1.54 Inch LCD Display

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Basic Info

Payment Type:	T/T

Product Description

A thin-film-transistor liquid-crystal display (TFT LCD) is a variant of a liquid-crystal display (LCD) that uses thin-film-transistor (TFT) technology to improve image qualities such as addressability and contrast. A TFT LCD is an active matrix LCD, in contrast to passive matrix LCDs or simple, direct-driven[clarification needed] LCDs with a few segments.

TFT LCDs are used in appliances including television sets, computer monitors, mobile phones, handheld devices, video game systems, personal digital assistants, navigation systems, projectors, and car dashboards.

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 240xRGBx240

As to basic specification of the driver IC, refer to the IC (Sitronix:ST7789V)

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

240 dot-segment and 240 dot-common outputs;

65K Color can be selected by software;

White LED back light;

MCU-8bit interface

1.3 Applications:

Pos

Pda

Electronic cigarettes

Law enforcement equipment,

walkie-talkie,

household appliances

2. LCM General specification

ITEM	Sandard value	Unit
LCD Type	Normally black	--
Drive element	TFT active matrix	--
Number of pixels	240*3RGB(H)X240 (V)	Dots
Pixel arrangement	RGB stripe	--
Pixel Pitch (W*H)	0.153(H) x0.153 (V)	mm
Active area	27.72(H) x 27.72(V)	mm
Module Size(WHT)	31.52(H) x33.72(V) x 2.03(D)	-
Viewing direction	ALL O’CLOCK
TFT Driver IC	ST7789V	-
TFT interface	MCU_8BIT Interface	-
Approx. Weight	TBD	g

3.Absolute Maximum Rating

Characteristics	Symbol	Min.	Max.	Unit
LCM Operating Temperature	T_OPR	-20	+70	°C
LCM Storage Temperature	T_STG	-30	+80	°C
TP Operating Temperature & Humidity(20% ~ 90%RH)	T_OPR			°C
TP SStorage Temperature & Humidity(20% ~ 90%RH)	T_STG			°C
Humidity	RH	-	90	%

4.Electrical Characteristics

4.1 TFT DC Characteristics

Characteristics	Symbol	Min.	Typ.	Max.	Unit
Supply Voltage for I/O	VDDIO	1.65	1.8	3.3	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
Current Consumption	I_DD	-	TBD	-	mA
Current Consumption	I_DD-SLEEP		TBD		uA

4.2Back-Light Unit Characeristics

The back-light system is an edge-lighting type with 3 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	2.9	-	3.2	V	-
Forward current	I_F	45		60	mA	-
Luminance(With LCD)	Lv		450		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

Pin No.	Symbol	Description
1	LEDA	BACKLIGHT +
2	LEDK	BACKLIGHT-
3	VCI	POWER SUPPLY（2.8V）
4	IOVCC	DIGITAL VOLTAGE.( 1.8V/2.8v)
5	GND	GROUND
6	RESET	Hardware reset
7	CS	Chip select
8	RS	Register select input pin
9	WR	Write enable clock input pin
10	RD	Read enable clock input pin
11	GND	GROUND
12-20	DB0~ DB7	Parallel data I/O.

6. Timing Characteristics

7.Optical Characteristics

Items		Symbol	Condition	Specifications			Unit	All left side data are based on TIAN XIAN WEI product reference only
Items		Symbol	Condition	Min.	Typ.	Max.	Unit
Contrast Ratio		CR		640	800	-	-
Response Time		TB_R_B		-	16	21	ms
Response Time		TB_F_B		-	19	24	ms
Chromaticity	Red	XB_R_B			/		-
	Red	YB_R_B			/		-
	Green	XB_G_B			/		-
	Green	YB_G_B			/		-
	Blue	XB_B_B			/		-
	Blue	YB_B_B			/		-
	White	XB_W_B		0.28	0.31	0.34	-
	White	YB_W_B		0.29	0.32	0.35	-
Viewing angle	Hor.	f1(3 o’clock)	Center CR≥10	-	80	-	deg.
	Hor.	f2(9 o’clock)		-	80	-
	Ver.	q2(12 o’clock)		-	80	-
	Ver.	q1(6 o’clock)		-	80	-
Uniformity					---		%

Note 1: Definition of Contrast Ratio (CR):

The contrast ratio can be calculated by the following expression.

Contrast Ratio (CR) = L63 / L0

L63: Luminance of gray level 63

L0: Luminance of gray level 0

CR = CR (10)

CR (X) is corresponding to the Contrast Ratio of the point X at Figure in Note 5.

Note 2: Definition of Response Time (TR, TF):

Note 3: Viewing Angle

The above “Viewing Angle” is the measuring position with Largest Contrast Ratio; not for good

image quality. View Direction for good image quality is 6 O’clock. Module maker can increase

the “Viewing Angle” by applying Wide View Film.

Note 4: Measurement Set-Up:

The LCD module should be stabilized at a given temperature for 20 minutes to avoid abrupt

temperature change during measuring. In order to stabilize the luminance, the measurement

should be executed after lighting Backlight for 20 minutes in a windless room.

8. Reliability Test Item

No.	Test Item	Test Condition	Notes
1	High Temp. Storage	+80°C / 240H	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. 1. Function test is OK. 2. No glass crack,chipped glass, endseal loose and fall, epoxy frame crackand so on. 3. No structure loose and fall
2	Low Temp. Storage	-30°C / 240H
3	High Tempe. Operating	+70°C / 240H
4	Low Tempe. Operating	-20°C / 240H
5	High Temperature /Humidity storage	50+5°C x 90%RH / 48H
6	Thermal and cold shock	Static state， -30℃（1 hour） ~80℃ （1 hour） ~ -30℃（1 hour），packaging， 10 cycles
7	Vibration Test	Frequency: 10Hz~55Hz Amplitude:1.0mm, 2 hours for each direction of X, Y
8	Dropping test	Pack products into the carton box.Drop it from 80cm height to ground.Once for each side of the carton