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Luminance output method of projection light source and projection image display method

A technology of light source brightness and output method, which is applied in the field of projection light source brightness output and projection image display, and can solve problems such as performance impact and image display effect.

Active Publication Date: 2019-02-12
QINGDAO HISENSE LASER DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a projection light source brightness output method and a projection image display method to solve the defect in the prior art that the projection light source is in a high brightness state for a long time, which affects its performance and thus affects the display effect of the image

Method used

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  • Luminance output method of projection light source and projection image display method
  • Luminance output method of projection light source and projection image display method
  • Luminance output method of projection light source and projection image display method

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Embodiment 1

[0067] This embodiment provides a brightness output method of a projection light source, which is used for dynamically adjusting the brightness output of a projection light source.

[0068] Such as Figure 2A As shown, it is a schematic flowchart of the method for outputting brightness of a projection light source according to this embodiment. The method includes:

[0069] Step 201, acquire the first maximum grayscale value of the Nth frame image and the second maximum grayscale value of the N+M frame image, where N and M are both positive integers.

[0070] The Nth frame of image may be an image to be projected, or an image that has already been projected, or an image corresponding to an image signal in the buffer memory of the controller, which may be selected according to actual needs, and will not be repeated here. In each frame of image, each pixel has three primary colors, and each primary color has its own corresponding grayscale value. There are many ways to obtain ...

Embodiment 2

[0101] In this embodiment, the brightness output method of the projection light source in the above embodiments is specifically illustrated with examples.

[0102] Assume that the image has 8000 pixels, the preset threshold is 400, and the initial brightness of the light source is K lumens.

[0103] First, obtain the maximum grayscale value b1 of the first frame image, and then obtain the maximum grayscale value b2 of the second frame image according to the initial image signal corresponding to the second frame image in the cache, where b1>b2.

[0104] Next, obtain the ratio A=b1 / b2, where A>1, then adjust the coefficient g=A.

[0105] If b1

[0106] Then, after calculating the grayscale value of each primary color of each pixel in the second frame image multiplied by the ratio A (or the adjustment coefficient g, where g=A), the number of pixels with a grayscale value of 255, the calculation result obtained is 1000 pixels. The value of ...

Embodiment 3

[0112] An embodiment of the present invention provides a projection image display method. Before introducing the method, a brief introduction to the projection system of the present invention is firstly made.

[0113] Such as Figure 1A As shown, the projection system of the present invention includes a controller 101, a light source 102, and an optical machine 103. The light source 102 is used to provide an illumination beam, specifically to output RGB three-primary color light sequentially, and the three-primary color light is incident on the optical machine 103. Receive the image signal corresponding to a certain frame of image sent by the control unit 101, modulate the light beam according to the image signal, and put the modulated light beam into the lens 104 installed on the optical machine 103, and the light beam is emitted from the lens 104 and projected on the display. On the projection screen 105, one frame of image is formed.

[0114] The projected image display met...

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Abstract

The invention provides a projection light source brightness output method. The projection light source brightness output method comprises the following steps: obtaining a ratio of a first maximum gray level value of the N frame of image to a second maximum gray level value of the N+M frame of image in real time to obtain an adjustment coefficient, performing weighting calculation on the N+M frame of image signal according to the adjustment coefficient, judging whether the number of gray level values of base colors reaching to a preset gray level value in the N+M frame of image signal after the weighting calculation is equal to a preset threshold, if so, adjusting the projection light source brightness to a set value, and if not, adjusting the projection light source brightness to 1 / G of the original one. According to the projection light source brightness output method provided by the invention, the projection light source brightness can be dynamically adjusted, so that a projection light source is not always in a high-load working state, a certain energy saving effect can be realized, the service life of the light source is prolonged, and the output stability of projection images is ensured at the same time.

Description

technical field [0001] The invention relates to display technology, in particular to a projection light source brightness output method and a projection image display method. Background technique [0002] Laser display technology is the fourth generation of display technology after black and white display, color display and digital display. It has the advantages of wide color gamut, long life, energy saving and environmental protection, which cannot be achieved by traditional display technology. It is a revolution in the history of human vision. In recent years, as people's demand for high-definition, light and thin, and energy-saving display products continues to increase, new technologies in the display field continue to emerge. As a new type of display technology, laser display technology has gained widespread attention. [0003] Since the principle of the three primary colors shows that all colors can be regarded as different combinations of red, green, and blue (RGB), ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N9/31
CPCH04N9/3155H04N9/3179H04N9/3182
Inventor 王振郭大勃
Owner QINGDAO HISENSE LASER DISPLAY CO LTD
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