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About OLED -1
■What is OLED?
OLED (Organic Light Emitting Diode)
Using an organic compound in the luminescent material, it is a kind of light-emitting element using a
phenomenon called "Organic EL (organic electroluminescence)".
The OLED is deposited organic materials to electrodes formed on a glass substrate, has a sandwiched
structure with the electrodes, it is able to control the intensity with the current flow from the electrode.
Compared to the LCD, the advantages are,
① Contrast improvement by self-luminous
② Lower power consumption
③ Excellent Response speed
■Panel structure
Slim & light-weight without backlight
(OLED)
Need No
Backlight
Color Filter
TFT Cell
White EL
Pixel structure
(LCD)
■Light-emitting theory of OLED
DATA
Data Voltage
Scanning line
TFT
Each voltage supplied to "data line" and the
"power line" makes TFT "ON", the current flows
to the OLED device and it emit light. Brightness
of the device is controlled by the current value.
OLED
POWER
Drain Current
(Id)
OLED device
62
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