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Video image display device and television receiving device

A technology of video display and display unit, which is applied in the field of video display devices and television receivers, and can solve problems such as video quality degradation and darkening, and achieve the effects of improving video quality, increasing brightness, and high contrast

Inactive Publication Date: 2014-10-22
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this case, there is a problem that, for example, the color of a part close to black, such as the night sky, cannot be darkened by signal processing, so the so-called black float becomes conspicuous and the video quality deteriorates.

Method used

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  • Video image display device and television receiving device
  • Video image display device and television receiving device
  • Video image display device and television receiving device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0058] figure 1 It is a figure explaining Embodiment 1 of the video display device of this invention, and shows the structure of the main part of a video display device. The video display device has a structure for performing image processing on an input video signal to display a video, and is applicable to a television receiver or the like.

[0059] A video signal separated from a broadcast signal or a video signal input from an external device is input to the light emission detection unit 1 and the black detection unit 10 . The luminescence detection unit 1 uses a predetermined feature quantity related to the brightness of the input video signal, and predetermines the luminescence quantity of the video signal based on the relationship with the feature quantity. And, the amount of light emission is detected from the feature amount of each frame of the input video signal.

[0060] For example, using the luminance of the video signal as a feature quantity, for each frame of t...

Embodiment approach 2

[0200] Figure 19 It is a figure explaining Embodiment 2 of the video display device of this invention, and shows the structure of the main part of a video display device. The video display device has a structure for performing image processing on an input video signal to display a video, and can be applied to a television receiver or the like.

[0201] A video signal separated from a broadcast signal and a video signal input from an external device are input to the signal processing section 11 and the area active control and luminance stretching section 14 . At this time, the tone mapping generated by the mapping section 13 of the signal processing section 11 is applied to the video signal to be supplied to the active area control and brightness stretching section 14 and then input to the active area control and brightness stretching section 14 .

[0202] The light emission detection unit 12 of the signal processing unit 11 generates a histogram for each frame based on the f...

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PUM

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Abstract

The objective of the present invention is, by detecting a portion of a video signal that is light-emitting, enhancing the display luminance of the light-emitting portion and displaying the same, to increase a sense of brightness for the same so as to perform video image expression with high contrast. A light emission detection unit (1) uses a predetermined feature value related to brightness of an input video image signal in order to pre-define the amount of emitted light of the video image signal according to the relationship with a feature value so as to detect the amount of emitted light on the basis of the feature value for each frame of the input video image signal. A blackness detection unit (10), from the input video image signal, detects the amount of black to display on the basis of a predetermined condition. A backlight luminance stretch unit (3) performs stretching of the light source luminance of the backlight in accordance with the amount of emitted light that has been detected, wherein the luminance stretch amount for the backlight is limited on the basis of the amount of black to display that has been detected by the blackness detection unit (10).

Description

technical field [0001] The present invention relates to a video display device and a television receiving device, more specifically, to a video display device and a television receiving device having a brightness expansion function of a video signal and a backlight source to improve the quality of displayed video. Background technique [0002] In recent years, as a display technology for television receivers, a lot of research has been done on HDR (high dynamic range imaging: high dynamic range imaging) technology for faithfully reproducing and displaying objects existing in nature. One of the purposes of HDR is to faithfully reproduce the luminous color parts such as fireworks and neon lights in the screen to create a sense of brightness. [0003] In this case, the light emission detection function can be used to detect and separate the light emission color and the object color, and only the light emission color on the screen can be brightened by signal processing and light...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/66G02F1/133G09G3/20G09G3/34G09G3/36
CPCG09G2360/16G09G2320/066G09G3/36G09G3/3426H04N5/66G09G2320/0238G09G2320/0646G09G2320/0271G06T2207/10024G06T5/40G06T5/92H04N9/64G09G3/3413G09G2320/0233G09G2320/0242
Inventor 藤根俊之白谷洋二
Owner SHARP KK