CN1165359A - Colour display device - Google Patents
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- CN1165359A CN1165359A CN 96117312 CN96117312A CN1165359A CN 1165359 A CN1165359 A CN 1165359A CN 96117312 CN96117312 CN 96117312 CN 96117312 A CN96117312 A CN 96117312A CN 1165359 A CN1165359 A CN 1165359A
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Abstract
A colour display is composed of multi-colour displaying tube and bichromatic liquid crystal light valve. Said multi-colour displaying tube is of current sensitive type, voltage senstive type, double-beam shadow mask type, or grid mesh type. Said bichromatic liquid crystal light valve having filter function consists of liquid crystal box and two polarizing plates. Colour displaying can be realized by changing accelerating current or voltage of electronic beam and the state of light valve, and using different electronic beams to excite correspondent fluorescent powders. Its advantages are high resolution, contract and brightness, good colour purity, low power and cost, and resisting vibration and impact.
Description
The invention relates to the improvement of field sequence type color monitor.
Early fifties, shadow mask CPT succeeds in developing, and four during the last ten years, and CPT output increases rapidly, on quality and performance, all makes remarkable progress.Because the premium properties of CPT, they have obtained widespread use in the demonstration field.Use CPT and CDT in a large number in fields such as color TV and terminal demonstrations at present.Along with science and technology and the development of producing and the raising of people's demand, the performance to CPT and CDT has proposed requirements at the higher level to resolution especially.Because the restriction of this body structure of shadow mask crt, it is very difficult further improving resolution.Therefore press for the new color monitor of exploitation.
A kind of new type colorful display that does not have shadow mask has appearred recently, i.e. field sequence type color monitor, and it is made up of monochromatic display tube and liquid crystal light valve (LCLV), and liquid crystal light valve is called liquid crystal color shutter (LCCS) sometimes.Monochromatic display tube can send the spectrum of different base colors simultaneously, and liquid crystal light valve has the optical filter effect, and it can only allow certain color of light pass through under different conditions of work, thereby reaches the colored purpose that shows.The field sequence type color monitor is divided into double-colored field sequence type color monitor (double-colored LCLV/CRT system) and full color field sequential color monitor (panchromatic LCLV/CRT system).Their characteristics are that resolution and contrast height, low in energy consumption, colour stable and vibration resistance and resistance to impact are good.Double-colored LCLV/CRT system is practicability, and panchromatic LCLV/CRT system also succeeds in developing.But double-colored LCLV/CRT system Show Color is few, and for example red and green double-colored LCLV/CRT system can only show red, orange, yellow and green four kinds of colors.Though it is panchromatic that panchromatic LCLV/CRT system can show, brightness is low, and the blue primary undersaturation also has distance from practicality.
In order to solve the problem of above-mentioned existence, the present invention adopts electric current responsive type multicolour display tube or voltage-sensitive type multicolour display tube or two-beam shadow mask or grid type multicolour display tube to replace monochromatic display tube, and color monitor is formed in they and double-colored liquid crystal light valve.So not only can realize panchromatic video picture and panchromatic demonstration, and brightness is obviously improved, also can improve the purity of blue light.
Be elaborated below.
Electric current responsive type multicolour display tube is to obtain different glow colors by the acceleration electric current that changes electron beam.In this class pipe, generally use two kinds of powder, for example red, green powder, the brightness of its medium green powder and current density are the sublinear relation, and rouge and powder brightness and current density are the ultralinear relation, and when changing the acceleration electric current, glow color can change to orange from green.When the brightness of hot, green two kinds of powder-current characteristics exchanged, glow color can change to the amber green from redness.The change color of this class display tube is not remarkable, and promptly color separated is still poor, and only a kind of primary colours can finely show.
If change the monochromatic display tube in the field sequence type color monitor into electric current responsive type multicolour display tube, acceleration electric current that so just can be by changing electron beam and the duty by double-colored liquid crystal light valve change glow color, thereby reach panchromatic demonstration purpose.In this color display with new field order, electric current responsive type multicolor displaying tube fluorescent screen is not to adopt red, green two kinds of fluorescent powder, but adopt three kinds of fluorescent powder, red, green, blue powder for example, two kinds of powder wherein, for example brightness-the current characteristics of rouge and powder and green powder is a sublinear, and another kind of powder, for example brightness one current characteristics of blue powder is a ultralinear, perhaps wherein a kind of powder, for example brightness-the current characteristics of blue powder is a sublinear, and all the other two kinds of fluorescent powder, for example brightness-the current characteristics of rouge and powder and green powder is a ultralinear.In the previous case, when current density hour, multicolour display tube sends red, green mixed light, by changing the duty of liquid crystal light valve, liquid crystal light valve can only make ruddiness or green glow pass through.When current density was big, multicolour display tube mainly sent blue light, so just can realize panchromatic demonstration.
Voltage-sensitive type multicolour display tube is by changing the speed that accelerating potential promptly changes electronics, making penetration of electrons in different fluorescent powder, to obtain different glow colors.Early stage once research uses the video screen with voltage-sensitive characteristic to realize color TV, and low because of brightness, color is not bright-coloured, does not succeed.But voltage-sensitive type multicolour display tube is simple in structure, without shadow mask or aperture plate, so the resolution height, and only just can change glow color by changing accelerating potential, so obtained increasingly extensive application.The multicolour display tube that for example adopts red, green two kinds of powder to make can obtain red, orange, yellow, green four kinds of chromatic colours by changing accelerating potential.
If change the monochromatic display tube in the field sequence type color monitor into voltage-sensitive type multicolour display tube, so just can change glow color, reach panchromatic demonstration purpose by the corresponding fluorescent powder of different-energy electron-beam excitation with by the duty that changes double-colored liquid crystal light valve.In this color display with new field order, voltage-sensitive type multicolor displaying tube fluorescent screen is not to adopt red, green two kinds of fluorescent powder, but adopts three kinds of fluorescent powder, for example red, green, blue powder, wherein a kind of fluorescent powder, for example blue powder can be under low pressure luminous, and all the other two kinds of fluorescent powder, for example rouge and powder and green powder are only under high pressure luminous, perhaps two kinds of fluorescent powder wherein, for example rouge and powder and green powder can be under low pressure luminous, and another kind of fluorescent powder, for example blue powder is only under high pressure luminous.If under latter event, when voltage is low, multicolour display tube sends red, green mixed light, by changing the duty of double-colored liquid crystal light valve, liquid crystal light valve can only make ruddiness or green glow pass through.When voltage was higher, multicolour display tube mainly sent blue light, so just can realize panchromatic demonstration.
The video screen manufacture method has following three kinds:
1. hybrid method: the fluorescent powder that voltage-sensitive type multicolor displaying tube fluorescent screen adopts is by three kinds of powder, and for example the red, green, blue powder mixes, wherein a kind of powder, and for example blue powder or wherein two kinds of powder, for example there is restraining barrier (not luminescent layer) on the surface of rouge and powder and green powder.
2. onion formula method: the fluorescent powder that voltage-sensitive type multicolor displaying tube fluorescent screen adopts is mixed and is formed by two kinds of onion formula voltage-sensitive type fluorescent powder, and its kernel is respectively two kinds of powder, for example rouge and powder and green powder, and shell is all another kind of powder, for example blue powder.
3. laminated type method: voltage-sensitive type multicolor displaying tube fluorescent screen is a laminated structure, its ground floor (shielding a side by glass) adopts two kinds of powder, for example rouge and powder and green powder, the second layer (by electron gun one side) adopts another kind of powder, blue powder for example, between two-layer fluorescent powder, the restraining barrier can be set, or fluoroscopic ground floor (shielding a side by glass) adopts a kind of powder, blue powder for example, the second layer (by electron gun one side) adopts other two kinds of powder, for example rouge and powder and green powder also can be provided with the restraining barrier between two-layer fluorescent powder.
In fields such as color TV and terminal demonstration, using shadow mask or grid type CPT and CDT in a large number at present.Three groups of phosphor strips or point are arranged on its video screen usually, adopt three kinds of powder of red, green, blue respectively, three corresponding fluorescent powder of each self-excitation of electron beam, thus can realize panchromatic demonstration.If change three groups of phosphor strips on the video screen among shadow mask or grid type CPT and the CDT or point into two groups, electron beam is reduced to two bundles from three beams, and so, this multicolour display tube can be described as two-beam shadow mask or grid type multicolour display tube.In two groups of phosphor strips on this display tube video screen or the point, the fluorescent powder that one group of vermicelli or point adopt is by two kinds of powder, for example red, green powder mixes, and another group vermicelli or point adopt two kinds of powder of various combination, for example red, blue powder mixes, and perhaps wherein the fluorescent powder that adopts of one group of vermicelli or point is by two kinds of powder, and for example red, green powder mixes, another group vermicelli or point only adopt a kind of powder, for example blue powder.Under latter event, a branch of electron excitation blue powder sends blue light, and another beam electrons excites red, green powder sends red, green mixed light.By changing double-colored liquid crystal light valve duty, liquid crystal light valve can only make ruddiness or green glow pass through, and so also can realize panchromatic demonstration.
Fluorescent powder can adopt CPT and CDT red, green, blue powder, and for example blue powder adopts ZnS:Ag, and rouge and powder adopts Y2O2S:Eu, and green powder adopts ZnS:Cu, Au, and Al etc. also can adopt other cathode-ray tube fluorescent powder, and for example green powder adopts Y2O2S:Tb etc.
In this color display with new field order, double-colored liquid crystal light valve is not to adopt panchromatic LCLV structure, but adopts double-colored LCLV structure, and it is made up of two polaroids and middle liquid crystal cell.Two polaroids are dissimilar polytropism chromatic polarization sheets.
Liquid crystal cell is a half-wave ratarder, and when it was in " off " attitude, liquid crystal presented birefringence effect, plays a part half-wave retardation, can make incident polarized light half-twist during outgoing from liquid crystal cell.And when liquid crystal cell was in " on " attitude, liquid crystal did not present birefringence effect, and incident polarized light is by liquid crystal cell and unaffected.
Be example with voltage-sensitive type multicolour display tube below, the effect in color monitor of the double-colored liquid crystal light valve of brief description.Suppose that only blue powder is under low pressure luminous in this display tube, then wherein a polaroid is chosen as red indigo plant-turquoise polytropism chromatic polarization sheet, the red blue axle of its polarization axle is vertical mutually with turquoise axle, another piece polaroid is indigo plant-RGB polytropism chromatic polarization sheet, and the blue axle of its polarization axle is vertical mutually with the RGB axle.The blue light that so under low pressure sends is by liquid crystal light valve the time, and is unaffected.And ruddiness that under high pressure sends and green glow be when the liquid crystal light valve, because the difference of liquid crystal cell state, liquid crystal light valve can only make ruddiness or green glow pass through, thereby can realize panchromatic demonstration.
The electron beam of electric current responsive type multicolour display tube or voltage-sensitive type multicolour display tube can be single bundle, and its accelerating potential or acceleration electric current can change, and it and liquid crystal light valve constitute perfect form field sequence type color monitor.Voltage-sensitive type multicolour display tube or electric current responsive type multicolour display tube electron beam also can be two-beam, and they can have different acceleration electric current or accelerating potential, excite different fluorescent powder.They and liquid crystal light valve component part type field sequence type color monitor.Two-beam shadow mask or grid type multicolour display tube and liquid crystal light valve be component part type field sequence type color monitor also.
In brief, color monitor of the present invention is exactly to utilize the principle of double-colored LCLV/CRT system to realize that dual base color shows, utilize the principle of electric current responsive type multicolour display tube or voltage-sensitive type multicolour display tube again or utilize the look effect of selecting of shadow mask, aperture plate to realize that further the third primary colours show, thereby realize panchromatic demonstration.
Specify with example below.
Example 1
In Fig. 1, CRT is an electric current responsive type multicolour display tube, and its video screen adopts three kinds of fluorescent powder of red, green, blue, and wherein the current characteristics of rouge and powder and green powder is a sublinear, and the current characteristics of blue powder is a ultralinear.P1 is red indigo plant-turquoise polytropism chromatic polarization sheet, the red blue axle of its polarization axle is vertical mutually with turquoise axle, P2 is indigo plant-RGB polytropism chromatic polarization sheet, and the blue axle of its polarization axle is vertical mutually with the RGB axle, two polaroids all only the light that on its polarization axis direction, vibrates of permission pass through.C is a liquid crystal cell, and the OA axle is the optical axis of liquid crystal cell.
When quickening electric current hour, CRT sends red, green mixed light.After red, the green glow of unpolarized passed through P1, the primary colours green glow was by vertical polarization, and primary colours ruddiness is by horizontal polarization.When liquid crystal cell was in " off " attitude, liquid crystal presented birefringence effect, and it plays the half-wave ratarder effect, the green polarized light polarization direction half-twist of incident, and parallel with the green absorption axes of P2, green glow is interdicted.The red polarized light polarization direction of incident is half-twist also, and parallel with the RGB polarization axle of P2, ruddiness can pass through P2.When liquid crystal cell was in " on " attitude, liquid crystal did not present birefringence effect, and red, green polarized light is by behind the liquid crystal cell, and the polarization direction is all unaffected, because the effect of P2, only green glow passes through the LCLV system, and ruddiness is interdicted.When the acceleration electric current was big, CRT mainly sent blue light, and it can pass through the LCLV system.Therefore quicken electric current and the duty that changes liquid crystal light valve by changing, and utilize the eye storage characteristic of human eye, just can realize panchromatic demonstration.
Example 2
In Fig. 1, CRT is a voltage-sensitive type multicolour display tube, and its video screen adopts three kinds of fluorescent powder of red, green, blue, and wherein blue powder can be under low pressure luminous, and rouge and powder and green powder are only under high pressure luminous.P1 is red indigo plant-turquoise polytropism chromatic polarization sheet, the red blue axle of its polarization axle is vertical mutually with turquoise axle, P2 is indigo plant-RGB polytropism chromatic polarization sheet, and the blue axle of its polarization axle is vertical mutually with the RGB axle, two polaroids all only the light that on its polarization axis direction, vibrates of permission pass through.C is a liquid crystal cell, and the OA axle is the optical axis of liquid crystal cell.
When accelerating potential was low, CRT only sent blue light, and no matter liquid crystal cell is in any state, and it all can pass through the LCLV system.When accelerating potential was higher, that CRT sends was red, the mixed light of green glow (blue light is weak).Press the explanation in the example 1, by changing the duty of liquid crystal cell, liquid crystal light valve can only make green glow or ruddiness pass through.Therefore pass through to change the duty of accelerating potential and liquid crystal light valve, and utilize the human eye vision persistence characteristic, just can realize panchromatic demonstration.
Example 3
In Fig. 2, CRT is a two-beam shadow mask multicolour display tube, and two groups of phosphor strips are arranged on its video screen, and wherein one group of vermicelli adopts red, blue two kinds of powder, and another group vermicelli adopt green, blue two kinds of powder.P1 be red green-blue polytropism chromatic polarization sheet, red green axle of its polarization axle and blue axle are vertical mutually, its light that permission is vibrated on its polarization axis direction passes through, the light of all other polarization directions then all is absorbed.P2 is the muted color polaroid, and O is its absorption axes, it can absorb respectively with by direction of vibration and polaroid absorption axes that parallel with vertical light component.C is a liquid crystal cell, and the OA axle is the optical axis of liquid crystal cell.
When two beam electrons are all worked, a beam electrons only excites red, blue powder bar, it sends red, blue mixed light, another beam electrons only excites green, blue powder bar, it sends green, blue mixed light.The red, green, blue of unpolarized is by behind the P1, and ruddiness and green glow are by vertical polarization, and blue light is by horizontal polarization.When liquid crystal cell was in " off " attitude, liquid crystal presented birefringence effect, and it plays the half-wave ratarder effect, and red, the green polarized light polarization direction half-twist of incident parallels with the P2 absorption axes, and red, green glow is interdicted.And also half-twist of the blue polarized light polarization direction of incident, parallel with the RGB polarization axle of P2, blue light can pass through P2.When liquid crystal cell was in " on " attitude, liquid crystal did not present birefringence effect, and the red, green and blue polarized light is by behind the liquid crystal cell, and the polarization direction is all unaffected.Because the effect of P2, red, green glow can pass through the LCLV system, and blue light is interdicted.Therefore excite the state of different fluorescent powder and change liquid crystal cell by two electron beams respectively, and utilize the human eye vision persistence characteristic, just can realize panchromatic demonstration.
Claims (9)
1. new type colorful display is characterized in that it is made up of multicolour display tube and double-colored liquid crystal light valve.
2. according to the color monitor of claim 1, it is characterized in that multicolour display tube is an electric current responsive type multicolour display tube, the fluorescent powder that its video screen adopts is by three kinds of powder, for example the red, green, blue powder constitutes, wherein a kind of powder, for example brightness-the current characteristics of blue powder is a sublinear, all the other two kinds of powder, for example brightness-the current characteristics of rouge and powder and green powder is a ultralinear, perhaps two kinds of powder wherein, for example brightness-the current characteristics of rouge and powder and green powder is a sublinear, and another kind of powder, for example brightness one current characteristics of blue powder is a ultralinear.
3. according to the color monitor of claim 1, it is characterized in that multicolour display tube is a voltage-sensitive type multicolour display tube, the fluorescent powder that its video screen adopts is by three kinds of powder, and for example the red, green, blue powder constitutes, wherein a kind of powder, for example blue powder can be under low pressure luminous, and all the other two kinds of fluorescent powder, for example rouge and powder and green powder are only under high pressure luminous, or two kinds of fluorescent powder wherein, for example rouge and powder and green powder can be under low pressure luminous, another kind of fluorescent powder, and for example blue powder is only under high pressure luminous.
4. according to the color monitor of claim 3, it is characterized in that: the fluorescent powder that voltage-sensitive type multicolor displaying tube fluorescent screen adopts is by three kinds of powder, for example the red, green, blue powder mixes, wherein a kind of powder, for example blue powder or wherein two kinds of powder, for example all there is restraining barrier (not luminescent layer) on the surface of rouge and powder and green powder.
5. according to the color monitor of claim 3, it is characterized in that: the fluorescent powder that voltage-sensitive type multicolor displaying tube fluorescent screen adopts is mixed by two kinds of onion formula fluorescent powder, and its kernel is respectively two kinds of powder, for example rouge and powder and green powder, shell is all another kind of powder, for example blue powder.
6. according to the color monitor of claim 3, it is characterized in that: voltage-sensitive type multicolor displaying tube fluorescent screen is a laminated structure, its ground floor (shielding a side by glass) adopts two kinds of powder, for example rouge and powder and green powder, the second layer (by electron gun one side) adopts another kind of powder, blue powder for example, between two-layer fluorescent powder, the restraining barrier can be set, or fluoroscopic ground floor (shielding a side by glass) adopts a kind of powder, blue powder for example, the second layer (by electron gun one side) adopts other two kinds of powder, and for example rouge and powder and green powder also can be provided with the restraining barrier between two-layer fluorescent powder.
7. according to the color monitor of claim 1, it is characterized in that multicolour display tube is two-beam shadow mask or grid type multicolour display tube, two groups of phosphor strips or point are arranged on its video screen, wherein the fluorescent powder that adopts of one group of vermicelli or point is by two kinds of powder, for example red, green powder mixes, and another group vermicelli or point adopt two kinds of powder of various combination, for example red, blue powder mixes, or wherein the fluorescent powder that adopts of one group of vermicelli or point by two kinds of powder, for example red, green powder mixes, another group vermicelli or point adopt another kind of powder, for example blue powder.
8. according to the color monitor of claim 1, it is characterized in that: double-colored liquid crystal light valve is made up of two polaroids and middle liquid crystal cell.
9. according to the color monitor of claim 1, it is characterized in that the electron beam of multicolour display tube can be Dan Shu, it quickens electric current or accelerating potential can change, and also can be two-beam, and they can have different acceleration electric current or accelerating potential, excite different fluorescent powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96117312A CN1095552C (en) | 1996-12-01 | 1996-12-01 | Colour display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96117312A CN1095552C (en) | 1996-12-01 | 1996-12-01 | Colour display device |
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| Publication Number | Publication Date |
|---|---|
| CN1165359A true CN1165359A (en) | 1997-11-19 |
| CN1095552C CN1095552C (en) | 2002-12-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96117312A Expired - Fee Related CN1095552C (en) | 1996-12-01 | 1996-12-01 | Colour display device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100520871C (en) * | 2002-11-06 | 2009-07-29 | 佳能株式会社 | Color display element, method for driving color display element, and display apparatus having color display element |
| CN100584033C (en) * | 2004-07-02 | 2010-01-20 | 皇家飞利浦电子股份有限公司 | Color display and its control method |
-
1996
- 1996-12-01 CN CN96117312A patent/CN1095552C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100520871C (en) * | 2002-11-06 | 2009-07-29 | 佳能株式会社 | Color display element, method for driving color display element, and display apparatus having color display element |
| CN100584033C (en) * | 2004-07-02 | 2010-01-20 | 皇家飞利浦电子股份有限公司 | Color display and its control method |
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| Publication number | Publication date |
|---|---|
| CN1095552C (en) | 2002-12-04 |
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