CN103728773A - Arrangement method of four-primary color LED backlight light-emitting units - Google Patents

Abstract

The invention relates to an arrangement method of four-primary color LED backlight light-emitting units. The method includes: arranging first LEDs, second LEDs, third LEDs and fourth LEDs into a 4*4 minimum matrix unit according to the LED number ratio of 1:1:1:1. The method has the advantages that color reproductivity of the four-primary color LED backlight light-emitting units is higher than that of three-primary color LED backlight and the whole backlight range, including the interior of backlight area and edge, can be provided with uniform brightness and chromaticity backlight.

Description

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

Technical field

The present invention relates to the arrangement method of a kind of light emitting diode (LED), and relate to especially a kind of arrangement method that is applied to the backlight module light emitting diode in liquid crystal indicator.

Background technology

Due to LCD display device have lightweight, thickness is little, the advantage such as low in energy consumption, causes the range of application of LCD display device more and more extensive.LCD itself is not luminous, uses the LCD display device of LCD must use certain light source as ability backlight display frame.As the light source of LCD backlight of display device, generally include CCFL, FFL and LED etc.Compared with FFL backlight, because LED has long, low in energy consumption and free of contamination advantage of life-span, in LCD backlight of display device application in recent years, adopt more and more LED as backlight with CCFL.

For generation of normally white light LEDs or the RGB three-primary color LED of LED of LCD backlight of display device.The principle of luminosity of white light LEDs and CCFL and FFL are actually similarly, are all to irradiate 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 feature of the spectral distribution of these light is in larger wavelength coverage, all to have higher energy distribution, from the knowledge of colorimetry, can know, there is the saturation degree of light source that continuous spectrum distributes low, while using such light source as LCD display device backlight, the color reproducibility of LCD display device is lower.Under normal circumstances, adopt the color reproducibility of the LCD display device of these backlights can only reach 80% left and right of NTSC standard.

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

Just because of three primary color LED backlight, have than white light LEDs is backlight and there is better color reproducibility, color being required to all adopted RGB three primary color LED backlight in high LCD display device, as LCD-TV.Along with the raising of people's level of consumption, requiring LCD display device can show abundanter color can know from colorimetry knowledge, the saturation degree that improves RGB three-primary color LED can improve the color reproducibility of LED-backlit, suitably adopts the LED of more primary colours also can improve the color reproducibility of LED-backlit.The former requires the further raising of LED manufacturing process, and it is more difficult at current LED manufacturing process technology, having reached the manufacturing process that will further improve LED on the basis of higher level.The latter couple

LED manufacturing process does not have higher requirement, and suitable selection LED (as cyan LED) of other primary colours except RGB can obviously improve the color reproducibility of LED-backlit.

In addition, because LED is pointolite, each LED is arranged on 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 affect brightness and the uniformity of chromaticity of LED-backlit.

With reference to accompanying drawing 1, Fig. 1 is the matrix schematic diagram that existing RGB primitive colours LED is arranged, and the RGB in Fig. 1 is comprised of 2 × 2 matrix, and take this matrix as a minimum matrix unit that repeats, in Fig. 1, the number of green LED is respectively the twice of red LED and blue led number.

With reference to accompanying drawing 2, Fig. 2 is the larger matrix schematic diagram so that minimum matrix repeated arrangement is formed shown in Fig. 1.As can be seen from Figure 2, the first row of this matrix and first row only comprise RLED, GLED, and do not comprise BLED; The 8th row of this matrix and the 8th row only comprise GLED, BLED, and do not comprise R LED, and therefore can produce light in this matrix edge mixes inhomogeneous problem, thereby causes brightness irregularities and chromaticity distortion problem.

Summary of the invention

Just because of the benefit of backlight the brought high color reproducibility of aforementioned multi-primary LED and the arrangement method of multi-primary LED, will affect brightness and the uniformity of chromaticity of LED-backlit, the invention provides a kind of luminescence unit arrangement method of four-primary-color LED backlight.It can not only provide the color reproducibility higher than three primary color LED backlight, and can be in whole scope backlight-inside of backlight area and edge-provide brightness and colourity backlight be uniformly provided.Minimum matrix unit, the number of a LED, the 2nd LED, the 3rd LED and the 4th LED is than being 1:1:1:1, and has respectively a LED, the 2nd LED, the 3rd LED and the 4th LED in every a line and each row.

Wherein three kinds of red LED, blue led and green LED that LED is respectively various array modes, last a kind of LED is selected from the group being comprised of cyan LED, magenta LED, yellow led.

A described LED, the 2nd IED, the 3rd LED and the 4th LED are selected from respectively the group being comprised of red LED, blue led, green LED and cyan LED.

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

A described LED, the 2nd LED, the 3rd LED and the 4th IED are selected from respectively the group being comprised of red LED, blue led, green LED and yellow led.

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

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

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

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

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

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

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

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

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

Accompanying drawing explanation

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

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

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

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

Embodiment

Below in conjunction with accompanying drawing, the present invention is described in detail.

With reference to accompanying drawing Fig. 3 and Fig. 4, the invention provides a kind of luminescence unit arrangement method of four-primary-color LED backlight, take four primary colours, as basis, mix out white light.The one LED, the 2nd LED, the 3rd LED and the 4th LED, be 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 4 × 4 the optional position of minimum matrix unit, and have respectively a LED, the 2nd LED, the 3rd LED and the 4th LED in every a line and each row.

Wherein three kinds of red LED, blue led and green LED that LED is respectively various array modes, for example, the one LED, the 2nd LED, the 3rd LED can be respectively red LED, blue led and green LED, or red LED, green LED and blue led, or blue led, red LED and green LED, or blue led, green LED and red LED, or green LED, red LED and blue led, or 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 respectively the group being comprised of red LED, blue led, green LED and cyan LED.The one IED, the 2nd LED, the 3rd LED and the 4th LED represent respectively, in matrix unit minimum in Fig. 3 and Fig. 4, to have respectively a LED, the 2nd LED, the 3rd LED and the 4th LED with A, B, C, D.

It should be noted that, in the present invention, a LED, the 2nd LED, the 3rd LED and the 4th LED represent with A, B, C, D respectively, that is: a LED can be any in A, B, C, D, for example D; Now, the 2nd LED can be any in A, B, C, for example C; Now, the 3rd LED can be any in A, B, for example A; The 4th LED adopts B to represent.

That is to say that the combination that a LED, the 2nd LED, the 3rd LED and the 4th LED form is the combination that A, B, C, D form; The one LED, the 2nd LED, the 3rd LED and the 4th LED can be A, B, C, D, can be also B, A, C, D, can also be B, C, A, D, or C, A, D, B etc.

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; Or, be respectively blue led, red LED, green LED, cyan LED; Or, be respectively green LED, blue led, red LED, cyan LED; Or can be respectively also blue led, green LED, red LED, cyan LED etc. array mode.

With reference to accompanying drawing Fig. 5, Fig. 6 and Fig. 7, the invention provides a kind of four primary colours IED LED arrangement method backlight, take four primary colours, as basis, mix out white light.The one IED, the 2nd LED, the 3rd LED and the 4th LED, be 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 respectively a LED, the 2nd LED, the 3rd IED and the 4th LED in every a line and each row.

A described LED, the 2nd LED, the 3rd LED and the 4th LED are selected from respectively the group being comprised of red LED, blue led, green LED and yellow led.The one LED, the 2nd LED, the 3rd LED and the 4th LED represent respectively, in matrix unit minimum in Fig. 3 and Fig. 4, to have respectively an IED, the 2nd LED, the 3rd LED and the 4th LED with A, B, C, D.

By above embodiment, the present invention is disclosed, but scope of the present invention is not limited to this, is not departing under the condition of the present invention's design, similar or equivalent element, scheme that above each element, scheme can be understood with affiliated technical field personnel are replaced.

Claims (6)

1. the luminescence unit arrangement method of a four-primary-color LED backlight, it is characterized in that comprising an at least one LED, at least one the 2nd LED, at least one the 3rd LED, and at least one the 4th IED, 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 respectively a LED, the 2nd LED, the 3rd LED and the 4th LED in every a line and each row.

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

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

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

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

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

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

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

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

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

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