Liquid crystal display apparatus
View Patent ↗In an LCD apparatus ( 400 ) having simplified structure and improved luminance, a light supplying unit ( 100 ) supplies an LCD panel ( 280 ) with red light during a time corresponding to one-third of a frame, green light during the time and blue light during the time. A light reflective-transmissive unit is disposed between the light supplying unit ( 100 ) and the LCD panel assembly ( 200 ) to transmit the red light, the green light and the blue light and to reflect an external light from exterior of the LCD panel assembly ( 200 ). The LCD apparatus displays an image by means of white light as well as red light, green light and blue light, thereby improving luminance and simplifying structure.
1. An LCD apparatus comprising:
an LCD panel assembly having a plurality of pixels controlling an arrangement of liquid crystal so as to display a color image;
a light supplying unit having independent light sources corresponding to red light, green light and blue light, respectively, the independent light sources supplying the red light during a time corresponding to a first one-third of a frame, the green light during a second one-third of the frame and the blue light during a third one-third of the frame;
a light reflective-transmissive unit disposed between the light supplying unit and the LCD panel assembly so as to transmit the red light, the green light and the blue light and to reflect a light externally provided to the LCD panel assembly in order to improve luminance of the color image; and
a light guide plate including side surfaces facing the light sources, a light-exiting surface facing the light reflective-transmissive unit,
wherein the light guide plate has a plurality of receiving recesses to partially receive the light sources.
2. The LCD apparatus of claim l, wherein the pixels comprise a transparent electrode transmitting the red light, the green light and the blue light.
3. The LCD apparatus of claim 1 , wherein the light sources comprise a red light supplying unit emitting the red light, a green light supplying unit emitting the green light and a blue light supplying unit emitting the blue light.
4. The LCD apparatus of claim 3 , wherein each of the red light supplying unit, the green light supplying unit and the blue light supplying unit comprises a light I emitting diode.
5. The LCD apparatus of claim 3 , wherein the red light supplying unit, the green light supplying unit and the blue light supplying unit are alternately disposed.
6. The LCD apparatus of claim 1 , wherein the light reflective-transmissive unit comprises a light reflective-transmissive film including a plurality of first layers and a plurality of second layers, the first and second layers have different refractive indexes from each other, and the first and second layers are alternately stacked.
7. The LCD apparatus of claim 6 , wherein the light reflective-transmissive unit is disposed at a position facing the light supplying unit of the LCD panel assembly.
8. The LCD apparatus of claim 1 , wherein the pixels comprise; a transparent electrode transmitting the red light, the green light and the blue light; and a reflective electrode disposed on the transparent electrode, the reflective electrode having a contact hole through which a portion of the transparent electrode is exposed.
9. The LCD apparatus of claim 1 , wherein the red light, the green light and the blue light are successively outputted from the light supplying unit during each of the first, second, and third one-thirds of the frame, respectively.