JPH0332104Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention will be explained in the following order.

A. Field of industrial application B. Overview of the invention C. Conventional technology D. Problem to be solved by the invention E. Means for solving the problem F. Effect G. Example G-1 Overall configuration and illumination means for liquid crystal display section Arrangement (Fig. 1, Fig. 2, Fig. 3) G-2 Operation (Fig. 1) H Effect of the invention A Industrial application field The present invention is equipped with a timer control section with a timer, and receives channel selection. The present invention relates to a tuner device equipped with a liquid crystal display section for displaying and displaying time.

B. Summary of the invention The present invention provides a tuner device that is equipped with a timer control section that includes a timer, and is provided with a liquid crystal display section that displays at least a channel selection reception display and a time display related to the timer control section. A main lighting means and a sub-lighting means that consumes less power than the main lighting means are arranged, and the main lighting means is operated when the channel is in the channel selection reception operation state and when the timer control setting is made in the timer control section. By setting the sub-lighting means to the operating state and setting the main lighting means to the non-operating state at other times, the liquid crystal display can be turned on even when the channel selection reception is not in the operating state. The display section can be placed in a clear visible display state, and furthermore, it is possible to suppress an increase in power consumption and to extend the life of the main illumination means.

C. Prior Art A tuner device has been proposed that incorporates a timer control unit with a timer and has a program selection function. In such a tuner device, whether the receiving station is an FM station or an AM station is
Various displays are made, including identification of the station, reception frequency display, setting time display for channel selection programming, etc., and these various displays are relatively easy to perform by using a liquid crystal display panel. . When a liquid crystal display panel is used as a display means in a tuner device, in order to make the display contents clear, usually
The liquid crystal display panel is illuminated by illumination lamps, ie, back lamps, arranged on the back side of the liquid crystal display panel.

In such a tuner device that is equipped with a timer control unit with a timer and a liquid crystal display panel, the liquid crystal display panel displays an identification display indicating whether it is an FM station or an AM station as described above. In addition to the channel selection reception display including reception frequency display, or the setting time display related to the timer control section, time is displayed based on the timer associated with the timer control section. In such a case, the time display may indicate, for example, when the tuner device is not in the tuning reception operation state or the tuning programming operation state.
It is required to be in a clear visible state at all times, and in order to meet this requirement, the back lamp that illuminates the liquid crystal display panel must be lit continuously at all times.

D Problems to be solved by the invention However, as mentioned above, if the backlight lamp that illuminates the liquid crystal display panel in the tuner device is left on all the time, power consumption will increase and the lifespan of the backlight lamp will be shortened. There is an inconvenience that it is shortened. Furthermore, the liquid crystal display panel that displays the time at night becomes excessively bright, which may disturb people's sleep.

In view of these points, the present invention is provided with a timer control unit including a timer, and a liquid crystal display unit that displays a channel selection reception display and a time display related to the timer control unit when illuminated by the lighting means. The LCD display is clearly visible even when it is not in the channel selection reception operation state.
Moreover, it is an object of the present invention to provide a tuner device that has appropriate brightness, suppresses an increase in power consumption, and extends the life of the illumination means.

E. Means for Solving the Problems In order to achieve the above-mentioned object, the tuner device according to the present invention not only controls the operation of the tuning reception circuit section and the tuning reception circuit section, but also includes a timer and other related functions. a control circuit section including a timer control section that performs various controls; a liquid crystal display section that receives display control signals from the control circuit section and displays at least a channel selection reception display and a time display; When the lighting means and the sub-lighting means which consume less power than the lighting means and the lighting control signal from the control circuit section are placed in the operating state and the timer control setting is made in the control circuit section. an illumination control circuit section that puts the main illumination means into an operating state and puts the sub-illumination means into an inoperative state when the main lighting means is in an operating state, and puts the sub-illumination means into an operating state and puts the main lighting means into an inoperable state at other times. It consists of

F Effect In the tuner device according to the present invention configured as described above, the liquid crystal display section has a main illumination means that provides illumination with high brightness, and a main illumination means that consumes less power than the main illumination means and provides relatively low brightness. It shall be illuminated by either the sub-illumination means that performs illumination. These main and sub-illumination means are each controlled by a lighting control circuit unit, and for example, the control circuit unit controls the operation of the channel selection reception circuit unit, and the timer control unit performs a channel selection reception display and a set time according to the time setting operation of the timer control unit. When the display is displayed and clarity on the liquid crystal display is particularly required, when the channel selection/reception circuit is put into operation and when the timer control settings are made in the control circuit, the liquid crystal display is used as the main illumination means. For example, when the liquid crystal display section displays the time based on a timer associated with the timer control section, and at other times, the liquid crystal display section is illuminated by the sub-illumination means. A state of illumination is assumed.

Therefore, in the liquid crystal display section, when the channel selection reception circuit section is put into operation and when the timer control setting is made in the control circuit section, the liquid crystal display section is displayed with sufficient brightness and extremely clear light under illumination by the main lighting means. At the same time, other times,
Under constant illumination by the auxiliary illumination means, a moderately bright display can be obtained with reduced power consumption. Furthermore, since the main illumination means is not always in operation, its lifespan is extended.

G Embodiment G-1 Overall configuration and arrangement of illumination means with respect to the liquid crystal display section (FIGS. 1, 2, and 3) FIG. 1 shows a main part of an example of a tuner device according to the present invention. This example includes a channel selection reception circuit section 11 that performs channel selection and reception operations, a liquid crystal display section 12 equipped with a liquid crystal display panel, and a timer control section with a timer, and controls the operation of the channel selection reception circuit section 11. and a channel selection control/timer control circuit section 13 that controls the operation of the liquid crystal display section 12. In the channel selection control/timer control circuit section 13, direct channel selection operations, channel selection programming operations performed in connection with the timer control section, etc. are performed. A channel selection control signal obtained via the timer control section based on the operation is supplied in the form of channel selection data Dt from the channel selection control/timer control circuit section 13 to the channel selection reception circuit section 11. Tuning reception circuit section 1
1, when such channel selection data Dt is supplied,
A corresponding channel selection operation is performed, and a reception operation is performed to receive a signal from the selected station.

In addition, in the channel selection control/timer control circuit section 13, a display control signal is formed based on a direct channel selection operation, a channel selection programming operation, or a timer associated with a timer control section, and this is the display data Dd. The image data is supplied to the liquid crystal display section 12 in this manner. In the liquid crystal display section 12, based on the display data Dd, the liquid crystal display panel displays, for example, whether the receiving station is an FM station or an AM station (display classification) when the channel selection receiving circuit section 11 is in an operating state. 12a) and reception frequency display (display category 12b)
The setting time display (display section 12b), the designated station (PRESET
STATION) display (display category 12c) and display of whether the data regarding the set time and designated station are stored in memory 1 or 2 built into the timer control unit, and the operation based on the storage is performed only once. A display (display category 12d) indicating that the program is for the purpose of The time is displayed (display sections 12a and 12b) with distinction between morning and afternoon based on the timer associated with the timer control section.

The channel selection control/timer control circuit section 13 is connected to the standby power supply +B' and is always in an operable state, and the timer included in the timer control section is always operating. Further, the liquid crystal display section 12 is also kept in an operating state at all times with an appropriate power supply, so that the time display on the liquid crystal display section 12 is displayed when the channel selection receiving circuit section 11 is in an operating state and when the channel selection receiving circuit section 11 is in an operating state. This is done at all times except when timer control settings are made during station programming operations. On the other hand, the channel selection reception circuit section 11 is connected to the main power supply +B via the switch 21a in the relay 21,
Coil 2 in relay 21 as described below.
When a current is applied to the switch 1b and the switch 21a is turned on, it is activated.

A lamp 23 forming the main illumination means for the liquid crystal display section 12 is connected to the main power supply +B via a switch 22a in the relay 22, and a PNP transistor 24 is connected to the main power supply +B'.
Two light emitting diodes 26 forming auxiliary illumination means for the liquid crystal display section 12 are connected in series via a collector-emitter path and a current limiting resistor 25. The lamp 23 is a back lamp that illuminates the liquid crystal display panel of the liquid crystal display section 12 from the back side, and also has two light emitting diodes 26.
It is also said that the liquid crystal display panel is illuminated from the back. Note that the power consumption of the two light emitting diodes 26 during operation is extremely small compared to the power consumption during operation of the lamp 23.

An example of a specific arrangement relationship between the liquid crystal display panel provided in the liquid crystal display section 12, the lamp 23, and the two light emitting diodes 26 is shown in FIGS. 2 and 3, for example.
It shall be as shown in the figure.

In this example, the printed wiring board 40 includes
A liquid crystal display panel 41 included in the liquid crystal display section 12 is installed at one end thereof, and a light-transmitting acrylic plate 42 and a light-scattering plate 4 are provided on the back side thereof.
3 are sequentially erected, and these liquid crystal display panels 41,
A housing member 44 is attached to the rear side of the light-transmitting acrylic plate 42 and the light-scattering plate 43, and an illumination space is formed behind the light-scattering plate 43. The inner surface of the housing member 44 is a light reflecting surface. A lamp 23 is attached to a position within the illumination space of the printed wiring board 40, and two light emitting diodes 26 are embedded in each end face of the light-transmitting acrylic plate 42.

With this configuration, when the lamp 23 is turned on, the light from the lamp 23 is reflected directly and on the inner surface of the housing member 44, enters the light scattering plate 43, and is scattered by the light scattering plate 43. The light from the lamp 23 illuminates the liquid crystal display panel 41 from the back side. The light scattering plate 43 is the liquid crystal display panel 4
It plays the role of forming a surface light source for 1.

In this way, when the lamp 23 is turned on, the liquid crystal display panel 41 is illuminated with sufficient brightness.

On the other hand, when the two light-emitting diodes 26 are turned on, the light from each light-emitting diode 26 enters the light-transmitting acrylic plate 42 from both end surfaces thereof, and the light-transmitting acrylic plate 42 illuminates the back surface of the liquid crystal display panel 41. There will be lighting from. Therefore, two light emitting diodes 26
is lit, the liquid crystal display panel 41
Although the brightness is not as bright as when the lamp 23 is turned on, it is illuminated with appropriate brightness.

A bias voltage obtained by dividing the voltage of the standby power supply +B' by resistors 27 and 28 is applied to the base of the PNP transistor 24 connected to the standby power supply +B'. switch 22a and lamp 2 connected to
3 is connected via a diode 29. The coil 22b in the relay 22 is
One end of it is connected to the standing power supply +B′, and
The other end is grounded via a current limiting resistor 30 and a collector-emitter path of an NPN transistor 31. The base of the NPN transistor 31 is connected to the channel selection control/timer control circuit section 13.
A lighting control signal obtained when a timer control setting is made in a tuning programming operation from
It is assumed that Si will be supplied. These, relay 22, PNP transistor 24, resistor 25, 2
7, 28, and 30, the diode 29, the NPN transistor 31, and the like form a lighting control circuit section that controls the operation of the lamp 23 and the light emitting diode 26.

Furthermore, the coil 21 in the relay 21 described above
b has one end connected to the standby power supply +B', and the other end connected to the current limiting resistor 32 and
It is grounded through the collector emitter passage of the NPN transistor 33. The base of the NPN transistor 33 is connected to the channel selection control/timer control circuit section 13, and receives a signal from the channel selection control/timer control circuit section 13 when the channel selection reception circuit section 11 is put into operation. The resulting power supply control signal
It is assumed that Su will be supplied.

G-2 Operation (Fig. 1) In an example of the tuner device according to the present invention configured as described above, when the tuning reception circuit section 11 is put into the operating state, the tuning control/timer control circuit Tuning data Dt obtained through the timer control section based on the direct tuning operation performed in the tuning section 13 or based on the tuning programming operation is supplied to the tuning receiving circuit section 11, and the tuning control section 11 receives the tuning data Dt. /A power supply control signal Su is supplied from the timer control circuit section 13 to the base of the NPN transistor 33. As a result, the NPN transistor 33 is turned on, and the coil 2 of the relay 21 is turned on.
Current from the standby power supply +B' flows through 1b.
As a result, the switch 21a of the relay 21 is turned on, and the voltage from the main power supply +B is applied to the tuning receiving circuit section 11, so that the tuning receiving circuit section 11 is put into operation. Then, the channel selection reception circuit section 11
A channel selection operation is performed according to the channel selection data Dt, and a reception operation is performed to receive a signal from the selected station.

In addition to this, display data is generated from the channel selection control/timer control circuit section 13 based on direct channel selection operations and channel selection programming operations.
Dd is supplied to the liquid crystal display section 12, and the liquid crystal display section 1
Based on the display data Dd, the liquid crystal display panel 41 provided in the channel selection receiving circuit 11 displays whether the receiving station selected by the channel selection receiving circuit section 11 is an FM station or an AM station, and a receiving frequency display after selection. Station reception display is performed.

Furthermore, at this time, the lighting control signal Si is sent out from the tuning control/timer control circuit section 13 in synchronization with the power supply control signal Su, and the NPN transistor 3
1 base. The NPN transistor 31 is turned on by this lighting control signal Si,
Standby power supply + through coil 22b of relay 22
A current flows from B', and switch 22a of relay 22 is turned on. As a result, the mains +
A voltage from B is applied to the lamp 23 via the switch 22a of the relay 22, and the lamp 23 is turned on. At the same time, voltage from the main power supply +B is supplied to the base of the PNP transistor 24 via the switch 22a of the relay 22 and the diode 29. As a result, the base potential of the PNP transistor 24 increases, the PNP transistor 24 is turned off, and no current flows through the light emitting diode 26.

Therefore, in this case, the lamp 23 is turned on and the light emitting diode 26 is turned off, so that the liquid crystal display panel 41 that displays the channel selection reception in the liquid crystal display section 12 is illuminated with sufficient brightness by the lamp 23. It is illuminated with a bright light, giving an extremely clear indication of the station selection reception.

Next, when the timer control settings are made in the channel selection programming operation in the channel selection control/timer control circuit section 13, the display data Dd formed accordingly is sent from the channel selection control/timer control circuit section 13 to the liquid crystal display section. 12 and is supplied to the liquid crystal display panel 41 provided in the liquid crystal display section 12,
The set time and designated station are displayed based on the display data Dd.

In this case, the power supply control signal Su is supplied from the channel selection control/timer control circuit section 13 to the base of the NPN transistor 33, and the power supply control signal Su is not supplied to the base of the NPN transistor 33. In other words, the channel selection reception circuit section 11 is in operation. It is assumed that it can be placed in either the active state or the inactive state. On the other hand, the lighting control signal Si from the tuning control/timer control circuit section 13 is always sent out.
It is supplied to the base of the NPN transistor 31.
As a result, the NPN transistor 31 is turned on, current from the standby power supply +B' flows through the coil 22b of the relay 22, and the switch 22a of the relay 22 is turned on, as described above.
The lamp 23 is turned on and the light emitting diode 26 is turned off. Therefore, in this case as well, the liquid crystal display panel 41 that displays the set time, designated station, etc. on the liquid crystal display section 12 is illuminated with sufficient brightness by the lamp 23.
The set time and designated station are displayed very clearly.

Furthermore, at times other than when the channel selection receiving circuit section 11 is brought into operation and when timer control settings are made in the channel selection programming operation in the channel selection control/timer control circuit section 13, the channel selection control/timer control circuit section Display data Dd formed based on the timer associated with the timer control unit included in 13 is supplied to the liquid crystal display unit 12.
Liquid crystal display panel 41 provided in liquid crystal display section 12
Then, the time is displayed with a distinction between morning and afternoon based on the display data Dd.

In this case, neither the power supply control signal Su nor the lighting control signal Si is sent from the channel selection control/timer control circuit section 13, so that both the NPN transistor 31 and the NPN transistor 33 are turned off. , no current flows in the coil 21b of the relay 21 or the coil 22b of the relay 22,
Both the switch 21a of the relay 21 and the switch 22a of the relay 22 are turned off. As a result, the voltage from the main power supply +B is not applied to the lamp 23, and the lamp 23 is turned off. Further, the voltage from the main power supply +B is not supplied to the base of the PNP transistor 24, and the PNP transistor 24 is connected to the resistors 27 and 2 that are applied to its base.
It is turned on by a bias voltage of 8. Therefore, the two light emitting diodes 26,
A current from the standby power supply +B' flows through the PNP transistor 24 and the resistor 25, and the light emitting diodes 26 are turned on. Furthermore, at this time,
Due to the presence of diode 29, the voltage available at the base of PNP transistor 24 is not applied to lamp 23.

Therefore, in this case, the lamp 23 is turned off and the light emitting diode 26 is turned on, and the liquid crystal display panel 41 that displays the time signal in the liquid crystal display section 12 is controlled to have an appropriate brightness by the light emitting diode 26. With this, a state of continuous illumination can be obtained. Since the power consumption in the operating state of the light emitting diode 26 is extremely small compared to the power consumption in the operating state of the lamp 23, the power consumption in such a case is equal to that when the lamp 23 is kept in a continuously lit state. Compared to this, it is significantly reduced.

In addition, in this way, when the channel selection receiving circuit section 11 is in the operating state and when the timer control setting is performed in the channel selection programming operation in the channel selection control/timer control circuit section 13, the liquid crystal display The lamp 23 illuminates the liquid crystal display panel 41 that displays the time at 12.
Since the light emitting diode 26 is used instead of the light emitting diode 26, the life of the lamp 23 is extended.

H. Effects of the invention As is clear from the above explanation, according to the tuner device according to the present invention, clarity is particularly required in the liquid crystal display section that displays the channel selection reception display and the time display related to the timer control section. When the channel selection/reception circuit section is put into operation and when the timer control settings are made, an extremely clear display with sufficient brightness is obtained on the liquid crystal display section under illumination by the main illumination means. For example,
At other times when the time is displayed based on the timer associated with the timer control section, the liquid crystal display section is always illuminated with moderate brightness by a sub-lighting means that consumes less power than the main lighting means. A high-quality display can be obtained with reduced power consumption.

Furthermore, the main illumination means can be configured so that it is not always in operation, and its lifespan can be extended.

Furthermore, when the main illumination means is put into the operating state, the sub-illumination means is put into the non-operation state, so that the liquid crystal display section can distinguish between the light from the main illumination means and the light from the sub-illumination means. By mixing,
The advantage is that the risk of being illuminated with undesirable colored light is avoided.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing an example of a tuner device according to the present invention, and FIGS. 2 and 3 are partial cross-sections showing an example of the arrangement relationship of the illumination means with respect to the liquid crystal display section in the example shown in FIG. 1. FIG. 2 is a side view and a plan view including FIG. In the figure, 11 is a channel selection reception circuit section, 12 is a liquid crystal display section, 13 is a channel selection control/timer control circuit section, 21
and 22 are relays, 24, 31 and 33 are transistors, 23 is a lamp, and 26 is a light emitting diode.

Claims (1)

[Claims for Utility Model Registration] A channel selection reception circuit section, a control circuit section including a timer control section that controls the operation of the channel selection reception circuit section and is equipped with a timer, and a display control signal from the control circuit section. a liquid crystal display section that displays at least a channel selection reception and a time display based on the reception; a main illumination means that illuminates the liquid crystal display section, and a sub-illumination means that consumes less power than the main illumination means; and the control circuit section. After receiving the lighting control signal from
When the channel selection/receiving circuit section is put into an operating state and when the timer control setting is made in the control circuit section, the main lighting means is put into an operating state and the sub-illuminating means is put into a non-operating state. a tuner device comprising: a lighting control circuit section that, when the sub-illumination means is activated, and the main illumination means is deactivated;