CN110687737A

CN110687737A - Sequential display projector RGB three-primary-color sequencing method and projector

Info

Publication number: CN110687737A
Application number: CN201911055067.4A
Authority: CN
Inventors: 徐逸
Original assignee: Hing Spectrum Technology Chengdu Co Ltd
Current assignee: Hing Spectrum Technology Chengdu Co Ltd
Priority date: 2019-10-31
Filing date: 2019-10-31
Publication date: 2020-01-14

Abstract

The invention discloses a sequencing method of RGB (red, green and blue) three primary colors of a time sequence display projector, which aims at the characteristic that the refreshing frequency of a liquid crystal display screen is not high enough, and solves the problem that pictures are easy to flicker because the refreshing frequency of the liquid crystal display screen is not enough by arranging the RGB three primary colors in proportion, increasing the frequency ratio of R and G in the arrangement and reducing the frequency ratio of B. Meanwhile, the power of the B light source is improved to make up for the color cast caused by insufficient frequency ratio of the B primary color.

Description

Sequential display projector RGB three-primary-color sequencing method and projector

Technical Field

The invention belongs to the technical field of projector application, and particularly relates to a novel RGB three-primary-color sequencing method for a time-sequence display projector.

Background

In the visible spectrum, there are different mixing ratios of the three primary colors. This is known as red, green and blue light. After the three primary colors are mixed, secondary colors of light (here, blue, magenta, and yellow) are produced. The three primary colors are mixed in equal proportion to form white light. The RGB color model, also called RGB color model or Red-Green-Blue color model, is an additive model that adds the color lights of the three primary colors Red (Red), Green (Green) and Blue (Blue) in different proportions to generate various color lights. This mode is often used on a lighting, video system, movie, or monitor screen.

The RGB color mode is developed from a mixing principle of three primary colors of light in nature. RGB represents Red (Red), Green (Green), and Blue (Blue), respectively. Each pixel of which can bear 2 powers of 8 (256) brightness levels on each color, so that the three color channels together can produce 256 powers of 3 (1670 tens of thousands) of colors, which can theoretically restore any color that exists in nature.

An image in RGB mode supports multiple layers. There are R, G, B three monochrome channels and one color channel from which colors are mixed.

In an image of an RGB color scheme, the more a certain color is contained, the higher the brightness of the color is, and the brighter the color is in the result produced by the color. For example, if the brightness levels of all three colors are 0 (the brightness level is the lowest), the mixed color is black; if they both have a brightness level of 255 (the highest brightness level), the result is white. This is the same principle as the mixing of the three primary colors of light in nature.

The prior color liquid crystal screen has low light transmittance, is limited to be used in the fields with high requirements on light transmittance, such as liquid crystal projectors, and the like, and has recently developed the RGB three-primary-color time sequence liquid crystal display technology, but because the liquid crystal screen has the characteristic of low frequency, if the liquid crystal screen is sequenced according to the normal RGB three primary colors, the problem of picture flicker is easy to occur, and the application of the technology is influenced.

Disclosure of Invention

In order to overcome the defects, the inventor of the invention continuously reforms and innovates through long-term exploration and trial and a plurality of experiments and efforts, and provides a novel RGB three-primary-color sequencing method of a time sequence display projector, which is used for overcoming the problem that flicker is easy to occur by using the RGB three-primary-color time sequence display technology because the display frequency of a liquid crystal screen is lower.

In order to achieve the purpose, the invention adopts the technical scheme that: a sequencing method of RGB three primary colors of a time sequence display projector is characterized in that in the time sequence arrangement of the RGB three primary colors, the frequency ratio of the RGB three primary colors is different, the frequency ratio of R and G is high, and the frequency ratio of B is low, because color deviation is only related to the energy of light, when the frequency ratio 1 is the power 1, and the frequency ratio 2 is the power 2, the color deviation is the same, so that the power of a B light source is improved to make up for the color deviation caused by the insufficient frequency ratio of the B primary color. Where 1 represents before and 2 represents after reduction.

According to the RGB three-primary-color sequencing method of the time sequence display projector, the preferable technical scheme is that the frequency ratio of the B primary color is low, and meanwhile, the color deviation caused by insufficient frequency ratio of the B primary color is made up by improving the power of a B light source.

According to the sequential display projector RGB three-primary-color sorting method, a further preferable technical scheme is that the frequency ratio of R primary color and G primary color is the same or different.

According to the sequential display projector RGB three-primary-color sorting method provided by the invention, a further preferable technical scheme is that the frequency ratio of RGB three primary colors includes but is not limited to the following examples: (RGB RGB RG) ^ n repeating units, wherein the arrangement order of RGB can be arbitrarily exchanged.

According to the sequential display projector RGB three-primary-color sequencing method, a further preferable technical scheme is that a 120HZ liquid crystal screen is adopted, the R primary color accounts for 45Hz, the G primary color accounts for 45Hz, the B primary color accounts for 30Hz, the arrangement sequence is realized through the period of (RGBRRG) ^ n, and meanwhile, the power of a B light source is 1.5 times of the normal power. The invention also provides a time RGB three-primary-color time sequence display projector, which has the same main structure as the existing product structure and has the improvement that the display screen of the projector adopts the method to carry out RGB three-primary-color sequencing.

Because the human eyes have lower sensitivity to the B light, the frequency of the B light is reduced, the picture flicker phenomenon is not easy to cause, and meanwhile, the power of the B light is increased, so that the energy of the B light entering the human eyes is not reduced, and the color cast is not caused. The displayed picture achieves the effect of 45 Hz. The normal three primary colors arrangement order is: (RGB RGB RGB). sub.g.. sub.n, the present invention solves the problem of flicker by adjusting the arrangement order of the three primary colors to (RGB RGB RG). sub.n.

Compared with the prior art, the technical scheme of the invention has the following advantages:

the technical scheme of the invention makes up the defect of lower frequency of the liquid crystal screen, solves the problem of picture flicker by adjusting the frequency ratio of RGB three primary colors, increasing the frequency ratio of R and G and reducing the frequency ratio of B, and realizes color balance by improving the power of a B light source.

Because the human eyes have lower sensitivity to the B light, the frequency of the B light is reduced, the picture flicker phenomenon is not easy to cause, and meanwhile, the power of the B light is increased, so that the energy of the B light entering the human eyes is not reduced, and the color cast is not caused. The displayed picture achieves the effect of 45 Hz.

Therefore, by the invention, the visual frequency of human eyes is increased from 40Hz to 45Hz under the condition of not increasing the frequency of the liquid crystal screen, and the problem of picture flicker caused by low frequency is solved.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are a part of the embodiments of the present invention, not all of the embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the detailed description of the embodiments of the present invention provided below is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention.

Example 1

In this embodiment, a 120Hz lcd is used, and the three color ratios are set as 45Hz for the R primary, 45Hz for the G primary, and 30Hz for the B primary, and the arrangement sequence can be implemented by the period of (RGB RG) ^ n, while increasing the power of the B light source to 1.5 times the normal power.

Example 2

In this embodiment, a 120Hz LCD is used, and the three color ratios are set as R primary 50Hz, G primary 50Hz, and B primary 20Hz, the arrangement sequence can be realized by the period of (RGB RGRGRGRG) Rg ^ n, and the power of the B light source is increased to 2.5 times of the normal power.

Example 3

In this embodiment, a 120Hz lcd is used, and the three color ratios are set as 40Hz for R primary color, 60Hz for G primary color, and 30Hz for B primary color, and the arrangement sequence can be realized by the period of (RGB G RGB RG RGB) ^ n, while the power of the B light source is increased to 2 times the normal power and the power of the R light source is increased to 1.5 times the normal power.

Comparative example

The comparison embodiment adopts the 120Hz liquid crystal screen, and then the three color ratios are set as that the R primary color occupies 40Hz, the G primary color occupies 40Hz, and the B primary color occupies 40Hz, the three primary colors are realized by the period of (RGB RGBRGB) ^ n by adopting the normal arrangement sequence, the power of the B light source is the normal power, and the perception frequency of human eyes is 40 Hz.

The effect ratio of the above examples and the control examples is as follows:

it can be seen from the above table that the duty ratio of B is reduced and the power thereof is increased by the method of the present invention, and the flicker of the picture caused by low frequency can be effectively solved.

The image quality of the projector can be better based on the new RGB three-primary-color sequencing method of the time-sequence display projector, so that the method can be widely applied to various projectors and display screens of the projectors, and the display effect of the display screens is improved.

The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.

Claims

1. A sequencing method for RGB three primary colors of a time sequence display projector is characterized in that in the time sequence arrangement of the RGB three primary colors, the frequency ratio of the RGB three primary colors is different, the frequency ratio of R to G is high, the frequency ratio of B is low, and meanwhile, the power of a B light source is improved to make up for color deviation caused by the deficiency of the B primary color.

2. The sequential display projector RGB three primary colors sequencing method of claim 1, wherein the frequency ratio of B primary colors is lower, and by increasing the power of the B light source, the sequential display projector RGB three primary colors sequencing method is specifically as follows: the power before the reduction of the frequency ratio is multiplied by the same power after the reduction of the frequency ratio after the reduction, thereby compensating the color shift caused by the insufficiency of the B primary color.

3. The sequential display projector RGB three primary colors sequencing method of claim 1, wherein the ratio of R and G primary colors is different.

4. The sequential display projector RGB three primary colors sequencing method of claim 1, wherein the frequency ratio of RGB three primary colors includes but is not limited to the following examples: (RGB RGB RG) ^ n repeating units, wherein the arrangement order of RGB can be arbitrarily exchanged.

5. The sequential display projector RGB three primary color sequencing method of claim 4, wherein 120HZ LCD screen, R primary color 45Hz, G primary color 45Hz, B primary color 30Hz, the sequencing is implemented by the period of (RGB RGB RG) ^ n, and the power of B light source is 1.5 times the normal power.

6. A time RGB three primary colors time sequence display projector is characterized in that: the display screen of the projector is subjected to RGB three primary color sequencing using the method of any one of claims 1 to 5.