CN101038397B - LCD display module - Google Patents
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- CN101038397B CN101038397B CN2006100718351A CN200610071835A CN101038397B CN 101038397 B CN101038397 B CN 101038397B CN 2006100718351 A CN2006100718351 A CN 2006100718351A CN 200610071835 A CN200610071835 A CN 200610071835A CN 101038397 B CN101038397 B CN 101038397B
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Abstract
A liquid crystal display module, consists of one backlight module and one liquid crystal display panel. The backlight module is suitable for emitting at least one of the first color light, one of the second color light and one of the third color light, in which the wavelength of the first color light is 450nm to 460nm, and that of the second color light is 520nm to 540nm, the third color light is 610nm to 630nm. The liquid crystal display panel consists of one color filter substrate, one active component array substrate and one liquid crystal layer, in which, the color filter substrate has at least one of the first filtering layer, one of the second filtering layer and one of the third filtering layer, suitable for the transmission of three colors of lights mentioned above. In which, the peak value of transmitted light for second filtering layer is 520nm to 540nm, and the half-power frequency width of transmitted light for second filtering layer is 90nm to 120nm, ensure the NTSC ratio of liquid crystal display module between 72% and 90%.
Description
Technical field
The present invention relates to a kind of LCD MODULE, particularly relate to the LCD MODULE of a kind of effective lifting display panels brightness.
Background technology
LCD is owing to have conventional cathode ray tube (Cathode Ray Tube such as low voltage operating, radiationless line scattering, in light weight and volume be little, CRT) display of the manufacturing advantage that is beyond one's reach, with other panel display, as plasma (Plasma) display and electroluminescence (Electroluminance, EL) display, become the major subjects of display research in recent years, more be regarded as the main flow of 21st century display.
The available liquid crystal display comprises a backlight module (Backlight Module) and a display panels (Liquid Crystal Display Panel).Wherein, backlight module has a light supply apparatus, and it comprises the light emitting diode (Light Emitting Diode) that can send redness, green and blue light respectively.In addition, display panels comes show image with above-mentioned three coloured light as display light source, display panels comprises a colored optical filtering substrates (Color Filter), an active elements array substrates (Active Device ArraySubstrate) and a liquid crystal layer (Liquid Crystal Layer), and liquid crystal layer is disposed between colored optical filtering substrates and the active elements array substrates.
The displaying principle of available liquid crystal display is as follows.When the light supply apparatus of backlight module was luminous, light was at first through an active elements array substrates.Active elements array substrates receives extraneous signal and controls the voltage of each pixel electrode on it (Pixel Electrode), make the liquid crystal molecule of liquid crystal layer present different arrangement modes, then can determine light to pass through the intensity size of liquid crystal layer according to the arrangement mode of liquid crystal molecule.If the light by certain pixel electrode can penetrate liquid crystal layer smoothly under pixel electrode voltage control, this light at last via the filter action of colored optical filtering substrates display color on display panels.
Please refer to Fig. 1, it illustrates the synoptic diagram of existing a kind of LCD lumination of light emitting diode spectrum and colored optical filtering substrates transmitted spectrum.The transmission spectrum curve of the red filter layer of low-purity in the existing a kind of colored optical filtering substrates of " LCFR " expression among Fig. 1, the transmission spectrum curve of the green filter layer of " LCFG " expression low-purity, the transmission spectrum curve of the blue color filter layer of " LCFB " expression low-purity.In addition, the curve of spectrum of " LEDR " expression red light emitting diodes, the curve of spectrum of " LEDG " expression green LED, the " LEDB " curve of spectrum of expression blue LED.Generally speaking, under the effect of low-purity colored optical filtering substrates, the intensity or the penetrance of light penetration colored optical filtering substrates are higher, yet as shown in Figure 1, versicolor filter layer is except allowing its corresponding light that light emitting diode sent passes through, because its transmitted spectrum more may overlap with the luminescent spectrum of the light emitting diode of other color, (the transmission spectrum curve LCFG with the green filter layer of low-purity is an example to cause the also filter layer outgoing thus of the light that light emitting diode sent of other color, its frequency range and LEDB and LEDR are overlapping to some extent), make that the light that light emitting diode sent is not good by the filter effect behind the colored optical filtering substrates.
Please refer to Fig. 1, the transmission spectrum curve of highly purified red filter layer in the existing another kind of colored optical filtering substrates of " HCFR " expression among Fig. 1, the transmission spectrum curve of the highly purified green filter layer of " HCFG " expression, the transmission spectrum curve of the highly purified blue color filter layer of " HCFB " expression.In order to improve above-mentioned not good filter effect, the purity of this existing colored optical filtering substrates three primary colors filter layer increases, make the frequency range of high-purity colored optical filtering substrates transmitted spectrum and the frequency range of lumination of light emitting diode spectrum no longer as above-mentioned overlap, therefore promote the filter effect of colored optical filtering substrates.In addition, please refer to Fig. 2, it illustrates the XYZ chromaticity diagram (CIE ChromaticityDiagram) of existing a kind of LCD colored optical filtering substrates.By among Fig. 2 as can be known, promote the purity (purity of code name HCF is greater than the purity of code name LCF among Fig. 2) of colored optical filtering substrates three primary colors filter layer, will make NTSC (the NationalTelevision System Committee) ratio (or for showing colour gamut) of LCD strengthen.
Via as can be known above-mentioned, in present technology, the filter layer of colored optical filtering substrates is many towards the high-purity development, with the colour purity of raising LCD, and then obtains the preferred quality of image.,, will produce relatively that manufacturing cost increases, the light transmittance of colored optical filtering substrates reduces, and cause shortcomings such as the display brightness of LCD is low along with the purity of the filter layer of colored optical filtering substrates improves.What deserves to be mentioned is that the shown NTSC ratio of CRT monitor normally maintained about in the of 75% in the past, yet such display effect but is enough to satisfy general user's demand.In other words, constantly towards the design direction of high colour purity and high display quality, though significantly increased cost of manufacture, its relative benefit that can improve is quite limited at present.
Summary of the invention
In view of this, purpose of the present invention is providing a kind of LCD MODULE exactly, and it adjusts the purity of the filter layer of colored optical filtering substrates under the prerequisite of the display quality of keeping specific degrees, in the hope of the penetrance of increase filter layer, thereby the overall brightness of lifting display panels.
Based on above-mentioned purpose or other purpose, the present invention proposes a kind of LCD MODULE, comprises a backlight module and a display panels.Wherein, backlight module has a light supply apparatus, in order to send at least one first coloured light, one second coloured light and one the 3rd coloured light, wherein the wavelength coverage of first coloured light is between between the 450nm to 460nm, the wavelength coverage of second coloured light is between between the 520nm to 540nm, and the wavelength coverage of the 3rd coloured light is between between the 610nm to 630nm.In addition, display panels comes show image with first coloured light, second coloured light and the 3rd coloured light as display light source, and wherein display panels comprises a colored optical filtering substrates, an active elements array substrates and a liquid crystal layer.Colored optical filtering substrates has at least one first filter layer, one second filter layer and one the 3rd filter layer, and wherein first filter layer is suitable for making first coloured light to pass through, and second filter layer is suitable for making second coloured light to pass through, and the 3rd filter layer is suitable for making the 3rd coloured light to pass through.Active elements array substrates is relative with colored optical filtering substrates, and liquid crystal layer is disposed between colored optical filtering substrates and the active elements array substrates.In the present invention, the peak value of the transmitted spectrum of second filter layer is between between the 520nm to 540nm, and the half-power frequency range (FWHM) of the transmitted spectrum of second filter layer is between between the 90nm to 120nm, makes NTSC ratio that LCD MODULE shows between 72% to 90%.
Described according to the preferred embodiments of the present invention, above-mentioned light supply apparatus for example comprises at least one first light emitting diode, at least one second light emitting diode and at least one the 3rd light emitting diode, in order to send first coloured light, second coloured light and the 3rd coloured light respectively.
Described according to the preferred embodiments of the present invention, above-mentioned active elements array substrates for example is a thin-film transistor array base-plate (Thin Film Transistor Array Substrate).Thin-film transistor array base-plate for example comprises a transparency carrier, multi-strip scanning line (Scan Line) and data line (Data Line), a plurality of thin film transistor (TFT) (Thin Film Transistor) and a plurality of pixel electrodes.Wherein, sweep trace and data wiring are disposed on the transparency carrier, to distinguish a plurality of pixel regions.In addition, thin film transistor (TFT) is disposed at respectively in the pixel region, to drive by its corresponding scanning beam and data wiring.In addition, pixel electrode is disposed in the pixel region respectively, and is coupled to its pairing thin film transistor (TFT).
Described according to the preferred embodiments of the present invention, the peak value of the transmitted spectrum of the first above-mentioned filter layer is for example between between the 440nm to 460nm.
Described according to the preferred embodiments of the present invention, the half-power frequency range (FWHM) of the transmitted spectrum of the first above-mentioned filter layer is for example between between the 60nm to 110nm.
Described according to the preferred embodiments of the present invention, the peak value of the transmitted spectrum of the 3rd above-mentioned filter layer is for example between between the 610nm to 630nm.
Described according to the preferred embodiments of the present invention, the half-power frequency range (FWHM) of the transmitted spectrum of the 3rd above-mentioned filter layer is for example between between the 100nm to 180nm.
Described according to the preferred embodiments of the present invention, the thickness of the first above-mentioned filter layer is for example between 1.0 μ m to 1.8 μ m.
Described according to the preferred embodiments of the present invention, the thickness of the second above-mentioned filter layer is for example between 1.0 μ m to 2.0 μ m.
Described according to the preferred embodiments of the present invention, the thickness of the 3rd above-mentioned filter layer is for example between 1.0 μ m to 2.0 μ m.
Based on above-mentioned, the present invention is under the NTSC ratio that LCD MODULE is shown maintains prerequisite between 72% to 90%, wavelength coverage according to three coloured light that backlight module sent, adjust the purity of the filter layer on the colored optical filtering substrates, with the penetrance of increase filter layer, and then the overall brightness of lifting display panels.
For above and other objects of the present invention, feature and advantage can be become apparent, following conjunction with figs. and preferred embodiment are to illustrate in greater detail the present invention.
Description of drawings
Fig. 1 illustrates the synoptic diagram of existing a kind of LCD lumination of light emitting diode spectrum and colored optical filtering substrates transmitted spectrum.
Fig. 2 illustrates the XYZ chromaticity diagram of existing a kind of LCD colored optical filtering substrates.
Fig. 3 illustrates the three-dimensional cross-sectional schematic of a kind of LCD MODULE of the preferred embodiments of the present invention.
Fig. 4 illustrates the lumination of light emitting diode spectrum of Fig. 3 and the synoptic diagram of colored optical filtering substrates transmitted spectrum.
Fig. 5 illustrates the XYZ chromaticity diagram of the colored optical filtering substrates of Fig. 3.
The simple symbol explanation
LCF: the demonstration colour gamut of existing a kind of low-purity colored optical filtering substrates
LCFR: the transmission spectrum curve of the red filter layer of low-purity in existing a kind of colored optical filtering substrates
LCFG: the transmission spectrum curve of the green filter layer of low-purity in existing a kind of colored optical filtering substrates
LCFB: the transmission spectrum curve of the blue color filter layer of low-purity in existing a kind of colored optical filtering substrates
HCF: the demonstration colour gamut of existing another kind of high-purity colored optical filtering substrates
HCFR: the transmission spectrum curve of highly purified red filter layer in the existing another kind of colored optical filtering substrates
HCFG: the transmission spectrum curve of highly purified green filter layer in the existing another kind of colored optical filtering substrates
HCFB: the transmission spectrum curve of highly purified blue color filter layer in the existing another kind of colored optical filtering substrates
LEDR: the curve of spectrum of existing red light emitting diodes
LEDG: the curve of spectrum of existing green LED
LEDB: the curve of spectrum of existing blue LED
100: LCD MODULE
110: backlight module
112: light supply apparatus
112a: first light emitting diode
112b: second light emitting diode
112c: the 3rd light emitting diode
120: display panels
122: colored optical filtering substrates
122a: first filter layer
122b: second filter layer
122c: the 3rd filter layer
124: active elements array substrates
124a: transparency carrier
124b: sweep trace
124c: data line
124d: thin film transistor (TFT)
124e: pixel electrode
124f: pixel region
126: liquid crystal layer
LCF ': the demonstration colour gamut of a kind of low-purity colored optical filtering substrates of the present invention
LCFR ': the transmission spectrum curve of the 3rd filter layer of the present invention
LCFG ': the transmission spectrum curve of second filter layer of the present invention
LCFB ': the transmission spectrum curve of first filter layer of the present invention
LEDR ': the curve of spectrum of the 3rd coloured light that light supply apparatus of the present invention sent
LEDG ': the curve of spectrum of second coloured light that light supply apparatus of the present invention sent
LEDB ': the curve of spectrum of first coloured light that light supply apparatus of the present invention sent
P1: the transmission spectrum curve peak value of first filter layer of the present invention
P2: the transmission spectrum curve peak value of second filter layer of the present invention
P3: the transmission spectrum curve peak value of the 3rd filter layer of the present invention
W1: the half-power frequency range of the transmission spectrum curve of first filter layer of the present invention
W2: the half-power frequency range of the transmission spectrum curve of second filter layer of the present invention
W3: the half-power frequency range of the transmission spectrum curve of the 3rd filter layer of the present invention
Embodiment
Please refer to Fig. 3, it illustrates the three-dimensional cross-sectional schematic of a kind of LCD MODULE of the preferred embodiments of the present invention.The LCD MODULE 100 of present embodiment comprises a backlight module 110 and a display panels 120.Wherein, backlight module 110 has a light supply apparatus 112, in order to send at least one first coloured light, one second coloured light and one the 3rd coloured light, wherein the wavelength coverage of first coloured light is between (for example being blue light) between the 450nm to 460nm, the wavelength coverage of second coloured light is between (for example being green glow) between the 520nm to 540nm, and the wavelength coverage of the 3rd coloured light is between (for example being ruddiness) between the 610nm to 630nm.
Refer again to Fig. 3, active elements array substrates 124 for example is a thin-film transistor array base-plate.Thin-film transistor array base-plate for example comprises a transparency carrier 124a, multi-strip scanning line 124b and data line 124c, a plurality of thin film transistor (TFT) 124d and a plurality of pixel electrode 124e.Wherein, sweep trace 124b and data wiring 124c are disposed on the transparency carrier 124a, to distinguish a plurality of pixel region 124f.In addition, thin film transistor (TFT) 124d is disposed at respectively in these pixel regions 124f, to drive by these sweep traces 124b and these data wirings 124c.In addition, pixel electrode 124e is disposed at respectively in these pixel regions 124f, and is coupled to its pairing thin film transistor (TFT) 124d, and the material of pixel electrode 124e for example is indium tin oxide transparent conductive materials such as (ITO).
The displaying principle of the LCD MODULE 100 of present embodiment is as follows.Above-mentioned three coloured light that the light supply apparatus 112 of backlight module 110 is sent make its direct of travel towards display panels 120 via the structural design of backlight module 110.Thin film transistor (TFT) 124b on the active elements array substrates 124 is via the driving that scans distribution 124b and data wiring 124c, and control the voltage of each pixel electrode 124e on it, make the liquid crystal molecule (Fig. 3 does not illustrate) of liquid crystal layer 126 present different arrangement modes, then can determine light to pass through the intensity size of liquid crystal layer 126 according to the arrangement mode of liquid crystal molecule.If the light by certain pixel electrode 124e can penetrate liquid crystal layer 126 smoothly under pixel electrode 124e Control of Voltage, this light at last via the filter action of colored optical filtering substrates 122 display color on display panels 120.
Fig. 4 illustrates the lumination of light emitting diode spectrum of Fig. 3 and the synoptic diagram of colored optical filtering substrates transmitted spectrum, and Fig. 5 illustrates the XYZ chromaticity diagram of the colored optical filtering substrates of Fig. 3.For solving the problem of aforementioned available liquid crystal display, the wavelength coverage of three coloured light that present embodiment is sent according to backlight module 110 reduces the purity of the filter layer on the colored optical filtering substrates 122, to increase the penetrance of filter layer.Please also refer to Fig. 3～5, " LEDB ' " among Fig. 4, " LEDG ' " and " LEDR ' " represent the curve of spectrum of first coloured light, second coloured light and the 3rd coloured light that the aforesaid light supply apparatus 112 of present embodiment sent respectively.In order to make NTSC ratio (overlapping area of LCF ' institute's covering scope and NTSC institute covering scope is divided by the area of NTSC institute covering scope among Fig. 5) that LCD MODULE 100 shows between 72% to 90%, the selection of material that for example can be by the second filter layer 122b or the control of thickness (between 1.0 μ m to 2.0 μ m), make the peak value P2 of transmitted spectrum LCFG ' of the second filter layer 122b between between the 520nm to 540nm, and half-power frequency range (FWHM) W2 of the transmitted spectrum LCFG ' of the second filter layer 122b is between between the 90nm to 120nm.
It should be noted that, except the setting of the peak value P2 of the transmitted spectrum LCFG ' of the above-mentioned second filter layer 122b and half-power frequency range W2, in like manner also can the arrange in pairs or groups selection of material of the first filter layer 122a or the control of thickness (between 1.0 μ m to 1.8 μ m), the peak value P1 of transmitted spectrum LCFB ' that makes the filter layer 122a that wins is between between the 440nm to 460nm, and half-power frequency range (FWHM) W1 of transmitted spectrum LCFB ' that makes the first filter layer 122a is between between the 60nm to 110nm.In addition, also can the arrange in pairs or groups selection of material of the 3rd filter layer 122c or the control of thickness (between 1.0 μ m to 2.0 μ m), make the peak value P3 of transmitted spectrum LCFR ' of the 3rd filter layer 122c between between the 610nm to 630nm, and half-power frequency range (FWHM) W3 of transmitted spectrum LCFR ' that makes the 3rd filter layer 122c is between between the 100nm to 180nm.Therefore, by above-mentioned method for designing, can effectively adjust the optical filtering purity of colored optical filtering substrates, to reach the NTSC ratio of LCD MODULE 100 designed demonstrations for different color light.
In sum, the present invention maintains (the NTSC ratio is between 72% to 90%) in the particular range with the display color purity of LCD, and is not to develop unconfined the demonstration towards the high-purity color.Wherein, according to the wavelength coverage of three coloured light that backlight module sent, the selection of the material by filter layer or the control of thickness are adjusted the peak value and the half-power frequency range of the transmitted spectrum of filter layer, to increase the penetrance of filter layer.Therefore, can effectively reduce the cost of manufacture of colored optical filtering substrates, help the volume production of product, and can reduce the thickness of filter layer, to improve whole display brightness.
Though the present invention discloses as above with preferred embodiment; yet it is not in order to limit the present invention; those skilled in the art can do a little change and retouching without departing from the spirit and scope of the present invention, thus protection scope of the present invention should with accompanying Claim the person of being defined be as the criterion.
Claims (11)
1. LCD MODULE comprises:
Backlight module, has light supply apparatus, in order to send at least one first coloured light, second coloured light and the 3rd coloured light, wherein the wavelength coverage of this first coloured light is between between the 450nm to 460nm, the wavelength coverage of this second coloured light is between between the 520nm to 540nm, and the wavelength coverage of the 3rd coloured light is between between the 610nm to 630nm;
Display panels comes show image with this first coloured light, this second coloured light and the 3rd coloured light as display light source, and this display panels comprises:
Colored optical filtering substrates, have at least one first filter layer, second filter layer and the 3rd filter layer, wherein this first filter layer is suitable for making this first coloured light to pass through, and this second filter layer is suitable for making this second coloured light to pass through, and the 3rd filter layer is suitable for making the 3rd coloured light to pass through;
Active elements array substrates is relative with this colored optical filtering substrates; And
Liquid crystal layer is disposed between this colored optical filtering substrates and this active elements array substrates, and the peak value of the transmitted spectrum of this second filter layer is between between the 520nm to 540nm, and the half-power frequency range of the transmitted spectrum of this second filter layer is between between the 90nm to 120nm,
Wherein the half-power frequency range of the transmitted spectrum of this first filter layer extends to second wavelength bigger than this first wavelength from first wavelength, and wherein the transmitted spectrum of this first filter layer is not overlapping with the wavelength coverage of this second coloured light at this second wavelength place.
2. LCD MODULE as claimed in claim 1, wherein this light supply apparatus comprises at least one first light emitting diode, at least one second light emitting diode and at least one the 3rd light emitting diode, in order to send this first coloured light, this second coloured light and the 3rd coloured light respectively.
3. LCD MODULE as claimed in claim 1, wherein this active elements array substrates is a thin-film transistor array base-plate.
4. LCD MODULE as claimed in claim 3, wherein this thin-film transistor array base-plate comprises:
Transparency carrier;
Multi-strip scanning line and data wiring are disposed on this transparency carrier, to distinguish a plurality of pixel regions;
A plurality of thin film transistor (TFT)s are disposed at respectively in those pixel regions, to drive by those sweep traces and those data wirings; And
A plurality of pixel electrodes are disposed at respectively in those pixel regions, and are coupled to its pairing those thin film transistor (TFT)s.
5. LCD MODULE as claimed in claim 1, wherein the peak value of the transmitted spectrum of this first filter layer is between between the 440nm to 460nm.
6. LCD MODULE as claimed in claim 1, wherein the half-power frequency range of the transmitted spectrum of this first filter layer is between between the 60nm to 110nm.
7. LCD MODULE as claimed in claim 1, wherein the peak value of the transmitted spectrum of the 3rd filter layer is between between the 610nm to 630nm.
8. LCD MODULE as claimed in claim 1, wherein the half-power frequency range of the transmitted spectrum of the 3rd filter layer is between between the 100nm to 180nm.
9. LCD MODULE as claimed in claim 1, wherein the thickness of this first filter layer is between 1.0 μ m to 1.8 μ m.
10. LCD MODULE as claimed in claim 1, wherein the thickness of this second filter layer is between 1.0 μ m to 2.0 μ m.
11. LCD MODULE as claimed in claim 1, wherein the thickness of the 3rd filter layer is between 1.0 μ m to 2.0 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100718351A CN101038397B (en) | 2006-03-16 | 2006-03-16 | LCD display module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100718351A CN101038397B (en) | 2006-03-16 | 2006-03-16 | LCD display module |
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| CN101038397A CN101038397A (en) | 2007-09-19 |
| CN101038397B true CN101038397B (en) | 2010-04-14 |
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| CN2006100718351A Active CN101038397B (en) | 2006-03-16 | 2006-03-16 | LCD display module |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW201022801A (en) | 2008-12-09 | 2010-06-16 | Au Optronics Corp | Liquid crystal display |
| CN103791318B (en) * | 2012-11-05 | 2017-04-19 | 群康科技(深圳)有限公司 | Backlight module |
| CN114284321A (en) * | 2021-12-16 | 2022-04-05 | 武汉华星光电半导体显示技术有限公司 | Optical adjusting method of color film layer and display panel |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1206567C (en) * | 2000-05-04 | 2005-06-15 | 皇家菲利浦电子有限公司 | Assembly of display device and illumination system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1206567C (en) * | 2000-05-04 | 2005-06-15 | 皇家菲利浦电子有限公司 | Assembly of display device and illumination system |
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