel data processing and timing control internally, reducing the number of separate components and connections needed, which minimizes pad part space and bezel area
2Ease of operation
If multiple pad parts are disposed in the display panel for data and gate driving circuits, then the display can be driven with proper signals, but the bezel area cannot be minimized
Solution Approach 1:
The gate driving function is extracted from the display panel and integrated into the pixel driving chip. The pixel driving chip receives a single clock signal and internally generates the necessary timing control signals, eliminating the need for separate gate driving circuitry and gate lines in the panel, thereby removing the pad part space and reducing bezel area while maintaining timing control reliability
Solution Approach 2:
The pixel driving chip is designed to perform multiple functions: it processes pixel data, generates timing control signals, and drives the pixel circuit. This multi-functional design eliminates the need for separate dedicated gate driving circuits, reducing the number of pad parts required and minimizing bezel area
3Reliability
If a separate gate driving chip is provided, then the gate lines can be driven properly, but the manufacturing cost increases
Solution Approach 1:
The gate driving function is merged with the pixel driving function into a single pixel driving chip. This integration allows the chip to handle both pixel data processing and timing control internally, reducing the number of separate components and connections needed, which minimizes pad part space and bezel area
Solution Approach 2:
The pixel driving chip is designed to perform multiple functions: it processes pixel data, generates timing control signals, and drives the pixel circuit. This multi-functional design eliminates the need for separate dedicated gate driving circuits, reducing the number of pad parts required and minimizing bezel area
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach minimizes the bezel area, reduces manufacturing costs, and enables efficient driving of light emitting devices without a separate gate driving chip, enhancing the reliability and cost-effectiveness of the display apparatus.
Implementation Method 1
a clock line connecting a data driving chip to a plurality of pixels in cascade
Implementation Method 2
a plurality of light emitting devices respectively connected to the plurality of output terminals and sequentially receiving the driving current to emit light of different colors during a unit frame
Data Source
AI summary
Disclosed is a light emitting display apparatus. The light emitting display apparatus includes a plurality of pixels provided in a display area of a substrate and connected to a data line, a clock line, and a pixel driving power line. The plurality of pixels each include a pixel driving chip connected to the data line, the clock line, and the pixel driving power line to sequentially output a driving current through a plurality of output terminals thereof and a plurality of light emitting devices respectively connected to the plurality of output terminals. Accordingly, a gate driving circuit and a gate line connected to the gate driving circuit are removed from one end of a display panel and omitted, thereby minimizing the number of pad parts disposed in the display panel.