Technical Information; Lcd Panel; Specifications; Pixel Fault - JVC LT-32EX19/AT Service Manual

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
Maximum dimensions ( W × H × D ) 76.0 cm × 45.0 cm × 4.5 cm
Weight
Screen size
Aspect ratio
Drive device / system
Resolution
Pixel pitch (pixel size)
Displayed colour
Brightness
Contrast ratio
Response time (Tr)
View angle (Horizontally)
View angle (Vertically)
Surface polarizer
Colour filter
Backlight
Power supply voltage in LCD
Power supply voltage in inverter
Panel interface system
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 colour 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 colour and find out the cell that is flashing on
and off.
QLD0566-001
6.5 kg
Diagonal : 80.0 cm (H: 69.7 cm × V:39.2 cm)
16 : 9
a-Si-TFT active matrix system
Horizontally 1366 × Vertically 768 × RGB <W-XGA> 3147264 dots in total
Horizontally: 0.51075 mm, Vertically: 0.17025 mm
16777216 colours 256 colours for R G and B
2
450cd/m
2500 : 1
less than 6.5 ms
178°
178°
Anti-Glare type Low reflective coat
Vertical stripe
Cold cathode fluorescent lamp × 7(U-type)
12 V
24 V
LVDS (Low Voltage Differential Signaling)
Specifications
QLD0620-001
76.0 cm × 45.0 cm × 4.8 cm
5.7 kg
2
500cd/m
1200 : 1
less than 8 ms
Cold cathode fluorescent lamp × 12
(No.YA702<Rev.005>)1-11