Display device and method of manufacturing liquid crystal display panel

By using a combination of transparent conductive materials and local metal segments in the sensing area of ​​the liquid crystal display panel, the problem of reduced transmittance is solved, the recognition rate of optical devices is improved, and the compatibility of manufacturing processes is maintained.

CN122307975APending Publication Date: 2026-06-30LG DISPLAY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
LG DISPLAY CO LTD
Filing Date
2025-09-26
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

In the sensing area of ​​a liquid crystal display panel, the presence of a polarizing plate, a liquid crystal layer, and a color filter layer reduces the transmittance of incident light, affecting the recognition accuracy of optical devices.

Method used

Data lines are formed using transparent conductive materials such as ITO or IZO, and metal segments are locally applied in the area where the data lines intersect with the gate lines to eliminate the black matrix in most areas of the sensing region. At the same time, the arrangement of color filters is adjusted to reduce the attenuation of transmitted light. The patterning of transparent and metal materials is achieved through a single photolithography step using halftone masks.

Benefits of technology

It improves the transmittance of the sensing area of ​​the liquid crystal display panel, thereby improving the recognition rate of optical devices such as cameras or infrared sensors, and the process is compatible with existing manufacturing processes without increasing manufacturing complexity.

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Abstract

A display device and a method for manufacturing a liquid crystal display panel are disclosed to improve the transmittance of a sensing area, thereby increasing the recognition rate of optical devices. The display device includes: a liquid crystal display panel comprising an active region and a bezel region located outside the active region, wherein a plurality of pixel regions are defined in the active region by a plurality of intersecting gate lines and a plurality of data lines, wherein the active region has a sensing area; a backlight unit located below the liquid crystal display panel; and optical devices configured to detect external light passing through the sensing area of ​​the liquid crystal display panel or to capture an image, wherein the data lines disposed in the active region other than the sensing area comprise a metallic material, and the data lines disposed in the sensing area comprise a transparent conductive material, thereby improving the optical transmittance through the sensing area without requiring an additional masking process during manufacturing.
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