This datasheet gives detailed information about the Riverdi 3.5″ EVE1 displays. The displays come in different versions: with capacitive, resistive, or no touchscreen, and with our without a metal mounting frame.
Rev.1.0
2019-06-07
| 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 | FT80x | / | |
| Interface Type | SPI/I2C | / | |
| 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%.
Revision Record
| REV NO. | REVDATE | CONTENTS | REMARKS |
| 1.0 | 2019-06-07 | Initial Release |
Table of Content
10. Touch screen panel specifications
10.1. Electrical characteristics
10.1.1. For capacitive touch panel
10.1.2. For resistive touch panel
10.2. Mechanical characteristics
10.2.1. For capacitive touch panel
10.2.2. For resistive touch panel
11. Inspection
11.1. Inspection condition
11.2. Inspection standard
12. Reliability test
1. Module classification information
| RV | T | 35 | A | 320 240 | C | X | W | x | 0x |
| 1. | 2. | 3. | 4. | 5. | 6. | 7. | 8. | 9. | 10. |
| 1. | BRAND | RV – Riverdi |
| 2. | PRODUCT TYPE | T – TFT Standard |
| 3. | DISPLAY SIZE | 35 – 3.5” |
| 4. | MODEL SERIAL NO. | A (A-Z) |
| 5. | RESOLUTION | 320240– 320×240 px |
| 6. | INTERFACE | C– TFT+controller FT8xx |
| 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 | 0x (00-99) |
2. Assembly guide – integration
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
3. Drawings
4. Absolute maximum ratings
| PARAMETER | SYMBOL | MIN | MAX | UNIT |
| Supply Voltage for Logic (VDD pin) | VDD | 0 | 4.0 | V |
| Supply Voltage for Logic (BLVDD pins) | BLVDD | 0 | 7.0 | V |
| Input Voltage For Logic | VIN | GND | VDD | V |
| Operating Temperature | TOP | -20 | 70 | °C |
| Storage Temperature | TST | -30 | 80 | °C |
| Humidity | RH | – | 90% (Max 60°C) | RH |
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 | 3.3 | 5.5 | V | |
| Input Current (Exclude LED Backlight) | IDD | – | 55 | 69 | mA | VDD=3.3V |
| LED Backlight Current | IDDbacklight | – | 150 | 187 | mA | BLVDD=3.3V |
| LED Backlight Current | IDDbacklight | – | 93 | 117 | mA | BLVDD=5V |
| Total Input current (Include LED Backlight 100%) | IDDtotal | – | 205 | 257 | mA | BLVDD=3.3V |
| Input Voltage ‘H’ level | Vih | 0.7VDD | – | VDD | V | |
| Input Voltage ‘L’ level | Vil | GND | – | 0.2VDD | V | |
| LED Life Time | – | 40000 | 50000 | – | Hrs | Note1 |
Note: The LED life time is defined as the module brightness decrease to 50% original brightness at Ta=25°C.
6. Electro-optical characteristics
| ITEM | SYMBOL | CONDITION | MIN | TYP | MAX | UNIT | REMARK | NOTE | |
| Response Time | Tr+Tf | θ=0° ∅=0° Ta=25°C | – | 25 | 30 | ms | Figure 1 | 4 | |
| Contrast Ratio | Cr | – | 350 | – | — | Figure 2 | 1 | ||
| Luminance Uniformity | δ WHITE | 75 | 80 | – | % | Figure 2 | 3 | ||
Surface Luminance | TFT | Lv | – | 540 | – | cd/m2 | Figure 2 | 2 | |
| TFT+CTP | – | 480 | – | ||||||
| TFT+RTP | – | 450 | – | ||||||
Viewing Angle Range | θ | ∅ = 90° | 30 | 40 | – | deg | Figure 3 | 6 | |
| ∅ = 270° | 50 | 60 | – | deg | Figure 3 | ||||
| ∅ = 0° | 50 | 60 | – | deg | Figure 3 | ||||
| ∅ = 180° | 50 | 60 | – | deg | Figure 3 | ||||
CIE (x, y) Chromaticity | Red | x | θ=0° ∅=0° Ta=25°C | 0.574 | 0.624 | 0.674 | Figure 2 | 5 | |
| y | 0.318 | 0.368 | 0.418 | ||||||
Green | x | 0.3 | 0.35 | 0.4 | |||||
| y | 0.5 | 0.55 | 0.6 | ||||||
Blue | x | 0.093 | 0.143 | 0.193 | |||||
| y | 0.069 | 0.119 | 0.169 | ||||||
White | x | 0.26 | 0.31 | 0.36 | |||||
| y | 0.283 | 0.333 | 0.383 | ||||||
| NTSC | – | – | – | – | 50 | – | % | – | |
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
7. Interface description
| PIN NO. | SYMBOL | DESCRIPTION |
| 1 | VDD | Power Supply |
| 2 | GND | Ground |
| 3 | SPI_SCLK/ I2C_SCL | SPI SCK Signal / I2C SCL Signal, Pulled Up Inside Display by 47k Resistor |
| 4 | MISO/ I2C_SDA | SPI MISO Signal / I2C SDA Signal, Pulled Up Inside Display by 47k Resistor |
| 5 | MOSI/ I2C_SA0 | SPI MOSI Signal / I2C Slave Address Bit 0, Pulled Up Inside Display by 47k Resistor |
| 6 | CS/I2C_SA1 | SPI Chip Select Signal / I2C Slave Address Bit 1, Pulled Up Inside Display by 47k Resistor |
| 7 | INT | Interrupt Signal, Active Low, Pulled Up Inside Display by 47k Resistor |
| 8 | PD | Power Down Signal, Active Low, Pulled Up Inside Display by 47k Resistor |
| 9 | MODE | Host Interface SPI(Pull Low) or I2C(Pull Up) Mode Select Input, By Default Pulled Low Inside Display by 47k Resistor |
| 10 | AUDIO_OUT | Audio Out Signal |
| 11 | NC | Not Connected |
| 12 | NC | Not Connected |
| 13 | NC | Not Connected |
| 14 | NC | Not Connected |
| 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 |
8. FT80x Controller specifications
FT80x or EVE (Embedded Video Engine) 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.
8.1. Serial host interface
Figure 5. SPI interface connection
Figure 6. I2C 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).
I²C Interface – the I²C slave interface operates up to 3.4MHz, supporting standard-mode, fast-mode, fast-mode plus and high-speed mode.
The I²C device address is configurable between 20h to 23h depending on the I²C_SA[1:0] pin setting, i.e. the 7-bit I2C slave address is 0b’01000A1A0.
The I²C interface is selected when the MODE pin is tied to VDDIO.
8.2. Block diagram
Figure 7. FT800 Block diagram
8.3. Host Interface SPI mode 0
Figure 8. SPI timing diagram
For more information about FT800 controller please go to official FT800 Datasheet.
http://www.ftdichip.com/Support/Documents/DataSheets/ICs/DS_FT800.pdf
8.4. Backlight driver block diagram
Backlight enable signal is internally connected to FT80x Backlight control pin. This pin is controlled by two FT80x’s registers. One of them specifies the PWM output frequency, second one specifies the duty cycle. Refer to FT80x datasheet for more information.
Figure 9. Backlight driver block diagram
9. LCD timing characteristics
9.1. Timing Chart
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 |
Figure 10. DE mode timing diagram
Figure 11. SYNC mode timing diagram
Figure 12. Timing diagram
9.2. 24Bit RGB Mode for 320 x RGB x 240
| PARAMETER | SYMBOL | MIN | TYP | MAX | UNIT | CONDITION |
| CLK Frequency | Fclk | 7.0 | 8.0 | 9.0 | MHz | VDD=3.0V~3.6V |
| CLK Cycle Time | Tclk | 143 | 125 | 111 | ns | – |
| CLK Pulse Duty | Tcwh | 40 | 50 | 60 | % | – |
| Time that HSYNC to 1st Data Input (NTSC) | Ths | 40 | 70 | 255 | CLK | DDLY=70 Offset=0(fixed) |
Figure 13. 24 bit RGB SYNC mode timing
10. Touch screen panel specifications
10.1. Electrical characteristics
10.1.1. 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 | FT5206 | |
| I2C address | 0x38 (7 bit address) | |
| Resolution | 896*640 | |
10.1.2. 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 | – | – | MΩ | DC 25V |
| Voltage | – | – | 10 | V | DC |
| Chattering | – | – | 10 | ms | 100kΩ pull-up |
| Transparency | 78 | – | – | % | |
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
10.2. Mechanical characteristics
10.2.1 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 | 1.26mm | |
| 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 |
10.2.2. For resistive touch panel
| 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 |
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. Inspection
Standard acceptance/rejection criteria for TFT module.
11.1. 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°
11.2 Inspection standard
| Item | Criterion | ||||||||||||||||||||||||||||||||||||
| Black spots, white spots, light leakage, Foreign Particle (round Type) |
| ||||||||||||||||||||||||||||||||||||
| LCD black spots, white spots, light leakage (line Type) |
| ||||||||||||||||||||||||||||||||||||
| Item | Criterion | ||||||||||||||||||||||||
| Clear spots |
*Spots density: 10 mm | ||||||||||||||||||||||||
| Polarizer bubbles |
| ||||||||||||||||||||||||
| Electrical Dot Defect |
| ||||||||||||||||||||||||
| Item | Criterion | ||||||||||||||||||||||||||||||||
| Touch panel spot |
| ||||||||||||||||||||||||||||||||
| Touch panel White Line Scratch |
| ||||||||||||||||||||||||||||||||
12. Reliability test
| NO. | TEST ITEM | TEST CONDITION | INSPECTION AFTER TEST |
| 1 | High Temperature Storage | 80±2°C/240 hours | Inspection after 2~4 hours storage at room temperature, the sample shall be free from defects: 1. Air bubble in the LCD 2. Seal leak 3. Non-display 4. Missing segments 5. Glass crack 6. Current Idd is twice higher than initial value 7. The surface shall be free from damage 8. Linearity must be no more than 1.5% by the linearity tester 9. The Electric characteristics requirements shall be satisfied |
| 2 | Low Temperature Storage | -30±2°C/240 hours | |
| 3 | High Temperature Operating | 70±2°C/240 hours | |
| 4 | Low Temperature Operating | -20±2°C/240 hours | |
| 5 | Temperature Cycle | -30±2°C~25~70±2°C × 30 cycles | |
| 6 | Damp Proof Test | 60°C ±5°C × 90%RH/160 hours | |
| 7 | Vibration Test | Frequency 10Hz~55Hz Stroke: 1.5mm Sweep: 10Hz~55Hz~10Hz 2 hours For each direction of X, Y, Z (6 hours for total) | |
| 8 | Mechanical Shock | 60G 6ms, ± X, ± Y, ± Z 3 times for each direction | |
| 9 | Packing Drop Test | Height: 80 cm 1 corner, 3 edges, 6 surfaces | |
| 10 | Package Vibration Test | Random vibration: 0.015G2/Hz from 5-200Hz -6dB/Octave from 200-500Hz 2 hours for each direction of X, Y, Z (6 hours for total) | |
| 11 | Electrostatic Discharge | Air: ±8KV 150pF/330Ω 5 times Contact: ±4KV 150pF/330Ω 5 times | |
| 12 | Hitting Test | 1,000,000 times in the same point Hitting pad: tip R3.75mm, Silicone rubber, Hardness: 40deg. Load: 2.45N Hitting speed: Twice/sec Electric load: none Test area should be at 1.8mm inside of insulation. | |
| 13 | Pen Sliding Durability Test | 100,000 times minimum Hitting pad: tip R0.8mm plastic pen Load: 1.47N Sliding speed: 60 mm/sec Electric load: none Test area should be at 1.8mm inside of insulation. | |
| Remark: 1. The test samples should be applied to only one test item. 2. Sample size for each test item is 5~10pcs. 3. For Damp Proof Test, Pure water (Resistance 10MΩ) should be used. 4. In case of malfunction defect caused by ESD damage, if it would be recovered to normal state after resetting, it would be judge as a good part. 5. EL evaluation should be excepted from reliability test with humidity and temperature: Some defects such as black spot/blemish can happen by natural chemical reaction with humidity and Fluorescence EL has. 6. Failure Judgment Criterion: Basic Specification, Electrical Characteristic, Mechanical Characteristic, Optical Characteristic. | |||
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.
