TWI324270B - High color gamut liquid crystal display - Google Patents

Description

1324270

Nine, the invention description: [Technical field to which the invention belongs] • The present invention relates to a liquid crystal display that exhibits a color expression, in particular, a backlight that can utilize a non-fluorescent tube to conform to the human eye. A liquid crystal display that requires color performance. [Prior Art] A thin transistor-liquid crystal display module (TFT-LCD module) has been widely used in a wide variety of displays. However, due to the influence of the color filter of the TFT_LCD module and the optical characteristics of the liquid crystal, the color performance of the module is not saturated, so the high-color woven of the TFT-LCD model (c〇1〇) r reproduction) is one of the important characteristic parameters. Therefore, international standards have developed a variety of color specifications (such as NTSC, TCO, PAL, CIE, ..., etc.) to enable TFT-LCD modules and groups to provide and meet better color parameters. However, current TFT-LCD The backlight used in the module is a cathode fluorescent tube, which leads to the financial face of the TFT-LCD module. Tdevisi〇n (five) lion

The Committee's National Television System Committee has a ratio of 75%, and the performance of color saturation is insufficient. In order to meet the demand for time-of-manufacturers are committed to the development of high-color reproduction technology, which can achieve the goal of improving NTSC by changing the number of possible back-light sources and back-light sources. In general. 'We can use a variety of light-emitting components as a backlight, but the current non-flash tube _ silk hide, make the _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ The color filter of the heart is called the color filter of red, green and blue (RGB) when the non-coffee light source is used, which affects the (four) coordinates and color temperature of the LCD and also affects the color gamut. As shown in the seventh chart, when the LCD backlit lion CFL backing wire is changed to a non-CFL backlight, the blue color coordinates will shift in the direction of poor color purity, because of the f color gamut and the obvious perception of the human eye. SUMMARY OF THE INVENTION The gist of the present invention is to coordinate the color filter color of the color filter with the spectrum of the backlight, and to enable the performance color gamut 1 of Dasda to meet the needs of the human eye & the present. The liquid crystal display comprises a plurality of color filters of red, green and blue color and a backlight, and the spectrum of the color filter must conform to the following relationship: 540 2] 5L(A)x CFBhie(X) AX < 2.0 490 where BL(X) is normalized (normaiized, the backlight is the strongest Set to about 1.0) after the light source. CFBlue is the transmittance of the blue color pigment filter. The product of the two is in the wavelength range of about 490 nm (nm) to 54 〇 nanometer (leg) Between the two, it must be substantially less than or substantially equal to 2 0, that is, the blue dot coordinates can be met. In addition, the backlight backlight intensity BL(X) can be normalized by other values, but it should still conform to the above formula. In order to make the blue dot coordinates meet the requirements. [Embodiment] According to the human eye's demand for color performance, the International Standards Organization defines several color gauges, and the present invention is based on TCO, 03 (Swedish Professional Staff Union Environmental Standard) The standard specification of the chapter is Fan Yu's other standard specifications can also be used, such as: H, or other international standard specifications, and the red, green and blue color seats of these fresh specifications I It is also applicable to the requirements of Table i. According to TC(10)3, the red, green and blue color coordinates (u, v,), and C positive (9) i color coordinates (Chr〇matidtydiagram) The conversion relationship of the coordinate value (4) is: u5 = 4x/(-2x+ 12y + 3) ν'= 9y / (-2x + 12y + 3)

Table 1 The liquid transducing device of the present invention comprises - a plurality of red, green and blue scorpion colors, a high beam, and a day-to-day sigh-back vehicle. Shooting backlight _ is a non-CFL backlight. The backlight comprises at least two different color light-emitting elements or white light-emitting elements 1324270 pieces, which may further comprise another-color light-emitting element, and the color of which is similar to the color of the present embodiment. The light-emitting element and the blue-light (9) light-emitting element are exemplified to emit light having a predetermined light. The lighter of the other 'colors' (four) and the white light, which has a predetermined color temperature, such as white, yellow-green, orange-red, blue-green, etc. Furthermore, the 'light-emitting element system includes a light-emitting diode (C), a ^e-cut, an organic electro-luminous element (FEEL), a field emission device (FED), or the like. In this example, the light-emitting diode is thin, so that the bile light is called the LED backlight. If the backlight of the organic light-emitting element is used, it is called the 〇ELD backlight. If the backlight of the electroluminescent element is used, It is called an FED backlight. After receiving the driving current of the control unit, the RGB emitting component emits light of a predetermined wavelength, and after passing the color, the optical module emits a white color having a predetermined color temperature. Its spectrum has the following characteristics' blue wavelength range is about 430 nm to 480 nm, green peak range; from 500 nm to 550 nm, the red peak range is about 600 _ to 65 〇 nm. Since the chromaticity of the liquid crystal display depends on the spectrum of the backlight and the transmittance of the color filter, in order to prevent the blue color of the liquid crystal display from being changed from a CFL backlight to a non-CFL backlight (eg, an LED backlight) Making the coordinates of the point offset, even deviating from the definition of the standard specification (eg, TCO, 〇 3), in a preferred embodiment of the invention 'a liquid crystal display using an LED backlight, (eg, a thin film transistor liquid crystal display) (TFT_LCD), low temperature polycrystalline germanium liquid crystal display (LTPS-LCD), or other similar liquid crystal display), the spectrum of the color filter must conform to the following relationship: 540 5401324270 Σ5φ)χ^Ακ(Λ)ΔΛ<2.0 490 Among them, BL(X) is a light source that is normalized (normalized 'the maximum intensity of the backlight is set to about 1.0). CFBhje is the transmittance of the blue color pigment filter. The product of the two with the unit wavelength and between about 490 nm and about 540 nm in the wavelength range must be substantially less than or substantially equal to 2.0, i.e., the blue dot coordinates are desirable. The intensity of the backlight BL(X) can also be normalized by other values, but should still conform to the above formula so that the blue dot coordinates are satisfactory. To satisfy the formula of the present invention, the blue dot coordinates can be made desirable by changing the spectrum of the backlight, the transmittance of the blue color filter, and the like. It is known that the transmittance of the color filter that changes the blue color is an example, and how to make the liquid crystal display 7F H seam & not change from the CFL back system to the LED material position, so that the dot coordinates are shifted. Referring to Table 2-1 and Table 2-2, Figure 2-1 and Table 2-2 show two embodiments of the present invention. Taking the first embodiment as an example, '#1 backlight spectrum, which is the luminance value of each wavelength;” The normalized #1 moonlight spectrum is normalized after the backlight spectrum is normalized (n〇rmalized to about a large brightness). The luminance value of each wavelength; the product of the first embodiment is the product of the luminance value of each wavelength after the backlight spectrum is normalized and the transmittance of the preferred blue color filter;" The product of the transmittance of the color filter of the color element and the normalized spectrum of the #1 moonlight spectrum is the brightness of each wavelength after the normalization of the backlight spectrum, and the color filter of the known blue color is penetrated by the color filter W. The product of the rate. From Table 2 (including Table 2-1 and S 2·2), it can be known that 'when the maximum brightness value of the spectrum of the backlight is set to about 1.0', the backlight _ spectral brightness and the transmittance of the preferred blue color film are The sum of products in the wavelength range from about 490 nm to about 540 m is about i 471; when the maximum brightness of the spectrum of the backlight is about 10, the light source _ spectral brightness and the penetration of the conventional blue color filter The rate of the product in the wavelength range from about 490 nm to about 540 nm is about 3.704. *1 Cargo light frequency food m2 Normalization of cargo light spectrum *1 Backlight frequency error ΪΕRegularization • 2 The cost of blue light filter is better than the blue color filter Through the first treasure example, the first back example of the multi-ranking rule 隹& color filter wear rate and the normalization of the 光 光 光 光 蓝色 蓝色 蓝色 蓝色 蓝色 蓝色 蓝色The t-rate of the light sheet is normalized to the product of the light-duty dish 1.471 1.149 2.907 490 0.01594 0.01364 0.07641 0.05954 0.449M .0.653 0.03432 0.02674 lilitBBH 0.038S9 49! 0.01617 0.01372 0.07752 0.05988 0.434 Μ 0.644 0.03365 0.02599 0.04993 0.03857 4.92 0.0 J 659 0.01395 0.07953 0.06087 0.41913 0.635 0.03333 0.02551 0.05051 0.03866 "493 0.01713 0.Ό 1430 0.08212 0.06242 0.40413 0.626 0.03319 0.02522 0.05142 0.0390S '494 0.01786 0.01485 ΙιΙι^Μ 0.06482 0.38913 0.617 0.03332 0.02522 0.05284 0.04000 '495 0.01870 0.01547 ΙΙΙ): ί; ΙΚ1 0.06749 0*37412 0.608 0.03354 0.02525 0.05452 0.04105 496- 0,0 J 968 0.01621 ΚίΧ ΐΚΈΚΐΙ 0.07076 0.35912 0597 0.03388 0.02541 0.05633 0.04225 —49 Factory 0.02084 0.01714 • Pengyan 0.07480 034412 0*586 0.03438 0.02574 0.05855 0.04384 498 0.02218 0.01824 ΙΙ·ΙΙΙΚ<1 0.07959 0^2912 0*575 0.03499 0.02619 0.06114 0.04576 499 0.02366 0.01947 I1IK2KJ 0.08497 0 *31412 0564 0.03563 0.02669 0.06396 0.04792 500 0.02528 0.02087 0.12119 0.09106 0*29912 0553 0.03625 0.02724 0.06700 0.05035 501 0.02712 0.02243 CU30CH 0.09788 028563 0.540 0.03713 0.02796 0.07018 0.05284 502 0.02913 0.024 Μ 0.13965 0.10536 0.27213 0.527 0.03800 0.02867 0.07356 0.05550 503 0.03131 0.02608 0.15010 0.11379 0^ 586^ 0.514 0.03882 0.02943 0.07711 0.05846 504 0.03375 0.02818 0.16179 0.12296 0.245 Μ 0.501 0.03966 0.030 U 0.08100 0.06156 505 0.03646 0.03047 0_17叮8 0.13296 0.23164 0.488 0.04049 0.03080 0.08523 0.064S3 506 0.03932 0.03293 0.18849 0.14371 0.22008 0.473 0.04 Μ8 0.03163 0.08915 0.06797 507 0.04242 0.03562 0.20336 0.15545 0.20851 0.458 0.04240 0.03241 0.09320 0.07124 &quo t;508 0.04549 0.03839 0.21807 0.16751 0.19694 0.444 0.04295 0.03299 0.09675 0.07432 509 0.04864 0.04132 0.23317 0.18032 0.18537 0.429 0.04322 0.03343 0.10003 0.07736 510 0.05208 0.04441 0.24966 0.19379 0.17381 0.4 Η 0.04339 0.03368 0.10345 0.08030 511 0.05603 0.04760 0.26860 0.20770 0. (6336 0.399 0.04388 0.033931 0.10708 0.08281 512 Hi Η.Ί ItXlWIKI IW ΐυΚΜΙ ΐυΚΜΙ 83 0.383 0.04411 0.03390 0.11046 0.08489 513 IiJUl«别Τ·面ill i·Miao shed ικ Measure KillMiJ 0.357 0.04387 0.03358 0.11307 0.08654 5丨彳·ΙΙΓ:η!ϋΐΜΐΙΙΪΤΐΚ«·ΐΚ 7£1 0^52 0.04303 0.03296 0.11456 |ιΙι!:Μ1 "515 mumg CE^I mai^ri 0.335 Q.04168 Q.Q3201 0.11511 0.08841' 11 1324270 515 0.07146 0.06029 113⁄43⁄43⁄4 0.26311 0.336 1«ΙΐΏίϊ^ 0.03201 0.1)511 Iim tearing 516 0.07480 0.06334 0.27640 0*320 0.0311] 0.11490 517 0.07807 0.06624 0.37426 0.28903 0.10341 0*305 0.03870 0.02989 i 0.11237 IlVlT:f:«KI ΜΦΙΙ^ΪΜ 518 0.08104 0.06890 0^8849 0.30068 0.09427 0.28D 0.036 63 0.028351 0.10980 519 0.08370 0.07 Ml 0.40125 0^116^ 0.08514 0*274 0.03416 III Like [n 0.10980 0.0B528 520 0.08591 0.7373 0.^1184 0.32175 0.0760! 0.258 0.03130 0.10628 0.08303 521 0.08776 0.07586 0.42071 0.33103 0.06980 0*244 0.02937 KIIIKJRTJ 0.10250 0.08065 522 0.08916 0.07772 0.42742 033916 0.06359 (K229 0.02718 0.09796 0.07773 523 0.09013 0.07937 0.43207 034636 0.05739 0>2I5 0.02480 0.01988 0.09279 0.07438 53⁄4 0.09062 0.08078 0.43442 03525! 0.05118 0200 0.02223 0.0I8CM 0.08703 0.07062 525 0.09101 0.08196 0.43629 0.35767 0.04497 0.186 0.01962 0.01609 0.08110 0.06649 526 0.09123 0.08289 0.43734 036174 0.04215 0.174 0.01844 0.01525 0.07602 0.06288 527 0.09109 0.08355 0.43667 036461 0.03933 0.162 0.0 丨718 0.0ΪΑ34 0.07063 0.05898 528 0.09073 0.08386 0.43495 036595 0.03651 0.150 6.01588 0.01338 0.06511 0.05478 529 0.08995 0.08389 0.4312! 036610 0.03370 0.138 0.01453 0.0123⁄4 0.0593^ 0.05038 530 0.08895 0.08367 0.4264! 0.36512 0.03088 0.126 0.01317 0.01127 0.05354 0.045 84 531 0.08777 0.083 Μ 0.42076 036283 0.02916 0.117 0.01058 0.0备0.0^231 532 0.08648 0.08236 0.41457 0.35940 0.02744 0.108 0.00986 0.04464 0.03870 533 0.08515 0.08116 0.40820 0*35418 0.02573 0.099 1WI1WI1 0.00911 0.04031 0.03498 534 0.063&4 0.07975 0.40096 034801 0.0240! 0.090 0.00836 0.03601 0.03126 535 0.06198 0.07807 039300 034069 0.02229 0.081. 0.00876 0.00759 0.03179 0.02756 536 0.08020 0.07620 0*38447 0*33251 0Ό2104 0.074 0.00809 0.00700 0.02858 0.02472 537 0.07822 0.07413 0J37498 032348 0.01960 0.068 0.00742 0.00640 0.02543 0.02193 538 0.07617 0.07201 0^6515 031423 0.01855 0.061 0.00677 0.00583 0.02237 0.01925 539 0.07406 0.06977 0*35503 030445 0.01730 0.055 0.00614 0.00527 0.01943 0.01666 540 0.07177 0.06742 0J4406 0.29420 0.01605 0.0 Ming "0.00552 "6.00472 0.0ί658 0.01418 Table 2-2 Taking the second embodiment as an example,, #2 backlight spectrum , for the brightness value of each wavelength;,, the normalized #2 backlight spectrum '' is the backlight spectrum normalization (1101131 welcome 2 < 1 is the most bright The luminance value of each wavelength after the second embodiment; the product of the second embodiment is the product of the luminance value of each wavelength after the normalization of the backlight spectrum and the transmittance of the color filter of the preferred blue halogen; The product of the transmittance of the conventional blue color filter and the normalized #2 backlight spectrum, the brightness value of each wavelength after the backlight spectrum is normalized, and the color filter of the known blue color. The product of the transmittance of the light sheet. It can be known from Table 2 (including Table 2_丨. and Table 2-2) that when the maximum brightness value of the spectrum of the backlight is set to about 1 〇, the frequency of the backlight and the blue color of the backlight are The color product (10) transmittance in the wavelength range of about 490 rnn. to about 540 的 product sum is about u43; when the backlight _ spectrum maximum brightness value is set to about L (), the spectral brightness of the f source and the known blue The color filter of the colorimetric color filter has a product ratio of about 2.907 in the wavelength range of about 邮 to about 54 〇 (4). 12 Figure 2 shows the f-light spectrum of the first paste and the liquid crystal display, the transmittance of the color filter, 1.0, and the maximum brightness value of the backlight is set to 490 nm to about 540. The product of the penetration rate in the wavelength range about 辛 之 Γ quot quot quot 即 即 即 quot quot quot quot quot quot quot quot quot quot 乘 乘 乘 乘 乘 乘 乘 乘 乘 乘 乘 乘 乘 乘 乘 乘 乘 乘 乘 乘 乘 乘 乘 乘 乘 乘,. For example, in the second, in the case of the color of the color; the blue penetration rate of the thinking 1 is the wavelength of the blue penetration, and the peak of the green penetration of the color filter # Wavelengths with short wavelengths of green penetration are consistent, ranging from about 490 nm to about 500 rnn. Table 3 shows the color coordinate map of the first embodiment. As shown in Table 3, the color coordinates (11>,) of the first embodiment are red (〇.542, 〇.516), and green (〇.〇77). , 〇.576), blue (0.168, 0.163), in accordance with the TCO'03 specification. The color coordinates (X, y) corresponding to the CBE map are red (0.697, 0.295), green (0.213, 0.71Q), blue (0.145, 0.063), and the CIE diagram shows that the color performance is significantly improved. . / First embodiment X y Y uf ν' L* NTSC Proportional color temperature (K) Red 0.697 0.295 4.95 0*542 0516 26:6 绦0*213 0.710 \33S 0.077 0576 442' 108.1% 6718 Blue 0.145 0.063 1.74 0.168 0.163 141 White 0310 0322 6.89 0. Ϊ99 0.464 31.6 Table 3 13 1324270 Fig. 3 is a front view of the c of the first embodiment. It can be seen from Fig. 3 that when the maximum brightness value of the spectrum of the backlight is set to about 1 〇, the spectral brightness of the backlight and the transmittance of the color filter of the blue enamel are in the wavelength range of about 49 〇 to The product sum between approximately 54 and the circle is approximately less than or substantially equal to 2: 〇, and its gamut can satisfy the standard specification of TC0'03. Figure 4 is a diagram showing the backlight spectrum of the second embodiment, the transmittance of the color aperture sheet, and the spectrogram of the liquid crystal display. In the fourth item, when the maximum brightness value of the spectrum of the backlight is set to about 1.0, the spectral brightness of the backlight and the color filter of the blue halogen are in the wavelength range of about 490 nm to about 540 nm. The product of the sum is the area of the product formed by the back-'light source spectral value and the transmittance of the blue halogen color light-emitting sheet between about · nm and about 540 nm and the horizontal axis. As shown in Fig. 4, the blue transmittance is longer than the peak wavelength of the blue transmittance of the blue color filter, and the color filter of the green color is lighter than the green color of the light. The wavelength at which the peak wavelength of the transmittance is also short and the green transmittance is uniform, ranging from about 49 〇 nm to about 5 〇〇 nm. Table 4 shows the color coordinates of the second embodiment. As shown in Table 4, the color coordinates (u', v,) of the second embodiment are red (0·546, 0·516) 'green (〇.076, 〇/76), blue (0.168, 0.160) , in line with TCO, 03 specifications. Corresponding to the CIE map color coordinates (fork) are red (0.700, 0.294), green (〇 · 212, 0.711), blue (0145, 〇〇 61), from the CIE diagram can be known for color performance Significant improvement. 14 --- Second Example - X y Υ υ' ν' L* NTSC Proportional Color Temperature (Κ) Red 0.700 0*294 5.63 0546 0516 285 109.13⁄4 5837 — Winding 0·212 0.711 13.40 0.076 0576 43.4 Blue 0.145 0.061 1.70 0.168 0.160 13*8 White 0325 0*315 6.91 0512 0.462 31.6 Table 4 Figure 5 shows the cm diagram of the second embodiment. It can be seen from Fig. 5 that when the maximum brightness value of the spectrum of the backlight is set to about 1.0, the spectral brightness of the backlight and the transmittance of the blue color filter are in the wavelength range of about 490 nm to about The product sum between 540 nm is roughly less than or substantially equal to 2.0, and its gamut performance satisfies the standard specification of TC0'03. Although the embodiment of the present invention is based on the fact that the maximum luminance value of the spectrum of the backlight is set to about 1.0, this is a simple example to minimize the interference parameter of the luminance problem of the backlight, so as to achieve a relatively simple method. However, when the maximum luminance value of the spectrum of the backlight is not set to about 1.0, the embodiment of the present invention may be used as long as it conforms to the relationship described in the present invention. The above is only the preferred embodiment of the present invention, and all changes and modifications made by the patent application scope of the present invention should be covered by the present invention. [Simple description of the diagram] 15 1324270 Figure 1 shows the color filter of the red, green and blue (RGB) color coordinates when the color filter with the conventional cold cathode lamp is used with the LED light source. situation. Figure 2 is a diagram showing the backlight spectrum of the first embodiment of the present invention, the transmittance of the color filter, and the spectrogram of the liquid crystal display. Figure 3 is a diagram showing the CEE of the first embodiment of the present invention. Figure 4 is a diagram showing the backlight spectrum of the second embodiment of the present invention, the transmittance of the color filter, and the spectrogram of the liquid crystal display. Figure 5 is a CEE diagram showing a second embodiment of the present invention. [Main component symbol description] None. 16

Claims (1)

1324270 X. Patent application scope: ^: Seed liquid indicator: It has multiple strips, green and blue m-color filter 'light sheet and non-cathode fluorescent tube backlight, which is characterized by: ^The non-cathode fluorescent tube The maximum brightness value of the spectrum of the f-light source is set to about 'the spectral brightness of the non-cathode fluorescent tube backlight and the transmittance of the blue color filter, in the wavelength range from about 490 nm to about 54 〇. Postal: The multiplication: and the 'system is roughly less than or roughly equal to Μ. , = as claimed in the scope of patents! The liquid crystal display according to the item, wherein the peak wavelength of the blue transmittance of the color filter of the blue denier, the transmittance of the four colors is long, and the treaty is mailed to about 5 () ( ) nm. The liquid crystal display of claim i, wherein the non-cathode lamp source comprises at least two different color luminescent or white illuminating elements. The liquid crystal display of the above-mentioned item 3, wherein the light-emitting element comprises a seven-light body, an organic light-emitting element, an electroluminescence element, or a combination thereof. The liquid crystal display of claim 3, wherein the non-cathode color is one of those. And the color is different from the different 17 1^24270 6· liquid crystal displays, comprising: a liquid crystal panel having a color filter and having a plurality of red, green, and blue halogens; The non-cathode fluorescent tube backlight is used to provide a light source to the liquid crystal panel, and the spectral brightness of the non-cathode fluorescent tube backlight has a relationship with the transmittance of the blue color filter. Type: 540 Σ 吨 &"„(乂)仏2.〇490, 中,BLU) is the brightness of the non-cathode fluorescent tube backlight, CFBlueU) is the blue color of the color filter 7. The liquid crystal display according to claim 6, wherein the bee-valued wave blue color of the blue scale of the color filter of the color element is higher than the green color The color transmittance of the color of the light-passing film is ♦ The wavelength of the green wavelength is also short - the wavelength is between about 0.0 and about 5 〇〇. 8: If you apply for sizing, item 6 Liquid crystal display it, wherein the non-cathode lamp backlight comprises at least two different color illuminating elements or self-color illuminating 9. The liquid crystal display according to claim 8, wherein the light emitting element comprises a first electrode, an organic light emitting element, an electroluminescent element, or a combination thereof. 8 of the liquid crystal display 11' Cathode lamp month ", has another color of the light-emitting element' and its color is different from the different 18 1324270. One of the colors of the eleventh, the drawing: 1324270 Wake up X small k 1324270 • φ] ss S 娲 夂 ; di; dc: acetylene 1 1 m 罘釆趔 s I 1 1 1 1 1 transfection dyed 铢 dyed 铢輮 town chain 1 1 1 1 驷Wrapped in a pot of W;; | 1 ; .ill. i 1 1 1 1 1 1 ::(1 .1 y ^ C ο Ccc c Wake up (to come) 本 ο ο ζ § § § § ΟΏ 吞 吞 og _ 1324270 S嫉 m0 00 ΙΌ 000 000 s s 9Ό ΖΌ 000 6Ό x small 1324270 哲灭'l''/ dr: 朱铢 镲辘状 40米米 翻锏澪 Ooozoco 卜朱树撕茗 镲 镲 镲 啪 啪 丨 丨 丨跦 丨跦 丨跦 丨跦 丨跦 丨跦 宕 镲 镲 i i i i : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : :竦{}莽0^ 08· I 0OOCO 000.0 0010 Zhai Shuhui 1324270 XA - 00 10 CNJO 000 5 s 90 ΖΌ 80 60