WD8752 Controller IC GFF Touch Panel 21.5 Inch Multi Touch Panel

Master Touch 21.5 Inch Multi Touch WD8752 Controller IC GFF Touch Panel

1. Product Description

Master Touch 21.5 inch GFF projected capacitive touch screen panel, via a process of sputtering an ITO pattern on a film substrate to make a film-sensor, perceive touch accurately through capacitance coupling.

Capacitive touch panel works through body's current induction.When finger is on or close to touch panel surface,due to body electric field, the user and touch panel surface forms one coupling capacitance. For high frequency current, capacitance is direct conductor, then fingers suck a small current from the contact point, through amplifying and accurately calculating this current signal, the controller works out the touch point position.

The advantages of 21.5 inch GFF are low capital cost, suitable for small quantity batch production, and light structure.

2. Module Specification

2.1 Basic Information

Item	Specification	Unit
Screen Size	21.5	Inch
Viewing Area	477.64(L)×269.11(W)	mm
Cover lens O.D	497.42(L)×297.5(W)	mm

 

2.3 Optical Features

 

Item		Specification
Transparency	Viewing Area	≧85%

 

3. Sensor Specification

 

Item			Specification	Unit
Stacked structure	Cover		1.8	mm
	Top OCA		0.125	mm
	Film Sensor		0.125	mm
	Bottom OCA		0.125	mm
	Film Sensor		0.125	mm
Sensor Dimension	OD Size	X	496.42	mm
		Y	289.41	mm

 

4. Electrical Specification

 

Item	Type	Value	Unit	Remarks
Operating Temperature	-	-20 ~ +80	℃	Humidity 20%~85% RH
Storage Temperature	-	-30 ~ +80	℃	Humidity 20%~85% RH
ESD Requirement	ESD air requirement	±8	KV	Air
	ESD contact requirement	±6	KV	Touch

 

5. Test

 

Item		Specification	Result
Cover lens	Ball Drop	200g ± 2g 35cm	One drop test on each of the 5 selected points, No damage
	Hardness	Pencil: 6H Pressure: 1N/45°	Hardness ≧ 6H
	Warpage	By Gauge	Warpage 0.1% ≦ Length *
FPC/COF	Bending	Bending range 0-180° 30times Electrical Function ok	-

 

6. Drawing

 

 

7. Details

 

 

8. Cosmetic Inspection

 

The following standard only applies to the visual areas. If the TP function is good, the non-visual appearance may negotiate to relax the standard. W=Width L=length D=Diameter GT=Glass thickness. If soft cloth which dips in alcohol can wipe besmirch, it does not apply to this appearance standards.

Inspection methods and conditions:

1)Inspection environment: Temperature:20-22 ℃; Humidity: 65 + 10% RH;

2)Inspector qualifications: The appearance of product must be inspect by a good eyesight inspector.

 

3) Inspection methods: The distance between inspector and product should be 30±2cm and putting a lamp 12 to 20 watts of cold white fluorescent lamp in the observation station of product.

 

 

9. FAQ