Mini‐LED backlight units on glass for 75‐inch 8K resolution liquid crystal display

Xiao, Juncheng; Fei, Jiayang; Zheng, Feng; Liu, Quansheng; Huo, Wenxue; Ji, Li; Mei, Wenlin; Xu, Haisong; Zhang, Shengdong

doi:10.1002/jsid.1069

Cited by 18 publications

(16 citation statements)

References 10 publications

(7 reference statements)

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“…The light sources of the direct-lit Mini-Figure 2. The origin of the halo effect: halo1 is because the zone size is much larger than that of a pixel and halo2 is because of the light leakage from the bright zone to the adjacent dark zone [9].…”

Section: Mini-led Backlight Lcd Systemmentioning

confidence: 99%

“…Local dimming technology can greatly reduce LCD power consumption compared to the normal global backlight. However, considering the Mini-LED energy loss [54] and chip driving [9,17], the overall power consumption of the Mini-LED local dimming system still has room for optimization. The power consumption of the dimming system is affected by various factors such as panel size, display image content and brightness, and backlight efficiency.…”

Section: Mini-led Backlight Evaluation Parametersmentioning

confidence: 99%

“…Due to the mismatch of the size between the backlight dimming area and pixel, there would be light leakage to the front panel, causing the halo effect called "Halo1". The other is caused by the light leakage from the bright area of backlight unit (BLU) to the adjacent dark areas, called "Halo2" [9][10][11]. A schematic diagram of the two types of the halo effect is shown in Figure 2.…”

Section: Introductionmentioning

confidence: 99%

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Mini-LED Backlight Technology Progress for Liquid Crystal Display

et al. 2022

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As consumers pursue higher display quality, Mini-LED backlight technology has become the focus of research in the current display field. With its size advantage (100–200 μm), it can achieve one-thousand-level divisional dimming, and it can also be combined with quantum dot technology to greatly improve the contrast, color gamut, dark state and other element of the display performance of LCD displays. Mini-LED backlight technology is undoubtedly the most ideal solution to realize a highly dynamic range display of LCD displays, and has been widely commercialized in many fields such as TVs, tablet computers, notebook computers, and car monitors. This review mainly introduces the efforts made by researchers to eliminate the halo effect, thinning of the backlight module and reducing the backlight power consumption. The application of quantum dot technology in backlight is also presented. We predict that the number of Mini-LED backlight partitions is expected to reach a level of more than 3000 in the future, further utilizing the advantages of the small size in local dimming, but it will also inevitably be challenged by some issues such as power consumption and heat dissipation.

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Section: Mini-led Backlight Lcd Systemmentioning

confidence: 99%

Section: Mini-led Backlight Evaluation Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mini-LED Backlight Technology Progress for Liquid Crystal Display

et al. 2022

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“…Also, the use of a large number of driver ICs to control these mini-LEDs increases the cost of the panel. However, with the AM driving method, the control signals for the gate on array (GOA) [6]- [8] and the input of data voltages can be provided by one driver IC [4], [9], thus favoring a reduction in manufacturing costs. As such, the AM driving method is preferred.…”

Section: Introductionmentioning

confidence: 99%

AM Mini-LED Backlight Driving Circuit Using PWM Method With Power-Saving Mechanism

Lin

Chen

Chang

et al. 2022

IEEE J. Electron Devices Soc.

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This paper proposes a mini-light-emitting diode (mini-LED) driving circuit that is driven by pulse width modulation (PWM) for the backlights of active-matrix (AM) liquid crystal displays (LCDs). The proposed circuit compensates for threshold voltage (VTH) variations of low-temperature polycrystalline silicon thin-film transistors (LTPS TFTs) and the current-resistance (I-R) rise in VSS lines to supply a stable driving current. Operating the mini-LED at the high luminous efficacy by the PWM driving method and setting only the driving TFT on the path of the driving current reduce the power consumption of the backlight. Based on a 2.89-inch LCD panel with an AMLED 48 × 48 backlit module, the TFTs are fabricated, measured, and fitted. Simulation results show that the relative current error rates are all below 4.67% when the VTH of the driving TFT varies by ±0.3 V and the VSS rises by 0.5 V. The voltage across VDD and VSS of the proposed circuit is 4.5 V lower than that of the 6T1C compensating driving circuit, so the power consumption of the circuit is at least 27.05% lower. Therefore, the proposed driving circuit is well suitable to use in mini-LED backlit LCDs.

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“…Figure 1 shows the color realization methods that have been reported in the last 10 years. The color filter approach ( Figure 1 a) enables some degree of color implementation by applying emissive display technologies, such as OLEDs [ 13 , 14 ] and LCDs [ 15 , 16 ]. However, the application of a sub-pixelation method for such a small pixel size and strong emissive light source has limitations in the realization of a perfect single-color implementation and high optical efficiency because of the use of color filters in electronic paper with relatively large cell size, over 100 μm, of the reflective type.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Type-Variable Electronic Paper Using Electrophoretic Particle Loading with Multiple Bottom Electrode Structure

Lee

2022

Materials

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This study suggested the design of type-variable electronic paper with multiple bottom electrode structures and experimentally investigated the process mechanism of the electrophoretic particle loading method (EPLM) as an electronic ink injection method. The type-variable electronic paper was achieved by constructing the multi-electrode structure that had a structure of four electrodes that can independently apply voltage to one cell. By injecting electronic ink that mixes two types of particles with opposite charges into an electrically neutral color (blue) fluid, we realized electronic paper with a single color, and we then measured the optical characteristics of the panel. We used the EPLM to prevent charged particles that have lost their charge from being injected into the e-paper by using an electric field. In order to confirm the color expression and transmittance control effect using the multi-electrode structure, we conducted reflectance measurement and transmittance measurement experiments. Our experiments confirmed that the expression of more than five colors was possible and that the transmittance was controllable to a minimum of 13.50% and a maximum of 71.18%. This study provides an attractive method to create e-paper as a new form outside the framework of existing e-paper technology.

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Mini‐LED backlight units on glass for 75‐inch 8K resolution liquid crystal display

Cited by 18 publications

References 10 publications

Mini-LED Backlight Technology Progress for Liquid Crystal Display

Mini-LED Backlight Technology Progress for Liquid Crystal Display

AM Mini-LED Backlight Driving Circuit Using PWM Method With Power-Saving Mechanism

Fabrication of Type-Variable Electronic Paper Using Electrophoretic Particle Loading with Multiple Bottom Electrode Structure

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