CN102254519A - Three-color light-emitting diode (LED) direct backlight control method for three-dimensional (3D) display - Google Patents

Abstract

The invention provides a three-color light-emitting diode (LED) direct backlight control method for three-dimensional (3D) display. By the method, the degree of separation of a left eye picture and a right eye picture is detected to determine a scene depth range, so that backlight colors and luminance values are output in areas according to the scene depth range, and the aim of providing a truer and more obvious visual effect for a 3D display picture is fulfilled.

Description

A kind of three-color LED downward back light control method that is used for the 3D demonstration

Technical field

The present invention relates to 3D display technique field, relate in particular to the three-color LED downward back light control method that a kind of 3D of being used for shows.

Background technology

The LCD display technique need realize Presentation Function by backlight as a kind of non-self luminous display technique.Along with the continuous development of lcd technology, the LCD particularly application of colour liquid crystal display device is also constantly being widened.Spurred by the market of LCD, the backlight industry also presents a scene of prosperity.The LED-backlit source is divided into two kinds according to the unusual of light source placement location, and a kind of is the side light type LED back light source, and a kind of is direct LED backlight.It is thin that the characteristics in sidelight (going into) formula LED-backlit source are that backlight can be done, and cost is low, but the white brightness lack of homogeneity.The characteristics of direct LED backlight are the white brightness good uniformities, can carry out the subregion dynamic light adjustment, but that backlight can not be done is thin, the cost height.

The 3D display technique is at present just flourish, product on sale is numerous on the market, to become one of mainstream technology of TV foreseeable future, will combine with the three-color LED backlight technology, obtain to improve at aspects such as performance, power consumptions, especially straight-down negative three-color LED backlight technology is more suitable for the 3D picture and shows.

Summary of the invention

The purpose of this invention is to provide the three-color LED downward back light control method that a kind of 3D of being used for shows, this method can either be carried out subregion dynamic adjustments color and brightness, also can provide more real visual effect for 3D display frame.

For achieving the above object, the technical solution used in the present invention is: a kind of three-color LED downward back light control method that is used for the 3D demonstration, and it carries out according to following operation steps:

Step 1: start is lighted according to the brightness driving white LED lamp of reset values;

Step 2: the control device FPGA of control module reads the vision signal of video decode plate, i.e. the vision signal of video signal processing unit, as be found to be the 3D vision signal, open 3D algorithm backlight;

Step 3: control device FPGA detects video signal data, right and left eyes picture degree of separation is compared, thereby determine field depth, the degree of separation height is prospect, detects each pixel color of foreground picture, drives corresponding region three-color LED demonstration corresponding color backlight, improve the picture color saturation degree, the low distant view that is of degree of separation, three-color LED is backlight directly with white output, and reduces certain proportion brightness than reset values;

Step 4: control device FPGA carries out color, brightness value processing according to the field depth subregion;

Step 5: control device FPGA will calculate good drive signal value and output in the LED chip for driving, drive three-color LED light and light.

The three-color LED downward back light control method that is used for the 3D demonstration provided by the invention, detect by degree of separation the right and left eyes picture, determine field depth, thereby export color backlight and brightness value, initiatively improve picture contrast and foreground picture saturation degree according to the field depth subregion.By improving contrast, the saturation degree between the field depth of display frame front and back, can obtain stronger image stereoscopic sensation with respect to existing 3D display technique this method.Being reached for 3D display frame provides the purpose of truer more obvious visual effect.

Description of drawings

Fig. 1 is used for the three-color LED downward back light control method block diagram that 3D shows;

Fig. 2 is the picture after adopting method of the present invention and compensating and the overall contrast design sketch of undressed picture;

Fig. 3 is the enlarged drawing of the local part among Fig. 2.

Embodiment

Please refer to Fig. 1, a kind of three-color LED downward back light control method that 3D shows that is used for according to the invention, it carries out according to following steps:

Step 1: start is lighted according to the brightness driving white LED lamp of reset values.

Step 2: the control device FPGA of control module reads the vision signal of video decode plate, i.e. the vision signal of video signal processing unit, as be found to be the 3D vision signal, open 3D algorithm backlight (carrying out step 3-5).

Step 3: control device FPGA detects video signal data, right and left eyes picture degree of separation is compared, thereby determine field depth, the degree of separation height is prospect, detects each pixel color of foreground picture, drives corresponding region three-color LED demonstration corresponding color backlight, improve the picture color saturation degree, the low distant view that is of degree of separation, three-color LED is backlight directly with white output, and reduces certain proportion brightness than reset values.

Step 4: control device FPGA carries out color, brightness value processing according to the field depth subregion.

Step 5: control device FPGA will calculate good drive signal value and output in the LED chip for driving, drive three-color LED light and light.

Fig. 2 and Fig. 3 two width of cloth image the first half are the raw frames without the compensation of row this method, and the latter half is the picture after compensating through the inventive method.As can be seen from Figures 2 and 3, adopt the picture after the inventive method compensates, contrasting as can be seen with the raw frames that compensates without row this method, picture effect has had obvious improvement.Improve contrast, the saturation degree between field depth before and after the picture by the inventive method, obtain stronger image stereoscopic sensation, thereby provide truer more obvious visual effect for 3D display frame.

The embodiment that the above non-the present invention is whole or unique, the conversion of any equivalence that those of ordinary skills take technical solution of the present invention by reading instructions of the present invention is claim of the present invention and contains.

Claims (1)

1. one kind is used for the three-color LED downward back light control method that 3D shows, it is characterized in that, comprises following operation steps:

Step 1: start is lighted according to the brightness driving white LED lamp of reset values;

Step 2: the control device FPGA of control module reads the vision signal of video decode plate, i.e. the vision signal of video signal processing unit, as be found to be the 3D vision signal, open 3D algorithm backlight;

Step 3: control device FPGA detects video signal data, right and left eyes picture degree of separation is compared, thereby determine field depth, the degree of separation height is prospect, detects each pixel color of foreground picture, drives corresponding region three-color LED demonstration corresponding color backlight, improve the picture color saturation degree, the low distant view that is of degree of separation, three-color LED is backlight directly with white output, and reduces certain proportion brightness than reset values;

Step 4: control device FPGA carries out color, brightness value processing according to the field depth subregion;

Step 5: control device FPGA will calculate good drive signal value and output in the LED chip for driving, drive three-color LED light and light.

Images