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Digital driving method and system of organic light emitting diode (OLED) display device

A technology of a display device and a driving method, which is applied in the direction of static indicators, instruments, semiconductor devices, etc., can solve the problems of unlit pixels and low brightness of OLED display devices, achieve uniform overall brightness, improve brightness reduction, and increase overall brightness Effect

Active Publication Date: 2017-10-17
SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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Problems solved by technology

In the eight subfields, in the blanking period T B The previous pixels are off most of the time, resulting in a blanking period T B Most of the pixels inside are also unlit, see Figure 4 , taking the grayscale of 8bits as an example, the lighting time of the highest brightness (255 grayscale) pixels accounts for about 25% of a frame, that is, the highest brightness is only 25% of the brightness under analog voltage driving, so the digital driving method The brightness of the OLED display device will be very low

Method used

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  • Digital driving method and system of organic light emitting diode (OLED) display device

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Embodiment Construction

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0038] The terms "comprising" and "having" and any variations thereof appearing in the specification, claims and drawings of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes unlisted steps or units, or optionally further includes For other steps or units inherent in these processes, ...

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Abstract

The embodiment of the present invention discloses a digital driving method of an OLED display device. The method comprises the steps of segmenting the time slot of a frame of picture into N sub-fields, wherein N is an integer greater than or equal to 2, one of the N sub-field is a fully bright sub-field, and the fully bright sub-field comprises a full light-emitting sub-field and a blanking time slot; the pixels of the OLED display device always illumine in the full light-emitting sub-field, and the blanking time slot is located behind the full light-emitting sub-field; setting the proportion of the illumination time of the pixels in the N sub-fields and the illumination time of the pixels in the fully bright sub-field as 1 / 2<N-1>, 1 / 2<N-2>...1 to improve the brightness of the OLED display device, wherein the sub-field of which the proportion is 1 is the fully bright sub-field. The embodiment of the present invention also discloses a digital driving system of the OLED display device. According to the present invention, the advantage of improving the brightness of the OLED display device adopting the digital driving method is realized.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a digital driving method and system for an OLED display device. Background technique [0002] Organic light emitting diode (Organic Light Emitting Display, OLED) display device has self-illumination, low driving voltage, high luminous efficiency, short response time, high definition and contrast, nearly 180° viewing angle, wide operating temperature range, and can realize flexible display and With many advantages such as large-area full-color display, it is recognized by the industry as a display device with the most potential for development. [0003] An OLED display device has a plurality of pixels arranged in an array, and an organic light emitting diode is driven to emit light through a pixel driving circuit. The driving method of the OLED display device includes an analog driving method and a digital driving method. When using the analog driving method, due to differences...

Claims

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Application Information

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IPC IPC(8): G09G3/3208
CPCG09G3/3208G09G2320/0233G09G3/20G09G3/2025G09G3/3233G09G2320/0626H10K59/1213G09G3/2022G09G3/3258
Inventor 何健周明忠许神贤
Owner SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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