CN2783657Y - Input device for digital television set-top box - Google Patents
Input device for digital television set-top box Download PDFInfo
- Publication number
- CN2783657Y CN2783657Y CNU2005200542158U CN200520054215U CN2783657Y CN 2783657 Y CN2783657 Y CN 2783657Y CN U2005200542158 U CNU2005200542158 U CN U2005200542158U CN 200520054215 U CN200520054215 U CN 200520054215U CN 2783657 Y CN2783657 Y CN 2783657Y
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- circuit
- keying
- top box
- remote
- keyboard
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Abstract
The utility model relates to an input device for a digital television set-top box. The utility model comprises a panel keying circuit and a user control command receiving circuit, wherein the panel keying circuit comprises a keyboard array, a keying signal scanning input circuit and a keying coding output circuit, wherein the keying signal scanning input circuit and the keying coding output circuit are contained in a remote control emitting IC of any model; besides, the panel keying circuit also comprises an inverter, the keyboard array is connected with the input end of the remote control emitting IC, and the keying coding output end (P8) of the remote control emitting IC is connected with the coding input end of the inverter. Besides, the user control command receiving circuit comprises a remote control receiving IC and a keying receiving circuit, wherein the keying receiving circuit is the same with the panel keying circuit, and the output end of the inverter in the panel keying circuit, the output end (RC end) of the remote control receiving IC and CPU I/O port (P31_PI00/1_IN) are mutually connected. The utility model is simple in structure and low in cost, and can not generate confusion or short circuits even though the utility model is operated in a remote controller mode or a keying mode.
Description
Technical field
The utility model relates to a kind of digital TV set-top box, particularly the input unit that comprises panel remote-control receiving circuit and Users panel key controlling command receiving circuit of digital TV set-top box.
Background technology
Digital TV set-top box and user's communication media mainly is that remote control reception and button receive the panel of forming, panel comprises that also the digital demonstration of LED waits circuit, wherein the remote control receiving unit is fairly simple, it is the IC of a collection infrared reception-frequency-selecting amplification-demodulation-multinomial function of coding output, and special I/O mouth (P31_PIO0/IR_IN) that its output is directly linked CPU comes transmission information.And key circuit also can only utilize this unique I/O mouth to transmit information with CPU.This state is (for example, the set-top box of PHILIPS-MOJO scheme) by the bottom layer driving software decision of system, also is unmodifiable.If the two-way output line is connected on the I/O line, then can causes the signal confusion, even short-circuit condition occur.Addressing this problem not so difficultly, is to find the simplest a kind of method to achieve the goal and make the people interested.
The utility model content
The two-way output that the utility model receives at a kind of panel remote control reception of user control command receiving circuit and button is connected the digital TV set-top box input circuit on the I/O line of CPU.The technical problems to be solved in the utility model provides a kind of set-top box panel key circuit simple in structure, with low cost and user control command receiving circuit, to eliminate the short circuit phenomenon that signal is chaotic and may occur.
Digital TV set-top box input unit provided by the utility model comprises: panel button circuit and user control signal receiving circuit, described panel button circuit comprise keyboard array, push button signalling scanning input circuit, keyboard-coding output circuit; Described push button signalling scanning input circuit and keyboard-coding output circuit are contained among the remote-control transmitting IC of a disposable type, described key circuit also comprises an inverter, described keyboard array links to each other with the signal input part of described remote-control transmitting IC, the keyboard-coding output (P8) of described remote-control transmitting IC links to each other with the coding input of described inverter, and the output signal of described inverter is sent to the I/O mouth of set-top box CPU.
As improvement, also be provided with the weakening loop on the remote-control transmitting IC of the utility model panel button circuit.
As a kind of execution mode, the inverter of the panel button circuit in the utility model input unit is made of a NPN triode, and its output is open collector output.
Panel user control command receiving circuit in the digital TV set-top box input unit provided by the utility model comprises remote-control receiving circuit and button receiving circuit, and its output links to each other with the I/O mouth of set-top box CPU; Described remote-control receiving circuit is that the remote control that a collection infrared reception, frequency-selecting amplification, demodulation, coding are exported multinomial function receives IC; Described button receiving circuit such as above-mentioned panel button circuit, wherein the output of inverter, remote control receive IC output (RC end) in the panel button circuit, 3 in CPU I/O mouth (P31_PIO0/1_IN) interconnects.
Implement the digital TV set-top box input unit that the utility model provides, comprise set-top box panel key circuit and user control command receiving circuit, available remote controller or button are handled set-top box respectively, both just dual mode operate simultaneously also not can confusion reigned and short circuit, just CPU selects the former in two group codings, its advantage is the seamless link design, and circuit structure is simple, and the cost increase but is zero.
Description of drawings
Figure 1 shows that the theory diagram of panel user control command receiving circuit in the utility model digital TV set-top box input unit.
Figure 2 shows that the electrical principle block diagram of set-top box panel key circuit in the utility model digital TV set-top box input unit.
Embodiment
As shown in Figure 1, panel user control command receiving circuit comprises remote-control receiving circuit and button receiving circuit in the utility model digital TV set-top box input unit, and described remote-control receiving circuit is that the remote control that a collection infrared reception, frequency-selecting amplification, demodulation, coding are exported multinomial function receives IC; Described button receiving circuit (panel button circuit just) comprises keyboard array, push button signalling scanning input circuit, keyboard-coding output circuit and inverter, wherein, push button signalling scanning input circuit and keyboard-coding output circuit are contained among the remote-control transmitting IC of a disposable type, and the output of inverter, remote control receive IC output (RC end) in the panel button circuit, 3 in CPU I/O mouth (P31_PIO0/1_IN) interconnects.
The electrical schematic diagram of panel button circuit in the utility model digital TV set-top box input unit as shown in Figure 2, at first learn from the button output circuit, this output is one group of anti-phase signal, must have anti-time phase before sending it to CPU, otherwise CPU can't discern again.Inverter is made of a NPN triode Q401 and resistance R 412, the output of triode Q401 is designed to OC door (open collector output), base stage is connected with the keyboard-coding output P8 of remote-control transmitting IC by the series circuit of resistance R 404 and capacitor C 410, grounded emitter, resistance R 412 are connected between the base stage and emitter of triode Q401.Again OC gate output terminal, remote control are received IC output (RC end), 3 connections of CPU I/O line, just finished design.Present available remote controller or button have been handled set-top box respectively, even if operate simultaneously also not can confusion reigned and short circuit for dual mode, just CPU selects the former in two group codings.So seamless connection design, the cost increase really is zero.Certain above-mentioned connecting circuit is one of patent protection point of the design, it comprise Q401, R412 among Fig. 2, R406 and with the connecting circuit of its composition.
The design of keyboard circuit is adopted keyboard usually and is shown two-in-one application-specific integrated circuit, and also available monolithic MCU designs.CPU only provides an incoming line and this I/O line can only discern the RC5 sign indicating number in native system, because of the coded system of keyboard application-specific integrated circuit is different therewith, so do not consider to adopt.And select for use monolithic MCU to design, and then need consider factors in the majority such as IC type selecting, development platform, R﹠D cycle, input cost, obviously this underemployed scheme is not our first-selection.From consult remote-control transmitting IC technical data, we find not modulated coding output line P8, and this just provides very big convenience for utilizing this IC to design key circuit.Earlier be linked to be the keyboard input circuit with this chip U402, in conjunction with aforesaid I/O connectivity scenario, this design has just been finished again.The key circuit that remote-control transmitting IC is made set-top box is a kind of simple and easy, particular design scheme (seeing U402 among Fig. 2) of cheap (the IC price is more than 2 yuan), and this is designed to one of protection point of this patent.
Among Fig. 2, set up the weakening circuit for improving circuit working stability, it is made of the resistance R between P2 that is connected remote-control transmitting IC and the P28 408, also belongs to the part of " remote-control transmitting IC is used for key circuit " patent protection point.
The utility model is because circuit design has simply, reliable performance and being adopted by many amounts of money sign indicating number TV set-top box.
Claims (3)
1. digital TV set-top box input unit, comprise panel button circuit and user control signal receiving circuit, described panel button circuit comprises the keyboard array, push button signalling scanning input circuit, the keyboard-coding output circuit, it is characterized in that: described push button signalling scanning input circuit and keyboard-coding output circuit are contained among the remote-control transmitting IC of a disposable type, described key circuit also comprises an inverter, described keyboard array links to each other with the signal input part of described remote-control transmitting IC, the keyboard-coding output (P8) of described remote-control transmitting IC links to each other with the coding input of described inverter, and the output signal of described inverter is sent to the I/O mouth of set-top box CPU.
2. according to the described digital TV set-top box input unit of claim 1, it is characterized in that: also comprise the weakening loop, constitute by the resistance between P2 that is connected described remote-control transmitting IC and the P28 (R408).
3. according to claim 1 or 2 described digital TV set-top box input units, it is characterized in that: described inverter is made of NPN triode (Q401) and resistance (R412); The output of triode (Q401) open collector, base stage is connected with the keyboard-coding output (P8) of remote-control transmitting IC by the series circuit of resistance (R404) and electric capacity (C410), grounded emitter, resistance (R412) is connected between the base stage and emitter of triode (Q401).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200542158U CN2783657Y (en) | 2005-01-21 | 2005-01-21 | Input device for digital television set-top box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2005200542158U CN2783657Y (en) | 2005-01-21 | 2005-01-21 | Input device for digital television set-top box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2783657Y true CN2783657Y (en) | 2006-05-24 |
Family
ID=36768636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2005200542158U Expired - Lifetime CN2783657Y (en) | 2005-01-21 | 2005-01-21 | Input device for digital television set-top box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2783657Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102547181A (en) * | 2011-12-28 | 2012-07-04 | Tcl王牌电器(惠州)有限公司 | Method for utilizing panel keys to simulate functions of remote controller and terminal |
-
2005
- 2005-01-21 CN CNU2005200542158U patent/CN2783657Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102547181A (en) * | 2011-12-28 | 2012-07-04 | Tcl王牌电器(惠州)有限公司 | Method for utilizing panel keys to simulate functions of remote controller and terminal |
| CN102547181B (en) * | 2011-12-28 | 2014-09-17 | Tcl王牌电器(惠州)有限公司 | Method for utilizing panel keys to simulate functions of remote controller and terminal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: MSTAR SOFTWARE DEVELOPMENT INC. Free format text: FORMER OWNER: BIQOQI DIGITAL CODE TECH CO., LTD., SHENZHEN CITY Effective date: 20130718 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 518051 SHENZHEN, GUANGDONG PROVINCE TO: 518057 SHENZHEN, GUANGDONG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20130718 Address after: 518057 Guangdong city of Shenzhen province Nanshan District Gao Xin Road China science and Technology Development Institute of Technology Park building three floor tower 4-5 Patentee after: MStar Software Development (Shenzhen) Co., Ltd. Address before: 711 hatch room 518051, China Science and Technology Development Institute, hi tech Industrial Park, Guangdong, Shenzhen Patentee before: Shenzhen Bianqi Digital Technologies Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150121 Granted publication date: 20060524 |