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LED display system and LED display device

A display system, display device technology, applied in the direction of identification device, static indicator, cathode ray tube indicator, etc.

Inactive Publication Date: 2020-05-01
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, LEDs consume the most power in the lit state, and consume almost no power in the non-lit state. Therefore, for example, in a grayscale signal that is 20% relative to a full-bit full-white signal, the power consumption of the LED becomes 20%. about

Method used

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  • LED display system and LED display device
  • LED display system and LED display device
  • LED display system and LED display device

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0026] Hereinafter, Embodiment 1 of the present invention will be described using the drawings.

[0027] (Structure of LED display system)

[0028] First, the overall configuration of the LED display system 300 according to Embodiment 1 of the present invention will be described. figure 1 is a structural diagram of the LED display system 300 .

[0029] Such as figure 1 As shown, the LED display system 300 includes an LED unit 101 and a control device 200 . The LED unit 101 displays video based on video signals distributed from the control device 200 .

[0030] The LED unit 101 includes a plurality of LED display devices (hereinafter also referred to as "unit LED units") 100, and the plurality of LED display parts 5 (refer to figure 2 ) to constitute a screen. exist figure 1 In the example of the LED unit 101, one screen is constituted by the unit LED unit 100 of 6 units in the horizontal direction x 6 units in the vertical direction, a total of 36 units.

[0031] In Em...

Embodiment approach 2

[0101] Next, an LED display system 300A according to Embodiment 2 will be described. Figure 5 It is a block diagram of LED display system 300A of Embodiment 2. Figure 6 It is an explanatory diagram for explaining the timing of calculating the common luminance correction coefficient Cy based on the average luminance value Yave input via the signal line. Figure 7 It is a circuit diagram around the average luminance value communication unit 31 . In addition, in Embodiment 2, the same components as those described in Embodiment 1 are assigned the same reference numerals and description thereof will be omitted.

[0102] (Structure consisting of multiple control units and multiple LED units)

[0103] Next, a power saving control method in a case where the LED display system 300A having a pixel count of 1920×1080 or more is configured by a plurality of control devices 200 and a plurality of LED units 101 will be described.

[0104] For example, if Figure 5 As shown, by respec...

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Abstract

The purpose of the present invention is to provide a technology capable of suppressing power consumption of a plurality of LED display devices in an LED display system that is provided with a controldevice and the LED display devices. A control device 200 is provided with an average luminance calculation section 24, a correction coefficient calculation section 25, and an image signal distributionsection 14. The average luminance calculation section 24 calculates an average luminance value Yave of pixels constituting a frame. The correction coefficient calculation section 25 calculates, on the basis of the average luminance value Yave, a luminance correction coefficient Cy so that power consumption of a unit LED unit 100 is equal to a predetermined value or smaller. The image signal distribution section 14 distributes an image signal and the luminance correction coefficient Cy to the unit LED unit 100. The unit LED unit 100 is provided with a plurality of LEDs 1, a luminance adjustment section 9, and an LED drive section 4. The luminance adjustment section 9 adjusts luminance of the image signal on the basis of the luminance correction coefficient Cy. The LED drive section 4 drives the LEDs 1 on the basis of the image signal, the luminance of which has been adjusted.

Description

technical field [0001] The present invention relates to an LED display system, and in particular to LED brightness control technology. The LED display system includes a control device and an LED display device. The LED display device controls each LED (Light Emitting Diode: light emission) based on an image signal distributed from the control device. Diode) flashes to display an image. Background technique [0002] The LED display device has a plurality of LEDs as display pixels, and is mostly used for indoor and outdoor advertisement display due to the technological development and cost reduction of LEDs. So far, LED display devices have mainly displayed moving images such as natural images and animations, but due to the narrowing of the pixel pitch, the visual recognition distance becomes shorter, and it is also used for conferences and surveillance in indoor applications. Especially in surveillance applications, for example, LED display devices often display images close...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/32G09F9/33G09G3/20H01L33/00
CPCG09F9/33G09G3/32G09G5/026G09G5/10G09G2300/026G09G2320/0233G09G2320/064G09G2330/021G09G2356/00G09G2360/04G09G2360/12G09G2360/16G09G2360/18G09G2370/04G09G2370/042G09F9/3026G09G2310/08G09G2320/0646H01L25/13
Inventor 浅村吉范
Owner MITSUBISHI ELECTRIC CORP