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Touch Screen

4 Wire Touch Screen Working Principle:
Touch screen has two-layer structure, i.e. the top layer, ITO film and the bottom layer, ITO glass or film. They are use PET film and glass as substrate material respectively, and then the ITO (Indium Tin Oxide) is coated on the film and glass surface. The non-conductive surface of the film is treated with hard coating to prevent scratch. The ITO film and ITO glass are separated by printed very small transparent insulation spacers (<1/1000 inch). When operating, each conductive layer is given uniformly a voltage by controller: usually X direction is on the ITO film, Y direction on the ITO glass or film. When screen is touched, both conductive layers of the top film and bottom glass make an electrical contact. The controller will get the X and Y coordination by calculating the voltage of the touching point.

Technical Specifications

Item

Project

Specification

Input

Finger, Gloved Finger, Stylus

Material

ITO Glass Thickness

0.7; 1.1; 1.8; 2.0; 3.0mm

ITO Film Thickness

0.188mm

Operation and storage temperature

Operation Temperature

-20C ~ 60C

Storage Temperature

-20C ~ 70C

Electrical

Operating Voltage

5V

Linearity

< 1.5%

X, Y Resistance

30 ~ 300(small various by the screen size)

Operation Current

5mA ~ 25mA

Insulation Impedance

>20M (DC25V)

Resolution

4096*4096

Mechanical

Operating Force

15-70g

Surface Hardness

3H

Life Expectance

>1,000,000

Optical

Light Transmission

>80%

Standard Size:

Part Number

Size

Dimension (mm)

Viewable Area

Active Area

LY -2.8 -4R

2.8"

70.000x55.000 mm / 2.76"x2.17"

59.600x46.100 mm /2.35"x1.81"

58.000x44.000 mm /2.28"x1.73"

LY -3.8 -4R

3.8"

89.400x69.400 mm / 3.52"x2.73"

80.900x60.980 mm / 3.19"x2.40"

79.900x59.980 mm / 3.15"x2.36"

LY -4.2 -4R

4.2"

94.800x69.600 mm / 3.73"x2.74"

88.800x61.600 mm / 3.50"x2.43"

86.800x59.600 mm / 3.42"x2.35"

LY -4.7 -4R

4.7"

110.74x089.41 mm / 4.36"x3.52"

101.09x76.960 mm / 3.98"x3.03"

98.09x73.9600 mm / 3.86"x2.91"

LY -5.8 -4R-1

5.8"

138.00x108.00 mm / 5.43"x4.25"

118.00x89.000 mm / 4.65"x3.50"

116.00x87.000 mm / 4.57"x3.43"

LY -5.8 -4R-2

5.8"

138.00x108.00 mm / 5.43"x4.25"

118.00x89.000 mm / 4.65"x3.50"

116.00x87.000 mm / 4.57"x3.43"

LY -5.8-4R-3

5.8"

141.00x104.70 mm / 5.56"x4.12"

122.00x93.850 mm / 4.80"x3.69"

115.17x86.370 mm / 4.53"x3.40"

LY -6.5 -4R

6.5"

156.00x120.00 mm / 6.14"x4.72"

136.00x100.00 mm / 5.35"x3.94"

134.000x98.00 mm / 5.28"x3.86"

LY -7.4 -4R

7.4"

171.90x127.40 mm / 6.77"x5.01"

148.90x112.40 mm / 5.86"x4.43"

145.90x109.40 mm / 5.74"x4.31"

LY -8.4 -4R-1

8.4"

208.00x152.00 mm / 8.19"x5.98"

176.00x133.00 mm / 6.93"x5.24"

171.00x128.00 mm / 6.73"x5.04"

LY -8.4 -4R-2

8.4"

188.98x141.73 mm / 7.44"x5.58"

173.98x131.32 mm / 6.85"x5.17"

172.21x129.54 mm / 6.78"x5.10"

LY -9.4 -4R

9.4"

234.00x174.00 mm / 9.21"x6.85"

211.00x158.00 mm / 8.31"x6.22"

196.00x148.00 mm / 7.72"x5.83"

LY -10.4 -4R

10.4"

237.00x180.00 mm / 9.33"x7.09"

216.20x163.40 mm / 8.51"x6.43"

212.00x159.40 mm / 8.35"x6.28"

LY -12.1 -4R

12.1"

271.00x205.00 mm /10.67"x8.07"

253.00x191.00 mm / 9.96"x7.52"

248.00x186.00 mm / 9.76"x7.32"

LY -15 -4R-1

15"

330.00x255.00 mm /13.00"x10.04"

310.00x235.00 mm / 12.20"x9.25"

303.00x227.00 mm / 11.93"x8.94"

LY -15 -4R-2

15"

320.00x243.00 mm / 12.60"x9.57"

300.00x228.00 mm / 11.81"x8.98"

285.00x216.00 mm / 11.22"x8.50"

LY -15 -4R-3

15"

311.00x254.00 mm /12.24"x10.00"

293.00x233.00 mm / 11.54"x9.17"

284.00x224.00 mm / 11.18"x8.82"

LY -17 -4R-1

17"

362.00x278.00 mm /14.25"x10.94"

340.00x260.00 mm / 13.39"x10.24"

320.00x238.00 mm / 12.60"x9.37"

LY -17 -4R-2

17"

366.00x294.50 mm /14.40"x11.60"

342.00x274.50 mm / 13.46"x10.81"

334.00x266.50 mm / 13.15"x10.49"

LY -17-4R-3

17"

358.50x296.50 mm /14.11"x11.68"

341.90x274.40 mm / 13.46"x10.80"

337.92x270.34 mm / 13.30"x10.64"

LY -17-4R-4

17"

360.50x290.00 mm /14.19"x11.41"

343.00x268.00 mm / 13.50"x10.55"

332.00x257.00 mm / 13.07"x10.12"

LY -18.1- 4R

18.1"

388.00x313.00 mm /15.28"x12.32"

363.00x291.00 mm / 14.29"x11.46"

357.00x285.00 mm / 10.06"x11.22"

LY -19- 4R

19"

395.00x300.00 mm /15.56"x11.81"

375.00x284.60 mm / 14.76"x11.20"

360.00x269.60 mm / 14.17"x10.61"

LY -21- 4R

21"

438.00x331.00 mm /17.24"x13.03"

416.60x315.00 mm / 16.40"x12.40"

402.60x301.60 mm / 15.85"x11.87"

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Tel: 0086 21 67871289 Fax: 0086 21 67871291
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