JPH0648433B2 - Television receiver - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel television receiver, and more particularly to a television receiver capable of being in a composite signal reproduction state or an RGB signal reproduction state. It is an object of the present invention to provide a new television receiver which does not require an operation of re-adjusting an image such as contrast when switching the reproduction state.

2. Description of the Related Art A television receiver is provided with a composite signal reproduction state by a switching operation, that is, a state in which a video signal received by an internal tuner is reproduced, or an RGB signal reproduction state,
That is, there are many things that can be brought into a state of reproducing RGB signals from an external device. And R
Many external devices that are sources of GB signals are built-in devices in a computer, and the signals input to the television receiver as RGB signals are generally digital signals that have only two values, "1" or "0".

By the way, in such a television receiver, it is necessary to change the contrast and the brightness when reproducing a composite signal and when reproducing an RGB signal. This is because even if the contrast is adjusted so that a preferable image can be obtained in the composite signal reproducing state, if the RGB signal is reproduced with the contrast adjustment amount being left as it is, the RGB signal has only binary values of "1" and "0". The contrast is apparently stronger. As a result, the eyes become tired and glare occurs in the image. Therefore, in general, the user weakens the contrast of the television receiver when switching to the RGB signal reproducing state, or weakens the contrast and the brightness by adjusting the RGB signal dedicated contrast adjuster and bright adjuster on the monitor side. It was However, it is necessary to perform the contrast adjustment operation every time the reproduction state is switched between the composite signal reproduction state and the RGB signal reproduction state, which means that the operability of the television receiver is deteriorated, and for the user. It's annoying.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention Therefore, according to the present invention, in a television receiver which can be in a composite signal reproduction state or an RGB signal reproduction state, an adjustment relating to an image such as contrast can be performed along with the switching of the reproduction state. It is intended to solve the conventional problem of having to perform a re-operation.

Means for Solving Problems The means adopted by the present invention for solving the above problems is a memory for storing a composite signal reproduction adjustment amount and an RGB signal reproduction adjustment amount for at least one adjustment target relating to an image. When the adjustment operation for switching the adjustment amount of the adjustment target is performed, if the time when the adjustment operation is performed is the composite signal reproduction, Similarly, if the stored value is the RGB signal reproduction time when the adjustment operation is performed, the storage value of the RGB signal reproduction adjustment amount of the storage means is switched according to the adjustment operation content, and the reproduction state is set. When the composite signal is reproduced, the stored value of the composite signal reproduction adjustment amount is read from the storage means and the RGB signal is read. When the reproduction state is reached, the stored value of the RGB signal reproduction adjustment amount is read from the storage means, and the adjustment amount of the adjustment target is adjusted according to the read storage value. Is.

According to the present invention, the adjustment amount for reproducing the composite signal and the adjustment amount for reproducing the RGB signal are separately stored for at least one adjustment target, and the composite signal reproduction is performed when the composite signal reproduction state is switched to. When the RGB signal playback state is switched according to the stored adjustment amount value for adjustment, the adjustment amount for the adjustment target is controlled according to the stored value for RGB signal playback. The operability is improved without the need for repairing.

Embodiment Hereinafter, a television receiver of the present invention will be described in detail according to an embodiment shown in the accompanying drawings.

The drawings are for explaining an example of implementation of the television receiver of the present invention, and FIG. 1 is a block diagram showing a circuit configuration of the television receiver.

In the figure, 1 is a tuner, 2 is a video intermediate frequency amplifier circuit, 3 is a video detection circuit, 4 is a color reproduction circuit, and three color signals R, G, B are obtained from the composite signal output from the video detection circuit 3. Is what you get. 5 is a video switching circuit,
It has three internal (I) side switching terminals, three external (E) side switching terminals, and three common terminals, and the internal (I) side switching terminals have color signals R and G from the color reproduction circuit 4. , B, and external input terminals ExtR, ExtG, E to the external (E) side switching terminals.
The color signals R, G, B from xtB are received, and the color signals R, G, B are sent to the adjusting circuit 6 from the three common terminals.
The adjusting circuit 6 is for adjusting the contrast and the brightness of the image, receives the contrast control signal and the bright control signal, and controls the contrast and the brightness according to the control signal. The color signals R, G, B output from the adjusting circuit 6 are input to the cathode ray tube 7.

8 is an audio intermediate frequency amplification and audio detection circuit, 9 is an audio switching circuit, the internal (I) side switching terminal receives the audio signal from the audio intermediate frequency amplification and audio detection circuit 8, and the external (E) side switching terminal The audio signal from the external input terminal ExtA is received, and the audio signal is sent from the common terminal to the audio output circuit 10. 1
Reference numeral 1 is a speaker for reproducing the audio signal output from the audio output circuit 10.

12 is a microcomputer functioning as a system controller of the television receiver, 13 is a CPU, 14
Is a ROM, 15 is a ROM, and 16 is a remote control signal acquisition interface, which is connected to a receiving circuit 17 for receiving a remote control signal. A photodiode 18 receives a remote control signal by infrared light.

Reference numeral 19 is an interface for receiving a key input signal when a key of the receiver main body is manually operated.
Connected with. Reference numeral 21 denotes an interface for outputting a switching signal, which sends the switching signal to the video switching circuit 5 and the audio switching circuit 9. Reference numeral 22 denotes an interface that outputs a signal for controlling various adjustment targets regarding video and audio, the output of which is input to the control circuit 23. The control circuit 23 is provided with a plurality of combinations of an up / down counter for storing the adjustment amount and a D / A converter for converting the adjustment amount, which is a digital amount stored in the counter, into an analog amount, corresponding to each adjustment target. Has been. Various analog control signals indicating the adjustment amount output from the control circuit 23 are input to the adjustment circuit 6, the color reproduction circuit 4, and the audio output circuit 10. The contrast control signal and the bright control signal output from the control circuit 23 are input to the adjustment circuit 6. Similarly, the audio control signal is input to the audio output circuit 10, and the hue control signal and the color control signal are input to the color reproduction circuit 4.

A non-volatile memory 24 stores a contrast adjustment amount for reproducing the composite signal, a contrast adjustment amount for reproducing the RGB signal, a bright adjustment amount for reproducing the composite signal, and a bright adjustment amount for reproducing the RGB signal. . The microcomputer 12 also has various circuits such as a channel selection interface and a display interface, which are not directly related to the essence of the present invention, so that the illustration and description thereof will be omitted. Reference numeral 25 is a computer connected to the television receiver as an external device,
The audio output terminal is connected to the external input terminal ExtA,
The output terminal for outputting the color signal R is the external input terminal ExtR.
The output terminal for outputting the color signal G is the external input terminal ExtG
The output terminal that outputs the color signal B is the external input terminal ExtB
, Respectively.

FIG. 2 is a flow chart showing a program executed by the microcomputer 12 when an adjusting operation for adjusting the contrast or a reproducing state switching operation between the composite signal reproducing state and the RGB signal reproducing state is performed.

(B) "Contrast adjustment operation?" This program is executed when an adjustment operation to adjust the contrast is performed, or when the reproduction state switching operation between the composite signal reproduction state and the RGB signal reproduction state is performed. To start. Then, after that, it is determined whether or not the performed operation is an operation for adjusting the contrast.

(B) “Rewriting the value of the contrast counter of the control circuit” If the result of the determination in step (a) above is “YES” (if the operation performed is a contrast adjustment operation), The value of an up / down counter (which plays a role of temporarily storing a digital “plurality of bits” contrast control amount) provided corresponding to the contrast in the control circuit 23 is the content of the contrast adjustment operation. Rewrite according to. For example, when the adjustment operation for increasing the contrast is performed, the stored value of the counter, that is, the contrast control amount is counted up, and when the adjustment operation for reducing the contrast is performed, the stored value of the counter is counted down.

When the value of the counter corresponding to the contrast changes in this way, the output of the converter that converts the value of the counter into an analog signal, that is, the contrast control signal is also switched according to the change of the value of the counter, and as a result, the contrast is changed. The contrast adjustment amount changes and becomes a value according to the operation content of the contrast adjustment operation.

(C) “What is the reproduction state?” After the above step (b), it is determined whether the current reproduction state is the composite signal reproduction state or the RGB signal reproduction state.

(D) "Rewrite the stored value of the contrast adjustment amount for reproducing the composite signal" If the result of the determination in step (c) is "composite signal reproducing state", for reproducing the composite signal of the non-volatile memory 24 The stored value of the contrast adjustment amount is rewritten according to the operation content of the contrast adjustment operation. That is, the current contrast adjustment amount is rewritten.

Then return.

(E) “Rewrite the stored value of the contrast adjustment amount for RGB signal reproduction” The result of the judgment in step (c) is “RGB signal reproduction state”
In this case, the stored value of the RGB signal reproduction contrast adjustment amount of the non-volatile memory 24 is rewritten according to the operation content of the contrast adjustment operation. That is, the current contrast adjustment amount is rewritten.

Then return.

(F) "Is the switching operation of the reproduction state?" When the determination result of the step (a) is "NO", it is determined whether or not the operation performed is the switching operation of the reproduction state. .

If the result of this determination is “NO”, the process returns.

(G) “Switching of playback state” If the determination result of the above step (F) is “YES”,
Switch the playback status. That is, when the current reproduction state is the composite signal reproduction state, it is switched to the RGB signal reproduction state, and when it is the RGB signal reproduction state, it is switched to the composite signal reproduction state. Specifically, from the interface 21 to the video switching circuit 5 and the audio switching circuit 9
Invert the switching signal sent to.

(H) “What is the playback state?” After step (g), the current playback state, that is, the playback state after the switching in step (g) is the composite signal playback state or the RGB signal playback state. To determine.

(I) “Read the stored value of the contrast adjustment amount for reproducing the composite signal and also the bright adjustment amount” If the result of the determination in step (h) is the “composite signal reproducing state”, the nonvolatile memory 24 is read. The stored value of the adjustment amount of the contrast for reproducing the composite signal and the stored value of the adjustment amount of the bright for reproducing the composite signal are read.

(E) “Read out the stored values of the contrast adjustment amount for RGB signal reproduction and the same brightness adjustment amount.” The result of the determination in step (h) is “RGB signal reproduction state”
If so, the stored value of the adjustment amount of the RGB signal reproduction contrast and the stored value of the RGB signal reproduction bright adjustment amount are read from the non-volatile memory 24.

(L) “Rewriting the values of the contrast counter and the bright counter of the control circuit” When step (re) or (nu) is completed, the control circuit is read according to the stored value read in that step (ri) or (nu). The values of the contrast counter and the bright counter 23 are rewritten. That is, if the step (re) is completed (when the composite signal is currently being reproduced), the value of the contrast counter is rewritten according to the stored value of the contrast adjustment amount for reproducing the composite signal, or the composite signal is reproduced. The value of the bright counter is rewritten according to the stored value of the signal reproduction bright adjustment amount.
As a result, the contrast and brightness adjustment amounts become the same as the stored values of the composite signal reproduction contrast adjustment amount and the composite signal reproduction bright adjustment amount of the nonvolatile memory 24.

On the contrary, when step (nu) is completed (currently R
In the GB signal reproduction state), the contrast and brightness adjustment amounts become the same as the stored values of the RGB signal reproduction contrast adjustment amount and the RGB signal reproduction bright adjustment amount of the nonvolatile memory 24.

When this step (ru) is completed, it returns.

The above-mentioned program is a program executed when an adjustment operation for adjusting the contrast and a switching operation of the reproduction state is performed, but the execution program for adjusting the brightness is essentially the same as the program, and therefore will be described repeatedly. do not do.

Further, in this television receiver, other adjustment targets, that is, color, hue, and volume are adjusted by another flow (not shown) of the program. The same applies to channel selection and the like. Furthermore, the color and hue adjustments in this television receiver can be made only during reproduction of the composite signal.

According to such a television receiver, when the operation of adjusting the contrast is performed during reproduction, for example, the routine of steps (a), (b), (c) and (d), or (a), (b), By the routines of (C) and (E), the contrast can be switched according to the adjusting operation and the memory can be re-stored. That is, the contrast changes as newly specified by the adjusting operation in step (b). Then, depending on the current reproduction state, when the composite signal reproduction state is set in step (d) or step (e), the stored value of the composite signal reproduction contrast adjustment amount of the non-volatile memory 24 is set to the RGB signal reproduction state. At this time, the stored value of the RGB signal reproduction contrast adjustment amount can be rewritten according to the content of the adjustment operation.

When the reproduction state switching operation is performed, the reproduction state is switched by the routines of steps (a), (f) and (g). When the reproduction state is switched, the new reproduction state is stored in the non-volatile memory 24 by the routine of step (h), (ri), (ru) or the routine of step (h), (nu), (ru). The adjustment amount of contrast and brightness is switched according to the adjusted amount of contrast and brightness.

Therefore, the contrast and the brightness are switched when the re-emission state is switched, and it is not necessary to perform the operation of switching the contrast and the brightness. Therefore, the operability is improved.

Then, it becomes possible to adjust the contrast with respect to the RGB system and the contrast with respect to the internal system (composite system) by using one adjustment volume or one system such as an up / down key.

As for hue, color, etc., as in the case of contrast and bright, the adjustment amount for composite signal reproduction and R
The GB signal reproduction adjustment amount may be stored separately, and the adjustment amount may be automatically switched when the reproduction state is switched. However, in practice the need to do so is much less intense than in the case of contrast, bright.

According to the present invention, the adjustment amount for reproducing the composite signal and the adjustment amount for reproducing the RGB signal are separately stored for at least one adjustment target, and when the composite signal reproduction state is switched, the composite signal is reproduced. When the RGB signal reproduction state is switched according to the stored value of the adjustment amount for signal reproduction, the adjustment amount of the adjustment target is controlled according to the stored value for RGB signal reproduction. The operability is improved without the need for adjusting operation.

[Brief description of drawings]

The drawings are for explaining an example of an embodiment of the television receiver of the present invention. FIG. 1 is a block diagram showing a circuit configuration of the television receiver, and FIG. 2 is a flow chart showing a program relating to adjustment. Explanation of sign 24 ... Storage means

Claims (1)

[Claims] 1. A television receiver capable of switching a reproduction state between a composite signal reproduction state and an RGB signal reproduction state, wherein at least one adjustment target relating to video is used for reproduction of the composite signal. A storage means for storing the adjustment amount and the adjustment amount for RGB signal reproduction is provided, and when an adjustment operation for switching the adjustment amount of the adjustment target is performed, the time when the adjustment operation is performed is the composite signal reproduction time. If so, the stored value of the composite signal reproduction adjustment amount of the storage means is the same as the stored value of the RGB signal reproduction adjustment amount of the storage means if the adjustment operation is performed when the RGB signal is reproduced. It is switched according to the content of the adjustment operation, and when the playback state is switched, when the composite signal playback state is entered. When the stored value of the composite signal reproduction adjustment amount is read from the storage means and the RGB signal reproduction state is set, the storage value of the RGB signal reproduction adjustment amount is read from the storage means, and the adjustment target adjustment amount. A television receiver characterized in that it is adjusted according to the stored value read by