CN101364005A - LED arrangement method of four-primary-color LED backlight - Google Patents

Abstract

The invention relates to a LED arrangement method for a four-fundamental-color LED backlight, which includes first LEDs, second LEDs, third LEDs and fourth LEDs, wherein, the first LEDs, the second LEDs, the third LEDs and the fourth LEDs are arranged into a minimum matrix unit in the manner of multiplying 4 by 4; the number ratio of the first LEDs, the second LEDs, the third LEDs and the fourth LEDs is 1:1:1:1; and every row and every line are respectively provided with the first LEDs, the second LEDs, the third LEDs and the fourth LEDs. A, B, C and D respectively represent the first LEDs, the second LEDs, the third LEDs and the fourth LEDs.

Description

The LED arrangement method of four-primary-color LED backlight

[technical field]

The present invention relates to a kind of light emitting diode (light emitting diode; LED) arrangement method, and particularly relevant for a kind of arrangement method that is applied to the light emitting diode in the liquid crystal indicator.

[background technology]

Because that the LCD display device has is in light weight, thickness is little, advantage such as low in energy consumption, the range of application that causes the LCD display device more and more widely.LCD itself is not luminous, uses the LCD display device of LCD must use certain light source as ability backlight display frame.Light source as the LCD backlight of display device generally includes CCFL, FFL and LED etc.Compare with the FFL backlight with CCFL,, in LCD backlight of display device is in recent years used, adopt LED more and more as backlight because LED has long, low in energy consumption and free of contamination advantage of life-span.

The LED that is used to produce the LCD backlight of display device is white light LEDs or RGB three-primary color LED normally.The principle of luminosity of white light LEDs and CCFL and FFL are actually similarly, all are to shine fluorescent material and luminous by ultraviolet ray, and therefore, the spectral distribution of the spectral distribution of the light emitted line of white light LEDs and CCFL and FFL light source is similar.The characteristics of the spectral distribution of these light are all to have higher energy distribution in bigger wavelength coverage, can know from the knowledge of colorimetry, saturation degree with light source that continuous spectrum distributes is low, when using such light source as LCD display device backlight, the color reproducibility of LCD display device is lower.Generally, adopt the color reproducibility of the LCD display device of these backlights can only reach about 80% of NTSC standard.

What form contrast with CCFL, FFL and White LED backlight is that the RGB three-color LED is backlight.RGB LED and above-mentioned light source have diverse spectral distribution, they only in a very narrow wavelength coverage (as 20nm) have energy distribution.Can know that from the knowledge of colorimetry the spectral distribution of light source is concentrated more, its saturation degree is just high more, uses the high light source of three species saturations (as the LED of R, G, three kinds of colors of B) can blend more color, just has better color reproducibility.Therefore, use RGB three-primary color LED LCD display device backlight than using CCFL, FFL, white light LEDs LCD display device backlight to have better color reproducibility.

Just because of three-primary color LED backlight have than white light LEDs is backlight have a better color reproducibility, in demanding LCD display device, all adopted the RGB three-primary color LED backlight, as LCD-TV to color.

Along with the raising of people's level of consumption, require the LCD display device can show abundant colors more.Can know that from colorimetry knowledge the saturation degree that improves the RGB three-primary color LED can improve the color reproducibility of LED-backlit, suitably the LED of the more primary colours of employing also can improve the color reproducibility of LED-backlit.The former requires the further raising of LED manufacturing process, and having reached the manufacturing process that will further improve LED on the basis of higher level at present LED manufacturing process technology is the comparison difficulty.The latter does not have higher requirement to the LED manufacturing process, and the LED (as cyan LED) of other primary colours of suitable selection except that RGB can obviously improve the color reproducibility of LED-backlit.

In addition, because LED is a pointolite, each LED is installed on the LED-backlit substrate according to certain arrangement method and physical separation size.When adopting the luminous generation white backlight of multi-primary LED colour mixture, the arrangement method of each primary-color LED will influence the brightness and the uniformity of chromaticity of LED-backlit.

Fig. 1 with reference to the accompanying drawings, Fig. 1 is the matrix synoptic diagram that existing RGB primitive colours LED is arranged, and the RGB among Fig. 1 is made up of 2 * 2 matrix, and is a minimum matrix unit that repeats with this matrix, among Fig. 1, the number of green LED is respectively the twice of red LED and blue led number.

Fig. 2 with reference to the accompanying drawings, Fig. 2 is with the formed bigger matrix synoptic diagram of minimum matrix repeated arrangement shown in Figure 1.As can be seen from Figure 2, first row of this matrix only comprises R LED, G LED with first row, and does not comprise B LED; The 8th row of this matrix only comprises G LED, B LED with the 8th row, and does not comprise R LED, and therefore can produce light in this matrix edge mixes uneven problem, thereby causes brightness irregularities and chromaticity distortion problem.

[summary of the invention]

To influence the brightness and the uniformity of chromaticity of LED-backlit just because of the arrangement method of the benefit of the aforementioned multi-primary LED high color reproducibility of bringing backlight and multi-primary LED, the invention provides a kind of LED arrangement method of four-primary-color LED backlight.It can not only provide than three-primary color LED higher color reproducibility backlight, and can be in the entire backlight scope-inside of backlight area and edge-provide brightness and colourity backlight uniformly be provided.

For achieving the above object, the invention provides a kind of LED arrangement method of four-primary-color LED backlight, be applied to comprise in the Backlight For Liquid Crystal Display Panels:

An at least one LED;

At least one the 2nd LED;

At least one the 3rd LED; And

At least one the 4th LED,

Wherein, a described LED, the 2nd LED, the 3rd LED and the 4th LED are arranged into 4 * 4 minimum matrix unit, the number ratio of the one LED, the 2nd LED, the 3rd LED and the 4th LED is 1:1:1:1, and has a LED, the 2nd LED, the 3rd LED and the 4th LED respectively in each row and each row.

Three kinds of red LED, blue led and green LED that LED is respectively various array modes wherein, last a kind of LED is selected from the group that is made up of cyan LED, magenta LED, yellow led.

A described LED, the 2nd LED, the 3rd LED and the 4th LED are selected from the group that is made up of red LED, blue led, green LED and cyan LED respectively.

A described LED, the 2nd LED, the 3rd LED and the 4th LED are selected from the group that is made up of red LED, blue led, green LED and magenta LED respectively.

A described LED, the 2nd LED, the 3rd LED and the 4th LED are selected from the group that is made up of red LED, blue led, green LED and yellow led respectively.

The one LED, the 2nd LED, the 3rd LED and the 4th LED represent with A, B, C, D that respectively described minimum matrix unit is arranged as follows:

$\left[\begin{array}{cccc}A& B& C& D\\ D& A& B& C\\ C& D& A& B\\ B& C& D& A\end{array}\right].$

The one LED, the 2nd LED, the 3rd LED and the 4th LED represent with A, B, C, D that respectively described minimum matrix unit is arranged as follows:

$\left[\begin{array}{cccc}D& C& B& A\\ C& B& A& D\\ B& A& D& C\\ A& D& C& B\end{array}\right].$

The one LED, the 2nd LED, the 3rd LED and the 4th LED represent with A, B, C, D that respectively described minimum matrix unit is arranged as follows:

$\left[\begin{array}{cccc}C& D& A& B\\ A& B& C& D\\ B& A& D& C\\ D& C& B& A\end{array}\right].$

The one LED, the 2nd LED, the 3rd LED and the 4th LED represent with A, B, C, D that respectively described minimum matrix unit is arranged as follows:

$\left[\begin{array}{cccc}D& C& B& A\\ C& D& A& B\\ A& B& C& D\\ B& A& D& C\end{array}\right].$

The characteristics of the LED arrangement method of four-primary-color LED backlight of the present invention are: it can not only provide than three-primary color LED higher color reproducibility backlight, and can be in the entire backlight scope-inside of backlight area and edge-provide brightness and colourity backlight uniformly be provided.

[description of drawings]

Fig. 1 is the matrix synoptic diagram that a kind of existing RGB primitive colours LED is arranged;

Fig. 2 is the matrix synoptic diagram that another kind of existing RGB primitive colours LED is arranged;

Fig. 3-the 4th, the matrix synoptic diagram that four primary-color LEDs of preferred embodiment of the present invention are arranged;

Fig. 5-the 7th, the matrix synoptic diagram that four primary-color LEDs of another preferred embodiment of the present invention are arranged.

[embodiment]

The present invention is described in detail below in conjunction with accompanying drawing.

Fig. 3 and Fig. 4 with reference to the accompanying drawings the invention provides a kind of LED arrangement method of four-primary-color LED backlight, are that white light is mixed out on the basis with four primary colours.The one LED, the 2nd LED, the 3rd LED and the 4th LED are arranged into 4 * 4 minimum matrix unit, and the number ratio of a LED, the 2nd LED, the 3rd LED and the 4th LED is: 1:1:1:1.A described LED, the 2nd LED, the 3rd LED and the 4th LED can be arranged in arbitrarily on the optional position of 4 * 4 minimum matrix unit, and have a LED, the 2nd LED, the 3rd LED and the 4th LED respectively in each row and each row.

Three kinds of red LED, blue led and green LED that LED is respectively various array modes wherein, for example, the one LED, the 2nd LED, the 3rd LED can be respectively red LED, blue led and green LED, perhaps red LED, green LED and blue led, perhaps blue led, red LED and green LED, perhaps blue led, green LED and red LED, perhaps green LED, red LED and blue led, perhaps green LED, blue led and red LED; And the 4th LED is cyan LED, magenta LED, yellow led any one.

A described LED, the 2nd LED, the 3rd LED and the 4th LED are selected from the group that is made up of red LED, blue led, green LED and cyan LED respectively.The one LED, the 2nd LED, the 3rd LED and the 4th LED represent in matrix unit minimum among Fig. 3 and Fig. 4, to have a LED, the 2nd LED, the 3rd LED and the 4th LED respectively respectively with A, B, C, D.

Need to prove that in the present invention, a LED, the 2nd LED, the 3rd LED and the 4th LED represent with A, B, C, D that respectively that is: a LED can be any among A, B, C, the D, for example D; At this moment, the 2nd LED can be any among A, B, the C, for example C; At this moment, the 3rd LED can be any among A, the B, for example A; Then the 4th LED adopts B to represent.That is to say that a LED, the 2nd LED, the 3rd LED and the formed combination of the 4th LED are A, B, the formed combination of C, D; The one LED, the 2nd LED, the 3rd LED and the 4th LED can be A, B, C, D, also can be B, A, C, D, can also be B, C, A, D, or C, A, D, B or the like.

In this example, a LED, the 2nd LED, the 3rd LED and the 4th LED are respectively red LED, blue led, green LED, cyan LED; Perhaps, be blue led, red LED, green LED, cyan LED respectively; Perhaps, be green LED, blue led, red LED, cyan LED respectively; Perhaps, also can be blue led, green LED, red LED, cyan LED or the like array mode respectively.

Fig. 5, Fig. 6 and Fig. 7 with reference to the accompanying drawings the invention provides a kind of LED arrangement method of four-primary-color LED backlight, are that white light is mixed out on the basis with four primary colours.The one LED, the 2nd LED, the 3rd LED and the 4th LED are arranged into 4 * 4 minimum matrix unit, and the number ratio of a LED, the 2nd LED, the 3rd LED and the 4th LED is: 1:1:1:1.A described LED, the 2nd LED, the 3rd LED and the 4th LED can be arranged on the optional position of 4 * 4 minimum matrix unit arbitrarily and have a LED, the 2nd LED, the 3rd LED and the 4th LED respectively in each row and each row.

A described LED, the 2nd LED, the 3rd LED and the 4th LED are selected from the group that is made up of red LED, blue led, green LED and yellow led respectively.The one LED, the 2nd LED, the 3rd LED and the 4th LED represent in matrix unit minimum among Fig. 3 and Fig. 4, to have a LED, the 2nd LED, the 3rd LED and the 4th LED respectively respectively with A, B, C, D.

By above embodiment the present invention is disclosed, but scope of the present invention is not limited thereto, under the condition that does not depart from the present invention's design, more than each element, scheme can replace with similar or equivalent element, scheme that affiliated technical field personnel understand.

Claims (9)

1. the LED arrangement method of a four-primary-color LED backlight is applied to it is characterized in that in the Backlight For Liquid Crystal Display Panels, comprises:

An at least one LED;

At least one the 2nd LED;

At least one the 3rd LED; And

At least one the 4th LED,

Wherein, a described LED, the 2nd LED, the 3rd LED and the 4th LED are arranged into 4 * 4 minimum matrix unit, the number ratio of the one LED, the 2nd LED, the 3rd LED and the 4th LED is 1:1:1:1, and has a LED, the 2nd LED, the 3rd LED and the 4th LED respectively in each row and each row.

2. the LED arrangement method of four-primary-color LED backlight as claimed in claim 1, it is characterized in that: three kinds of red LED, blue led and green LED that LED is respectively various array modes wherein, last a kind of LED is selected from the group that is made up of cyan LED, magenta LED, yellow led.

3. the LED arrangement method of four-primary-color LED backlight as claimed in claim 1, it is characterized in that: a described LED, the 2nd LED, the 3rd LED and the 4th LED are selected from the group that is made up of red LED, blue led, green LED and cyan LED respectively.

4. the LED arrangement method of four-primary-color LED backlight as claimed in claim 1, it is characterized in that: a described LED, the 2nd LED, the 3rd LED and the 4th LED are selected from the group that is made up of red LED, blue led, green LED and magenta LED respectively.

5. the LED arrangement method of four-primary-color LED backlight as claimed in claim 1, it is characterized in that: a described LED, the 2nd LED, the 3rd LED and the 4th LED are selected from the group that is made up of red LED, blue led, green LED and yellow led respectively.

6. the LED arrangement method of four-primary-color LED backlight as claimed in claim 1 is characterized in that: a LED, the 2nd LED, the 3rd LED and the 4th LED represent with A, B, C, D that respectively described minimum matrix unit is arranged as follows:

$\left[\begin{array}{cccc}A& B& C& D\\ D& A& B& C\\ C& D& A& B\\ B& C& D& A\end{array}\right].$

7. the LED arrangement method of four-primary-color LED backlight as claimed in claim 1 is characterized in that: a LED, the 2nd LED, the 3rd LED and the 4th LED represent with A, B, C, D that respectively described minimum matrix unit is arranged as follows:

$\left[\begin{array}{cccc}D& C& B& A\\ C& B& A& D\\ B& A& D& C\\ A& D& C& B\end{array}\right].$

8. the LED arrangement method of four-primary-color LED backlight as claimed in claim 1 is characterized in that: a LED, the 2nd LED, the 3rd LED and the 4th LED represent with A, B, C, D that respectively described minimum matrix unit is arranged as follows:

$\left[\begin{array}{cccc}C& D& A& B\\ A& B& C& D\\ B& A& D& C\\ D& C& B& A\end{array}\right].$

9. the LED arrangement method of four-primary-color LED backlight as claimed in claim 1 is characterized in that: a LED, the 2nd LED, the 3rd LED and the 4th LED represent with A, B, C, D that respectively described minimum matrix unit is arranged as follows:

$\left[\begin{array}{cccc}D& C& B& A\\ C& D& A& B\\ A& B& C& D\\ B& A& D& C\end{array}\right].$

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