CN107167995B - Lamp source chromaticity compensation method and projection device using same - Google Patents

Lamp source chromaticity compensation method and projection device using same Download PDF

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Publication number
CN107167995B
CN107167995B CN201710281614.5A CN201710281614A CN107167995B CN 107167995 B CN107167995 B CN 107167995B CN 201710281614 A CN201710281614 A CN 201710281614A CN 107167995 B CN107167995 B CN 107167995B
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value
target
color
chromaticity
deviation
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CN107167995A (en
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梁立伟
卓之威
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Qisda Optronics Suzhou Co Ltd
Qisda Corp
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Qisda Optronics Suzhou Co Ltd
Qisda Corp
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/206—Control of light source other than position or intensity
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2053—Intensity control of illuminating light
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3179—Video signal processing therefor
    • H04N9/3182—Colour adjustment, e.g. white balance, shading or gamut
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3191—Testing thereof

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Projection Apparatus (AREA)

Abstract

The invention discloses a lamp source chromaticity compensation method and a projection device using the same, wherein the method comprises the steps of measuring a first chromaticity value of a first color of a lamp source under different brightness, determining a first deviation value according to a first target chromaticity value of the first color under different brightness and the first chromaticity value, and establishing a corresponding first table; starting the lamp source, and measuring the first brightness of the lamp source; searching the first table, and determining the first deviation value corresponding to the first brightness; and adjusting the first chromaticity value according to the first deviation value until the adjusted first chromaticity value is equal to the corresponding first target chromaticity value. The invention ensures that the finally output brightness of each color accords with the target Gamma (Gamma) setting, thereby ensuring the projection effect of the projection device.

Description

Lamp source chromaticity compensation method and projection device using same
Technical Field
The present invention relates to a method for compensating chromaticity of a light source and a projector using the same, and more particularly, to a method for compensating chromaticity of a light source by shifting brightness of each color under different brightness and a projector using the same.
Background
In general, a projection apparatus for projecting an image using a light source lamp operates on the principle that a light beam emitted from the light source lamp is modulated according to image information to form an optical image, and the optical image is enlarged and projected onto an image plane. Such a projection apparatus is widely used for information combination media such as conferences, scholars, and exhibition. As the light source lamp, a high-pressure mercury lamp or a metal halide lamp is generally used. When the projection device is used, light rays are emitted through a single mercury lamp, the light rays are filtered through the color wheel, then different light rays are emitted onto the Digital Micromirror Device (DMD), reflected through the DMD, and finally a picture is projected. In the prior art, when dynamically compensating a mercury lamp, adjustment is generally performed only for a part of luminance. In practice, the mercury lamp may have different brightness shifts of the colors at different brightness, so that the light emitted from the lamp source may affect the use of the actual projection apparatus.
Disclosure of Invention
The invention aims to provide a lamp source chromaticity compensation method and a projection device using the same, which ensure that the brightness of each color finally output by a lamp source under different brightness accords with target Gamma (Gamma) setting, thereby ensuring the projection effect of the projection device.
In order to achieve the above object, the present invention provides a method for compensating chromaticity of a lamp source, comprising:
Step A: determining a first deviation value according to a first chromatic value of a first color of a lamp source under different brightness and a first target chromatic value, and establishing a corresponding first table;
and B: starting the lamp source, and measuring the first brightness of the lamp source;
And C: searching the first table, and determining the first deviation value corresponding to the first brightness; and
Step D: and adjusting the first chromaticity value according to the first deviation value until the adjusted first chromaticity value is equal to the corresponding first target chromaticity value.
as an optional technical solution, step a includes measuring the first chromaticity value of the first color of the light source at different brightness, and determining the first deviation value according to the first chromaticity value and the corresponding first target chromaticity value.
as an optional technical solution, in step a, a difference between the first chromatic value and the first target chromatic value is the first deviation value.
As an optional technical solution, step a further includes measuring a second chromaticity value of a second color of the light source at different luminances, determining a second deviation value according to a second target chromaticity value of the second color at different luminances and the second chromaticity value, and establishing a corresponding second table, where the second color is different from the first color.
As an optional technical solution, step C further includes searching the second table, and determining the second deviation value corresponding to the first brightness; step D further includes adjusting the second chromaticity value according to the second deviation value until the adjusted second chromaticity value is equal to the corresponding second target chromaticity value.
as an optional technical solution, step a further includes measuring a third chroma value of a third color of the light source under different luminances, determining a third deviation value according to a third target chroma value of the third color under different luminances and the third chroma value, and establishing a corresponding third table, where the third color is different from the first color and the second color.
As an optional technical solution, the first color is red, the second color is green, and the third color is blue.
As an optional technical solution, the step B includes inputting a second signal to turn on the light source, and adjusting the actual brightness of the light source by using a dynamic contrast algorithm, so that the light source has the first brightness corresponding to the second signal.
As an optional technical solution, step D further includes splitting the first deviation value to include a first angle deviation value, splitting the first chrominance value to include a first angle value, splitting the first target chrominance value to include a first target angle value, where the first target angle value is equal to a sum of the first angle value and the first angle deviation value.
as an optional technical solution, step D further includes splitting the first deviation value further to include a first distance deviation value and a first layer number deviation value, splitting the first chrominance value further to include a first distance value and a first layer number value, splitting the first target chrominance value further to include a first target distance value and a first target layer number value, where the first target distance value is equal to a sum of the first distance value and the first distance deviation value, and the first target layer number value is equal to a sum of the first layer number value and the first layer number deviation value.
As an optional technical solution, step D further includes splitting the first deviation value to include a first color shift deviation value, splitting the first color value to include a first angle value, splitting the first target color value to include a first target angle value, and adjusting a color tone according to the first color shift deviation value to make the first angle value equal to the first target angle value.
As an optional technical solution, step D further includes splitting the first deviation value to include a first saturation deviation value and a first gain deviation value, splitting the first chrominance value to include a first distance value and a first layer value, splitting the first target chrominance value to include a first target distance value and a first target layer value, adjusting saturation by the first saturation deviation value to make the first distance value equal to the first target distance value, and adjusting gain by the first gain deviation value to make the first layer value equal to the first target layer value.
in addition, the invention also provides a projection device, which comprises a lamp source and a processing unit. The processing unit is coupled with the lamp source and used for determining a first deviation value according to a first chromatic value and a first target chromatic value of a first color of the lamp source under different brightness and establishing a corresponding first table; when the LED lamp is used, the lamp source is turned on, and the processing unit measures that the lamp source has first brightness; searching the first table, determining the first deviation value corresponding to the first luminance, and then adjusting the first chrominance value according to the first deviation value until the adjusted first chrominance value is equal to the first target chrominance value.
the method for compensating the chromaticity of the lamp source and the projection device using the same establish a corresponding lookup table by measuring the deviation value of each basic color of the lamp source under different brightness, and then adjust the deviation value of each color under different brightness according to the lookup table, wherein the deviation value can be divided into an angle deviation value, a distance deviation value and a layer number deviation value, so that the brightness of each color finally output by the lamp source under different brightness accords with the target Gamma (Gamma) setting, and the projection effect of the projection device is ensured.
The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.
Drawings
FIG. 1 is a block diagram of a projection apparatus according to the present invention;
Fig. 2 is a flow chart of the lamp chromaticity compensation method of the present invention.
Detailed Description
the following description of the embodiments refers to the accompanying drawings for illustrating the specific embodiments in which the invention may be practiced. The directional terms used in the present invention, such as "up", "down", "front", "back", "left", "right", "side", etc., refer to the directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention.
In the following embodiments, the same portions are denoted by the same reference numerals in different drawings.
Referring to fig. 1, fig. 1 is a block diagram of a projection apparatus according to the present invention. The projection apparatus 1000 includes a lamp source 100 and a processing unit 200, wherein the processing unit 200 is coupled to the lamp source 100. The processing unit 200 is configured to determine the first deviation value Δ CR according to the first chromaticity value ACR and the first target chromaticity value TCR of the first color R of the lamp source 100 under different luminances and establish a corresponding first Table 1. When in use, the lamp source 100 is turned on, and the processing unit 200 measures that the lamp source 100 has a first brightness b; the first Table1 is searched to determine a first deviation value Δ CR corresponding to the first brightness b, and then a first signal S1 is sent to the lamp source 100 according to the first deviation value Δ CR to adjust the first chromaticity value ACR until the adjusted first chromaticity value ACR is equal to the first target chromaticity value TCR, so that each color finally output by the lamp source 100 under different brightness conforms to a target Gamma (Gamma) setting, thereby improving the projection effect of the projection apparatus 1000. In this embodiment, the lamp source 100 is a mercury lamp.
In actual operation, the projection apparatus 1000 further includes a color wheel, a Digital Micromirror Device (DMD), and the like, and after compensation adjustment, the light emitted from the lamp source 100 reaches the color wheel and is filtered. When the image is input, different combinations of the light filtered by the color wheel are utilized to finally generate different color outputs, and the picture is projected.
The method for compensating the chromaticity of the lamp source according to the present invention is described in detail below with reference to fig. 2, and fig. 2 is a flowchart of the method for compensating the chromaticity of the lamp source according to the present invention.
The lamp source chromaticity compensation method of the invention comprises the following steps:
Step a (S100): the first deviation value Δ CR is determined according to the first chromaticity value ACR and the first target chromaticity value TCR of the first color R of the lamp source 100 under different brightness, and a corresponding first Table1 is established.
In this embodiment, the first chromaticity value ACR of the first color R of the lamp source 100 under different brightness is measured, and the first deviation value Δ CR is determined according to the first chromaticity value ACR and the corresponding first target chromaticity value TCR to establish the first Table 1.
Assuming that the maximum brightness of the lamp source 100 is 100 nits (or called candelas per square meter (cd/m2)), the brightness of the lamp source 100 is adjusted by the unit brightness of 1 nit (nt), i.e., the lamp source 100 is sequentially adjusted in the order of 100 nits, 99 nits, and 98 nits … … until the brightness is 0 nits. When the brightness of the lamp source 100 is 100 nits, it may also be referred to as 100% brightness of the lamp source 100, when the brightness of the lamp source 100 is 99 nits, it may also be referred to as 99% brightness of the lamp source 100, and so on until the brightness of the lamp source 100 is decreased to 0%. The first chromaticity value ACR of the first color R at different brightnesses is then recorded.
In this embodiment, the format of the first Table1 is as follows:
In the first Table1, TCR100 represents the first target chromaticity value corresponding to 100% brightness, TCR99 represents the first target chromaticity value corresponding to 99% brightness, TCR98 represents the first target chromaticity value corresponding to 98% brightness, and so on. ACR100 represents a first colorimetric value actually measured when the brightness is 100%, ACR99 represents a first colorimetric value actually measured when the brightness is 99%, ACR98 represents a first colorimetric value actually measured when the brightness is 98%, and so on. Δ CR100 represents a first deviation value of 100% of luminance from the first target chromaticity value TCR100 and the first chromaticity value ACR100, Δ CR99 represents a first deviation value of 99% of luminance from the first target chromaticity value TCR99 and the first chromaticity value ACR99, Δ CR98 represents a first deviation value of 98% of luminance from the first target chromaticity value TCR100 and the first chromaticity value ACR100, and so on. In actual measurement, the codes are all embodied by actual numerical values.
In the first Table1, the column of brightness is filled in a ratio of the actual brightness to the highest brightness of the lamp source 100, and in actual operation, the actual brightness value of the lamp source 100, for example, 35 nit, may be directly filled. In addition, the first Table1 includes luminance, a first target chromaticity value, a first chromaticity value and a first deviation value, and in actual operation, the first Table may only include luminance and a corresponding first deviation value, and the format of the first Table Talbe1 is not limited thereto.
In this embodiment, the maximum brightness of the lamp source 100 is 100 nits, the brightness is reduced by 1 nit when adjusting each time, the brightness of the lamp source 100 is reduced by 1% compared with the maximum brightness, and the brightness of the lamp source 100 is adjusted, measured and recorded according to the adjustment range of 1%. In actual operation, the brightness and the adjustment range of the light source 100 can be selected and set by the user according to actual needs. For example, the maximum brightness of the lamp source 100 is 150 nits, the brightness is adjusted down by 0.5 nits for each adjustment, and the brightness of the lamp source 100 is adjusted, measured, and recorded with an adjustment range of 0.33% to 0.5/150. In practical operation, the light source 100 may be adjusted to the darkest, i.e. the brightness is 0 nit, and then gradually adjusted upward according to a certain adjustment range until the light source 100 reaches the highest brightness.
In practice, the first target chromaticity value TCR is usually a target value preset according to the actual requirement of the user or according to the design requirement, and the target value varies according to the actual requirement.
Step B (S200): the light source 100 is turned on, and the measuring light source 100 has a first brightness b.
In practical operation, the lamp 100 may also be coupled to a power supply, and the power supply provides a first current as the second signal S2 to be input to the lamp 100, so that the lamp 100 is turned on. In actual operation, the actual brightness of the lamp source 100 that is turned on after receiving the second signal S2 is not necessarily the first brightness b, and at this time, the brightness of the lamp source 100 may be adjusted by using a dynamic adjustment method, so that the final output brightness S of the lamp source 100 is S ═ L × D, where L is the actual brightness output when the lamp source 100 is turned on, and D is digital dynamic contrast compensation, and the value of D is different with L in order to make the final output brightness of the lamp source 100 meet the target Gamma (Gamma) setting. The final output brightness S of the light source 100 is the first brightness b corresponding to the second signal S2. The specific dynamic adjustment method is similar to that in the prior art and is not described in detail.
step C (S300): the first Table1 is searched to determine a first deviation value Δ CR corresponding to the first brightness b.
After the first luminance b actually possessed by the lamp source 100 is measured, the luminance corresponding to the first luminance b, the first target chromaticity value TCR, the first chromaticity value ACR, and the first deviation value Δ CR are determined by looking up the first Table 1.
Step D (S400): and adjusting the first chromaticity value ACR according to the first deviation value Δ CR until the adjusted first chromaticity value ACR is equal to the corresponding first target chromaticity value TCR.
In this embodiment, the difference between the first chromaticity value ACR and the first target chromaticity value TCR is the first deviation Δ CR. Therefore, when the first deviation value Δ CR is determined, the processing unit 200 may generate a first signal S1 according to the first deviation value Δ CR and output the first signal S1 to the lamp source 100 to adjust the first chromaticity value ACR so that the adjusted first chromaticity value ACR is equal to the corresponding first target chromaticity value TCR, thereby making the first color R finally output from the lamp source 100 conform to the target Gamma (Gamma) setting.
In this embodiment, the first color R is red. In practice, the light emitted from the light source 100 may be a mixture of seven basic colors, specifically, a first color R (red), a second color G (green), a third color B (blue), a fourth color Y (yellow), a fifth color C (cyan), a sixth color M (magenta), and a seventh color W (white). Thus, in step a, the method further includes measuring a second chromaticity value ACG of the second color G of the lamp source 100 at different brightness, determining a second deviation Δ CG according to the second target chromaticity value TCG and the second chromaticity value ACG of the second color G at different brightness, and establishing a corresponding second Table2, where the second color G is different from the first color R. Step a further includes measuring a third chromaticity value ACB of the third color B of the light source 100 at different luminances, determining a third deviation Δ CB according to a third target chromaticity value TCB and the third chromaticity value ACB of the third color B at different luminances, and establishing a corresponding third Table3, where the third color B is different from the first color R and the second color G. The measurement of the fourth color G to the seventh color W and the establishment of the corresponding table are similar to the first color R, the second color G, and so on, and are not repeated herein.
After the second color G is measured and the second Table2 is established, the step C further includes searching the second Table2 and determining a second deviation value Δ CG corresponding to the first brightness b; step D further includes adjusting the second chromaticity value ACG according to the second deviation value Δ CG until the adjusted second chromaticity value ACG is equal to the corresponding second target chromaticity value TCG. The adjustment of the second color G and the rest colors are similar to the first color R, and are not repeated.
In practical operation, the chroma value can be adjusted by splitting the deviation value, the chroma value and the target chroma value and then adjusting the split values respectively. For example, with the first color R, the step D further includes splitting the first deviation value Δ CR to include the first angle deviation value RbhSplitting the first chrominance value ACR to include the first angular value ACRhSplitting the first target chromaticity value TCR to include the first target angle value TCRhFirst target angle value TCRhEqual to the first angular value ACRhDeviation value from the first angle Rbhand, i.e., TCRh＝ACRh+Rbh. Step D also includes splitting the first deviation value Δ CR to include a first distance deviation value RbsAnd first layer number deviation value RbgSplitting the first chrominance value ACR to include the first distance value ACRsand a first layer value ACRgSplitting the first target chromatic value TCR to include the first target distance value TCRsAnd a first target layer number TCRgFirst target distance value TCRsequal to the first distance value ACRsdeviation value from first distance RbsAnd, i.e., TCRs＝ACRs+Rbs(ii) a First target layer number TCRgEqual to the first layer number ACRgDeviation value Rb from the first layer numbergAnd, i.e., TCRg＝ACRg+Rbg. At this time, for example, with the first Table1, the deformed first Table Talbe1 may be as follows:
Continuously for
In the modified first Table1, the brightness is measured with an adjustment range of 1% from 9%, but it is also possible to record the brightness directly using the actual brightness, for example, 35 nits. In practical use, the projection apparatus 1000 may be fixed in a brightness section, for example, 30 nit to 40 nit, and when the first Table1 (and other tables) is made, only the brightness of the section may be selected for measurement, and it is not necessary to measure the whole brightness range of the light source 100, so as to facilitate measurement and data recording of a user, reduce the search range of the processing unit 200, and improve the processing efficiency. It should be noted that each code in the above table is only used for explanation, and the code is replaced by an actual measurement value in actual measurement. In addition, in this embodiment, only the deformed first Table1 is taken as an example for explanation, the formats of the deformed second Table2 corresponding to the second color G to the deformed seventh Table Talbe7 corresponding to the seventh color W are similar to the format of the deformed first Table1, and specific values are filled by actual measurement and are not described in detail.
For example, when the lamp source 100 has the first brightness B after the lamp source 100 is turned on in step B, the angle deviation values (i.e. the first to seventh angle deviation values) of each color Rb are obtained by looking up the table in step Ch、Gbh、……WbhThe distance deviation values (i.e., the first to seventh distance deviation values) of each color are Rbs、Gbs、……WbsThe deviation value of the number of layers (i.e. the deviation value of the first layer number to the seventh layer number) of each color is Rbg、Gbg、……Wbg. The corresponding lookup table can know that the angle value (i.e. the first to seventh angle values) of each color is ACR respectivelyh、ACGh……ACWhThe distance values (i.e., the first to seventh distance values) of each color are ACR, respectivelys、ACGs……ACWsThe layer number (i.e., the first layer number to the seventh layer number) of each color is ACRg、ACGg……ACWg. Meanwhile, the corresponding lookup table can also know that the target angle value (from the first target angle value to the seventh target angle value) of each color is TCR respectivelyh、TCGh……TCWhThe target distance value (i.e. the first target distance value to the seventh target distance value) of each color is TCRs、TCGs……TCWsThe target layer values (i.e. the first to seventh target layer values) of each color are TCRg、TCGg……TCWg。
Then, in step D, the current first to seventh colorimetric values of the first to seventh colors R to W are compensated and adjusted, and finally the colorimetric values of each color are adjusted to the target colorimetric values as follows:
TCRh＝ACRh+Rbh
TCRs＝ACRs+Rbs
TCRg＝ACRg+Rbg
TCGh＝ACGh+Gbh
TCGs＝ACGs+Gbs
TCGg＝ACGg+Gbg
……
TCWh＝ACWh+Wbh
TCWs＝ACWs+Wbs
TCWg＝ACWg+Wbg
By means of the method, the first angle value, the first distance value and the first layer value of each color are adjusted, so that the adjustment of the chromatic value of each color is achieved, and finally, each color is output to be in accordance with the target Gamma (Gamma) setting.
In another embodiment, step D further includes splitting the first deviation value Δ CR to include a first hue deviation value Δ HR, and splitting the first deviation value Δ CR to include a second hue deviation value Δ HRA chrominance value ACR split comprises a first angular value ACRhSplitting the first target chromaticity value TCR to include the first target angle value TCRhAdjusting the Hue (Hue) according to the first Hue deviation value Δ HR such that the first angle value ACRhEqual to the first target angle value TCRh. Step D further includes splitting the first deviation value Δ CR into a first saturation deviation value Δ SR and a first gain deviation value Δ GR, and splitting the first chrominance value ACR into a first distance value ACRsAnd a first layer value ACRgsplitting the first target chromatic value TCR to include the first target distance value TCRsAnd a first target layer number TCRgadjusting the Saturation (Saturation) by the first Saturation deviation Δ SR such that the first distance value ACRsEqual to the first target distance value TCRsAdjusting the Gain (Gain) by the first Gain deviation Δ GR such that the first layer value ACRgEqual to the first target layer number TCRg。
The method for compensating the chromaticity of the lamp source and the projection device using the same establish a corresponding lookup table by measuring the deviation value of each basic color of the lamp source under different brightness, and then adjust the deviation value of each color under different brightness according to the lookup table, wherein the deviation value can be divided into an angle deviation value, a distance deviation value and a layer number deviation value, so that the finally output brightness of each color conforms to the target Gamma (Gamma) setting, and the projection effect of the projection device is ensured.
The above detailed description of the preferred embodiments is intended to more clearly illustrate the features and spirit of the present invention, and is not intended to limit the scope of the present invention by the preferred embodiments disclosed above. On the contrary, it is intended to cover various modifications and equivalent arrangements included within the scope of the appended claims. The scope of the claims to be accorded the invention is therefore to be accorded the broadest interpretation so as to encompass all such modifications and equivalent arrangements as is known in the art.

Claims (11)

1. A method for compensating chromaticity of a lamp, comprising:
Step A: determining a first deviation value according to a first chromatic value of a first color of a lamp source under different brightness and a first target chromatic value, and establishing a corresponding first table;
And B: starting the lamp source, and measuring the first brightness of the lamp source;
And C: searching the first table, and determining the first deviation value corresponding to the first brightness; and
Step D: adjusting the first chromaticity value according to the first deviation value until the adjusted first chromaticity value is equal to the corresponding first target chromaticity value;
Step D further includes splitting the first deviation value to include a first angular deviation value, splitting the first chrominance value to include a first angular value, splitting the first target chrominance value to include a first target angular value, the first target angular value being equal to a sum of the first angular value and the first angular deviation value; or, the step D further includes splitting the first deviation value to include a first color shift value, splitting the first color value to include a first angle value, splitting the first target color value to include a first target angle value, and adjusting the color according to the first color shift value to make the first angle value equal to the first target angle value.
2. The method of claim 1, wherein the step A comprises measuring the first chromaticity value of the first color of the lamp at different brightness, and determining the first deviation value according to the first chromaticity value and the corresponding first target chromaticity value.
3. The lamp source chromaticity compensation method according to claim 1, wherein: in step a, the difference between the first chromaticity value and the first target chromaticity value is the first deviation value.
4. The lamp source chromaticity compensation method according to claim 1, wherein: step A also includes measuring a second chromaticity value of a second color of the light source under different brightness, determining a second deviation value according to a second target chromaticity value of the second color under different brightness and the second chromaticity value, and establishing a corresponding second table, wherein the second color is different from the first color.
5. The lamp source chromaticity compensation method according to claim 4, wherein: step C also comprises searching the second table and determining the second deviation value corresponding to the first brightness; step D further includes adjusting the second chromaticity value according to the second deviation value until the adjusted second chromaticity value is equal to the corresponding second target chromaticity value.
6. The lamp source chromaticity compensation method according to claim 4, wherein: step A also includes measuring a third chromaticity value of a third color of the light source at different luminances, determining a third deviation value according to a third target chromaticity value of the third color at different luminances and the third chromaticity value, and establishing a corresponding third table, wherein the third color is different from the first color and the second color.
7. The lamp source chromaticity compensation method according to claim 6, wherein: the first color is red, the second color is green, and the third color is blue.
8. The lamp source chromaticity compensation method according to claim 1, wherein: step B includes inputting a second signal to turn on the light source, and adjusting the actual brightness of the light source by a dynamic contrast algorithm to make the light source have the first brightness corresponding to the second signal.
9. The lamp source chromaticity compensation method according to claim 1, wherein: step D includes splitting the first deviation value to include a first angle deviation value, and further includes splitting the first deviation value to include a first distance deviation value and a first layer number deviation value, splitting the first chrominance value to include a first distance value and a first layer number value, and splitting the first target chrominance value to include a first target distance value and a first target layer number value, the first target distance value being equal to a sum of the first distance value and the first distance deviation value, the first target layer number value being equal to a sum of the first layer number value and the first layer number deviation value.
10. The lamp source chromaticity compensation method according to claim 1, wherein: step D includes splitting the first deviation value to include a first hue deviation value, and further includes splitting the first deviation value to include a first saturation deviation value and a first gain deviation value, splitting the first hue value to include a first distance value and a first layer value, splitting the first target hue value to include a first target distance value and a first target layer value, adjusting saturation by the first saturation deviation value to make the first distance value equal to the first target distance value, and adjusting gain by the first gain deviation value to make the first layer value equal to the first target layer value.
11. A projection apparatus, comprising:
A light source; and
The processing unit is coupled with the lamp source and used for determining a first deviation value according to a first chromatic value and a first target chromatic value of a first color of the lamp source under different brightness and establishing a corresponding first table;
When the LED lamp is used, the lamp source is turned on, and the processing unit measures that the lamp source has first brightness; searching the first table, determining the first deviation value corresponding to the first brightness, and then adjusting the first chrominance value according to the first deviation value until the adjusted first chrominance value is equal to the first target chrominance value;
During adjustment, the first deviation value is split to include a first angle deviation value, the first chromatic value is split to include a first angle value, the first target chromatic value is split to include a first target angle value, and the first target angle value is equal to the sum of the first angle value and the first angle deviation value; or splitting the first deviation value to include a first color shift deviation value, splitting the first color value to include a first angle value, splitting the first target chromaticity value to include a first target angle value, and adjusting the color tone according to the first color shift deviation value to make the first angle value equal to the first target angle value.
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CN108663882B (en) * 2018-04-16 2021-01-05 苏州佳世达光电有限公司 Light source system and method for generating light combination beam with target brightness value
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101715140A (en) * 2009-09-09 2010-05-26 苏州佳世达光电有限公司 Method for dynamic regulation of projection and projection display device
CN102097083A (en) * 2010-12-06 2011-06-15 广东威创视讯科技股份有限公司 Method for regulating color consistency of multi-display screen
CN103559866A (en) * 2013-11-08 2014-02-05 京东方科技集团股份有限公司 Image display control method and device
CN106409265A (en) * 2016-12-13 2017-02-15 逸德汽车测试技术（上海）股份有限公司 Method for adjusting aberration of display

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20040009966A (en) * 2002-07-26 2004-01-31 삼성전자주식회사 Apparatus and method for correcting color

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101715140A (en) * 2009-09-09 2010-05-26 苏州佳世达光电有限公司 Method for dynamic regulation of projection and projection display device
CN102097083A (en) * 2010-12-06 2011-06-15 广东威创视讯科技股份有限公司 Method for regulating color consistency of multi-display screen
CN103559866A (en) * 2013-11-08 2014-02-05 京东方科技集团股份有限公司 Image display control method and device
CN106409265A (en) * 2016-12-13 2017-02-15 逸德汽车测试技术（上海）股份有限公司 Method for adjusting aberration of display

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