1. Technical Field
The present disclosure relates to liquid crystal displays (LCD), and particularly, to an LCD with sapphire substrate.
2. Description of Related Art
LCDs generally include a protection glass made of common glass. However, the hardness, strength, and weather resistance of the protection glass are often less than satisfactory. As such, LCDs generally cannot be used in harsh environment conditions.
Therefore, it is desirable to provide an LCD, which can overcome the limitations described.
Embodiments of the disclosure will be described with reference to the drawings.
The common electrode layer 40 and the pixel electrode layer 60 are positioned on two sides of the liquid crystal layer 50. The upper polarizer 10 is positioned above the common electrode layer 40. The lower polarizer 70 is positioned under the pixel electrode layer 60. The protection glass 20 and the color filter 30 are positioned between the upper polarizer 10 and the common electrode layer 40, with the protection glass 20 close to the upper polarizer 10 and the color filter 30 close to the common electrode layer 40.
It should be understood, in order to protect the LCD 100, the protection glass 20 can be positioned above the upper polarizer 10, and the color filter 30 is positioned between the upper polarizer 10 and the common electrode layer 40.
The polarities of the upper polarizer 10 and the lower polarizer 70 are opposite to each other. In this embodiment, the upper polarizer 10 transmits P-polarity lights and blocks lights of other polarities, and the lower polarizer 70 transmits S-polarity lights and blocks lights of other polarities.
The protection glass 20 is made of sapphire, and the hardness, strength, and weather resistance of the protection glass 20 is greater than the hardness, strength, and weather resistance of a mother glass. The safety and the reliability of the LCD 100 are ensured.
The color filter 30 includes a filter substrate 31 and a color resist layer 32 covered on the filter substrate 31. The filter substrate 31 is made of sapphire. The color filter 30 filters light by wavelength ranges, such that the separate filtered intensities include information about the color of light.
The common electrode layer 40 is an indium tin oxide film deposited on the filter substrate 31 by a chemical vapor deposition. In this embodiment, the color resist layer 32 and the common electrode layer 40 are covered on two opposite sides of the filter substrate 31.
Liquid crystal molecules of the liquid crystal layer 50 are arrayed in an initial alignment direction. The liquid crystal molecules are driven by an electric field generated between the common electrode layer 40 and the pixel electrode layer 60.
The pixel electrode layer 60 includes a pixel substrate 61 and a circuit layer 62 formed on the pixel substrate 61. The pixel substrate 61 is made of sapphire. The circuit layer 62 is made of a transparent material.
In the embodiment, the sapphire is a gemstone variety of the mineral corundum, and has a hexagonal crystal structure. The main chemical component of sapphire is aluminum oxide, and the refractive index of the sapphire is from about 1.757 to about 1.760. The growth direction of the sapphire is a-axis (11
The touch panel 200 includes a touch substrate 201 and a touch layer 202 positioned on the touch substrate 201. The touch substrate 201 is made of sapphire. The touch layer 202 includes a number of X-axis sensors and a number of Y-axis sensors. The X-axis sensors and the Y-axis sensors are positioned on the touch substrate 201, and an arraying direction of the X-axis sensors is perpendicular to an arraying direction of the Y-axis sensors. The touch panel 200 acquires a touch position by an X-coordinate detected by the X-axis sensors and a Y-coordinate detected by the Y-axis sensors.
The touch panel 200 is positioned between the protection glass 20 and the color filter 30, with the touch layer 202 close to the protection glass 20 and the touch substrate 201 close to the color filter 30. As the touch substrate 201 of the touch panel 200 is made of sapphire, the damage of the touch panel 200 can be avoided in the process of touching.
In use, when the touch layer 202 covering the touch substrate 201 detects a touch operation on the upper polarizer 10, the touch panel 200 generates a touch signal to a controller. The controller controls the liquid crystal layer 50 displaying different images according to touch signals. As all of the filter substrate 31, the protection glass 20, the pixel substrate 61, and the touch substrate 201 are made of sapphire, the reliability of the LCD 100 and LCD 100a is increased.
Particular embodiments are shown and described by way of illustration only. The principles and the features of the present disclosure may be employed in various and numerous embodiments thereof without departing from the scope of the disclosure as claimed. The above-described embodiments illustrate the scope of the disclosure but do not restrict the scope of the disclosure.
Number | Date | Country | Kind |
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101125209 | Jul 2012 | TW | national |