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Method and device for projecting image display

A technology of projecting images and frame images, which is applied in the display field, can solve problems such as performance impact and image display effect, and achieve the effects of prolonging service life, improving dynamic contrast, and reducing long-term high-load working conditions

Active Publication Date: 2019-04-09
QINGDAO HISENSE LASER DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention provides a method and device for projecting image display to solve the defect in the prior art that the 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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  • Method and device for projecting image display

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Experimental program
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Embodiment 1

[0080] This embodiment provides a projection image display method for displaying images. The executor of this embodiment is a device for projecting image display.

[0081] Such as Figure 2A As shown, is a schematic flow chart of the method for displaying projection images according to this embodiment. The method includes:

[0082] Step 201, acquire the first maximum grayscale value of the image of the Nth frame, where N is a positive integer.

[0083] 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.

[0084] Each pixel has three primary colors, and each primary color has its own corresponding grayscale value. There are many ways to obtain the first maximum grayscale value in this embodiment. For example, the first sub-grayscale value of each primary color of ...

Embodiment 2

[0103] In this embodiment, a further supplementary description is given to the method for displaying a projected image in Embodiment 1.

[0104] Such as image 3 As shown, is a schematic flow chart of the method for displaying projection images according to this embodiment. The method for displaying projected images in this embodiment includes:

[0105] Step 301 , acquire the first maximum gray scale value of the Nth frame image, where N is a positive integer, and go to step 302 .

[0106] This step 301 is consistent with step 201, and will not be repeated here.

[0107] Step 302 , according to the initial image signal corresponding to the N+1th frame image, obtain the second maximum grayscale value of the N+1th frame image, and go to step 303 .

[0108] The step 302 is consistent with the step 202, and will not be repeated here.

[0109] Step 303 , obtain the ratio of the first maximum gray scale value to the second maximum gray scale value, and go to step 304 .

[0110]...

Embodiment 3

[0128] This embodiment specifically illustrates the method for displaying a projected image in the above embodiments.

[0129] Assume that the image has 8000 pixels, the preset threshold is 400, and the initial brightness of the light source is K lumens.

[0130] 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.

[0131] Next, the ratio b1 / b2 is obtained.

[0132] Then, calculate the number of pixels with a grayscale value of 255 after multiplying the grayscale value of each primary color of each pixel in the second frame image by the ratio b1 / b2, and the calculated result is 1000 pixels. The value of 1000 is greater than 400, therefore, the image signal of the second frame image is not adjusted, and the optical machine generates the second frame image based on the initial image s...

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Abstract

The invention provides a projection image display method and apparatus. The method comprises the following steps: obtaining a first maximum gray scale value of the N frame of image, wherein N is a positive integer; obtaining a second maximum gray scale value of the N+1 frame of image according to an initial image signal of corresponding to the N+1 frame of image; obtaining a ratio of the first maximum gray scale value to the second maximum gray scale value, and updating the image signal according to the ratio to improve the gray scale values of primary colors of pixels in the N+1 frame of image, wherein the ratio is greater than 1; and reducing the brightness of a light source according to the ratio, so that the light source forms a projection image according to a light beam and the updated image signal. According to the projection image display method and apparatus provided by the invention, when the brightness of the light source is reduced to save the energy, the dynamic contrast of the image can also be improved to improve the image display effect, meanwhile sudden change of the brightness of the image seen by a user can be prevented, and thus the brightness is stable.

Description

technical field [0001] The present invention relates to display technology, in particular to a method and device for projecting image display. 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 three primary colors shows that all colors can be regarded as different combinations of red, green, and blue (RGB), generally, the displayed colors requ...

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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