[introduction] at present already more and more cars use O/LED as light, its have the character of digitlization, no matter be the light before regarding as, day travel lamp, turn to the lamp, brake lamp or taillight, can offer car to be on modelling more designs are stretch, make its are had more individuation and identify degree, provide the security with higher car, the poor dissimilation that also promoted a car the design and value feel, make digital light has not at traditional light, have outstanding competitive advantage. The article will introduce the development trend of digital light for you, and the digital light that by Ai Rui the electron rolls out devises a solution.

Digital light has outstanding performance and advantage

As the need that automobile industry admits, digital light is approbated already generally by automobile industry, since Ao Di TT 2016 use OLED taillight initiates a new era, ao Di Q5 rolled out digitlization OLED taillight to begin then again 2020, in modelling, individuation and security aspect open up a new way. The face illuminant with the even, ultrathin light of OLED need not glance board wait for character, decided its regard a number as the advantage of light. OLED more and more get the attention of automobile factory and light manufactory.

The indication that is based on OLED is characteristic, realize personalized control more easily also. In car lighting system, digital light has the double function of illume and mixed pattern directive, show wide lamp, brake tube for instance, hind turn to the lamp, how-to lamp waits signal a moment. Have the aid of is some closer year come the abidance of OLED technology development and application, the function of car lamp promotes information from illume, directive gradually alternant, and achieve a design aesthetic the height with lamplight show.

Since Ao Di uses digital OLED tail light, car taillight and indicator light are evolving to show vehicle into a kind, in evolving the next time, it can undertake expanding through a variety of functions. From the point of metaphase, digital OLED will have more glow partition, every glow partition can be controlled alone and activation systematically. In future, besides what can realize illume to design muti_function besides modelling and individuation, still can realize more functions, what count the person that word OLED can be used to other way to issue risk for example is inchoate warn or car condition traffic information, for example road is wet slippery, traffic embraces information of state of an end, traffic light to wait a moment, the security that can enhance car travel greatly.

The OLED drive chip with compositive height

The lead firm of car chip market, its have the L99LDLH32 of chip of OLED special drive with meaning law newest semiconductor compositive degree of tall, effect is good wait for an advantage, and by course of study inside approbate extensively. L99LDLH32 is compositive passageway of 32 high margins, can use distributed drive many resemble element OLED lamp high piece, those who face next generation digitlization, individuation is tall design of light resembling element, implementation backs more glow unit and the design requirement of more mixed dynamic indication effect.

With peculiar CAN-FD Light interface is linked together between taillight drive and ECU, so that taillight drive is compositive to light brigade module, shortened join wiring harness, in order to realize individuation but process designing taillight shows. The characteristic of L99LDLH32 included compositive passageway of 32 high margins, 1mA~15mA of capacity of output of every passageway electric current (can configure output for paralell connection in order to enhance drive ability) , supportive imitate and PWM attune are smooth (independence or multichannel in group) .

In addition L99LDLH32 is returned inside interface of CAN-FD of buy 1Mbit/s high speed, realize configuration of agile net of group of taillight drive area, support result of high frequency refresh, have rich configuration, protection and diagnostic function (too open circuit, short circuit, lukewarm, chip is mixed lamp board temperature is monitored) , and DIN can be used to input the function such as the foot below mode of overtime watchdog, Fail-safe, can help the design requirement that realizes ASIL B of systematic function security, accord with AEC-Q100 standard, have low need machine electricity, and fail-safe and bus line mode operate independent ／ , limits of voltage of working power source is 40 V of – of 5.5 V.

The height of chip of profit from L99LDLH32 is compositive (bus line is sent and receive implement, brilliant of high accuracy interior brace up etc) , use QFN 7X7 enclose, great simplified the design of its periphery circuit and reduce PCB size. L99LDLH32 uses distributed bus line to turn control, shorten wiring harness join, design of its principle graph is simple, convenient and rapid development. This parts of an apparatus is compositive CAN is sent and receive implement, LDO, oscillator, its periphery parts of an apparatus is very accordingly compact. L99LDLH32 besides can use compatible interface of CAN FD Light to move below bus line mode, use programmable EEPROM (FTP) memory can set 2 kinds of independent pattern (Limp Home) .

The car illuminates the good solution of bright application

L99LDLH32 returns the cascade of supportable the biggest 128PCS, link of odd CAN FD can control 4k to resemble element most, compatible big data resembles the use place of element, can be in – the working temperature limits of 150 ℃ of 40 ℃ – is run, but section of outward ministry preliminary adjustments implement feedback voltage, adjust in order to optimize voltage, utmost ground reduces integral power comsumption, set the electric current of every passageway through 8 DAC, control of brightness of index of independence of passageway of 8 light of supportive imitate attune, PWM and attune of PWM of 8 overall situation are smooth, and but frequency of process designing PWM, have slow open ／ to shut type of time, advance gradually to output defer and shake clock, in order to acquire better EMC property.

L99LDLH32 is compositive 8 ADC, can use at comprehensive, agile diagnose, have industrial siding of bus line of a fault, offer temperature too warning, lukewarm close (2 temperature threshold value) , short circuit and open circuit load detect and protect, can be measured through exterior NTC and knot of parts of an apparatus is lukewarm (TJ) reduce LED electric current automatically. Chip interior is compositive sensor of a temperature, a thermal resistor is received to measure external environment temperature outside supporting, double temperature is multiple protection can ensure with diagnostic function the safety of light and stable use.

L99LDLH32 returns supportable control to amount to 2 sole illume functions, every passageway is OK image or not image arrives to be inputted directly, and the voltage of exterior power source that carries preliminary adjustments red-letter day, this function ensured the control of highest flexibility strings together the different illume function that length comprises by different O/LED type, electric current and lamp, can use at the application such as the taillight before car O/LED and car annulus illume.

Offer complete digital light to consult design and technology support

The reference of alternant headlight designs the digital intelligence that the ST of ESC group combination of Ai Rui electron and OLED screen supplier develop together, had installed solid car to go up at present. Additionally Ai Rui electron also designed to demonstrate independently, be in Hua Na electron exhibited Munich 2022 and ALE light exhibits aspirant travel to reveal.

Branch of ESC of Ai Rui electron has the experience that rich supportive client produces to batch from prototype, can provide complete development data, include what the test evaluates to demonstrate, graph of hardware design principle, and the software that software consults source code reachs whole project debugs support, convenient client develops his project quickly, can offer complete prototype solution.

In the supportive respect of hardware part, ai Rui electron returns those who prepared functional all ready to demonstrate sample, can support client project, offer drive board and control plate to be a client prototype of fast and custom-built project is offerred convenient. The support of software part, the source code that can offer the functional all ready that is based on SPC582B (complete function of initialization, FTP, ID, cascade, dynamic effect demonstrates to wait a moment) , besides offer referenced source code to still can help a client do code transplanting and project to debug, help client goes to source code transplanting in client project platform, and provide ID and FTP download tool and tool of automatic process designing, and functional security and EMC processing technique, can make dynamic effect, provide overall technical support for project development and production.

If need to understand the more technicality of this plan, the welcome sends mail to arrive: Arrowtechnicalsupport.ap@arrow.com gets more information and the solution of concerned doubt, thank!

Epilogue

As the rapid development of O/LED technology, color, brightness and stability can satisfy applied requirement, the price also more hasten is reasonable, make digital light application develops flourishingly quickly, market potential is valued increasingly. The L99LDLH32 of chip of OLED special drive with the meaning law newest semiconductor of article introduction, have height compositive character, and the digital light reference that Ai Rui electron rolls out is designed, develop what can accelerate client product rate, be worth to have fun at the manufacturer of devoted and relevant market is farther thorough knowledge and use.

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