Display Modules - LCD, OLED, Graphic

Part Number	Description / PDF	Quantity
DFR0678 DFRobot	7 800X480 TFT DSI CAPACITIVE TOU	0
DFR0650 DFRobot	MONOCHROME 0.96" 128X64 I2C/SPI	27
DFR0091 DFRobot	3-WIRE SERIAL LCD MODULE (ARDUIN	0
DFR0529 DFRobot	2.2"TFT LCD DISPLAY V1.0	61
DFR0669 DFRobot	3.5 480X320 TFT LCD CAPACITIVE T	0
DFR0647 DFRobot	MONOCHROME 0.91" 128X32 I2C OLED	0
DFR0648 DFRobot	MONOCHROME 0.91" 128X32 I2C OLED	0
DFR0506 DFRobot	7'' HDMI DISPLAY WITH CAPACITIVE	0
DFR0664 DFRobot	2.0 320X240 IPS TFT LCD DI	41
DFR0524 DFRobot	5.5 1920X1080 MINI-HDMI OL	2
DFR0649 DFRobot	1.54 240X240 IPS TFT LCD D	44
FIT0476 DFRobot	10.1 DIAGONAL - 1280X800 I	0
FIT0551 DFRobot	DISPLAY TFT TOUCH COLOR 7"	36
DFR0665 DFRobot	2.8 320X240 IPS TFT LCD TOUCHSCR	0
DFR0615 DFRobot	10.1 800X1280 MINI-HDMI IP	0
DFR0369 DFRobot	4.3 INCH E-PAPER 800X600	9
DFR0698 DFRobot	12.5 4K IPS TOUCH DISPLAY(	30
DFR0658 DFRobot	8.9" 1920X1200 IPS TOUCH DISPLAY	7
DFR0550 DFRobot	5'' 800X480 TFT RASPBERRY PI DSI	81
DFR0275 DFRobot	2.8" USB TFT TOUCH DISPLAY SCREE	0

Display Modules - LCD, OLED, Graphic

1. Overview

Optoelectronics display modules are electro-optical devices that convert digital signals into visual information. LCD (Liquid Crystal Display), OLED (Organic Light-Emitting Diode), and Graphic modules represent three core technologies in modern display systems. These modules enable human-machine interaction in applications ranging from consumer electronics to industrial automation, with advancements driving thinner form factors, lower power consumption, and higher visual fidelity.

2. Major Types and Functional Classification

Type	Functional Features	Application Examples
LCD	Backlit liquid crystal layer, requires polarizers, moderate power consumption	Smartphones, TVs, automotive dashboards
OLED	Self-emissive organic materials, infinite contrast ratio, flexible variants	Smartwatches, VR headsets, premium smartphones
Graphic	Fixed pixel matrix for icons/symbols, low resolution but high reliability	Industrial equipment, medical devices, vending machines

3. Structure and Components

LCD: Composed of backlight unit (LED/CCFL), liquid crystal layer, color filters, and TFT (Thin-Film Transistor) array. Polarizing films on both sides control light transmission.

OLED: Contains anode/cathode layers with organic emissive materials (small molecules or polymers) sandwiched between. Utilizes encapsulation layers to prevent moisture damage.

Graphic Modules: Simplified structure with segmented electrodes and passive matrix addressing, often using monochrome STN (Super-Twisted Nematic) technology.

4. Key Technical Specifications

Parameter	Description	Importance
Resolution (ppi)	Pixels per inch determining image sharpness	Higher values provide clearer visuals
Luminance (cd/m )	Brightness level sustainability	Impacts outdoor visibility
Response Time (ms)	Pixel switching speed	Prevents motion blur in dynamic content
Operating Temperature ( C)	Functional temperature range	Determines environmental adaptability
Lifespan (hours)	Half-brightness duration	100,000 for LCD, 50,000 for OLED

5. Application Areas

Consumer Electronics: Smartphones (OLED), tablets (LCD)
Medical Equipment: Diagnostic monitors (LCD), portable devices (Graphic)
Automotive: Instrument clusters (OLED), infotainment systems (LCD)
Industrial HMI: Control panels (Graphic), automation systems (LCD)
AR/VR: High-speed OLED microdisplays

6. Leading Manufacturers & Products

Manufacturer	Type	Representative Product
Samsung Display	OLED	AMOLED for Galaxy smartphones
LG Display	LCD	IPS panels for Apple iPad Pro
Sharp	Graphic	LS013B7DH01 memory LCD
BOE Technology	All Types	10.7" flexible AMOLED for wearables

7. Selection Guidelines

Consider these factors for optimal selection:

Application Scenario: Outdoor use requires high brightness ( 1000 cd/m )
Power Budget: OLED consumes 30% less power than equivalent LCD in dark content
Environmental Conditions: Industrial-grade (-30 C to +85 C) for automotive systems
Cost Constraints: Graphic modules cost 40-60% less than color TFT LCDs
Integration Complexity: OLED requires built-in compensation circuits for aging effects

Case Study: A smartwatch design selected 1.4" AMOLED module for its 1000:1 contrast ratio and 0.1mm ultra-thin profile despite higher cost.

8. Industry Trends

Key development directions include:

Micro-LED adoption for >3000 cd/m brightness and sub-10 m pixel pitch
Rollable OLED with improved encapsulation technology
AI-driven display compensation algorithms for uniformity enhancement
Low-temperature polycrystalline oxide (LTPO) backplanes for dynamic refresh rates
Biodegradable substrate materials for eco-friendly modules