CN1027565C

CN1027565C - Protector for cathoda-ray tube

Info

Publication number: CN1027565C
Application number: CN 90105647
Authority: CN
Inventors: 顾浩; 陈群; 许龙金
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-04-24
Filing date: 1990-04-24
Publication date: 1995-02-01
Anticipated expiration: 2005-04-24
Also published as: CN1056208A

Abstract

The present invention relates to a protection device for cathode-ray tubes, which is suitable to be used for eliminating high voltage electrons transmitted from picture tubes so as to generate a high voltage electrostatic field in displays of color televisions, etc. The protection device is composed of glass (1), a frame (2) and an electrostatic releaser (3), wherein a transparent conducting film is coated on the surface of the glass, the frame is a conducting frame, the glass is arranged in the frame, the electrostatic releaser (3) is a two-end device formed by connecting a discharge element (4) with a resistor (5) in parallel, one end of the electrostatic releaser (3) is connected with the frame (2), and the other end is connected with the ground, a zero phase wire or a power supply phase wire.

Description

Protector for cathoda-ray tube

The present invention is a kind of protector for cathoda-ray tube.Be applicable to the protection of the display of picture color television set one class.

Picture color television set one class because cathode ray tube penetrates the high-pressure electronic bundle, produces the high-voltage electrostatic field with the display of cathode ray tube video picture before pipe, electrostatic field makes airborne dust bacterium charged, causes the harm to human body.Eliminate the high-voltage electrostatic field and promptly become the current problem that will solve.

Task of the present invention is to propose a kind of protector of eliminating the preceding high-voltage electrostatic field of cathode ray tube, and protector also can prevent the X line, and ultraviolet ray makes light soft, improves functions such as vision.

Technical scheme of the present invention is, protector is by glass (1), framework (2) and electrostatic leakage device (3) are formed, glass (1) is handled through tempering, and there is nesa coating coating on the surface, and framework is a conductive frame, glass places in the frame, the two-terminal device that electrostatic leakage device (3) is made up of arresting element (4) back in parallel with resistance R (5), an end (A end) is connected with framework (2), other end ground connection or connecting to neutral or be connected with the power supply phase line.Arresting element is a two-terminal element, and two ends respectively connect a metal, and metal can be that bar-shaped, wire, thread or sheet, rectangular thin plate shape, two metals disconnect, and does not connect, and has one less than 2 millimeters spatial joint clearance, and disconnecting opposite position can have the tip.Resistance R (5) can be an arbitrary value, even is null value.The resistance of resistance R can be less when the B of bleeder held ground connection, even be null value.The B of bleeder end can be connected with the power supply phase line, this time R resistance greater than 680K, the high-voltage electrostatic field on the glass (1) also can disappear.

Transparent conductive film layer on glass makes the glass conduction, by framework and the conducting of electrostatic leakage device, by the electrostatic leakage device high-pressure electrostatic is released, and eliminates electrostatic field on glass.

During use, this device places the preceding transparent conductive film layer of cathode ray tube, except that glass can be had the conducting function, can also improve vision, makes light become soft, can also absorb X line and ultraviolet ray simultaneously, has finished the invention task.

Fig. 1 is an embodiment

Fig. 2 is the embodiment of electrostatic leakage device

Fig. 3 is the arresting element structure

Fig. 4 is the changeover plug in the electrostatic leakage device is assembled in

Fig. 5 is assembled in inner plug with the electrostatic leakage device

Be described in detail protector below in conjunction with accompanying drawing.

Glass (1) (Fig. 1) surface has nesa coating coating, and conductive film layer can be the simple metal layer, and this metal can be a kind of of silver, copper, aluminium or gold or the mixture of the two.Conductive film layer also can be defective metal oxide layer, as one of zinc oxide, indium oxide, tin oxide or contain the stannic oxide layer of fluorine impurity.One of and for example tin-antimony oxide, or indium tin oxide, or tin bismuth oxide skin(coating), the glass that is coated with such class transparent conductive film layer has antistatic, absorbs ultraviolet ray and makes the soft function of light.

Framework (2) figure (1) is a conductive frame, and the structure of conductive frame can have following several design: the frame that (one) framework contacts with the glass conducting film is the electric conductor spare that is made of electric conducting material, as conductive plastic part.(2) framework is an ambroin spare, during injection moulding with the pre-buried elastic conducting strip in frame place of glass contact, elastic conducting strip keeps well contacting conducting with the glass conductive film layer.(3) framework has groove, and glass places in the groove, and conductive clip is arranged in the groove, and glass is clamped, and is connected conducting with the rete of leading of glass.Any design all will be drawn outside the framework with the tie point of conductive film layer by lead, and being connected of lead and framework can be with pre-buried structure.

Electrostatic leakage device (3) is a kind of two-terminal device that is formed in parallel by arresting element (4) and resistance R (5) (A end, a B end) (Fig. 2).Arresting element (4) is a two-terminal element, two ends respectively connect a metal, and two metals disconnect not conducting relatively, have one between the two less than 2 millimeters spatial joint clearances, bimetallic relative gap can have the tip, all is zigzag thin slice to be arranged (Fig. 3 a) as two metals.Can two metals all be to have most advanced and sophisticated wire rod or wire (Fig. 3 c) again.The shape of two metal gaps, also can the first have most advanced and sophisticated thin slice, opposite side is little rectangle plane shape (Fig. 3 b, Fig. 3 d), and perhaps two metal gaps are little rectangle plane (Fig. 3 e), also the apiculus that has needle-like wedge angle and so on can be arranged on the plane.

Arresting element (4) also can be to be that the opposite polarity thyrectors serial connection of 400 volts-800 volts two constitutes (Fig. 3 f) by the voltage stabilizing value.The resistance of resistance R (5) can be arbitrary value (0-∞), if output (B end) can guarantee ground connection, the resistance of R can be less, even get null value (being R=0).High-pressure electrostatic on glass is disappeared by ground connection.When not guaranteeing ground connection even during phase-connecting wire, desirable arbitrary value greater than 680K Ω.

Two metals of arresting element can place in the shell of an insulation, also can not have shell, and two metals are fixed on the insulation board.

Protector can be designed to individual member, becomes the protecting screen that is independent of outside the cathode ray tube.At this moment framework can be designed to the column framework, groove is arranged on the column, glass places groove, can design conductive clip in the groove, glass is clamped, keep contacting conducting with conducting film good, conductive clip is drawn outer the end with electrostatic leakage device A of column by lead and is connected, and the B of electrostatic leakage device (3) holds ground connection.Conductive clip in the column groove can be embedded in the groove when making column, keeps well contacting and conducting with conductive clip when guaranteeing in the glass insertion groove.Conductive clip is drawn outside the column frame by lead.Protecting screen is seated in the front of cathode ray tube, eliminates cathode ray tube emission high voltage electron beam and the high-voltage electrostatic field that produces.

Protector can directly be combined on the display of picture color television set one class, glass (1), framework (2) directly and the casing of the display of color television set and so on be combined into one framework and be positioned at picture tube anterior locations on the casing, framework (2) is a conductive frame, there is nesa coating coating on glass (1) surface, and glass (1) places in the conductive frame (2).Conductive frame (2) is to be positioned on the preceding panel of picture tube (panel can be a working of plastics) on the color television set machine shell panel.During injection moulding, at pre-buried conductive clip in conductive frame place or elastic conducting strip, elastic conducting strip or conductive clip contact to be connected with device glass conductive film layer in framework (2) and keep conducting, again by in the lead introducing machine.

Pre-buried conducting strip or conductive clip are introduced color television set machine shell panel inboard by lead.Electrostatic leakage device (3) places in the TV shell.The A of electrostatic leakage device end is connected with the lead of drawing of conductive frame, and B holds with zero potential contact on the color television set electric wiring terminal block and is connected.

Electrostatic leakage device (3) can be made into one, because volume is little, can be assembled in the attaching plug (Fig. 5) plug and can be and have only a pin (Fig. 5 a), plug also can have two (Fig. 5 B), also can be that three pins (Fig. 5 c) are arranged, plug has two, during three pins, electrostatic leakage device B end can be connected with arbitrary pin of plug, and all the other two plug pins are empty pin.During use, plug inserts in the supply socket.When attaching plug had only a pin, plug can insert in arbitrary jack of supply socket during use, promptly can insert the phase line hole, also can insert the center line hole, also can insert the ground wire hole.

Electrostatic leakage device (3) also can be assembled in the changeover plug, and (Fig. 4 a and 4b) changeover plug has pin (7) and jack (6), and jack is corresponding with pin to be connected conducting by lead.The B end of electrostatic leakage device (3) can be connected with arbitrary pin.During use, changeover plug inserts in the supply socket, and television plug inserts in the jack of changeover plug.Changeover plug also can connect control switch K(Fig. 4 a) to control the cut-out and the conducting of power supply.

Claims

1, a kind of protector for cathoda-ray tube, form by glass (1) framework (2) and electrostatic leakage device (3), there is nesa coating coating on glass (1) surface, it is characterized in that conductive film layer is defective metal oxide layer, framework (2) is a conductive frame, and glass places in the frame, the two-terminal device that electrostatic leakage device (3) is made up of arresting element (4) back in parallel with resistance R (5), one end is connected other end earth connection or zero line or phase-connecting wire with framework (2).

2, by the described protector for cathoda-ray tube of claim 1, it is characterized in that being embedded with in the conductive frame electric conductor, electric conductor contacts conducting with the conducting film of glass (1), and electric conductor is connected with lead again draws outside the framework.

3, by the described protector for cathoda-ray tube of claim 1, it is characterized in that electrostatic leakage device (3) is seated in the power connection, bleeder A end is connected with conductive frame by lead, and the B end is connected with any pin of plug.

4,, it is characterized in that electrostatic leakage device (3) is seated in the changeover plug by the described protector for cathoda-ray tube of claim 1.