CN101071719A - Shadow mask for cathode ray tube and cathode ray tube having thereof - Google Patents
Shadow mask for cathode ray tube and cathode ray tube having thereof Download PDFInfo
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- CN101071719A CN101071719A CNA2007101053928A CN200710105392A CN101071719A CN 101071719 A CN101071719 A CN 101071719A CN A2007101053928 A CNA2007101053928 A CN A2007101053928A CN 200710105392 A CN200710105392 A CN 200710105392A CN 101071719 A CN101071719 A CN 101071719A
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- shadow mask
- effective screen
- sub
- ray tube
- cathode ray
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B1/00—Devices for lowering persons from buildings or the like
- A62B1/22—Devices for lowering persons from buildings or the like by making use of jumping devices, e.g. jumping-sheets, jumping-mattresses
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- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
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- Electrodes For Cathode-Ray Tubes (AREA)
Abstract
A shadow mask for a cathode ray tube and the cathode ray tube having the same are provided. A shadow mask comprises an effective screen part including beam passing holes arranged in a predetermined pattern and a non-effective screen part to surround the effective screen part. The beam passing holes are respectively installed on a first side with a small-sized hole part where the electron beam emittes and a second side opposite to the first side with a large-sized hole part. The large-sized hole part of the beam passing hole arranged at a peripheral portion of the effective screen part is larger than the large-sized hole part of the beam passing hole arranged at a central portion of the effective screen part. The shadow mask satisfies one of the following conditions: 0.9M<SUB>1/2</SUB><=M<SUB>C</SUB><=0.98M<SUB>1/2</SUB>;1.03M1/2</SUB> <=M<SUB>E</SUB><=1.1M<SUB>1/2</SUB>, wherein the M<SUB>1/2</SUB> is unit area weight of 1/2 part of intermediate portion from the central portion of the effective screen part to border between the effective screen part and non-effective screen part; M<SUB>C</SUB> is unit area weight of central portion of the effective screen part; M<SUB>E</SUB> is unit area weight of peripheral portion of the effective screen part.
Description
Technical field
The present invention relates to a kind of cathode ray tube, more particularly, relate to a kind of shadow mask that improves impact strength.
Background technology
Usually, cathode ray tube is designed to utilize and makes the redness, green and the blue-fluorescence thing that are formed at panel inner surface by deflecting coil deflection, through shadow mask with color selection function and bombardment from the electron gun electrons emitted activate fluorescence to come display image.
Shadow mask has by making electron beam quicken to arrive the function that the target fluorescence is selected color.In order to realize this function, make shadow mask have a plurality of radiation channel holes (beam passagehole) of arranging according to predetermined pattern.
Can form described radiation channel hole by means of on two surfaces of shadow mask, carrying out photoetching treatment.That is to say, on two surfaces of material for shadow mask, deposit photoresist, a pair of circular slab that has the radiation channel hole pattern separately is positioned on each photoresist layer.Expose again and development treatment, to form photoresist figure corresponding to the circular slab figure.Then, the material for shadow mask with photoresist figure is carried out etching, to form the radiation channel hole.
Each radiation channel hole all have the top incident that is formed at shadow mask the small hole size part from the first surface of electron gun electrons emitted bundle is arranged and be formed at the first surface opposing second surface on the oversized hole part.Therefore, when the electron beam with predetermined deflection angle passes the radiation channel hole, can prevent the collision of electron beam and shadow mask.
But, if the oversized hole in radiation channel hole part is too little since with the shadow mask collision, cause scattering or spreading from the restriction phenomenon (clipping phenomenon) of electron gun electrons emitted bundle.
Otherwise if the oversized hole in radiation channel hole part is too big, the weight saving of shadow mask causes the impact strength variation of shadow mask.
Summary of the invention
The purpose of this invention is to provide a kind of a plurality of shadow masks that have the radiation channel hole of different size because of the position difference that have.The present invention also provides a kind of cathode ray tube with this shadow mask.
In the present invention's one illustrative embodiments, the shadow mask that is used for cathode ray tube comprises the effective screen part with the radiation channel hole of arranging according to predetermined pattern and centers on the effectively invalid screen part of screen part, wherein each radiation channel hole is set at top incident electron beam, have the first side place of small hole size part and have the oversized hole part, the second side place relative with first side, and be positioned at the size of the size in each the radiation channel hole on the peripheral part of effective screen part less than each the radiation channel hole on the core that is positioned at effective screen part, wherein shadow mask meet the following conditions one of at least:
0.9M
1/2≤M
C≤0.98M
1/2
1.03M
1/2≤M
E≤1.1M
1/2
Herein, M
1/2Be in weight from the core of effective screen part to the unit are of 1/2 part of the bisecting point of the distance on the border effective screen part and the invalid screen part; M
CBe the weight of effectively shielding the unit are of core partly; M
EBe the weight of effectively shielding the unit are of peripheral part partly.
Effectively the screen part is rectangular, and the central point of 1/2 part is positioned at the mid point of the dotted line that extends to the summit of rectangle from the central point of rectangle, and core has the central point that is positioned at rectangular centre point place, peripheral part simultaneously with the adjacent contact both sides of rectangle.
Each of 1/2 part, core and peripheral part can be defined in the border circular areas that diameter is 20mm.
In addition, the size of oversized hole part is strengthened gradually from 1/2 part to core and reduce gradually to peripheral part from 1/2 part.
In addition, the oversized hole part can be eccentric in the small hole size part along the incident direction of beam.
In addition, shadow mask also can comprise the circle segment (skirtportion) that shields the curved edge of part from invalid, wherein will effectively shield partly to form to have predetermined curvature.
In another illustrative embodiments of the present invention, provide a kind of cathode ray tube with described shadow mask.
This cathode ray tube can be applied to monitor.The maximum deflection angle of electron beam can be equal to or greater than 110 °.
Description of drawings
Below in conjunction with accompanying drawing embodiments of the present invention are described, by describing, these and/or other aspect of the present invention and advantage will become more clear and be more readily understood.In the accompanying drawing:
Fig. 1 is the part cross section and perspective of the cathode ray tube of the present invention's one illustrative embodiments;
Fig. 2 is the shadow mask perspective view of the present invention's one illustrative embodiments;
Fig. 3 A and 3B are the radiation channel hole sectional views of shadow mask shown in Figure 2;
Fig. 4 is the top plan view of effective screen part of shadow mask shown in Figure 2;
The curve of Fig. 5 A, 5B and 5C shows the situation that weight ratio becomes with the distance from effective screen part center of shadow mask shown in Figure 2.
Embodiment
Those skilled in the art followingly some embodiments of the present invention are described, so that can implement with reference to accompanying drawing.Such just as those skilled in the art are aware, under the prerequisite that does not exceed design of the present invention or scope, can retrofit to described these execution modes by various different modes.As possible, identical Reference numeral is represented same or analogous parts in whole accompanying drawings.
Fig. 1 is the part cross section and perspective of the cathode ray tube of the present invention's one illustrative embodiments, and Fig. 2 is the perspective view of the shadow mask of the present invention's one illustrative embodiments.
With reference to figure 1 and Fig. 2, cathode ray tube 100 comprises the vacuum casting that limits its outward appearance.This vacuum casting comprises panel 10, conical section 12 and neck 14.The vacuum casting installed inside has shadow mask 16 and electron gun 18, and deflecting coil 20 is installed in the vacuum casting outside.
Be deposited on the inner surface of panel 10 by the fluorescence coating 22 that forms according to redness, green and the blue-fluorescence thing of predetermined pattern arrangement.Between fluorescence, form black matrix layer (black matrix layer).Each fluorescence can form circular point shape or stripe-shaped.
The electron gun 18 that is used for divergent bundle is installed on neck 14, is used to make the deflecting coil 20 of the electron beam deflecting to be installed in the outer peripheral face of conical section 12.
As depicted in figs. 1 and 2, shadow mask 16 has a plurality of radiation channel holes 26 of arranging according to predetermined pattern.
Each radiation channel hole 26 can be formed roughly circle, rectangle roughly or stripe-shaped roughly.
For shadow mask 16 is fixed on the framework 24, circle segment 164 extends from the edge of invalid screen part 162.
Aforesaid cathode ray tube utilization makes it by deflecting coil 20 deflections from electron gun 18 electrons emitted, through having the radiation channel hole 26 of shadow mask 16 of color selection function, and redness, green and the collision of blue-fluorescence thing of the fluorescence coating 22 that forms with panel 10 inner surfaces and activate fluorescence and come display image.
Below the radiation channel hole will be described in more detail.Fig. 3 A is the sectional view that is positioned at the radiation channel hole 260 of effective screen core partly, and Fig. 3 B is the sectional view that is positioned at the radiation channel hole 262 of effective screen peripheral part partly.In addition, Fig. 4 is the plane graph that effectively shields part 160.
Radiation channel hole 260,262 is set at the first side place and the second side place relative with first side, that have oversized hole part 260a, 262a that top incident has electron beam, has small hole size part 260a, 262a.
As shown in Figure 3A, being formed at the small size in the radiation channel hole 260 on the core of effective screen part 160 and oversized hole part 260a and 260b is formed with one heart.Simultaneously shown in Fig. 3 B, be formed at the small size in the radiation channel hole 262 on the peripheral part of effective screen part 160 and oversized hole part 262a and 262b and formed prejudicially.
To effectively shield part 160 when being divided into four quadrants, the oversized hole part 262b in radiation channel hole 262 can change according to the position of access opening to the eccentric direction of small hole size part 262a.That is, the eccentric direction in radiation channel hole 262 can be determined according to the incident direction of the electron beam that passes therefrom.
That is to say that when electron gun side was watched, for the radiation channel hole 262 that is positioned at first quartile, oversized hole part 262a was eccentric in small hole size part 262a to the right.
For the radiation channel hole 262 that is positioned at second quadrant, oversized hole part 262a is eccentric in small hole size part 262a left.For the radiation channel hole 262 that is positioned at third quadrant, oversized hole part 262a below left is eccentric in small hole size part 262a.For being positioned at four-quadrant radiation channel hole 262, oversized hole part 262a is eccentric in small hole size part 262a to the lower right.
Can be according to the deflection angle of electron beam and the eccentricity that changes oversized hole part 262b and small size passage hole 262a from the center of effective screen part 160 to the distance in corresponding radiation channel hole 262.
As mentioned above, owing to be formed with radiation channel hole 262, make oversized hole part 262b, therefore can prevent to collide and the restriction phenomenon that causes by electron beam and shadow mask along the direction off-centre of the electron beam deflecting.
Simultaneously, shown in Fig. 3 A and 3B, the oversized hole part 260b in radiation channel hole 260 of central part office that is positioned at effective screen part is greater than the oversized hole part 262b in the radiation channel hole 262 of the peripheral part that is positioned at effective screen part.
Can be according to by D=-ax
2+ bx+c (herein, a, b and c are constants, and x is the distance from effective screen center partly to the radiation channel hole) quadratic function of expression is set the diameter of oversized hole part.
Form shadow mask as described above, effectively the weight of the unit are of the peripheral part of screen part is greater than the weight of the unit are of the core that effectively shields part.
Therefore, when external impact puts on the shadow mask, because the weight of core less than the weight of peripheral part, can reduce to divide the impulsive force that is sent to peripheral part from central division.
Moreover, because the weight of peripheral part increases, bear the impact strength of the impulsive force that branch from central division transmits and also strengthened.And, make shadow mask minimum and strengthened total impact strength of shadow mask in the distortion of peripheral part.
Simultaneously, as shown in Figure 4, can form rectangle with effectively shielding part 160, wherein 1/2 part and peripheral part are positioned at along on the diagonal that extends from the center to the turning.
Because core, 1/2 part and peripheral part are the imaginary area that is used for measurement unit's area weight, therefore they are expressed as the border circular areas that each all has the 20mm diameter.
With reference to Fig. 4, the peripheral part and the effective contact both sides of screen part 160, and 1/2 part is positioned on the mid point of dotted line L on the center that connects effective screen part 160 and summit.
Thus, the shadow mask that forms this illustrative embodiments satisfies one of following formula 1 and 2.
0.9M
1/2≤M
C≤0.98M
1/2
Formula 2
1.03M
1/2≤M
E≤1.1M
1/2
Wherein, M
1/2Be the weight of 1/2 part unit are; M
CBe the weight of core unit are; M
EBe the weight of peripheral part unit are.
According to formula 1 and 2, the weight of core unit are is less than the weight of 1/2 part unit are, and the weight of peripheral part unit are is greater than the weight of the unit are of 1/2 part.
That is to say that the size of oversized hole part is assigned to peripheral part from central division and reduced gradually.Therefore, as mentioned above, total impact strength improves.
Yet if the weight per unit area of core is less than 0.9 times of the weight per unit area of 1/2 part, the weight of the unit are of core is excessively reduced, so the impact strength of core reduces.In view of the above, if external impact puts on the shadow mask, therefore destroyed the or fracture of core possibility makes total impact strength of shadow mask reduce.
In addition, if the weight per unit area of core is greater than 0.98 times of the weight per unit area of 1/2 part, because the weight of core is excessively increased, the impulsive force that passes to periphery increases, thereby the effect of improving of total impact strength is reduced.
Therefore, the scope of the weight per unit area of core is 0.9 times to 0.08 times of weight per unit area of 1/2 part.
Simultaneously, if the weight per unit area of peripheral part is less than 1.03 times of 1/2 part per unit area weight, the weight of peripheral part is less relatively, thereby has reduced the effect of improving of total impact strength.
If the weight per unit area of peripheral part is greater than 1.1 times of the weight per unit area of 1/2 part, the size of oversized hole part is excessively reduced, thereby may limit phenomenon.If keep the size in radiation channel hole when the radiation channel hole number reduces, the resolution of cathode ray tube is understood variation so, and because the interference between electron beam scanning spacing and the vertical interval can produce not A Xianxiang (moir é phenomenon).
So the scope of the weight of the unit are of peripheral part is 1.03 times to 1.1 times of weight per unit area of 1/2 part.
Below multiple example and comparative example will be described, to confirm effect of the present invention.For these test example and comparative example, the thickness of each shadow mask of being prepared is 0.1t, effectively shield portion size is 17 inches.Effectively core, 1/2 part and the peripheral part of screen part are limited by the border circular areas with 20mm diameter.
To be used for these test examples becomes to make the weight of unit are to assign to peripheral part from central division with each mask design of comparative example to increase gradually.
Test example 1 and 2 shadow mask are designed to satisfy the condition of the weight per unit area of described restriction, and the shadow mask of comparative example 1 and 2 is designed to not satisfy described condition.
Following form 1 shows the weight ratio according to the position of effective screen part of the shadow mask of test example 1 and 2.Fig. 5 A, 5B and 5C show respectively along horizontal direction (X-axis shown in Figure 4), diagonal and the measured weight ratio of vertical direction (Y-axis shown in Figure 4) of effective screen part of the shadow mask of test example 1.
Following form 2 shows impact strength and the weight ratio that records on center, 1/2 part and the peripheral part of effective screen part of each shadow mask in test and the comparative example.
Weight ratio in the form 1 and 2 is the value that the weight with respect to 1/2 part calculates, and the weight ratio among Fig. 5 A and the 5B is the value that the weight with respect to core calculates.
| Test example 1 | Test example 2 | |||
| The position | Weight ratio | The | Weight ratio | |
| 0 | 0.971 | 0 | 0.977 | |
| 60 | 0.983 | 60 | 0.994 | |
| 90 | 1.000 | 90 | 1.000 | |
| 120 | 1.023 | 120 | 1.011 | |
| 150 | 1.046 | 1 50 | 1.028 | |
| 180 | 1.052 | 1 80 | 1.034 | |
Form 2
As shown in Table 2, be designed to satisfy the test example 1 of described condition and 2 impact strength is respectively 36.2G and 34.4G.Be designed to not satisfy the comparative example 1 of described condition and 2 impact strength is respectively 32.1G and 31.5G.
That is to say that table 2 shows that satisfying the test example 1 of described condition and 2 impact strength can be further improved.
In comparative example 1, the weight ratio of weight ratio peripheral part greater than the weight ratio of core of the present invention that the radiation channel hole is designed so that its core is less than the weight ratio of peripheral part of the present invention, the weight of core excessively increases, thereby is sent to the impulsive force increasing of peripheral part.Therefore, peripheral part is easy to be divided the impulsive force that sends to destroy or fracture from central division.
In comparative example 2, the weight ratio of weight ratio peripheral part less than the weight ratio of core of the present invention that the radiation channel hole is designed so that its core is greater than the weight ratio of peripheral part of the present invention, the weight of core excessively reduces, so total impact strength of shadow mask is reduced.
Can apply the present invention to the shadow mask of 0.15-0.25t used in the cathode ray tube of the shadow mask of 0.1-0.12t used in the cathode ray tube of monitor and television set.
Certainly, if the shadow mask of this illustrative embodiments of the present invention is applied to cathode ray tube to the monitor of outside shock-sensitive, effect is more remarkable.
Being applied to maximum deflection angle as if the shadow mask with this illustrative embodiments of the present invention is 110 ° or bigger cathode ray tube, and shadow mask of the present invention has better effect.
According to the present invention, because the weight of unit are changes according to the radiation channel hole dimension, so can improve the impact strength of shadow mask.In addition, because the shape in radiation channel hole changes with the position of effective area, so can prevent to limit phenomenon.
If cathode ray tube has large scale or is flat condition, can improve described effect more.
Although illustrated and described illustrative embodiments more of the present invention; it will be appreciated by those skilled in the art that; under the prerequisite that does not exceed principle of the present invention and design; can carry out conversion to this execution mode, protection scope of the present invention is defined in the scope and equivalency range thereof that claim explains.
Claims (9)
1, a kind of shadow mask that is used for cathode ray tube comprises:
Effective screen part with the radiation channel hole of arranging according to predetermined pattern;
Around the invalid screen part of described effective screen part,
Wherein, each described radiation channel hole is set at the first side place and the second side place relative with described first side, that have the oversized hole part that top incident has electron beam, has the small hole size part; And
Be positioned at the size of the size in each the radiation channel hole on described effective screen peripheral part partly less than each the radiation channel hole on the core that is positioned at described effective screen part,
Wherein shadow mask meet the following conditions one of at least:
0.9M
1/2≤M
C≤0.98M
1/2
1.03M
1/2≤M
E≤1.1M
1/2
Herein, M
1/2Be to be centered close to from described effective screen center partly to described effective screen partly and the weight of the unit are of 1/2 part of the bisecting point of the distance on the border the invalid screen part; M
CBe the weight of the unit are of described effective screen core partly; M
EBe the weight of the unit are of described effective screen peripheral part partly.
2, shadow mask as claimed in claim 1, wherein, described effective screen part is rectangular;
The central point of described 1/2 part is positioned at the midpoint of dotted line that extends to the summit of this rectangle from the central point of described rectangle;
Described core has the central point of the central spot that is positioned at described rectangle; And
Described peripheral part simultaneously with the adjacent contact both sides of described rectangle.
3, shadow mask as claimed in claim 2, wherein, each of described 1/2 part, core and peripheral part is limited in the border circular areas with 20mm diameter.
4, shadow mask as claimed in claim 1, wherein, the size of described oversized hole part strengthens gradually from described 1/2 part to described core and reduces gradually to described peripheral part from described 1/2 part.
5, shadow mask as claimed in claim 4, wherein, described oversized hole part is eccentric in described small hole size part along the beam incident direction.
6, shadow mask as claimed in claim 1 wherein, also comprises from the circle segment of the curved edge of described invalid screen part, and wherein said effective screen part is formed has predetermined curvature.
7, a kind of cathode ray tube that has as each described shadow mask among the claim 1-6.
8, cathode ray tube as claimed in claim 1 is applied to monitor.
9, cathode ray tube as claimed in claim 7, wherein, the maximum deflection angle of electron beam is equal to or greater than 110 °.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020060016403A KR20070083111A (en) | 2006-02-20 | 2006-02-20 | Shadow mask for cathode ray tube and cathode ray tube having thereof |
| KR16403/06 | 2006-02-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101071719A true CN101071719A (en) | 2007-11-14 |
Family
ID=38612543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101053928A Pending CN101071719A (en) | 2006-02-20 | 2007-02-17 | Shadow mask for cathode ray tube and cathode ray tube having thereof |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR20070083111A (en) |
| CN (1) | CN101071719A (en) |
-
2006
- 2006-02-20 KR KR1020060016403A patent/KR20070083111A/en not_active Application Discontinuation
-
2007
- 2007-02-17 CN CNA2007101053928A patent/CN101071719A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| KR20070083111A (en) | 2007-08-23 |
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| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20071114 |