This datasheet gives detailed information about the Riverdi 4.3″ TFT displays with an RGB interface. The displays come in different versions: with capacitive, resistive, or no touchscreen, with a decorative cover glass, as well as with our without a metal mounting frame.

Rev.1.0
2019-06-07
ITEM | CONTENTS | UNIT | |
LCD Type | TFT/Transmissive/Normally white | / | |
Size | 4.3 | Inch | |
Viewing Direction | 12:00 (without image inversion) | O’ Clock | |
Gray Scale Inversion Direction | 6:00 | O’ Clock | |
Number of Dots | 480 x (RGB) × 272 | / | |
Driver IC | HX8257A | / | |
Interface Type | 24bit RGB | / | |
Brightness | no touch module | 550 | cd/m2 |
CTP module | 500 | ||
RTP module | 440 | ||
Color Depth | 16.7M | / | |
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
1. Module classification information
2. Assembly guide – integration
6. Electro-optical characteristics
7.1. Interface CTP
8.1. LCD Clock and data input time diagram
8.2. Parallel RGB input timing table for LCD
8.3. CTP interface timing characteristics
8.4. I2C Read/Write Interface description
8.5. Communication of the I2C interface with Host
8.7. Data description
9. Touch screen panel specification
9.1. Electrical characteristics
9.1.1. Capacitive touch panel
9.1.2. Resistive touch panel
9.2.1. Capacitive touch panel
9.2.2. Resistive touch panel
10 Inspection
10.1. Inspection condition
10.2. Inspection standard
11. Reliability test
1. Module classification information
RV | T | 4.3 | x | x | T | 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 | 43 – 4.3” |
4. | MODEL SERIAL NO. | x (A-Z)
U – UxTouch |
5. | RESOLUTION | 480272 – 480×272 px
L – 480×272 px |
6. | INTERFACE | T– LCD TFT |
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
Three options of rear side adhesive tape are available: double side adhesive tape 0.2 mm with 3M 467MP glue, foam double side adhesive tape 0.5 mm with DST 3M 9495LE glue or without any tape.
There are also two versions of glass color: black and white.
Rear side adhesive tape options:
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Double side adhesive tape with DST 3M 9495LE glue (total thickness 0.2mm) | Foam double side adhesive tape with 3M 9495LE glue (total thickness 0.5mm) | Without tape |
Cover glass color options:
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BLACK | WHITE |
Product options:
PART NUMBER | DESCRIPTION | |
RVT43ULTNWC00 | RGB, CTP uxTouch, black cover glass, 0.2mm DST | |
RVT43ULTNWC01 | RGB, CTP uxTouch, black cover glass, 0.5 mm DST | |
RVT43ULTNWC02 | RGB, CTP uxTouch, black cover glass, no DST | |
RVT43ULTNWC03 | RGB, CTP uxTouch, white cover glass, 0.2mm DST | |
RVT43ULTNWC04 | RGB, CTP uxTouch, white cover glass, 0.5 mm DST | |
RVT43ULTNWC05 | RGB, CTP uxTouch, white cover glass, no DST |
2.1. UxTouch assembly
UxTouch are LCD TFT displays with specially designed projected capacitive touch panels. UxTouch display can be mounted without any holed in the housing. Our standard UxTouch displays include double-sided adhesive tape (DST) to stick TFT easily to the housing. Basic series include 4.3”, 5.0” and 7.0” display sizes.
UxTouch models with double-side adhesive tape (PN with endings 00, 01, 03, 04) can be mounted by connecting the glass to the housing. Riverdi recommends to use support brackets assembled to display’s back. An additional support will stiffen the whole structure and minimize the influence of external factors such as vibration. Figure 1 and Figure 2 below show examples of using support elements.
Figure 1. Example of using support brackets

2.2. 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 2. Mounting frame

4. Absolute maximum ratings
PARAMETER | SYMBOL | MIN | MAX | UNIT |
Supply Voltage for LCD Logic | VDD | -0.3 | 4.5 | V |
Supply Voltage for CTP Logic | VDD-VSS | -0.3 | 3.6 | V |
Input Voltage for Logic | VIN | VSS-0.5 | VDD | V |
Operating Temperature | TOP | -20 | 70 | °C |
Storage Temperature | TST | -30 | 80 | °C |
Humidity | RH | – | 90% (Max 60°C) | RH |
LED forward current (each LED) | IF | – | 25 | mA |
5. Electrical characteristics
PARAMETER | SYMBOL | MIN | TYP | MAX | UNIT | NOTES |
Supply Voltage For Module | VDD | 3.0 | 3.3 | 3.6 | V | |
Input Current | IDD | – | 19.5 | – | mA | VDD=3.3V |
Input Voltage ‘H’ level | Vih | 0.7VDD | – | VDD | V | |
Input Voltage ‘L’ level | Vil | VSS | – | 0.3VDD | V | |
Voltage for LED backlight | Vl | 15 | 16 | 17 | V | |
Current for LED backlight | IL | – | 40 | – | mA | |
LED Life Time | – | 30000 | 50000 | – | Hrs | Note1 |
Note 1: 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 |
– | 20 | 30 | ms | Figure 4 | 4 | ||||
Contrast Ratio | Cr | 320 | 400 | – | — | Figure 5 | 1 | |||||
Luminance Uniformity | δ WHITE | 80 | – | – | % | Figure 5 | 3 | |||||
Surface Luminance
|
TFT |
Lv
|
440 | 550 | – |
cd/m2
|
Figure 5
|
2
|
||||
TFT+CTP | 400 | 500 | – | |||||||||
TFT+RTP | 350 | 440 | – | |||||||||
Viewing Angle Range
|
θ
|
∅ = 90° | 35 | 50 | – | deg | Figure 6 |
6
|
||||
∅ = 270° | 55 | 70 | – | deg | Figure 6 | |||||||
∅ = 0° | 55 | 70 | – | deg | Figure 6 | |||||||
∅ = 180° | 55 | 70 | – | deg | Figure 6 | |||||||
CIE (x, y)
Chromaticity |
Red
|
x |
θ=0°
∅=0° Ta=25 |
0.570 | 0.620 | 0.670 |
Figure 6
|
5
|
||||
y | 0.294 | 0.344 | 0.394 | |||||||||
Green
|
x | 0.256 | 0.306 | 0.356 | ||||||||
y | 0.513 | 0.563 | 0.613 | |||||||||
Blue
|
x | 0.083 | 0.133 | 0.183 | ||||||||
y | 0.099 | 0.149 | 0.199 | |||||||||
White
|
x | 0.250 | 0.300 | 0.350 | ||||||||
y | 0.280 | 0.330 | 0.380 |
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 3. 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 | NOTE |
1 | VLED- | Cathode Of LED Backlight | |
2 | VLED+ | Anode Of LED Backlight | |
3 | GND | Power Ground | |
4 | VDD | Power Voltage | |
5-12 | R0-R7 | Red Data (R0-LSB, R7-MSB) | |
13-20 | G0-G7 | Green Data (G0-LSB, G7-MSB) | |
21-28 | B0-B7 | Blue Data (B0-LSB, B7-MSB) | |
29 | GND | Power Ground | |
30 | DCLK | Pixel Clock | |
31 | DISP | Display On/Off | |
32 | HSYNC | Horizontal Sync Signal | |
33 | VSYNC | Vertical Sync Signal | |
34 | DE | Data Enable | |
35 | NC | No Connect | |
36 | GND | Power Ground | |
37 | NC | No Connect | |
38 | NC | No Connect | |
39 | NC | No Connect | |
40 | NC | No Connect |
Note 1: Displays marked with „rev.2.0” printing, have the ability to select the operating mode: HV mode or DE mode.
HVDSL=”H”: Set under HV mode, VSD and HSD signal have to provide by system.
HVDSL=”L”: Set under DE mode, DE signal have to provide by system.
By default: Internal pulled weak low.
7.1. Interface CTP
PIN NO. | SYMBOL | DESCRIPTION | REMARK |
1 | Vss | Power Ground | |
2 | Vdd | Power For CTP | |
3 | SCL | I2C SCL | |
4 | NC | – | |
5 | SDA | I2C SDA | |
6 | NC | – | |
7 | /RST | Reset pin | |
8 | NC | – | |
9 | /INT | Interrupt signal from CTP | |
10 | VSS | Power Ground |
8. Timing characteristics
8.1. LCD Clock and data input time diagram
Figure 5. Clock and data input time diagram

8.2. Parallel RGB input timing table for LCD
PARAMETER | SYMBOL | MIN | TYP | MAX | UNIT | |
DCLK Frequency | Fclk | 5 | 9 | 12 | MHz | |
VSD Period Time | Tv | 277 | 288 | 400 | H | |
VSD Display Area | Tvd | 272 | H | |||
VSD Back Porch | Tvb | 3 | 8 | 31 | H | |
VSD Front Porch | Tvfp | 2 | 8 | 97 | H | |
HSD Period Time | Th | 520 | 525 | 800 | DCLK | |
HSD Display Area | Thd | 480 | DCLK | |||
HSD Back Porch | Thbp | 36 | 40 | 255 | DCLK | |
HSD Front Porch | Thfp | 4 | 5 | 65 | DCLK |
8.3. CTP interface timing characteristics
PARAMETER | MIN | MAX | UNIT |
SCL Frequency | 0 | 400 | kHz |
Bus Free Time Between a STOP and START Condition | 4.7 | / | μs |
Hold Time (repeated) START Condition | 4.0 | / | μs |
Data Setup Time | 250 | / | ns |
Setup Time for Repeated START Condition | 4.7 | / | μs |
Setup Time for STOP Condition | 4.0 | / | μs |
8.4. I2C Read/Write Interface description
Figure 6. Write N bytes to I2C slave

Figure 7. Set Data Address

Figure 8. Read X bytes from I2C Slave

8.5. Communication of the I2C interface with Host
Figure 9. Communication of the I2C interface with Host

8.6. Touch data read protocol
ADDRESS | NAME | BIT7 | BIT6 | BIT5 | BIT4 | BIT3 | BIT2 | BIT1 | BIT0 | HOST ACCESS | ||
00h | DEVIDE_MODE | Device Mode[2:0] | RW | |||||||||
01h | GEST_ID | Gesture ID[7:0] | R | |||||||||
02h | TD_STATUS | Number of touch points[3:0] | R | |||||||||
03h | TOUCH1_XH | 1st Event Flag | 1st Touch X Position[11:8] | R | ||||||||
04h | TOUCH1_XL | 1st Touch X Position[7:0] | R | |||||||||
05h | TOUCH1_YH | 1st Touch ID[3:0] | 1st Touch X Position[11:8] | R | ||||||||
06h | TOUCH1_YL | 1st Touch Y Position[7:0] | R | |||||||||
07h | R | |||||||||||
08h | R | |||||||||||
09h | TOUCH2_XH | 2nd Event Flag | 2nd Touch X Position[11:8] | R | ||||||||
0Ah | TOUCH2_XL | 2nd Touch X Position[7:0] | R | |||||||||
0Bh | TOUCH2_YH | 2nd Touch ID[3:0] | 2nd Touch X Position[11:8] | R | ||||||||
0Ch | TOUCH2_YL | 2nd Touch Y Position[7:0] | R | |||||||||
0Dh | R | |||||||||||
0Eh | R | |||||||||||
0Fh | TOUCH3_XH | 3rd Event Flag | 3rd Touch X Position[11:8] | R | ||||||||
10h | TOUCH3_XL | 3rd Touch X Position[7:0] | R | |||||||||
11h | TOUCH3_YH | 3rd Touch ID[3:0] | 3rd Touch X Position[11:8] | R | ||||||||
12h | TOUCH3_YL | 3rd Touch Y Position[7:0] | R | |||||||||
13h | R | |||||||||||
14h | R | |||||||||||
15h | TOUCH4_XH | 4th Event Flag | 4th Touch X Position[11:8] | R | ||||||||
16h | TOUCH4_XL | 4th Touch X Position[7:0] | R | |||||||||
17h | TOUCH4_YH | 4th Touch ID[3:0] | 4th Touch X Position[11:8] | R | ||||||||
18h | TOUCH4_YL | 4th Touch Y Position[7:0] | R | |||||||||
19h | R | |||||||||||
1Ah | R | |||||||||||
1Bh | TOUCH5_XH | 5th Event Flag | 5th Touch X Position[11:8] | R | ||||||||
1Ch | TOUCH5_XL | 5th Touch X Position[7:0] | R | |||||||||
1Dh | TOUCH5_YH | 5th Touch ID[3:0] | 5th Touch X Position[11:8] | R | ||||||||
1Eh | TOUCH5_YL | 5th Touch Y Position[7:0] | R |
8.7 Data description
DEVICE_MODE
This register is the device mode register, configure it to determine the current mode of the chip.
ADRESS | BIT ADRESS | REGISTER NAME | DESCRIPTION |
00h | 6:4 | Device Mode [2:0] | 000b Work Mode
100b Factory Mode – Read Raw Data |
GEST_ID
This register describes the gesture of a valid touch.
ADRESS | BIT ADRESS | REGISTER NAME | DESCRIPTION |
01h | 7:0 | Gesture ID [7:0] | Gesture ID
0x10 Move Up 0x14 Move Down 0x18 Move Right 0x48 Zoom In 0x49 Zoom Out 0x00 No Gesture |
TD_STATUS
This register is the Touch Data status register.
ADRESS | BIT ADRESS | REGISTER NAME | DESCRIPTION |
02h | 3:0 | Number of Touch Points [2:0] | How Many Points Detected
1-5 is Valid |
7:4 |
TOUCHn_XH(n:1-10)
This register describes MSB of the X coordinate of the nth touch point and the corresponding event flag.
ADRESS | BIT ADRESS | REGISTER NAME | DESCRIPTION |
03h
~ 39h |
7:6 | Event Flag | 00b: Put Down
01b: Put Up 10b: Contact 11b: Reserved |
5:4 | Reserved | ||
3:0 | Touch X Position [11:8] | MSB of Touch X Position in Pixels |
TOUCHn_XL(n:1-10)
This register describes LSB of the X coordinate of the nth touch point.
ADRESS | BIT ADRESS | REGISTER NAME | DESCRIPTION |
04h
~ 3Ah |
7:0 | Touch X Position [7:0] | LSB of the Touch X Position in Pixels |
TOUCHn_YH(n:1-10)
This register describes MSB of the Y coordinate of the nth touch point and corresponding touch ID.
ADRESS | BIT ADRESS | REGISTER NAME | DESCRIPTION |
05h
~ 3Bh |
7:4 | Touch ID[3:0] | Touch ID of Touch Point |
3:0 | Touch X Position [11:8] | MSB of Touch Y Position in Pixels |
TOUCHn_YL(n:1-10)
This register describes LSB of the Y coordinate of the nth touch point.
ADRESS | BIT ADRESS | REGISTER NAME | DESCRIPTION |
05h
~ 3Bh |
7:0 | Touch X Position [7:0] | LSB of the Touch Y Position in Pixels |
8.8 interrupt trigger mode
Figure 10. Interrupt trigger mode timing

9. Touch screen panel specification
9.1. Electrical characteristics
9.1.1. Capacitive touch panel
DESCRIPTION | SPECIFICATION | |
Operating Voltage | DC 2.8~3.3V | |
Power Consumption (IDD) | Active Mode | 10~18mA |
Sleep Mode | 30~50μA | |
Interface | I2C | |
Linearity | <1.5% | |
Controller | FT5446 | |
I2C address | 0x38 (7-bit address) | |
Resolution | 1280*768 |
9.1.2. Resistive touch panel
ITEM | VALUE | UNIT | REMARK | ||
Min. | Typ. | Max. | |||
Linearity | -3.0 | – | 3.0 | % | Analog X and Y directions |
Terminal Resistance | 400 | – | 1050 | Ω | X |
100 | – | 450 | Ω | Y | |
Insulation Resistance | – | – | – | MΩ | DC 25V |
Voltage | – | – | 10 | V | DC |
Chattering | – | – | 10 | ms | 100kΩ pull-up |
Transparency | 80 | – | – | % | JIS K7105 |
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
9.2. Mechanical characteristic
9.2.1. Capacitive touch panel
DESCRIPTION | INL SPECIFICATION | REMARK |
Touch Panel Size | 4.3 inch | |
Outline Dimension (OD) | 103.1mm x 65.4mm | Cover Lens Outline |
Outline Dimension (OD) – UxTouch | 120.38mm x 79.20mm | Cover Lens Outline |
Product Thickness | 1.7mm | |
Glass Thickness | 0.7mm | |
Ink View Area | 97.0mm x 55.5mm | |
Sensor Active Area | 97.4mm x 56.4mm | |
Input Method | 5 Finger | |
Activation Force | Touch | |
Surface Hardness | ≥7H |
9.2.2. Resistive touch panel
ITEM | VALUE | UNIT | REMARK | ||
Min. | Typ. | Max. | |||
Activation Force | 30 | – | – | 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.
10. Inspection
Standard acceptance/rejection criteria for TFT module.
10.1. 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°

10.2 Inspection standard
Item | Criterion | ||||||||||||||||||||||||||||||||||||
Black spots, white spots, light leakage, Foreign Particle (round Type) |
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LCD black spots, white spots, light leakage (line Type) |
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Item | Criterion | ||||||||||||||||||||||||
Clear spots |
*Spots density: 10 mm |
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Polarizer bubbles |
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Electrical Dot Defect |
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Item | Criterion | ||||||||||||||||||||||||||||||||
Touch panel spot |
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Touch panel White Line Scratch |
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11. Reliability test
NO. | TEST ITEM | TEST CONDITION |
1 | High Temperature Storage | 80±2°C/240hours |
2 | Low Temperature Storage | -30±2°C/240hours |
3 | High Temperature Operating | 70±2°C/240hours |
4 | Low Temperature Operating | -20±2°C/240hours |
5 |
Temperature Cycle | -30±2°C~25~80±2°C × 20 cycles
(30min.) (5min.) (30min.) |
6 | Damp Proof Test | 60°C ±5°C × 90%RH/240hours |
7 | Vibration Test | Frequency 10Hz~55Hz
Amplitude of vibration : 1.5mm Sweep: 10Hz~55Hz~10Hz 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 time |
