1.14 Inch Round LCD Display

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Basic Info

Payment Type:	T/T

Product Description

LCD (Liquid Crystal Display) is a type of flat panel display which uses liquid crystals in its primary form of operation. LEDs have a large and varying set of use cases for consumers and businesses, as they can be commonly found in smartphones, televisions, computer monitors and instrument panels. A liquid crystal display or LCD draws its definition from its name itself. It is a combination of two states of matter, the solid and the liquid. LCD uses a liquid crystal to produce a visible image. Liquid crystal displays are super-thin technology display screens that are generally used in laptop computer screens, TVs, cell phones, and portable video games.

1. Introduction

1.1 Scope of application

This specification applies to the LCD module that is supplied by TIAN XIAN WEI TECHNOLOGY CO., LTD.

LCD specification: Dots 135xRGBx240

As to basic specification of the driver IC, refer to the IC (Sitronix:ST7789V2) specification and data book.

All material & processing of the LCD module should be Lead Free.

1.2 TFT features:

Structure: TFT PANNEL+IC +FPC+BL; IPS Type LCD

135 dot-segment and 240 dot-common outputs; 65K Color can be selected by software;

White LED back light;

4-line Seria interface

1.3 Applications:

2. LCM General specification

ITEM	Sandard value	Unit
LCD Type	Normally Black	--
Drive element	TFT active matrix	--
Number of pixels	135*3RGB(H)X240 (V)	Dots
Pixel arrangement	RGB Vertical stripe	--
Pixel Pitch (H*V)	0.1101(H) x0.1038 (V)	mm
Active area	14.86(H) x 24.91(V)	mm
Module Size(WHT)	17.60(W)x31.00(H)x1.61(T)	mm
Viewing direction	ALL O’CLOCK
TFT Driver IC	ST7789V2	-
TFT interface	4-line Seria Interface	-
Approx. Weight	TBD	g
Touch structure
Touch Driver IC		-
Touch Interface

3. VIEWING DIRECTION: ALL

4. DRIVER IC:ST7789V2

5. LCM (White 9 AVG 1/9) : Brightness: TBDcd/m2 (TYP) Uniformity:80%(MIN)

6. BACK LIGHT: 1 chip white LEDs If=20mA,Vf=2.8V-3.2V

7. OPERATING TEMP: -10°C TO 60°C,STORAGE TEMP: -20°C TO 70°C

8. * Critical Parameter,( ) ref Parameter,[ ] cpk Parameter Unspecified Tolerances:±0.20mm

Modification mark:

LEDA

LEDK

SUGGESTION:TP window size unilaterl increase 0.3~0.5mm than LCM A.A 10.REQUIREMENTS ENVIRONMENTAL PROTECTION: RoHS

3. Absolute Maximum Rating

Characteristics	Symbol	Min.	Max.	Unit
LCM Operating Temperature	TOPR	-20	+60	°C
LCM Storage Temperature	TSTG	-30	+70	°C
Humidity	RH	-	90	%

4. Electrical Characteristics

4.1 TFT DC Characteristics

Characteristics	Symbol	Min.	Typ.	Max.	Unit
Supply Voltage for I/O	VDDIO	--	--	--	V
Supply Voltage for(DC/DC)	VDD	2.7	2.8	3.3	V
Supply Voltage for(DC/DC)	AVDD				V
Supply Voltage for(DC/DC)	AVEE				V

4.2 Back-Light Unit Characeristics

The back-light system is an edge-lighting type with 1 white LEDs. The characteristics of the back-light are shown in the following tables.

Characteristics	Symbol	Min.	Type	Max.	Unit	Notes
Forward Voltage	V_F	2.8	-	3.2	V	-
Forward current	I_F	--	20	-	mA	-
Luminance(With LCD)	Lv		TBD	--	cd/m²	-
LED life time	N/A	----	30,000	--	Hr	Note 1

Note:

(1) The “LED life time” is defined as the module brightness decrease to 50% of original brightness at I_L=20mA/LED. The LED life time could be decreased if operating I_L is larger than 25mA/LED.

Backlight circuit diagram shown in below:

5. Module Function Description

5.1 LCM Pin Descriptions

SDA

input/output signal pin

SCL

Synchronous clock signal pin

Display data/command selection pin

RESET

Reset signal input terminal. Active at ‘L’.

Chip select signal input pin

GND

Gound

VDD

PINPOWER SUPPLY（2.8-3.3V）

LEDK

Power supply for backlight cathode input terminal.

LEDA

Power supply for backlight anode input terminal.

GND

Gound

6. Timing Characteristics

7.2 Measuring Condition

■ Measuring surrounding : dark room

■ Ambient temperature : 25±2_oC

■ 15min. warm-up time.

7.3 Measuring Equipment

FPM520 of Westar Display technologies, INC., which utilized SR-3 for Chromaticity and BM-5A for other optical characteristics.

8. Reliability Test Item

No.	Test Item	Test Condition	Notes
1	High Temp. Storage	+70°C / 96H	1. Functional test isOK. Missing Segment,short, unclear segment non-display,display abnormally and liquid crystal leakare un-allowed. 2. No low temperature bubbles,end seal loose andfall, frame rainbow.
2	Low Temp. Storage	-30°C / 96H
3	High Tempe. Operating	+60°C / 96H
4	Low Tempe. Operating	-20°C / 96H
5	High Temperature /Humidity storage	50°C x 90%RH /96H
6	Thermal and cold shock	Static state， -20℃（30min） ~60℃ （30min），50 cycles

9. Packing Method TBD

- END -

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