CN2134762Y - Tv and projection dual-purpose set - Google Patents
Tv and projection dual-purpose set Download PDFInfo
- Publication number
- CN2134762Y CN2134762Y CN 92231565 CN92231565U CN2134762Y CN 2134762 Y CN2134762 Y CN 2134762Y CN 92231565 CN92231565 CN 92231565 CN 92231565 U CN92231565 U CN 92231565U CN 2134762 Y CN2134762 Y CN 2134762Y
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- commutator
- series
- projection
- dual
- purpose machine
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Abstract
The utility model relates to a TV and projection dual-purpose machine, which has two functions of television and projection television, and the two functions can be conveniently shifted. The primary structural characteristic of the dual-purpose machine is that the field deflecting coil, the line deflecting coil and the capacitors of line retrace are separately connected in series with resistors, inductors and capacitors C through double-throw switches, and the both ends of the field deflecting coil are connected in series with a linkage double-throw switch. Moreover, the front of a screen is provided with a projecting lens. With the refitting, the effect of the condensation and the inversion of screen images can be achieved, and the lens caliber D and the relative caliber F are both reduced correspondingly. The utility model has the advantages of simple structure, low cost and convenient and flexible operation.
Description
The utility model relates to and a kind ofly has TV and two kinds of functions of projection TV, and can make things convenient for the dual-purpose machine of television projection of conversion mutually.
Projection TV is compared with TV, and it is big to have a picture, the advantage that telepresenc is strong.Existing projection TV adopts the three-tube type structure mostly, promptly constitute by the small-sized picture tube configuration three cover optical projection systems of red, green, blue three monochromatic high brightness, though it can obtain projected picture preferably, but its complete machine structure complexity, the cost of manufacture height, price is expensive, during use environmental condition is had certain requirement, function singleness in addition, thereby be difficult to vast average family and accept.
Task of the present utility model is to avoid above-mentioned weak point and provides a kind of television projection dual-purpose machine, and it is not only simple in structure, and cost of manufacture is low, and has TV and two kinds of functions of projection TV, and can realize mutual conversion easily.
The utility model is realized by following scheme: have the television set 1 that is made of circuit and picture tube, its difference is that field deflection coil 4 places in TV set circuit are connected in series a commutator K5-1, a road of commutator K5-1 is connected in series a resistance R 1, be connected in series a commutator K5-5 at line deflector coil 5 places, a road of commutator K5-5 is connected in series an inductance L 1, the retrace interval capacitor place of being expert at is connected in series a commutator K5-4, a road of commutator K5-4 is connected in series a capacitor C 1, and K5-5, K5-4 is a linked switch, simultaneously at the two ends of field deflection coil 4 serial connection one interlock commutator K5-2, K5-3, in addition, a projection lens 3 is set before screen of TV set.
According to above-mentioned scheme, with commutator K5-1, K5-4, K5-5 is allocated to straight-through (short circuit) position, K5-2 and K5-3 are that forward is connected the position, as shown in Figure 3, then original circuit remains unchanged in the television set, screen display is image normally, take off projection lens 3, promptly can be used as common television set uses, if with commutator K5-1, K5-4, K5-5 is allocated to element serial connection position, and interlock commutator K5-2 and K5-3 oppositely connect the position, then can produce following effect: one, seal in inductance L 1 and can reduce to flow through the electric current (increasing its inductance) of line deflector coil, so that the horizontal sweep deflection amplitude reduces; They are two years old, seal in resistance R 1 and can reduce the electric current (increasing its resistance) of field deflection coil, the vertical scanning deflection amplitude is reduced accordingly, thereby make shown visual scaled of screen, they are three years old, seal in C1 and reduced line retrace electric capacity, guarantee that original LC value is constant, make the parameter constant by the TV horizontal output circuit of LC value decision, the luminous flux that reaches screen is constant, thereby the image brightness that dwindles is improved in proportion, finish the concentrating function of image; Its four, the reverse connection of interlock commutator K5-2, K5-3 makes field deflection coil 4 tap reversal connections, causes the image of screen to be inverted, and can be convenient to directly show by projection lens 3.
According to above-mentioned analysis, the utility model has only been set up five commutators and resistance, electric capacity, inductance on the original circuit of television set, so structure is very simple.Concentrating of screen image, help disposing the projection lens of suitable parameters, make the relative aperture F(f/D of projection lens) and bore D all correspondingly dwindle, this not only helps the raising of camera lens concentration ratio, guarantee the quality of projection image, but also reduced the cost of manufacture of projection lens.The utlity model has the dual-use function of TV and projection TV, the user can be according to circumstances with require random switching, flexible and convenient to use, and the complete machine cost compares with the projection TV of single performance greatly and reduce, thereby can be convenient to it and promote the use of.
The utility model screen image minification of size in length and breadth is 0.7-0.3, and generally getting minification is 0.5, and promptly image area dwindles 4 times.
Fig. 1,2 is a shape assumption diagram of the present utility model.
Fig. 3 is the circuit diagram of an embodiment of the utility model.
Fig. 4 is the circuit diagram of another embodiment of the utility model.
An embodiment of the present utility model such as Fig. 1,2, shown in 3, has television set 1, be equipped with a movable sealing cover 2 before the screen of TV set, the time spent can not open to a side, as shown in Figure 2, be installed on projection lens 3 before the sealing cover, the relative aperture F=2.0 of projection lens, in the circuit in television set, at field deflection coil 4(VERT, D, Y) end is connected in series a commutator K5-1, a road of this commutator is connected in series a resistance R 1, at line deflector coil 5(HOR, D, Y) end is connected in series a commutator K5-5, and a road of this commutator is connected in series an inductance L 1, and the retrace interval capacitor of being expert at (C313) end is connected in series a commutator K5-4, a road of this commutator is connected in series a capacitor C 1, present embodiment 1 image size minification in length and breadth is 0.5, and image area dwindles 4 times, respectively is connected in series a commutator K5-2 at the two ends of field deflection coil 4 simultaneously, K5-3, above-mentioned 5 switches can be formed the moving K switch 1 of a 5-linked, when having strengthened its conversion position like this operation reliability.In addition, also can respectively be connected in series a commutator K2-1, K2-2, and constitute linked switch K2 at line deflector coil 5 two ends, as shown in Figure 4, can make screen image side-inverted like this, to be used for the transmission-type projection, also K1 and synthetic seven linked switches of K2 can be constituted the transmission-type projection TV.China XT-3702 type 14 inch colour TV circuit that the circuit of the foregoing description is got.
Claims (5)
1, a kind of have TV and two kinds of functions of projection TV, and can make things convenient for the dual-purpose machine of changing of television projection mutually, has the television set 1 that constitutes by circuit and picture tube, it is characterized in that field deflection coil 4 places in TV set circuit are connected in series a commutator K5-1, a road of commutator K5-1 is connected in series a resistance R 1, be connected in series a commutator K5-5 at line deflector coil 5 places, a road of commutator K5-5 is connected in series an inductance L 1, the retrace interval capacitor place of being expert at is connected in series a commutator K5-4, a road of commutator K5-4 is connected in series a capacitor C 1, and K5-5, K5-4 is a linked switch, simultaneously at the two ends of field deflection coil 4 serial connection one interlock commutator K5-2, K5-3, in addition, a projection lens 3 is set before screen of TV set.
2, by the dual-purpose machine of the described television projection of claim 1, it is characterized in that screen image in length and breadth the minification of size be 0.7-0.3.
3, by claim 1 or the dual-purpose machine of 2 described television projection, it is characterized in that commutator K5-1, K5-4, K5-5, K5-2, K5-3 can form First Five-Year Plan linked switch K1.
4, by claim 1 or the dual-purpose machine of 2 described television projection, it is characterized in that also can being connected in series a commutator K2-1, K2-2, and constitute linked switch K2 at line deflector coil 5 two ends.
5, by claim 1 or the dual-purpose machine of 2 described television projection, it is characterized in that being equipped with a movable sealing cover 2 before the screen, be installed on projection lens 3 before the sealing cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92231565 CN2134762Y (en) | 1992-08-24 | 1992-08-24 | Tv and projection dual-purpose set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92231565 CN2134762Y (en) | 1992-08-24 | 1992-08-24 | Tv and projection dual-purpose set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2134762Y true CN2134762Y (en) | 1993-05-26 |
Family
ID=33774390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92231565 Expired - Fee Related CN2134762Y (en) | 1992-08-24 | 1992-08-24 | Tv and projection dual-purpose set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2134762Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1075318C (en) * | 1995-09-29 | 2001-11-21 | 索尼公司 | Rear projection television |
-
1992
- 1992-08-24 CN CN 92231565 patent/CN2134762Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1075318C (en) * | 1995-09-29 | 2001-11-21 | 索尼公司 | Rear projection television |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |