A Preliminary Model of Lighting-Display Interaction

Lloyd, Charles J.; Mizukami, Masahiro; Boyce, P.R.

doi:10.1080/00994480.1996.10748148

Cited by 14 publications

(12 citation statements)

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“…6 image, the effect of ambient light on the display, and the degree to which the display blurs reflected images (a function of screen specularity). 105 The model predicts greater disturbance when there are brighter reflected images, when ambient light reduces contrast, and when the reflected images are sharp. This model awaits independent validation.…”

mentioning

confidence: 98%

Psychological Processes Influencing Lighting Quality

Veitch

2001

Journal of the Illuminating Engineering Society

155

104

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/npsi/ctrl?lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?lang=fr Access and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. Society, 30, 1, pp. 124-140, 2001-04-01 Psychological processes influencing lighting quality Veitch, J. A. Journal of the Illuminating Engineering Psychological processes influencing lighting quality Veitch, J.A.A version of this paper is published in / Une version de ce document se trouve dans :Journal of the Illuminating Engineering Society, v. 30, no. 1, 2001, pp. 124-140 www.nrc.ca/irc/ircpubs NRCC-42469 AbstractVeitch and Newsham proposed a behaviorally-based model for lighting quality research, in which individually-based processes mediate the relationships between luminous conditions and such behavioral outcomes as task performance, mood, social behavior, aesthetic judgements and satisfaction. This review paper summarizes the state of knowledge concerning mediating psychological processes: perceived control, attention, environmental appraisal, and affect. These processes were selected because of their relevance to the explanations often given for lighting design choices.More explicit use of theoretically-driven predictions to guide lighting research would result in greater precision in our comprehension of lighting-behavior relationships to form the foundation of empirically-based lighting recommended practice.Psychology and Lighting Quality / 2 Introduction Surveys of office employees consistently report that lighting is among the more important features of office design and furnishings.1,2 Likewise, in the professional community of lighting designers and illuminating engineers, there is a long history of speculation that the quality of the luminous environment can influence task performance, comfort, and well-being, 3,4 effects that are fundamentally psychological --that is, behavioral, in nature. This paper reviews the relevant literature concerning such effects, in an attempt to provide direction for lighting recommended practice and to further lighting quality research.Stein, Reynolds, and McGuinness once defined lighting quality as "a term used to describe all of the factors in a lighting installation not directly connected with quantity of illumination." (5, p.887) Their definition, although flexible enough to be applied to a wide variety of lit environments, offers little guidance concerning how to measure the quality of a lit environment. Veitch and Newsham proposed that lighting quality exists when the luminous conditions support the behavioral needs of individuals in the lit space.6 This definition has...

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mentioning

confidence: 98%

Psychological Processes Influencing Lighting Quality

Veitch

2001

Journal of the Illuminating Engineering Society

155

104

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“…The specular reflection properties were characterised by specular reflectance, defined by Equation (2). The haze reflection properties of display screens were characterised using the simplified method proposed by Howlett,15 that is, as the ratio between the measured reflected luminance with a large light source (4)).…”

Section: Display Screensmentioning

confidence: 99%

“…Some of these parameters were taken from other studies of the relationship between screen reflections and disturbance. 2,12 The parameters examined included specular reflectance, diffuse reflectance, blur width, effect of haze reflection, foreground luminance, Lighting and display screens 215 background luminance, space-averaged luminance, luminance ratio, luminance contrast, display screen modulation, visual size of the reflected light source and viewing angle from normal. Stepwise regression was used to construct the model.…”

Section: Modelling Maximum Source Luminancesmentioning

confidence: 99%

“…Such reflections are disturbing when they produce a high luminance contrast between the reflected object and the screen background. 1 The magnitude and form of these reflections depends on the reflection properties of the display screens, 2,3 which are characterised by three components; diffuse, specular and haze ( Figure 1). 4 Diffuse reflection occurs when the reflected light is scattered equally in all possible directions; it produces a uniform luminance that decreases the contrast between the displayed material and its background.…”

Section: Introductionmentioning

confidence: 99%

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Lighting and display screens: Models for predicting luminance limits and disturbance

Ramasoot

Fotios

2011

Lighting Research & Technology

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An investigation of the level of disturbance caused by reflections from a variety of display screens, including interactive whiteboards, has been carried out using three test methods: Luminance adjustment, category rating and reading. The results from the luminance adjustment test and the category rating test were consistent, both showing similar significant effects of lighting-display parameters on the disturbance caused by screen reflections. In contrast, the objective measure of task performance in the reading test was barely responsive to reflections on the screens. Two models have been developed, one to predict the luminaire luminance at which 95% of observers were not disturbed by the reflections and the other to predict the rating of disturbance caused by reflections from the screens. Both models are based on lighting-display parameters including the size and luminance of the reflected light source and the specular reflectance, the effect of haze reflection and the background luminance of the display screen. These models can be used generally, to guide lighting recommendations and, specifically, to identify suitable luminaires to be used with given set of display screens or suitable display screens to be used with a given lighting installation.

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“…A model exists which examines die lighting/display interaction, using die maximum patch luminance from a luminaire and odier parameters of die computer screen and room. 6 This model was a substantial first step in producing a pre dictive index of acceptability for a VDT office lighting sys tem, especially since it included parameters of die VDT screen and its software-driven display. However, it is com plex to use and requires input data diat is difficult to gadier during design stages.…”

Section: Response To the Problem By The Lighting Industry And Cur Rementioning

confidence: 99%