Display Driver Family

1
Display Driver Family
2
Holtek Display Driver Family
3
Display VFD Driver
3
4
Introduction of VFD

• VFD Vacuum Fluorescent Display
• 7 segment?Dot matrix?Graphic?Alphanumeric?Bi-plana
  r
• Advantages of the VFD
• Excellent readability under all ambient lighting
  conditions
• luminosity?brilliant?wide viewing angle
• Low voltage multiplex operation
• Long operation lift and high reliability
• Multi-color capability with color phosphors
  and/or color filters

5
Holtek VFD Driver series
6
Segment Type VFD Driver-Block Diagram
7
Segment Type VFD Driver - Advantage

• Multiple display modes
• Logic voltage 5V
• High-voltage output VDD-35V max.
• It consists of segment output lines, grid output
  lines, segment/grid output drive lines, LED
  output ports, a control circuit, a display
  memory, and a key scan circuit
• 4-bit general purpose input port
• Serial interface with MCU (CLK, CS, DI, DO)
• Available in Chip and QFP package

8
Segment Type VFD driver-Application

• Consumer products panel function control
• DVD player?VCD player?Calculator?
• Electronic Cash Register and Balance
• Clock and Timer
• Industrial measuring instrument panel function
  control
• Other similar application panel function control

9
Digital Clock VFD Driver-Block Diagram
10
Digital Clock VFD Driver -Features

• Applied for car clock of fluorescent character
  display tube
• Power supply to logic system2.8V -3.6V
• Power supply to VFD system4.0V-18V
• Suitable for 12-hour and 24 hour system clock
  application.
• Wide power supply range 4 to 18V
• 4.194304 MHz original oscillation
• 4 levels of brightness adjust
• 64HZ output
• Wide operating temperature-40?85 ?

11
HT16561 Application
12
HT16562 Application
13
Digital Clock VFD Driver - Application

• Automatic VFD Car Clock

14
Display LCD Driver
14
15
Holtek LCD Driver series
16
High pixel LCD Drive -Block diagram
17
High pixel LCD Driver - Advantage

• Specially designed for I/O type MCUs which are
  used to expand the display capability
• Four data bits interface
• Memory mapping and multi-function LCD controller
• Control TN-type or STN-type LCDs
• Only six lines (CS, WR, DB0DB3) are required for
  the interface between the host controller and the
  driver
• Buzzer and time base output
• Available in Chip and QFP package

18
High pixel LCD driver-Application

• Small size display application
• Education/Learning Appliance Display
• Communication Product Display
• Personal exercise equipment
• Consumer electronics
• Toy
• Games
• DSC
• MP3

19
Display LED Driver
20
Display Driver Road Map
LED Driver
HT1632
HT1622
LCD Driver
HT1621
HT1623
HT1626
HT1650
HT1670
HT1625
HT1647
HT1660
4x32
8x48
8x64
8x32
16x48
16x64
32x64
32x96
32x128
Display size
21
LED Driver Line-up
22
HT1632 Features

• Logic voltage2.4V 5.5V
• Multiple display
• (8 common 32 output bits and 16 commons
  24 output bits)
• Built-in display RAM
• (select 8 common 32 output bits for 64 x 4
  display RAM , select 16 common 24 output bits
  for 96 x 4 display RAM )
• The contents of the RAM are directly mapped to
  the contents of the driver. Data in the RAM can
  be accessed by commands.
• 16-level PWM brightness control
• Built-in 150KHz RC oscillator
• Serial interface with MCU
• (CSB, RDB, WRB, DATA)
• Data mode command mode instruction
• Cascade applications for user
• Select N-MOS open drain output driver and P-MOS
  open drain output driver for common pad
• 52-pin QFP package

23
HT1622 VS. HT1632
24
HT1632 Block Diagram
25
HT1632 Application (I)
Display Connect Example (32 outbits 8 commons)
26
HT1632 Application (II)
Display Connect Example (24 outbits 16 commons)
Note In this application, user should concern
the display performance base on display size and
driving capability.
27
HT1632 Application (III)

• Monitor for Motorized Treadmill
• Electronic Perpetual Calendar
• Electronic Dartboard