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Large-size and high-resolution AMOLED displays have become one of the most attractive display technologies. However, the dependence of the luminance of AMOLED on temperature severely limits wider applications. The accurate temperature distribution is important for implementing compensation into a panel to improve display uniformity. With the increase in size and resolution, the voltage drop (IR-drop) caused by the resistance of the power supply line cannot be ignored, which has influence on temperature distribution. Therefore, this paper proposes a temperature distribution analysis method based on IR-drop. Firstly, an accurate solution of IR-drop of AMOLED panels is achieved by exploiting the sparse representation in the field of artificial intelligence. Secondly, the IR-drop-based power model is established, and the output of the power model is used as the input of the AMOLED thermal simulation model. Finally, the temperature distribution of the AMOLED panel is obtained by finite-element analysis. The temperature measurements are performed on a 95-inch 8K AMOLED panel. The simulation results are compared with the actual measurements, and it is found that the temperature distribution based on IR-drop matches well with the actual measurements than that without considering IR-drop. The analysis method proposed in this paper presents high accuracy and high practicability. [ABSTRACT FROM AUTHOR]

Flexible OLED displays have become a development trend. CPI film in a flexible panel can improve the bending performance of the panel. However, CPI film is prone to plastic deformation in the bending process, which will affect the reliability and service life of OLED panel. Finite element analysis is employed in this paper to analyze how CPI film affects the bending performance of a flexible OLED panel. The simulation results show that the optimization of the structure of water‐drop‐shaped bending can improve the plastic deformation of CPI film. The reasonable position of CPI film in the stacked structure can also improve its plastic deformation. The increase of the thickness of the OCA located below the CPI film can significantly reduce its plastic deformation. The analysis method used in this paper can help improve the bending performance of a flexible OLED panel. [ABSTRACT FROM AUTHOR]

With the requirements of green development, reflective LCDs are gaining more and more applications. When reflective LCDs are used in dark environment, the display luminance cannot meet the requirement that make front light modules necessary. As the fact that front light module does not have optical films as used in backlight module, the light guide plate is directly observed by human eyes, which makes the performance of the light guide plate have profound influence on the final display. This paper firstly establishes a simulation model of the front light module. The spherical and conical dots are taken as examples to explore the influence of dot shape and parameter changes on the display performance. A kind of analysis and evaluation method of the front light module by comprehensively considering the factors of luminance, uniformity and stray light is put forward in the paper. The simulation results show that in the case of R=25μm, the spherical dots have higher comprehensive evaluation parameters at R:H=3:1, and the conical dots have higher comprehensive evaluation parameters at R:H=1:1. The analysis and evaluation method proposed in this paper can effectively guide the development of front light guides, shorten the development time and reduce the development risk. [ABSTRACT FROM AUTHOR]

X‐ray digital imaging equipment is widely used in medical, nondestructive testing, security and other fields. X‐ ray imaging device consists of x‐ray generator, flat panel detector, image processing system and display. The imaging sensor, as the key component of the flat panel detector, is mainly made of amorphous silicon, which has the disadvantages of small aperture ratio, slow imaging speed and low resolution.Indium gallium zinc oxide (IGZO) based TFT attract much attentions because of high field effect mobility, good uniformity, and low off‐current. The paper firstly establishes the simulation model of IGZO TFT and makes the deep analysis of the effects of different aspect ratios, different active layer thicknesses, and temperatures on the IGZO TFT performance. [ABSTRACT FROM AUTHOR]

The Maxwellian display presents always‐focused images to the viewer, alleviating the vergence‐accommodation conflict (VAC) in near‐eye displays (NEDs). However, the limited eyebox of the typical Maxwellian display prevents it from wider applications. We propose a large FOV holographic Maxwellian display system and develop a new eyebox expansion method simultaneously. The system utilizes the special structure of the grating to provide secondary diffraction of the reconstructed image. The lens behind the grating is able to converge the reconstructed images of different diffraction orders at certain intervals of the point of view, which realizes a large FOV and extends the exit pupil size at the same time. [ABSTRACT FROM AUTHOR]

Due to the extremely large size of driver circuits for high‐resolution OLED panels, IR‐drop analysis has become a computationally challenging problem both in terms of runtime and memory usage. In this paper, an IR‐drop algorithm based on sparse storage is proposed for OLED panels with high resolution. Firstly, an equivalent circuit model of the driving circuit of an OLED panel is establishedIR‐drop. Secondly, an IR‐drop model based on vector and matrix equations is established by using the Kirchhoff law, and the IR‐drop of an OLED panel with high resolution is solved accurately by applying the sparse representations in the field of artificial intelligence. Experimental results show that the algorithm in this paper can accurately solve the IR‐drop for OLED panels with a resolution of 8k. For the solution of a 32M nodes, the algorithm in this paper takes 120.716s to achieve the accurate solution. The proposed algorithm can solve the IR‐drop of OLED panel with high resolution faster and more accurate, which present high practicability. [ABSTRACT FROM AUTHOR]

Light‐field three‐dimension (3D) displays have been the subject of much research. The compressive light field (CLF) through multilayer stacking is limited by the low transmittance of liquid crystals to the number of layers, and the integral imaging through the combination of two‐dimensional display panels and micro lenses array (MLA) is limited by the processing size of micro lenses to the resolution. Therefore, the integral CLF by combining multilayer liquid crystal display (LCD) and MLA is proposed. It combines the characteristics of high resolution of CLF and high brightness and large depth of field of integral imaging. Simulation results demonstrate the improved image quality due to the resolution enhancement of the integral CLF compared to conventional integral imaging. [ABSTRACT FROM AUTHOR]

Conventional volume holographic waveguide display devices have the disadvantage of low optical efficiency, making it difficult to meet the needs of outdoor applications. Back‐coupling loss (BCL) can severely decrease the optical efficiency of VHG‐based waveguide systems and thin substrate and angular selectivity of the volume holographic grating (VHG) are the two main reasons of BCL. In this paper, a simple and effective double‐layer waveguide system is proposed to degrade BCL. The simulation results show that the optical efficiency of the double‐layer waveguide system is improved from 5.57% of the single‐layer waveguide to 7.41% of the double‐layer waveguide. [ABSTRACT FROM AUTHOR]