WO2016204325A1 - Afficheur à cristaux liquides à rendement lumineux amélioré - Google Patents

Afficheur à cristaux liquides à rendement lumineux amélioré Download PDF

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Publication number
WO2016204325A1
WO2016204325A1 PCT/KR2015/006178 KR2015006178W WO2016204325A1 WO 2016204325 A1 WO2016204325 A1 WO 2016204325A1 KR 2015006178 W KR2015006178 W KR 2015006178W WO 2016204325 A1 WO2016204325 A1 WO 2016204325A1
Authority
WO
WIPO (PCT)
Prior art keywords
quantum dot
liquid crystal
crystal display
backlight unit
light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2015/006178
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English (en)
Korean (ko)
Inventor
허지호
한송이
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Silicon Display Technology Co Ltd
Original Assignee
Silicon Display Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Silicon Display Technology Co Ltd filed Critical Silicon Display Technology Co Ltd
Priority to PCT/KR2015/006178 priority Critical patent/WO2016204325A1/fr
Publication of WO2016204325A1 publication Critical patent/WO2016204325A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors

Definitions

  • Embodiments of the present invention relate to a liquid crystal display with improved light efficiency.
  • liquid crystal display devices such as a liquid crystal display (LCD), a plasma display device (PDP), an organic EL display device (OELD), and the like have been developed, and among these flat panel display devices, it is easy to miniaturize, light weight, and thinner.
  • liquid crystal display devices having low power consumption and low driving voltage are drawing attention.
  • the liquid crystal display has an anisotropic dielectric constant between an upper transparent insulating substrate on which a common electrode, a color filter, a black matrix, and the like are formed, and a lower transparent insulating substrate on which a thin film transistor (TFT) element, a pixel electrode, and the like are formed.
  • TFT thin film transistor
  • the liquid crystal display device includes a liquid crystal layer injected between a lower array substrate, an upper color filter, and a lower array substrate and an upper color filter.
  • the color filter is spaced apart from the transparent insulating substrate at a predetermined interval, and includes a transparent insulating substrate, and includes a red color filter part, a green color filter part, and a blue color filter part on the transparent insulating substrate.
  • Conventional liquid crystal displays use a white backlight unit, which allows white light from the backlight unit to pass through the color filter and converts it into light of various wavelengths.
  • the liquid crystal display according to the prior art has a problem in that the light from the white backlight unit is lost in the process of passing through the color filter and the efficiency is lowered.
  • the present invention has been made to solve the above-described problem, and replaces the conventional color filter using a green quantum dot, red quantum dot and blue quantum dot, It is an object of the present invention to provide a liquid crystal display with improved light efficiency without loss of light from the backlight unit.
  • a liquid crystal display having improved light efficiency includes a backlight unit for irradiating light; And a quantum dot layer including a green quantum dot converting light emitted from the backlight unit into light having a green wavelength, and a red quantum dot converting light into red light.
  • the quantum dot layer may further include a blue quantum dot converting light emitted from the backlight unit into light having a blue wavelength.
  • the backlight unit may be configured as a blue LED backlight unit.
  • the green quantum dot, the red quantum dot, and the blue quantum dot may adjust the size to convert the wavelength of light of the blue wavelength emitted from the backlight unit.
  • the quantum dot layer may include a planarization film in which the green quantum dot, the red quantum and the blue quantum dot are disposed.
  • a black matrix disposed between the green quantum dot, the red quantum dot and the blue quantum dot may include.
  • the liquid crystal device may be disposed between the backlight unit and the quantum dot layer.
  • the liquid crystal may operate in any one driving mode of TN, PVS, IPS, FFS, MVA, and ASV.
  • the thin film transistor may be disposed between the backlight unit and the quantum dot layer.
  • the thin film transistor may be composed of any one of coplanar, staggered, inverted coplanar, and inverted staggered thin film transistor.
  • the thin film transistor includes a glass substrate; A gate electrode formed on the glass substrate; A gate insulating layer formed on the gate electrode; A semiconductor active layer formed on the gate insulating layer; An ohmic contact formed on the semiconductor active layer; A data terminal formed on the op contact; A protective layer on the data terminal; A bias terminal formed in an upper portion of the passivation layer and a via hole and connected to the data terminal; And a lower culture film formed on the bias terminal.
  • the quantum dot layer may be included in the LCD panel configured separately from the backlight unit.
  • a liquid crystal display having improved light efficiency includes a backlight unit for irradiating light; And a green quantum dot converting light emitted from the backlight unit into light of a green wavelength, a red quantum dot converting light into red light, and a blue quantum dot converting light into blue light. and a quantum dot layer including a blue quantum dot).
  • the backlight unit may be configured as a UV LED backlight unit.
  • the green quantum dot, the red quantum dot, and the blue quantum dot may adjust the size to convert the wavelength of light of the blue wavelength emitted from the backlight unit.
  • the quantum dot layer may include a planarization film in which the green quantum dot, the red quantum dot and the blue quantum dot are disposed.
  • a black matrix disposed between the green quantum dot, the red quantum dot and the blue quantum dot may include.
  • the liquid crystal device may be disposed between the backlight unit and the quantum dot layer.
  • the liquid crystal may operate in any one driving mode of TN, PVS, IPS, FFS, MVA, and ASV.
  • the quantum dot layer may be included in the LCD panel configured separately from the backlight unit.
  • light from the backlight unit is replaced by a conventional color filter using green quantum dots, red quantum dots, and blue quantum dots. It is possible to provide a liquid crystal display with improved light efficiency without loss of.
  • FIG. 1 is a cross-sectional view of a liquid crystal display having improved light efficiency according to an embodiment of the present invention.
  • FIG. 2 is a view for explaining a change in the wavelength of light in the quantum dot according to an embodiment of the present invention.
  • 3 is a view for explaining a change in the wavelength of light according to the size of the quantum dot according to an embodiment of the present invention.
  • FIGS. 4 and 5 are diagrams for comparing the light efficiency of the liquid crystal display according to the prior art and the liquid crystal display according to an embodiment of the present invention.
  • FIG. 1 is a cross-sectional view of a liquid crystal display having improved light efficiency according to an embodiment of the present invention.
  • an LCD having improved light efficiency includes a backlight unit 100, a quantum dot layer 120, a thin film transistor 130, and a liquid crystal 140. do.
  • the backlight unit 100 may be configured as a blue LED backlight unit or a UV LED backlight unit.
  • the backlight unit 100 when configured as a blue LED backlight unit, light of blue wavelength may be irradiated, and more specifically, 400 nm to 500 nm. The light of the wavelength can be irradiated.
  • the backlight unit 100 may be configured as a UV LED backlight unit to irradiate ultraviolet rays.
  • An LCD panel according to an embodiment of the present invention may be composed of a transistor 130, a liquid crystal 140 and a quantum dot layer 120, the quantum dot layer 120 is included in the LCD panel,
  • the backlight unit 100 may be configured separately.
  • the quantum dot layer 120 may include a green quantum dot 113 and a red quantum dot 112. ) And a blue quantum dot (117).
  • the quantum dot layer 120 may include a green quantum dot 113 and a red quantum dot. 112).
  • a quantum dot is a semiconductor crystal, a few nanometers in size, that emits itself without external light when voltage is applied.
  • the reason that the quantum dot can be used for a display is that the color of light emitted according to the size can be adjusted in addition to the self-illumination. Specifically, the smaller the size, the more blue, and the larger the red color.
  • the green quantum dot 113, the red quantum dot 112, and the blue quantum dot 117 are irradiated from the backlight unit 100.
  • Light can be used to convert to the desired wavelength range.
  • the green quantum dot 113 converts light emitted from the backlight unit 100 into light having a green wavelength, and the red quantum dot 112 from the backlight unit 100.
  • the irradiated light can be converted into red light.
  • the blue quantum dot 117 may be configured to emit light having a blue wavelength by using light emitted from the backlight unit.
  • the backlight unit 100 is composed of a blue LED backlight unit
  • the blue quantum dot 117 is configured to emit light of blue wavelength using light of blue wavelength emitted from the backlight unit. Or, it is configured not to include the blue quantum dot 117 can be used as blue light by passing the light of the blue wavelength from the backlight unit 100 through the empty space as it is.
  • the green quantum dot 113, the red quantum dot 112, and the blue quantum dot 117 may be disposed on the planarization layer 114.
  • the black matrix 111 may be disposed between the green quantum dot 113, the red quantum dot 112, and the blue quantum dot 117, and a glass substrate thereon. 110 may be disposed.
  • the common electrode 115 is formed on the planarization film 114.
  • the thin film transistor 130 and the liquid crystal 140 may be disposed between the backlight unit 100 and the quantum dot layer 120.
  • the thin film transistor 130 according to the present invention may be composed of any one of coplanar, staggered, inverted coplanar, and inverted staggered thin film transistor.
  • the thin film transistor 130 may include a glass substrate 101, a gate electrode 102, a gate insulating layer 103, a semiconductor active layer 104, an ohmic contact 105, a data terminal 106, a protective layer 107, And a bias terminal 108 and a lower culture membrane 109.
  • a gate electrode 102 is formed on the glass substrate 101, a gate insulating layer 103 is formed on the gate electrode 102, and a semiconductor active layer () is formed on the gate insulating layer 103. 104 is formed.
  • an ohmic contact 105 is formed on the semiconductor active layer 104, a data terminal 106 is formed on the ohmic contact 105, and a protective layer 107 is formed on the data terminal 106.
  • a bias terminal 108 is formed in the upper portion of the protective layer 107 and the via hole so as to be connected to the data terminal 106, and a lower culture layer 109 is formed on the bias terminal 108.
  • the liquid crystal 140 may be disposed on the thin film transistor 130 formed as described above, and the liquid crystal 140 includes a liquid crystal operating in any one driving mode among TN, PVS, IPS, FFS, MVA, and ASV. Can be.
  • FIG. 2 is a view for explaining a change in the wavelength of light in the quantum dot according to an embodiment of the present invention
  • Figure 3 is a change in the wavelength of light according to the size of the quantum dot in accordance with an embodiment of the present invention It is a figure for demonstrating.
  • the backlight unit when configured as a blue LED backlight unit, light 201 having a blue wavelength emitted from the backlight unit is changed by the green quantum dot and the red quantum dot, respectively.
  • the blue light 201 emitted from the backlight unit passes through the green quantum dot, the light 201 changes to the green light 202, wherein the light 201 of the green wavelength is 490 nm to 560. It may have a wavelength of nm.
  • the light 201 of the blue wavelength emitted from the backlight unit passes through the red quantum dot, the light 201 of the red wavelength changes to the light 203 of the red wavelength, wherein the light 203 of the red wavelength has a wavelength of 590 nm to 660 nm.
  • the quantum dot according to the present invention can adjust the color of the light emitted according to its size.
  • the smaller the size of the quantum dot may implement a color closer to blue.
  • the larger the size of the quantum dot may implement the color closer to red. The energy of the emitted light is reduced.
  • FIGS. 4 and 5 are diagrams for comparing the light efficiency of the liquid crystal display according to the prior art and the liquid crystal display according to an embodiment of the present invention.
  • the liquid crystal display according to the related art uses a white backlight unit 401, and the white light from the backlight unit 401 passes through the color filter 402 to convert light into various wavelengths. .
  • the liquid crystal display according to the present invention even if the light from the backlight unit 100 passes through a quantum dot layer 120 and is converted into light of each wavelength, the loss of light from the backlight unit 100 is reduced. It can be about 100% (or 100%) efficient with very little.
  • the present invention there is no loss of light from the backlight unit by replacing the conventional color filter using green quantum dot, red quantum dot and blue quantum dot.
  • the liquid crystal display which improved the light efficiency can be provided.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)

Abstract

La présente invention concerne un afficheur à cristaux liquides ayant un rendement lumineux amélioré, et qui comprend : une unité de rétroéclairage pour émettre de la lumière; et une couche de points quantiques comprenant un point quantique vert pour convertir la lumière, émise par l'unité de rétroéclairage, en une lumière d'une longueur d'onde verte, un point quantique rouge pour convertir la lumière émise en une lumière rouge, et un point quantique bleu pour convertir la lumière émise en lumière bleue.
PCT/KR2015/006178 2015-06-18 2015-06-18 Afficheur à cristaux liquides à rendement lumineux amélioré Ceased WO2016204325A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/KR2015/006178 WO2016204325A1 (fr) 2015-06-18 2015-06-18 Afficheur à cristaux liquides à rendement lumineux amélioré

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2015/006178 WO2016204325A1 (fr) 2015-06-18 2015-06-18 Afficheur à cristaux liquides à rendement lumineux amélioré

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WO2016204325A1 true WO2016204325A1 (fr) 2016-12-22

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109616577A (zh) * 2018-10-26 2019-04-12 纳晶科技股份有限公司 一种量子点膜及其制备方法
WO2019184734A1 (fr) * 2018-03-27 2019-10-03 京东方科技集团股份有限公司 Dispositif d'affichage
CN112635514A (zh) * 2021-01-20 2021-04-09 上海大学 一种柔性Micro LED显示屏及其封装方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090010013A (ko) * 2006-03-15 2009-01-28 엡슨 이미징 디바이스 가부시키가이샤 액정 장치 및 전자기기
US20110089809A1 (en) * 2009-10-16 2011-04-21 Young Hoon Noh Display device using quantum dot
KR20130095955A (ko) * 2012-02-21 2013-08-29 삼성전자주식회사 도광판, 이를 포함하는 백라이트유닛, 디스플레이장치 및 도광판 제조방법
US20130335799A1 (en) * 2012-06-14 2013-12-19 Samsung Display Co., Ltd. Photoluminescence display device
KR101524726B1 (ko) * 2014-06-20 2015-06-10 실리콘 디스플레이 (주) Led 디스플레이 장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090010013A (ko) * 2006-03-15 2009-01-28 엡슨 이미징 디바이스 가부시키가이샤 액정 장치 및 전자기기
US20110089809A1 (en) * 2009-10-16 2011-04-21 Young Hoon Noh Display device using quantum dot
KR20130095955A (ko) * 2012-02-21 2013-08-29 삼성전자주식회사 도광판, 이를 포함하는 백라이트유닛, 디스플레이장치 및 도광판 제조방법
US20130335799A1 (en) * 2012-06-14 2013-12-19 Samsung Display Co., Ltd. Photoluminescence display device
KR101524726B1 (ko) * 2014-06-20 2015-06-10 실리콘 디스플레이 (주) Led 디스플레이 장치

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019184734A1 (fr) * 2018-03-27 2019-10-03 京东方科技集团股份有限公司 Dispositif d'affichage
CN109616577A (zh) * 2018-10-26 2019-04-12 纳晶科技股份有限公司 一种量子点膜及其制备方法
CN112635514A (zh) * 2021-01-20 2021-04-09 上海大学 一种柔性Micro LED显示屏及其封装方法

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