Palette Driver

Home > Top Story - ST7045/ST7049

ST7045/ST7049 - Colorizing TN LCD Driver

Introduction»

A new era of the colorizing TN LCD is coming silently. The Sitronix’s Palette Driver (ST7045/ ST7049) integrate the color sequential concept into the LCD diver ICs. The Palette Driver displays can show color images by combining a black-and-white TN panel and tricolor back-lighting. We divide the color picture into three R, G, B sub-picture, and show the sub-picture in order with R, G, B back-light. Then sub-picture will be made a group to a color picture in the human brain. So the Palette Driver displays don’t need the color filter, and the displays can reduce material cost, production cost and power consumption. So the Palette Driver display has the advantage in low power consumption and low cost demand. Create a good and inexpensive new-type colored display.
The advantage of Palette Driver display for ST7045/ ST7049 ICs：
1) Low cost
2) High transmission ratio
3) Low power consumption
4) Good display performance
5) Low development tooling charge

Download

Product DM (pdf)

Related Information

TN LCD Driver

Features

The ST7045 & ST7049 are the palette driver & controller LSI for graphic dot-matrix liquid crystal display systems. The ST7045 contains 320 segment / 1 common driver circuits, the ST7049 contains 320 segment / 4 common driver circuits. The chips are connected directly to a microprocessor, accepts 4-line/3-line serial peripheral interface (SPI) and 8080 parallel interface, display data can stores in an on-chip display data RAM. They perform display data RAM read/write operation with no external operating clock to minimize power consumption. In addition, They also can produce LEDR, LEDG, LEDB control signals to generator RGB LED backlight system if necessary.

System Block Diagram

Enlarge

Product Specs

	Features
Driver Output Circuits	- 320 segment / 1 common outputs for ST7045 - 320 segment / 4 common outputs for ST7049
On-chip Display Data Ram	- Capacity: 1X320x3=960 bits for ST7045 - Capacity: 4X320x3=3840 bits for ST7049
Microprocessor Interface	- 8/4-bit bi-directional parallel interface with 8080-series - 3-line SPI (9-bits) , 4-line(8bits) serial peripheral interface
On-chip Low Power Analog Circuit	- Generation of LCD supply voltage (externally V0IN voltage supply is possible)
Generation of intermediate LCD bias voltages	- Oscillator requires no external components - Voltage converter (x2~x6) - Voltage regulator - Voltage follower
With External /RST (reset) pin
Logic Supply Voltage Range	- VDDI (VDD, VDD1)-VSS：2.4V~3.3V - VDDA (VDD2, VDD3)-VSS：2.4V~3.3V
LCD Driving Voltage Range (VOP=V0-VSS)	- 3 V to 18V
With LED Control (LEDR, LEDG, LEDB) pins
Temperature Range	-30 ~85℃
Package Type:	COG