A novel low‐power‐consumption all‐digital system‐on‐glass display with serial interface

Harada, Kenji; Kimura, Hiroyuki; Miyatake, Masaki; Kataoka, Seiji; Tsunashima, Takanori; Motai, Tomonobu; Kawamura, Takahiro

doi:10.1889/jsid18.1.30

Cited by 6 publications

(6 citation statements)

References 4 publications

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“…An N-bit RGB image on the panel can be displayed in the still mode by dividing the pixel into n parts. 18 Figure 4(a) shows a schematic diagram of a 6-bit area-coverage modulation pixel memory, which contains one latch, a 6-bit DRAM, and binaryweighted pixels. Figure 4(b) shows the time diagram of the corresponding control signals.…”

Section: Area-coverage Modulationmentioning

confidence: 99%

Digital time‐modulation pixel memory circuit in LTPS technology

Chen¹,

Ker²,

Wang³

2011

J Soc Info Display

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A digital time-modulation pixel memory circuit on glass substrate has been designed and verified for a 3-µm low-temperature polysilicon (LTPS) technology. From the experimental results, the proposed circuit can generate 4-bit digital codes and the corresponding inversion data with a timemodulation technique. While the liquid-crystal-display (LCD) panel operates in the still mode, which means the same image is displayed on the panel, a data driver for an LCD panel is not required to provide the image data of the frame by the proposed pixel memory circuit. This pixel memory circuit can store the frame data and generate its corresponding inversion data to refresh a static image without activating the data driver circuit. Therefore, the power consumption of a data driver can be reduced in the LCD panel.

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Section: Area-coverage Modulationmentioning

confidence: 99%

Digital time‐modulation pixel memory circuit in LTPS technology

Chen¹,

Ker²,

Wang³

2011

J Soc Info Display

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“…In contrast, reflective or transflective LCDs do not have such problems as electrophoretic displays have. When a memory‐in‐pixel (MIP) technology is employed, the LCD can also achieve ultralow power consumption . However, when showing moving images, the power consumption increases because the image data must be refreshed at every frame.…”

Section: Introductionmentioning

confidence: 99%

“…When a memory-in-pixel (MIP) technology is employed, the LCD can also achieve ultralow power consumption. [5][6][7] However, when showing moving images, the power consumption increases because the image data must be refreshed at every frame. Ultralow power consumption is limited when showing still images.…”

Section: Introductionmentioning

confidence: 99%

A memory‐in‐pixel reflective‐type LCD using newly designed system and pixel structure

et al. 2014

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-A 7.03-in. extended graphics array reflective LCD prototype has been developed by using memory-in-pixel (MIP) technologies with a newly designed system and pixel structure. The MIP system comprising a MIP backplane and a display driver has been optimized to reduce power consumption. The MIP backplane has specific circuits that allow accessing row drivers randomly, and the display driver manages which row should be accessed. Thus, the system is capable of showing a mixture of still and moving images, resulting in low power consumption. A dithering block embedded in the display driver enables to select an appropriate dithering algorithm according to the types of images and the position on the screen. In addition, the novel pixel structure, "three divided patterns", has been designed to improve image quality and to provide visibility in dark environments. The latter is based on a novel approach; interpixel area is used for an aperture to transmit light from the backlight, and the fringe field from adjacent pixel electrodes is used to control LC directions. The feature of the pixel structure is also effective for obtaining equivalent gamma between reflective and transmissive images.

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“…1,2 LCDs having a resolution of more than 300 ppi which is beyond human-eye resolution have been achieved by using LTPS TFTs and driver-integration technologies. 3 Further integration of display circuits such as a D/A converter 4 and SRAM in a pixel with serial interface circuit embedded in the frame area 5,6 have been reported with expectations to expand the application field of LTPS TFT-LCDs. In addition, papers in the literature have reported technologies that incorporate additional functions into LCDs by integrating sensors with an ambient-light-sensing function, image-capturing function, pen/finger input function, and even a 3-D input function.…”

Section: Introductionmentioning

confidence: 99%

In‐cell capacitive‐type touch sensor using LTPS TFT‐LCD technology

Nakamura¹

2011

J Soc Info Display

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An LTPS TFT-LCD with an in-cell capacitive-type touch sensor has been proposed and prototyped. The embedded sensor in the pixel was designed to amplify the voltage change caused by capacitive coupling between the detection electrode and conductive object (user's finger). No touch force is needed for sensor actuation and no extra electrical connection for the counter-substrate is needed. The validity of the observed voltage difference of the sensor output on the TFT substrate was examined. The proposed architecture is considered to be applicable to larger LCDs for various applications such as smartphones, automotive navigation systems, and mobile internet devices. TABLE 1 -LCD-embedded sensors are listed. On-cell type, charge-sensing type (pressed capacitive type), and light-sensing type (non-pressed type) have been reported.

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A novel low‐power‐consumption all‐digital system‐on‐glass display with serial interface

Cited by 6 publications

References 4 publications

Digital time‐modulation pixel memory circuit in LTPS technology

Digital time‐modulation pixel memory circuit in LTPS technology

A memory‐in‐pixel reflective‐type LCD using newly designed system and pixel structure

In‐cell capacitive‐type touch sensor using LTPS TFT‐LCD technology

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