JPS5856307B2 - TV with keyboard - Google Patents

Description

[Detailed description of the invention] The present invention relates to a television with a keyboard.

For example, a so-called calculator TV has been devised that displays a calculator (hereinafter referred to as a calculator) on a cathode ray tube and can also be enjoyed as a regular TV, but it requires an operation to switch between the calculator function and the TV function. It was.

The present invention provides a keyboard that can be stored or detached in a television set, and when the keyboard is taken out (pulled out) for the purpose of calculation etc., it automatically moves to an empty channel, displays the calculation etc., and ends the program. To provide a television with a keyboard that automatically returns to the previous channel and receives broadcasting when the keyboard is stored.

An embodiment of the keyboard-equipped television according to the present invention will be described below with reference to the drawings.

FIG. 1 is an external view of a television with a keyboard according to the present invention.

In the figure, T is a keyboard drawer handle, C8W is a group of channel selection switches, and CRT is a display section.

Figure 2 shows the keyboard K by the keyboard drawer handle T.
Pull out B to show that it is in calculation mode.

FIG. 3 is a cross-sectional view of the keyboard-equipped television shown in FIG. 1.

In the figure, Jl, J2 y J3 t J4 are the signal terminals provided on the TV set side, and the keyboard KB
It is provided to detect the state of the drawer.

Such signal terminals are formed by, for example, a pattern on a printed board.

To explain further, the reference voltage Vss is applied to the signal terminal J3 and the contact J on the back side of the keyboard KB is applied.

By receiving Vss at the terminal KB and applying Vss again to terminal J1 or terminal J2 depending on how the keyboard KB is pulled out, the TV side detects whether it is being pulled out or not. Also, terminal J4 is used as the other key signal line terminal. It emits a signal when the key is pressed when it is pulled out.

Also, in FIG. 4, terminal J1. Contact J provided on the keyboard KB on the J2 pattern.

It is hailing that it will move.

By adopting such a configuration, the key part KEY can be made extremely thin, and by increasing the number of keys and signal terminals such as terminal J4, a desired keyboard can be obtained.

Also, it goes without saying that grooves or the like should be provided in the sliding portions on the TV side and the keyboard side.

Figure 5 shows an example of a circuit that performs signal processing of the detection unit shown in Figures 3 and 4. In the figure, C1, C2, C3, and C4 are channel selection buttons, and when each button is pressed or touched, Vss passes and flip-flop "1"
t ``2 t ``3 t ''4, and by applying the signals from the selection buttons C1, C2, C3°C4 to the reset side R of the intervening flip-flop via the OR gate t-0R1, the previous This will reset the channel.

To explain in more detail, the flip-flops F1 to F4 are set priority flip-flops, and for example, the button C1
When you touch the flip-flop F1, set and reset signals are applied at the same time, but the set priority is given to the flip-flop FatF3. F4 is reset by OR gate OR1 since there is no set signal.

SW is the detection means explained in FIG.
ss to indicate that a level is added.

Also, although not shown in the figure, buttons C1, C2°C3,
It is assumed that the C4 detection means SW and the like are at a negative level in the open state.

This can be done by connecting it to the VDD level via a resistor or the like.

KEY is the key signal section for the calculator, CPU is the calculation processing unit, ■
F is an interface section that receives and stores signals from the aforementioned CPU and at the same time outputs display contents as a signal synchronized with an empty channel of a television device via an RF modulation circuit for cathode ray tube display; TV is a television device; input section TV1; The receiving channel is switched in accordance with the channel selection signal from the interface section IF, the signal from the interface section IF or the broadcast radio wave is received, and the contents of Y are displayed on the display section CRT.

To explain further, when the keyboard is stored, terminal J2
AND gates G1 to G4 are prepared, and the states of flip-flops F1 to F4 pass through the AND gates to instruct the television set TV to select a channel, but when pulled out, the Vss level that passed through terminal J1 is It is ORed to the AND gate G2 output.

Now, if button C2 is an empty channel, the moment you pull out the keyboard KB, the TV will detect it as if you had selected channel 2, and when you put the keyboard away again, the previous channel will be given to the TV via the AND gate. It is something.

As explained above, the user can very easily use the T'V as a calculator.

Furthermore, it goes without saying that free channels can be changed freely depending on the region.

Further, even if a plurality of keyboards are housed and various functions other than a calculator are incorporated, the gist of the present invention will not be compromised.

According to the present invention, a user can use a multipurpose television whose operation is easy to understand and whose appearance is not damaged.

[Brief explanation of drawings]

FIG. 1 is an external view of a television with a keyboard according to the present invention, FIG. 2 is a view showing the keyboard KB shown in FIG. 1 in a pulled out state, FIG. 3 is a cross-sectional view shown in FIG. 1, and FIG. 1st
The longitudinal cross-sectional view shown in the figure, FIG. 5, is a main circuit diagram of the keyboard-equipped television shown in FIG. 1. C1~C4...Channel selection button, SW・
- Hit detection section, F1 to F4...Flip-flop.

Claims (1)

[Claims] 1. A keyboard that can be stored in a television cabinet and that specifies channels on the television; a first detection means that detects that the keyboard has been pulled out from the device; and a first detection means that detects that the keyboard has been pulled out of the device. means for storing the channel designation indicated by the keyboard and designating a predetermined channel when the keyboard is detected; a second detecting means for detecting that the keyboard is stored in the cabinet of the television; A television with a keyboard, comprising means for returning to the channel designation based on the keyboard instruction stored by the designation means when the second detection means detects that the keyboard is stored.