Transflective liquid crystal display panel, liquid crystal display module and liquid crystal display thereof

Abstract

A transflective LCD panel includes scan lines, data lines, transmissive pixels and reflective pixels. Each transmissive pixel is configured to receive a transmissive pixel voltage transmitted from one of the data lines and displays a first gray level related to the transmissive pixel voltage. Each reflective pixel receives a reflective pixel voltage transmitted from one of the data lines and displays a second gray level related to the reflective pixel voltage. When the transmissive pixel and the reflective pixel are used to display a same gray level, the transmissive pixel voltage and the reflective pixel voltage are predetermined such that corresponding first and second gray levels substantially equal each other.

Description

[0001]This application claims the benefit of Taiwan application Serial No. 95143644, filed Nov. 24, 2006, the subject matter of which is incorporated herein by reference in its entirety.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The invention relates in general to a transflective liquid crystal display (LCD), and more particularly to a transflective LCD having a transmissive pixel and a reflective pixel, which are respectively controlled by different pixel voltages.[0004]2. Description of the Related Art[0005]In a conventional transflective liquid crystal display (LCD), such as a vertically-aligned (VA) mode transflective LCD, each pixel has a pixel electrode and a reflective electrode electrically connected to each other. The pixel electrode and the reflective electrode respectively form a transmissive region and a reflective region, and the pixel electrode and the reflective electrode are driven by the same pixel voltage. As for the transmissive region, the pi...

AI Technical Summary

Benefits of technology

The present invention provides a transflective LCD panel with improved image quality. The panel includes a liquid crystal layer, scan lines, data lines, transmissive pixels, and reflective pixels. The transmissive pixels display a first gray level related to a transmissive pixel voltage, while the reflective pixels display a second gray level related to a reflective pixel voltage. When the transmissive and reflective pixels display the same gray level, the driving circuit adjusts the original gray level to match the spectrum sensed by the photosensor unit, resulting in the same brightness for both pixels. The invention allows for independent control of the transmissive and reflective pixels, enhancing the image quality and effect of the display.

Problems solved by technology

Therefore, in the pixel structure of the conventional transflective LCD, it is difficult for one pixel voltage V to make the transmissive region and the reflective region display the same gray level.

Therefore, the transmissive region and the reflective region in one pixel cannot simultaneously reach the desired displaying effect.

However, the same set of pixel voltages are used, so it is impossible to make the transmissive region and the reflective region simultaneously display the four same gray levels.

However, the manufacturing processes are complicated and expensive.

However, the light of the transmissive region only comes from the backlight source, and its brightness and color cannot change with the change of the environmental light.

Therefore, if the transmissive region and the reflective region are driven by the same pixel voltage, the brightness or colors co-presented by the transmissive region and the reflective region often deviate from the optimum settings, which are set when the product is finished and ready to be shipped out, so that the incongruent condition is obtained when the environmental light changes with the changes of the time and the environment.

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