JVC LT-42WX70/APT Service Manual page 9

2.4 TECHNICAL INFORMATION
2.4.1 LCD PANEL
This unit uses the flat type panel LCD (Liquid Crystal Display)
panel that occupies as little space as possible, instead of the
conventional CRT (Cathode Ray Tube), as a display unit.
Since the unit has the two polarizing filter that are at right angles
to each other, the unit adopts "normally black" mode, where light
does not pass through the polarizing filter and the screen is black
when no voltage is applied to the liquid crystals.
2.4.1.1 SPECIFICATIONS
The following table shows the specifications of this unit.
Item
Diagonal: 105 cm (H: 93.0 cm × V: 52.3 cm)
Screen Size
Aspect ratio 16 : 9
Drive device / system a-Si-TFT active matrix system
Horizontally 1920 × Vertically 1080
Number of Pixels
Pixel pitch (pixel size) H: 0.4845 mm, V: 0.4845 mm
Displayed colour 1073.7M colours
Brightness 450 cd/m
Contrast ratio 4000 : 1
Response time (G to G) 6.5 ms
View angle Horizontally: 178°, Vertically: 178°
Surface polarizer Anti-Glare type Low reflective coat
Colour filter Vertical stripe
Backlight Cold cathode fluorescent lamp
Panel interface system LVDS (Low Voltage Differential Signaling)
Specifications
2
2.4.1.2 PIXEL FAULT
There are three pixel faults - bright fault, dark fault and flicker
fault - that are respectively defined as follows.
BRIGHT FAULT
In this pixel fault, a cell that should not light originally is lighting
on and off.
For checking this pixel fault, input ALL BLACK SCREEN and
find out the cell that is lighting on and off.
DARK FAULT
In this pixel fault, a cell that should light originally is not lighting
or lighting with the brightness twice as brighter as originally
lighting.
For checking this pixel fault, input 100% of each R/G/B color
and find out the cell that is not lighting.
FLICKER FAULT
In the pixel fault, a cell that should light originally or not light
originally is flashing on and off.
For checking this pixel fault, input ALL BLACK SCREEN signal
or 100% of each RGB color and find out the cell that is flashing
on and off.
(No.YA700<Rev.001>)1-9