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Resistive Touch Panels

Principle of resistive touch panels Structure

Film/glass type. The upper electrode consists of a transparent film with "ITO" formed on it and the lower electrode consists of a transparent glass plate with "ITO" formed on it. Input with a pen or finger will make the upper electrode flex and make electrical contact to the lower electrode and then current flows.ITO : Indium tin oxide

Coordinates are read by the controller.The point where input has been made will be read by application of voltage to the Y side and by reading the voltage of the X side. Then, voltage is to be applied to the X side before the voltage of the Y side is read at the X side. The voltage value will be output by the controller as a converted coordinate value.

Our touch panels have the four defined areas :

A. Insulated area: Electrodes and insulated pat ter ns are laid. Silver printing and adhesive substances are applied.

B. View area: Transparent area.

SMK has a broad repertoire of resistive touch panels to suit all our clients’ needs. As well as our standard specification models, we have heat-resistant models suitable for outdoor use, high transparency models that boast excellent visibility, models that allow for multi-touch input, and more. Whatever your requirements, we are confident that we have the touch panel you require.

Definition of touch panel areas Touch panel cross-section

C. Active area : Actual touch panel operation per­formance assurance area.

Active area of LCD should be set inside this area.D. Dead area : The area between the insulated area

(A) and active area (C). Structurally, the endurance against drawing operations are weak in the dead area; and therefore, please set the input area inside the active area.

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Resistive Touch Panels

Technical Term

Input reading errors may occur, due to aging of ITO or a silver pattern.

4­wire 8­wire

4 wire type: Adjustment is required by use of exclusive software.8 wire type: A controller supervises periodically the voltage value from the main electrode and auxiliary electrode, and revise it automatically

This is an important element to determine the optical characteristics of touch panels. The transparency of touch panels differs from degree of transparency of the film materials, glass materials and optical film to be used. Widely available film/glass touch panels have a transparency rate of 75% to 88%.

Ratio of how much straight drawn lines on a touch panel is seen as curved on display.Curve ratio (mm) / Active area (mm) x100%

Rainbow­like patterns that appear on touch panel, due to interference, when the top and bottom electrodes are too close or a proper fixed distance is not maintained.

Rate of diffused light to the total light transmitrance. The greater this value is, the lower the influence of reflection will be. However, touch panels are often seen blurred.

Panel surfaces (input surfaces) can be finished in a glare (clear) or anti­glare type.

A fine matte finish process is applied on the operation surface to prevent the appearance of distracting surface smudges.

The lower electrode glass plate can be replaced with chemically tempered glass. The use of tempered glass enables thinner and lighter touch panel without sacrificing the durability of products. A 10.4" panel will be 67% lighter and 71% thinner than standard glass types.

This type uses a highly reliable heat resistant materials for a tough operating environment such as an automotive environment.

Transparency

Linearity

Newton ring

Haze

Surface treatment

Tempered glass

High heat resistant

4-wire and 8-wire systems

Anti-smudge

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Film /glass structure

Resistive Touch Panels

These touch panels are constructed using both film and glass. Film is used for the top electrodes, and glass is used for the bottom electrodes. Not only can these touch panels be operated using a fingertip or a pen, they also allow for user input when gloves are being worn.In addition to standard single-point input models, we are also able to provide multi-point input types.

Standard type

Specification

Voltage (V)

Size (inch)

Operating temp. range ( )

Storage temp. range ( )

Input method

Operation force (N)

Linearity (%)

Transparency (%)

Reflectance (%)

Haze (%)

DC 5

2 to 15

−20 to 70

−30 to 80

Pen or finger

0.1 to 1.0

±1.5

75 to 88

8 to 23

1 to 12

DC 5

2 to 8

−30 to 85

−40 to 95

Pen or finger

0.1 to 1.0

±1.5

76 to 86

10 to 23

1 to 12

DC 5

2.5 to 7.0

−20 to 70

−30 to 80

Pen or finger

0.1 to 1.5

±1.5 to 3.0

86 max.

10 to 23

0 to 12

Item

l Figures shown are typical. Please contact our sales personnel for specifications.

Standard High heat-resistant Decoration

l High transparency, tempered glass and anti-smudge conform to the standard specification.

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l Various transparency levels are available by combination of the film or glass.

l �High transparency, anti-smudge, tempered glass, high heat-resistant types are optionally available.

Features

Structure

Film /glass touch panelsl Standard specification / high transparency / tempered glass / anti-smudge /

high heat-resistant

l�A fully flat finishing that is bezel-free is realized. l�Drip and Dust proof is possible from the fully flat structure. l�The decoration sheet of the surface can be custom made.

Features

Structure

l Decoration type

Film / glass structure

The decoration sheet is fitted on the surface of the touch panel. This provides a response to the various design demands of users.

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Lineup of standard film / glass type

Part number

External dim. (mm)

Transparent area dim. (mm)

Active area dim. (mm)

Connector tail length (mm)

Glass thickness (mm)

Touch panel thickness (mm)

Transparency (%)

Surface treatment

Number of Pins

Upper contact

Lower contact

Min. quantity

Pb free

Item

Standard lineup of controllers

Part number

Supplied voltage (V)

Electrical resolution

Recommendedconnector number

Interface

Communication system/rate

Command control

Corresponding driver

Sampling rate

Package configuration

Pb free

Resistive Touch PanelsSMK provides standard touch panels of various sizes from 5.6 inches to 15 inches. All standard touch panels use SMK tooling mold, therefore customers are able to save development expenses. A small lot production is also available.

5.6 inch 8.4 inch

Serial type USB type

NTX0101-6101F

132.5×104.7

122.0×93.85

116.0×87.0

50

1.1

1.4

79

non-glare

4

CFP0504-0301F

CFP1504-0401F

100

Pb free

NTX0101-1101F

188.98×141.73

173.98×131.32

172.21×129.54

50

1.1

1.4

79

non-glare

4

CFP0504-0301F

CFP1504-0401F

100

Pb free

NZX0100-2401F

3.0~5.25

10bit (1024×1024)

USB 2.0(Full-speed)12Mbps

plug and play (PNP)compatible

125S/s max.

64p T-QFP(12×12mm)

Windows®7/8.1(only 32bit OS is available)

Pb free

NZX0100-2901F

2.7~5.5

10bit (1024×1024)

9600bps

plug and play (PNP)compatible

133S/s (typ)

32p QFP(9×9mm)

Windows®7/8.1(only 32bit OS is available)

Pb free

NZX0100-2505F

3.0~5.25

10bit (1024×1024)12bit (4096×4096)

USB 2.0(Full-speed)12Mbps

plug and play (PNP)compatible

125S/s max.

48p QFN(7×7mm)

Windows®7/8.1(only 32bit OS is available)

Pb free

USB type

50

70

50

1

1

1

4

8

4

Polyimide

Polyimide

Polyimide High heat-resistant

Length(L)

Lineup of connector tails

5

9

5

TL-1

TL-2

TL-3

Length (mm) Pitch (mm) Number of pins Material OthersWidth (mm)Part No.

Width(W)

15

PC

Serial

Evaluation kit Touch panel operation is easily checked by simply connecting this kit to your PC.Type

USB

Standard touch panelControl board

(NZX0100-2202F mounted)

RS232C cableAC adapterTouch panel cableDriver software

Windows® 7/8.1 (only 32bit OS is available)

Standard touch panelControl board

(NZX0100-2401F /NZX0100-2505F mounted)

USB cableTouch panel cableDriver software

Windows® 7/8.1 (only 32bit OS is available)

10.4 inch 12.1 inch 15 inch

PC

PC

Serial cable

PowerSwitch

AC adapter

Touch panel cable

Touch panel

Touch panel cable

Touch panel

USB cable

Composition Wiring diagram

NTX0101-6251F

229.8×172.7

215.2×162.4

211.2×158.4

70

1.1

1.4

79

non-glare

8

CFP0508-0301F

CFP1508-0401F

100

Pb free

NTX0101-6351F

264.6×198.8

250.0×188.5

246.0×184.5

70

1.1

1.4

79

non-glare

8

CFP0508-0301F

CFP1508-0401F

100

Pb free

NTX0101-6401F

332.0×255.0

310.5×235.5

306.1×230.1

70

1.8

2.1

79

non-glare

8

CFP0508-0301F

CFP1508-0401F

100

Pb free

16

Transparency (%)

Reflectance (%)

82 min.

16 max.

70 to 73

6 to 11

Item

75

1

74

6.5

Technical terms

Specification

Voltage (V)

Size (inch)

Operating temp. range (°C)

Storage temp. range (°C)

Input method

Operation force (N)

Linearity (%)

Transparency (%)

Reflectance (%)

Haze (%)

Item

DC 5

2 to 12

−30 to 85

−40 to 95

Finger

0.2 to 2.0

±3.0

70 to 82

1 to 16

7 to 12

75

9

l Figures shown are typical. Please contact our sales personnel for specifications.

Coating of the rebound ace court dispersion layer on the film surface, to block reflection so it does not go into eyes.Anti-glare (AG)

Anti-reflection (AR)

Polarizer

Retardation

Linear polarization

Circular polarization

Circular polarization

Apply many layers of dielectric thin films on the surface of hard coated film to prevent reflection.

A film which intercepts the light from various direction and only pass through the light from the fixed direction. Placing a polarizer on the touch panel decreases internal reflection.

Linear polarization is the light that passed through polarizer.

Two compounded linear polarization of 90 degrees shifted phase and an oscillating. The reflection can be decreased due to the rotated outgoing light angle pass through a circular polarizer.

Retardation plate converts linear polarization into circular polarization.

Resistive Touch Panels

Glass / glass structureA low reflection touch panel with the use of a thin glass plate for the upper electrode realizes a high heat-resistant. Thus, a tough operating temperature range for car navigation systems and outdoor use products can be met.

Specification

AG Linear polarized Circular polarized Super low reflectance Polarized sunglasscompliant

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Glass / glass touch panel l Linear polarized type, reflectance :9%

Structure Principle

l Circular polarized type, reflectance :6.5%Structure Principle

l Super low reflection type, reflectance :1%Structure Principle

l Polarized sunglasses compliant type, reflectance :6 to 11%Structure

Principle

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Mechanism

FFB touch panel circuit —Block diagram—

Force Feedback (FFB) Touch Panels

Allows for haptic feedback feel from touch panel.

Touch panel vibrates itselfby given vibration signals

Features 1. Realization of haptic feedback when inputting on a touch panel, by applying

"self-vibration technology".2. Optionally customizable vibration patterns for varied touch feeling.3. Quickly provide user with expected touch feelings in a short time.4. Dedicated controller IC available. (Interface : Serial)

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Specification of touch panels

Size (inch)

Operating temp. range ( )

Storage temp. range ( )

Transparency (%)

Operation force (N)

Amplitude (μm)

Supplied voltage (V)

Item

4.0 to 15.0

-20 to 70

-30 to 80

70 to 88

0.1 to 1.5

10 min.(for reference)

DC 5

Supply methods

4.0 to 10.0

-30 to 85

-40 to 95

70 to 82

0.1 to 2.0

10 min.(for reference)

DC 5

Specification of controller IC

Size (inch)

Supplied voltage (V)

Supplied voltage (V ) while driving FFB

Electricity cosumption (mA) while driving FFB

Standly current (μA)

Interface

IC size (mm)

4.0 to 15.0

DC 5

200~400 peak to peak AC

300

30

Serial(UART)

6.5×6.5

Force feedback touch panel

Controller IC

Circuit module

+ or

Film / glass Glass / glass

Item Standard