KR100618322B1 - Partial type backlight apparatus - Google Patents

Abstract

The present invention relates to a backlight device for illuminating a work table at a probe station. Particularly, a split type backlight capable of performing segmental inspection on a flat panel display panel by dividing and controlling fluorescent lamps illuminating the work table can adjust luminance deviation. Relates to a device.

In the backlight device for illuminating a worktable of a probe station, a constituent means of the split backlight device of the present invention includes a backlight plate provided at a lower side of the worktable and having an inner accommodating space, and accommodated in the backlight plate. At least two lamps are formed as a group to form a divided area, and the divided areas are composed of at least two or more, and each light source unit for adjusting the brightness volume of each divided area is connected in series with each lamp included in the light source unit. A ballast unit which is connected to the ballast unit, an external controller provided outside the probe station to adjust the brightness volume and on / off of the lamp for each of the divided regions, a power supply unit for supplying power to the ballast unit; Switched according to the operation of the external controller to turn the light source on / off Including SSR which is characterized in that it is made.

Probe Station, Backlight

Description

Split backlight unit {PARTIAL TYPE BACKLIGHT APPARATUS}

1 is a schematic configuration diagram of a conventional backlight device included in a probe station.

2 is an overall block diagram of a conventional backlight device.

3 is a layout view of a fluorescent lamp of a conventional backlight device.

4 is a schematic diagram of a divided backlight device of the present invention included in a probe station.

5 is an overall block diagram of a split backlight device applied to the present invention.

6 is a layout view of a fluorescent lamp applied to the present invention.

The present invention relates to a backlight device for illuminating a work table at a probe station. Particularly, a split type backlight capable of performing segmental inspection on a flat panel display panel by dividing and controlling fluorescent lamps illuminating the work table can adjust luminance deviation. Relates to a device.

1 is a block diagram showing a backlight device included in a conventional probe station.

As shown in FIG. 1, the backlight device included in the conventional probe station 10 includes a work table 30 on which a work display 20 and a flat panel display panel are mounted. Probe station to control the backlight plate 40 and the fluorescent lamp (denoted 41 in FIG. 2) and the ventilation fan (denoted 43 in FIG. 3) provided between the backlight plate 40 and the backlight plate 40. 10 includes a controller 46 installed on the upper side, and a switch unit 48 connected to the controller 46 and the electric wire 72 to adjust the brightness volume and on / off of the fluorescent lamp 41. have.

The backlight plate 40 includes a plurality of fluorescent lamps (denoted as 41 in FIG. 2) in the accommodation space provided therein, and the fluorescent lamps (denoted 41 in FIG. 2) therein. And ballasts (labeled 42 in FIG. 3) connected to In addition, the controller 46 for controlling the ballast (denoted 42 in FIG. 3) and the fluorescent lamp (denoted 41 in FIG. 2) is connected to the ballast (denoted 42 in FIG. 3) by an electric line. The probe station 10 is installed on the upper side.

On the other hand, the switch unit 48 for adjusting the on / off and brightness volume of the fluorescent lamp (denoted 41 in Figure 2) is provided on the side of the probe station 10, the controller via the electric wire 72 It is connected with (46).

The controller 46 is connected to an electric line 73 through a plug 74 to receive power from an external power supply (not shown). In addition, the controller 46 is connected to the fluorescent lamp (denoted 41 in FIG. 2) and the ballast (labeled 42 in FIG. 3) and the like by an electric wire 71 to adjust on / off or brightness volume.

As shown in FIG. 2, the fluorescent lamps 41 provided in the backlight plate 40 are arranged in a row without a plurality of fluorescent lamps 41. In addition, the fluorescent lamps 41 are simultaneously turned on / off or the brightness volume is adjusted according to the operation of the switch unit 48.

3 is a block diagram illustrating the conventional backlight device.

As shown in FIG. 3, the conventional backlight device includes a fluorescent lamp 41 accommodated in the backlight plate 40, a ballast 42 connected in one-to-one correspondence with the fluorescent lamp 41, and the backlight plate. 40 is provided on the ventilation fan 43 for ventilating the air inside the probe station 10 and supplied with an external AC power source 47 to supply the rated power to the ballast 42 and the ventilation fan 43. The controller 46 and the switch unit 48 which is electrically connected to the controller 46 is provided on the side of the probe station 10 to adjust the on / off and brightness volume of the fluorescent lamp 41 Consists of including.

The controller 46 receives power from the external AC power 47 and converts the power to the power used by the ventilation fan 43 and the ballast 42. That is, the controller 46 also serves as a voltage level converter and a converter. In addition, the controller 46 serves to turn on / off the fluorescent lamps 41 or adjust the brightness volume according to the signal transmitted from the switch unit 48.

The controller 46 is connected to the ventilation fan 43 and the ballast 42 by a connection terminal 45. The ventilation fan 43 is installed at the side of the backlight plate 40 to ventilate the air and cool the generated heat. In addition, the ventilation fan 43 is provided with a light emitting diode 44 to emit the light emitting diode 44 during normal operation.

The ballast 42 is the same number as the fluorescent lamp 41 is used is accommodated in the backlight plate (40). The ballast 42 is connected in series with the fluorescent lamp 41 in one-to-one correspondence.

The plurality of ballasts 42 accommodated in the backlight plate 40 are connected by the same electrical wiring through the controller 46 and the connection terminal 45. Accordingly, when a specific signal (such as an on / off signal or a brightness volume signal) is transmitted from the controller 46 to the connection terminal 45, the plurality of ballasts 42 simultaneously receive the same signal and the fluorescent lamp 41 is received. To pass).

That is, when the switch unit 48 selects a signal (on / off signal or brightness volume signal), the controller 46 connects the ballast 42 to the ballast 42 connected to the same electric wiring through the connection terminal 45. Send a signal (on / off signal or brightness volume signal). Then, the fluorescent lamps 41 connected to the ballast 42 in a one-to-one manner may be simultaneously turned on / off or the brightness volume may be adjusted at the same time.

According to the conventional backlight device as described above, since the fluorescent lamp is collectively voltage-controlled by a controller installed at the upper side of the probe station, a flickering phenomenon in which the fluorescent lamp flickers may occur.

In addition, since the fluorescent lamp is voltage controlled by the controller, more flickering occurs when a low voltage is applied to the fluorescent lamp to be used for low luminance. Therefore, the filament of the fluorescent lamp is damaged and the problem of the lamp is frequently generated.

In addition, the length of the electrical wiring connecting the ballast and the controller is long, the problem that noise is more likely to occur.

In addition, since the fluorescent lamps are simultaneously turned on / off or adjusted to the same brightness volume, it is difficult to control the luminance deviation.

In addition, the weight of the entire backlight device including the controller is increased, the electrical wiring is used to increase the problem that takes a lot of effort and time to install or replace the backlight device.

In addition, according to the conventional backlight device, the controller includes components that function as transformers, converters, and ballasts of various kinds, so that the weight increases, and when the two or more fluorescent lamps are connected to one ballast, The size and number of controllers will increase. Therefore, since one fluorescent lamp must be connected to one ballast, the free space inside the backlight plate is insufficient, and due to the complicated internal space, the circulation of air by the ventilation fan is not smooth and the brightness may be reduced. have.

In addition, since the fluorescent lamps are simultaneously turned on and off and have the same brightness volume, a divisional inspection of the flat panel display panel is impossible, and a problem of not being able to perform a concentrated inspection on a specific portion of the flat panel display panel occurs.

The present invention was devised to solve the above problems of the prior art, and by dividing the fluorescent lamps into at least two areas and controlling the fluorescent lamps included in each of the divided areas, segmentation inspection is possible. It is an object of the present invention to provide a split type backlight device capable of preventing the phenomenon of frickering and being turned off by the use of low brightness by adjusting the on / off or brightness volume of the fluorescent lamp by current control.

In order to solve the technical problem as described above, the constituent means of the divisional backlight device of the present invention is a backlight device for illuminating a work table of a probe station, the backlight being provided at a lower side of the work table but having an inner accommodation space. And a light source unit configured to form a divided area using at least two lamps as a group to be accommodated in the backlight plate, wherein the divided areas are constituted by at least two, and the brightness volume is adjusted for each divided area, and the light source unit A ballast unit connected in series with each lamp included in the lamp, an external controller connected to the ballast unit and provided outside the probe station to adjust the brightness volume and on / off of the lamp for each partition, and the stabilizer Power supply unit for supplying power to the base, and the external control It is switched in response to the operation of multiple characterized by consisting of the SSR including turning on / off the light source.

In addition, the fan is formed on the side of the backlight plate, it is characterized in that it is further provided with a ventilation fan consisting of a plurality of fans to cool the heat generated inside the backlight plate by receiving power from the power supply. In addition, the ventilation fan unit preferably includes a light emitting diode indicating whether the respective fans operate normally.

In addition, between the power supply unit and the ventilation fan unit is characterized in that the SMPS for operating a plurality of fans and light emitting diodes by converting AC power to DC rated power.

In addition, the ballast is characterized in that connected to one of the two lamps included in the light source. That is, two lamps may be connected to one ballast to reduce the number of ballasts in half.

The external controller may further include an on / off switch for turning on / off the ventilation fan unit and the light source unit, a main luminance control unit for simultaneously controlling the brightness of all lamps of the light source unit, and selecting each divided area of the light source unit. And a fine brightness control unit for finely controlling the brightness of the lamps of the selected divided region.

Hereinafter, with reference to the accompanying drawings will be described in detail the operation and preferred embodiment of the present invention, the split type backlight device consisting of the above configuration means.

4 is a block diagram showing a divided backlight device of the present invention included in the probe station.

As shown in FIG. 4, the present invention includes a divided backlight device included in the probe station 10, which includes a work table on which a work display 20 and a flat panel display panel are mounted. 30 controls the backlight plate 105 and the light source unit (indicated as 110 in FIG. 5) and the ventilation fan unit (indicated as 130 in FIG. 5) provided in the backlight plate 105. In order to control the volume of the brightness and the brightness), the probe station 10 includes an external controller 190 installed on the outer side.

The backlight plate 105 includes a light source unit (indicated by 110 in FIG. 5) including a plurality of lamps (indicated by 111 in FIG. 5) and a plurality of lamps (for example, 24 lamps) provided therein. A ballast portion (denoted 120 in FIG. 5) is comprised of a plurality of ballasts (denoted 121 in FIG. 5) connected to a light source portion (denoted 110 in FIG. 5). In addition, the external controller 190 for controlling the ballast portion (denoted 120 in FIG. 5) and the light source portion (denoted 110 in FIG. 5) is the ballast portion (denoted 120 in FIG. 5) and the light source portion ( In FIG. 5, the probe station 10 is installed at an outer side of the probe station 10 in a state of being connected to the electric wire 71.

Meanwhile, the light source unit (indicated as 110 in FIG. 5), the ballast unit (indicated as 120 in FIG. 5), and the ventilation fan unit (indicated as 130 in FIG. 5) accommodated in the backlight plate 105 supply power. It is connected to the electric cable 72 through the plug 74 to receive.

5 is a block diagram of the divided backlight device 200 according to the present invention.

As shown in FIG. 5, the split type backlight device 200 according to the present invention includes a backlight plate 105 provided on a work stage, a light source unit 110 provided in an accommodation space inside the backlight plate 105, and A ballast unit 120 connected in series with the light source unit 110, an SSR 140 for turning on / off the power supply of the external power supply unit 170 to the ballast unit 120 and the light source unit 110; It includes an external controller 190 connected to the ballast 120 and the electrical wiring to turn on / off the lamps 111 of the light source 110 or adjust the brightness volume.

In addition, the ventilation fan unit 130 is further provided to receive power from the power supply unit 170 to ventilate the inside of the backlight plate 105. In addition, between the external power supply unit 170 and the ventilation fan unit 130 receives the AC power is converted into DC rated power (12V power) to supply the SMPS 150 to the rated power supply to the ventilation fan 130 It can be arranged further.

The backlight plate 105 is provided between the work stage and the work table but has an accommodation space therein. The interior accommodation space accommodates various components for illuminating the worktable of the probe station on which the flat panel display panel is placed.

The light source unit 110, the stabilizer unit 120, the ventilation fan unit 130, the SMPS 150, and the SSR 140 are accommodated in the accommodation space inside the backlight plate 105.

The light source unit 110 includes a plurality of lamps 111, and at least two or more lamps 111 form a divided region as a group. The divided area including the two or more lamps 111 is composed of at least two, and the divided areas are adjusted in brightness volume separately from other divided areas.

The lamp 111 constituting the light source unit 110 emits light by discharge in low pressure mercury vapor. That is, as a general property of a discharge lamp, when a current flows, a voltage required for discharge drops, so that a constant voltage is applied to cause discharge.

As shown in FIG. 6, 24 lamps 111 form the light source unit 110, and six lamps 111 are grouped into four groups (areas A, B, C, and D). Area). Since the divided regions A, B, C, and D may be individually controlled, the brightness volume may be adjusted for each divided region.

Each lamp 111 constituting the light source unit 110 is connected to the ballast unit 120 in series. Each ballast 121 constituting the ballast portion 120 is preferably connected in series with the two lamps (111). Therefore, as shown in FIG. 6, the ballast 120 connected to the light source 110 composed of 24 lamps 111 includes twelve ballasts 121.

The ballast 120 prevents excessive current from flowing into the light source 110 to prevent the light source 110 from being destroyed. That is, when a constant voltage is applied to discharge the lamps 111 of the light source unit 110, since the current may be excessively increased and the lamp 111 may be destroyed, the current is increased by connecting the ballasts 121 in series. Prevent it. The ballast 121 of the ballast part 120 may be composed of a metal resistance in principle, but uses a choke coil that generates little heat because it generates heat by electric current.

The side of the backlight plate 105 is composed of a plurality of fans 131 to cool the heat generated from the ballast portion 120 and the light source unit 110, and ventilate the air in the accommodation space inside the backlight plate 105 Ventilation fan 130 is provided.

The ventilation fan unit 130 is further provided with a light emitting diode 133 to inform the operation of the fans 131. That is, the light emitting diode 133 is provided to emit light when the fans 131 operate normally. Each fan 131 and the light emitting diode 133 included in the ventilation fan unit 130 operate by a stable DC rated power source.

Therefore, a front end of the ventilation fan 130 is provided with a switching mode power supply (SMPS) 150 for converting and supplying AC power supplied from an external power supply unit 170 to DC rated power. Will be.

The SMPS 150 is a modular power supply device for converting AC power supplied from the outside to match the ventilation fan 130. In addition, the semiconductor switching characteristics are used to control interruptions at high frequencies above commercial frequencies and to mitigate shocks. By type of power supply, AC / DC converter converts AC power supplied by 110V or 220V to 5 ~ 48V DC and DC / DC converter converts it to 3.3 ~ 48V DC again.

That is, the SMPS 150 is supplied with AC power of 220V from the external power supply unit 170 supplying power to the ballast 120 and the ventilation fan 130, stable DC to be used in the ventilation fan 130. The fan 131 and the light emitting diode 133 are operated by converting and supplying the same to the rated power.

The light source unit 110 connected to the ballast unit 120 in series is operated by a 220V AC power supplied from the external power supply unit 170. Therefore, the ballast 120 connected in series with the light source 110 is connected to the external power supply 170 by the connection terminal 160.

Meanwhile, an SSR (Solid State Relay) 140 is provided in an electrical line between the connection terminal 160 and the ballast 120 connected in series with the light source 110. The power supply may be interrupted by the light source 110 connected to the light source 110 in series.

The SSR 140 performs an ON / OFF function instead of phase control in a form of electronically replacing a mechanical relay. It also prevents rapid current flow, extending the life of connected components and removing noise.

Accordingly, when power is applied from the external power supply unit 170 through the connection terminal 160, the SSR 140 is turned on by a switching operation to serially supply the supplied power with the light source unit 110. Transfer to the ballast unit 120 is connected to. In addition, the SSR 140 is switched and turned off according to an operation of the external controller 190 to be described later to cut off power transmitted to the ballast 120 connected in series with the light source 110. The light source unit 110 may be turned off.

In addition, the SSR 140 is turned off by itself when an abnormality occurs in the ballast 120 or the ventilation fan 130, the circuit component (stabilizer 120, ventilation fan 130, light source) (110), etc.) to prevent destruction.

The role of turning on / off the light source unit 110 or adjusting the brightness volume which is connected in series with the ballast unit 120 is performed by an external controller 190 installed outside the probe station. Therefore, the external controller 190 is connected to the ballasts 121 of the ballast unit 120 through the connection terminal 180.

The external controller 190 turns on / off the light source unit 110 and the ventilation fan unit 130 by an operator, or simultaneously adjusts the brightness of the lamps 111 included in the light source unit 110 or the light source unit ( It is installed outside the probe station in order to locally fine-tune the brightness of only the lamp 111 in the specific partition included in 110.

The external controller 190 is composed of various switches and controllers. That is, the main brightness control unit for simultaneously controlling the brightness of the on / off switch 191 for turning on / off the ventilation fan unit 130 and the light source unit 110 and the lamps 111 included in the light source unit 110. 192, a selection switch 193 for selecting respective divisions of the light source unit 110, and a fine luminance control unit 194 for finely controlling the luminance of the lamps 111 of the selected divisions. do.

Therefore, when power is applied from the external power supply unit 170 to the ballast unit 120 connected in series to the ventilation fan unit 130 and the light source unit 110, the operator operates the on / off switch 191 (Operation in the ON state) The ventilation fan 130 and the light source 110 is operated. Then, the fan 131 of the ventilation fan unit 130 rotates and the light emitting diode 133 emits light, and all lamps 111 included in the light source unit 110 illuminate with constant luminance.

Next, the operator rotates the main brightness control unit 192 to adjust the lamps 111 included in the light source unit 110 to emit light as much as a desired candela.

In the above state, the light source unit 110 may generate luminance deviation for each region. In this case, the luminance of the lamps 111 of the divided region included in the region to compensate for the luminance deviation should be adjusted separately.

Accordingly, a fine brightness control unit (300) is selected to select a divided area including a region to which the luminance deviation is to be compensated by the selection switch 193 and to finely adjust the brightness of the lamps 111 included in the selected divided area. 194) to compensate for the desired luminance deviation.

In this way, by dividing the light source unit 110 into regions so that the luminance can be finely adjusted for each divided region, the luminance deviation generated when the flat panel display panel is inspected can be adjusted and the specific portion can be concentratedly inspected.

That is, when the partial region A shown in FIG. 5 or FIG. 6 is to be intensively inspected, the luminance of the divided region B, the segment C, and the segment D is reduced, and when the concentrated region B is to be intensively inspected. To reduce the luminance of the partition A, the partition C, and the partition D, and to concentrate the inspection of the partition C, the brightness of the partition A, the partition B, and the partition D is reduced, and the partition D In the case where the part is to be concentrated-inspected, the specific part may be inspected by an operation of decreasing the luminance of the part A, the part B, and the part C.

According to the present invention, the split type backlight device having the above-described configuration, operation, and preferred embodiments reduces flickering due to current control of the ventilation fan unit, the ballast unit, and the light source unit using SMPS and SSR. It can be effective.

In addition, the present invention generates less frickering even when the fluorescent lamps are used at low brightness by using the current control as described above. Therefore, the filament of the lamp is not damaged, there is an advantage that can prevent the phenomenon that the lamp out (out).

In addition, the length of the electrical wiring used is short, there is an advantage that the noise is reduced and the complexity of the wiring is reduced.

In addition, since the light source unit is divided and controlled for each area, the divided display of the flat panel display panel can be performed, and the luminance deviation can be adjusted.

In addition, since the conventional external controller functions are all accommodated inside the backlight plate, the device is simplified, weight is reduced, and space efficiency is increased.

In addition, since the overall structure of the device is simplified, the time and effort used for A / S and equipment parts replacement are significantly reduced.

In addition, since one ballast is connected to two fluorescent lamps, the number of ballasts used is reduced by half, thereby providing an advantage in using space inside the backlight plate.

As described above, the present invention is described as an embodiment with reference to the drawings, which is an exemplary description of only one embodiment. Therefore, the present invention is not limited to one embodiment as described above, it will be included to various modifications and equivalents that can be carried out by anyone of ordinary skill in the art within the scope without departing from the gist of the present invention.

Claims (7)

In the backlight device for illuminating the worktable of the probe station, A backlight plate provided at a lower side of the work table and having an inner accommodation space; A light source unit accommodated in the backlight plate to form a divided area using at least one lamp as a group, wherein the divided area is composed of at least two, and the brightness volume of each divided area is adjusted; A ballast unit electrically connected to each lamp included in the light source unit; An on / off switch provided outside the probe station for controlling the brightness volume and on / off of the lamp for each of the divided regions and connected to the ballast, and the brightness of all lamps of the light source; An external controller including a main brightness control unit for simultaneously controlling the light source, a selection switch for selecting respective partitions of the light source unit, and a fine brightness control unit for finely adjusting the brightness of the lamps of the selected partitions; And Split type backlight device characterized in that it comprises a power supply for supplying power to the ballast. The method according to claim 1, And a ventilation fan unit formed on a side of the backlight plate and configured to receive a power from the power supply unit to cool heat generated in the backlight plate and ventilate air. The method according to claim 2, The ventilation fan unit includes a light emitting diode for informing whether or not the normal operation of each fan comprises a split type backlight device. The method according to claim 3, And a SMPS between the power supply unit and the ventilation fan unit to convert AC power into DC rated power to operate the plurality of fans and the light emitting diodes of the ventilation fan unit. The method according to claim 1, The ballast unit is connected in series with each of the lamps included in the light source unit, split type backlight device, characterized in that connected to at least two lamps one by one. delete The method according to claim 1, And a SSR which is switched according to an operation of the external controller to turn on / off the light source unit.

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