Staggered U-Shaped TFT Distribution in LTPS Displays

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Solution Overview

Problem

The existing display panel technologies face challenges with high power consumption and low aperture ratio, particularly in achieving the display effect of dot inversion while using column inversion mode, which affects the competitiveness and efficiency of the product.

Innovation Solution

The proposed solution involves a specific distribution of TFT components in the LTPS process, where a pair of parallel data lines are arranged between rows of pixels with U-shaped TFTs connected in a staggered manner, and the gate lines are arranged in an S-shaped pattern around each column, reducing the transparent area occupied by TFTs and improving the aperture ratio, allowing for dot inversion display mode with reduced power consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If dot inversion mode is used to achieve the display effect, then the display quality is improved, but the power consumption increases significantly

Engineering Contradiction:

Improvedisplay qualityVSAvoidpower consumption

Core Design Contradiction:

Illumination intensityVSUse of energy by moving object

Solution Approach 1:

The patent applies inversion principle by using column inversion mode (inverting adjacent columns with opposite polarities) instead of dot inversion mode, while achieving dot inversion display effect through specific TFT connection arrangements where alternate pixels within each column are connected to different data lines with opposite voltage polarities

Inventive Principle:

Principle #13The other way round (Inversion)

2Ease of manufacture

If traditional TFT distribution is used in LTPS process, then the manufacturing process is simple, but the aperture ratio is reduced due to occupied transparent area

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidaperture ratio

Core Design Contradiction:

Ease of manufactureVSArea of stationary object

Solution Approach 1:

The patent utilizes the vertical dimension by arranging U-shaped TFTs in staggered positions between adjacent pixel rows, with openings facing each other in alternating rows. This three-dimensional spatial arrangement allows TFT components to occupy less horizontal transparent area while maintaining electrical connectivity, thereby increasing aperture ratio without complicating the manufacturing process

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentUS10319748B2Distribution of TFT components in LTPS process

Publication Date: 2019.06.11 WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD

AI summary

Disclosed is a distribution of TFT components in the LTPS process. A pair of parallel data lines are arranged between an ith and (i+1)th rows of pixels. Each pair of data lines includes a first data line and a second data line. Two adjacent pixels of the ith row are respectively connected to the first data line and the second data line through corresponding U-shaped TFT components. Two pixels of the (n+1)th row corresponding to the two above adjacent pixels are respectively connected to the second data line and the first data line through corresponding U-shaped TFT components. The U-shaped TFT component of the pixel of the ith row and the U-shaped TFT component of the corresponding pixel of the (i+1)th row are disposed with openings thereof facing and staggered with each other. An aperture ratio of a product can be effectively increased by the staggered setting of the U-shaped TFT components. The use of such setting can realize dot inversion in the case of column inversion and reduce the power consumption of the product.