CN101841676A - Display processing method, device, system and television - Google Patents

Abstract

The embodiment of the invention provides a display processing method, a device, a system and a television. The method comprises the following steps: counting the screen brightness of an input image to generate an optimal brightness grade; generating a basic three-color light source brightness value according to the optimal brightness grade and preset white balance conditions; reading a three-color light source brightness value input by a light source system and acquired by a color sensor; judging whether the three-color light source brightness value meets the preset white balance conditions or not; if yes, directly inputting the basic three-color light source brightness value into the light source system; and if not, adjusting the proportion of the basic three-color light source brightness value and inputting the adjusted basic three-color light source brightness value into the light source system. The technical scheme of the embodiment of the invention not only can realize dynamic control of the light source brightness, but also can adjust the white balance by the feedback of the three-color light source brightness value.

Description

Display processing method, device, system and television set

Technical field

The present invention relates to the image display technology field, particularly a kind of display processing method, device, system and television set.

Background technology

Use three-color light source (as LED, laser) more and more general in the demonstration field as display light source.Along with the continuous development of new type light sources such as LED, laser, the new type light source in the demonstration field begins to be extensive use of.Three primary light source exists display color abundant, and colour temperature is adjustable, and advantages such as dynamic may command are so also seem important to the research of three primary light source control in the display system.

The brightness of new display spare can be modulated in real time, and feasible luminance dynamic control to display light source becomes a reality, and the method can improve demonstration contrast (is the content that Chinese patent application disclosed of 200810014526.x as application number).But owing to reasons such as device stabilities, display light source is after dynamic modulation, operational environment change and operating time increase, and its electro-optical characteristic may slightly change, and promptly has the color drift phenomenon, needs proofread and correct it in real time.

Summary of the invention

The embodiment of the invention provides a kind of display processing method, device, system and television set, and the technical scheme of the embodiment of the invention not only can realize that the dynamic control of light-source brightness can also come white balance is adjusted by the feedback of three-color light source brightness.

In order to realize above purpose, the embodiment of the invention provides a kind of display processing method, and described method comprises: the picture brightness to input picture is added up, and generates the optimal brightness grade; According to described optimal brightness grade and preset white balance conditions formation base three-color light source brightness value; Read the three-color light source brightness value of the light-source system output that color sensor collects; Judge whether described three-color light source brightness value satisfies described preset white balance conditions; If satisfy, then described basic three-color light source brightness value directly inputed to described light-source system; If do not satisfy, then adjust the ratio of described basic three-color light source brightness value, adjusted three-color light source brightness value is inputed to described light-source system.

Described method also comprises: revise described preset white balance conditions; The brightness value of adjusting described basic three primary light source is to satisfy amended white balance conditions.

The ratio of adjusting described basic three-color light source brightness value comprises: the ratio of adjusting described basic three-color light source brightness value by the brightness degree of adjusting at least one color light source in the described basic three-color light source.

The brightness degree of adjusting at least one color light source in the described basic three-color light source comprises: the brightness degree of at least one color light source in the described basic three-color light source is improved or reduce a default grade.

Described method also comprises: the original intensity value is set, described original intensity value is inputed to described light-source system.

For realizing above purpose, the embodiment of the invention also provides a kind of display processing unit, and described device comprises: the brightness statistics unit, be used for the picture brightness of input picture is added up, and generate the optimal brightness grade; According to described optimal brightness grade and preset white balance conditions formation base three-color light source brightness value; The white balance correction unit is used to read the three-color light source brightness value of the light-source system output that color sensor collects; Judge whether described three-color light source brightness value satisfies described preset white balance conditions; If satisfy, then described basic three-color light source brightness value directly inputed to described light-source system; If do not satisfy, then adjust the ratio of described basic three-color light source brightness value, adjusted three-color light source brightness value is inputed to described light-source system.

Described white balance correction unit also is used to revise described preset white balance conditions; The brightness value of adjusting described basic three primary light source is to satisfy amended white balance conditions.

Described white balance correction unit, the brightness degree that specifically is used for adjusting at least one color light source of described basic three-color light source is adjusted the ratio of described basic three-color light source brightness value.

For realizing above purpose, the embodiment of the invention also provides a kind of television set, and described television set has comprised the described display processing unit of the foregoing description.

For realizing above purpose, the embodiment of the invention also provides a kind of display processing system, and described display processing system comprises: display processing unit, and described display processing unit comprises: the brightness statistics unit, be used for the picture brightness of input picture is added up, generate the optimal brightness grade; According to described optimal brightness grade and preset white balance conditions formation base three-color light source brightness value; The white balance correction unit is used to read the three-color light source brightness value of the light-source system output that color sensor collects; Judge whether described three-color light source brightness value satisfies described preset white balance conditions; If satisfy, then described basic three-color light source brightness value directly inputed to described light-source system; If do not satisfy, then adjust the ratio of described basic three-color light source brightness value, adjusted three-color light source brightness value is inputed to described light-source system; Described display processing system also comprises: light-source system, be used to receive the three-color light source brightness value that described display processing unit provides, and realize the driving output of three-color light source; Color sensor is used to gather the three-color light source brightness value of described light-source system output, and described brightness value is fed back to described display processing unit.

The display processing method of present embodiment, device, system and television set are by carrying out brightness statistics to the input picture, obtain the optimal brightness grade, and, in the dynamic control that realizes three-color light source brightness, can realize the white balance adjustment of three-color light source by the color information that color sensor collection and feedback are exported.

Description of drawings

Fig. 1 is the principle schematic of the system of present embodiment;

Fig. 2 is the functional block diagram of present embodimentdisplay processing unit 103;

Fig. 3 is the annexation figure of the display processing system of a kind of reality of present embodiment;

Fig. 4 is the display processing method flow chart of present embodiment;

Fig. 5 is the light-source brightness signals transmission schematic diagram of present embodiment.

Embodiment

For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.

The embodiment of the invention provides a kind of display processing method, device, system and television set, and this television set has comprised the display processing unit and the display processing system of present embodiment.The technical scheme of present embodiment utilizes the closed loop feedback color information to feed back white balance automatically, when display light source is dynamically adjusted, the white balance of light source is adjusted.Present embodiment comprises the dynamic adjustment of display light source: according to input picture is carried out brightness statistics, generate an optimal brightness grade, adopt this optimal brightness grade to control the bright dark of three-color light source simultaneously; Consider that the white field that might cause last output when implementing is different with white white balance before adjusting, present embodiment is also supported the white balance of light source is adjusted, the white balance adjustment of present embodiment comprises: the brightness ratio of adjusting three-color light source, satisfy preset value with the white colour temperature that guarantees to allot at last, reach the purpose of steady display color.White balance and colour temperature are the notion that is associated, and white balance is after setting a certain white spot color temperature, make white field match default colour temperature position by control three primary colors ratio.

The embodiment of the invention provides a kind of display processing system.Fig. 1 is the principle schematic of the system of present embodiment, need to prove, and the partial devices of the real system that only drawn in this schematic diagram, these devices are that present embodiment is compared with prior art and had improvements.As shown in Figure 1, the display processing system of present embodiment comprises:display processing unit 103, light-source system 20 andcolor sensor 50.

Wherein:display processing unit 103 is realized the control and treatment function of present embodiment, specifically comprises monochrome information is added up generation optimal brightness grade, to realize the dynamic control to three-color light source brightness; In addition, thisdisplay processing unit 103 can also be adjusted the white balance of three-color light source according to the color information of color sensor feedback.Light-source system 20 is used to receive the three-color light source brightness value that described display processing unit provides, and realizes the driving output of three-color light source;Color sensor 50 is used to gather the three-color light source brightness value of described light-source system output, and described brightness value is fed back to described display processing unit.

The embodiment of the invention also provides a kind of display processing unit.Fig. 2 is the functional block diagram of present embodiment display processing unit 103.As shown in Figure 2, thedisplay processing unit 103 of present embodiment specifically comprises:brightness statistics unit 201, be used for the picture brightness of input picture is added up, and generate optimal brightness grade (the visible domestic patent 200810014526.x of specific algorithm); According to described optimal brightness grade and preset white balance conditions formation base three-color light source brightness value; Whitebalance correction unit 202 is used to read the three-color light source brightness value of the light-source system output that color sensor collects; Judge whether described three-color light source brightness value satisfies described preset white balance conditions; If satisfy, then described basic three-color light source brightness value directly inputed to described light-source system; If do not satisfy, then adjust the ratio of described basic three-color light source brightness value, adjusted three-color light source brightness value is inputed to described light-source system.

Alternatively, the whitebalance correction unit 202 of present embodiment also is used to revise described preset white balance conditions; The brightness value of adjusting described basic three primary light source is to satisfy amended white balance conditions.Different white balance conditions reactions are different colour temperatures.

Alternatively, the whitebalance correction unit 202 of present embodiment, the brightness degree that specifically is used for adjusting at least one color light source of described basic three-color light source is adjusted the ratio of described basic three-color light source brightness value, improve or reduce a default grade during as each adjustment, as: with brightness degree 255 is example, improves at every turn or reduces by 1/255.

Fig. 3 is the annexation figure of the display processing system of a kind of reality of present embodiment, and the display processing system of present embodiment can be applied to in the system of three primary light source as display light source.As shown in Figure 3: this display processing system mainly comprises with the lower part: master control system 10, light-source system 20, light modulation system 30 and output system 40, and by the 103 control each several part co-ordinations of the display processing unit in the master control system 10.The concrete operation principle ofdisplay processing unit 103 sees the description of previous embodiment for details.

Different with existing display system is, the system of Fig. 3 has increased acolor sensor 50 on existing display system basis, this transducer is on the light path between light-source system 20 and the light modulation system 30, be used for monitoring in real time the output state of three-color light source, be the brightness of three primary light source, and thedisplay processing unit 103 that feeds back to master control system 10 carry out the white balance adjustment.Display processing unit 103 in the master control system 10 of Fig. 3 not only has traditional image processing function, has also possessed white balance correction and brightness statistics function.

Concrete: master control system 10 mainly comprisesvideo input device 101, front end processing device 102 and display processing unit 103.Display processing unit 103 can be analyzed picture brightness according to Input Image Content, and the calculating optimum brightness degree generates the three-color light source brightness value according to optimal brightness grade and white balance conditions, and inputs to light-source system 20, adjusts the brightness of light source in real time.

Light-source system 20 mainly compriseslight source driving 201 and light source device 202.Light source drives 201 three tunnel outputs, can finish the driving output to three-color light source, as long as the duty ratio of change three tunnel outputs just can realize the adjusting to the three-color light source white balance.

Light modulation system 30 mainly comprises optical modulator driving 301 and optical modulator 302.Display processing unit 103 generates the image control signals and drives 301 to optical modulator, and optical modulator drives 301 and controls the optical modulator imaging according to the image control signal, and the light after the imaging enters output system 40.Particularly,display processing unit 103 drives 301 discernible image control signal forms (as LVDS) according to input signal format (as DVI) generation optical modulator and is delivered to optical modulator driving 301, different display devices imaging method difference, as liquid crystal display device is by the imaging of control liquid crystal drive, and the DLP projection device is by control DMD imaging.

In actual product,display processing unit 103 can be a cpu chip.When system started working,display processing unit 103 was controlled each system coordination work respectively according to sequential, made the light that produces finally export display frame by the light path device device.

The display processing system of present embodiment can dynamically be controlled display light source, reduces the light source power consumption, improves to show contrast, adopts feedback white balance method automatically simultaneously, and the brightness and the colour temperature of light source are adjusted in real time, improves display quality.The white balance that the present invention can accurately regulate, mate light source.

The embodiment of the invention also provides a kind of display processing method, and this method is realized by thedisplay processing unit 103 of the foregoing description.Fig. 4 is the display processing method flow chart of present embodiment.As shown in Figure 4, this method comprises:

S401, the picture brightness of input picture is added up, generated the optimal brightness grade;

S402, according to described optimal brightness grade and preset white balance conditions formation base three-color light source brightness value;

S403, read the three-color light source brightness value of the light-source system output that color sensor collects;

S404, judge whether described three-color light source brightness value satisfies described preset white balance conditions; If satisfy, enter S405; If do not satisfy, enter S406;

S405, described basic three-color light source brightness value is directly inputed to described light-source system;

The ratio of S406, the described basic three-color light source brightness value of adjustment inputs to described light-source system with adjusted three-color light source brightness value.

Alternatively, described method also comprises S404 ': revise described preset white balance conditions; This moment, S406 specifically comprised: the brightness value of adjusting described basic three primary light source is to satisfy amended white balance conditions.

Alternatively, S406 is a ratio of adjusting described basic three-color light source brightness value by the brightness degree of adjusting at least one color light source in the described basic three-color light source, as: with as described in the basic three-color light source brightness degree of at least one color light source improve or reduce a default grade.

Alternatively, this method also comprises: S400 is provided with the original intensity value, and described original intensity value is inputed to described light-source system.

The ratio difference of three primary colors brightness under the different-colour, the method for the embodiment of the invention feedback by color sensor is the colour temperature of regulating system easily, and can change white balance conditions, thereby realizes that different colour temperatures shows.

Describe in detail how carrying out the white balance adjustment below in conjunction with concrete example: such as adopting wavelength is 456nm (indigo plant), 532nm (green), and the primary lights of 635nm (red) are as display light source.If the colour temperature of setting is 9300K, then can calculate coupling 9300K white light needed three primary colors brightness value ratio (concrete algorithm will be described in detail below) with specifying the pairing chromaticity coordinates of color temperature white light according to three primary colors light, suppose that the three primary colors brightness value ratio that obtains in the present embodiment is (to need to prove in actual product this three primary colors brightness value ratio can be positioned at the scope of a permission within 219: 739: 42, present embodiment only described with 219: 739: 42, also allowed other values in the actual product).

After the image input, it is 200 (scope of supposing image brightness is 0～255) thatdisplay processing unit 103 calculates the optimal brightness grade according to picture material, anddisplay processing unit 103 is according to this optimal brightness grade and preset white balance conditions formation base three primary light source brightness value.

Color sensor is measured the intrinsic brilliance value of three-color light source in light path, judge that whether the three primary colors brightness ratio satisfies the RGB ratio is 219: 739: 42 or in prescribed limit, if the actual measurement brightness ratio is 229: 739: 42, the brightness degree that then reduces red light source is 199/255 of a high-high brightness, and each scope of revising is 1/255.If satisfy preset proportion, then do not process, revised three-color light source brightness value is sent into light-source system.Enter next images handling process.

Below introduce in detail how by adopting wavelength and given colour temperature to obtain required three primary light source brightness value ratio.For example, adopting wavelength is λ_r, λ_g, λ_bThree primary colors light as display light source, then corresponding with the three primary colors light of this wavelength chromaticity coordinates is (x_r, y_r, z_r), (x_g, y_g, z_g), (x_b, y_b, z_b), z wherein_r=1-x_r-y_r, z_g=1-x_g-y_g, z_b=1-x_b-y_b

The tristimulus values of three primary light source correspondence is respectively (X_r, Y_r, Z_r), (X_g, Y_g, Z_g), (X_b, Y_b, Z_b), wherein, the Y in the tristimulus values_r, Y_g, Y_bBrightness value for three primary colors.The pass of chromaticity coordinates and tristimulus values is:

$X_r=\frac{x_r}{y_r}{Y}_r,$$X_g=\frac{x_g}{y_g}{Y}_g,$$X_b=\frac{x_b}{y_b}{Y}_b$

$Z_r=\frac{z_r}{y_r}{Y}_r,$$Z_g=\frac{z_g}{y_g}{Y}_g,$$Z_b=\frac{z_b}{y_b}{Y}_b$

The tristimulus values of synthesize white light is: X_w=X_r+ X_g+ X_b, Y_w=Y_r+ Y_g+ Y_b, Z_w=Z_r+ Z_g+ Z_b

With the white color coordinate of given colour temperature coupling be:

White color coordinate by given colour temperature coupling can obtain corresponding Y_r: Y_g: Y_b, this ratio is the three primary light source brightness ratio.

Wherein, the light-source brightness signals transmission as shown in Figure 5: after the start,display processing unit 103 reads light source original intensity value, opens display light source; Before showing every frame picture,display processing unit 103 calculates light source optimal brightness grade according to the input image content, according to this optimal brightness grade and preset white balance conditions formation base three-color light source brightness value,display processing unit 103 is handled it according to the color sensor feedack simultaneously, basic three-color light source brightness value is adjusted, and adjusted three-color light source brightness value is sent into light-source system.Wherein thestep 1 among Fig. 5 be the operation of every frame once, the data acquisition in the step 2 then is timing operation (for example, can move once in per two seconds), utilizes the cumulative effect of step 2 to reach the purpose of white balance correction.

Owing to the generation of light source white balance distortion is because reasons such as temperature rising, device electro-optical characteristic variation cause, therefore just do not go to proofread and correct when not needing every demonstration one frame picture, can go to proofread and correct once every a period of time, each amplitude of proofreading and correct should not be too big, correction amplitude too conference causes film flicker, so the accumulative total in elapsed time, light source can progressively satisfy the white balance point of our appointment.

Above embodiment only in order to the technical scheme of the explanation embodiment of the invention, is not intended to limit; Although the embodiment of the invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.

Claims (10)

1. a display processing method is characterized in that, described method comprises:

Picture brightness to input picture is added up, and generates the optimal brightness grade;

According to described optimal brightness grade and preset white balance conditions formation base three-color light source brightness value;

Read the three-color light source brightness value of the light-source system output that color sensor collects;

Judge whether described three-color light source brightness value satisfies described preset white balance conditions;

If satisfy, then described basic three-color light source brightness value directly inputed to described light-source system; If do not satisfy, then adjust the ratio of described basic three-color light source brightness value, adjusted three-color light source brightness value is inputed to described light-source system.

2. method according to claim 1 is characterized in that, described method also comprises:

Revise described preset white balance conditions; The brightness value of adjusting described basic three primary light source is to satisfy amended white balance conditions.

3. method according to claim 1 is characterized in that, the ratio of adjusting described basic three-color light source brightness value comprises: the ratio of adjusting described basic three-color light source brightness value by the brightness degree of adjusting at least one color light source in the described basic three-color light source.

4. method according to claim 3 is characterized in that, the brightness degree of adjusting at least one color light source in the described basic three-color light source comprises: the brightness degree of at least one color light source in the described basic three-color light source is improved or reduce a default grade.

5. method according to claim 1 is characterized in that, described method also comprises:

The original intensity value is set, described original intensity value is inputed to described light-source system.

6. a display processing unit is characterized in that, described device comprises:

The brightness statistics unit is used for the picture brightness of input picture is added up, and generates the optimal brightness grade; According to described optimal brightness grade and preset white balance conditions formation base three-color light source brightness value;

The white balance correction unit is used to read the three-color light source brightness value of the light-source system output that color sensor collects; Judge whether described three-color light source brightness value satisfies described preset white balance conditions; If satisfy, then described basic three-color light source brightness value directly inputed to described light-source system; If do not satisfy, then adjust the ratio of described basic three-color light source brightness value, adjusted three-color light source brightness value is inputed to described light-source system.

7. device according to claim 6 is characterized in that,

Described white balance correction unit also is used to revise described preset white balance conditions; The brightness value of adjusting described basic three primary light source is to satisfy amended white balance conditions.

8. device according to claim 6 is characterized in that,

Described white balance correction unit, the brightness degree that specifically is used for adjusting at least one color light source of described basic three-color light source is adjusted the ratio of described basic three-color light source brightness value.

9. a television set is characterized in that, described television set comprises the arbitrary described display processing unit of claim 6-8.

10. a display processing system is characterized in that, described display processing system comprises:

Display processing unit, described display processing unit comprises: the brightness statistics unit, be used for the picture brightness of input picture is added up, generate the optimal brightness grade; According to described optimal brightness grade and preset white balance conditions formation base three-color light source brightness value; The white balance correction unit is used to read the three-color light source brightness value of the light-source system output that color sensor collects; Judge whether described three-color light source brightness value satisfies described preset white balance conditions; If satisfy, then described basic three-color light source brightness value directly inputed to described light-source system; If do not satisfy, then adjust the ratio of described basic three-color light source brightness value, adjusted three-color light source brightness value is inputed to described light-source system;

Light-source system is used to receive the three-color light source brightness value that described display processing unit provides, and realizes the driving output of three-color light source;

Color sensor is used to gather the three-color light source brightness value of described light-source system output, and described brightness value is fed back to described display processing unit.

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