CN204650515U - The compatible circuit of a kind of MIPI screen and LVDS screen - Google Patents
The compatible circuit of a kind of MIPI screen and LVDS screen Download PDFInfo
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- CN204650515U CN204650515U CN201520341609.5U CN201520341609U CN204650515U CN 204650515 U CN204650515 U CN 204650515U CN 201520341609 U CN201520341609 U CN 201520341609U CN 204650515 U CN204650515 U CN 204650515U
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Abstract
The utility model discloses the compatible circuit that a kind of MIPI shields and LVDS shields, this compatible circuit comprises MIPI common-mode filter, MIPI turns LVDS circuit and LVDS common-mode filter, CPU exports MIPI signal A1 and B1 to described MIPI and turns LVDS circuit and described MIPI common-mode filter, described MIPI turns LVDS circuit and exports LVDS signal A2 signal to described LVDS common-mode filter, described MIPI common-mode filter exports B2 signal and shields input end to MIPI, described LVDS common-mode filter exports A3 signal and shields input end to LVDS, described MIPI shields input end and LVDS shields input end electrical connection, the utility model achieves the object of the compatibility realizing LVDS and MIPI screen on a mainboard.
Description
Technical field
The utility model relates to a kind of compatible circuit, particularly relate to a kind of MIPI (Mobile IndustryProcessor Interface, mobile Industry Processor Interface) screen and the compatible circuit that shields of LVDS (Low-Voltage DifferentialSignaling, low-voltage differential signal).
Background technology
Digital screen market screen numerous and complicated, each block screen, for consumer electronics manufacturer, all means the new markets of, also just defines a new battlefield.But screen resource is relatively stable, and terminal market demand is somewhat intangible.During different screen possibility interfaces is also not quite similar, understand according to statistics current market mainly based on RGB LVDS MIPI shield interface, and RGB screen because resolution is low, disturb the reason such as large reducing share gradually, but LVDS shields because sector application is more, and MIPI screen is emerging protocols, so two kinds of interface screen compatibilities are very urgent.
At present, a motherboard circuit only supports that a certain screen is by real estate impact comparatively large (such as this kind of screen inadequate supply), affects product production capacity.If support two kinds of screens separately employing two motherboard design, workload and cost then have no advantage can be sayed.
Summary of the invention
For overcoming the deficiency that above-mentioned prior art exists, one of the utility model object is to provide the compatible circuit that a kind of MIPI shields and LVDS shields, and it achieves the compatibility of LVDS and MIPI screen on a mainboard.
For reaching above-mentioned and other object, the utility model proposes the compatible circuit that a kind of MIPI shields and LVDS shields, this compatible circuit comprises MIPI common-mode filter, MIPI turns LVDS circuit and LVDS common-mode filter, CPU exports MIPI signal A1 and B1 to described MIPI and turns LVDS circuit and described MIPI common-mode filter, described MIPI turns LVDS circuit and exports LVDS signal A2 signal to described LVDS common-mode filter, described MIPI common-mode filter exports B2 signal and shields input end to MIPI, described LVDS common-mode filter exports A3 signal and shields input end to LVDS, described MIPI shields input end and LVDS shields input end electrical connection.
Further, described LVDS signal and described MIPI signal form upper consistent.
Further, at the MIPI signal output part of CPU, described MIPI common-mode filter (U807, U808, U810, U812, U813) turns LVDS circuit chip (U809) input pickup resistance (R846, R847, R848, R849, R850, R852, R853, R854, R855, R856) near described MIPI and puts, at the LVDS signal input part of LVDS screen, described MIPI common-mode filter (U807, U808, U810, U812, U813) is put near described LVDS common-mode filter (U801, U802, U804, U805, U806).
Further, when shielding with LVDS, at the MIPI signal output part of CPU, described MIPI turns the input pickup resistance (R846, R847, R848, R849, R850, R852, R853, R854, R855, R856) of LVDS circuit chip and described MIPI turns LVDS circuit chip (U809) and peripheral components (C840, C865, C842, R857) goes up part, and described MIPI common-mode filter (U807, U808, U810, U812, U813) does not go up part.
Further, when shielding with LVDS, at the LVDS signal input part of LVDS screen, described LVDS common-mode filter (U801, U802, U804, U805, U806) and described MIPI turn LVDS circuit chip (U809) and the upper part of peripheral components (C840, C865, C842, R857) thereof, and described MIPI common-mode filter (U807, U808, U810, U812, U813) does not go up part.
Further, when shielding with MIPI, at the MIPI signal output part of CPU, described MIPI common-mode filter (U807, U808, U810, U812, U813), the input pickup resistance (R846, R847, R848, R849, R850, R852, R853, R854, R855, R856) that described MIPI turns LVDS circuit chip (U809) does not go up part.
Further, when shielding with MIPI, at the MIPI signal input part of MIPI screen, the upper part of described MIPI common-mode filter (U807, U808, U810, U812, U813), described LVDS common-mode filter (U801, U802, U804, U805, U806) and described MIPI turn LVDS circuit chip (U809) and peripheral components (C840, C865, C842, R857) does not go up part.
Compared with prior art, the compatible circuit of a kind of MIPI screen of the utility model and LVDS screen, by utilizing MIPI common-mode filter, MIPI turns LVDS circuit and LVDS common-mode filter and puts it and improve, and achieves and realize the compatible object of LVDS and MIPI screen on a mainboard.
Accompanying drawing explanation
Fig. 1 is the structural representation of the compatible circuit of a kind of MIPI screen of the utility model and LVDS screen;
Fig. 2 is the circuit structure diagram that in the utility model preferred embodiment, MIPI turns LVDS circuit;
Fig. 3 is the circuit structure diagram of MIPI common-mode filter in the utility model preferred embodiment;
Fig. 4 is the electrical block diagram of LVDS common-mode filter in the utility model preferred embodiment;
Fig. 5 is the placing structure schematic diagram of each device in the utility model.
Embodiment
Below by way of specific instantiation and accompanying drawings embodiment of the present utility model, those skilled in the art can understand other advantage of the present utility model and effect easily by content disclosed in the present specification.The utility model is also implemented by other different instantiation or is applied, and the every details in this instructions also can based on different viewpoints and application, carries out various modification and change not deviating under spirit of the present utility model.
Fig. 1 is the structural representation of the compatible circuit of a kind of MIPI screen of the utility model and LVDS screen.As shown in Figure 1, the compatible circuit of a kind of MIPI screen of the utility model and LVDS screen, comprising: MIPI common-mode filter 10, MIPI turn LVDS circuit 20 and LVDS common-mode filter 30.
Wherein CPU exports MIPI signal and A1 signal/B1 signal (A1 signal and B1 signal electrically on link together) and turns LVDS circuit 20 and MIPI common-mode filter 10 to MIPI, LVDS circuit 20 exports A2 signal and is connected to LVDS common-mode filter 30, MIPI common-mode filter 10 exports B2 signal and shields input end to MIPI, LVDS common-mode filter 30 exports A3 signal and shields input end to LVDS, MIPI shield input end and LVDS shield input end electrically on link together.
Fig. 2 is the circuit structure diagram that in the utility model preferred embodiment, MIPI turns LVDS circuit, current platform generally only supports that MIPI exports, LVDS needs to be transformed by MIPI signal, in the utility model, LVDS signal and MIPI signal form upper consistent, i.e. a pair difference clock and 4 pair differential data line, MIPI signal turns the circuit structure of LVDS signal as shown in Figure 2, Fig. 3 is the circuit structure diagram of MIPI common-mode filter in the utility model preferred embodiment, and Fig. 4 is the electrical block diagram of LVDS common-mode filter in the utility model preferred embodiment.Because foregoing circuit structure is prior art, do not repeat them here.
Because LVDS signal and MIPI signal are all high speed sensitive signal, signal all needs to do 100 ohmages and controls, so do not allowed smear phenomenon, otherwise signal will mismatch cause screen not work.After having added conversion chip (MIPI turns LVDS circuit), conventional goods of furniture for display rather than for use can affect Signal Matching.If LVDS screen, the existence of B1 signal can make LVDS input signal bifurcated, if MIPI screen, the existence of A1 signal can make MIPI input signal bifurcated, and in like manner, output terminal is also same problem.Therefore, need to improve the placing structure of each device of foregoing circuit.
Fig. 5 is the placing structure schematic diagram of each device in the utility model.See also Fig. 1-Fig. 4, below the placing structure of each device elaborated:
1, when shielding with LVDS:
At the MIPI signal output part of CPU, it is MIPI_TDP0/MIPI_TDN0 that CPU exports MIPI signal, MIPI_TDP1/MIPI_TDN1, MIPI_TDP2/MIPI_TDN2, MIPI_TDP3/MIPI_TDN3, MIPI_TCP/MIPI_TCN, it is divided into two-way, wherein A1 signal leads directly to MIPI and turns LVDS circuit chip (U809), B1 signal is electrically gone up and A1 signal is consolidated network but for being connected to MIPI common-mode filter, in order to the impact that the bifurcated signal B1 signal reducing A1 signal exists, so will MIPI common-mode filter U807, U808, U810, U812, U813 turns LVDS circuit chip (U809) input pickup resistance R846 near MIPI, R847, R848, R 849, R850, R852, R853, R854, R855, R856 puts, as shown in Figure 5, and now resistance R846, R 847, R 848, R 849, R 850, R 852, R 853, R 854, R 855, R 856 and MIPI turns LVDS circuit chip (U809) and peripheral components C840 thereof, C865, C842, the upper part of R857, MIPI turns LVDS circuit chip (U809) and exports A2 signal, and MIPI common-mode filter U807, U808, U810, U812, U813 does not go up part, so decrease the harmful effect that MIPI turns the bifurcated signal B1 signal of LVDS circuit chip (U809) input end A1 signal.
At the LVDS signal input part of LVDS screen, MIPI turns LVDS circuit chip (U809) output signal for A2 signal, i.e. LCM_RIN0+/-, LCM_RIN1+/-, LCM_RIN2+/-, LCM_RIN3+/-, LCM_CLKIN+/-, this output signal is through LVDS common-mode filter U801, U802, U804, U805, U806 is converted to the LVDS signal A3 signal of LVDS screen, i.e. LCM1_RIN0+/-, LCM1_RIN1+/-, LCM1_RIN2+/-, LCM1_RIN3+/-, LCM1_CLKIN+/-, the impact that the B2 signal exported to reduce MIPI common-mode filter exists, so will MIPI common-mode filter U807, U808, U810, U812, U813 is near LVDS common-mode filter U801, U802, U804, U805, U806 puts, as shown in Figure 5, and now LVDS common-mode filter U801, U802, U804, U805, U806 and MIPI turns LVDS circuit chip (U809) and peripheral components C840 thereof, C865, C842, the upper part of R857, and MIPI common-mode filter U807, U808, U810, U812, U813 does not go up part, so decrease the harmful effect of the bifurcated signal B1 signal of the LVDS signal input part signal A1 signal of LVDS screen.
2, when shielding with MIPI:
At the MIPI signal output part of CPU, it is MIPI_TDP0/MIPI_TDN0 that CPU exports MIPI signal, MIPI_TDP1/MIPI_TDN1, MIPI_TDP2/MIPI_TDN2, MIPI_TDP3/MIPI_TDN3, MIPI_TCP/MIPI_TCN, it is divided into two-way, wherein B1 signal leads directly to MIPI common-mode filter, A1 signal is electrically gone up and B1 signal is consolidated network but turns LVDS IC (U809) for being connected to MIPI, in order to the impact that the bifurcated signal A1 signal reducing B1 signal exists, so will MIPI common-mode filter U807, U808, U810, U812, U813 turns LVDS circuit chip (U809) input pickup resistance R846 near MIPI, R847, R 848, R 849, R 850, R 852, R 853, R 854, R 855, R 856 puts, as shown in Figure 5, and now MIPI common-mode filter U807, U808, U810, U812, the upper part of U813, it exports as B2 signal, and R846, R 847, R 848, R 849, R 850, R 852, R 853, R 854, R 855, R 856 does not go up part, so decrease MIPI common-mode filter U807, U808, U810, U812, the harmful effect of the bifurcated signal A1 signal of U813 input end B1 signal B1 signal.
At the MIPI signal input part of MIPI screen, the MIPI signal (B1 signal) that CPU exports is through MIPI common-mode filter U807, U808, U810, U812, U813 be converted to output signal MIPI screen MIPI signal (B2 signal) LCM1_RIN0+/-, LCM1_RIN1+/-, LCM1_RIN2+/-, LCM1_RIN3+/-, LCM1_CLKIN+/-(electrically LVDS signal A3 signal that is upper and LVDS screen shares), in order to reduce the impact that A3 signal exists, so will MIPI common-mode filter U807, U808, U810, U812, U813 is near LVDS common-mode filter U801, U802, U804, U805, U806 puts, as shown in Figure 5, and now MIPI common-mode filter U807, U808, U810, U812, the upper part of U813, and LVDS common-mode filter U801, U802, U804, U805, U806 and MIPI turns LVDS circuit chip (U809) and peripheral components C840 thereof, C865, C842, R857 does not go up part, so decrease the harmful effect of the bifurcated signal A3 signal of the MIPI signal (B2 signal) that signal MIPI shields.
Above-described embodiment is illustrative principle of the present utility model and effect thereof only, but not for limiting the utility model.Any those skilled in the art all without prejudice under spirit of the present utility model and category, can carry out modifying to above-described embodiment and change.Therefore, rights protection scope of the present utility model, should listed by claims.
Claims (7)
1. the compatible circuit of a MIPI screen and LVDS screen, it is characterized in that: this compatible circuit comprises MIPI common-mode filter, MIPI turns LVDS circuit and LVDS common-mode filter, CPU exports MIPI signal A1 and B1 to described MIPI and turns LVDS circuit and described MIPI common-mode filter, described MIPI turns LVDS circuit and exports LVDS signal A2 signal to described LVDS common-mode filter, described MIPI common-mode filter exports B2 signal and shields input end to MIPI, described LVDS common-mode filter exports A3 signal and shields input end to LVDS, described MIPI shields input end and LVDS shields input end electrical connection.
2. the compatible circuit of a kind of MIPI screen as claimed in claim 1 and LVDS screen, is characterized in that: described LVDS signal and described MIPI signal form upper consistent.
3. the compatible circuit of a kind of MIPI screen as claimed in claim 2 and LVDS screen, it is characterized in that: at the MIPI signal output part of CPU, described MIPI common-mode filter (U807, U808, U810, U812, U813) LVDS circuit chip (U809) input pickup resistance (R846 is turned near described MIPI, R847, R848, R849, R850, R852, R853, R854, R855, R856) put, at the LVDS signal input part of LVDS screen, described MIPI common-mode filter (U807, U808, U810, U812, U813) near described LVDS common-mode filter (U801, U802, U804, U805, U806) put.
4. the compatible circuit of a kind of MIPI screen as claimed in claim 3 and LVDS screen, it is characterized in that: when shielding with LVDS, at the MIPI signal output part of CPU, described MIPI turns the input pickup resistance (R846, R847, R848, R849, R850, R852, R853, R854, R855, R856) of LVDS circuit chip and described MIPI turns LVDS circuit chip (U809) and peripheral components (C840, C865, C842, R857) goes up part, and described MIPI common-mode filter (U807, U808, U810, U812, U813) does not go up part.
5. the compatible circuit of a kind of MIPI screen as claimed in claim 3 and LVDS screen, it is characterized in that: when shielding with LVDS, at the LVDS signal input part of LVDS screen, described LVDS common-mode filter (U801, U802, U804, U805, U806) and described MIPI turn LVDS circuit chip (U809) and the upper part of peripheral components (C840, C865, C842, R857) thereof, and described MIPI common-mode filter (U807, U808, U810, U812, U813) does not go up part.
6. the compatible circuit of a kind of MIPI screen as claimed in claim 3 and LVDS screen, it is characterized in that: when shielding with MIPI, at the MIPI signal output part of CPU, described MIPI common-mode filter (U807, U808, U810, U812, U813), the input pickup resistance (R846, R847, R848, R849, R850, R852, R853, R854, R855, R856) that described MIPI turns LVDS circuit chip (U809) does not go up part.
7. the compatible circuit of a kind of MIPI screen as claimed in claim 3 and LVDS screen, it is characterized in that: when shielding with MIPI, at the MIPI signal input part of MIPI screen, the upper part of described MIPI common-mode filter (U807, U808, U810, U812, U813), described LVDS common-mode filter (U801, U802, U804, U805, U806) and described MIPI turn LVDS circuit chip (U809) and peripheral components (C840, C865, C842, R857) does not go up part.
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| CN201520341609.5U CN204650515U (en) | 2015-05-25 | 2015-05-25 | The compatible circuit of a kind of MIPI screen and LVDS screen |
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| CN201520341609.5U CN204650515U (en) | 2015-05-25 | 2015-05-25 | The compatible circuit of a kind of MIPI screen and LVDS screen |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019000318A1 (en) * | 2017-06-29 | 2019-01-03 | 广东高云半导体科技股份有限公司 | General purpose interface circuit compatible with mipi signal output |
| CN109683836A (en) * | 2018-12-04 | 2019-04-26 | 珠海妙存科技有限公司 | A kind of driving device being compatible with a variety of display protocol hardware interfaces |
| CN109697968A (en) * | 2018-12-13 | 2019-04-30 | 山东亚华电子股份有限公司 | A kind of system of compatible various display screens |
| CN113160759A (en) * | 2021-03-31 | 2021-07-23 | 智道网联科技(北京)有限公司 | Display screen circuit selection method, intelligent networking equipment mainboard and electronic equipment |
-
2015
- 2015-05-25 CN CN201520341609.5U patent/CN204650515U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019000318A1 (en) * | 2017-06-29 | 2019-01-03 | 广东高云半导体科技股份有限公司 | General purpose interface circuit compatible with mipi signal output |
| CN109683836A (en) * | 2018-12-04 | 2019-04-26 | 珠海妙存科技有限公司 | A kind of driving device being compatible with a variety of display protocol hardware interfaces |
| CN109683836B (en) * | 2018-12-04 | 2022-04-19 | 珠海妙存科技有限公司 | Driving device compatible with hardware interfaces of various display protocols |
| CN109697968A (en) * | 2018-12-13 | 2019-04-30 | 山东亚华电子股份有限公司 | A kind of system of compatible various display screens |
| CN113160759A (en) * | 2021-03-31 | 2021-07-23 | 智道网联科技(北京)有限公司 | Display screen circuit selection method, intelligent networking equipment mainboard and electronic equipment |
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