This presentation given by Jerry Wang, VIA Embedded Project Manager, provides a rundown of the most popular display devices used for embedded applications, then moves on to explain the fundamentals behind the display integration process including preparing the frame data, programming the GPU to communicate with a variety display interfaces, and finally optimizing the output display through debugging.

1. Selection and Integration of
Embedded Display Devices

2. Display System Revealed
LCD Screen Implementation
Touch Screen Support
VIA Display Advantages

3. Display System Revealed
Evolution of Information Delivery
Display System
Resolution

4. Evolution of Information Delivery
Primitive Times

5. Evolution of Information Delivery
The Age of Electronics

6. Display Screen
Definition of Display System
Electronic system providing visual information
Application Area of Display System
Status monitoring and objective display
Non-visible light or indirect visual image display
HMI

7. Display Content Video Card Display Interface Display Device
Display System
System Structure

8. On Screen
(1920x1080x32bit)
Off Screen
CPU
2D
engine
3D
engine
Video
engine
Video memory
Display
engine DAC
RGB
TV
Encoder
TMDS
transmitter
LVDS
transmitter
HDMI
transmitter
DVO
Display System
Graphics Device

9. Display System
Analog
Digital
Display Device
TV
CRT
LCD
DVI
HDMI

10. Display Interface
HDMI
LVDS
MHL
A/V
Display System

11. Concept
Display device
Display content
Display shows the number of pixels
Functionality 4K display device
must be sharper
than ordinary
display devices?
VESA and CEA Standards
Resolution

12. LCD Foundation
Screen Lighting
Debugging
Display System Secrets
LCD Screen Implementation

13. LCD Foundation
1. TTL Signal
2. Parallel Transmission
3. High power
consumption & high EMI
4. Low Resolution
5. Small Screen
6. Low Cost
TTL
VS
1. Low voltage differential
signaling
2. Serial Transmission
3. Low power consumption
& low EMI
4. High Resolution
5. Support 50 inch screen
6. High Cost
LVDS

14. LCD Product Status
Interface circuit complexity
Driver implementation
Interface type
No standard hardware pin
LCD Screen Instructions
Data line easily damaged
Vendor support limited
Screen Lighting

15. LCD Screen Process
Determine screen backlighting and normal voltage
Determine the timing parameters and add drivers
VESA standard: CVT, GTF
http://www.vesa.org/vesa-standards/standards-summaries/
VESA
Irregular screen
Screen Lighting

16. Define Interface parameters and configure the interface or
modify drivers
 Channel
 Data Input Format
Screen Lighting

17. Debug Object
Timing
Driver code debugging
Interface circuit configuration
Debug Mode
Debugging tools
Device Debugging

18. Equipment Debugging
Mismatch of clock pole or
data format
Abnormal Electric Power
Skew
Configuration
Error

19. Applications
Display Screen Interface
LCD Screen implementation
Touch Screen Support
Hardware Architecture

20. Touch Screen Module
Sensor Touch Control Chip
Hardware Architecture

21. Communication Interface
I2C
 Mainstream Interface, wide range of applications
 Need to design connect circuits, porting is not convenient
USB
 Easy to connect, easy to port, supports large sized panels
 Occupies one USB Interface
SPI/UART
 Rarely used, need to design connection circuit, porting is
not convenient
Hardware Architecture

22. ZCC2901 Touch Screen Example Case
Part I
Case Environment
Application Environment
 Platform
 System
Touch Screen
 Controller
 Bus Interface

23.  SPI and 8 GPIO
 3 I2C and 2 COM
 S-video and miniPCIe
 10cm x 7.2cm compact Pico-ITX
 HDMI and Dual LVDS
 MicroSD slot and GLAN
 3 USB ports
Why VIA VAB-1000? -> Ultra compact with rich I/O
ZCC2901 Touch Screen Example Case
Part II

24. Hardware Connection
ZCC2901 Touch Screen Example Case
Part III

25. Driver Porting
I2C and GPIO driver
ZCC2901 Touch Screen Example Case
Part IV

26. Screen calibration
Touch key processing
ZCC2901 Touch Screen Example Case
Part V

27. Android Add Event
Android customization key
Debugging and Testing
ZCC2901 Touch Screen Example Case
Part VI

28. Display System Secrets
LCD Screen Implementation
Touch Screen Support
VIA Display Advantages

29. Android Application Development

30. Android Application Development

31. VIA Display Solutions

32. © 2014 VIA Technologies, Inc All Rights Reserved.
• VIA reserves the right to make changes in its products without notice in order to improve design or performance characteristics.
• This publication neither states nor implies any representations or warranties of any kind, including but not limited to any implied warranty of merchantability or fitness for a particular
purpose. No license, express or implied, to any intellectual property rights is granted by this document.
• VIA makes no representations or warranties with respect to the accuracy or completeness of the contents of this publication or the information contained herein, and reserves the right
to make changes at any time, without notice. VIA disclaims responsibility for any consequences resulting from the use of the information included herein.
• VIA C7®, VIA C7®-D, VIA C7®-M, and VIA Eden® are trademarks of VIA Technologies, Inc.