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oled display device

A technology for display devices and packaging layers, which is applied to diodes, semiconductor devices, electrical components, etc., can solve the problems of yellowish color cast of light-emitting devices and the influence of the luminous life of blue light materials, etc. The effect of bias

Active Publication Date: 2019-01-01
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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Problems solved by technology

[0006] The above-mentioned panel technology of WOLED with Color Filter to realize color display is essentially an organic electroluminescent device, and white light is formed by mixing electroluminescence of R, G, and B materials. At present, the main problem faced by this technical field is that the blue light The influence of the luminous life of the material leads to the problem of yellowish color of the light-emitting device after a period of use

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Embodiment Construction

[0029] In order to further illustrate the technical means adopted by the present invention and its effects, the following describes in detail in conjunction with preferred embodiments of the present invention and accompanying drawings.

[0030] The present invention utilizes the properties of up-conversion luminescent materials to realize the blue light compensation effect of white OLED devices. The up-conversion luminescent materials refer to materials with anti-Stokes luminescence (Anti-Stokes) properties. After being excited by low-energy light, it emits high-energy light, which is just the opposite of the Stokes luminescence mechanism. In other words, it absorbs long-wavelength low-frequency light and excites short-wavelength high-frequency light. For example, absorbing infrared light excites visible light, or absorbing red light excites blue and green light. Different from the traditional typical luminescence process (involving only one ground state and one excited state)...

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Abstract

The present invention provides an OLED display device, by doping blue light up-conversion luminescent material in the flat layer, utilizing the properties of blue light up-conversion luminescent material to absorb long-wavelength light with a wavelength greater than that of blue light and excite short-wavelength blue light, effectively improving white light The color shift of the OLED device caused by the short life of the blue electroluminescent material realizes the blue light compensation of the white OLED device, and solves the problem that the traditional OLED display device is prone to yellowish color shift, and the display quality is good.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an OLED display device. Background technique [0002] Since Kodak successfully developed a thin-film organic light-emitting device in 1987, the development of organic light-emitting diodes (Organic Light-Emitting Diode, OLED) has been attracting attention. After nearly 30 years of development, OLED technology has very important applications in lighting, display and other fields. OLED display, also known as organic electroluminescence display, is a new flat panel display device. Low driving voltage, high luminous efficiency, short response time, high definition and contrast, nearly 180° viewing angle, wide operating temperature range, flexible display and large-area full-color display, etc., are recognized by the industry as the most advanced Potential display device. [0003] According to the driving method, OLED can be divided into two categories: passive matrix OLED (Passive...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L27/32H01L51/52
CPCH10K59/38H10K50/865
Inventor 李冬泽陈黎暄
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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