Liquid crystal display

Abstract

A liquid crystal display (LCD) includes: a substrate including a light transmitting region and a light blocking region; a thin film transistor disposed in the light blocking region, the thin film transistor including a source electrode, a drain electrode, and a gate electrode; a first insulating layer disposed on the drain electrode, the first insulating layer including a contact hole for exposing the drain electrode; a pixel electrode disposed on the first insulating layer, the pixel electrode connected to the drain electrode through the contact hole; and a protruding portion disposed on the pixel electrode, wherein the pixel electrode includes: a stem portion disposed in the light transmitting region; a plurality of branch portions connected to the stem portion; and an extension disposed in the light blocking region, the extension configured to extend from the stem portion or the branch portions, and wherein the protruding portion overlaps the extension.

Description

[0001] Cross References to Related Applications [0002] This application claims priority and benefit from Korean Patent Application No. 10-2015-0011105 filed on Jan. 23, 2015, as fully set forth herein, which is hereby incorporated by reference for all purposes. technical field [0003] Exemplary embodiments relate to liquid crystal displays (LCDs). More particularly, the exemplary embodiments relate to LCDs for improving the control of orientations of liquid crystal molecules. Background technique [0004] A display device such as a liquid crystal display (LCD), an organic light emitting diode (OLED) display, etc. generally includes: a display panel including a plurality of pixels (including switching elements) and a plurality of signal lines; a grayscale voltage generator for generating a reference a grayscale voltage; and a data driver generating a plurality of grayscale voltages using the reference grayscale voltage and applying the generated grayscale voltage correspo...

AI Technical Summary

Problems solved by technology

After the external force is removed, the arrangement of the liquid crystal molecules is almost completely restored, but due to the step difference in the contact hole and the inclination of the alignment layer above it, the liquid crystal molecules at the position of the contact hole may still be abnormal

[0013] Specifically, when the insulating layer formed with the contact hole includes an organic material, the steps of the contact hole are further increased, making it difficult to restore the liquid crystal molecules around the contact hole to have the original arrangement.

[0014] Therefore, the abnormal arrangement of liquid crystal molecules generated around the contact hole may affect the arrangement of liquid crystal molecules arranged on adjacent pixel electrodes, and affect the arrangement of liquid crystal molecules arranged in the light-transmitting region of the pixel.

[0015] Therefore, in the light-transmitting region of the pixel, the texture due to the liquid crystal molecules arranged in the abnormal direction deteriorates the display quality, and in particular, since the LCD has a higher resolution and a smaller pixel size, in a single pixel The ratio of the textured area in the light-transmissive area increases, resulting in a deterioration in display quality due to the more easily identifiable texture and the increase in the amount of brightness variation of the pixel

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