JPS603282A - Subminiature television receiver - Google Patents

Abstract

PURPOSE:To attain small size, thin profile, light weight, ease of portability and easy-to-see picture by forming a TV reception circuit, a picture display device, and an operating mechanism as blocks and arranging each sounding device and operating mechanism at both sides of the picture display device. CONSTITUTION:A picture display section 103 of a subminiature TV receiver using a liquid crystal as a picture display device is formed at the center of an upper frame 101 of a housing 1, a sounding section 104 of a sounding device 8 is provided at the left side of the picture display section 103 and the operating mechanism 7 is mounted at the right side. Further, a channel selection display section 105 is provided at the upper right of the picture display section 103. Then a tuner 201 is arranged so as to be overlapped in terms of plane with the sounding device 8. A battery 9 being a power supply driving the circuit is arranged so as to be overlapped in terms of plane with a liquid crystal display panel 4.

Description

DETAILED DESCRIPTION OF THE INVENTION The present application relates to a television receiving circuit including a cheese, a video receiving circuit, and an audio receiving circuit, an image display device, a sounding device, and an operating device (11
The present invention relates to a micro-compact television receiver equipped with 1, particularly a micro-compact television receiver that uses a liquid crystal display panel as an image display device.

In recent years, consumer electronic devices such as game machines and pocket computers have become significantly smaller, thinner, and lighter, and this trend is accelerating.

This trend has spread to the field of television receivers, and several small-sized television receivers have already been proposed, and some have even gone on sale.

When these television receivers are classified, they can be roughly divided into two groups. Namely.

[I] A television receiver that uses a miniaturized C1 (T (cathode ray tube)) and a miniaturized cent. [1r] A television receiver that uses a liquid crystal display panel for the image display device. [11] Furthermore, there are two types: a type in which an image display device and a television receiver circuit are integrated, and a type in which a single image display device and a television receiver body are separated.

However, the television receiver using the small CRi" in [■] requires a high-voltage circuit like a deflection circuit to drive the CRT, making the circuit configuration complicated and making it difficult to reduce power consumption. Small, thin, and lightweight chair! 41CL
<-This is an obstacle to improving portability (also, C
Since I am using "It i", the outdoor brightness is 4℃・+
AV F9 has the problem that the image is 1ij/1'.

[11] A television receiver using the liquid crystal display panel takes advantage of the characteristics of the liquid crystal display panel itself: thin, lightweight and low weight. Although it is advantageous for cents to be small, thin, and lightweight,
The TV reception methods proposed to date are large and heavy, and it is difficult to find good portability.

Especially iI! ! Since the i-image display device and the TV receiver are separated, they require cables and connectors to electrically connect the two, which significantly impairs portability and operability. , and the reliability of the ``drowsy connection'' between the two is also low.

Another problem is that the image display device itself is too small and difficult to view.

As described above, the small-sized television receivers that have been proposed in the past have many problems.

The present invention solves the problems of conventional small TV receivers as described above, by making the image display surface as large as possible, making the external dimensions of the housing as small and thin as possible, and reducing the weight of the upper throat of the TV receiver. The purpose of the present invention is to propose a layout configuration for realizing a television receiver with improved portability.

For this purpose, the television receiving circuit, image display device, and operation mechanism are each made into blocks.The image display device is placed in the center of the Uzing, and each side of the image display device is made to sound separately, avoiding two-dimensional overlap. By arranging devices and operating mechanisms, an ultra-compact television receiver that is small, thin, lightweight, highly portable, and provides easy-to-see images has been realized.

Embodiments of the present application will be described in detail below based on the drawings.

FIGS. 1(a) to 1(d) are drawings showing the appearance and arrangement of main components of a television receiver according to an embodiment.
The housing is composed of an upper frame 101 and a lower frame 102, each of which is a T-piece obtained by injection molding synthetic resin (polycarbonate in the embodiment). ”-An image display section 106 is formed in the center of the frame 101. On the left side of the image display section 103, a sound emitting section 104 of the light beam device 8 is provided, and furthermore, at 11111, there is a power switch knob 701 that constitutes the shift operation mechanism 7, which will be explained in detail later, and a pan l' for switching the receiving band. 9J 4-no+- switch knob 70
2 is installed.

Further, on the upper right side of the image display section 106, there is provided a channel selection display section 105 for displaying the reception channel.

201 is chew, V Hl;” obi and Ul-IF
It is designed to be able to receive radio waves and to be compact in size. The tuner 201 has a sound generating device 8 and a flat 1/jT
, the city is arranged on the left side of the image display section 106.

4- is a liquid crystal display panel used as an image display device, in which an upper transparent substrate 4[]1 and a lower transparent substrate 402 are integrated with a certain gap maintained, and a liquid crystal material (not shown) is placed in this gap. It is injected with. The upper transparent substrate 401 and the lower transparent substrate 402 of the liquid crystal display panel are overlaid and integrated, and one liquid crystal display panel 4 is formed in each portion where they protrude from each other.
Signal electrode drive circuits 401a, 401b and a scan electrode drive circuit 402a, which are integrated circuits for driving each electrode, are mounted. The liquid crystal display panel 4 is held by the upper frame 101 so that its display area corresponds to the image display section 106, and the tuner 201 and the sound generating device 8 are arranged so as not to overlap with each other in a plane.

706, 701, 705 are knobs that are part of the operating mechanism for operating the television receiver from the outside, 706 is a selection knob for selecting the reception channel, and 704 is for adjusting the brightness of the display surface of the liquid crystal display panel 4. Brightness adjustment knob, 7
05 is a sounding device 8-gdat + a volume knob for adjusting. Tuning knob 703. The brightness adjustment knob 704 and the volume knob 7.05 are located on the right side of the image display section 106 and at the end of the nousing 1 to improve operability and to
This makes it easy to block 4777.

Reference numeral 9 indicates a drive source for all the circuits included in the television receiver, and in one embodiment, four AAA-sized manganese drywalls were used connected in a row of four wooden strips. The battery 9 is arranged so as to overlap the bottom of the liquid crystal display panel in a plane, and is provided in the lower frame 102 and stored and held in the battery chamber 106;
It has a highly reliable structure designed to prevent damage to the television receiver caused by the 47i liquid.

Reference numeral 10 denotes a rod antenna for receiving television broadcast waves, which is disposed above the one-image display section 103 on the front side of the upper frame 101, and has a base 10a fixed to the upper frame 101 with screws. By adopting this arrangement, the movable range of the rod antenna 1o can be greatly expanded, and excellent reception can be performed without being restricted by the orientation of the user.

In addition, in addition to using the receiver in the user's hand, it can also be used on a desk.
Even when the rod antenna 1o is placed at an optimal angle for reception, the movable range of the rod antenna 1o is not restricted, and the operability is greatly improved.

Note that the television receiver of one embodiment is not shown in the figure.
A stand for easy storage and removal is attached to the -F frame 102 so that it can be placed on a desk or the like at an optimal angle.

FIGS. 2 to 7 all show cross sections of the embodiment, and A-A=B-B=C-C=D-D in FIG. 1, respectively.
= E-E cross section and mounting part of signal electrode drive circuit 401a of liquid crystal display panel 4 - scanning electrode, drive circuit 402a
The implementation part is shown. Incidentally, parts that are the same as those explained in FIG. 1 are given the same numbers.

107 is a panel windshield, and the image display section 1 of the upper frame 101
03 is integrated with adhesive. The panel windshield 107 has a frame-shaped print on the outer periphery of the lower surface. The dimensions of the display screen are determined by the parting section 106a of one image display section, and one screen is made larger, and - the image display section 106 and the upper frame 101
This printing was designed in consideration of the design balance. Reference numeral 108 denotes a battery cover, which is integrated with the lower frame 102 by elastic bonding and is designed for ease of operation when replacing the battery 9.

2 is a first circuit block, the appearance of which is shown in FIG. Reference numeral 202 is a board, which includes the chew 20 described above.
In addition to 1, integrated circuits 203 to 206, coil 207, aluminum' decomposable capacitor 2D'8, jacks 209, 210
, 211 has been implemented (・ru.

These "1 child components are mounted on the top side of the board, and chip-shaped transistors 212 and capacitors 2 are mounted on the bottom side.
A single resistor 214 is mounted.

In this way, the iU child components with different shapes can be placed on the board 20.
By separately mounting the upper and lower surfaces of 2, it is possible to achieve high-density mounting, making it possible to make the device smaller and thinner.

The jack 209 is for listening to audio information through earphones (not shown), and is located at the lower right end of the board 202.The relationship with the aforementioned sound generating device 8 is as follows: insert the earphone plug into the jack 209. Then, the output of audio information is switched to either the sound generating device 8 or the earphone. The jack 211 is an external antenna jack, which is placed in the upper left corner of the board 202, and connected to the rod antenna 10 and θ plane. By providing a positional relationship, consideration was given to accidents caused by incorrect insertion with the earphone jack 209.The external antenna jack 210 is configured to be switchable with the rod antenna 10, and in addition to normal TV broadcast radio waves, It can input signals from video equipment (1 (F signal)), takes into consideration diversification of usage forms and methods, and has high added value as a personal information device.

The jack 211 is an external power supply jack, and is used to connect a power source other than the built-in battery 9, such as a pantry pack, AC
It can also be used with adapters, car battery adapters, etc., in an effort to diversify power sources.

215 is a bar antenna constituting the AM radio receiving circuit, and is made of a ferrite core wound with a conducting wire. The bar antenna 215 is disposed at the right end of the substrate 202 so that its axial direction is directly parallel to the longitudinal direction of the top throat of the television receiver, in order to improve and make the reception sensitivity uniform.

Further, the bar antenna 215 is adhesively held on a support frame 216 that is integrated with the substrate 202 by means of adhesive or the like. The support frame 216 includes a channel selection volume 217, a brightness adjustment volume 218. It positions and lengthens the volume control volume 219 and the channel selection display drum 10'5a. The brightness adjustment knob 704 and the volume knob 705 are each a brightness adjustment volume 218. The sound is screwed into the adjustable polyram 219.

The tuning volume 217 is integrated with the tuning display drum 105a by screws, and the tuning display drum 105a is rotatably engaged with the tuning knob 706.

As explained above, the mechanical part of the operating mechanism 7 is divided into blocks as in fIX, and is attached to the left end of the board 202 to constitute the first circuit block 2.

9 is the second circuit block, and its appearance is shown in FIG. Reference numeral 601 denotes a substrate on which an It source switch 602 and a band changeover switch 606 are mounted, as well as conductive patterns 601a, 6011) for electrical connection with the liquid crystal display panel 4 described above. 3
This is a connector for 04a-304b computers.

On the lower surface of the substrate 301, integrated circuits 605, 606-, a crystal resonator 607 serving as a reference vibration source for the integrated circuit 6050, chip-shaped capacitors, resistors, and transistors are mounted. 308a=3081] is a conductive pattern for connecting the first circuit block 2, power supply, and signal.

The layout of the electronic components mounted on the upper surface side of the first circuit block Z and the lower surface side of the second circuit block A is divided into blocks with one circuit function, taking into consideration capacitive and inductive interference, and It is arranged so that the thickness is the minimum.

In the embodiment, the entire circuit system was implemented by dividing it into a first circuit block Z and a second circuit block A, but the position of this division requires a multifaceted inspection. Examples will be described later. In the circuit system block diagram of FIG. 10, basically the circuit system after the video output signal is mounted in the second circuit block A, and the others are mounted in the first circuit block 2. This j14 configuration enables 1) easier assembly, adjustment, and inspection, 2) improved maintenance and after-sales service, 3) high-density mounting, and 4) improved reliability by minimizing the number of mutual electrical connection terminals. -The following advantages were obtained.

Next, the mounting portion of the square electrode drive circuit 401a in FIG. 7(a) and the mounting portion of the scanning electrode drive circuit 402a in FIG. 7(1) will be described. 406 is a signal electrode drive circuit 401
It is a positioning frame for a and is integrally bonded to the two transparent substrates 401. 404 is a sheet-like connector.
An extremely low resistance conductor 'l'E is installed at a position corresponding to the external 7I-1-ellipse (1-1 not shown) of the No. 46 electrode drive circuit 401a.
The t section is formed. 405 is Oshienokune-C.

” Nikono σmei 4! '! The connector 404 connects the turn (not shown) to the electrode (i'i) electrode movement circuit 4011.
This can be done by applying force through the push button 405. According to this structure, the liquid crystal display panel 4 and the substrate 301
The number of terminals in contact with the conductive turn 301a is greatly reduced, improving assembly workability and reliability of the N6M.The mounting part of the scanning electrode drive circuit 402a also improves. The basic structure is the same.

406 is a positioning frame 40 of the scanning electrode drive circuit 402a
7 is a connector, and 408 is a pusher.

From the above explanation, the planar and cross-sectional arrangement of the components of the television receiver of the embodiment can be understood and considered, so why is it possible to make it smaller and thinner according to the arrangement of the present application? I'll explain.

The components that affect the external dimensions of the television receiver are a liquid crystal display (liquid crystal display) 4, an operating mechanism 7, a sounding device 8, a battery 9, and a tuner 201. Combinations 1 of the planar and cross-sectional arrangement of these components are set 7, and in each combination example, the external dimensions, the shape of the substrate 202, 601,
We conducted a multifaceted study of electronic component layout and wiring flexibility, operability, design considerations, etc., and in order to satisfy the inspection requirements mentioned above and to make the set smaller and thinner, we
I found a good deal. These conditions are: 1) If the LCD panel 4 and the cheese 201 are two-dimensional in a car, 2)
) Operation ('IE 4' geometry 7 is arranged as a block on the right end of the set, and has a liquid crystal display) It is horizontally heavy and similar to the panel 4.

On the other hand, considering the loss of received radio waves and noise resistance, it is necessary to minimize the connection distance between the rotary antenna 10 and the antenna input terminal (not shown) of the tuner 201.

If you apply the above details to 711i4-1, the operating mechanism 7 should be ψ1 to the right of cent. 1i BB K - The liquid crystal display panel 4 is located in the center, the tuner 201 is located at the left end, the sound generating device 8 is located above the tuner 201 to avoid being flat with the liquid crystal display panel 4, and the battery 9 is located above the liquid crystal display panel 4. It is arranged under the display panel 4. According to this arrangement, the i=image display surface can be made large, the display can be easily seen, the set can be made smaller and thinner, and it can be carried. Extremely improved.

Next, the circuit system of the embodiment will be briefly explained using the block diagram shown in FIG. 25[l is a video receiving circuit, which is composed of an integrated circuit 205 that integrates a video intermediate frequency amplification circuit 251, a video detection circuit 252, a video amplification circuit 256, and an AGC circuit 254, and some other components (=J components). .255
1 is a voice receiving circuit, which is composed of an integrated circuit 204 in which a voice intermediate frequency amplification circuit 256 and a voice detection circuit 257 are integrated, and external components. 258 is an audio amplification path L1, which is composed of the integrated circuit 206 and some outer fence parts. 259 is an AM radio receiving circuit, and integrated circuit 20
3 and external parts such as coil 207 and capacitor 208,
and a bar antenna 215. Reference numeral 260 denotes a channel selection control circuit, which has the function of selecting a desired channel from the television broadcast waves using the volume 217 and tuner 201.

A power supply circuit 261 is composed of a constant voltage circuit 26'2 and a booster circuit 266, and has the function of boosting the voltage of the battery 9 and supplying a plurality of stabilized voltages.

3 [15 is a drive control circuit, A/D conversion circuit 305
a, synchronous separation circuit 605b, 1lilJ control circuit 605C
It is composed of and integrated. The output signal of the drive control circuit 605 is input to the integrated level shifter 06, and a part of it is input to the signal electrode drive circuit 401a, 401.
b.

To explain the operation - TV broadcast waves received by the rod antenna 10 are sent to the tuner 201 - channel selection 11i11
The f output circuit 260 selects a desired channel and converts the frequency into an intermediate frequency signal. The intermediate frequency signal is input to the video reception circuit 250, and the video intermediate frequency amplification circuit 2
The signal is amplified at 51 and input to the video detection circuit 252. The video signal, which is the video detection output, is sent to the A/D of the drive control circuit 605.
The conversion circuit 605a performs conversion of the synchronization component (Al1 of the video signal input to the distortion circuit 605b) and separation of the synchronization signal. The 1lilJ 11111 circuit 605C is separated from the video signal and has an Al conversion circuit 305 that controls the signal so that the signal always maintains a predetermined relationship. The output signal of a is input to the signal electrode 11 drive circuit 401a, 401'l). The output signal of the fli control circuit 605C is input to a level shifter 606, and the voltage level is converted. The output signal of the level shifter 606 is connected to the electrode drive circuit 402a, the signal electrode, and the drive circuits 401a and 401b.
and drives the liquid crystal display panel 4.

Therefore, video information is displayed on the liquid crystal display panel 4.

On the other hand, as for the audio signal, a beat signal of 1-Video FJ = 4.5 CMHz between the two audio carriers generated in the video detection output is inputted to the audio receiving circuit 255, and the audio intermediate frequency amplifying circuit 2
After being amplified in step 56, the signal is detected by an audio detection circuit 257. This audio signal is amplified by the audio amplifying circuit 258 and the sounding device 8 is driven to obtain audio information.

Having described the above in detail, the features of the television receiver of the embodiment will now be summarized.

■) Since the image display section is placed in the center of the cent, a large liquid crystal display panel can be used compared to the external dimensions of the set, which not only provides easy viewing and display on a single dog-shaped screen, but also allows one user to If you do not hold the set with your left hand while viewing the screen, your finger will not touch the image display area, making it difficult for shadows to appear.

2) The components of the operating mechanism are mostly mounted on the support frame and made into blocks, and are placed to the right of the arrow on the front of the image, providing excellent operability.

3) It is equipped with an AM radio receiving circuit, and an earphone jack is placed on the right end of the centimeter, so that you can listen to and operate TV audio information or Δ~I radio broadcasts while carrying it in your pocket. is possible.

4) We attempted to improve operability by placing highly related parts close to each other, such as the channel selection display section, the channel selection knob, and the rod antenna and external antenna jack.

5) Earphone jack, external antenna jack, and power jack are placed on separate sides to prevent accidental operation. 6) Equipped with an external antenna jack, making it easy to connect to other video equipment. performance, and its added value as a personal information device has been increased.

7) Since the rod antenna is placed on the top front of the cent, the rod antenna's own driving range can be expanded, and
Improved operability.

8) The circuit system is divided into two blocks, which not only simplifies assembly, inspection and adjustment, but also provides excellent after-sales services such as maintenance and replacement.

9) The set is small, thin and lightweight, making it extremely portable. 10) The design is well-balanced and has a luxurious feel.

As described above, the television receiver having the arrangement according to the present invention has many features, and its practical effects are outstanding.

[Brief explanation of the drawing]

Figure 1 shows the external appearance and arrangement of component parts of the television receiver according to the embodiment. Figure 1 (a) is a plan view, Figure 1 (1) is a top side view, and Figure 1 (C) is a right side view. The top view, FIG. 1(d) is the left side, FIGS. 2 to 7 all show the cross section of FIG. 1(a), and FIG. 2 is the A-A l'lJi side view. Figure 3 is a BB sectional view, Figure 4 is a CC sectional view, and Figure 5 is a D-
D sectional view - FIG. 6 is a EE sectional view. Figure 7 (a>
is a sectional view showing the mounting part of the signal electrode drive circuit, and FIG.
) is a sectional view showing a mounting part of the scan electrode drive circuit. Figure 8 shows the appearance of the first circuit block. Figure 8(a)
is a top view, and FIG. 8(b) is a bottom view. Figure 9 is the second
FIG. 3 is a plan view showing the appearance of the circuit block of FIG. FIG. 10 is a block diagram without showing the circuit system. 201... Tuner, 250... Video receiving circuit, 255... 14 voice receiver 46 circuits, 4... Liquid crystal display panel, 8... Sound generating device. 7...Operation/structure, 1...Housing, 1
01...Top frame, 102...Bottom frame, 108...
・・・Ih, hole cover. Figure 4 Figure 5 Figure 6 Figure 7 (b) 7.07 Figure 8 (b)

Claims (1)

[Claims] A television receiver circuit including a video receiving circuit and an audio receiving circuit (+ii "") - an image display device that displays video information output from the television receiving circuit, and an audio 'li!
a sounding device for outputting J information, an operating mechanism for operating the television receiving circuit from the outside, and a housing for holding and housing the television receiving circuit, the image display device, the sounding device, and the operating device 1117; A micro-compact television receiver characterized in that the device is arranged in the center of the housing, and a sounding device and an operation device are arranged and configured on both sides of the image display device.