The document outlines the design of a user interface for a digital photo frame, emphasizing interaction through dual thumbs. It highlights benefits such as an unobtrusive view and clean design, along with features like a rotating dial and a tree structure for navigation. Examples of navigating through settings and albums are provided to illustrate the interface's functionality.

1. Two Thumbs User Interface
For Digital Photo Frame
Rajesh Lal

2. Two Thumbs User Interface Design
Screen
preview
The User Interface

3. Two Thumbs User Interface Design
Why: A Photo frame is handled with two hands with two free thumbs
Default View with Two thumbs Interaction in a touch screen interface

4. Two Thumbs User Interface Design
Benefits
1. Unobtrusive View
2. Best suited for Two thumbs
interaction
3. A Unique and Easy way to
browse options in a photo frame
4. Clean and Elegant design

5. Two Thumbs User Interface Design
FEATURES
1. Rotating Dial interface which can
accommodate up to 8 items
in a category
2. A Unique Tree
a) Each Left round button is a root
b) Multiple buttons in the right are the
branch of the selected root
c) Left and Right triangle (Arrow) to go
up and down in the tree

6. Two Thumbs User Interface Design
1 2a
2 2b
Screen
preview
3 2c
4 2d
2 is selected which shows branches for 2 in the right
If 2 is settings 2a = albums, 2b=clock, 2c= calendar, etc
If 2 is an Album 2a = first picture in the album, and so on

7. Two Thumbs User Interface Design
EXAMPLE TREE
• Root = Settings
• Albums
• Album1
1 2 • Picture1
• Picture2
• Picture3
• Album2
• …
• Wi-Fi
1 = Left Arrow goes Up in • Wi-Fi 1
the Tree • Wi-Fi 2
• Clock
2 = Right Arrow goes • Hour
Down in the Tree • Minute
• Seconds

8. Two Thumbs User Interface Design
Grouped Interface for left thumb ONLY interaction

9. Two Thumbs User Interface Design
Grouped Interface for right thumb ONLY interaction

10. Two Thumbs User Interface Design
Grouped Interface for single finger interaction

11. Two Thumbs User Interface Design
Grouped Interface for single finger interaction

12. Thank You
Rajesh Lal
http://ABCofDesign.com