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RGB 4.3″

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.

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Rev.1.0
2019-06-07

ITEMCONTENTSUNIT
LCD TypeTFT/Transmissive/Normally white/
Size4.3Inch
Viewing Direction12:00 (without image inversion)O’ Clock
Gray Scale Inversion Direction6:00O’ Clock
Number of Dots480 x (RGB) × 272/
Driver ICHX8257A/
Interface Type24bit RGB/
Brightnessno touch module550cd/m2
CTP module500
RTP module440
Color Depth16.7M/
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

RVT4.3xxTxWx0x
1.2.3.4.5.6.7.8.9.10.
1.BRANDRV – Riverdi
2.PRODUCT TYPET – TFT Standard
3.DISPLAY SIZE43 – 4.3”
4.MODEL SERIAL NO.x (A-Z)

U – UxTouch

5.RESOLUTION480272 – 480×272 px

L – 480×272 px

6.INTERFACET– LCD TFT
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.VERSION0x (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:

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:

BLACKWHITE

Product options:

PART NUMBERDESCRIPTION
RVT43ULTNWC00RGB, CTP uxTouch, black cover glass, 0.2mm DST
RVT43ULTNWC01RGB, CTP uxTouch, black cover glass, 0.5 mm DST
RVT43ULTNWC02RGB, CTP uxTouch, black cover glass, no DST
RVT43ULTNWC03RGB, CTP uxTouch, white cover glass, 0.2mm DST
RVT43ULTNWC04RGB, CTP uxTouch, white cover glass, 0.5 mm DST
RVT43ULTNWC05RGB, 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

3. Drawings

4. Absolute maximum ratings

PARAMETERSYMBOLMINMAXUNIT
Supply Voltage for LCD LogicVDD-0.34.5V
Supply Voltage for CTP LogicVDD-VSS-0.33.6V
Input Voltage for LogicVINVSS-0.5VDDV
Operating TemperatureTOP-2070°C
Storage TemperatureTST-3080°C
HumidityRH90% (Max 60°C)RH
LED forward current (each LED)IF25mA

5. Electrical characteristics

PARAMETERSYMBOLMINTYPMAXUNITNOTES
Supply Voltage For ModuleVDD3.03.33.6V
Input Current IDD19.5mAVDD=3.3V
Input Voltage ‘H’ levelVih0.7VDDVDDV
Input Voltage ‘L’ levelVilVSS0.3VDDV
Voltage for LED backlightVl151617V
Current for LED backlightIL40mA
LED Life Time3000050000HrsNote1

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

ITEMSYMBOLCONDITIONMINTYPMAXUNITREMARKNOTE
Response TimeTr+Tf
θ=0°
∅=0°
Ta=25
2030msFigure 44
Contrast RatioCr320400Figure 51
Luminance Uniformityδ WHITE80%Figure 53
Surface Luminance
TFT
Lv
440550
cd/m2
Figure 5
2
TFT+CTP400500
TFT+RTP350440
Viewing Angle Range
θ
∅ = 90°3550degFigure 6
6
∅ = 270°5570degFigure 6
∅ = 0°5570degFigure 6
∅ = 180°5570degFigure 6
CIE (x, y)
Chromaticity
Red
x
θ=0°
∅=0°
Ta=25
0.5700.6200.670
Figure 6
5
y0.2940.3440.394
Green
x0.2560.3060.356
y0.5130.5630.613
Blue
x0.0830.1330.183
y0.0990.1490.199
White
x0.2500.3000.350
y0.2800.3300.380

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.SYMBOLDESCRIPTIONNOTE
1VLED-Cathode Of LED Backlight 
2VLED+Anode Of LED Backlight 
3GNDPower Ground 
4VDDPower Voltage 
5-12R0-R7Red Data (R0-LSB, R7-MSB) 
13-20G0-G7Green Data (G0-LSB, G7-MSB) 
21-28B0-B7Blue Data (B0-LSB, B7-MSB) 
29GNDPower Ground 
30DCLKPixel Clock 
31DISPDisplay On/Off 
32HSYNCHorizontal Sync Signal 
33VSYNCVertical Sync Signal 
34DEData Enable 
35NCNo Connect 
36GNDPower Ground 
37NCNo Connect 
38NCNo Connect 
39NCNo Connect 
40NCNo 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.SYMBOLDESCRIPTIONREMARK
1VssPower Ground 
2VddPower For CTP 
3SCLI2C SCL 
4NC 
5SDAI2C SDA 
6NC 
7/RSTReset pin 
8NC 
9/INTInterrupt signal from CTP 
10VSSPower 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

PARAMETERSYMBOLMINTYPMAXUNIT
DCLK FrequencyFclk5912MHz
VSD Period TimeTv277288400H
VSD Display AreaTvd272H
VSD Back PorchTvb3831H
VSD Front PorchTvfp2897H
HSD Period TimeTh520525800DCLK
HSD Display AreaThd480DCLK
HSD Back PorchThbp3640255DCLK
HSD Front PorchThfp4565DCLK

8.3. CTP interface timing characteristics

PARAMETERMINMAXUNIT
SCL Frequency0400kHz
Bus Free Time Between a STOP and START Condition4.7/μs
Hold Time (repeated) START Condition4.0/μs
Data Setup Time250/ns
Setup Time for Repeated START Condition4.7/μs
Setup Time for STOP Condition4.0/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

ADDRESSNAMEBIT7BIT6BIT5BIT4BIT3BIT2BIT1BIT0HOST ACCESS
00hDEVIDE_MODEDevice Mode[2:0]RW
01hGEST_IDGesture ID[7:0]R
02hTD_STATUSNumber of touch points[3:0]R
03hTOUCH1_XH1st Event Flag1st Touch X Position[11:8]R
04hTOUCH1_XL1st Touch X Position[7:0]R
05hTOUCH1_YH1st Touch ID[3:0]1st Touch X Position[11:8]R
06hTOUCH1_YL1st Touch Y Position[7:0]R
07hR
08hR
09hTOUCH2_XH2nd Event Flag2nd Touch X Position[11:8]R
0AhTOUCH2_XL2nd Touch X Position[7:0]R
0BhTOUCH2_YH2nd Touch ID[3:0]2nd Touch X Position[11:8]R
0ChTOUCH2_YL2nd Touch Y Position[7:0]R
0DhR
0EhR
0FhTOUCH3_XH3rd Event Flag3rd Touch X Position[11:8]R
10hTOUCH3_XL3rd Touch X Position[7:0]R
11hTOUCH3_YH3rd Touch ID[3:0]3rd Touch X Position[11:8]R
12hTOUCH3_YL3rd Touch Y Position[7:0]R
13hR
14hR
15hTOUCH4_XH4th Event Flag4th Touch X Position[11:8]R
16hTOUCH4_XL4th Touch X Position[7:0]R
17hTOUCH4_YH4th Touch ID[3:0]4th Touch X Position[11:8]R
18hTOUCH4_YL4th Touch Y Position[7:0]R
19hR
1AhR
1BhTOUCH5_XH5th Event Flag5th Touch X Position[11:8]R
1ChTOUCH5_XL5th Touch X Position[7:0]R
1DhTOUCH5_YH5th Touch ID[3:0]5th Touch X Position[11:8]R
1EhTOUCH5_YL5th 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.

ADRESSBIT ADRESSREGISTER NAMEDESCRIPTION
00h6:4Device Mode [2:0]000b Work Mode

100b Factory Mode – Read Raw Data

GEST_ID

This register describes the gesture of a valid touch.

ADRESSBIT ADRESSREGISTER NAMEDESCRIPTION
01h7:0Gesture 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.

ADRESSBIT ADRESSREGISTER NAMEDESCRIPTION
02h3:0Number 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.

ADRESSBIT ADRESSREGISTER NAMEDESCRIPTION
03h

~

39h

7:6Event Flag00b: Put Down

01b: Put Up

10b: Contact

11b: Reserved

5:4 Reserved
3:0Touch 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.

ADRESSBIT ADRESSREGISTER NAMEDESCRIPTION
04h

~

3Ah

7:0Touch 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.

ADRESSBIT ADRESSREGISTER NAMEDESCRIPTION
05h

~

3Bh

7:4Touch ID[3:0]Touch ID of Touch Point
3:0Touch 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.

ADRESSBIT ADRESSREGISTER NAMEDESCRIPTION
05h

~

3Bh

7:0Touch 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

DESCRIPTIONSPECIFICATION
Operating VoltageDC 2.8~3.3V
Power Consumption (IDD)Active Mode10~18mA
Sleep Mode30~50μA
InterfaceI2C
Linearity<1.5%
ControllerFT5446
I2C address0x38 (7-bit address)
Resolution1280*768

9.1.2. Resistive touch panel

ITEMVALUEUNITREMARK
Min.Typ.Max.
Linearity-3.03.0%Analog X and Y directions
Terminal Resistance4001050X
100450Y
Insulation ResistanceMΩDC 25V
Voltage10VDC
Chattering10ms100kΩ pull-up
Transparency80%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

DESCRIPTIONINL SPECIFICATIONREMARK
Touch Panel Size4.3 inch 
Outline Dimension (OD)103.1mm x 65.4mmCover Lens Outline
Outline Dimension (OD) – UxTouch120.38mm x 79.20mmCover Lens Outline
Product Thickness1.7mm 
Glass Thickness0.7mm 
Ink View Area97.0mm x 55.5mm 
Sensor Active Area97.4mm x 56.4mm 
Input Method5 Finger 
Activation ForceTouch 
Surface Hardness≥7H 

9.2.2. Resistive touch panel

ITEMVALUEUNITREMARK
Min.Typ.Max.
Activation Force30gfNote 1
Durability – Surface ScratchingWrite 100,000charactersNote 2
Durability-Surface Pitting1,000,000touchesNote 3
Surface Hardness3HJIS 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

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

11. Reliability test

NO.TEST ITEMTEST CONDITION
1High Temperature Storage80±2°C/240hours
2Low Temperature Storage-30±2°C/240hours
3High Temperature Operating70±2°C/240hours
4Low Temperature Operating-20±2°C/240hours
 

5

Temperature Cycle-30±2°C~25~80±2°C × 20 cycles

(30min.) (5min.)    (30min.)

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

Amplitude of vibration : 1.5mm

Sweep: 10Hz~55Hz~10Hz

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 time

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