Sustainable Spatial Typography: Designing, Implementing, and Evaluating Urban Micro-Display Interfaces

Thesis Abstract

This study investigates how sustainable spatial typography can be designed, implemented, and evaluated within urban micro-display interfaces to enhance wayfinding, readability, and civic engagement while reducing visual clutter and energy consumption in dense city environments. The problem addressed is the fragmentation of typographic legibility and semantic clarity when micro-displays become pervasive in urban spaces, often compromising accessibility, inclusivity, and sustainability. The aim is to develop a design framework and evaluative methodologies that align typographic form with spatial function, device constraints, and environmental considerations. Specific objectives include (1) identifying typographic configurations and spatial placements that optimize legibility and recognition latency across diverse urban pedestrians, (2) prototyping a scalable micro-display system—comprising acrylic-foam rails, LED micro-tiles, and solar-assisted power modules—coupled with a responsive typographic grammar, (3) evaluating the interfaces through a mixed-methods protocol to measure perceptual performance, user experience, and energy efficiency, (4) comparing sustainable typographic strategies against conventional display practices, and (5) articulating guidelines for policy, design practice, and future research. The study adopts an explanatory sequential mixed-methods design rooted in visual communication theory and urban informatics. It begins with a quantitative phase that assesses legibility, reading speed, and cognitive load among 200 participants representing varied ages and languages, using standardized symbol-to-text mapping tasks and controlled lighting conditions. Data collection employs eye-tracking, heart-rate variability, and NASA-TLX for cognitive load, with statistical analyses including multivariate analysis of variance (MANOVA) to examine effects of type size, contrast, and display material on performance metrics. A qualitative phase follows, consisting of 40 semi-structured interviews and 8 focus groups with urban designers, municipal stakeholders, and pedestrians, analyzed via thematic analysis to surface contextual factors, aesthetic preferences, and perceived sustainability. Triangulation integrates findings through a convergent parallel design and validates the results against a simulated urban pilot over 6 weeks in a mid-sized city center. The sampling strategy combines purposive sampling for expert participants and stratified random sampling for public participants, ensuring representation across languages and literacy levels. Instrumentation includes a custom typographic grammar model encoding variables such as font family, stroke width, tracking, line length, color temperature, motion, and dwell time, operationalized into a Digital Urban Typography Simulator (DUTS) and a field-ready micro-display prototype. Validity and reliability are established through pilot testing (n=30) with test-retest procedures, Cronbach’s alpha for survey scales, and inter-rater reliability for qualitative coding (Cohen’s kappa > 0.80). Data analysis employs regression analysis to quantify relationships between typographic variables and legibility outcomes, path analysis to explore mediation by cognitive load, and ANOVA to compare material configurations. For qualitative data, thematic analysis follows Braun and Clarke’s approach, with coding validated by expert auditor review. Expected findings indicate that spatial typography designed for micro-displays with constrained viewing angles and ambient-light variability improves objective legibility by 18–24% and reduces cognitive load by 12–16% compared with traditional signage typography. Results are anticipated to show that sustainability-focused design choices—lower contrast materials, energy-efficient illumination profiles, and modular typographic units—yield measurable energy savings of 20–35% across urban installations. The study will identify interactions among typographic attributes, spatial depth cues, and pedestrian behavior, revealing that readability benefits are maximized when typography aligns with wayfinding tasks and pedestrian flow patterns. Theoretical contributions integrate the Cognitive Load Theory with Semiotic and Ecological Design frameworks, proposing a Spatial Typography Sustainability Model that links materiality, typography, and urban ecology. The study contributes to knowledge by (1) offering a replicable design framework for sustainable urban micro-typography, (2) providing empirical evidence on how typographic variables influence performance and experience in real-world urban contexts, and (3) delivering actionable guidelines for designers, city authorities, and technology vendors to harmonize readability, accessibility, and energy efficiency. The main conclusion posits that context-aware, environmentally conscious typographic systems embedded in micro-displays can enhance urban navigation and public engagement without compromising sustainability. Recommendations include integrating the framework into city branding strategies, adopting standardized metrics for urban typography efficacy, and pursuing longitudinal studies to assess long-term behavioral and environmental impacts.