72.4: Novel LCD Driver ICs with Built‐In Programmable RGB Independent Gamma Control

Nose, Takeru; Furihata, Hirobumi; Hayama, Hiroshi

doi:10.1889/1.3069334

Cited by 3 publications

(4 citation statements)

References 5 publications

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“…Those gamma voltages should be set as the straight gamma curve for a simple calculation (2). At this time, the max luminance of a second sub-frame should be bigger than deviation followed equation (1). The calculated data from Equation (1) is used to data of a second sub-frame.…”

Section: -Divide Two Sub-frames (A)mentioning

confidence: 99%

“…In this case, to compensate this shortage luminance, second sub-frame has to make luminance such as 1.25nit. When this input data (999gray) passes a process of data processing, the result of calculating shortages is 1.25182 through an equation (1). And its result is used to find a compensation data.…”

Section: Examplementioning

confidence: 99%

“…For example, to display 8bit gray-scale(255 x RGB), resistors are needed as many as a number of grays on OLED TV using R,G,B independent gray-scale [1]. In case of changing gray-scale from 8bit to 10bit, a number of resistors are added as changing resolution of gray-scale.…”

Section: Introductionmentioning

confidence: 99%

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42.2: Time Division Analog Driving Method to Display High Gray‐scale of OLED Display

Kim¹,

Hong²,

Woo³

et al. 2011

Symp Digest of Tech Papers

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To raise gray‐scale, the size of DAC should be increased on driver ICs at LCD or OLED display using an analog driving method. This factor makes problems such as size and costs of a driver IC. To overcome these obstacles, this paper proposes method to display high gray‐scale without changing driver IC size. This method has a feature which is combined a digital driving technique and an analog driving technique. To implement this method, a frame should be divided into two sub‐frames which have different roles. The first sub‐frame displays an image and the second one displays additional gray‐scale which can not be displayed on the first sub‐frame. Also each sub‐frame has different gamma voltages to implement high gray‐scale.

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Section: -Divide Two Sub-frames (A)mentioning

confidence: 99%

Section: Examplementioning

confidence: 99%

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42.2: Time Division Analog Driving Method to Display High Gray‐scale of OLED Display

Kim¹,

Hong²,

Woo³

et al. 2011

Symp Digest of Tech Papers

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show abstract

“…Those ladder-resistors often consume long design times, and occupies a large chip area. We have developed a novel programmable RGB independent gamma control function [3]. By setting only several registers, gamma-curves with various gamma values can be controlled accurately and dynamically.…”

Section: Automatic Gamma Controlmentioning

confidence: 99%