Specifications

85
TFT-LCD panel, and the SLCD5 controller (SLCD5 controller will be discussed in
detail in a later section). To activate the LCD touch screen we can either use the
user‟s finger or a pen to input various states for our HVAC control system. On
the home screen of the LCD panel the user will be able to, among other things,
set the desired temperature and relative humidity for when the system is in
cooling mode, set the temperature and relative humidity for when the system is in
heating mode, view the current temperature and relative humidity inside the
building, view the current temperature and relative humidity outside the building,
and choose between several settings that range from maximum savings to
maximum comfort (specifies to the system the tolerance for temperature and
relative humidity variation from set points). The model number of the Evervision
screen we have chosen is VGG804805-6UFLWE. Each letter and number is a
descriptor of a part of the panel. The descriptors that are important to our
implementation of the design are outlined in Table 25.
LCD Type
LCD Model
Backlight Type
Backlight
Color
U: Transmissive/Positive
F: TFT
L: General LED
W: White
Table 25 Important descriptors of the Evervision 7” LCD panel from the
model number (Reprinting Permission Granted from Evervision)
The physical specifications of the LCD panel are what must meet the basic
requirements presented to us by the sponsors. Originally the sponsors informed
us they wanted something in the 7 to 8 inch range that was touch sensitive that
would be aesthetically pleasing (bright, colorful display). Again, since this is the
only portion of the system that a potential customer would interact with, the LCD
panel must be very attractive. The physical specifications for the Evervision 7”
LCD are shown in Table 26 below.
Item
Specifications
Unit
Size of Screen
7
inches
Active Area
152.4(H) x 91.44 (V)
millimeters
Dot Size
0.0635(H) x 0.1905(V)
millimeters
Pixel Configuration
RGB Vertical Stripe
-
Weight
215
grams
Display Mode
Transmissive Mode
Normally White TN Type
-
Display Format
800RGB(H)x480(V)
Dot
Surface Treatment
Anti-Glare and Hard Coating
(3H)
-
Outline Dimension
166.6(W)x107.0(H)x11.5(D)
millimeters
Viewing Direction
6 O‟clock
-
Table 26 Specifications for 7 inch Evervision LCD Panel