Differences

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--- intro_screen [2025/11/27 09:28] – louise
+++ intro_screen [2026/04/02 16:23] (current) – [Screen] lucas.burlot.ext
@@ Line 1: / Line 1: @@
 # Screen
+## System Definition - Goal and scope
-## Introduction
-### System definition
 A screen is an electronic device designed to render visual content, by displaying electronic images. It is composed of pixels, which light up to create the image.
+### Definition
-### What is it used for?
+#### What is it used for?
 * Render visual content, by displaying electronic images
 * Used for laptop, tablet, smartphone, computer monitor, television
-### Are they different types and technologies?
+#### Are they different types and technologies?
 Technologies:
@@ Line 20: / Line 17: @@
 * LCD = Liquid Crystal Displays
 * LED = Light-Emitting Diode
-* OLED = Organic Light-Emitting Diode
+* [[intro_OLED|OLED]] = Organic Light-Emitting Diode
+* e-paper
+* plasma
+* SED = Surface-conduction Electron emitter Display
-Can be touche sensitive or not
+Can be touch-sensitive or not, flexible or rigid, transparent or not.
+{{:capture_d_ecran_2026-04-01_090428.png?direct&400|}}
+main panel types
-## Life Cycle
+#### If different types, what are the differences in terms of materials, process, use consumption?
+* LCD screen: they have a backlight, a TFT (thin film transistor) matrix, liquid crysals, poliraziers
+* [[intro_oled|OLED screens]]: no backlight needed, TFT matrix is optional, emissive materials are organic
+* e-paper: TBC
+#### Is there a generic component that represents a family of components?
+TBC
+#### How many sub-parts does the system consist of?
+TBC
+### Perimeter
+#### What is included?
+TBC
+#### What is excluded?
+TBC
+### Functional unit and reference flows
+#### What is the functional unit?
+TBC
+#### What are the reference flows?
+TBC
+## Life Cycle - Inventory
+=> Goal: Define state of the art on life cycle stages to be considered.
+### Database and tools
+#### What are the already existing data (dataset, parametric model, paper, etc.)?
+Ecoinvent dataset, Negaoctet dataset, draft of parametric in Léa Bitard's Master thesis (Resilio)
+### Raw materials
+=> Goal: List the technical information needed for the LCI.
+#### What is it made of?
+#### Who are the main mining? Where are they located?
+#### Is there mining processes information available?
 ### Manufacturing
+=> Goal: List the technical information needed for the LCI.
-* Materials
+  * [[screen_manufacturing|Manufacturing processes of screens]]
-* Processes
-* Main manufacturers, location
-### Distribution
+For each system sub-part:
+#### What are the manufacturing processes?
+#### What are the assembly processes?
+#### For each process, what is the energy consumption?
+#### For each process, what are the inputs (water, chemicals, etc.) ?
+#### For each process, what is the yield? Are they co-products and/or losses?
-### End of life
+#### How the “main” manufacturers can be characterized: by the number of components manufactured, the market share (€), other?
+#### Who are the main manufacturers? Where are they located?
+### Distribution and packaging
+=> Goal: List the technical information needed for the LCI.
+#### What are the packaging? Made of which materials?
+#### Which are the transport modes?
+#### What are the transport distances?
-## Environmental footprint
+### Use
+=> Goal: List the technical information needed for the LCI.
-### What are the main environmental impacts associated to the materials?
+#### What is the service lifespan? (durée d'utilisation)
+#### Is there a reparation factor?
+#### Is there sub-parts replacement?
-TBC
+#### Where is it used?
+#### Who are the users?
+#### Which + how much energy does it need?
+#### Is there emissions from use?
-### What are the main environmental impacts associated to the manufacturing processes?
+### End of life
+=> Goal: List the technical information needed for the LCI.
-TBC
+#### What is the lifetime? (durée de vie)
+#### Is it different from lifespan and why?
+#### Is it refurbished? + Where?
+#### Is it recyclable? Can it be dismantled? Which material can be separated? + Where and how?
+#### Is it incinerated with energy recovery? Just incinerated? Buried? + Where?
+#### Which part of waste can be considered as mismanaged (neither recycled, nor incinerated, nor buried)?
+## Environmental assessment
+=> Goal: Define state of the art on environmental impacts.
+### What are the impact assessment methods used (EF, ReCiPe, others)?
+### What are the known environmental impacts associated to the system (indicators)?
+### What are the known hotspots? Which raw material? Which life stage?
 ### What are the potential parameters affecting environmental impact?
@@ Line 55: / Line 125: @@
 * diagonal lenght
-### Already existing data? (dataset, parametric model, paper, etc.)
+### What are the main source of uncertainty?
+## Bibliography
+=> Goal: Source every data we cited previously
+### List of our sources
+### Data origin: bibliographic source / consortium hypothesis / expert opinion - required if a Data Quality Rating (DQR) must be completed
-Ecoinvent dataset, Negaoctet dataset, draft of parametric in Léa Bitard's Master thesis (Resilio)
-##  Next steps
+## Next steps
+=> Goal: List challenges and clarify priority areas for action
 ### What do we know we don't know?