Pixel Chip Light Shielding for LED Driver IC False Lighting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In LED displays, the integration of a driver IC with light emitting diodes (LEDs) leads to unintended false lighting due to direct light entry into the IC, causing malfunction and reduced luminance, especially in active matrix systems where high luminance is desired.
Innovation Solution
A pixel chip design incorporating a light shielding section between the LEDs and the driver IC, along with a connection section to electrically connect them, prevents direct light entry and includes a columnar electric conductor to reflect any leaked light, thereby preventing false operation and lighting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the driver IC is arranged in the same plane as the LED to enable active matrix driving, then high luminance can be obtained, but light emitted from the LED enters the driver IC causing false lighting and malfunction
Solution Approach 1:
The pixel chip is divided into distinct functional regions: a light emitting region for the LED and a non-light emitting region for the driver IC. This spatial segmentation prevents light from the LED from directly entering the driver IC, eliminating false lighting while maintaining active matrix driving capability and high luminance output.
Solution Approach 2:
The driver IC is extracted from the light emitting region and placed in a separate non-light emitting region. This extraction removes the driver IC from the path of emitted light, preventing optical interference and malfunction while preserving the electrical connection and control functions necessary for high luminance operation.
2Device complexity
If the driver IC is integrated with the LED in the pixel chip, then the structure is compact and active matrix driving is enabled, but light emitted from the LED causes the TFT in the driver IC to malfunction
Solution Approach 1:
The pixel chip structure is segmented into a light emitting region containing the LED and a non-light emitting region containing the driver IC with TFTs. This segmentation maintains the compact integrated structure while spatially separating the light source from the sensitive electronic components, preventing TFT malfunction caused by direct light exposure.
3Ease of manufacture
If the LED and driver IC are arranged in the same plane for simple wiring, then manufacturing is easier, but light emitted from the LED directly enters the driver IC causing unintended current flow
Solution Approach 1:
The pixel chip is segmented into functional regions that simplify wiring within each zone while preventing optical interference. The light emitting region and non-light emitting region are spatially separated, allowing simple wiring connections without direct light paths between LED and driver IC, thus preventing unintended current flow while maintaining ease of manufacture.
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
The solution effectively reduces false lighting and ensures high luminance by blocking direct light entry into the driver IC, maintaining the LED's operational integrity and enhancing display quality.
Implementation Method 1
a light shielding section that is arranged between the light emitting device and the driver IC, and blocks direct entrance of light emitted from each of the light emitting devices into the driver IC
Data Source
AI summary
There are provided a pixel chip capable of preventing false lighting of a light emitting device, a display panel including the pixel chip as a pixel, a lighting panel including the pixel chip as a pixel, a display unit including the display panel, and a lighting unit including the lighting panel. The pixel chip includes: one or a plurality of light emitting devices; a driver IC driving the light emitting devices; a connection section that is arranged between the light emitting devices and the driver IC, and electrically connects the light emitting devices to the driver IC; and a light shielding section that is arranged between the light emitting devices and the driver IC, and blocks direct entrance of light emitted from each of the light emitting devices into the driver IC together with the connection section.