Decomposition of Invention Impact

The impact of an invention cannot be captured by a single metric. It can be decomposed into at least the following layers.

・Adoption scale
・Performance improvement
・Scope of diffusion
・Structural change

Among these, the decisive factor is structural change. The presence or absence of this separates the hierarchy of inventions.

What is Structural Change

Not the efficiency improvement of existing activities,
but a change in the conditions that make the activities themselves possible

This applies when the premises of time, space, institutions, or infrastructure change

Positioning of the Light Bulb

Thomas Edison

The light bulb is not merely a lighting device, but closer to a system that redefines time.

・Establishment of nighttime activity
・Extension of factory operating hours
・Continuous operation of cities
・Formation of power grids

The important point here is not the efficiency of light,
but the disappearance of the constraint of darkness

Quantitative Characteristics

Adoption scale: global infrastructure
Performance improvement: darkness → visibility (not a continuous variable)
Scope of diffusion: entire industry
Structural change: maximum

Closer to creation than improvement
Demand is generated from zero

Positioning of LED

Light-emitting diode

LEDs are established on the premise of an existing light-based society.

・Reduction in power consumption
・Longer lifespan
・Miniaturization
・Improved controllability

Quantitative Characteristics

Adoption scale: high but later entrant
Performance improvement: 5 to 10 times
Scope of diffusion: lighting, display, communication
Structural change: limited

It affects total energy consumption,
but does not redefine the structure of daily life

Structure of Stagnation in Modern Invention

Rather than stagnation, it is closer to a transformation of the search space.

・Core infrastructure is already complete
・Institutional constraints are strong
・Safety requirements are high

As a result, inventions converge into the following.

・Efficiency improvement
・Internal optimization
・Refinement of existing systems

Observed Stagnation

Changes in experience are small
Visible changes are limited
New lifestyles are difficult to emerge

Therefore, it is perceived as stagnation

Supplementary Comparison (Light Bulb vs LED)

Light bulb
・Creation of demand from zero
・Change in temporal structure
・Formation of infrastructure

LED
・Optimization of existing demand
・Energy reduction
・Improved controllability

The two are not in the same category but belong to different hierarchical levels

Sources and References

・Thomas Edison and the Invention of the Light Bulb, U.S. Department of Energy
・International Energy Agency, Lighting Energy Consumption Reports
・Nobel Prize Materials on Semiconductor Light Emitting Diodes
・Nordhaus, W. D. (1996), Do Real-Output and Real-Wage Measures Capture Reality? The History of Lighting Suggests Not