Liquid crystal display device

Abstract

A liquid crystal display device of the present invention includes: a liquid crystal layer; a first substrate and a second substrate opposing each other with the liquid crystal layer being interposed therebetween; a reflection layer provided on one side of the liquid crystal layer that is closer to the first substrate; a polarizer provided on one side of the liquid crystal layer that is closer to the second substrate; a phase compensator provided between the liquid crystal layer and the polarizer and having a slow axis within a plane parallel to the liquid crystal layer; and at least a pair of electrodes for applying a voltage across the liquid crystal layer. The liquid crystal display device of the present invention includes a reflection region in which a display is produced by using light that enters the device from one side of the device that is closer to the second substrate, passes through the polarizer, the phase compensator and the liquid crystal layer in this order and is reflected by the reflection layer. The slow axis SL of the phase compensator is inclined from the direction D1 that is at an angle of 45 DEG with respect to the transmission axis TR of the polarizer.

Description

technical field [0001] This invention relates to liquid crystal display devices, and more particularly, to liquid crystal display devices capable of displaying images in reflective mode. Background technique [0002] Liquid crystal display devices are widely used as displays for PDAs (Personal Digital Assistants) because of their excellent characteristics, such as light weight, thin structure, and low power consumption. Among various other types of liquid crystal displays, reflective or transflective liquid crystal display devices are capable of displaying images using ambient light emitted by a reflective layer on the back of the liquid crystal layer (reflective mode displays). Therefore, it is possible to eliminate or reduce the use of a backlight which is indispensable in a transmissive liquid crystal display device, thereby further reducing power consumption. [0003] The reflective liquid crystal display 300 shown in FIG. 21 is well known in the art. The reflective li...

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Problems solved by technology

[0005] However, even if the optical path difference between the phase plate 320 and the liquid crystal layer 308 is optimally designed for a specific wavelength of black and white display (for example, a wavelength of 550nm in the visible light wavelength range of 400nm to 700nm, at which light has the highest visibility) , the optical path difference will also shift from the optimized design at other wavelengths, because the optical path difference of the phase plate 320 and the liquid crystal layer 308 has wavelength divergence, so the leakage and discoloration of light will be very obvious, especially in black display Thus, resulting in a substantial decrease in display quality

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