CN110824765A - Backlight layout method of LCD display module - Google Patents

Backlight layout method of LCD display module Download PDF

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Publication number
CN110824765A
CN110824765A CN201910949906.0A CN201910949906A CN110824765A CN 110824765 A CN110824765 A CN 110824765A CN 201910949906 A CN201910949906 A CN 201910949906A CN 110824765 A CN110824765 A CN 110824765A
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CN
China
Prior art keywords
liquid crystal
crystal panel
backlight
display module
led 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.)
Pending
Application number
CN201910949906.0A
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Chinese (zh)
Inventor
孙润宇
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.)
NANJING CEC PANDA HOUSEHOLD APPLIANCES CO Ltd
Nanjing Panda Electronics Co Ltd
Original Assignee
NANJING CEC PANDA HOUSEHOLD APPLIANCES CO Ltd
Nanjing Panda Electronics 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 NANJING CEC PANDA HOUSEHOLD APPLIANCES CO Ltd, Nanjing Panda Electronics Co Ltd filed Critical NANJING CEC PANDA HOUSEHOLD APPLIANCES CO Ltd
Priority to CN201910949906.0A priority Critical patent/CN110824765A/en
Publication of CN110824765A publication Critical patent/CN110824765A/en
Pending 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
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • 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
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133611—Direct backlight including means for improving the brightness uniformity

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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)
  • Planar Illumination Modules (AREA)

Abstract

The invention discloses a backlight layout method of an LCD display module, wherein the LCD display module comprises a liquid crystal panel and a plurality of LED light bars, and each LED light bar comprises a plurality of lamp beads; the LED lamp strip is arranged perpendicular to the liquid crystal panel and provides a backlight source for the liquid crystal panel; dividing the LED light bar into a plurality of plane layers according to the vertical distance between the LED light bar and the liquid crystal panel, wherein the vertical distances between the plane layers and the liquid crystal panel are different; the backlight layout method provided by the invention changes the traditional planar layout mode of the LED backlight light bar, avoids uneven local display in a multi-layer three-dimensional layout mode, and effectively solves the problems of insufficient light dimming level depth and poor image display effect when a local light dimming technology is adopted. The brightness uniformity of the LCD panel display is improved, and the local dimming gradation depth is also improved.

Description

Backlight layout method of LCD display module
Technical Field
The invention relates to the field of liquid crystal display modules, in particular to a backlight layout method of an LCD display module.
Background
The LED lamp strip is adopted as the backlight source in the common liquid crystal flat panel display module in the market at present, and the backlight source generally has the following problems:
(1) the brightness of the middle of the screen is high, and the edge brightness is low;
(2) the light shadow is heavy, and particularly, the dimming hierarchy depth is not enough when a local dimming technology is adopted, so that the image display effect is not good;
(3) the energy utilization efficiency of the whole machine is low.
In a liquid crystal display product using an LED as a backlight, luminance uniformity is an important technical index, and particularly when a local dimming technology is adopted, in order to solve the above problems and further improve luminance uniformity of the product, improvement needs to be performed on the backlight of an LED light bar, and improvement of the layout of the backlight light bar is a feasible and effective solution strategy.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects, the invention provides a backlight layout method of an LCD display module, which is used for reasonably arranging LED lamp bars serving as a backlight source, eliminating the phenomenon of uneven local brightness such as lamp shadows and the like, improving the brightness uniformity of the backlight source and achieving the purpose of improving the image brightness uniformity of an LCD display screen. The use efficiency of the light source is improved simultaneously.
The technical scheme is as follows: in order to achieve the purpose, the invention adopts the technical scheme that:
a backlight layout method of an LCD display module comprises a liquid crystal panel and a plurality of LED light bars, wherein each LED light bar comprises a plurality of lamp beads; the LED lamp strip is arranged perpendicular to the liquid crystal panel and provides a backlight source for the liquid crystal panel; the LED lamp strip is divided into a plurality of plane layers according to the vertical distance between the LED lamp strip and the liquid crystal panel, and the vertical distances between the plane layers and the liquid crystal panel are different.
Furthermore, the lamp beads of the LED lamp strips on different plane layers are arranged in a staggered mode.
Further, the planar layer is not less than 2 layers.
Has the advantages that: the backlight layout method of the LCD display module provided by the invention changes the traditional planar layout mode of the LED backlight lamp bars, avoids uneven local display in a two-layer or multi-layer three-dimensional layout mode, and effectively solves the problems of insufficient gradation depth of dimming and poor image display effect when a local dimming technology is adopted. The brightness uniformity of the LCD panel display is improved, and the local dimming gradation depth is also improved.
Drawings
FIG. 1 is a schematic diagram of a first planar layer lamp bead layout in an embodiment of the invention;
FIG. 2 is a schematic diagram of a second planar layer lamp bead layout in an embodiment of the present invention;
FIG. 3 is a schematic diagram of a third plane layer lamp bead layout in an embodiment of the invention;
fig. 4 is a schematic view of a lamp bead layout after three planar layers are stacked according to an embodiment of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
A backlight layout method of an LCD display module comprises a liquid crystal panel and a plurality of LED light bars. Every LED lamp strip all includes a plurality of lamp pearls, and LED lamp strip perpendicular to liquid crystal display panel sets up, provides the backlight for liquid crystal display panel. The LED lamp strip is divided into a plurality of plane layers according to the vertical distance between the LED lamp strip and the liquid crystal panel, and the vertical distances between the plane layers and the liquid crystal panel are different. The lamp beads of the LED lamp strips on different plane layers are arranged in a staggered mode. And the lamp beads on different layers cannot be overlapped when observed from the direction vertical to the screen. The planar layer is provided with at least 2 layers.
The backlight LED lamp beads of the display module are respectively arranged on n different plane layers (n is more than or equal to 2), and the vertical distances D between each plane layer and the liquid crystal panel are different and are respectively marked as D1，D2…Dn。
The lamp beads of the LED lamp strips on the same plane layer can be pressed according to InLine JnArranged in a column symmetry (n-th layer, and I)nAnd JnA natural number of 1 or more), or may be an asymmetric row-column distribution. By adjusting the vertical distance D1，D2…DnNumber of rows and columns per layer and Jn、JnAnd the number n of the plane layers can realize the effects of improving the brightness uniformity of the LCD panel display and the like.
The following embodiment provides a 65-inch television module:
the 1 st plane layer and the lamp bead layout are shown in figure 1. I is1＝6,J112, the distribution is symmetrical according to 6 rows and 12 columns. The distance between every two rows of lamp beads is 111mm, and the distance between every two rows of lamp beads is 118 mm; at a distance of 24mm from the liquid crystal display screen, i.e. D1＝24mm。
The 2 nd plane layer, the lamp pearl overall arrangement is shown in figure 2.Is distributed in a shape of Chinese character kou, the middle part is left, and the edge lamp beads are reserved. Every two lines of lamp pearl intervals are 111mm, and every two lines of lamp pearl intervals are 118 mm. At a distance of 27mm from the liquid crystal display screen, i.e. D2＝27mm.
And the 3 rd plane layer and the lamp bead layout are shown in figure 3. The lamp beads are distributed according to 3 rows and 4 columns, wherein the second row, the second column and the third column are left out. The distance between every two rows of lamp beads is 118mm, the distance between the 1 st row and the second row of lamp beads is 222mm, the distance between the second row and the third row of lamp beads is 444mm, the distance between the third row and the fourth row of lamp beads is 222mm, and the distance from the screen is 30mm, namely D3＝30mm.
Fig. 4 is a layout view of three layers superimposed, viewed from a direction perpendicular to the screen.
Experiments show that the three-dimensional layout method can achieve the remarkable effects of improving the brightness uniformity by about 22% and improving the energy efficiency index by about 18%.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.

Claims (3)

1. A backlight layout method of an LCD display module is characterized in that: the LCD display module comprises a liquid crystal panel and a plurality of LED light bars, and each LED light bar comprises a plurality of lamp beads; the LED lamp strip is arranged perpendicular to the liquid crystal panel and provides a backlight source for the liquid crystal panel; the LED light bar is divided into a plurality of plane layers according to the vertical distance between the LED light bar and the liquid crystal panel, and the vertical distance between each plane layer and the liquid crystal panel is different.
2. The backlight layout method of an LCD display module according to claim 1, wherein: the lamp beads of the LED lamp strips on different plane layers are arranged in a mutually staggered mode.
3. The backlight layout method of an LCD display module according to claim 1, wherein: the planar layer is not less than 2 layers.
CN201910949906.0A 2019-10-08 2019-10-08 Backlight layout method of LCD display module Pending CN110824765A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910949906.0A CN110824765A (en) 2019-10-08 2019-10-08 Backlight layout method of LCD display module

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910949906.0A CN110824765A (en) 2019-10-08 2019-10-08 Backlight layout method of LCD display module

Publications (1)

Publication Number Publication Date
CN110824765A true CN110824765A (en) 2020-02-21

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Country Status (1)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201177214Y (en) * 2008-03-28 2009-01-07 上海沪钥电子有限公司 Multiple layer illuminous advertisement lamp box
CN101915396A (en) * 2010-07-28 2010-12-15 深圳市华星光电技术有限公司 Light guide plate and liquid crystal display module
CN202419362U (en) * 2011-12-31 2012-09-05 四川长虹光电有限公司 Direct type backlight source structure of liquid crystal display screen
CN103499899A (en) * 2013-10-08 2014-01-08 潘磊 Liquid crystal display device with multiple layers of backlight
CN205592775U (en) * 2016-04-15 2016-09-21 深圳Tcl新技术有限公司 Backlight module and liquid crystal display device
WO2016183909A1 (en) * 2015-05-15 2016-11-24 深圳市华星光电技术有限公司 Backlight module and liquid crystal display device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201177214Y (en) * 2008-03-28 2009-01-07 上海沪钥电子有限公司 Multiple layer illuminous advertisement lamp box
CN101915396A (en) * 2010-07-28 2010-12-15 深圳市华星光电技术有限公司 Light guide plate and liquid crystal display module
CN202419362U (en) * 2011-12-31 2012-09-05 四川长虹光电有限公司 Direct type backlight source structure of liquid crystal display screen
CN103499899A (en) * 2013-10-08 2014-01-08 潘磊 Liquid crystal display device with multiple layers of backlight
WO2016183909A1 (en) * 2015-05-15 2016-11-24 深圳市华星光电技术有限公司 Backlight module and liquid crystal display device
CN205592775U (en) * 2016-04-15 2016-09-21 深圳Tcl新技术有限公司 Backlight module and liquid crystal display device

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Application publication date: 20200221

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