A Novel Method to Reduce Luminance Variation Due to IR-drop in Active Matrix OLED Displays

This paper introduces a scheme to compensate IR drop in real time based on the real ELVDD in display. The real ELVDD of each row of pixels at the time of charge and discharge is obtained by designing detection circuits on both sides of the display, and the pixel voltage Vdata is adjusted by the detection voltage. In this way, the display problem caused by local and global IR drop can be solved in a direct and effective way.

Section: Figmentioning

confidence: 99%

P‐13.10: AMOLED IR‐drop Automatic Compensation Based on Real ELVDD

Wang

Zhou

et al. 2021

“…To alleviate the aforementioned difficulties in compensating IRdrops for OLED panels, several studies explored the possibility of building equivalent circuit models to estimate IR-drop and then compensate [6][7]. However, with the increase on the resolution, the accurate compensation on the IR-drop at each node is a computationally challenging problem.…”

Section: Introductionmentioning

confidence: 99%

P‐15.11: Sparse‐Storage‐based IR‐Drop Algorithm for High Resolution OLED Panels

Ren,

Li,

Feng

et al. 2024

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.

“…[4] Especially, as CGM function is required to be applied to individual panels produced in a factory, a precise panel model is necessary to reduce the time consumed for CGM. [5] There are several methods had been proposed previously, but most of them dealt with CGM lightly because they focused on effective Color Space Converter (CSC) implementation methods. (e.g., effective 3D LUT architectures) [6][7] In this paper, a precise panel model and a method to determine parameters for CGM using the OLED display model are proposed.…”

Section: Introductionmentioning

confidence: 99%

52‐5: A Color Gamut Mapping Method Using an OLED Display Model

Park

Shin

Song

et al. 2022

Self Cite

In this paper, we introduce how to map the native Organic Light Emitting Diode (OLED) panel's color gamut to the standard gamut (i.e., sRGB or P3). In order to achieve better accuracy and speedy mapping for the overall gamut region, we modeled OLED panel considering IR‐drop and Lateral leakage which are unique properties of OLED. In the experiment results, it is confirmed that the native mobile OLED panel was tuned to the standard gamut properly and proposed Color Gamut Mapping (CGM) result had an average distortion less than 0.4 in CIEDE2000. (It almost equals to 0.5 JNCD) In addition, whole calibration procedure can be performed within 1 minute by using proposed method, so that could be applied to individual panel calibration in a factory line.