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Introducing Richtek AMOLED solutions
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AMOLED (Active Matrix Organic Light Emitting Diode) have grown in
popularity for a wide range of applications, such as mobile phones,
wearable devices, medical applications, etc. |
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AMOLED displays have several advantages |
- Ultra thin
- Lightweight
- High contrast ratio
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- Vivid colors
- Very wide viewing angle
- Lower power consumption
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This is due to the different construction of AMOLED. Unlike
TFT-LCD panels, AMOLED panels don’t require additional LED
backlight units. AMOLED consist of a thin layer of organic
polymers that light up when current passes through. Therefore
AMOLED screen can be very thin and can be made in flexible
shapes.
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TFT-LCD screens need backlighting over the complete screen area,
whereas in AMOLED each pixel can be illuminated individually via
row (SCAN line) and column (DATA line). Pixels can be completely
switched off, allowing deep black for better contrast ratio and
most importantly saving power to extend battery life.
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Powering AMOLED panels needs special care |
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AMOLED panel drive is extremely sensitive to noise, and requires
special designed power ICs to provide very precise and noise free
voltages. Richtek has launched a series of integrated AMOLED power
IC solutions which provide fixed positive (Vpos) and dynamic negative
(Vneg) supply rails for the OLED power and AVDD voltage for Driver
power for several portable display applications. |
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| RT4723 |
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Dual output AMOLED Power IC with integrated boost converter
for Vpos and charge pump for Vneg in small CSP-15B 1.39x2.07
package, ideal for 1’’ to 2’’ panels in battery-powered wearable/portable
applications. Extremely small PCB footprint, and better light
load efficiency compared to competitor solutions.
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