Sharing Projectors

Myungcheol Doo & Andy Wu

Intro & Motivation

• Increase efficiency of group meeting– Reduce delay in switching a VGA cable

• Increase the rate of projector usage– Mobile devices– Laptop computers

Related Product

http://www.planex.net/product/wireless/gw-ap54pr.htm

Proposed Solution

Server ClientsProjector

VGA Cable TCP / IP

Proposed Solution Screen Shots

Client Server

User Evaluation

Control Group: switch a VGA cable

Experimental group: use software

Task: find 12 photos for making a photo calendar Control Group

Experimental Group

User Evaluation (continued)

Histogram of using cable

0

1

2

3

4

5

6

7

0-3 3-6 6-9 9-12 12-15 15-18 18-21 21-24 24-27 27-30 30-33 33-36

Time (sec)

# o

f su

bje

cts

10 minutes Introduction

20 minutes Condition 1 Observation

5 minutes Rest time

20 minutes Condition 2 Observation

5 minutes Questionnaire Questionnaire

20 minutes Interview Focus group

16 subjects

avg: 19.08

sd: 7.83

median: 14.71

User Feedback

Advantages Disadvantages

Cable •I know who is using

•I can use extensive desktop

•Playing videos

•Plug/unplug cables

•Cabled color is wrong

•How to switch to the projector?

•I have to reboot my laptop??

•Plug and pray

This Software

•Just one click

•Very fast

•Efficient

•Distance meeting?

•Any problem? just re-launch the software

•Security

•Identity

•Software anyone can grab it

•Software delay

•Video may be problematic

•Privacy

Conclusions

• Users like our software (avg: 1.58, sd: 0.42) • Our software is good for:

– Mobile devices– Multiple computer meeting

• But!! Here are the problems:– Privacy

• Extended desktop• Maximize working windows

– Sharing screens vs sharing information• User scenario

– Identity

Future Work

User1