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EVE 3 3.5″

This datasheet gives detailed information about the Riverdi 3.5″ EVE3 displays. The displays come in different versions: with capacitive, resistive, or no touchscreen, and with our without a metal mounting frame.

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Rev.1.0
2018-10-22

ITEMCONTENTSUNIT
LCD TypeTFT/Transmissive/Normally white/
Size3.5Inch
Viewing Direction12:00 (without image inversion)O’ Clock
Gray Scale Inversion Direction6:00O’ Clock
Number of Dots320 x (RGB) × 240/
Driver ICBT81x/
Interface TypeSPI/QSPI/
Module Memory Size1 MB (BT81x) + 64 Mb (external flash)/
Brightnessno touch module540cd/m2
CTP module480
RTP module450
Color Depth262k/
Pixel ArrangementRGB Vertical Stripe/
Surface TreatmentAnti-glare / Clear (for CTP)/
Input Voltage3.3V

Note 1: RoHS, REACH SVHC compliant

Note 2: LCM weight tolerance: ± 5%.

1. Module classification information

RVT35AHBxWx00
1.2.3.4.5.6.7.8.9.10.
1.BRANDRV – Riverdi
2.PRODUCT TYPET – TFT Standard

F – TFT Custom

3.DISPLAY SIZE35 – 3.5”
4.MODEL SERIAL NO.A (A-Z)
5.RESOLUTIONH– 320×240 px
6.INTERFACEB – TFT + Controller BT81x
7.FRAMEN – No Frame

F – Mounting Frame

8.BACKLIGHT TYPEW – LED White
9.TOUCH PANELN – No Touch Panel

R – Resistive Touch Panel

C – Capacitive Touch Panel

10.VERSION00 (00-99)

2. Assembly guide – integration

NAME OF THE PRODUCTPART NUMBERDESCRIPTION
RiTFT-35RVT35AHBNWN00BT816, no touch panel
RiTFT-35-RESRVT35AHBNWR00BT816, resistive touch panel
RiTFT-35-CAPRVT35AHBNWC00BT815, capacitive touch panel
RiTFT-35-FRRVT35AHBFWN00BT816, no touch panel, mounting frame
RiTFT-35-RES-FRRVT35AHBFWR00BT816, resistive touch panel, mounting frame
RiTFT-35-CAP-FRRVT35AHBFWC00BT815, capacitive touch panel, mounting frame

2.1. Mounting frame

For dimensions 3.5”, 4.3”, 5.0” and 7.0” the product with mounting frame version is available. Thanks to the four catches attached to the side, frame provides strong assembly to the surface by mounting element (like the screw, see Figure 3). The frames are specially designed to fit Riverdi products perfectly. The diameter of the mounting hole is 3.5mm.

Figure 1. Mounting frame

2. Drawings

4. Absolute maximum ratings

PARAMETERSYMBOLMINMAXUNIT
Supply Voltage for LogicVDD04.0V
Supply Voltage for LED InverterBLVDD07.0V
Input Voltage for LogicVIN04.0V
LED forward current (each LED)IF25mA
Operating TemperatureTOP-2070°C
Storage TemperatureTST-3080°C
HumidityRH90% (Max 60°C)RH

Note: The LED life time is defined as the module brightness decrease to 50% original brightness at Ta=25°C.

5. Electrical characteristics

PARAMETER

SYMBOL

MIN

TYP

MAX

UNIT

NOTES

Supply Voltage For Module

VDD

3.0

3.3

3.6

V

Input Voltage for LED Inverter

BLVDD

2.8

5.0

5.5

V

LED Backlight Current

IDDbacklight

150

187

mA

BLVDD=3.3V

LED Backlight Current

IDDbacklight

93

117

mA

BLVDD=5V

Input Voltage ‘ H ‘ level

VIH

0.7VDD

VDD

V

Input Voltage ‘ L ‘ level

VIL

0

0.2VDD

V

Input Current

IIn

TBD

mA

Input Current for module with CTP

IInC

TBD

mA

Note: The LED life time is defined as the module brightness decrease to 50% original brightness at Ta=25°C.

6. Backlight characteristics

ITEMSYMBOLMINTYPMAXUNIT
Voltage for LED backlightVl19.220.4V
Current for LED backlightIl2025mA
LED Life Time3000050000Hrs

Note: The LED Supply Voltage is defined by the numbers of LED at Ta=25°C and IL= 20mA.

7. Electro-optical characteristics

ITEMSYMBOLCONDITIONMINTYPMAXUNITREMARKNOTE
Response TimeTr+Tfθ=0°
∅=0°
Ta=25
2530msFigure 24
Contrast RatioCr350Figure 31
Luminance Uniformityδ WHITE7580%Figure 33
Surface LuminanceTFTLv490540cd/m2Figure 32
TFT+CTP440490
TFT+RTP400440
Viewing Angle Rangeθ∅ = 90°3040degFigure 46
∅ = 270°5060degFigure 4
∅ = 0°5060degFigure 4
∅ = 180°5060degFigure
CIE (x, y)
Chromaticity
Redxθ=0°
∅=0°
Ta=25
0.5740.6240.674Figure 35
y0.3180.3680.418
Greenx0.3000.3500.400
y0.5000.5500.600
Bluex0.0930.1430.193
y0.0690.1190.169
Whitex0.2600.3100.360
y0.2830.3330.383

Note 1. Contrast Ratio(CR) is defined mathematically as below, for more information see  Figure 3 .

Note 2. Surface luminance is the LCD surface from the surface with all pixels displaying white. For more information, see Figure 3 .

Note 3. The uniformity in surface luminance δ WHITE is determined by measuring luminance at each test position 1 through 5, and then dividing the maximum luminance of 5 points luminance by minimum luminance of 5 points luminance. For more information, see Figure 3 .

Note 4. Response time is the time required for the display to transition from white to black (Rise Time, Tr) and from black to white (Decay Time, Tf). For additional information see FIG 1. The test equipment is Autronic-Melchers’s ConoScope series.

Note 5. CIE (x, y) chromaticity, the x, y value is determined by measuring luminance at each test position 1 through 5, and then make average value.

Note 6. Viewing angle is the angle at which the contrast ratio is greater than 2. For TFT module the contrast ratio is greater than 10. The angles are determined for the horizontal or x axis and the vertical or y axis with respect to the z axis which is normal to the LCD surface. For more information see Figure 4.

Note 7. For viewing angle and response time testing, the testing data is based on Autronic-Melchers’s ConoScope series. Instruments for Contrast Ratio, Surface Luminance, Luminance Uniformity, CIE the test data is based on TOPCON’s BM-5 photo detector.

Note 8. For TFT module, Gray scale reverse occurs in the direction of panel viewing angle.

Figure 2. The definition of response time

Figure 3. Measuring method for Contrast ratio, surface luminance, Luminance uniformity, CIE (x, y) chromaticity

Figure 4.The definition of viewing angle

8. Interface description

PIN NO.SYMBOLDESCRIPTION
1VDDPower Supply
2GNDGround
3SPI_SCLKSPI SCK Signal, Internally 47k Pull UP
4MISO/ IO1SPI MISO Signal / SPI Quad mode: SPI data line 1
5MOSI/ IO0SPI MOSI Signal / SPI Quad mode: SPI data line 0
6CSSPI Chip Select Signal , Internally 47k Pull UP
7INTInterrupt Signal, Active Low, Internally 47k Pull UP
8PDPower Down Signal, Active Low, Internally 47k Pull UP
9NCNot Connected
10AUDIO_OUTAudio Out Signal
11GPIO0/IO2SPI Single mode: General purpose IO0/ SPI Quad mode: SPI data line 2
12GPIO1/IO3SPI Single mode: General purpose IO1/  SPI Quad mode: SPI data line 3
13GPIO2General purpose IO2
14GPIO3General purpose IO3 or analog input for ADC
15NCNot Connected
16NCNot Connected
17BLVDDBacklight Power Supply, Can Be Connected to VDD
18BLVDDBacklight Power Supply, Can Be Connected to VDD
19BLGNDBacklight Ground, Internally connected to GND
20BLGNDBacklight Ground, Internally connected to GND

9. BT8x Controller specifications

BT8x or EVE3 (Embedded Video Engine 3) simplifies the system architecture for advanced human machine interfaces (HMIs) by providing functionality for display, audio, and touch as well as an object oriented architecture approach that extends from display creation to the rendering of the graphics.

9.1. Serial host interface

Figure 5.SPI interface connection

Figure 6. QSPI interface connection

SPI Interface – the SPI slave interface operates up to 30MHz.

Only SPI mode 0 is supported. The SPI interface is selected by default (MODE pin is internally pulled low by 47k resistor).

9.2. Block diagram

Figure 7. BT81x timing diagram

9.3. Host Interface SPI mode 0

Figure 8. SPI timing diagram

For more information about BT8x controller please go to official BT8x website.

https://www.ftdichip.com/Products/ICs/BT81X.html

9.4. Backlight driver block diagram

Backlight enable signal is internally connected to BT8x Backlight control pin. This pin is controlled

by two BT8x’s registers.  One of them specifies the PWM output frequency, second one specifies the duty cycle. Refer to BT8x datasheet for more information.

Figure 9. Backlight driver block diagram

10. LCD timing characteristics

10.1. Clock and data input time diagram

Figure 10. DE mode timing diagram

Figure 11. SYNC mode timing diagram

Figure 12. Timing diagram

10.2. Parallel RGB timing table

Timing parameter (VDD=3.3V, GND=0V, Ta=25˚C)

PARAMETERSYMBOLMINTYPMAXUNITCONDITION
CLK Clock TimeTclk1/Max(FCLK)1/Min(FCLK)ns
CLK Pulse DutyTchw405060%TCLK
HSYNC to CLKThc1CLK
HSYNC WidthThwh1CLK
VSYNC WidthTvwh1ns
HSYNC Period TimeTh6063.5667ns
VSYNC Set-up TimeTvst12ns
VSYNC Hold TimeTvhd12ns
HSYNC Setup TimeThst12ns
HSYNC Hold TimeThhd12ns
Data Set-up TimeTdsu12nsD00~D23 to CLK
Data Hold TimeTdhd12nsD00~D23 to CLK
DEN Set-up TimeTesu12nsDEN to CLK

11. Touch panel specifications

11.1. Electrical characteristics

Note: Avoid operating with hard or sharp material such as a ball point pen or a mechanical pencil except a polyacetal pen (tip R0.8mm or less) or a finger

11.1.1. For capacitive touch panel

DESCRIPTIONSPECIFICATION
Operating VoltageDC 2.8~3.6V
Power Consumption (IDD)Active Mode10~18mA
Sleep Mode30~50μA
InterfaceI2C
Linearity<1.5%
ControllerFT5346
I2C address0x38 (7 bit address)
Resolution896*640

11.1.2. For resistive touch panel

ITEMVALUEUNITREMARK
Min.Typ.Max.
Linearity1.5%Analog X and Y directions
Terminal Resistance200900ΩX
100600ΩY
Insulation Resistance20DC 25V
Voltage10VDC
Chattering10ms100kΩ pull-up
Transparency78%JIS K7105

11.2. Mechanical characteristics

Note 1: Force test condition, Input DC 5V on X direction, Drop off Polyacetal Stylus (R0.8), until output voltage stabilize, then get the R8.0mm Silicon rubber and do finger Activation force test. Next step, 9 points.

Note 2: Measurement surface area conditions, Scratch 100,000 times straight line on the film with a stylus change every 20,000 times with Force: 250gf, Speed: 60mm/sec by R0.8 polaceteal stylus.

Note 3: Pitting test, Pit 1, 000, 000 times on the film with R0.8 silicon rubber with Force: 250gf and Speed: 2 times/sec.

11.2.1 for capacitive touch panel

DESCRIPTIONINL SPECIFICATIONREMARK
Touch Panel Size3.5  inch
Outline Dimension (OD)76.75 mm x 63.00mmCover Lens Outline
Product Thickness1.40mm
Glass Thickness0.7 mm
Ink View Area72.00mm x 54.50mm
Sensor Active Area73.25mm x 55.90mm
Input Method5 Finger
Activation ForceTouch
Surface Hardness≥7H

11.2.2. For resistive touch panel

Note 1: Force test condition, Input DC 5V on X direction, drop off Polyacetal Stylus (R0.8), until output voltage stabilize, then get the R8.0mm Silicon rubber and do finger Activation force test. Next step, 9 points.

ITEMVALUEUNITREMARK
Min.Typ.Max.
Activation Force20100gfNote 1
Durability-Surface ScratchingWrite 100,000charactersNote 2
Durability-Surface Pitting1,000,000touchesNote 3
Surface Hardness3HJIS K5400

12. Inspection

Standard acceptance/rejection criteria for TFT module.

12.1. Inspection condition

Ambient conditions:

  •       Temperature: 25±°C
  •       Humidity: (60±10) %RH
  •       Illumination: Single fluorescent lamp non-directive (300 to 700 lux)

Viewing distance:

35±5cm between inspector bare eye and LCD.

Viewing Angle:

U/D: 45°/45°, L/R 45°/45°

12.2 Inspection standard

ItemCriterion
Black spots, white spots, light leakage, Foreign Particle (round Type)

*Spots density: 10 mm

Size < 5”
Average DiameterQualified Qty
D < 0.2 mmIgnored
0.2 mm < D < 0.3 mm3
0.3 mm < D < 0.5 mm2
0.5 mm < D0
Size >= 5”
Average DiameterQualified Qty
D<0.2 mmIgnored
0.2 mm < D < 0.3 mm4
0.3 mm < D < 0.5 mm2
0.5 mm < D0
LCD black spots, white spots, light leakage (line Type)

*Spots density: 10 mm

Size < 5”
LengthWidthQualified Qty
W< 0.02Ignored
L < 3.00.02 < W <0.052
L < 2.50.05 < W <0.08
0.08 < W0
Size >= 5”
LengthWidthQualified Qty
W< 0.02Ignored
L < 3.00.02 < W <0.054
L < 2.50.05 < W <0.08
0.08 < W0
ItemCriterion
Clear spots
Size < 5”
Average DiameterQualified Qty
D < 0.2 mmIgnored
0.2 mm < D < 0.3 mm3
0.3 mm < D < 0.5 mm2
0.5 mm < D0
Size >= 5”
Average DiameterQualified Qty
D<0.2 mmIgnored
0.2 mm < D < 0.3 mm4
0.3 mm < D < 0.5 mm2
0.5 mm < D0

*Spots density: 10 mm

Polarizer bubbles
Size < 5”
Average DiameterQualified Qty
D < 0.2 mmIgnored
0.2 mm < D < 0.5 mm3
0.5 mm < D < 1 mm2
1 mm < D0
Total Q’ty3
Size >= 5”
Average DiameterQualified Qty
D<0.25 mmIgnored
0.25 mm < D < 0.5 mm3
0.5 mm < D0
Electrical Dot Defect
Size < 5”
itemQualified Qty
Black do defect4
Bright dot defect2
Total Dot5
Size >= 5”
itemQualified Qty
Black do defect5
Bright dot defect2
Total Dot5
ItemCriterion
Touch panel spot
Size < 5”
Average DiameterQualified Qty
D < 0.2 mmIgnored
0.2 mm < D < 0.4 mm5
0.4 mm < D < 0.5 mm2
0.5 mm < D0
Size >= 5”
Average DiameterQualified Qty
D<0.25 mmIgnored
0.25 mm < D < 0.5 mm4
0.5 mm < D0
Touch panel White Line Scratch
Size < 5”
LengthWidthQualified Qty
W< 0.02Ignored
L < 3.00.02 < W <0.052
L < 2.50.05 < W <0.08
0.08 < W0
Size >= 5”
LengthWidthQualified Qty
W< 0.03Ignored
L < 5.00.03 < W <0.052
0.05 < W0

13. Reliability test

NO.TEST ITEMTEST CONDITIONREMARKS
1High Temperature Storage80±2°C/240hoursNote 2
2Low Temperature Storage-30±2°C/240hoursNote 1,2
3High Temperature Operating70±2°C/240hours
4Low Temperature Operating-20±2°C/240hoursNote 1
5Temperature Cycle-30±2°C~25±2°C ~80±2°C × 20 cycles

(30min.)  (5min.)   (30min.)

Note 1,2
6Damp Proof Test60°C ±5°C × 90%RH/240hours
7Vibration TestFrequency 10Hz~55Hz

Amplitude of vibration : 1.5mm

Sweep time: 12 min

X, Y, Z 2 hours for each direction.

8Package Drop TestHeight:60 cm

1 corner, 3 edges, 6 surfaces

9ESD TestAir: ±4KV 150pF/330Ω 5 times

Contact: ±2KV 150pF/330Ω 5 times

10ESD Test for RTPAir: ±8KV 150pF/330Ω 5 times

Contact: ±4KV 150pF/330Ω 5 times

Note 1: Without water condensation.

Note 2: The function test shall be conducted after 2 hours storage at the room temperature and humidity after removed from the test chamber.

14. Legal information

Riverdi grants the guarantee for the proper operation of the goods for a period of 12 months from

the date of possession of the goods. If as a consequence of performing the obligation resulting from this guarantee the customer received a good free of defect instead of the defective good, then the period for the effectiveness of the guarantee shall commence anew from the moment the customer receives the good free of defects. Information about device is the property of Riverdi and may be the subject of patents pending or granted. It is not allowed to copy or disclosed this document without prior written permission.

Riverdi endeavors to ensure that the all contained information in this document is correct but does not accept liability for any error or omission. Riverdi products are in developing process and published information may be not up to date. Riverdi reserves the right to update and makes changes to Specifications or written material without prior notice at any time. It is important to check the current position with Riverdi.

Images and graphics used in this document are only for illustrative the purpose. All images and graphics are possible to be displayed on the range products of Riverdi, however the quality may vary. Riverdi is no liable to the buyer or to any third party for any indirect, incidental, special, consequential, punitive or exemplary damages (including without limitation lost profits, lost savings, or loss of business opportunity) relating to any product, service provided or to be provided by Riverdi, or the use or inability to use the same, even if Riverdi has been advised of the possibility of such damages.

Riverdi products are not fault tolerant nor designed, manufactured or intended for use or resale as on line control equipment in hazardous environments requiring fail–safe performance, such as in the operation of nuclear facilities, aircraft navigation or communication systems, air traffic control, direct life support machines or weapons systems in which the failure of the product could lead directly to death, personal injury or severe physical or environmental damage (‘High-Risk Activities’). Riverdi and its suppliers specifically disclaim any expressed or implied warranty of fitness for High-Risk Activities. Using Riverdi products and devices in ‘High-Risk Activities’ and in any other application is entirely at the buyer’s risk, and the buyer agrees to defend, indemnify and hold harmless Riverdi from any and all damages, claims or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Riverdi intellectual property rights. 

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