WO2013056663A1 - 半透半反液晶显示面板及液晶显示器 - Google Patents
半透半反液晶显示面板及液晶显示器 Download PDFInfo
- Publication number
- WO2013056663A1 WO2013056663A1 PCT/CN2012/083173 CN2012083173W WO2013056663A1 WO 2013056663 A1 WO2013056663 A1 WO 2013056663A1 CN 2012083173 W CN2012083173 W CN 2012083173W WO 2013056663 A1 WO2013056663 A1 WO 2013056663A1
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- WO
- WIPO (PCT)
- Prior art keywords
- liquid crystal
- display panel
- electrode
- light shielding
- shielding layer
- Prior art date
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Classifications
-
- 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
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133512—Light shielding layers, e.g. black matrix
-
- 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
- G02F1/133553—Reflecting elements
- G02F1/133555—Transflectors
Definitions
- Embodiments of the present invention relate to a transflective liquid crystal display panel and a display having the liquid crystal display panel. Background technique
- the transflective liquid crystal display has low power consumption and strong adaptability to ambient light. It is a relatively common flat panel display technology and is widely used in mobile display devices such as mobile phones and PDAs. Transflective liquid crystal displays can display images either individually or simultaneously in both transmissive and reflective modes, so transflective LCDs can be used in any ambient light.
- the basic structure of a transflective liquid crystal display is to divide each pixel into two parts, a transmissive area and a reflective area, so that the transmissive liquid crystal operates in a transmissive mode, and the reflective liquid crystal operates in a reflective mode. When the ambient light is dark, the backlight is turned on, the light passes through the transmissive area, and the display works in the transmissive mode.
- the ambient light is brighter than the backlight, and the display works in the reflective mode, using the reflection of the surrounding light to display image.
- the transmissive region and the reflective region have different cell gaps to compensate for the optical path difference.
- Fig. 1 is a schematic view showing the basic structure of a pixel of a transflective liquid crystal display in the conventional art.
- the transition zone 208 has, for example, an angle of inclination of 45 degrees, so that when the difference in cell thickness of the reflective zone 206 and the transmissive zone 210 is 1-2 microns, the transition zone 208 will also have a width of 1-2 microns.
- the liquid crystal molecules are distorted to cause rotational dislocations, causing light leakage in the dark state, resulting in a decrease in contrast. Summary of the invention
- a transflective liquid crystal display panel has a plurality of pixels, each of which includes a reflective area, a transmissive area, and a transition area between the reflective area and the transmissive area.
- a light shielding layer is disposed in at least a portion of the plurality of pixels, and the light shielding layer is disposed at a position corresponding to the transition region
- a liquid comprising the above-described transflective liquid crystal display panel is provided Crystal display.
- FIG. 1 is a schematic view showing a basic structure of a pixel of a transflective liquid crystal display panel in a conventional art
- FIG. 2 is a schematic diagram showing the basic structure of a pixel of a transflective liquid crystal display panel according to a first embodiment of the present invention
- FIG. 3 is a top plan view showing a pixel of a transflective liquid crystal display panel according to a first embodiment of the present invention and a pixel of a conventional transflective liquid crystal display panel;
- FIG. 4 is a schematic diagram showing the basic structure of a pixel of a transflective liquid crystal display panel according to a second embodiment of the present invention.
- Fig. 5 is a view showing the basic configuration of a pixel of a transflective liquid crystal display panel according to a third embodiment of the present invention. detailed description
- Fig. 2 is a schematic view showing the basic structure of a pixel of a transflective liquid crystal display panel according to a first embodiment of the present invention.
- the transflective liquid crystal display panel includes a counter substrate 202, an array array substrate 204, and a liquid crystal layer including a plurality of liquid crystal molecules between the opposite substrate 202 and the array substrate 204 (not shown) Show).
- the counter substrate 202 is, for example, a color film substrate or a glass substrate.
- the opposite substrate 202 is a color film substrate
- a black matrix (BM) and a color pixel layer (for example, red, green, and blue (RGB) pixel layers) between adjacent black matrices are included.
- the counter substrate 202 may further include a common electrode.
- the array substrate 204 includes a plurality of gate lines and a plurality of data lines, the gate lines and the data lines crossing each other thereby defining a plurality of pixels arranged in a matrix, each of the pixels including a thin film transistor as a switching element and a liquid crystal for controlling Arranged pixel electrodes.
- the gate of the thin film transistor of each pixel is electrically connected or integrally formed with the corresponding gate line
- the source is electrically connected or integrally formed with the corresponding data line
- the drain is electrically connected or integrally formed with the corresponding pixel electrode.
- the array substrate 1 may further include a common electrode.
- a plurality of pixels are formed on the opposite substrate and the array substrate.
- One or more pixels constitute one pixel unit.
- three pixels of red, green, and blue (R, G, B) constitute one pixel unit, that is, one pixel unit includes R pixels, G pixels, and B pixels.
- the image is displayed in units of pixel units. For example, in Fig. 2, one of R pixels, G pixels, and B pixels will be described as an example.
- pixel 200 has a reflective region 206, a transition region 208, and a transmissive region 210.
- Transition zone 208 is located between reflective zone 206 and transmissive zone 210.
- a light shielding layer 212 is formed at a position corresponding to the transition region 208 on the opposite substrate 202.
- the light shielding layer 212 may be formed of any material that is impermeable to light, such as an opaque metal or resin.
- the light shielding layer 212 is made of the same material as the black matrix, so that it can be prepared simultaneously with the black matrix to simplify the process.
- the BM layer is usually made of metallic chromium (Cr), and can also be made of chromium oxide (CrOx) or resin in order to reduce surface reflection.
- the light shielding layer 212 and the black matrix BM can be simultaneously prepared by the following method. In one example, the printing method is used, that is, the light shielding layer 212 can be simultaneously formed by changing the printing pattern in which the BM is originally formed.
- the entire area is first coated with a BM material, and then subjected to exposure etching to etch away unnecessary regions to simultaneously form the black matrix BM and the light shielding layer 212.
- exposure etching to etch away unnecessary regions to simultaneously form the black matrix BM and the light shielding layer 212.
- only the mask during exposure is changed.
- the pattern can simultaneously form the black matrix BM and the light shielding layer 212.
- the opacifying layer can be made of a different material than the black matrix and/or can be prepared separately from the black matrix.
- the light shielding layer 212 is formed on the side of the opposite substrate away from the liquid crystal layer, but is shielded from light. Layer 212 may also be formed on the side of the opposite substrate adjacent to the liquid crystal layer.
- the light shielding layer 212 is formed on the opposite substrate 202, light leakage due to irregularity of the liquid crystal arrangement in the transition region 208 can be prevented.
- Fig. 3 is a plan view showing a comparison of pixels of a transflective liquid crystal display panel and pixels of a conventional transflective liquid crystal display panel according to a first embodiment of the present invention.
- the left side view in the figure is the pixel of the transflective liquid crystal display panel according to the first embodiment of the present invention, and the right side view is the pixel of the conventional transflective liquid crystal display panel.
- a black matrix BN and a light shielding layer 212 are formed in the pixels of the transflective liquid crystal display panel.
- Fig. 4 is a view showing the basic configuration of a pixel of a transflective liquid crystal display panel according to a second embodiment of the present invention.
- the basic structure of the pixel 200 in the second embodiment is the same as that of the pixel 200 in the first embodiment, except that in the second embodiment, no light shielding layer is formed on the opposite substrate 202, and
- the light shielding layer 212 is formed at a position on the array substrate 204 corresponding to the transition region 208.
- a light shielding layer 212 is formed on a side of the array substrate 204 close to the liquid crystal layer.
- the light shielding layer 212 may be formed on the side of the array substrate 204 opposite to the side close to the liquid crystal layer, that is, at the bottom of the transflective liquid crystal panel.
- the light shielding layer 212 is formed on the bottom of the transflective liquid crystal panel by applying a light shielding material layer under the transition region 208.
- the light shielding layer 212 may be formed of any material that is opaque to light, such as an opaque metal or resin.
- the light shielding layer 212 in this embodiment is made of a metal material, which can be formed simultaneously with the source and the drain of the TFT in the process of fabricating the TFT to simplify the process.
- the light shielding layer 212 may be formed simultaneously with the gate of the TFT.
- the light shielding layer 212 is formed on the array substrate 204, light leakage due to irregularity of the liquid crystal arrangement in the transition region 208 can be prevented.
- the light shielding layer 212 is formed on the opposite substrate 202 and the array substrate 204 separately in the above first and second embodiments, it may also be on the opposite substrate 202 and the array substrate 204.
- the light shielding layer 212 is simultaneously formed on the upper side to reduce light leakage.
- FIG. 5 is a basic diagram of a pixel of a transflective liquid crystal display panel according to a third embodiment of the present invention. Schematic diagram of the structure.
- a first electrode 212' is formed at a position on the opposite substrate 202 corresponding to the transition region 208
- a second electrode 212" is formed at a position on the array substrate 204 corresponding to the transition region 208.
- An alternating voltage or a direct current voltage of, for example, 3-10 V is applied between the first electrode 212 and the second electrode 212".
- an electric field is formed in the transition region 208 to control the rotation of the liquid crystal molecules in the transition region 208, so that the liquid crystal molecules at the transition region form a liquid crystal light-shielding layer, thereby preventing light leakage.
- the first electrode 212, and the second electrode 212" may be made of any conductive material. Further, in this embodiment, the first electrode 212, and the second electrode 212" may be light transmissive, It can also be opaque.
- the first electrode 212 is formed simultaneously with the common electrode.
- the second electrode 212" is formed simultaneously with the common electrode. Further, it is preferable that the second electrode 212" is formed simultaneously with the source and the drain of the TFT on the array substrate 204. Moreover, the second electrode 212" may also be formed simultaneously with the gate of the TFT.
- a voltage of 3-10 volts (AC or DC) is applied to form an electric field in the transition region 208, thereby controlling the rotation of the liquid crystal molecules in the transition region 208, leaving the transition region 208 in a dark state, thereby preventing light leakage.
- the transflective liquid crystal display according to the above embodiment of the present invention is advantageous in reducing light leakage and increasing contrast, thereby improving the picture quality of the liquid crystal panel.
- first embodiment and the third embodiment may be combined to form a light shielding layer 212 while forming a BM on the color filter substrate, and a first electrode 212' is formed on the inner surface of the color filter substrate, on the inner surface of the array substrate.
- a second electrode 212" is formed thereon, and an alternating voltage or a direct current voltage of 3-10 V is applied between the first electrode 212' and the second electrode 212".
- the size of the light shielding layer may be larger than the size of the corresponding transition region.
- the liquid crystal display of the embodiment of the present invention may further include components such as a backlight module and a driving circuit in addition to the liquid crystal panel, which will not be described in detail herein.
- the liquid crystal display can be used, for example, for a mobile phone, a pen Record books, GPS and other equipment.
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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
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US13/703,648 US9081224B2 (en) | 2011-10-21 | 2012-10-19 | Transflective liquid crystal display panel and liquid crystal display |
Applications Claiming Priority (2)
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CN201110322762.XA CN102645784B (zh) | 2011-10-21 | 2011-10-21 | 半透半反液晶显示面板及液晶显示器 |
CN201110322762.X | 2011-10-21 |
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WO2013056663A1 true WO2013056663A1 (zh) | 2013-04-25 |
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PCT/CN2012/083173 WO2013056663A1 (zh) | 2011-10-21 | 2012-10-19 | 半透半反液晶显示面板及液晶显示器 |
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US (1) | US9081224B2 (zh) |
CN (1) | CN102645784B (zh) |
WO (1) | WO2013056663A1 (zh) |
Families Citing this family (2)
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CN102645784B (zh) * | 2011-10-21 | 2015-04-08 | 京东方科技集团股份有限公司 | 半透半反液晶显示面板及液晶显示器 |
CN114566114B (zh) * | 2022-04-29 | 2022-08-09 | 惠科股份有限公司 | 显示面板和显示装置 |
Citations (7)
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CN1410811A (zh) * | 2001-09-25 | 2003-04-16 | 精工爱普生株式会社 | 半透射反射式液晶装置及利用该装置的电子设备 |
CN1417622A (zh) * | 2001-10-29 | 2003-05-14 | Lg.菲利浦Lcd株式会社 | 透反式液晶显示装置及其制作方法 |
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DE19934799B4 (de) * | 1999-07-28 | 2008-01-24 | Az Electronic Materials (Germany) Gmbh | Chiral-smektische Flüssigkristallmischung und ihre Verwendung in Aktivmatrix-Displays mit hohen Kontrastwerten |
JP2001343660A (ja) * | 2000-03-31 | 2001-12-14 | Sharp Corp | 液晶表示装置およびその欠陥修正方法 |
KR20070082953A (ko) * | 2006-02-20 | 2007-08-23 | 삼성전자주식회사 | 액정표시패널 |
JP5215617B2 (ja) * | 2007-09-04 | 2013-06-19 | 株式会社ジャパンディスプレイイースト | 液晶表示装置 |
JP5151408B2 (ja) | 2007-11-08 | 2013-02-27 | Nltテクノロジー株式会社 | 半透過型液晶表示装置 |
US8390772B2 (en) * | 2007-11-28 | 2013-03-05 | Sony Corporation | Liquid crystal display device |
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2011
- 2011-10-21 CN CN201110322762.XA patent/CN102645784B/zh active Active
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2012
- 2012-10-19 WO PCT/CN2012/083173 patent/WO2013056663A1/zh active Application Filing
- 2012-10-19 US US13/703,648 patent/US9081224B2/en active Active
Patent Citations (7)
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CN1410812A (zh) * | 2001-09-25 | 2003-04-16 | 精工爱普生株式会社 | 半透射反射式液晶装置和使用它的电子设备 |
CN1410811A (zh) * | 2001-09-25 | 2003-04-16 | 精工爱普生株式会社 | 半透射反射式液晶装置及利用该装置的电子设备 |
CN1417622A (zh) * | 2001-10-29 | 2003-05-14 | Lg.菲利浦Lcd株式会社 | 透反式液晶显示装置及其制作方法 |
JP2007071938A (ja) * | 2005-09-05 | 2007-03-22 | Sanyo Epson Imaging Devices Corp | 液晶装置および電子機器 |
JP2008015228A (ja) * | 2006-07-06 | 2008-01-24 | Seiko Epson Corp | 液晶装置及び電子機器 |
CN101539680A (zh) * | 2008-03-18 | 2009-09-23 | Nec液晶技术株式会社 | 透反射液晶显示单元 |
CN102645784A (zh) * | 2011-10-21 | 2012-08-22 | 京东方科技集团股份有限公司 | 半透半反液晶显示面板及液晶显示器 |
Also Published As
Publication number | Publication date |
---|---|
US20140049716A1 (en) | 2014-02-20 |
US9081224B2 (en) | 2015-07-14 |
CN102645784A (zh) | 2012-08-22 |
CN102645784B (zh) | 2015-04-08 |
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