An adjustable beam lighting solution is coming widely on demand for different applications with improved energy efficiency, reduced light pollution, or enriched decorative effects. A Matrix Lighting configuration, which mainly consists of a light-emitting diode matrix and a lens array, is proposed as a promising adjustable beam lighting solution. It easily builds up the source-target mapping based on the integral imaging principle, and it could adjust the light beam and shape freely and timely. The basic configuration, the general design rules with imaging optics, and the optimization approaches based on ray tracing were presented. An example lighting system consists of a 32 × 32 × RGB lightemitting diode matrix, and the 8 × 8 Fresnel lens array is demonstrated, which accomplishes a localized lighting with addressable regions for power saving. It can also project colorful patterns on the ground or a wall for atmosphere heightening.

There are some important attributes influencing image quality of the laser projection television, such as white level, black level, color saturation, and contour rendering. In this paper, just noticeable differences of these four attributes are measured by the method of the two alternative forced choice with the staircase method of 1 up 2 down. The similarities and differences of just noticeable differences of the four attributes between laser projection television and liquid crystal display are compared and analyzed. Based on experimental results, a subjective image quality evaluation model can be established, which is helpful for the optimization of image quality.

There are some important attributes influencing image quality of the laser projection television, such as white level, black level, color saturation, and contour rendering. In this paper, just noticeable differences of these four attributes are measured by the method of the two alternative forced choice with the staircase method of 1 up 2 down. The similarities and differences of just noticeable differences of the four attributes between laser projection television and liquid crystal display are compared and analyzed. Based on experimental results, a subjective image quality evaluation model can be established, which is helpful for the optimization of image quality.

The high energy density of optical radiation from laser illuminated products may cause eye injury, so it is necessary to study the optical radiation safety standards for these products. The relations of related international and Chinese organizations, such as IEC/TC76, IEC/TC108, IEC/TC110, Chinese technical committee SAC/TC284, and so on, are introduced. The related standards and the relations are surveyed, especially the safety of laser products (IEC 60825) series, the photobiological safety of lamps and lamp systems (IEC 62741) series, and audio/video, information and communication technology equipment—part 1: safety requirements (IEC 62368‐1:2018). As application examples of standards, some specific laser illuminated products, including the laser projector, the laser headlamp and light detection and ranging (LiDAR) used in the vehicle, as well as the evaluation methods for the blue light effect of the display are discussed and analyzed. On the basis of the analyses of the optical radiation safety standards, it is necessary to select or develop appropriate standards for different types of laser illuminated products.

Gamma curve is a mapping relationship between the electrical signal of the display image and the output optical signal, which is very important in production. Manufacturers can achieve the visual effect of displays they want. Therefore it is meaningful to explore the influence which gamma curve has on image quality. This paper is aimed at measuring gamma's JND (Just Noticeable Difference) of LCD display by perceptual experiment, establishing image quality assessment model containing gamma based on JNDs and figure out the contribution of gamma on image quality.