CN1564059A - Pixel Structure of Transflective LCD Panel - Google Patents
Pixel Structure of Transflective LCD Panel Download PDFInfo
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- CN1564059A CN1564059A CN 200410033883 CN200410033883A CN1564059A CN 1564059 A CN1564059 A CN 1564059A CN 200410033883 CN200410033883 CN 200410033883 CN 200410033883 A CN200410033883 A CN 200410033883A CN 1564059 A CN1564059 A CN 1564059A
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Abstract
A pixel structure of a transflective liquid crystal display panel comprises a liquid crystal molecular layer sandwiched between an upper substrate and a lower substrate and a liquid crystal film disposed above the liquid crystal molecular layer. The liquid crystal film has the same phase delay as the liquid crystal molecular layer in the penetration area and the opposite rotation direction of the liquid crystal molecules so as to compensate the phase delay caused by the liquid crystal molecular layer to the penetration light and the reflected light. The polymer liquid crystal film replaces a quarter-wave plate and a half-wave plate in the prior art, so that the production cost can be reduced, the time required by production can be shortened, the productivity can be improved, the defects of the quarter-wave plate and the half-wave plate can be avoided, and the influence on the product percent of pass caused by the process of assembling the quarter-wave plate and the half-wave plate can be avoided; in addition, the transflective LCD of the present invention has less optical film layers, so that the energy consumed by the absorption of each optical film layer in the process of light penetrating through the display panel can be reduced, and the luminous efficiency can be improved.
Description
Technical field
The present invention relates to a kind of dot structure of half-penetration reflecting type liquid crystal display panel, especially a kind of dot structure that replaces quarter-wave plate and 1/2nd ripple plates with the high molecule liquid crystal film.
Background technology
Along with the thin film transistor (TFT) manufacturing technology is progressive fast, LCD has been owing to possessed advantages such as frivolous, power saving, no width of cloth ray, a large amount of is applied to personal digital assistant device, notebook computer, digital camera, takes the photograph in the various electronic products such as video recorder, mobile phone.Yet, because LCD is a non-self luminous display, therefore, traditionally, with a cold cathode fluorescent lamp as backlight, optical films such as the light penetration diffusion barrier that is produced, polaroid, form a uniform in-plane light and inject display panels, use and present image.
Generally speaking, the light that backlight produced only has less than 10% and can pass display panels and be applied in the demonstration, and remaining luminous energy all is absorbed in the process that penetrates optical film and display panels.In order to address the above problem, reflective liquid-crystal display is developed.Reflective liquid-crystal display utilizes ambient light to replace the function of backlight, thereby does not need device cold cathode fluorescent lamp and relevant optical film among display.By this, except saving the energy consumption of display, more can reduce the dimension and weight of display.Yet when context is dark partially, reflective liquid-crystal display can't obtain enough ambient lights, will cause display effect to be had a greatly reduced quality.
In order to overcome the problems referred to above, the half-penetrating reflective LCD is developed.The half-penetrating reflective LCD can be according to demand simultaneously with the function of penetration and reflective liquid-crystal display, and environment for use light or backlight are as illumination.Therefore, when the ambient light abundance, can select environment for use light to think illumination, to save energy.When the ambient light deficiency, can select to use backlight to think illumination, to obtain desirable display effect.
Please refer to Fig. 1, show the dot structure of a typical half-penetrating reflective LCD.Comprise a upper substrate 100, an infrabasal plate 300 and clamping layer of liquid crystal molecule 200 in upper and lower base plate 100 and 300.Upper substrate 100 has a glass baseplate 108 and is main body, the upper surface of this glass baseplate 108 is manufactured with quarter-wave plate 106,1/2nd ripple plates 104 and first light polarizing film 102 in regular turn, and its lower surface is manufactured with a chromatic filter layer 110 and common electrode 112 in regular turn.Infrabasal plate 300 has a glass baseplate 308 and is main body, the lower surface of this glass baseplate 308 is manufactured with quarter-wave plate 306,1/2nd ripple plates 304 and second light polarizing film 302 in regular turn, its upper surface is manufactured with pixel electrode 312 and reflecting plate 314 in regular turn, this reflecting plate 314 has an organic layer 3142 and is main body, and, in the surface coverage of organic layer 3142 reflected coat layer 3144 that is connected to pixel electrode 312 is arranged, the upper surface region of using glass baseplate 308 is divided into a penetrating region T and an echo area R who is coated with reflecting plate.Drive liquid crystal molecule by the potential difference (PD) of 312 of common electrode 112 and pixel electrodes and rotate, to reach the purpose of demonstration.
In the reflection display part, in the process of ambient light reflected back human eye,, and penetrating the display part altogether through secondary layer of liquid crystal molecule 200, the light that backlight produces is only through a layer of liquid crystal molecule 200.Therefore, layer of liquid crystal molecule 200 is different for the compensation rate of the light of above-mentioned ambient light and backlight generation.In order to make layer of liquid crystal molecule 200 all reach desirable optical compensation effect at echo area T and penetrating region R, as shown in Figure 1, can be by the thickness that increases organic layer 3142 in the reflecting plate 314, the thickness of corresponding reduction echo area R top layer of liquid crystal molecule 200 is used and is adjusted 200 pairs of compensation rates through light of layer of liquid crystal molecule.
Generally speaking, light polarizing film 102 and 302 purpose are to make backlight and environment light source to change linearly polarized light into and enter in this dot structure, quarter- wave plate 106 and 306 purpose are to make above-mentioned linearly polarized light to change circularly polarized light into and enter in the layer of liquid crystal molecule 200, light in order to 200 pairs of processes of layer of liquid crystal molecule compensates, and the purpose of 1/ 2nd ripple plates 104 and 304 is extending neighboring quarter- wave plate 106 and 306 frequency ranges that operated, make in the frequency range of visible light, linearly polarized light all can change desirable circularly polarized light into.
As mentioned above, above-mentioned light polarizing film 102 and 302, quarter- wave plate 106 and 306 and 1/ 2nd ripple plates 104 and 304 all are to omit in the design of liquid crystal display.Therefore, except increasing the cost of making above-mentioned each rete, for each rete is attached on glass baseplate 108 and 308, more cause the complexity of technology to increase, and cause the corresponding reduction of qualification rate of product.
In view of this, the present invention proposes a kind of dot structure of half-penetrating reflective LCD, to overcome the defective of above-mentioned known technology.
Summary of the invention
The technical problem to be solved in the present invention is: a kind of dot structure of half-penetrating reflective LCD is provided, and it can omit conventional liquid crystal prerequisite quarter-wave plate of institute and 1/2nd ripple plates.
Technical solution of the present invention is: a kind of dot structure of half-penetration reflecting type liquid crystal display panel comprises a upper substrate, an infrabasal plate, a layer of liquid crystal molecule and a liquid crystal film at least.Wherein, infrabasal plate is made in the below of upper substrate, and, can divide into an echo area and a penetrating region that is coated with the reflection horizon at the upper surface of infrabasal plate.The layer of liquid crystal molecule clamping is between upper and lower base plate, and liquid crystal film is positioned at above-mentioned layer of liquid crystal molecule top, to compensate layer of liquid crystal molecule to the bit phase delay that penetrates and reflected light was caused.
Characteristics of the present invention and advantage are: the dot structure of half-penetration reflecting type liquid crystal display panel of the present invention comprises that the layer of liquid crystal molecule and of a clamping between upper and lower base plate is positioned at the liquid crystal film of layer of liquid crystal molecule top.This liquid crystal film has and the bit phase delay of penetrating region layer of liquid crystal molecule equivalent and opposite liquid crystal molecule sense of rotation, to compensate layer of liquid crystal molecule to penetrating the bit phase delay that light and reflected light are caused.By above-mentioned high molecule liquid crystal film, replace quarter-wave plate and 1/2nd ripple plates in the known technology, not only can reduce production costs, shorten and produce the required time, to improve production capacity, can also avoid the flaw of quarter-wave plate and 1/2nd ripple plates, and avoid assembling the quarter-wave plate and 1/2nd ripple plate processes impact product percent of pass; In addition, half-penetrating reflective LCD of the present invention has more a spot of optical film, thereby can reduce in the process of light penetration display panel, is absorbed the energy that is consumed by each optical film, to improve luminescence efficiency.
Description of drawings
Fig. 1 is the synoptic diagram of a known half-penetrating reflective LCD device pixel structure.
Fig. 2 is dot structure one specific embodiment of half-penetrating reflective LCD of the present invention.
Fig. 3 is not for to feed under the situation of operating voltage, and half-penetration reflecting type liquid crystal display panel of the present invention penetrates the synoptic diagram that shows running.
Fig. 4 is not for to feed under the situation of operating voltage, and half-penetration reflecting type liquid crystal display panel reflection of the present invention shows the synoptic diagram of running.
Fig. 5 is for to be connected with under the situation of operating voltage, and half-penetration reflecting type liquid crystal display panel of the present invention penetrates the synoptic diagram that shows running.
Fig. 6 is for to be connected with under the situation of operating voltage, and half-penetration reflecting type liquid crystal display panel reflection of the present invention shows the synoptic diagram of running.
The drawing reference numeral explanation:
100, infrabasal plate 300, upper substrate 200, layer of liquid crystal molecule
110 color filter films 102, first light polarizing film 106,306, quarter-wave plate
302, second light polarizing film 104,304,1/2nd ripple plates 108,308, glass baseplate
112, common electrode 312, pixel electrode 314, reflecting plate
120, liquid crystal film
Embodiment
Please refer to Fig. 2, show dot structure one specific embodiment of half-penetrating reflective LCD of the present invention.This dot structure comprises a upper substrate 100, an infrabasal plate 300 and the clamping layer of liquid crystal molecule 200 in upper and lower base plate 100 and 300.Upper substrate 100 has a glass baseplate 108 and is main body, and the upper surface of this glass baseplate 108 is manufactured with the liquid crystal film 120 and first light polarizing film 102 in regular turn, and its lower surface is manufactured with a chromatic filter layer 110 and common electrode 112 in regular turn.Infrabasal plate 300 has a glass baseplate 308 and is main body, the lower surface of this glass baseplate 308 is manufactured with second light polarizing film 302, and its upper surface is manufactured with pixel electrode 312 and reflecting plate 314 in regular turn, this reflecting plate 314 has an organic layer 3142 and is main body, and, in the surface coverage of organic layer 3142 reflected coat layer 3144 that is connected to pixel electrode 312 is arranged, the upper surface region of using glass baseplate 308 is divided into a penetrating region T and an echo area R who is coated with reflecting plate.Drive liquid crystal molecule by the potential difference (PD) of 312 of common electrode 112 and pixel electrodes and rotate, to reach the purpose of demonstration.
In the present embodiment, liquid crystal film 120 between the glass baseplate 108 and first light polarizing film 102, yet, if different demands is arranged, liquid crystal film 120 can also be made in the lower surface of this glass baseplate 108, or clamping is between chromatic filter layer 110 and common electrode 112.
Do not feed under the situation of operating voltage, please refer to Fig. 3, in above-mentioned penetrating region T, second light polarizing film 302 that at first penetrates backlight forms linearly polarized light B1, subsequently, this linearly polarized light B1 penetrates liquid crystal layer 200 and liquid crystal film 120 in regular turn, forms linearly polarized light B3 and passes liquid crystal film 120.And above-mentioned linearly polarized light B3 has identical polarization direction with B1, and also therefore, linearly polarized light B3 can't pass first light polarizing film 102.
In order to achieve the above object, the liquid crystal molecule in liquid crystal layer 200 and the liquid crystal film 120 must meet following three important documents:
One, liquid crystal layer 200 has the identical anglec of rotation and reverse sense of rotation with the liquid crystal molecule of liquid crystal film 120.Just shown in Figure 3, among the figure liquid crystal molecule of liquid crystal layer 200 be rotated counterclockwise 45 the degree, and the liquid crystal molecule of liquid crystal film 120 turn clockwise 45 the degree.
Two, liquid crystal layer 200 has the bit phase delay amount that equates with liquid crystal film 120 designs.
Three, in liquid crystal layer 200 and the liquid crystal film 120, the liquid crystal molecule of relative position, its trend must be orthogonal.As shown in Figure 3, liquid crystal layer 200 is in the liquid crystal molecule of contiguous upper substrate 100 lower surfaces, with the liquid crystal molecule of liquid crystal film 120 in contiguous upper substrate 100 upper surfaces, the trend of the two is vertical mutually, by that analogy, liquid crystal layer 200 is in the liquid crystal molecule of contiguous infrabasal plate 300 upper surfaces, and with the liquid crystal molecule of liquid crystal film 120 in contiguous first light polarizing film 102, its trend is also vertical mutually.
By this, liquid crystal layer 200 is cancelled out each other for the bit phase delay effect that linearly polarized light B1 is produced with liquid crystal film 120, and the linearly polarized light B3 that passes liquid crystal film 120 has identical polarization direction with linearly polarized light B1.
In addition, please refer to Fig. 4, do not feeding under the situation of operating voltage, in above-mentioned echo area R, ambient light at first penetrates first light polarizing film 102 and forms linearly polarized light A1, and subsequently, this linearly polarized light A1 penetrates liquid crystal film 120 in regular turn and arrives at reflecting plate 314 with liquid crystal layer 200, and reflection penetrates liquid crystal layer 200 and liquid crystal film 120, forms linearly polarized light A3 and passes liquid crystal film 120.And linearly polarized light A3 is vertical mutually with the polarization direction of linearly polarized light A1, and also therefore, linearly polarized light A3 can't pass first light polarizing film 102.
In order to achieve the above object, the optical modulation structure (Optical Modulation Structure) of liquid crystal layer 200 and liquid crystal film 120 superimposed formations must produce the bit phase delay that is equivalent to the quarter-wave plate.Therefore, when linearly polarized light A1 penetrates this optical modulation structure, through reflecting plate 314 reflections, pass above-mentioned optical modulation structure again, experience is equivalent to the bit phase delay of 1/2nd wavelength altogether, to form and the orthogonal linearly polarized light A3 in linearly polarized light A1 polarization direction.
Have in feeding under the situation of operating voltage, liquid crystal molecule is along with direction of an electric field is arranged, and presents the trend of vertical substrate 100 and 300.Therefore, can suppose that liquid crystal layer 200 does not produce any bit phase delay effect to penetrating light.Otherwise, because liquid crystal film 120 is a material with the macromolecule, generally speaking be not subjected to electric field influence, therefore, can keep original bit phase delay effect.
Please refer to Fig. 5, have in feeding under the situation of operating voltage, in above-mentioned penetrating region T, second light polarizing film 302 that at first penetrates backlight forms linearly polarized light B5, and subsequently, this linearly polarized light B5 penetrates liquid crystal layer 200 in regular turn and enters first light polarizing film 102 with liquid crystal film 120.Because the influence of operating voltage, liquid crystal layer 200 can not produce the effect of any bit phase delay to linearly polarized light B5, therefore, with regard to a specific embodiment, can be by suitably adjusting and selecting liquid crystal film 120, make the polarized light B7 that passes liquid crystal film 120 can effectively pass first light polarizing film 102, that is this polarized light B7 has a main polarization direction p1, and the penetrating shaft direction of first light polarizing film 102 is identical therewith.
In addition, please refer to Fig. 6, have in feeding under the situation of operating voltage, in above-mentioned echo area R, ambient light at first penetrates first light polarizing film 102 and forms linearly polarized light A5, and subsequently, this linearly polarized light A5 penetrates liquid crystal film 120 in regular turn and arrives at reflecting plate 314 with liquid crystal layer 200, and reflection penetrates liquid crystal layer 200 and liquid crystal film 120, and enters first light polarizing film 102.Because the influence of operating voltage, liquid crystal layer 200 can not produce the effect of any bit phase delay to linearly polarized light A5.Therefore, with regard to a specific embodiment, can be by suitably adjusting and selecting liquid crystal film 120, make the polarized light A7 that passes liquid crystal film 120 through reflecting plate 314 reflections, can effectively pass first light polarizing film 102, that is this polarized light A7 has a main polarization direction p2, and the penetrating shaft direction of first light polarizing film 102 is identical therewith.
Please refer to Fig. 2, the thickness of penetrating region T liquid crystal layer 200 is equivalent to the thickness of echo area R liquid crystal layer 200, with the totalling of reflecting plate 314 thickness.Therefore, the liquid crystal molecule of penetrating region T and echo area R produces different bit phase delay effects.In other words, by suitably adjusting parameter, for example: reflecting plate 314 thickness, liquid crystal molecule pre-dumping angle and the liquid crystal molecule anglec of rotation etc., can make among the penetrating region T, liquid crystal layer 200 does not produce any bit phase delay effect with the optical modulation structure that liquid crystal film 120 is constituted, and among the R of echo area, but generation is equivalent to quarter-wave bit phase delay.
It should be noted that, because the liquid crystal molecule of the liquid crystal layer that uses or the difference of liquid crystal film material, the important document that must meet in foregoing liquid crystal layer 200 and the liquid crystal film 120, as: liquid crystal molecule must have the identical anglec of rotation with reverse sense of rotation, liquid crystal molecule trend with the bit phase delay amount that equates and relative position must be orthogonal, may not obtain optimal results.Therefore, with regard to a specific embodiment, can select liquid crystal film 120, the difference that makes the bit phase delay amount that possessed and liquid crystal layer 200 bit phase delay amounts is between positive and negative 30nm, and rotation (twist) angle of liquid crystal molecule in the liquid crystal film 120, and the deviate of the anglec of rotation of the liquid crystal molecule in the liquid crystal layer 200 is between positive and negative 10 degree, simultaneously, corresponding liquid crystal molecule in the liquid crystal molecule of liquid crystal film 120 and the layer of liquid crystal molecule 200, the angle of the two between 80 degree between 100 degree.
Compared to traditional half-penetrating reflective LCD, the present invention has following advantage:
One, quarter-wave plate 106,306 and 1/2nd ripple plates 104,304 that utilize liquid crystal film 120 to replace in traditional half-penetration reflecting type liquid crystal display panel can reduce production costs, and shorten and produce the required time, to improve production capacity.
Two, as mentioned above, can avoid the flaw of quarter-wave plate 106,306 and 1/2nd ripple plates 104,304, and the disappearance of avoiding assembling quarter- wave plate 106 and 306 and 1/ 2nd ripple plates 104 and 304 processes, product percent of pass is impacted.
Three, half-penetrating reflective LCD of the present invention has more a spot of optical film, thereby can reduce in the process of light penetration display panel, is absorbed the energy that is consumed by each optical film, to improve luminescence efficiency.
Though the present invention discloses with specific embodiment; but it is not in order to limit the present invention; any those skilled in the art; the displacement of the equivalent assemblies of under the prerequisite that does not break away from design of the present invention and scope, having done; or, all should still belong to the category that this patent is contained according to equivalent variations and modification that scope of patent protection of the present invention is done.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100338832A CN100504529C (en) | 2004-04-15 | 2004-04-15 | Pixel structure of semi-penetration reflection type liquid crystal display panel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100338832A CN100504529C (en) | 2004-04-15 | 2004-04-15 | Pixel structure of semi-penetration reflection type liquid crystal display panel |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101102435A Division CN101290424B (en) | 2004-04-15 | 2004-04-15 | Pixel Structure of Transflective LCD Panel |
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| CN1564059A true CN1564059A (en) | 2005-01-12 |
| CN100504529C CN100504529C (en) | 2009-06-24 |
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| CNB2004100338832A Expired - Fee Related CN100504529C (en) | 2004-04-15 | 2004-04-15 | Pixel structure of semi-penetration reflection type liquid crystal display panel |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100437250C (en) * | 2005-05-20 | 2008-11-26 | 群康科技(深圳)有限公司 | Semi-transmissive and semi-reflective liquid crystal display device |
| CN100507681C (en) * | 2007-05-15 | 2009-07-01 | 友达光电股份有限公司 | LCD panel |
| US10768474B2 (en) | 2017-09-21 | 2020-09-08 | Au Optronics Corporation | Display panel |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4633906B2 (en) * | 2000-05-23 | 2011-02-16 | Ｊｘ日鉱日石エネルギー株式会社 | Circularly polarizing plate and liquid crystal display device |
| KR20030095403A (en) * | 2001-05-10 | 2003-12-18 | 니폰 가야꾸 가부시끼가이샤 | Liquid crystalline compound and phase difference film using the same |
| JP2003149644A (en) * | 2001-11-08 | 2003-05-21 | Matsushita Electric Ind Co Ltd | Liquid crystal display |
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2004
- 2004-04-15 CN CNB2004100338832A patent/CN100504529C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100437250C (en) * | 2005-05-20 | 2008-11-26 | 群康科技(深圳)有限公司 | Semi-transmissive and semi-reflective liquid crystal display device |
| CN100507681C (en) * | 2007-05-15 | 2009-07-01 | 友达光电股份有限公司 | LCD panel |
| US10768474B2 (en) | 2017-09-21 | 2020-09-08 | Au Optronics Corporation | Display panel |
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| Publication number | Publication date |
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| CN100504529C (en) | 2009-06-24 |
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Granted publication date: 20090624 |