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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

ITEM CONTENTS UNIT
LCD Type TFT/Transmissive/Normally white /
Size 3.5 Inch
Viewing Direction 12:00 (without image inversion) O’ Clock
Gray Scale Inversion Direction 6:00 O’ Clock
Number of Dots 320 x (RGB) × 240 /
Driver IC BT81x /
Interface Type SPI/QSPI /
Module Memory Size 1 MB (BT81x) + 64 Mb (external flash) /
Brightness no touch module 540 cd/m2
CTP module 480
RTP module 450
Color Depth 262k /
Pixel Arrangement RGB Vertical Stripe /
Surface Treatment Anti-glare / Clear (for CTP) /
Input Voltage 3.3 V

Note 1: RoHS, REACH SVHC compliant

Note 2: LCM weight tolerance: ± 5%.

1. Module classification information

RV T 35 A H B x W x 00
1. 2. 3. 4. 5. 6. 7. 8. 9. 10.
1. BRAND RV – Riverdi
2. PRODUCT TYPE T – TFT Standard

F – TFT Custom

3. DISPLAY SIZE 35 – 3.5”
4. MODEL SERIAL NO. A (A-Z)
5. RESOLUTION H– 320×240 px
6. INTERFACE B – TFT + Controller BT81x
7. FRAME N – No Frame

F – Mounting Frame

8. BACKLIGHT TYPE W – LED White
9. TOUCH PANEL N – No Touch Panel

R – Resistive Touch Panel

C – Capacitive Touch Panel

10. VERSION 00 (00-99)

2. Assembly guide – integration

NAME OF THE PRODUCT PART NUMBER DESCRIPTION
RiTFT-35 RVT35AHBNWN00 BT816, no touch panel
RiTFT-35-RES RVT35AHBNWR00 BT816, resistive touch panel
RiTFT-35-CAP RVT35AHBNWC00 BT815, capacitive touch panel
RiTFT-35-FR RVT35AHBFWN00 BT816, no touch panel, mounting frame
RiTFT-35-RES-FR RVT35AHBFWR00 BT816, resistive touch panel, mounting frame
RiTFT-35-CAP-FR RVT35AHBFWC00 BT815, 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

PARAMETER SYMBOL MIN MAX UNIT
Supply Voltage for Logic VDD 0 4.0 V
Supply Voltage for LED Inverter BLVDD 0 7.0 V
Input Voltage for Logic VIN 0 4.0 V
LED forward current (each LED) IF 25 mA
Operating Temperature TOP -20 70 °C
Storage Temperature TST -30 80 °C
Humidity RH 90% (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

ITEM SYMBOL MIN TYP MAX UNIT
Voltage for LED backlight Vl 19.2 20.4 V
Current for LED backlight Il 20 25 mA
LED Life Time 30000 50000 Hrs

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

7. Electro-optical characteristics

ITEM SYMBOL CONDITION MIN TYP MAX UNIT REMARK NOTE
Response Time Tr+Tf θ=0°
∅=0°
Ta=25
25 30 ms Figure 2 4
Contrast Ratio Cr 350 Figure 3 1
Luminance Uniformity δ WHITE 75 80 % Figure 3 3
Surface Luminance TFT Lv 490 540 cd/m2 Figure 3 2
TFT+CTP 440 490
TFT+RTP 400 440
Viewing Angle Range θ ∅ = 90° 30 40 deg Figure 4 6
∅ = 270° 50 60 deg Figure 4
∅ = 0° 50 60 deg Figure 4
∅ = 180° 50 60 deg Figure
CIE (x, y)
Chromaticity
Red x θ=0°
∅=0°
Ta=25
0.574 0.624 0.674 Figure 3 5
y 0.318 0.368 0.418
Green x 0.300 0.350 0.400
y 0.500 0.550 0.600
Blue x 0.093 0.143 0.193
y 0.069 0.119 0.169
White x 0.260 0.310 0.360
y 0.283 0.333 0.383

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. SYMBOL DESCRIPTION
1 VDD Power Supply
2 GND Ground
3 SPI_SCLK SPI SCK Signal, Internally 47k Pull UP
4 MISO/ IO1 SPI MISO Signal / SPI Quad mode: SPI data line 1
5 MOSI/ IO0 SPI MOSI Signal / SPI Quad mode: SPI data line 0
6 CS SPI Chip Select Signal , Internally 47k Pull UP
7 INT Interrupt Signal, Active Low, Internally 47k Pull UP
8 PD Power Down Signal, Active Low, Internally 47k Pull UP
9 NC Not Connected
10 AUDIO_OUT Audio Out Signal
11 GPIO0/IO2 SPI Single mode: General purpose IO0/ SPI Quad mode: SPI data line 2
12 GPIO1/IO3 SPI Single mode: General purpose IO1/  SPI Quad mode: SPI data line 3
13 GPIO2 General purpose IO2
14 GPIO3 General purpose IO3 or analog input for ADC
15 NC Not Connected
16 NC Not Connected
17 BLVDD Backlight Power Supply, Can Be Connected to VDD
18 BLVDD Backlight Power Supply, Can Be Connected to VDD
19 BLGND Backlight Ground, Internally connected to GND
20 BLGND Backlight 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)

PARAMETER SYMBOL MIN TYP MAX UNIT CONDITION
CLK Clock Time Tclk 1/Max(FCLK) 1/Min(FCLK) ns
CLK Pulse Duty Tchw 40 50 60 % TCLK
HSYNC to CLK Thc 1 CLK
HSYNC Width Thwh 1 CLK
VSYNC Width Tvwh 1 ns
HSYNC Period Time Th 60 63.56 67 ns
VSYNC Set-up Time Tvst 12 ns
VSYNC Hold Time Tvhd 12 ns
HSYNC Setup Time Thst 12 ns
HSYNC Hold Time Thhd 12 ns
Data Set-up Time Tdsu 12 ns D00~D23 to CLK
Data Hold Time Tdhd 12 ns D00~D23 to CLK
DEN Set-up Time Tesu 12 ns DEN 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

DESCRIPTION SPECIFICATION
Operating Voltage DC 2.8~3.6V
Power Consumption (IDD) Active Mode 10~18mA
Sleep Mode 30~50μA
Interface I2C
Linearity <1.5%
Controller FT5346
I2C address 0x38 (7 bit address)
Resolution 896*640

11.1.2. For resistive touch panel

ITEM VALUE UNIT REMARK
Min. Typ. Max.
Linearity 1.5 % Analog X and Y directions
Terminal Resistance 200 900 Ω X
100 600 Ω Y
Insulation Resistance 20 DC 25V
Voltage 10 V DC
Chattering 10 ms 100kΩ pull-up
Transparency 78 % 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

DESCRIPTION INL SPECIFICATION REMARK
Touch Panel Size 3.5  inch
Outline Dimension (OD) 76.75 mm x 63.00mm Cover Lens Outline
Product Thickness 1.40mm
Glass Thickness 0.7 mm
Ink View Area 72.00mm x 54.50mm
Sensor Active Area 73.25mm x 55.90mm
Input Method 5 Finger
Activation Force Touch
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.

ITEM VALUE UNIT REMARK
Min. Typ. Max.
Activation Force 20 100 gf Note 1
Durability-Surface Scratching Write 100,000 characters Note 2
Durability-Surface Pitting 1,000,000 touches Note 3
Surface Hardness 3 H JIS 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

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

*Spots density: 10 mm

Size < 5”
Average Diameter Qualified Qty
D < 0.2 mm Ignored
0.2 mm < D < 0.3 mm 3
0.3 mm < D < 0.5 mm 2
0.5 mm < D 0
Size >= 5”
Average Diameter Qualified Qty
D<0.2 mm Ignored
0.2 mm < D < 0.3 mm 4
0.3 mm < D < 0.5 mm 2
0.5 mm < D 0
LCD black spots, white spots, light leakage (line Type)

*Spots density: 10 mm

Size < 5”
Length Width Qualified Qty
W< 0.02 Ignored
L < 3.0 0.02 < W <0.05 2
L < 2.5 0.05 < W <0.08
0.08 < W 0
Size >= 5”
Length Width Qualified Qty
W< 0.02 Ignored
L < 3.0 0.02 < W <0.05 4
L < 2.5 0.05 < W <0.08
0.08 < W 0
Item Criterion
Clear spots
Size < 5”
Average Diameter Qualified Qty
D < 0.2 mm Ignored
0.2 mm < D < 0.3 mm 3
0.3 mm < D < 0.5 mm 2
0.5 mm < D 0
Size >= 5”
Average Diameter Qualified Qty
D<0.2 mm Ignored
0.2 mm < D < 0.3 mm 4
0.3 mm < D < 0.5 mm 2
0.5 mm < D 0

*Spots density: 10 mm

Polarizer bubbles
Size < 5”
Average Diameter Qualified Qty
D < 0.2 mm Ignored
0.2 mm < D < 0.5 mm 3
0.5 mm < D < 1 mm 2
1 mm < D 0
Total Q’ty 3
Size >= 5”
Average Diameter Qualified Qty
D<0.25 mm Ignored
0.25 mm < D < 0.5 mm 3
0.5 mm < D 0
Electrical Dot Defect
Size < 5”
item Qualified Qty
Black do defect 4
Bright dot defect 2
Total Dot 5
Size >= 5”
item Qualified Qty
Black do defect 5
Bright dot defect 2
Total Dot 5
Item Criterion
Touch panel spot
Size < 5”
Average Diameter Qualified Qty
D < 0.2 mm Ignored
0.2 mm < D < 0.4 mm 5
0.4 mm < D < 0.5 mm 2
0.5 mm < D 0
Size >= 5”
Average Diameter Qualified Qty
D<0.25 mm Ignored
0.25 mm < D < 0.5 mm 4
0.5 mm < D 0
Touch panel White Line Scratch
Size < 5”
Length Width Qualified Qty
W< 0.02 Ignored
L < 3.0 0.02 < W <0.05 2
L < 2.5 0.05 < W <0.08
0.08 < W 0
Size >= 5”
Length Width Qualified Qty
W< 0.03 Ignored
L < 5.0 0.03 < W <0.05 2
0.05 < W 0

13. Reliability test

NO. TEST ITEM TEST CONDITION REMARKS
1 High Temperature Storage 80±2°C/240hours Note 2
2 Low Temperature Storage -30±2°C/240hours Note 1,2
3 High Temperature Operating 70±2°C/240hours
4 Low Temperature Operating -20±2°C/240hours Note 1
5 Temperature Cycle -30±2°C~25±2°C ~80±2°C × 20 cycles

(30min.)  (5min.)   (30min.)

Note 1,2
6 Damp Proof Test 60°C ±5°C × 90%RH/240hours
7 Vibration Test Frequency 10Hz~55Hz

Amplitude of vibration : 1.5mm

Sweep time: 12 min

X, Y, Z 2 hours for each direction.

8 Package Drop Test Height:60 cm

1 corner, 3 edges, 6 surfaces

9 ESD Test Air: ±4KV 150pF/330Ω 5 times

Contact: ±2KV 150pF/330Ω 5 times

10 ESD Test for RTP Air: ±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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