Liquid crystal cells – elements and systems – Particular structure – Particular illumination
Reexamination Certificate
2002-06-10
2004-05-18
Parker, Kenneth (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Particular illumination
C349S042000, C257S089000
Reexamination Certificate
active
06738113
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of Invention
The invention relates to the structure of a TFT (Thin Film Transistor) LCD (Liquid Crystal Display) and the method for making the same. More particularly, the invention relates to the structure of an organic light-emitting material TFT LCD and the method for making the same.
2. Related Art
The light-emitting methods in the existing TFT LCD's can be classified as active and passive ones. Early light-emitting methods are all passive. A backlight source is used at the back of a glass substrate as the light source. A TFT IC (Integrated Circuit) on the glass substrate is used to control the liquid crystal layer between the glass substrate and a transparent conductive glass, so that the liquid crystal layer becomes transparent or opaque. Afterwards, the light passing through the liquid crystal layer is further filtered by color filter plates so that the emitted light can be red, green or blue. Through signal processing, light beams of three different colors are mixed to produce colorful images. This kind of passive light-emitting methods requires the use of a backlight source and the opening of the LCD has to be adjusted to obtain better light intensity.
With continuous researches and development in light-emitting materials, using light-emitting materials as the light sources of TFT LCD's becomes the trend in modern technologies. Using light-emitting organic materials as the light source in the TFT LCD and using TFT's to control the light-emitting material or the driving circuit for providing a voltage to the light-emitting material can easily control the bright spots on the LCD. The structure and manufacturing method for TFT LCD's can thus be greatly simplified.
The industry has developed mature technologies in producing red, blue and green organic light-emitting materials. Not only can they be used on an LED (Light-Emitting Diode) body, they can also be used as the light source of TFT displays. Since using organic light-emitting materials as the light sources of TFT displays only requires the use of the photolithographic and etching procedures to define the pattern on an organic light-emitting material layer, the yield can be effectively increased without being limited by the liquid crystal layer.
Therefore, it is desirable to have a new structure of TFT LCD, which uses red, blue and green light-emitting organic materials as the light source of the LCD and produces colorful images using a photo mask pattern. Furthermore, a manufacturing method for making the above-mentioned light source is proposed to more effectively assemble the LCD's.
SUMMARY OF THE INVENTION
The invention provides a structure of an organic material TFT LCD and its manufacturing method. The invention uses a red-blue-green organic light-emitting pattern layer as the light source of the LCD. TFT's are employed to control whether the organic light-emitting pattern layer emits light.
The invention provides a structure of an organic material TFT LCD and its manufacturing method. The invention uses a red, blue and green organic light-emitting materials as light sources. The color light emissions are directly modulated and controlled to produce color images without the use of color filters.
The invention provides a structure of an organic material TFT LCD and its manufacturing method. The invention uses a red, blue and green organic light-emitting materials as light sources. TFT's and a transparent conductive glass layer are used to control the light emissions of the red, blue and green organic light-emitting materials.
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Cheng Huang-Chung
Goang Dong-Yuan
Yu Zon-Zer
Allied Material Corp.
Parker Kenneth
LandOfFree
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