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Multiscreen Display Device

A multi-screen display and screen technology, which is applied in the direction of using projection device image reproducer, static indicator, cathode ray tube indicator, etc., can solve the problem of unable to control the light source in brightness mode

Inactive Publication Date: 2015-05-27
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in Background Art A, light source control suitable for the brightness mode cannot be performed.

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment approach 1

[0031] figure 1 It is a diagram showing the configuration of the multiscreen display device 1000 according to Embodiment 1 of the present invention. The multi-screen display device 1000 is composed of a plurality of projection-type video display devices capable of projecting video light constituting a video onto a screen (screen), and details thereof will be described later. In addition, the multi-screen display device 1000 is a device that displays video on a multi-screen composed of screens of a plurality of projection-type video display devices that communicate with each other. Hereinafter, the multi-screen display device 1000 will be specifically described.

[0032] Such as figure 1 As shown, the multi-screen display device 1000 includes projection video display devices 100a, 100b, 100c, and 100d. Each projection type video display apparatus 100a, 100b, 100c, and 100d has the same structure, and details will be described later. Hereinafter, each of the projection-type ...

Embodiment approach 2

[0198] In Embodiment 1, processing for suppressing brightness variation among a plurality of projection type video display apparatuses 100 in the same brightness mode has been described. Here, the chromaticity value (chromaticity characteristic) of the LED corresponding to the control current value differs for each LED due to manufacturing variation or the like. Furthermore, in Embodiment 1, the control current value is calculated without taking chromaticity into consideration. Therefore, in the multi-screen display device 1000 according to Embodiment 1, the chromaticity may vary slightly.

[0199] On the other hand, in the multi-screen display device of the present embodiment, processing is performed to suppress not only variations in luminance but also variations in chromaticity. In addition, the multi-screen display device of this embodiment is figure 1 The multi-screen display device 1000. The following description will focus on processing different from that in Embodim...

Embodiment approach 3

[0302] In Embodiments 1 and 2, a method for reducing variations in luminance and chromaticity in the multiscreen display device 1000 was described.

[0303] In this embodiment, a description will be given of processing for solving problems that occur when the user using the multi-screen display device 1000 changes any one of the brightness modes of the projection-type video display devices 100 constituting the multi-screen display device 1000 . bad situation. This defect is such a defect that most of the luminance of the multi-screen display device 1000 changes. When this inconvenience occurs, the user will feel uncomfortable.

[0304] First, as a comparative example, a process (operation) that may cause discomfort to the user will be described.

[0305] As a premise, such as Figure 10 As shown, it is assumed that the multi-screen display device 1000 and figure 1 Similarly, it is composed of four projection type video display devices 100 . In addition, each projection ty...

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PUM

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Abstract

A microcomputer calculates a target brightness per brightness mode. Each projection video image display device specifies a target control current value corresponding to a calculated target brightness corresponding to a brightness mode set to the projection video image display device. Each projection video image display device supplies a current indicating the specified control current value to a light source of the projection video image display device.

Description

technical field [0001] The present invention relates to a multi-screen display device composed of projection type video display devices in which any one of a plurality of brightness modes is set. Background technique [0002] As a device that displays video on a large screen, there is a multi-screen display device that displays video on a multi-screen composed of screens of a plurality of projection-type video display devices. As a light source of each projection-type video display device constituting the multi-screen display device, optical devices such as high-pressure discharge lamps and LEDs (Light Emitting Diodes) that are semiconductor light-emitting elements are used. Due to manufacturing variations of these optical devices, etc., luminance variations may occur in the videos displayed by the plurality of projection-type video display devices. When there is such a difference in luminance, there is a possibility that the difference in luminance between the screens in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N9/31H04N5/445
CPCH04N21/4314H04N21/4318H04N9/3147H04N9/3155H04N9/3158H04N9/3194G09G3/3406G09G2320/0233G09G2320/0666G09G2320/0686G09G2320/0693G09G2330/021G06F3/1446G09G5/10H04N5/57G09G2320/0626G09G2360/04H04N9/77
Inventor 冈野俊之浅村吉范
Owner MITSUBISHI ELECTRIC CORP
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