The working principle of an LCD (Liquid Crystal Display) TV screen involves the use of liquid crystals to produce an image.
Here are the key steps involved:
1.
Backlighting: The LCD screen has a backlight behind it to provide illumination.
This backlight is typically fluorescent or LED-based.
2.
Polarization: The light produced by the backlight is then passed through a polarizing filter.
This filter allows only light waves vibrating in a specific direction to pass through.
3.
Liquid Crystals: The polarized light passes through a layer of liquid crystals.
These liquid crystals are like a viscous fluid that can be controlled by applying an electric current.
When no current is applied, the liquid crystals are in their natural state, which twists the polarized light.
4.
Electric Current: The LCD screen has an array of thin-film transistors (TFTs) and electrodes behind it.
When a specific TFT is activated by applying an electric current, it allows the corresponding electrode to apply a voltage to the liquid crystal pixel above it.
5.
Pixel Control: The voltage applied to each pixel controls the orientation of the liquid crystals.
This manipulation changes the polarization of the light passing through the liquid crystals, either allowing or blocking it from passing through to the next layer.
6.
Color Filters: In full-color LCD screens, there are red, green, and blue color filters located in front of each pixel.
By controlling the voltage applied to each pixel, the amount of red, green, and blue light passing through is adjusted to create a desired color.
7.
Viewing Angle Control: Additional layers, such as diffusers and waveplates, are placed in front of the liquid crystals to control the viewing angle and enhance the image quality when viewing from different angles.
8.
Image Formation: As the polarized light passes through the liquid crystals, voltage-controlled pixels determine the amount of light transmitted.
By controlling the orientation of these pixels, various shades of color and brightness are produced, forming the image on the screen.
9.
Refresh Rate: The LCD screen repeatedly applies electric currents to the liquid crystals to refresh the image on the screen.
The refresh rate determines how quickly the image is updated, typically measured in Hertz (Hz).
Overall, the working of an LCD TV screen relies on the manipulation of liquid crystals through electric currents and various layers to create and display images in vibrant colors and detail.
VGH stands for Vertical Gate High.
It is a voltage used in liquid crystal displays (LCDs) to control the horizontal position of the liquid crystal molecules.
VGH positive 24V to 29V as per panel size
The exact voltage needed for VGH depends on the specific LCD display technology and manufacturer
VGL is the abbreviation for Gate-to-Source Voltage Low, Negative Voltage
which refers to the voltage applied to the gate terminal of a field-effect transistor (FET) to control the flow of current between the source and drain terminals.
It is commonly used in the context of FET amplifier circuits and is typically specified as a range of values, such as -5v to -11v
COF DATA Voltages Line PDF
AST21811A-A212A
NT39548H-5801A
RM76320FB-61A
RM76150FA-034
NT39538H-1272A
NT39538H-1272B
ILI5271M2AA1
RM76A30FA-906
SDD3293U
RM76370FA-80A
1)RM76320FB-61A
2)NT39567H-C5251A
3)NT39538H-C1272A
4)RM76370FC-80K
5)NT39565H-C5263A
6)NT39563H-C6502A
7)RM76311FC-805
8)RM76153FJ-OAI
9)NT61302H-C5290A
10)RM76A30FA-906
11)NT61228H-C6809A
12)NT39538H-C1298A
13)S0327B2-2L
14)NT61227H-C12I7B
15)8656-MCY61
16)8658-BCBJV
17)8656-MCY45B
18)NT61237H-C6523A/A
19)8656-MC607
20)S6CG242-51U
21)NT39562H-C12G9A
22)RM76H30FA-L04
23)8697-BCYA7
24)8698-CC560
25)RM76360FA-808
26)RM76190FA-OAO
27)NT39567H-C5284A
28)NT39538H-C1295A
29)NT39565H-C5253A
30)5253-ACBPQ
31)5253-BCBR3
32)5276-ACBR6
33)8656-MCY61
34)8651-ACBD7
35)8656-MCY40
36)8656-HC502
37)NT39538H-1260A
38)NT39530H-C5204A
39)RM76112FD-032
40)8656-F
41)SSD3272-3U2R4
42)RM76151FH-061
43)NT39538H-C12B9C
44)MT3807VC
45)D10C30G0023-CFOC1SSR
46)SW8003K
47)NT39567H-C5251B
49)NT61203H-C5604A
50)NV1047FHA(L)
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