WO2010022660A1 - 一种 led显示装置 - Google Patents

一种 led显示装置 Download PDF

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Publication number
WO2010022660A1
WO2010022660A1 PCT/CN2009/073556 CN2009073556W WO2010022660A1 WO 2010022660 A1 WO2010022660 A1 WO 2010022660A1 CN 2009073556 W CN2009073556 W CN 2009073556W WO 2010022660 A1 WO2010022660 A1 WO 2010022660A1
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Prior art keywords
led
led display
display device
light emitting
white
Prior art date
Application number
PCT/CN2009/073556
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English (en)
French (fr)
Inventor
林惠忠
Original Assignee
深圳市宏啟光电有限公司
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Application filed by 深圳市宏啟光电有限公司 filed Critical 深圳市宏啟光电有限公司
Priority to CA2735189A priority Critical patent/CA2735189A1/en
Priority to JP2011600026U priority patent/JP3170821U/ja
Priority to EP09809245.5A priority patent/EP2317496A4/en
Priority to KR1020107020953A priority patent/KR101177631B1/ko
Priority to US12/920,438 priority patent/US20110006973A1/en
Priority to AU2009287226A priority patent/AU2009287226A1/en
Publication of WO2010022660A1 publication Critical patent/WO2010022660A1/zh

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0439—Pixel structures
    • G09G2300/0452—Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/06—Colour space transformation

Definitions

  • the utility model belongs to the technical field of display, and in particular relates to an LED display device.
  • each pixel 10 is composed of red, green and blue LED devices; when it is necessary to display white ⁇ , ⁇ use ternary color
  • the color mixing theory is formed by mixing three colors of RGB to form white.
  • the energy consumption of the LED display is high. It is calculated on a P10, 78.6m 2 display and consumes about 59K.
  • the LED display uses 1 day of electricity equivalent to 7-9 months of electricity consumption in an average household. Such high energy consumption is a great waste of energy.
  • the object of the present invention is to provide an LED display device, which aims to solve the problem that white light in the existing LED display device is mixed with three colors of red, green and blue, resulting in high energy consumption and waste of energy.
  • an LED display device comprising:
  • a data collection unit for acquiring image data
  • a data conversion unit that performs data conversion on image data acquired by the data collection unit
  • an LE D display that displays the converted data by the data conversion unit
  • the LED display unit includes a plurality of light emitting diode combinations composed of a red light emitting diode, a green light emitting diode, a blue light emitting diode, and a white light emitting diode.
  • the LED display device provided by the utility model uses four-color light-emitting diodes to form pixel points, and uses white light emitted by white light-emitting diodes instead of white light formed by RGB mixing; reducing energy consumption and saving energy.
  • FIG. 1 is a schematic view showing an arrangement structure of RGB light emitting diodes forming a single pixel provided by the prior art
  • 2 is a block diagram of a LED display device according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram showing an arrangement structure of RGBW light emitting diodes forming a single pixel according to an embodiment of the present invention.
  • the LED display device uses four-color light-emitting diodes to form pixel points, and uses white light emitted by white light-emitting diodes instead of white light formed by RGB mixing; reducing energy consumption and saving energy.
  • the LED display device provided by the embodiment of the present invention may be an LED display screen, an LED display lamp tube, or other LED video or image display device.
  • 2 is a block diagram showing the structure of an LED display device. For the convenience of description, only parts related to the embodiment of the present invention are shown, which are described in detail below.
  • the LED display device includes: a data collection unit 11 for acquiring image data; a data conversion unit 12 for performing data conversion on the image data acquired by the data collection unit 11; and an LED display unit 13 for converting the data converted by the data conversion unit 12.
  • the LED display unit 13 includes a plurality of light emitting diode combinations composed of a red light emitting diode, a green light emitting diode, a blue light emitting diode, and a white light emitting diode.
  • each of the above-mentioned light-emitting diodes is combined as one pixel.
  • each pixel 20 is composed of four color LED devices of red, green, blue, and white.
  • the LED in Figure 3 does not indicate the actual number of LEDs. It only shows the color categories that form a single pixel. The number of LEDs can be set as needed.
  • the LED display unit further includes: a driving module that drives the red LED, the green LED, the blue LED, and the white LED to emit light, and the driving module uses a constant current shift register.
  • the luminous efficiency of white LEDs is much greater than that of red, green and blue LEDs.
  • the red LED brightness is 300mcd.
  • the green LED has a brightness of 400mcd
  • the blue LED has a brightness of 150mcd
  • the white LED has a brightness of 1700mcd.
  • the LED display device uses a R, G, B, W four-color LED to form a complete display pixel, and replaces the white formed by R+G+B with a white LED.
  • the red LED is 255 brightness, the physical brightness is 200mcd; the green LED is 255 brightness, the physical brightness is 400mcd; the blue LED is 255 brightness, the physical brightness is 70mcd, then it is formed by RGB mixing
  • the white color is 255 levels and the physical brightness is 670mcd.
  • only one white LED can be used to replace the three LEDs (R, G, B), and the current is less than 20 mA, which can save about 60%.
  • the white LED when displaying a monochrome image, the white LED is not lit, and the scheme of this scheme is equivalent to the ternary scheme in the prior art; when the displayed image data contains red, green, and blue Color component ⁇ , white LED can be lit instead!
  • the color mixture formed by the ⁇ , G, and B diodes For example, when the red gradation value is 128, the green gradation value is 64, and the blue gradation value is 32 ⁇ , the parameters of the image data converted according to the data conversion unit are: red gradation value is 96, green gradation The value is 32, the blue gray value is 0, and the white gray value is 32.
  • the total current of the four-color system is l lmA, which is smaller than the total current of the three-color system of 17.5 mA, which reduces energy consumption and saves energy.
  • the LED display device uses a four-color diode to form a pixel point, and uses white light emitted by a white diode instead of white light formed by RGB mixing; reducing energy consumption and saving energy.

Description

说明书 一种 LED显示装置
技术领域
[1] 本实用新型属于显示技术领域， 尤其涉及一种 LED显示装置。
背景技术
[2] 现有技术中的发光二级管 （Light Emitting Diode, LED) 显示技术一直釆用红
(R) 绿 （G) 蓝 （B) 三元色方案， 如图 1所示， 每个像素 10由红绿蓝三种颜色 的 LED器件组成； 当需要显示白色吋， 釆用三元色的混色理论， 由 RGB三种颜 色混合形成白色。
[3] 然而 LED显示屏的能耗高， 以一个 P10， 78.6m2的显示屏计算， 功耗大约为 59K
W, 即 LED显示屏 1天的用电量相当于一个普通家庭 7-9个月的用电量。 如此高的 能耗对能源是一种极大的浪费。
对发明的公开
技术问题
[4] 本实用新型的目的在于提供一种 LED显示装置， 旨在解决现有的 LED显示装置 中的白光是利用红绿蓝三种颜色混合而成导致能耗高、 能源浪费的问题。
技术解决方案
[5] 本实用新型是这样实现的， 一种 LED显示装置， 包括：
[6] 用于获取图像数据的数据釆集单元； 将所述数据釆集单元获取的图像数据进行 数据转换的数据转换单元； 以及将所述数据转换单元转换后的数据显示出来的 L ED显示单元； 所述 LED显示单元包括多个由红色发光二极管、 绿色发光二极管 、 蓝色发光二极管以及白色发光二极管组成的发光二极管组合。
有益效果
[7] 本实用新型提供的 LED显示装置釆用四色发光二极管组成像素点， 利用白色发 光二极管发出的白光代替由 RGB混合形成的白光； 减少了能耗， 节约了能源。 附图说明
[8] 图 1是现有技术提供的形成单个像素的 RGB发光二极管的排列结构示意图； 图 2是本实用新型实施例提供的 LED显示装置的模块结构图；
图 3是本实用新型实施例提供的形成单个像素的 RGBW发光二极管的排列结构 示意图。
本发明的实施方式
为了使本实用新型的目的、 技术方案及优点更加清楚明白， 以下结合附图及实 施例， 对本实用新型进行进一步详细说明。 应当理解， 此处所描述的具体实施 例仅仅用以解释本实用新型， 并不用于限定本实用新型。
本实用新型实施例提供的 LED显示装置釆用四色发光二极管组成像素点， 利用 白色发光二极管发出的白光代替由 RGB混合形成的白光； 减少了能耗， 节约了 能源。
本实用新型实施例提供的 LED显示装置可以是 LED显示屏， 也可以是 LED显示 灯管， 还可以是其他 LED视频或图象显示设备。 图 2示出了 LED显示装置的模块 结构图， 为了便于说明， 仅示出了与本实用新型实施例相关的部分， 详述如下
LED显示装置包括： 数据釆集单元 11， 用于获取图像数据； 数据转换单元 12， 将数据釆集单元 11获取的图像数据进行数据转换； LED显示单元 13， 将数据转换 单元 12转换后的数据显示出来； LED显示单元 13包括多个由红色发光二极管、 绿 色发光二极管、 蓝色发光二极管以及白色发光二极管组成的发光二极管组合。 作为本实用新型的一个实施例， 每组上述发光二极管组合作为一个像素。 如图 3 所示， 每个像素 20均由红、 绿、 蓝、 白四种颜色的 LED器件组成。 图 3中 LED并 不表示实际的 LED个数， 仅示意了形成单个像素的颜色类别， 至于 LED的个数可 以根据需要设定。
作为本实用新型的一个实施例， LED显示单元还包括： 驱动红色发光二极管， 绿色发光二极管， 蓝色发光二极管以及白色发光二极管发光的驱动模块， 驱动 模块釆用恒流移位寄存器。
在本实用新型实施例中， 数据转换单元 12将数据釆集单元 11获取的图像数据进 行数据转换； 具体的转换步骤如下： 首先计算图像数据的第一红色灰度值 R0、 第一绿色灰度值 G0、 第一蓝色灰度值 B0中最小值； 其次将上述计算得到的最小 灰度值赋予给白色灰度值 Wl， 即 Wl=min (R0， GO , BO) ； 最后根据白色灰度 值 W1以及第一红色灰度值 R0、 第一绿色灰度值 G0、 第一蓝色灰度值 B0计算第 二红色灰度值 Rl、 第二绿色灰度值 Gl以及第二蓝色灰度值 B l， 即 R1=R0-W1， G 1=G0-W1 , B 1=B0-W1 °
[17] 在相同电能下， 白色发光二极管的发光效率远远大于红色、 绿色、 蓝色发光二 极管的发光效率， 例如， 在电流为 20mA的条件下， 且发光角相同吋， 红色 LED 亮度为 300mcd， 绿色 LED亮度为 400mcd， 蓝色 LED亮度为 150mcd， 而白色 LED 亮度为 1700mcd。
[18] 本实用新型实施例提供的 LED显示装置釆用 R、 G、 B、 W四色 LED组成一个完 整的显示像素， 用白色 LED替代由 R+G+B形成的白色。 假设在 20mA电流的驱动 下， 红色 LED为 255级亮度， 物理亮度为 200mcd; 绿色 LED为 255级亮度， 物理 亮度为 400mcd; 蓝色 LED为 255级亮度， 物理亮度为 70mcd， 那么由 RGB混合形 成的白色为 255级亮度， 物理亮度则为 670mcd。 然而， 本实用新型实施例中， 只 需要用一颗白色 LED便可替代这三颗 LED (R、 G、 B) ， 且电流还低于 20mA， 可省电 60%左右。
[19] 同吋， 在显示单色图象吋， 白色 LED不亮， 此吋的方案等同于现有技术中的三 元色方案； 当显示的图象数据中包含有红， 绿， 蓝三色分量吋， 白色 LED就可以 点亮代替！^、 G、 B二极管形成的混色。 例如， 当红色灰度值为 128， 绿色灰度值 为 64， 蓝色灰度值为 32吋， 则根据数据转换单元变换后的图像数据的参数为： 红色灰度值为 96， 绿色灰度值为 32， 蓝灰度值为 0， 白色灰度值为 32， 此吋四色 系的总电流为 l lmA , 比三色系的总电流 17.5mA小， 减少了能耗， 节约了能源。
[20] 本实用新型实施例提供的 LED显示装置釆用四色二极管组成像素点， 利用白色 二极管发出的白光代替由 RGB混合形成的白光； 减少了能耗， 节约了能源。
[21] 以上所述仅为本实用新型的较佳实施例而已， 并不用以限制本实用新型， 凡在 本实用新型的精神和原则之内所作的任何修改、 等同替换和改进等， 均应包含 在本实用新型的保护范围之内。

Claims

权利要求书
[1] 一种 LED显示装置， 其特征在于， 所述 LED显示装置包括：
用于获取图像数据的数据釆集单元； 将所述数据釆集单元获取的图像数据 进行数据转换的数据转换单元； 以及将所述数据转换单元转换后的数据显 示出来的 LED显示单元； 所述 LED显示单元包括多个由红色发光二极管、 绿色发光二极管、 蓝色发光二极管以及白色发光二极管组成的发光二极管 组合。
[2] 如权利要求 1所述的 LED显示装置， 其特征在于， 所述 LED显示单元还包括
： 驱动所述红色发光二极管， 绿色发光二极管， 蓝色发光二极管以及白色 发光二极管发光的驱动模块。
[3] 如权利要求 1所述的 LED显示装置， 其特征在于， 每组所述发光二极管组合 作为一个像素。
PCT/CN2009/073556 2008-08-29 2009-08-27 一种 led显示装置 WO2010022660A1 (zh)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CA2735189A CA2735189A1 (en) 2008-08-29 2009-08-27 Led display device
JP2011600026U JP3170821U (ja) 2008-08-29 2009-08-27 発光ダイオード表示装置
EP09809245.5A EP2317496A4 (en) 2008-08-29 2009-08-27 LED DISPLAY DEVICE
KR1020107020953A KR101177631B1 (ko) 2008-08-29 2009-08-27 발광다이오드 표시장치
US12/920,438 US20110006973A1 (en) 2008-08-29 2009-08-27 Led display device
AU2009287226A AU2009287226A1 (en) 2008-08-29 2009-08-27 LED display device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CNU2008201470254U CN201259772Y (zh) 2008-08-29 2008-08-29 一种led显示装置
CN200820147025.4 2008-08-29

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WO2010022660A1 true WO2010022660A1 (zh) 2010-03-04

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US (1) US20110006973A1 (zh)
EP (1) EP2317496A4 (zh)
JP (2) JP3170821U (zh)
KR (1) KR101177631B1 (zh)
CN (1) CN201259772Y (zh)
AU (1) AU2009287226A1 (zh)
CA (1) CA2735189A1 (zh)
RU (1) RU2461076C2 (zh)
WO (1) WO2010022660A1 (zh)

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US20110006973A1 (en) 2011-01-13
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CA2735189A1 (en) 2010-03-04
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